/* ============================================================
   ZEITGEBER — style.css
   Dark-only, mobile-first, no framework dependencies
   Single-page scrolling experience with AOS animations
   ============================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0F172A;
  color: #F8FAFC;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Design Tokens ────────────────────────────────────────── */
:root {
  --bg-base:       #0F172A;
  --bg-surface:    #1E293B;
  --bg-card:       rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border:        rgba(255, 255, 255, 0.08);
  --border-accent: rgba(124, 106, 239, 0.35);

  --text-primary:   #F8FAFC;
  --text-secondary: #A0AEC0;
  --text-tertiary:  #64748B;

  --accent-purple: #7C6AEF;
  --accent-purple-glow: rgba(124, 106, 239, 0.25);
  --accent-gold:   #FBBF24;
  --accent-gold-glow: rgba(251, 191, 36, 0.2);

  --radius-card:   16px;
  --radius-btn:    12px;
  --radius-sm:     8px;

  --max-w: 960px;

  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-6: 48px;
  --sp-8: 64px;
  --sp-12: 96px;
}

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 6vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 3vw, 1.375rem); }
h4 { font-size: 1rem; font-weight: 600; }

p { color: var(--text-secondary); }

a {
  color: var(--accent-purple);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: #9b8ef5; }

strong { color: var(--text-primary); font-weight: 600; }

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--sp-3);
}

.section {
  padding-block: var(--sp-12);
}

.section-sm {
  padding-block: var(--sp-6);
}

.section-alt {
  background: linear-gradient(180deg, rgba(124, 106, 239, 0.04) 0%, transparent 100%);
}

/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--sp-3);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.25s;
}

/* Mobile nav drawer */
.nav-mobile-menu {
  display: none;
  flex-direction: column;
  gap: var(--sp-2);
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: var(--sp-3);
}
.nav-mobile-menu a {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  padding: var(--sp-1) 0;
  border-bottom: 1px solid var(--border);
}
.nav-mobile-menu a:last-child { border-bottom: none; }
.nav-mobile-menu.open { display: flex; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-purple);
  color: white;
  box-shadow: 0 4px 20px var(--accent-purple-glow);
}
.btn-primary:hover {
  background: #6d5ce0;
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px var(--accent-purple-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--accent-purple);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
  border-radius: 14px;
}

.btn-gold {
  background: var(--accent-gold);
  color: #0F172A;
  box-shadow: 0 4px 20px var(--accent-gold-glow);
}
.btn-gold:hover {
  background: #f5b014;
  color: #0F172A;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px var(--accent-gold-glow);
}

/* App Store badge style */
.appstore-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--text-primary);
  color: var(--bg-base);
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 0.85rem;
  line-height: 1.2;
  transition: all 0.2s;
}
.appstore-badge:hover {
  background: #e2e8f0;
  color: var(--bg-base);
  transform: translateY(-1px);
}
.appstore-badge .badge-icon {
  font-size: 1.2rem;
}
.appstore-badge .badge-text {
  display: flex;
  flex-direction: column;
}
.appstore-badge .badge-sub {
  font-size: 0.65rem;
  font-weight: 400;
  opacity: 0.7;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.appstore-badge .badge-main {
  font-size: 0.9rem;
  font-weight: 700;
}

.appstore-badge-lg {
  padding: 14px 24px;
}
.appstore-badge-lg .badge-icon { font-size: 1.5rem; }
.appstore-badge-lg .badge-main { font-size: 1.05rem; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--sp-3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.card-accent {
  border-color: var(--border-accent);
  background: linear-gradient(135deg, rgba(124, 106, 239, 0.08), rgba(124, 106, 239, 0.02));
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  padding-top: var(--sp-12);
  padding-bottom: var(--sp-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 106, 239, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124, 106, 239, 0.12);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #9b8ef5;
  margin-bottom: var(--sp-3);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero h1 {
  margin-bottom: var(--sp-2);
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-purple), #9b8ef5 50%, var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin-inline: auto;
  margin-bottom: var(--sp-4);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  justify-content: center;
  margin-bottom: var(--sp-6);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  justify-content: center;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.hero-meta-item .dot {
  width: 6px;
  height: 6px;
  background: var(--accent-purple);
  border-radius: 50%;
}

/* ── Section Headers ──────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--sp-6);
}

.section-header h2 {
  margin-bottom: var(--sp-1);
}

.section-header p {
  font-size: 1.05rem;
  max-width: 540px;
  margin-inline: auto;
}

.section-label {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-purple);
  margin-bottom: var(--sp-1);
}

/* ── Problem Section ──────────────────────────────────────── */
.problem {
  background: linear-gradient(180deg, transparent, rgba(124, 106, 239, 0.04), transparent);
}

.problem-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

.stat-card {
  text-align: center;
  padding: var(--sp-3);
}

.stat-number {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-number.purple { color: var(--accent-purple); }
.stat-number.gold   { color: var(--accent-gold); }

.stat-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.problem-empathy {
  text-align: center;
  margin-top: var(--sp-4);
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}

/* ── How It Works ─────────────────────────────────────────── */
.steps {
  display: grid;
  gap: var(--sp-3);
}

.step {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
  padding: var(--sp-3);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: border-color 0.2s;
}
.step:hover { border-color: var(--border-accent); }

.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-purple), #9b8ef5);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  color: white;
}

.step-body h3 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: var(--text-primary);
}
.step-body p {
  font-size: 0.88rem;
  line-height: 1.5;
}

/* ── Features Timeline ────────────────────────────────────── */
.features-group-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-purple);
  margin-bottom: var(--sp-4);
}

.features-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.features-timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(124, 106, 239, 0.4) 8%,
    rgba(124, 106, 239, 0.4) 92%,
    transparent 100%
  );
  transform: translateX(-50%);
  pointer-events: none;
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  align-items: center;
  gap: 0;
  padding-block: var(--sp-4);
}

.timeline-item--left .timeline-content {
  grid-column: 1;
  grid-row: 1;
  text-align: right;
  padding-right: var(--sp-4);
}

.timeline-item--left .timeline-node {
  grid-column: 2;
  grid-row: 1;
}

.timeline-item--left::after {
  content: '';
  grid-column: 3;
  grid-row: 1;
}

.timeline-item--right .timeline-content {
  grid-column: 3;
  grid-row: 1;
  text-align: left;
  padding-left: var(--sp-4);
}

.timeline-item--right .timeline-node {
  grid-column: 2;
  grid-row: 1;
}

.timeline-item--right::before {
  content: '';
  grid-column: 1;
  grid-row: 1;
}

.timeline-node {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 0 4px var(--bg-base);
}

.timeline-content h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 340px;
}

.timeline-item--left .timeline-content p {
  margin-left: auto;
}

/* ── Features Pills ───────────────────────────────────────── */
.features-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-2);
}

.features-pill {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--sp-3);
  transition: border-color 0.2s, background 0.2s;
}

.features-pill:hover {
  background: rgba(124, 106, 239, 0.06);
  border-color: var(--border-accent);
}

.pill-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  line-height: 1.4;
}

.pill-text {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.pill-text strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 3px;
}

/* ── Evidence Callout ─────────────────────────────────────── */
.evidence-callout {
  background: linear-gradient(135deg,
    rgba(124, 106, 239, 0.12),
    rgba(124, 106, 239, 0.04));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-card);
  padding: var(--sp-6) var(--sp-4);
  text-align: center;
}

.evidence-number {
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 900;
  color: var(--accent-purple);
  letter-spacing: -0.04em;
  line-height: 1;
  display: block;
  margin-bottom: var(--sp-1);
}

.evidence-callout h2 {
  margin-bottom: var(--sp-2);
}

.evidence-callout p {
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: var(--sp-2);
  line-height: 1.7;
}

/* ── Education Programme ──────────────────────────────────── */
.education-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-2);
}

.education-card {
  padding: var(--sp-3);
}

.education-icon {
  font-size: 1.5rem;
  margin-bottom: var(--sp-1);
  display: block;
}

.education-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.education-card p {
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ── Founder Section ──────────────────────────────────────── */
.founder-content {
  display: grid;
  gap: var(--sp-4);
}

.founder-card {
  padding: var(--sp-4);
}

.founder-avatar {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--accent-purple), #9b8ef5);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--sp-2);
}

.founder-name {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.founder-credentials {
  font-size: 0.85rem;
  color: var(--accent-purple);
  font-weight: 500;
  margin-bottom: var(--sp-3);
}

.founder-quote {
  font-size: clamp(1rem, 2.5vw, 1.1rem);
  line-height: 1.7;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent-purple);
  padding-left: var(--sp-3);
  margin-block: var(--sp-3);
}

.founder-details {
  display: grid;
  gap: var(--sp-2);
}

.founder-detail-card {
  padding: var(--sp-3);
}

.founder-detail-card h4 {
  color: var(--text-primary);
  margin-bottom: var(--sp-1);
}

.founder-detail-card p {
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ── Privacy Callout ──────────────────────────────────────── */
.privacy-callout {
  background: linear-gradient(135deg,
    rgba(251, 191, 36, 0.06),
    rgba(251, 191, 36, 0.02));
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: var(--radius-card);
  padding: var(--sp-6) var(--sp-4);
  text-align: center;
}

.privacy-callout h2 {
  margin-bottom: var(--sp-2);
}

.privacy-callout p {
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: var(--sp-3);
  line-height: 1.7;
}

.privacy-links {
  display: flex;
  gap: var(--sp-2);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Pricing ──────────────────────────────────────────────── */
.pricing-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  max-width: 600px;
  margin-inline: auto;
}

.pricing-card {
  position: relative;
  padding: var(--sp-4);
  text-align: center;
}

.pricing-card.featured {
  border-color: var(--border-accent);
  background: linear-gradient(135deg,
    rgba(124, 106, 239, 0.1),
    rgba(124, 106, 239, 0.03));
}

.pricing-badge {
  display: inline-block;
  background: var(--accent-purple);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: var(--sp-2);
}

.pricing-badge.gold {
  background: var(--accent-gold);
  color: var(--bg-base);
}

.pricing-price {
  font-size: clamp(2rem, 6vw, 2.75rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.pricing-period {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-2);
}

.pricing-saving {
  display: inline-block;
  background: rgba(251, 191, 36, 0.12);
  color: var(--accent-gold);
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 12px;
  margin-bottom: var(--sp-3);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--sp-4);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.pricing-features li:last-child { border-bottom: none; }

.pricing-features li::before {
  content: '\2713';
  color: var(--accent-purple);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-trial-note {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: var(--sp-2);
}

/* ── Final CTA ────────────────────────────────────────────── */
.final-cta {
  text-align: center;
  padding-block: var(--sp-12);
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 106, 239, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta h2 {
  margin-bottom: var(--sp-2);
}

.final-cta h2 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-purple), #9b8ef5 50%, var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.final-cta p {
  margin-bottom: var(--sp-4);
  font-size: 1.05rem;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--sp-6);
}

.footer-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--sp-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  justify-content: space-between;
  align-items: flex-start;
}

.footer-brand .nav-logo {
  margin-bottom: var(--sp-1);
}

.footer-tagline {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  max-width: 280px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.footer-links a {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}
.footer-links a:hover { color: var(--text-secondary); }

.footer-copy {
  width: 100%;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-tertiary);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  justify-content: space-between;
}

/* ── Science Page ─────────────────────────────────────────── */
.prose {
  max-width: var(--max-w);
  margin-inline: auto;
}

.prose h2 {
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-2);
}

.prose h3 {
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-1);
  color: var(--text-primary);
}

.prose p {
  margin-bottom: var(--sp-3);
  font-size: 1rem;
  line-height: 1.75;
}

.prose p:last-child { margin-bottom: 0; }

.citation-grid {
  display: grid;
  gap: var(--sp-2);
}

.citation-card {
  padding: var(--sp-3);
  display: flex;
  gap: var(--sp-2);
  align-items: flex-start;
}

.citation-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: rgba(124, 106, 239, 0.15);
  border: 1px solid var(--border-accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-purple);
}

.citation-body {
  flex: 1;
}

.citation-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.citation-ref {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-style: italic;
}

.citation-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(124, 106, 239, 0.12);
  color: var(--accent-purple);
  border-radius: 100px;
  padding: 2px 8px;
  margin-top: 4px;
}

.citation-link {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent-purple);
  text-decoration: none;
  margin-top: 6px;
  opacity: 0.8;
  transition: opacity 0.15s;
}
.citation-link:hover {
  opacity: 1;
  text-decoration: underline;
}

.disclaimer-box {
  background: rgba(251, 191, 36, 0.06);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: var(--radius-card);
  padding: var(--sp-3);
}

.disclaimer-box h4 {
  color: var(--accent-gold);
  margin-bottom: var(--sp-1);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.disclaimer-box p {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-tertiary);
}

/* ── About Page (kept for backward compatibility) ─────────── */
.founder-section {
  display: grid;
  gap: var(--sp-4);
}

.values-grid {
  display: grid;
  gap: var(--sp-3);
}

.value-card {
  padding: var(--sp-3);
}

.value-icon {
  font-size: 1.5rem;
  margin-bottom: var(--sp-1);
  display: block;
}

.value-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.value-card p {
  font-size: 0.88rem;
  line-height: 1.55;
}

.contact-card {
  padding: var(--sp-4);
  text-align: center;
}

.contact-email {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-purple);
}

/* ── Divider ──────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: var(--sp-6);
}

/* ── Fade-in animations (legacy, kept for other pages) ────── */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .fade-in-delay-1 { transition-delay: 0.1s; }
  .fade-in-delay-2 { transition-delay: 0.2s; }
  .fade-in-delay-3 { transition-delay: 0.3s; }
  .fade-in-delay-4 { transition-delay: 0.4s; }
  .fade-in-delay-5 { transition-delay: 0.5s; }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links,
  .nav-cta .btn { display: none; }
  .nav-hamburger { display: flex; }

  .problem-stats {
    grid-template-columns: 1fr;
  }

  .features-timeline-line { display: none; }

  .timeline-item {
    grid-template-columns: 40px 1fr;
    grid-template-rows: auto;
    padding-block: var(--sp-3);
  }

  .timeline-item--left .timeline-node,
  .timeline-item--right .timeline-node {
    grid-column: 1;
    grid-row: 1;
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }

  .timeline-item--left .timeline-content,
  .timeline-item--right .timeline-content {
    grid-column: 2;
    grid-row: 1;
    text-align: left;
    padding-left: var(--sp-2);
    padding-right: 0;
  }

  .timeline-item--left .timeline-content p {
    margin-left: 0;
  }

  .timeline-item--left::after,
  .timeline-item--right::before {
    display: none;
  }

  .features-pills {
    grid-template-columns: 1fr;
  }

  .education-grid {
    grid-template-columns: 1fr;
  }

  .values-grid { grid-template-columns: 1fr; }

  .hero h1 {
    font-size: clamp(1.75rem, 7vw, 2.5rem);
  }

  .hero-meta {
    flex-direction: column;
    align-items: center;
    gap: var(--sp-1);
  }

  .final-cta h2 {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }
}

@media (min-width: 641px) {
  .steps { grid-template-columns: 1fr; }
  .pricing-cards { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 800px) {
  .education-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ── Blog / Article Pages ────────────────────────────────── */
.blog-header {
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-header::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 106, 239, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.blog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  justify-content: center;
  margin-bottom: var(--sp-2);
}

.blog-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(124, 106, 239, 0.12);
  color: var(--accent-purple);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  padding: 4px 12px;
}

.blog-date {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.blog-header h1 {
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--sp-2);
}

.blog-header .hero-subtitle {
  max-width: 600px;
}

.blog-body {
  padding-block: var(--sp-6);
}

.blog-body .prose h2 {
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-3);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--border);
}

.blog-body .prose h2:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: var(--sp-4);
}

.blog-body .prose h3 {
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-2);
}

.blog-body .prose ul,
.blog-body .prose ol {
  margin-bottom: var(--sp-3);
  padding-left: var(--sp-3);
  color: var(--text-secondary);
  line-height: 1.75;
}

.blog-body .prose li {
  margin-bottom: var(--sp-1);
  font-size: 1rem;
}

.blog-body .prose ul li::marker {
  color: var(--accent-purple);
}

.blog-body .prose ol li::marker {
  color: var(--accent-purple);
  font-weight: 700;
}

.blog-body .prose blockquote {
  border-left: 3px solid var(--accent-purple);
  padding-left: var(--sp-3);
  margin-block: var(--sp-3);
  font-style: italic;
}

.blog-body .prose blockquote p {
  color: var(--text-secondary);
}

.blog-cta-box {
  background: linear-gradient(135deg,
    rgba(124, 106, 239, 0.1),
    rgba(124, 106, 239, 0.03));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-card);
  padding: var(--sp-4);
  text-align: center;
  margin-block: var(--sp-6);
}

.blog-cta-box h3 {
  margin-bottom: var(--sp-1);
  color: var(--text-primary);
}

.blog-cta-box p {
  margin-bottom: var(--sp-3);
  max-width: 500px;
  margin-inline: auto;
}

.blog-related {
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
}

.blog-related h3 {
  margin-bottom: var(--sp-3);
  color: var(--text-primary);
}

.blog-related-grid {
  display: grid;
  gap: var(--sp-2);
}

@media (min-width: 641px) {
  .blog-related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.blog-related-card {
  padding: var(--sp-3);
}

.blog-related-card h4 {
  color: var(--text-primary);
  margin-bottom: var(--sp-1);
  font-size: 0.95rem;
}

.blog-related-card p {
  font-size: 0.82rem;
  line-height: 1.5;
}

.blog-related-card a {
  display: inline-block;
  margin-top: var(--sp-1);
  font-size: 0.82rem;
  font-weight: 600;
}