:root {
  --color-ground: #1A2333;
  --color-surface: #243044;
  --color-surface-hover: #2D3C56;
  --color-border: #2F3F58;
  --color-text-primary: #E6EBF4;
  --color-text-secondary: #7B8BA0;
  --color-text-muted: #4A5A72;
  --color-accent: #C9A84C;
  --color-accent-dim: #9A7C32;
  --color-score-high: #3DBA73;
  --color-score-mid: #C9A84C;
  --color-score-low: #E05151;
  --color-coach-bg: #1E2A3E;
  --color-coach-border: #38506E;

  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px; --radius-xl: 16px;

  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);

  --text-xs: 11px; --text-sm: 12px; --text-base: 14px; --text-md: 15px;
  --text-lg: 16px; --text-xl: 17px; --text-2xl: 20px; --text-3xl: 24px;
  --text-4xl: 32px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--color-ground);
  color: var(--color-text-primary);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: var(--text-base);
  line-height: 1.5;
}

a { color: inherit; }

.serif { font-family: 'DM Serif Display', serif; }
.mono { font-family: 'JetBrains Mono', monospace; }

.section { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 40;
  background: rgba(26,35,51,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  color: var(--color-text-primary);
  text-decoration: none;
}
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-md);
}
.nav-actions { display: flex; gap: 12px; align-items: center; }
.nav-signin { color: var(--color-text-secondary); text-decoration: none; font-size: var(--text-md); }

.btn-cta {
  background: var(--color-accent);
  color: var(--color-ground);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  display: inline-block;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
  font-size: 22px;
  padding: 4px;
  line-height: 1;
}

.nav-mobile-menu {
  display: none;
  background: rgba(26,35,51,0.98);
  border-top: 1px solid var(--color-border);
  padding: 12px 20px 20px;
}
.nav-mobile-menu a {
  display: block;
  padding: 12px 0;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-md);
  border-bottom: 1px solid var(--color-border);
}
.nav-mobile-menu a:last-child { border-bottom: none; }

@media (max-width: 767px) {
  .nav-links, .nav-actions .nav-signin, .nav-actions .btn-cta.desktop-only { display: none; }
  .nav-toggle { display: block; }
  #nav-check:checked ~ .nav-mobile-menu { display: block; }
}
@media (min-width: 768px) {
  .nav-toggle, .nav-mobile-menu, .mobile-only { display: none; }
}

#nav-check { display: none; }

/* Hero */
.hero { padding-top: 140px; padding-bottom: 80px; text-align: center; }
@media (max-width: 767px) { .hero { padding-top: 100px; padding-bottom: 48px; } }

.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(32px, 6vw, 64px);
  line-height: 1.1;
  margin: 0 0 20px;
  color: var(--color-text-primary);
}
.hero h1 .accent { color: var(--color-accent); }

.hero p {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.6;
  padding: 0 8px;
}
@media (max-width: 767px) { .hero p { font-size: var(--text-base); } }

.hero .btn-cta { padding: 16px 40px; min-width: 220px; }
@media (max-width: 767px) { .hero .btn-cta { padding: 14px 28px; min-width: 180px; } }

/* Mock session UI */
.mock-session {
  max-width: 840px;
  margin: 64px auto 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  text-align: left;
}
@media (max-width: 767px) { .mock-session { margin: 40px auto 0; } }

.mock-titlebar {
  background: var(--color-surface-hover);
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: 8px;
  align-items: center;
}
.mock-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.mock-dot.red { background: #E05151; }
.mock-dot.yellow { background: #C9A84C; }
.mock-dot.green { background: #3DBA73; }
.mock-titlebar span.label {
  margin-left: 8px;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-body {
  display: grid;
  grid-template-columns: 60% 40%;
  min-height: 300px;
}
@media (max-width: 767px) { .mock-body { grid-template-columns: 1fr; min-height: auto; } }

.mock-chat { padding: 24px; display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 767px) { .mock-chat { padding: 16px; } }

.bubble {
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  max-width: 88%;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  line-height: 1.5;
}
.bubble.them { background: var(--color-surface-hover); border: 1px solid var(--color-border); }
.bubble.me { background: rgba(201,168,76,0.08); border: 1px solid rgba(201,168,76,0.2); margin-left: auto; }

.mock-coach {
  background: var(--color-coach-bg);
  border-left: 1px solid var(--color-coach-border);
  padding: 20px;
}
@media (max-width: 767px) {
  .mock-coach { border-left: none; border-top: 1px solid var(--color-coach-border); padding: 14px 16px; }
}
.mock-coach-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
@media (max-width: 767px) { .mock-coach-label { margin-bottom: 10px; } }

.mock-coach-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
@media (max-width: 767px) { .mock-coach-body { flex-direction: row; align-items: center; gap: 14px; } }

.score-circle {
  width: 56px; height: 56px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-score-high);
  display: flex; align-items: center; justify-content: center;
  font-family: 'DM Serif Display', serif;
  font-size: 24px;
  color: white;
  margin: 0 auto 16px;
}
@media (max-width: 767px) { .score-circle { width: 40px; height: 40px; font-size: 18px; margin: 0; } }

.coach-note {
  background: var(--color-surface);
  border-left: 4px solid var(--color-score-high);
  border-radius: 0 4px 4px 0;
  padding: 10px 14px;
}
.coach-note .k { font-size: var(--text-xs); color: var(--color-text-muted); font-family: 'JetBrains Mono', monospace; margin-bottom: 4px; }
.coach-note .v { font-size: var(--text-xs); color: var(--color-text-primary); font-family: 'JetBrains Mono', monospace; }

/* Generic sections */
section.panel { padding: 80px 0; }
@media (max-width: 767px) { section.panel { padding: 60px 0; } }
.bg-surface { background: var(--color-surface); }
.bg-ground { background: var(--color-ground); }

h2.section-title {
  text-align: center;
  font-size: var(--text-4xl);
  margin: 0 0 64px;
}
@media (max-width: 767px) { h2.section-title { font-size: var(--text-3xl); margin-bottom: 40px; } }

/* How it works */
.steps {
  display: flex;
  gap: 0;
  position: relative;
}
@media (max-width: 767px) { .steps { flex-direction: column; gap: 32px; } }

.steps::before {
  content: '';
  position: absolute;
  top: 14px; left: 16.5%; right: 16.5%;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.6;
}
@media (max-width: 767px) {
  .steps::before { top: 28px; bottom: 28px; left: 20px; right: auto; width: 1px; height: auto; }
}

.step { flex: 1; text-align: center; padding: 0 24px; position: relative; }
@media (max-width: 767px) { .step { text-align: left; padding: 0 0 0 48px; } }

.step-badge {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--color-ground);
  border: 2px solid var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
  position: relative;
  z-index: 1;
}
@media (max-width: 767px) {
  .step-badge { position: absolute; left: 8px; top: 2px; width: 24px; height: 24px; margin: 0; }
}
.step-badge span { font-size: 9px; font-weight: 700; color: var(--color-accent); letter-spacing: 0.05em; }

.step-title { font-size: var(--text-xl); font-weight: 600; color: var(--color-text-primary); margin-bottom: 8px; }
.step-desc { font-size: var(--text-base); color: var(--color-text-secondary); line-height: 1.6; }

/* Pricing */
.price-card {
  max-width: 420px;
  margin: 0 auto;
  background: var(--color-ground);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
}
@media (max-width: 767px) { .price-card { padding: 24px; } }

.price-badge {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-ground);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  white-space: nowrap;
}

.price-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}
.price-plan { font-size: var(--text-xl); font-weight: 700; color: var(--color-text-primary); margin-bottom: 4px; }
.price-sub { font-size: var(--text-sm); color: var(--color-text-muted); }
.price-amount {
  font-family: 'DM Serif Display', serif;
  font-size: 44px;
  color: var(--color-accent);
  line-height: 1;
  text-align: right;
}
@media (max-width: 767px) { .price-amount { font-size: 36px; } }
.price-amount .unit { font-size: var(--text-base); font-family: 'Inter', sans-serif; }
.price-billed { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: 4px; text-align: right; }

.price-features { list-style: none; margin: 0 0 24px; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.price-features li { font-size: var(--text-base); color: var(--color-text-secondary); display: flex; gap: 10px; align-items: flex-start; }
.price-features li::before { content: '✓'; color: var(--color-score-high); flex-shrink: 0; margin-top: 1px; }

.price-note { margin-top: 12px; font-size: var(--text-sm); color: var(--color-text-muted); text-align: center; }

.price-cta { width: 100%; padding: 14px; text-align: center; }

.price-tagline { text-align: center; color: var(--color-text-secondary); font-size: var(--text-base); margin: -52px 0 48px; }
@media (max-width: 767px) { .price-tagline { margin-bottom: 32px; } }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 680px; margin: 0 auto; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.faq-item > summary {
  list-style: none;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: var(--color-surface);
  color: var(--color-text-primary);
  cursor: pointer;
  font-size: var(--text-md);
  font-weight: 500;
  gap: 12px;
}
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary::after {
  content: '+';
  color: var(--color-accent);
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
.faq-item[open] > summary::after { transform: rotate(45deg); }
.faq-item .faq-answer {
  padding: 16px 20px 20px;
  background: var(--color-ground);
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.6;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 20px;
  text-align: center;
}
footer .footer-inner { font-size: var(--text-sm); color: var(--color-text-muted); }
footer a { color: var(--color-text-muted); text-decoration: none; margin-right: 16px; }

/* Legal pages */
.legal-page { min-height: 100vh; padding: clamp(48px,8vw,80px) clamp(16px,4vw,24px); }
.legal-page .wrap { max-width: 720px; margin: 0 auto; }
.legal-back { color: var(--color-accent); text-decoration: none; font-size: var(--text-base); display: block; margin-bottom: 28px; }
.legal-page h1 { font-family: 'DM Serif Display', serif; font-size: clamp(28px,5vw,40px); margin-bottom: 36px; color: var(--color-text-primary); }
.legal-body { color: var(--color-text-secondary); font-size: var(--text-md); line-height: 1.8; }
.legal-body h3 { color: var(--color-text-primary); margin-top: 32px; }
.legal-body strong { color: var(--color-text-primary); }
.legal-body a { color: var(--color-accent); }