/* ============================================================
   Akaritma — Quantitative Reasoning & Pure Mathematics Clinic
   Design system: "Precision Academic & Analytical Boutique"
   ============================================================ */

:root {
  --bg-primary: #FAFAFA;
  --bg-surface: #FFFFFF;
  --bg-subtle: #F4F4F5;
  --bg-dark: #09090B;

  --text-primary: #09090B;
  --text-secondary: #52525B;
  --text-muted: #71717A;

  --accent-primary: #1E3A8A;
  --accent-vibrant: #2563EB;
  --accent-emerald: #059669;
  --accent-amber: #D97706;

  --border-subtle: #E4E4E7;
  --border-focus: #2563EB;

  --font-sans: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(9, 9, 11, 0.06);
  --shadow-md: 0 8px 24px rgba(9, 9, 11, 0.08);
  --shadow-lg: 0 24px 60px rgba(9, 9, 11, 0.12);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-secondary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--accent-vibrant); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--text-primary); line-height: 1.15; letter-spacing: -0.03em; margin: 0 0 0.6em; font-weight: 800; }
p { margin: 0 0 1em; }
strong { color: var(--text-primary); }
em { font-style: italic; }

.mono { font-family: var(--font-mono); font-weight: 500; letter-spacing: 0; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent-vibrant); color: #fff;
  padding: 10px 16px; border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100; font-weight: 600;
}
.skip-link:focus { left: 0; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-sans); font-size: 15px; font-weight: 700;
  padding: 12px 20px; border-radius: var(--radius-sm);
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  text-decoration: none; line-height: 1.2; white-space: normal;
}
.btn:hover { text-decoration: none; }
.btn--lg { font-size: 16px; padding: 15px 26px; }
.btn--sm { font-size: 14px; padding: 9px 16px; }
.btn--primary { background: var(--accent-vibrant); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: #1d4ed8; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--outline { background: transparent; color: var(--accent-primary); border-color: var(--accent-primary); }
.btn--outline:hover { background: rgba(30, 58, 138, 0.06); }
.btn--on-dark { background: #fff; color: var(--text-primary); }
.btn--on-dark:hover { background: #f4f4f5; transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* ---------- Section scaffolding ---------- */
.section { padding: 88px 0; }
.section--subtle { background: var(--bg-subtle); }
.eyebrow {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  letter-spacing: 0.08em; color: var(--accent-vibrant);
  text-transform: uppercase; margin: 0 0 16px;
}
.section-title { font-size: clamp(28px, 4.4vw, 44px); max-width: 18ch; }
.section-lead { font-size: 18px; max-width: 62ch; }

/* ============================================================
   SECTION 1: NAVBAR
============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 250, 250, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(228, 228, 231, 0.7);
}
.header-inner { display: flex; align-items: center; gap: 24px; min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand__logo { height: 30px; width: auto; border-radius: 6px; }
.brand__pill {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; color: var(--accent-primary);
  border: 1px solid var(--border-subtle); background: var(--bg-surface);
  padding: 5px 9px; border-radius: 999px; white-space: nowrap;
}
.nav { flex: 1 1 auto; display: flex; justify-content: center; }
.nav__list { display: flex; gap: 6px; list-style: none; margin: 0; padding: 0; }
.nav__list a {
  display: block; padding: 8px 12px; font-size: 14px; font-weight: 600;
  color: var(--text-secondary); border-radius: var(--radius-sm);
}
.nav__list a:hover { color: var(--text-primary); background: rgba(9, 9, 11, 0.05); text-decoration: none; }
.header-tools { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }

.burger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; padding: 10px;
  background: transparent; border: 1px solid var(--border-subtle); border-radius: var(--radius-sm);
  cursor: pointer;
}
.burger span { display: block; height: 2px; background: var(--text-primary); border-radius: 2px; }

/* ============================================================
   SECTION 2: HERO
============================================================ */
.hero { padding: 96px 0 72px; border-bottom: 1px solid var(--border-subtle); }
.bg-math-grid {
  background-color: var(--bg-primary);
  background-size: 32px 32px;
  background-image:
    linear-gradient(to right, rgba(24, 24, 27, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24, 24, 27, 0.04) 1px, transparent 1px);
}
.hero-inner { max-width: 880px; margin: 0 auto; text-align: center; }
.hero__status {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.02em; color: var(--text-secondary);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  padding: 8px 14px; border-radius: 999px; margin: 0 0 28px;
}
.hero__status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-emerald); flex: none;
  box-shadow: 0 0 0 4px rgba(5, 150, 105, 0.16);
}
.hero__title { font-size: clamp(34px, 6.4vw, 62px); max-width: 20ch; margin-left: auto; margin-right: auto; }
.hero__lead { font-size: clamp(17px, 2.2vw, 20px); max-width: 62ch; margin-left: auto; margin-right: auto; }
.hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin: 32px 0 56px; }

.hero__metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  text-align: left; margin: 0;
}
.metric {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 20px 18px; box-shadow: var(--shadow-sm);
}
.metric__value {
  display: block; font-family: var(--font-mono); font-size: 17px; font-weight: 700;
  color: var(--accent-primary); margin-bottom: 8px; letter-spacing: -0.02em;
}
.metric__label { font-size: 13px; color: var(--text-muted); line-height: 1.45; }

/* ============================================================
   SECTION 3: COMPARISON MATRIX
============================================================ */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 40px; }
.compare-card {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 30px 28px;
}
.compare-card--featured {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px var(--accent-primary), 0 18px 48px rgba(30, 58, 138, 0.14);
}
.compare-card__title { font-size: 21px; margin-bottom: 18px; }
.compare-list { list-style: none; margin: 0; padding: 0; }
.compare-list li {
  position: relative; padding: 12px 0 12px 24px;
  border-top: 1px solid var(--border-subtle); font-size: 15.5px;
}
.compare-list li:first-child { border-top: 0; padding-top: 0; }
.compare-list li::before {
  content: ""; position: absolute; left: 2px; top: 21px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent-vibrant);
}
.compare-card--muted .compare-list li::before { background: var(--text-muted); }
.compare-list li:first-child::before { top: 9px; }

/* ============================================================
   SECTION 4: PROGRAMS
============================================================ */
.format-note {
  display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 28px;
}
.format-note__item {
  font-size: 14px; font-weight: 600; color: var(--accent-primary);
  background: rgba(37, 99, 235, 0.08); border: 1px solid rgba(37, 99, 235, 0.22);
  padding: 8px 14px; border-radius: 999px;
}

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.card {
  display: flex; flex-direction: column;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 28px 26px; box-shadow: var(--shadow-sm);
}
.card--featured {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px var(--accent-primary), 0 18px 48px rgba(30, 58, 138, 0.14);
}
.card__badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.badge {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600; letter-spacing: 0.03em;
  padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border-subtle);
  background: var(--bg-subtle); color: var(--text-secondary);
}
.badge--segment { border-color: var(--border-subtle); }
.badge--cap { border-width: 1px; }
.badge--emerald { color: var(--accent-emerald); border-color: rgba(5, 150, 105, 0.4); background: rgba(5, 150, 105, 0.08); }
.badge--blue { color: var(--accent-vibrant); border-color: rgba(37, 99, 235, 0.4); background: rgba(37, 99, 235, 0.08); }
.badge--amber { color: var(--accent-amber); border-color: rgba(217, 119, 6, 0.4); background: rgba(217, 119, 6, 0.1); }

.card__title { font-size: 22px; }
.card__tagline { font-size: 15px; }
.card__time { font-size: 14.5px; color: var(--text-secondary); }
.card__sub {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted);
  margin: 14px 0 10px;
}
.check-list { list-style: none; margin: 0; padding: 0; }
.check-list li { position: relative; padding: 0 0 10px 26px; font-size: 14.5px; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--accent-emerald); font-weight: 800;
}
.card__cta { display: flex; flex-direction: column; gap: 10px; margin-top: auto; padding-top: 22px; }

/* Comparison strip */
.compare-strip {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 36px;
}
.compare-strip__item {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 26px 24px;
}
.compare-strip__title { font-size: 18px; }
.compare-strip__item p { margin: 0; font-size: 15px; }

/* ============================================================
   SECTION 5: METHOD & DECONSTRUCTION WIDGET
============================================================ */
.timeline { list-style: none; margin: 40px 0 0; padding: 0; position: relative; }
.timeline::before {
  content: ""; position: absolute; left: 130px; top: 8px; bottom: 8px;
  width: 2px; background: var(--border-subtle);
}
.timeline__item { display: grid; grid-template-columns: 118px 1fr; gap: 28px; padding: 0 0 30px; position: relative; }
.timeline__time {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600; color: var(--accent-primary);
  text-align: right; padding-top: 2px;
}
.timeline__body h3 { font-size: 19px; margin-bottom: 6px; }
.timeline__body p { margin: 0; font-size: 15.5px; }

/* Deconstruction widget */
.deconstruct {
  margin-top: 64px; background: var(--bg-surface);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: 34px 32px; box-shadow: var(--shadow-md);
}
.deconstruct__head { margin-bottom: 26px; }
.deconstruct__title { font-size: 24px; }
.deconstruct__sub { font-size: 15.5px; margin: 0; }

.deconstruct__problem {
  background: var(--bg-subtle); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 20px 22px; margin-bottom: 22px;
}
.deconstruct__problem-label {
  display: block; font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--accent-primary); margin-bottom: 10px;
}
.deconstruct__problem p { margin: 0; font-size: 16px; color: var(--text-primary); }

.tabs { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.tab {
  flex: 1; min-width: 240px;
  font-family: var(--font-sans); font-size: 15px; font-weight: 700;
  padding: 13px 16px; border-radius: var(--radius-sm); cursor: pointer;
  border: 1.5px solid var(--border-subtle); background: var(--bg-surface); color: var(--text-secondary);
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.tab:hover { border-color: var(--border-focus); }
.tab.is-active { border-color: var(--border-focus); background: #fff; }
.tab--bad.is-active { border-color: #dc2626; color: #991b1b; background: #fef2f2; }
.tab--good.is-active { border-color: var(--accent-emerald); color: #065f46; background: #ecfdf5; }

.tab-panel { display: none; padding: 4px 2px; }
.tab-panel.is-active { display: block; animation: fadeIn 0.25s ease; }
.tab-panel > p { font-size: 15.5px; }
.panel-list { list-style: none; margin: 0; padding: 0; }
.panel-list li { position: relative; padding: 8px 0 8px 26px; font-size: 15px; }
.panel-list li::before { content: "✕"; position: absolute; left: 0; top: 8px; color: #dc2626; font-weight: 800; }

.deconstruct__steps { display: grid; gap: 12px; margin-top: 6px; }
.deconstruct-step {
  display: grid; grid-template-columns: 130px 1fr; gap: 16px; align-items: start;
  background: var(--bg-subtle); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 14px 16px;
}
.deconstruct-step__num {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--accent-primary); padding-top: 3px;
}
.deconstruct-step p { margin: 0; font-size: 15px; color: var(--text-primary); }
.hl { padding: 1px 5px; border-radius: 4px; }
.hl--blue { background: rgba(37, 99, 235, 0.16); color: #1e3a8a; }
.hl--emerald { background: rgba(5, 150, 105, 0.16); color: #065f46; }

/* ============================================================
   SECTION 6: MENTORS
============================================================ */
.mentors { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 40px; }
.mentor {
  display: flex; gap: 22px; align-items: flex-start;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 28px 26px; box-shadow: var(--shadow-sm);
}
.mentor__avatar {
  flex: none; width: 64px; height: 64px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 20px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-vibrant));
}
.mentor__role {
  display: inline-block; font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.03em; color: var(--accent-vibrant); margin-bottom: 8px;
}
.mentor__title { font-size: 20px; }
.mentor p { margin: 0; font-size: 15px; }

/* ============================================================
   SECTION 7: CONSULTATION BUILDER & FAQ
============================================================ */
.consult { padding-bottom: 72px; border-bottom: 1px solid var(--border-subtle); margin-bottom: 72px; }
.builder {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 30px 28px; margin-top: 36px; box-shadow: var(--shadow-sm);
}
.builder-step { padding: 22px 0; border-top: 1px solid var(--border-subtle); }
.builder-step:first-child { border-top: 0; padding-top: 0; }
.builder-step__head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.builder-step__head h3 { margin: 0; font-size: 18px; }
.builder-step__num {
  font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  color: var(--accent-vibrant); background: rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-sm); padding: 4px 9px;
}
.builder-options { display: flex; flex-wrap: wrap; gap: 10px; }
.builder-opt {
  font-family: var(--font-sans); font-size: 14.5px; font-weight: 600;
  color: var(--text-secondary); text-align: left;
  background: var(--bg-surface); border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-sm); padding: 12px 16px; cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.builder-opt:hover { border-color: var(--border-focus); }
.builder-opt.is-selected {
  border-color: var(--border-focus); background: rgba(37, 99, 235, 0.06);
  box-shadow: 0 0 0 1px var(--border-focus); color: var(--text-primary);
}
.builder-opt.is-recommended { box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.55); }
.builder-opt--program, .builder-opt--format {
  display: flex; flex-direction: column; gap: 4px; min-width: 200px; flex: 1;
}
.builder-opt--program strong, .builder-opt--format strong { color: var(--text-primary); }
.builder-opt--program span, .builder-opt--format span { font-size: 13px; font-weight: 400; color: var(--text-muted); }

.builder-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field__label { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.field input {
  font-family: var(--font-sans); font-size: 15px; color: var(--text-primary);
  padding: 12px 14px; border: 1.5px solid var(--border-subtle); border-radius: var(--radius-sm);
  background: var(--bg-surface);
}
.field input:focus { outline: none; border-color: var(--border-focus); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18); }

.builder-submit { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; padding-top: 22px; border-top: 1px solid var(--border-subtle); margin-top: 22px; }
.builder-submit__hint { font-size: 14px; color: var(--text-muted); margin: 0; }
.builder-submit__hint.is-ok { color: var(--accent-emerald); font-weight: 600; }

/* FAQ accordion */
.faq { padding-top: 0; }
.accordion { display: grid; gap: 12px; margin-top: 32px; }
.acc-item {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); overflow: hidden;
}
.acc-summary {
  list-style: none; cursor: pointer; font-size: 16.5px; font-weight: 700;
  color: var(--text-primary); padding: 18px 22px 18px 48px; position: relative;
}
.acc-summary::-webkit-details-marker { display: none; }
.acc-summary::before {
  content: "+"; position: absolute; left: 20px; top: 16px;
  font-family: var(--font-mono); font-size: 20px; font-weight: 600; color: var(--accent-vibrant);
  transition: transform 0.2s ease;
}
.acc-item[open] .acc-summary::before { transform: rotate(45deg); }
.acc-body { padding: 0 22px 22px 48px; }
.acc-body p { margin: 0; font-size: 15.5px; }

/* ============================================================
   SECTION 8: FOOTER
============================================================ */
.site-footer { background: var(--bg-dark); color: #A1A1AA; }
.footer-cta { padding: 88px 0; border-bottom: 1px solid #27272A; }
.footer-cta__inner { text-align: center; max-width: 780px; }
.footer-cta__title { color: #FAFAFA; font-size: clamp(28px, 4.6vw, 44px); }
.footer-cta__sub { color: #A1A1AA; font-size: 17px; }
.footer-cta__sub strong { color: #fff; }
.footer-meta { padding: 40px 0 48px; }
.footer-meta__inner { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; justify-content: space-between; }
.footer-brand { display: flex; flex-direction: column; gap: 4px; }
.footer-brand__name { color: #fff; font-size: 20px; letter-spacing: 0.02em; }
.footer-brand__tagline { font-size: 13.5px; color: #A1A1AA; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: #D4D4D8; font-size: 14.5px; font-weight: 600; }
.footer-links a:hover { color: #fff; }
.footer-copy { margin: 0; font-size: 13.5px; color: #71717A; width: 100%; }

/* ============================================================
   PARTNERSHIP PAGE COMPONENTS (kemitraan.html)
============================================================ */
.cards--4 { grid-template-columns: repeat(4, 1fr); }

.pillar {
  display: flex; flex-direction: column; gap: 14px;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 26px 22px; box-shadow: var(--shadow-sm);
}
.pillar__icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: rgba(37, 99, 235, 0.1); color: var(--accent-vibrant);
}
.pillar__icon svg { width: 22px; height: 22px; }
.pillar h3 { font-size: 18px; margin: 0; }
.pillar p { margin: 0; font-size: 14.5px; }

.card__num {
  font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  color: var(--accent-vibrant); background: rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-sm); padding: 4px 10px; align-self: flex-start;
}
.card__for {
  margin-top: auto; padding-top: 14px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--text-muted);
}

.scheme {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 26px 22px; box-shadow: var(--shadow-sm);
}
.scheme__badge {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 16px; color: #fff;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-vibrant));
}
.scheme h3 { font-size: 19px; margin: 0; }
.scheme p { margin: 0; font-size: 14.5px; }
.scheme__for { font-size: 13.5px; font-weight: 600; color: var(--accent-emerald); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.is-in { opacity: 1; transform: none; transition: opacity 0.55s ease, transform 0.55s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav {
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle);
    display: none; padding: 12px 24px 20px; box-shadow: var(--shadow-md);
  }
  .nav.is-open { display: block; }
  .nav__list { flex-direction: column; gap: 2px; }
  .nav__list a { padding: 13px 12px; font-size: 16px; }
  .burger { display: flex; }
  .header-tools { margin-left: auto; }
  .brand__pill { display: none; }

  .compare, .compare-strip, .mentors { grid-template-columns: 1fr; }
  .cards--4 { grid-template-columns: 1fr 1fr; }
  .hero__metrics { grid-template-columns: 1fr 1fr; }
  .timeline::before { left: 16px; }
  .timeline__item { grid-template-columns: 1fr; gap: 8px; }
  .timeline__time { text-align: left; }
}

@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .deconstruct-step { grid-template-columns: 1fr; gap: 6px; }
}

@media (max-width: 620px) {
  .section { padding: 64px 0; }
  .wrap { padding: 0 18px; }
  .hero { padding: 64px 0 56px; }
  .hero__metrics { grid-template-columns: 1fr; gap: 12px; }
  .cards--4 { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { width: 100%; }
  .builder-form { grid-template-columns: 1fr; }
  .tabs { flex-direction: column; }
  .tab { min-width: 0; }
  .card__cta { flex-direction: column; }
  .footer-meta__inner { flex-direction: column; align-items: flex-start; }
  .mentor { flex-direction: column; }
}

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