/* Base */
:root {
  --bg: #F7F4EF;
  --fg: #1C2B1F;
  --accent: #C47D1A;
  --muted: #7A8F79;
  --surface: #FFFFFF;
  --border: #E2DDD4;
  --sage: #A8B5A0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Instrument Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 60px;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.nav-tagline {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 500;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 60px 100px;
  min-height: 90vh;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 500;
}

.hero-headline {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.hero-body {
  font-size: 1.1rem;
  color: #4A5447;
  max-width: 440px;
  line-height: 1.7;
}

.hero-proof {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 8px;
}

.proof-stat {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--accent);
}

.proof-text {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 200px;
  line-height: 1.4;
}

/* Phrase card */
.phrase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 36px;
  box-shadow: 0 2px 20px rgba(28, 43, 31, 0.06);
}

.phrase-card-date {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 20px;
}

.phrase-card-text {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.8rem;
  font-weight: 400;
  font-style: italic;
  color: var(--fg);
  margin-bottom: 20px;
  line-height: 1.3;
  border-left: 3px solid var(--accent);
  padding-left: 16px;
}

.phrase-card-usage {
  font-size: 0.875rem;
  color: #4A5447;
  line-height: 1.6;
  margin-bottom: 24px;
}

.phrase-card-practice {
  background: var(--bg);
  border-radius: 2px;
  padding: 16px 20px;
}

.practice-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
  font-weight: 600;
}

.practice-script {
  font-size: 0.875rem;
  color: var(--fg);
  line-height: 1.5;
  font-style: italic;
}

/* Section eyebrow */
.section-eyebrow {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
}

/* How it works */
.how-it-works {
  background: var(--fg);
  color: var(--bg);
  padding: 100px 60px;
}

.section-header {
  margin-bottom: 64px;
}

.section-title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 64px;
}

.step-number {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 3rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 20px;
  line-height: 1;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--bg);
}

.step-body {
  font-size: 0.9rem;
  color: #9AACA0;
  line-height: 1.6;
}

.divider-line {
  height: 1px;
  background: #2D3F30;
  margin: 48px 0;
}

.autonomous-note {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.autonomous-badge {
  background: var(--accent);
  color: var(--fg);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
}

.autonomous-note p {
  font-size: 0.9rem;
  color: #9AACA0;
  line-height: 1.6;
}

/* Sample lesson */
.sample-lesson {
  padding: 100px 60px;
  background: var(--surface);
}

.sample-lesson-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.sample-title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 24px;
}

.sample-body {
  font-size: 1rem;
  color: #4A5447;
  line-height: 1.7;
  margin-bottom: 28px;
}

.sample-vocab {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.vocab-term {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.3rem;
  font-style: italic;
  color: var(--fg);
}

.vocab-def {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Lesson card */
.lesson-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 32px;
}

.lesson-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.lesson-day {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.lesson-status {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #4A8B5A;
  font-weight: 600;
}

.lesson-phrase {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.4rem;
  font-style: italic;
  color: var(--fg);
  margin-bottom: 24px;
  border-left: 3px solid var(--accent);
  padding-left: 14px;
}

.lesson-context {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.lesson-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
  font-size: 0.85rem;
}

.lesson-key {
  color: var(--muted);
  font-weight: 500;
}

.lesson-val {
  color: var(--fg);
}

.lesson-progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}

.progress-label {
  font-size: 0.75rem;
  color: var(--muted);
}

/* Philosophy */
.philosophy {
  padding: 100px 60px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.philosophy-inner {
  max-width: 900px;
}

.philosophy-statement {
  margin-bottom: 64px;
}

.philosophy-statement p {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2rem;
  font-style: italic;
  color: var(--fg);
  line-height: 1.4;
  border-left: 4px solid var(--accent);
  padding-left: 28px;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.philosophy-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.philosophy-icon {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2.5rem;
  color: var(--accent);
  line-height: 1;
}

.philosophy-item p {
  font-size: 0.9rem;
  color: #4A5447;
  line-height: 1.6;
}

/* Closing */
.closing {
  padding: 120px 60px;
  background: var(--fg);
  color: var(--bg);
  text-align: center;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing-headline {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.closing-body {
  font-size: 1rem;
  color: #9AACA0;
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 48px 60px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-meta p {
  font-size: 0.85rem;
  color: #4A5447;
  margin-bottom: 4px;
}

.footer-build {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 16px;
}

/* Responsive */
@media (max-width: 900px) {
  .nav { padding: 20px 28px; }
  .hero { grid-template-columns: 1fr; gap: 48px; padding: 60px 28px 80px; min-height: auto; }
  .hero-visual { order: -1; }
  .steps-grid { grid-template-columns: 1fr; gap: 32px; }
  .how-it-works { padding: 72px 28px; }
  .sample-lesson-inner { grid-template-columns: 1fr; gap: 48px; }
  .sample-lesson { padding: 72px 28px; }
  .philosophy { padding: 72px 28px; }
  .philosophy-grid { grid-template-columns: 1fr; gap: 32px; }
  .closing { padding: 80px 28px; }
  .footer { padding: 36px 28px; }
  .footer-inner { flex-direction: column; gap: 20px; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 2.8rem; }
  .section-title { font-size: 2rem; }
}