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/*!
 * SEO AEO — Design System v2 (2026)
 * 주식회사 뎁팀 (DevTeam Co., Ltd.) · https://www.seoaeo.co.kr
 * Brand: Emerald (growth) · Slate (engineering) · Amber (signal)
 */

/* ==========================================================
   1. Tokens
   ========================================================== */
:root {
  /* Slate (ink) */
  --ink-950: #020617;
  --ink-900: #0f172a;
  --ink-800: #1e293b;
  --ink-700: #334155;
  --ink-600: #475569;
  --ink-500: #64748b;
  --ink-400: #94a3b8;
  --ink-300: #cbd5e1;
  --ink-200: #e2e8f0;
  --ink-100: #f1f5f9;
  --ink-50:  #f8fafc;
  --white:   #ffffff;

  /* Emerald (brand) */
  --brand-900: #064e3b;
  --brand-800: #065f46;
  --brand-700: #047857;
  --brand-600: #059669;
  --brand-500: #10b981;
  --brand-400: #34d399;
  --brand-300: #6ee7b7;
  --brand-200: #a7f3d0;
  --brand-100: #d1fae5;
  --brand-50:  #ecfdf5;
  --brand-ink: #022c22;

  /* Cyan (tech) · Amber (signal) · Status */
  --cyan-600: #0891b2;
  --cyan-400: #22d3ee;
  --cyan-50:  #ecfeff;
  --amber-600: #d97706;
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;
  --amber-50:  #fffbeb;
  --violet-600: #7c3aed;
  --violet-50: #f5f3ff;
  --red-600: #dc2626;
  --red-50: #fef2f2;

  /* Legacy aliases (older content) */
  --gray-900: var(--ink-900); --gray-800: var(--ink-800); --gray-700: var(--ink-700); --gray-600: var(--ink-600);
  --gray-500: var(--ink-500); --gray-400: var(--ink-400); --gray-300: var(--ink-300); --gray-200: var(--ink-200);
  --gray-100: var(--ink-100); --gray-50: var(--ink-50); --danger: var(--red-600); --border-color: var(--ink-200); --accent: var(--brand-600);

  /* Semantic */
  --text: var(--ink-700);
  --text-strong: var(--ink-900);
  --text-muted: var(--ink-500);
  --border: var(--ink-200);
  --border-strong: var(--ink-300);
  --surface: var(--white);
  --surface-muted: var(--ink-50);
  --link: var(--brand-700);

  /* Type */
  --font-sans: "Pretendard Site", "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Radius · Shadow */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 999px;
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 12px -6px rgba(15, 23, 42, .10);
  --shadow-md: 0 1px 2px rgba(15, 23, 42, .04), 0 12px 32px -12px rgba(15, 23, 42, .18);
  --shadow-lg: 0 2px 4px rgba(15, 23, 42, .04), 0 24px 56px -20px rgba(15, 23, 42, .28);

  /* Layout */
  --container: 1200px;
  --gutter: 20px;
  --header-h: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

@media (min-width: 768px) {
  :root { --gutter: 32px; }
}

/* ==========================================================
   2. Reset & base
   ========================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--white) linear-gradient(var(--ink-950) var(--header-h), var(--white) 0) no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: keep-all;
  overflow-wrap: break-word;
  font-feature-settings: "ss06";
}

img, svg, video, picture { display: block; max-width: 100%; }
img { height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
table { border-collapse: collapse; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }

a { color: var(--link); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--brand-800); }

:focus-visible {
  outline: 3px solid var(--brand-600);
  outline-offset: 2px;
  border-radius: 4px;
}

.site-header :focus-visible, .hero :focus-visible, .section-dark :focus-visible, .site-footer :focus-visible,
.cta-band :focus-visible, .card-dark :focus-visible, .demo-strip :focus-visible, .mobile-cta :focus-visible { outline-color: var(--brand-400); }

::selection { background: var(--brand-200); color: var(--brand-ink); }

.skip-link {
  position: absolute;
  left: 12px;
  top: -100px;
  z-index: 1000;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  background: var(--white);
  color: var(--ink-900);
  font-weight: 600;
  box-shadow: var(--shadow-md);
}
.skip-link:focus { top: 12px; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* ==========================================================
   3. Typography
   ========================================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 1.3rem + 3vw, 3.5rem); font-weight: 800; line-height: 1.18; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.625rem, 1.2rem + 1.6vw, 2.5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.25; }
h3 { font-size: clamp(1.1875rem, 1.05rem + .5vw, 1.375rem); }
h4 { font-size: 1.0625rem; }

p { text-wrap: pretty; }
strong, b { font-weight: 700; color: var(--text-strong); }
small { font-size: .875rem; }
code, kbd, pre { font-family: var(--font-mono); }
/* Chinese terms use system CJK fonts (Pretendard has no Hanzi; avoids downloading fallback subsets) */
:lang(zh) { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brand-700);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}
.on-dark .eyebrow, .eyebrow.on-dark, .section-dark .eyebrow { color: var(--brand-400); }

.lead {
  font-size: clamp(1.0625rem, 1rem + .35vw, 1.25rem);
  line-height: 1.75;
  color: var(--ink-600);
}

.text-muted { color: var(--text-muted); }
.text-strong { color: var(--text-strong); }
.text-brand { color: var(--brand-700); }
.text-center { text-align: center; }
.text-sm { font-size: .875rem; }
.text-xs { font-size: .8125rem; }
.nowrap { white-space: nowrap; }

.gradient-text {
  background: linear-gradient(92deg, var(--brand-300) 0%, var(--brand-400) 35%, var(--cyan-400) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

mark, .mark {
  background: linear-gradient(transparent 58%, rgba(245, 158, 11, .28) 58%);
  color: inherit;
  padding: 0 2px;
}

/* ==========================================================
   4. Layout
   ========================================================== */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-narrow { max-width: calc(820px + var(--gutter) * 2); }
.container-wide { max-width: calc(1320px + var(--gutter) * 2); }

.section { padding-block: clamp(64px, 5rem + 3vw, 120px); }
.section-sm { padding-block: clamp(40px, 2.5rem + 2vw, 72px); }
.section-muted { background: var(--surface-muted); }
.section-tint { background: linear-gradient(180deg, var(--brand-50) 0%, var(--white) 100%); }

.section-dark {
  position: relative;
  background: var(--ink-950);
  color: var(--ink-300);
  overflow: hidden;
  isolation: isolate;
}
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4, .section-dark strong { color: var(--white); }
.section-dark .lead { color: var(--ink-300); }
.section-dark a:not(.btn) { color: var(--brand-300); }

.section-head { max-width: 760px; margin-bottom: clamp(36px, 2rem + 1.5vw, 56px); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 + .lead { margin-top: 16px; }

.section.pt-sm { padding-top: 48px; }
.card-title { font-size: 1.125rem; }
.stack > * + * { margin-top: var(--stack, 1rem); }

.grid { display: grid; gap: var(--gap, 24px); }
.grid-2, .grid-3, .grid-4 { display: grid; gap: var(--gap, 24px); grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.split { display: grid; gap: clamp(32px, 4vw, 64px); align-items: center; }
@media (min-width: 1024px) {
  .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .split-60 { grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); }
  .split-40 { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); }
}

.gap-sm { --gap: 16px; }
.gap-lg { --gap: 40px 32px; }
.items-start { align-items: start; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; }
.mx-auto { margin-inline: auto; }
.w-full { width: 100%; }
.hidden { display: none !important; }

@media (max-width: 767px) { .hide-mobile { display: none !important; } }
@media (min-width: 768px) { .show-mobile { display: none !important; } }

/* ==========================================================
   5. Buttons · badges · chips
   ========================================================== */
.btn {
  --btn-bg: var(--ink-900);
  --btn-fg: var(--white);
  --btn-bd: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid var(--btn-bd);
  border-radius: var(--r-md);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-align: center;
  white-space: nowrap;
  transition: transform .15s var(--ease), background-color .15s var(--ease), border-color .15s var(--ease), box-shadow .15s var(--ease), color .15s var(--ease);
}
.btn:hover { color: var(--btn-fg); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 18px; height: 18px; flex: none; }

.btn-primary {
  --btn-bg: var(--brand-500);
  --btn-fg: var(--brand-ink);
  box-shadow: 0 8px 24px -10px rgba(16, 185, 129, .65), inset 0 1px 0 rgba(255, 255, 255, .25);
}
.btn-primary:hover { --btn-bg: var(--brand-400); box-shadow: 0 12px 28px -10px rgba(16, 185, 129, .75), inset 0 1px 0 rgba(255, 255, 255, .3); }

.btn-dark { --btn-bg: var(--ink-900); --btn-fg: var(--white); }
.btn-dark:hover { --btn-bg: var(--ink-800); }

.btn-outline { --btn-bg: var(--white); --btn-fg: var(--ink-900); --btn-bd: var(--border-strong); }
.btn-outline:hover { --btn-bd: var(--ink-400); --btn-bg: var(--ink-50); }

.btn-ghost-dark { --btn-bg: rgba(255, 255, 255, .06); --btn-fg: var(--white); --btn-bd: rgba(255, 255, 255, .18); }
.btn-ghost-dark:hover { --btn-bg: rgba(255, 255, 255, .12); --btn-bd: rgba(255, 255, 255, .32); }

.btn-sm { min-height: 40px; padding: 8px 16px; font-size: .9375rem; border-radius: 10px; }
.btn-lg { min-height: 56px; padding: 14px 28px; font-size: 1.0625rem; }
.btn-block { width: 100%; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; transform: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-row.center { justify-content: center; }

.link-arrow {
  display: inline-flex;
  padding-block: 4px;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--brand-700);
}
.link-arrow::after { content: "→"; transition: transform .15s var(--ease); }
.link-arrow:hover::after { transform: translateX(3px); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  font-size: .75rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .02em;
  background: var(--ink-100);
  color: var(--ink-700);
  white-space: nowrap;
}
.badge-brand { background: var(--brand-50); color: var(--brand-800); box-shadow: inset 0 0 0 1px var(--brand-200); }
.badge-amber { background: var(--amber-50); color: #92400e; box-shadow: inset 0 0 0 1px #fde68a; }
.badge-cyan { background: var(--cyan-50); color: #155e75; box-shadow: inset 0 0 0 1px #a5f3fc; }
.badge-violet { background: var(--violet-50); color: #5b21b6; box-shadow: inset 0 0 0 1px #ddd6fe; }
.badge-dark { background: var(--ink-900); color: var(--white); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 8px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .06);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .14);
  color: var(--ink-200);
  font-size: .875rem;
  font-weight: 600;
}
.pill .dot {
  position: relative;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(16, 185, 129, .18);
  display: grid; place-items: center;
}
.pill .dot::after {
  content: "";
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand-400);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, .7);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, .6); }
  70% { box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.chip-list { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; }
/* Reading path: PART 00 → 01 → … as tappable chips */
.path { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; color: var(--ink-400); font-size: .875rem; }
.path a { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; min-height: 32px; padding: 0 10px; border-radius: var(--r-full); background: var(--white); box-shadow: inset 0 0 0 1px var(--border); color: var(--ink-800); font-weight: 700; }
.path a:hover { color: var(--brand-800); box-shadow: inset 0 0 0 1px var(--brand-300); }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  background: var(--white);
  font-size: .875rem;
  font-weight: 600;
  color: var(--ink-700);
}
.section-dark .chip { border-color: rgba(255, 255, 255, .12); background: rgba(255, 255, 255, .04); color: var(--ink-200); }

/* ==========================================================
   6. Header & navigation
   ========================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(2, 6, 23, .82);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  flex: none;
}
.brand:hover { color: var(--white); }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand small {
  display: none;
  font-size: .75rem;
  font-weight: 600;
  color: var(--ink-400);
  letter-spacing: 0;
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, .16);
}
@media (min-width: 1100px) { .brand small { display: inline; } }

.main-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 4px; list-style: none; padding: 0; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 40px;
  padding: 0 14px;
  border-radius: 10px;
  color: var(--ink-300);
  font-size: .9375rem;
  font-weight: 600;
  background: none;
  border: 0;
}
.nav-link:hover, .nav-item:focus-within > .nav-link { color: var(--white); background: rgba(255, 255, 255, .07); }
.nav-link[aria-current="page"], .nav-item.is-active > .nav-link { color: var(--white); background: rgba(16, 185, 129, .14); box-shadow: inset 0 0 0 1px rgba(52, 211, 153, .25); }
.nav-item { position: relative; }
.nav-item.has-sub > .nav-link svg { width: 14px; height: 14px; opacity: .7; transition: transform .15s var(--ease); }

.subnav {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  width: 360px;
  padding: 8px;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(15, 23, 42, .06);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 6px);
  transition: opacity .15s var(--ease), transform .15s var(--ease), visibility .15s;
  list-style: none;
}
.subnav::before { content: ""; position: absolute; left: 0; right: 0; top: -12px; height: 12px; }
.nav-item.has-sub:hover > .subnav,
.nav-item.has-sub:focus-within > .subnav { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav-item.has-sub:hover > .nav-link svg { transform: rotate(180deg); }
.subnav a {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 2px 12px;
  padding: 10px 12px;
  border-radius: var(--r-md);
  color: var(--ink-900);
}
.subnav a:hover, .subnav a[aria-current="page"] { background: var(--ink-50); }
.subnav .ico {
  grid-row: span 2;
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--brand-50);
  color: var(--brand-700);
}
.subnav .ico svg { width: 18px; height: 18px; }
.subnav strong { font-size: .9375rem; line-height: 1.35; }
.subnav span:not(.ico) { font-size: .8125rem; color: var(--ink-500); line-height: 1.45; }

.header-cta { margin-left: 8px; }
.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px; height: 44px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .16);
  background: rgba(255, 255, 255, .04);
  color: var(--white);
  align-items: center; justify-content: center;
}
.nav-toggle svg { width: 22px; height: 22px; }
.nav-toggle .i-close { display: none; }
.nav-open .nav-toggle .i-open { display: none; }
.nav-open .nav-toggle .i-close { display: block; }

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    margin: 0;
    padding: 16px var(--gutter) 32px;
    background: var(--ink-950);
    overflow-y: auto;
    display: none;
  }
  .nav-open .main-nav { display: block; }
  /* backdrop-filter would make the header the containing block of the fixed panel */
  .nav-open .site-header { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--ink-950); }
  .nav-open { overflow: hidden; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid rgba(255, 255, 255, .08); }
  .nav-link { width: 100%; height: 56px; padding: 0 4px; font-size: 1.0625rem; color: var(--white); border-radius: 0; }
  .nav-link:hover { background: none; }
  .nav-item.has-sub > .nav-link svg { display: none; }
  .subnav {
    position: static;
    width: auto;
    padding: 0 0 12px;
    background: none;
    box-shadow: none;
    opacity: 1; visibility: visible; transform: none;
  }
  .subnav a { color: var(--ink-200); padding: 10px 4px; }
  .subnav strong { color: var(--white); }
  .subnav a[aria-current="page"] { background: rgba(255, 255, 255, .06); }
  .nav-link[aria-current="page"], .nav-item.is-active > .nav-link { background: none; box-shadow: none; color: var(--brand-300); }
  .subnav a:hover { background: rgba(255, 255, 255, .05); }
  .subnav .ico { background: rgba(16, 185, 129, .14); color: var(--brand-300); }
  .subnav span:not(.ico) { color: var(--ink-400); }
  .mobile-cta { display: grid; gap: 10px; margin-top: 24px; }
}
@media (min-width: 1024px) { .mobile-cta { display: none; } }

/* ==========================================================
   7. Page heroes · breadcrumb
   ========================================================== */
.hero {
  position: relative;
  padding-block: clamp(56px, 4rem + 4vw, 128px) clamp(64px, 4rem + 4vw, 120px);
  background: var(--ink-950);
  color: var(--ink-300);
  overflow: hidden;
  isolation: isolate;
}
.hero h1, .hero strong { color: var(--white); }
.hero .lead { color: var(--ink-300); margin-top: 20px; max-width: 640px; }
.hero-bg, .hero-bg::before, .hero-bg::after { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hero-bg {
  background:
    radial-gradient(60% 55% at 12% 0%, rgba(16, 185, 129, .20) 0%, rgba(16, 185, 129, 0) 70%),
    radial-gradient(45% 50% at 95% 20%, rgba(34, 211, 238, .14) 0%, rgba(34, 211, 238, 0) 70%),
    radial-gradient(40% 40% at 70% 110%, rgba(245, 158, 11, .10) 0%, rgba(245, 158, 11, 0) 70%);
}
.hero-bg::before {
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
}
.hero-bg::after {
  content: "";
  top: auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(52, 211, 153, .45), transparent);
}

.hero-home .hero-grid { display: grid; gap: 56px; align-items: center; }
@media (min-width: 1080px) {
  .hero-home .hero-grid { grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); gap: 48px; }
}
.hero-home h1 { margin-top: 22px; font-size: clamp(2.125rem, 1.1rem + 3vw, 3.25rem); }
.hero-actions { margin-top: 32px; }
.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 28px;
  padding: 0;
  list-style: none;
  font-size: .9375rem;
  color: var(--ink-400);
}
.hero-proof li { display: inline-flex; align-items: center; gap: 8px; }
.hero-proof svg { width: 18px; height: 18px; color: var(--brand-400); flex: none; }

.page-hero { padding-block: clamp(48px, 3rem + 3vw, 96px) clamp(48px, 3rem + 2.5vw, 88px); }
.page-hero h1 { margin-top: 14px; font-size: clamp(1.875rem, 1.2rem + 2.6vw, 3rem); max-width: 900px; }
.page-hero .lead { max-width: 760px; }
.page-hero.center { text-align: center; }
.page-hero.center h1, .page-hero.center .lead { margin-inline: auto; }
.page-hero.center .btn-row, .page-hero.center .breadcrumb ol { justify-content: center; }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  list-style: none;
  font-size: .875rem;
  color: var(--ink-400);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb li + li::before { content: "/"; color: var(--ink-600); }
.breadcrumb a { display: inline-block; padding: 6px 0; color: var(--ink-300); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb [aria-current="page"] { color: var(--ink-400); }

/* ==========================================================
   8. Hero visual (product-style mockups, pure HTML/CSS)
   ========================================================== */
.hero-visual { position: relative; display: grid; gap: 16px; }
@media (min-width: 640px) {
  .hero-visual { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-visual .mock-ai { grid-column: 1 / -1; }
}
@media (min-width: 1080px) { .hero-visual { padding-left: 8px; } }

.mock {
  position: relative;
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(30, 41, 59, .78) 0%, rgba(15, 23, 42, .88) 100%);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .09), 0 30px 60px -24px rgba(0, 0, 0, .7), inset 0 1px 0 rgba(255, 255, 255, .06);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--ink-200);
  overflow: hidden;
}
.mock.mock-light { background: var(--white); -webkit-backdrop-filter: none; backdrop-filter: none; }
.mock-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, .07);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--ink-400);
}
.mock-bar .dots { display: inline-flex; gap: 6px; margin-right: 6px; }
.mock-bar .dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, .16); }
.mock-bar .tag {
  margin-left: auto;
  padding: 2px 8px;
  border-radius: var(--r-full);
  font-size: .6875rem;
  letter-spacing: .04em;
  color: var(--ink-400);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .14);
}
.mock-body { padding: 18px; }

.mock-q {
  margin-left: auto;
  max-width: 88%;
  width: fit-content;
  padding: 10px 14px;
  border-radius: 14px 14px 4px 14px;
  background: rgba(255, 255, 255, .08);
  color: var(--ink-100);
  font-size: .9375rem;
}
.mock-a { display: grid; grid-template-columns: 28px 1fr; gap: 12px; margin-top: 16px; }
.mock-a .avatar {
  width: 28px; height: 28px; border-radius: 8px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-500), var(--cyan-600));
  color: var(--white);
}
.mock-a .avatar svg { width: 16px; height: 16px; }
.mock-a p { font-size: .9375rem; line-height: 1.7; color: var(--ink-300); }
.mock-a p + p { margin-top: 6px; }
.mock-a .brand-hit {
  color: var(--white);
  font-weight: 700;
  background: linear-gradient(transparent 60%, rgba(16, 185, 129, .45) 60%);
  padding: 0 2px;
}
.cite {
  display: inline-grid;
  place-items: center;
  min-width: 18px; height: 18px;
  margin-left: 2px;
  padding: 0 4px;
  border-radius: 5px;
  background: rgba(52, 211, 153, .16);
  color: var(--brand-300);
  font-size: .6875rem;
  font-weight: 700;
  vertical-align: 2px;
}
.mock-sources { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; padding-left: 40px; }
.mock-sources span {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08);
  font-size: .75rem;
  color: var(--ink-300);
}
.mock-sources span b { color: var(--brand-300); font-weight: 700; }

.mock-kpi { padding: 16px 18px 18px; }
.mock-kpi .k-label { font-size: .8125rem; color: var(--ink-400); font-weight: 600; }
.mock-kpi .k-value { margin-top: 6px; display: flex; align-items: baseline; gap: 8px; color: var(--white); font-size: 1.75rem; font-weight: 800; letter-spacing: -0.03em; }
.mock-kpi .k-value small { font-size: .8125rem; font-weight: 700; color: var(--brand-300); letter-spacing: 0; }
.mock-kpi svg.spark { width: 100%; height: 64px; margin-top: 10px; overflow: visible; }
.mock-kpi .k-foot { display: flex; justify-content: space-between; margin-top: 6px; font-size: .6875rem; color: var(--ink-400); }

.scores { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 12px; }
.score { display: grid; justify-items: center; gap: 6px; font-size: .6875rem; color: var(--ink-400); text-align: center; line-height: 1.3; }
.ring { position: relative; width: 48px; height: 48px; }
.ring svg { width: 48px; height: 48px; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 4; }
.ring .track { stroke: rgba(52, 211, 153, .16); }
.ring .val { stroke: var(--brand-400); stroke-linecap: round; stroke-dasharray: 126 126; }
.ring b { position: absolute; inset: 0; display: grid; place-items: center; font-size: .8125rem; font-weight: 800; color: var(--brand-300); }

.mock-float {
  position: absolute;
  z-index: 2;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  border-radius: var(--r-full);
  background: var(--white);
  color: var(--ink-900);
  font-size: .8125rem;
  font-weight: 700;
  box-shadow: 0 12px 32px -12px rgba(0, 0, 0, .55);
}
.mock-float svg { width: 16px; height: 16px; color: var(--brand-600); }
.mock-float.f1 { bottom: -17px; left: 22px; }
.mock-ai { overflow: visible; z-index: 2; }
@media (max-width: 639px) {
  .mock-float, .mock-rank { display: none; }
  .hero-actions .btn { width: 100%; }
}

/* ==========================================================
   9. Logos / trust strip
   ========================================================== */
.trust-strip { border-bottom: 1px solid var(--border); background: var(--white); }
.trust-inner { display: grid; gap: 16px; padding-block: 28px; align-items: center; }
@media (min-width: 1024px) { .trust-inner { grid-template-columns: 220px 1fr; gap: 32px; } }
.trust-label { font-size: .875rem; font-weight: 700; color: var(--ink-500); line-height: 1.5; }
.trust-list { display: flex; flex-wrap: wrap; gap: 10px 28px; padding: 0; list-style: none; align-items: center; }
.trust-list li { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.0625rem; letter-spacing: -0.02em; color: var(--ink-500); transition: color .15s; }
.trust-list li:hover { color: var(--ink-800); }
.trust-list svg { width: 22px; height: 22px; }

/* ==========================================================
   10. Stats
   ========================================================== */
.stat-grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .stat-grid.cols-4 { grid-template-columns: repeat(4, 1fr); } .stat-grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.stat {
  position: relative;
  padding: 24px;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: 0 0 0 1px var(--border), var(--shadow-xs);
  display: flex;
  flex-direction: column;
}
.stat-num { font-size: clamp(2rem, 1.6rem + 1.4vw, 2.75rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.05; color: var(--ink-900); font-variant-numeric: tabular-nums; }
.stat-num .unit { font-size: .5em; font-weight: 800; margin-left: 2px; color: var(--brand-700); letter-spacing: -0.02em; }
.stat-label { margin-top: 10px; font-size: .9375rem; line-height: 1.55; color: var(--ink-600); flex: 1; }
.stat-src { margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--border); font-size: .75rem; line-height: 1.5; color: var(--ink-500); }
.stat-src a { color: var(--ink-500); text-decoration: underline; text-underline-offset: 2px; }
.stat-src a:hover { color: var(--brand-700); }
.section-dark .stat { background: rgba(255, 255, 255, .03); box-shadow: 0 0 0 1px rgba(255, 255, 255, .08); }
.section-dark .stat-num { color: var(--white); }
.section-dark .stat-num .unit { color: var(--brand-300); }
.section-dark .stat-label { color: var(--ink-300); }
.section-dark .stat-src { border-color: rgba(255, 255, 255, .1); color: var(--ink-500); }
.section-dark .stat-src a { color: var(--ink-400); }

.proof-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--border);
  box-shadow: 0 0 0 1px var(--border);
}
@media (min-width: 900px) { .proof-bar { grid-template-columns: repeat(4, 1fr); } }
.proof-bar > div { background: var(--white); padding: 22px 20px; }
.proof-bar b { display: block; font-size: 1.75rem; font-weight: 800; letter-spacing: -0.035em; color: var(--ink-900); line-height: 1.15; }
.proof-bar span { display: block; margin-top: 6px; font-size: .875rem; color: var(--ink-600); line-height: 1.5; }

/* ==========================================================
   11. Cards
   ========================================================== */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 1.2rem + .6vw, 32px);
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: 0 0 0 1px var(--border), var(--shadow-xs);
  color: var(--text);
  transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}
a.card:hover, .card.is-link:hover { color: var(--text); transform: translateY(-3px); box-shadow: 0 0 0 1px var(--brand-200), var(--shadow-md); }
.card h3 { font-size: 1.25rem; }
.card h3 + p, .card h3 + ul { margin-top: 10px; }
.card p { color: var(--ink-600); font-size: .9875rem; }
.card .card-foot { margin-top: auto; padding-top: 20px; }
.card-muted { background: var(--ink-50); box-shadow: 0 0 0 1px var(--border); }
.card-dark { background: var(--ink-900); color: var(--ink-300); box-shadow: 0 0 0 1px rgba(255, 255, 255, .06), var(--shadow-md); }
.card-dark h3, .card-dark strong { color: var(--white); }
.card-dark p { color: var(--ink-300); }

.icon-box {
  width: 48px; height: 48px;
  flex: none;
  border-radius: 14px;
  display: grid; place-items: center;
  margin-bottom: 20px;
  background: var(--brand-50);
  color: var(--brand-700);
  box-shadow: inset 0 0 0 1px var(--brand-100);
}
.icon-box svg { width: 24px; height: 24px; }
.icon-box.cyan { background: var(--cyan-50); color: var(--cyan-600); box-shadow: inset 0 0 0 1px #cffafe; }
.icon-box.amber { background: var(--amber-50); color: var(--amber-600); box-shadow: inset 0 0 0 1px #fef3c7; }
.icon-box.violet { background: var(--violet-50); color: var(--violet-600); box-shadow: inset 0 0 0 1px #ede9fe; }
.icon-box.dark { background: var(--ink-900); color: var(--brand-300); box-shadow: none; }

.check-list { list-style: none; padding: 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; font-size: .9875rem; line-height: 1.6; color: var(--ink-700); }
.check-list li::before {
  content: "";
  position: absolute; left: 0; top: .3em;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--brand-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23047857' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.section-dark .check-list li, .card-dark .check-list li { color: var(--ink-300); }
.section-dark .check-list li::before, .card-dark .check-list li::before { background-color: rgba(16, 185, 129, .2); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236ee7b7' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E"); }
.check-list.x li::before { background: var(--red-50) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23dc2626' stroke-width='3.2' stroke-linecap='round'%3E%3Cpath d='M18 6 6 18M6 6l12 12'/%3E%3C/svg%3E") center / 10px no-repeat; }

.service-card .service-tag { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.service-card .check-list { margin-top: 18px; }

.feature { display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-items: start; }
.feature .icon-box { margin: 0; }
.feature h3 { font-size: 1.125rem; }
.feature p { margin-top: 6px; color: var(--ink-600); font-size: .9875rem; }
.section-dark .feature p { color: var(--ink-400); }

/* Case cards */
.case-card { padding: 0; overflow: hidden; }
.case-card .case-top { padding: 24px 24px 0; display: flex; flex-wrap: wrap; gap: 6px; }
.case-card .case-body { padding: 16px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.case-card h3 { font-size: 1.1875rem; line-height: 1.4; }
.case-metric {
  display: flex; align-items: baseline; gap: 10px;
  margin: 16px 0 4px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--brand-50), var(--cyan-50));
  box-shadow: inset 0 0 0 1px var(--brand-100);
}
.case-metric b { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.03em; color: var(--brand-800); line-height: 1.2; }
.case-metric span { font-size: .875rem; color: var(--ink-600); line-height: 1.45; }
.case-rows { display: grid; gap: 12px; margin-top: 14px; }
.case-rows div { display: grid; grid-template-columns: 44px 1fr; gap: 10px; font-size: .9375rem; line-height: 1.6; color: var(--ink-700); }
.case-rows dt, .case-rows .k { font-size: .75rem; font-weight: 800; color: var(--ink-500); letter-spacing: .04em; padding-top: 3px; }
.case-rows dd { margin: 0; }
.case-stack { margin-top: auto; padding-top: 18px; display: flex; flex-wrap: wrap; gap: 6px; }
.case-stack span { font-size: .75rem; font-weight: 600; color: var(--ink-600); padding: 3px 8px; border-radius: 6px; background: var(--ink-100); }

/* Tool / screenshot cards */
.tool-card { padding: 0; overflow: hidden; }
.browser {
  position: relative;
  border-bottom: 1px solid var(--border);
  background: var(--ink-100);
}
.browser-bar { display: flex; align-items: center; gap: 6px; height: 30px; padding: 0 12px; background: var(--ink-100); border-bottom: 1px solid var(--border); }
.browser-bar i { width: 8px; height: 8px; border-radius: 50%; background: var(--ink-300); }
.browser-bar span { margin-left: 8px; font-size: .6875rem; color: var(--ink-500); font-family: var(--font-mono); }
.browser img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; background: var(--ink-50); }
.tool-card .tool-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.tool-card h3 { font-size: 1.125rem; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tool-card p { margin-top: 8px; font-size: .9375rem; }
.tool-card .tool-url { margin-top: auto; padding-top: 14px; font-size: .8125rem; font-weight: 700; color: var(--brand-700); font-family: var(--font-mono); }

/* Summary card that overlaps the bottom edge of a page hero */
.page-hero.has-overlap { padding-bottom: calc(clamp(48px, 3rem + 2.5vw, 88px) + 48px); }
.section.pt-0 { padding-top: 0; }
.proof-raised { position: relative; z-index: 2; margin-top: -48px; box-shadow: 0 0 0 1px var(--border), var(--shadow-md); }
.proof-raised + .section-head { margin-top: clamp(56px, 3rem + 2.5vw, 96px); }

/* Dashboard evidence (cases) */
.dash-group { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; font-size: 1.0625rem; }
.dash-group::after { content: ""; flex: 1; min-width: 24px; height: 1px; background: var(--border-strong); }
@media (max-width: 639px) { .dash-group { flex-wrap: wrap; gap: 8px 10px; } .dash-group::after { display: none; } }
.dash-grid { display: grid; gap: 20px; }
@media (min-width: 1100px) { .dash-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.dash-card, .dash-feature { border-radius: var(--r-lg); background: var(--white); box-shadow: 0 0 0 1px var(--border), var(--shadow-sm); overflow: hidden; }
.dash-card { display: flex; flex-direction: column; }
.dash-shot { display: block; background: var(--white); border-bottom: 1px solid var(--border); cursor: zoom-in; }
.dash-shot img { width: 100%; height: auto; }
.dash-card figcaption, .dash-feature figcaption { padding: 18px 22px 22px; }
.dash-src { font-size: .8125rem; font-weight: 700; color: var(--ink-500); }
.dash-metrics { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; padding: 0; list-style: none; }
.dash-metrics li { padding: 6px 12px; border-radius: 10px; background: var(--ink-50); box-shadow: inset 0 0 0 1px var(--border); font-size: .8125rem; color: var(--ink-600); }
.dash-metrics b { margin-right: 5px; font-size: 1rem; font-weight: 800; color: var(--ink-900); font-variant-numeric: tabular-nums; }
.dash-card figcaption p:not(.dash-src), .dash-feature figcaption p:not(.dash-src) { margin-top: 10px; font-size: .9375rem; line-height: 1.75; color: var(--ink-600); }
.dash-feature { display: grid; }
@media (min-width: 1024px) { .dash-feature { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); } }
.dash-feature-body { display: flex; flex-direction: column; justify-content: center; padding: clamp(22px, 1.2rem + 1vw, 36px); border-top: 1px solid var(--border); }
@media (min-width: 1024px) { .dash-feature-body { border-top: 0; border-left: 1px solid var(--border); } }
.dash-feature-body h3 { font-size: 1.25rem; }
.dash-feature-body .check-list { margin-top: 16px; }
.dash-note { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--border); font-size: .875rem; line-height: 1.65; color: var(--ink-500); }

.demo-strip {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  display: grid;
  gap: 16px 24px;
  align-items: center;
  padding: clamp(24px, 1.2rem + 1.2vw, 36px);
  border-radius: var(--r-lg);
  background: var(--ink-900);
  color: var(--ink-300);
}
.demo-strip::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 120% at 0% 0%, rgba(16, 185, 129, .22), transparent 70%); }
@media (min-width: 900px) { .demo-strip { grid-template-columns: auto minmax(0, 1fr) auto; } }
.demo-strip h3 { color: var(--white); font-size: 1.1875rem; line-height: 1.45; }
.demo-strip p { margin-top: 6px; font-size: .9375rem; line-height: 1.7; color: var(--ink-300); }
.demo-strip .btn { justify-self: start; }
.demo-ico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: rgba(16, 185, 129, .16); color: var(--brand-300); box-shadow: inset 0 0 0 1px rgba(52, 211, 153, .3); }
.demo-ico svg { width: 24px; height: 24px; }

/* ==========================================================
   12. Process / timeline
   ========================================================== */
.steps { display: grid; gap: 16px; counter-reset: step; list-style: none; padding: 0; }
@media (min-width: 768px) { .steps.cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .steps.cols-4 { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 900px) { .steps.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.step {
  position: relative;
  padding: 26px 24px 24px;
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: 0 0 0 1px var(--border), var(--shadow-xs);
  counter-increment: step;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  display: inline-grid; place-items: center;
  height: 28px; padding: 0 10px;
  border-radius: var(--r-full);
  background: var(--ink-900);
  color: var(--brand-300);
  font-size: .8125rem; font-weight: 800; letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}
.step h3 { margin-top: 16px; font-size: 1.125rem; }
.step .step-meta { margin-top: 4px; font-size: .8125rem; font-weight: 700; color: var(--brand-700); }
.step p { margin-top: 10px; font-size: .9375rem; color: var(--ink-600); }
.step ul { margin-top: 12px; padding-left: 18px; font-size: .9375rem; color: var(--ink-600); }
.step li + li { margin-top: 4px; }
.section-dark .step { background: rgba(255, 255, 255, .03); box-shadow: 0 0 0 1px rgba(255, 255, 255, .08); }
.section-dark .step::before { background: rgba(16, 185, 129, .16); }
.section-dark .step p, .section-dark .step ul { color: var(--ink-400); }
.section-dark .step .step-meta { color: var(--brand-300); }

.timeline { position: relative; display: grid; gap: 18px; padding: 0; list-style: none; }
.timeline li { position: relative; padding-left: 36px; }
.timeline li::before {
  content: ""; position: absolute; left: 7px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--white); box-shadow: 0 0 0 3px var(--brand-500);
}
.timeline li::after { content: ""; position: absolute; left: 12px; top: 26px; bottom: -18px; width: 2px; background: var(--brand-100); }
.timeline li:last-child::after { display: none; }
.timeline b { display: block; color: var(--ink-900); }
.timeline span { display: block; margin-top: 2px; font-size: .9375rem; color: var(--ink-600); }

/* ==========================================================
   13. Pricing
   ========================================================== */
.price-grid { display: grid; gap: 20px; }
@media (min-width: 860px) { .price-grid { grid-template-columns: repeat(2, 1fr); } }
.price-card { padding: clamp(24px, 1.4rem + 1vw, 40px); }
.price-card.featured { box-shadow: 0 0 0 2px var(--brand-500), var(--shadow-md); }
.price-card .ribbon { position: absolute; top: 20px; right: 20px; }
.price-card .plan { font-size: .8125rem; font-weight: 800; letter-spacing: .12em; color: var(--brand-700); text-transform: uppercase; }
.price-card h3 { margin-top: 8px; font-size: 1.5rem; }
.price-card .price { margin-top: 18px; display: flex; align-items: baseline; gap: 6px; font-size: clamp(2rem, 1.6rem + 1.2vw, 2.5rem); font-weight: 800; letter-spacing: -0.04em; color: var(--ink-900); }
.price-card .price small { font-size: 1rem; font-weight: 700; color: var(--ink-500); letter-spacing: 0; }
.price-card .price-note { margin-top: 6px; font-size: .875rem; font-weight: 700; color: var(--brand-700); }
.price-card .plan-meet { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; margin-top: 18px; padding: 12px 14px; border-radius: 10px; background: var(--brand-50); box-shadow: inset 0 0 0 1px var(--brand-100); font-size: .9375rem; color: var(--ink-700); }
.price-card .plan-meet svg { width: 18px; height: 18px; flex: none; color: var(--brand-700); }
.price-card .check-list { margin-top: 22px; }
.price-card .card-foot .btn { width: 100%; }

.days { display: grid; gap: 8px; margin-top: 20px; }
@media (min-width: 560px) { .days.d3 { grid-template-columns: repeat(3, 1fr); } }
.days.d7 { grid-template-columns: 1fr; }
@media (min-width: 560px) { .days.d7 { grid-template-columns: 1fr 1fr; grid-auto-flow: column; grid-template-rows: repeat(4, auto); } }
.days.d7 .day { display: flex; align-items: baseline; gap: 10px; padding: 8px 12px; }
.days.d7 .day b { flex: none; min-width: 40px; }
.days.d7 .day span { margin-top: 0; }
.day { padding: 10px 12px; border-radius: 10px; background: var(--ink-50); box-shadow: inset 0 0 0 1px var(--border); }
.day b { display: block; font-size: .6875rem; letter-spacing: .08em; color: var(--brand-700); }
.day span { display: block; margin-top: 2px; font-size: .8125rem; font-weight: 700; color: var(--ink-800); line-height: 1.4; }

/* ==========================================================
   14. Tables
   ========================================================== */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--r-lg);
  box-shadow: 0 0 0 1px var(--border);
  -webkit-overflow-scrolling: touch;
}
/* Edge shadows show that a wide table scrolls sideways; the "local" covers hide them at either end */
.table-wrap, .prose table {
  background:
    linear-gradient(90deg, var(--white) 30%, rgba(255, 255, 255, 0)) 0 0 / 32px 100% no-repeat local,
    linear-gradient(270deg, var(--white) 30%, rgba(255, 255, 255, 0)) 100% 0 / 32px 100% no-repeat local,
    radial-gradient(farthest-side at 0 50%, rgba(15, 23, 42, .18), rgba(15, 23, 42, 0)) 0 0 / 14px 100% no-repeat scroll,
    radial-gradient(farthest-side at 100% 50%, rgba(15, 23, 42, .18), rgba(15, 23, 42, 0)) 100% 0 / 14px 100% no-repeat scroll,
    var(--white);
}
.table { width: 100%; min-width: 620px; font-size: .9375rem; }
.table th, .table td { padding: 14px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
.table thead th { background: var(--ink-50); color: var(--ink-900); font-size: .8125rem; font-weight: 800; letter-spacing: .02em; white-space: nowrap; }
.table tbody tr:last-child > * { border-bottom: 0; }
.table tbody th { color: var(--ink-900); font-weight: 700; }
.table td { color: var(--ink-700); }
.table td small, .table th small { display: block; margin-top: 2px; color: var(--ink-500); font-weight: 500; font-size: .8125rem; }
.table .num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; font-weight: 700; color: var(--ink-900); }
.table .num.muted { color: var(--ink-300); font-weight: 500; }
.table .hl { background: var(--brand-50); }
.table-compare td:first-child, .table-compare th:first-child { width: 22%; }
.table caption { caption-side: bottom; padding: 12px 4px 0; text-align: left; font-size: .8125rem; color: var(--ink-500); }
/* Price tables become one card per row on phones so the price columns are never off-screen */
@media (max-width: 639px) {
  .table-price { min-width: 0; }
  .table-price thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .table-price tbody { display: block; }
  .table-price tr { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 10px; padding: 16px; border-bottom: 1px solid var(--border); }
  .table-price tbody tr:last-child { border-bottom: 0; }
  .table-price th, .table-price td { display: block; padding: 0; border: 0; }
  .table-price tbody th, .table-price td:not(.num) { grid-column: 1 / -1; }
  .table-price td:not(.num) { font-size: .875rem; line-height: 1.6; color: var(--ink-600); }
  .table-price .num { margin-top: 6px; padding: 8px 10px; border-radius: 10px; background: var(--ink-50); text-align: left; white-space: normal; }
  .table-price .num::before { display: block; margin-bottom: 2px; font-size: .6875rem; font-weight: 700; letter-spacing: .02em; color: var(--ink-500); }
  .table-price td:nth-of-type(2)::before { content: "One-time"; }
  .table-price td:nth-of-type(3)::before { content: "월 지속"; }
}

/* In-page navigation */
.page-nav { position: sticky; top: var(--header-h); z-index: 50; background: rgba(255, 255, 255, .92); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.page-nav .chip-list { padding-block: 12px; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
.page-nav .chip-list::-webkit-scrollbar { display: none; }
.page-nav .chip { white-space: nowrap; color: var(--ink-700); }
.page-nav .chip:hover { border-color: var(--brand-300); color: var(--brand-800); }

/* Pricing scenarios */
.scenario-summary { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-bottom: 32px; border-radius: var(--r-lg); overflow: hidden; background: var(--border); box-shadow: 0 0 0 1px var(--border); }
@media (min-width: 900px) { .scenario-summary { grid-template-columns: repeat(5, 1fr); } }
.scenario-summary a { display: block; padding: 18px 16px; background: var(--white); color: var(--ink-900); }
.scenario-summary a:hover { background: var(--brand-50); color: var(--ink-900); }
.scenario-summary small { display: block; font-size: .8125rem; font-weight: 700; color: var(--ink-500); }
.scenario-summary b { display: block; margin-top: 4px; font-size: 1.375rem; font-weight: 800; letter-spacing: -0.03em; }
.scenario-summary span { font-size: .8125rem; color: var(--ink-500); }
.scenario-list { display: grid; gap: 20px; }
.scenario { padding: 0; overflow: hidden; }
.scenario-head { display: grid; grid-template-columns: 44px 1fr; gap: 14px 16px; align-items: center; padding: 22px 24px; border-bottom: 1px solid var(--border); }
@media (min-width: 760px) { .scenario-head { grid-template-columns: 44px 1fr auto; } }
.scenario-letter { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--ink-900); color: var(--brand-300); font-weight: 800; font-size: 1.125rem; }
.scenario-head h3 { font-size: 1.1875rem; }
.scenario .scenario-head p { margin-top: 2px; font-size: .9375rem; color: var(--ink-600); }
.scenario-total { grid-column: 1 / -1; text-align: left; }
@media (min-width: 760px) { .scenario-total { grid-column: auto; text-align: right; } }
.scenario .scenario-total small { display: block; font-size: .8125rem; font-weight: 700; color: var(--ink-500); }
.scenario-total b { font-size: 1.625rem; font-weight: 800; letter-spacing: -0.03em; color: var(--ink-900); }
.scenario-cols { display: grid; }
@media (min-width: 760px) { .scenario-cols { grid-template-columns: 1fr 1fr; } .scenario-cols > div + div { border-left: 1px solid var(--border); } }
.scenario-cols > div { padding: 20px 24px; }
@media (max-width: 759px) { .scenario-cols > div + div { border-top: 1px solid var(--border); } }
.scenario .col-title { font-size: .8125rem; font-weight: 800; letter-spacing: .06em; color: var(--brand-700); margin-bottom: 8px; }
.lines div { display: flex; justify-content: space-between; gap: 16px; padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: .9375rem; }
.lines dt { color: var(--ink-600); }
.lines dd { margin: 0; font-weight: 700; color: var(--ink-900); white-space: nowrap; font-variant-numeric: tabular-nums; }
.scenario .subtotal { display: flex; justify-content: space-between; margin-top: 12px; font-weight: 800; color: var(--ink-900); }
.subtotal b { font-variant-numeric: tabular-nums; }
.scenario .deduct { margin-top: 4px; font-size: .875rem; font-weight: 700; color: var(--brand-700); }
.scenario .deduct.muted { color: var(--ink-500); font-weight: 600; }
.scenario .deduct span { font-weight: 600; color: var(--ink-500); }
.scenario .scenario-foot { padding: 14px 24px; background: var(--ink-50); border-top: 1px solid var(--border); font-size: .875rem; font-weight: 700; color: var(--ink-700); }

.table.table-fit { min-width: 0; }
.table-note { margin: 10px 4px 0; font-size: .8125rem; line-height: 1.6; color: var(--ink-500); }
.myth .myth-q { margin-bottom: 10px; font-size: 1.0625rem; font-weight: 800; line-height: 1.5; color: var(--ink-900); }
.myth p + p { font-size: .9375rem; line-height: 1.75; }
.myth strong { color: var(--brand-800); }

/* Links inside running text must not rely on color alone */
p a:not(.btn):not(.link-arrow), .callout a, .faq .answer a, .table-note a, .author-box a, .stat-src a, .check-list a, .consent a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ==========================================================
   15. FAQ (native details)
   ========================================================== */
.faq { display: grid; gap: 12px; }
.faq details {
  border-radius: var(--r-md);
  background: var(--white);
  box-shadow: 0 0 0 1px var(--border);
  transition: box-shadow .15s var(--ease);
}
.faq details[open] { box-shadow: 0 0 0 1px var(--brand-200), var(--shadow-sm); }
.faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--ink-900);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  flex: none;
  width: 24px; height: 24px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--ink-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M12 6v12M6 12h12'/%3E%3C/svg%3E") center / 14px no-repeat;
  transition: transform .2s var(--ease), background-color .2s;
}
.faq details[open] summary::after { transform: rotate(45deg); background-color: var(--brand-100); }
.faq .answer { padding: 0 22px 22px; color: var(--ink-600); font-size: 1rem; line-height: 1.8; }
.faq .answer p + p, .faq .answer p + ul, .faq .answer ul + p { margin-top: 10px; }
.faq .answer ul { padding-left: 20px; }

/* ==========================================================
   16. Callouts
   ========================================================== */
.callout {
  position: relative;
  padding: 20px 22px;
  border-radius: var(--r-md);
  background: var(--ink-50);
  box-shadow: inset 0 0 0 1px var(--border);
  font-size: .9875rem;
  color: var(--ink-700);
}
.callout > * + * { margin-top: 8px; }
.callout-title { display: flex; align-items: center; gap: 8px; font-weight: 800; color: var(--ink-900); }
.callout-title svg { width: 18px; height: 18px; }
.callout.is-brand { background: var(--brand-50); box-shadow: inset 0 0 0 1px var(--brand-200); }
.callout.is-brand .callout-title { color: var(--brand-800); }
.callout.is-amber { background: var(--amber-50); box-shadow: inset 0 0 0 1px #fde68a; }
.callout.is-amber .callout-title { color: #92400e; }
.callout.is-dark { background: var(--ink-900); color: var(--ink-300); box-shadow: none; }
.callout.is-dark .callout-title, .callout.is-dark strong { color: var(--white); }
.callout.is-white { background: var(--white); }

.quote-block {
  padding: clamp(24px, 2vw, 36px);
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--ink-900) 0%, #0b2a24 100%);
  color: var(--ink-300);
  box-shadow: var(--shadow-lg);
}
.quote-block p { font-size: clamp(1.0625rem, 1rem + .4vw, 1.3125rem); line-height: 1.75; color: var(--ink-200); }
.quote-block strong { color: var(--brand-300); }
.quote-block .who { margin-top: 18px; font-size: .9375rem; color: var(--ink-400); }

/* ==========================================================
   17. CTA band
   ========================================================== */
.cta-band {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--r-xl);
  padding: clamp(36px, 2rem + 3vw, 72px) clamp(24px, 1rem + 4vw, 72px);
  background: var(--ink-950);
  color: var(--ink-300);
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(50% 80% at 0% 0%, rgba(16, 185, 129, .28), transparent 70%),
    radial-gradient(40% 70% at 100% 100%, rgba(34, 211, 238, .18), transparent 70%);
}
.cta-band h2 { color: var(--white); max-width: 760px; }
.cta-band p:not(.eyebrow) { margin-top: 14px; max-width: 640px; color: var(--ink-300); font-size: 1.0625rem; }
.cta-band .btn-row { margin-top: 28px; }
.cta-band .cta-points { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 22px; padding: 0; list-style: none; font-size: .875rem; color: var(--ink-400); }
.cta-band .cta-points li::before { content: "✓"; margin-right: 6px; color: var(--brand-400); font-weight: 800; }

/* ==========================================================
   18. Footer
   ========================================================== */
.site-footer { background: var(--ink-950); color: var(--ink-400); padding-top: clamp(56px, 4rem + 2vw, 88px); font-size: .9375rem; }
.footer-top { display: grid; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
@media (min-width: 900px) { .footer-top { grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; } }
.footer-brand p { margin-top: 16px; max-width: 360px; line-height: 1.75; color: var(--ink-400); }
.footer-brand .btn { margin-top: 22px; }
.footer-title { font-size: .8125rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-200); margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; display: grid; gap: 0; }
.footer-col a { display: inline-block; padding: 5px 0; color: var(--ink-400); }
.footer-col a:hover { color: var(--white); }
.footer-col .ext::after { content: " ↗"; font-size: .8em; opacity: .6; }
.footer-bottom { display: grid; gap: 16px; padding-block: 28px 36px; font-size: .8125rem; line-height: 1.8; color: var(--ink-400); }
@media (min-width: 900px) { .footer-bottom { grid-template-columns: 1fr auto; align-items: end; } }
.footer-bottom address { font-style: normal; }
.footer-bottom a { color: var(--ink-300); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(255, 255, 255, .3); }
.footer-bottom a:hover { color: var(--white); }
.footer-legal { display: flex; flex-wrap: wrap; gap: 0 18px; }
.footer-legal a { display: inline-block; padding: 5px 0; }

/* ==========================================================
   19. Forms
   ========================================================== */
.form-card {
  padding: clamp(22px, 1.2rem + 1.4vw, 40px);
  border-radius: var(--r-xl);
  background: var(--white);
  box-shadow: 0 0 0 1px var(--border), var(--shadow-md);
}
.form-grid { display: grid; gap: 20px; }
.form-grid .col-2 { display: grid; gap: 20px; }
@media (min-width: 640px) { .form-grid .col-2 { grid-template-columns: 1fr 1fr; } }
.field label, .field legend { display: block; margin-bottom: 8px; font-size: .9375rem; font-weight: 700; color: var(--ink-900); }
.field .req { color: var(--red-600); margin-left: 2px; }
.field .hint { margin-top: 6px; font-size: .8125rem; color: var(--ink-500); }
.input, .select, .textarea {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-strong);
  background: var(--white);
  color: var(--ink-900);
  font-size: 1rem;
  line-height: 1.5;
  transition: border-color .15s, box-shadow .15s;
}
.input::placeholder, .textarea::placeholder { color: var(--ink-400); }
.input:hover, .select:hover, .textarea:hover { border-color: var(--ink-400); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--brand-600); box-shadow: 0 0 0 4px rgba(16, 185, 129, .18); }
.textarea { min-height: 160px; resize: vertical; }
.select {
  appearance: none;
  padding-right: 42px;
  background: var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") right 14px center / 18px no-repeat;
}
fieldset.field { border: 0; padding: 0; min-width: 0; }
.choice-group { display: flex; flex-wrap: wrap; gap: 8px; }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.choice span {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 42px; padding: 8px 14px;
  border-radius: var(--r-full);
  border: 1px solid var(--border-strong);
  background: var(--white);
  font-size: .9375rem; font-weight: 600; color: var(--ink-700);
  cursor: pointer; user-select: none;
  transition: all .15s var(--ease);
}
.choice span:hover { border-color: var(--ink-400); }
.choice input:checked + span { border-color: var(--brand-600); background: var(--brand-50); color: var(--brand-800); box-shadow: inset 0 0 0 1px var(--brand-600); }
.choice input:checked + span::before { content: "✓"; font-weight: 800; }
.choice input:focus-visible + span { outline: 3px solid var(--brand-400); outline-offset: 2px; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: .875rem; color: var(--ink-600); line-height: 1.6; }
.consent input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--brand-600); flex: none; }
.alert { padding: 16px 18px; border-radius: var(--r-md); font-size: .9375rem; line-height: 1.65; }
.alert-success { background: var(--brand-50); color: var(--brand-900); box-shadow: inset 0 0 0 1px var(--brand-200); }
.alert-error { background: var(--red-50); color: #991b1b; box-shadow: inset 0 0 0 1px #fecaca; }
.spinner { display: inline-block; width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.contact-layout { display: grid; gap: 32px; align-items: start; }
@media (min-width: 1024px) { .contact-layout { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 40px; } .contact-aside { position: sticky; top: calc(var(--header-h) + 24px); } }
.contact-aside > * + * { margin-top: 16px; }
.info-list { list-style: none; padding: 0; display: grid; gap: 14px; }
.info-list li { display: grid; grid-template-columns: 40px 1fr; gap: 12px; align-items: start; }
.info-list .icon-box { width: 40px; height: 40px; border-radius: 12px; margin: 0; }
.info-list .icon-box svg { width: 20px; height: 20px; }
.info-list b { display: block; color: var(--ink-900); font-size: .9875rem; }
.info-list span:not(.icon-box) { display: block; font-size: .875rem; color: var(--ink-600); line-height: 1.6; }

/* ==========================================================
   20. Article / guide
   ========================================================== */
.article-hero .part-kicker {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 18px;
  font-size: .875rem; font-weight: 800; letter-spacing: .08em;
  color: var(--brand-300);
}
.article-hero .part-kicker span { padding: 3px 10px; border-radius: var(--r-full); background: rgba(16, 185, 129, .14); box-shadow: inset 0 0 0 1px rgba(52, 211, 153, .3); }
.article-hero h1 { margin-top: 12px; }

.byline {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 10px 20px;
  margin-top: 26px;
  font-size: .875rem;
  color: var(--ink-400);
}
.byline .author { display: inline-flex; align-items: center; gap: 10px; color: var(--ink-200); font-weight: 700; }
.byline .author:hover { color: var(--white); }
.byline .avatar {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-500), var(--cyan-600));
  color: var(--white); font-weight: 800; font-size: .875rem;
}
.byline .author small { display: block; font-weight: 500; color: var(--ink-400); font-size: .75rem; line-height: 1.3; }
.byline .meta { display: inline-flex; align-items: center; gap: 6px; }
.byline .meta svg { width: 16px; height: 16px; opacity: .7; }

.article-layout { display: grid; gap: 40px; padding-block: clamp(40px, 3rem + 1vw, 72px); }
@media (min-width: 1100px) {
  .article-layout { grid-template-columns: minmax(0, 1fr) 280px; gap: 64px; }
}
.article-main { min-width: 0; max-width: 780px; }
.article-aside { display: none; }
@media (min-width: 1100px) {
  .article-aside { display: block; }
  .article-aside .sticky { position: sticky; top: calc(var(--header-h) + 28px); display: grid; gap: 20px; }
  .article-aside .toc { max-height: calc(100vh - var(--header-h) - 300px); min-height: 220px; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
}

.toc { padding: 20px; border-radius: var(--r-lg); background: var(--ink-50); box-shadow: inset 0 0 0 1px var(--border); }
.toc-title { font-size: .75rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-500); margin-bottom: 12px; }
.toc ol, .toc ul { list-style: none; padding: 0; display: grid; gap: 2px; }
.toc a {
  display: block;
  padding: 6px 10px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  font-size: .875rem;
  line-height: 1.5;
  color: var(--ink-600);
}
.toc a:hover { color: var(--ink-900); background: var(--white); }
.toc a.is-active { color: var(--brand-800); background: var(--white); border-left-color: var(--brand-500); font-weight: 700; }
.toc-mobile { margin-bottom: 32px; }
.toc-mobile summary { cursor: pointer; font-weight: 800; color: var(--ink-900); list-style: none; display: flex; justify-content: space-between; align-items: center; }
.toc-mobile summary::-webkit-details-marker { display: none; }
.toc-mobile summary::after { content: "+"; font-size: 1.25rem; color: var(--ink-500); }
.toc-mobile[open] summary::after { content: "−"; }
.toc-mobile[open] summary { margin-bottom: 10px; }
@media (min-width: 1100px) { .toc-mobile { display: none; } }

.aside-cta { padding: 22px; border-radius: var(--r-lg); background: var(--ink-950); color: var(--ink-300); box-shadow: var(--shadow-md); position: relative; overflow: hidden; isolation: isolate; }
.aside-cta::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(80% 60% at 0% 0%, rgba(16, 185, 129, .3), transparent 70%); }
.aside-cta b { display: block; color: var(--white); font-size: 1.0625rem; line-height: 1.45; }
.aside-cta p { margin-top: 8px; font-size: .875rem; color: var(--ink-400); line-height: 1.65; }
.aside-cta .btn { margin-top: 16px; width: 100%; }

/* TL;DR */
.tldr {
  margin-bottom: 36px;
  padding: 22px 24px;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--brand-50) 0%, #f0fdfa 100%);
  box-shadow: inset 0 0 0 1px var(--brand-200);
}
.tldr-title { display: flex; align-items: center; gap: 8px; font-size: .8125rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--brand-800); }
.tldr-title svg { width: 18px; height: 18px; }
.tldr ul { margin-top: 12px; padding-left: 20px; display: grid; gap: 6px; }
.tldr li { color: var(--ink-800); font-size: 1rem; line-height: 1.7; }
.tldr li::marker { color: var(--brand-600); }

/* Prose */
.prose { font-size: 1.0625rem; line-height: 1.85; color: var(--ink-700); }
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  margin-top: 2.6em;
  padding-top: .9em;
  border-top: 1px solid var(--border);
  font-size: clamp(1.5rem, 1.2rem + 1vw, 1.875rem);
  line-height: 1.35;
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.prose > h2:first-child, .prose > .tldr + h2, .prose > p:first-child + h2 { border-top: 0; padding-top: 0; }
.prose > .eyebrow + h2 { margin-top: 0; border-top: 0; padding-top: 0; }
.prose > .eyebrow { margin-bottom: 0; }
.prose h3 { margin-top: 2em; font-size: clamp(1.1875rem, 1.1rem + .4vw, 1.3125rem); line-height: 1.45; scroll-margin-top: calc(var(--header-h) + 24px); }
.prose h4 { margin-top: 1.6em; font-size: 1.0625rem; line-height: 1.5; }
.prose h2 + *, .prose h3 + *, .prose h4 + * { margin-top: .7em; }
.prose a:not(.btn) { color: var(--brand-700); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--brand-300); }
.prose a:not(.btn):hover { text-decoration-color: currentColor; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: .4em; }
.prose li > ul, .prose li > ol { margin-top: .4em; }
.prose li::marker { color: var(--ink-400); }
.prose ol > li::marker { font-weight: 700; color: var(--ink-500); }
.prose blockquote { padding: 4px 0 4px 20px; border-left: 3px solid var(--brand-400); color: var(--ink-600); font-style: normal; }
.prose code { padding: .15em .4em; border-radius: 6px; background: var(--ink-100); color: var(--ink-900); font-size: .875em; word-break: break-word; }
.prose pre { padding: 18px 20px; border-radius: var(--r-md); background: var(--ink-900); color: var(--ink-200); font-size: .875rem; line-height: 1.7; overflow-x: auto; }
.prose pre code { padding: 0; background: none; color: inherit; font-size: inherit; word-break: normal; }
.prose img { border-radius: var(--r-md); }
.prose table { width: 100%; font-size: .9375rem; line-height: 1.6; display: block; overflow-x: auto; border-radius: var(--r-md); box-shadow: 0 0 0 1px var(--border); }
.prose th, .prose td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.prose thead th { background: var(--ink-50); color: var(--ink-900); font-weight: 800; font-size: .875rem; white-space: nowrap; }
.prose tbody tr:last-child td { border-bottom: 0; }
.prose hr { margin: 2.5em 0; }
.prose .table-wrap table { display: table; box-shadow: none; border-radius: 0; background: none; }
@media (max-width: 640px) {
  .prose .table-wrap table { min-width: 600px; font-size: .875rem; }
  .prose th, .prose td { padding: 10px 12px; }
}

/* Legacy guide blocks (kept for existing content) */
.highlight-box, .section-box, .reader-type, .code-block { margin-block: 1.6em; }
.highlight-box {
  padding: 22px 24px;
  border-radius: var(--r-lg);
  background: var(--ink-900);
  color: var(--ink-300);
}
.highlight-box p, .highlight-box li { color: var(--ink-300); }
.highlight-box h3, .highlight-box h4, .highlight-box h5 { color: var(--white); margin-top: 0; }
.highlight-box a { color: var(--brand-300); }
.highlight-box strong { color: var(--white); }
.highlight-box ul, .highlight-box ol { margin-top: 10px; }
.highlight-box code { background: rgba(255, 255, 255, .1); color: var(--brand-200); }
.section-box { padding: 22px 24px; border-radius: var(--r-lg); background: var(--ink-50); box-shadow: inset 0 0 0 1px var(--border); }
.section-box > :first-child { margin-top: 0; }
.section-box h3, .section-box h4 { margin-top: 0; font-size: 1.0625rem; }
.section-box ul, .section-box ol { margin-top: 10px; }
.reader-type { padding: 20px 22px; border-radius: var(--r-lg); background: var(--white); box-shadow: inset 0 0 0 1px var(--border); }
.reader-type h3, .reader-type h4 { margin-top: 0; display: flex; align-items: center; gap: 8px; font-size: 1.0625rem; }
.reader-type .emoji { font-size: 1.25rem; }
.reader-type ul { margin-top: 10px; }
.code-block { border-radius: var(--r-md); overflow: hidden; background: var(--ink-900); }
.code-block-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 14px; background: var(--ink-800); color: var(--ink-400); font-family: var(--font-mono); font-size: .75rem; }
.code-block pre { margin: 0; border-radius: 0; }
.copy-btn { min-height: 32px; padding: 4px 12px; border-radius: 6px; border: 1px solid rgba(255, 255, 255, .15); background: rgba(255, 255, 255, .05); color: var(--ink-300); font-size: .6875rem; font-family: var(--font-sans); font-weight: 700; }
.copy-btn:hover { background: rgba(255, 255, 255, .12); color: var(--white); }
.subsection-marker { display: inline-block; margin-right: 8px; padding: 1px 8px; border-radius: 6px; background: var(--ink-100); color: var(--ink-700); font-size: .75rem; font-weight: 800; vertical-align: 2px; }

.sources { margin-top: 3em; padding: 20px 22px; border-radius: var(--r-md); background: var(--ink-50); box-shadow: inset 0 0 0 1px var(--border); font-size: .875rem; line-height: 1.7; }
.sources h2, .sources h3 { margin: 0 0 8px; padding: 0; border: 0; font-size: .9375rem; }
.sources ol { padding-left: 1.3em; color: var(--ink-600); }
.sources li + li { margin-top: 4px; }
.sources a { overflow-wrap: anywhere; }

.article-nav { display: grid; gap: 12px; margin-top: 56px; }
@media (min-width: 640px) { .article-nav { grid-template-columns: 1fr 1fr; } }
.article-nav a {
  display: block;
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: var(--white);
  box-shadow: 0 0 0 1px var(--border);
  color: var(--ink-900);
  font-weight: 700;
  line-height: 1.45;
}
.article-nav a:hover { box-shadow: 0 0 0 1px var(--brand-300), var(--shadow-sm); color: var(--ink-900); }
.article-nav a small { display: block; margin-bottom: 4px; font-size: .75rem; font-weight: 800; letter-spacing: .08em; color: var(--ink-500); }
.article-nav .next { text-align: right; }
.article-nav .next:only-child { grid-column: 2; }

.author-box { display: grid; grid-template-columns: 56px 1fr; gap: 16px; margin-top: 48px; padding: 22px; border-radius: var(--r-lg); background: var(--ink-50); box-shadow: inset 0 0 0 1px var(--border); }
.author-box .avatar { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg, var(--brand-500), var(--cyan-600)); color: var(--white); font-weight: 800; font-size: 1.25rem; }
.author-box b { color: var(--ink-900); }
.author-box p { margin-top: 6px; font-size: .9375rem; color: var(--ink-600); line-height: 1.7; }

.author-box.author-inline { margin-top: 0; padding: 0; background: none; box-shadow: none; }
.info-table { display: grid; gap: 0; }
.info-table div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--border); font-size: .9375rem; line-height: 1.6; }
.info-table div:last-child { border-bottom: 0; }
.info-table dt { color: var(--ink-500); font-weight: 600; }
.info-table dd { margin: 0; color: var(--ink-900); font-weight: 600; }
.card-dark .tool-url { margin-top: auto; padding-top: 16px; font-size: .8125rem; font-weight: 700; color: var(--brand-300); font-family: var(--font-mono); }

/* Guide index */
.part-grid { display: grid; gap: 16px; }
@media (min-width: 700px) { .part-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .part-grid { grid-template-columns: repeat(3, 1fr); } }
.part-card { padding: 24px; }
.part-card .part-no { display: flex; justify-content: space-between; align-items: center; font-size: .8125rem; font-weight: 800; letter-spacing: .1em; color: var(--brand-700); }
.part-card .part-no span:last-child { font-weight: 600; letter-spacing: 0; color: var(--ink-500); }
.part-card h3 { margin-top: 12px; font-size: 1.1875rem; line-height: 1.45; }
.part-card p { margin-top: 8px; font-size: .9375rem; }
.part-card .card-foot { padding-top: 16px; }

/* ==========================================================
   21. Misc
   ========================================================== */
.error-page { min-height: 60vh; display: grid; place-items: center; text-align: center; }
.error-code { font-size: clamp(5rem, 4rem + 6vw, 9rem); font-weight: 900; letter-spacing: -0.06em; line-height: 1; }

.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .site-footer, .cta-band, .article-aside, .toc-mobile, .aside-cta, .nav-toggle { display: none !important; }
  .hero, .section-dark { background: none !important; color: #000 !important; }
  .hero h1, .hero .lead { color: #000 !important; }
  a { color: #000; text-decoration: underline; }
}