/* ==========================================
   SIEVE — Landing Page Stylesheet
   ========================================== */

:root {
  --bg: #0F0F12;
  --surface: #1A1A22;
  --surface-alt: #22222D;
  --text: #F5F0E6;
  --text-muted: #8A8A9A;
  --accent: #F5A623;
  --accent-dim: #C47D0A;
  --border: #2A2A38;
}

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

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

/* NAV */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
}

.nav-wordmark {
  font-family: 'Instrument Serif', serif;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav-tagline {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* HERO */
.hero {
  padding: 80px 48px 64px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.hero-headline {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(42px, 5vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 28px;
}

.hero-headline em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 440px;
  margin-bottom: 36px;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-muted);
}

/* HERO RIGHT — Wave + Transcript */
.hero-right {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.wave-viz {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 64px;
  padding: 0 4px;
}

.wave-bar {
  flex: 1;
  background: var(--accent);
  border-radius: 2px;
  height: 100%;
  animation: wave 1.8s ease-in-out infinite;
}

.w1  { animation-delay: 0.0s; }
.w2  { animation-delay: 0.1s; }
.w3  { animation-delay: 0.2s; }
.w4  { animation-delay: 0.3s; }
.w5  { animation-delay: 0.4s; }
.w6  { animation-delay: 0.5s; }
.w7  { animation-delay: 0.6s; }
.w8  { animation-delay: 0.7s; }
.w9  { animation-delay: 0.8s; }
.w10 { animation-delay: 0.9s; }
.w11 { animation-delay: 1.0s; }
.w12 { animation-delay: 1.1s; }

@keyframes wave {
  0%, 100% { height: 30%; opacity: 0.5; }
  50% { height: 100%; opacity: 1; }
}

.transcript-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.transcript-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.transcript-label.alt {
  color: #7EC8A4;
}

.transcript-line {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  font-style: italic;
}

.transcript-line.highlight {
  color: var(--accent);
  font-style: normal;
  font-size: 12px;
  border-left: 2px solid var(--accent-dim);
  padding-left: 10px;
  margin-top: 4px;
}

/* STATS */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px;
}

.stats-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 1100px;
  margin: 0 auto;
  gap: 64px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-family: 'Instrument Serif', serif;
  font-size: 52px;
  letter-spacing: -0.03em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 160px;
}

.stat-divider {
  width: 1px;
  height: 60px;
  background: var(--border);
}

/* HOW */
.how {
  padding: 96px 48px;
}

.how-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-eyebrow {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-headline {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(28px, 3.5vw, 44px);
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 64px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.step-num {
  font-family: 'Instrument Serif', serif;
  font-size: 48px;
  color: var(--border);
  line-height: 1;
  margin-bottom: 20px;
}

.step h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.step p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* DIFFERENTIATOR */
.diff {
  background: var(--surface);
  padding: 96px 48px;
}

.diff-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--border);
  margin: 40px 0 48px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.diff-col {
  background: var(--surface);
  padding: 32px;
}

.diff-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 600;
}

.diff-mid {
  color: var(--text-muted);
}

.diff-accent {
  color: var(--accent);
}

.diff-col p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.diff-highlight {
  background: var(--surface-alt);
}

.diff-quote {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 20px;
  color: var(--text-muted);
  line-height: 1.5;
  border-left: 3px solid var(--accent);
  padding-left: 24px;
  max-width: 680px;
}

/* CLOSING */
.closing {
  padding: 96px 48px 80px;
}

.closing-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.closing-headline {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(28px, 3.5vw, 44px);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 28px;
}

.closing-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.65;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-wordmark {
  font-family: 'Instrument Serif', serif;
  font-size: 18px;
  color: var(--text);
}

.footer-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-note {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav { padding: 20px 24px; }
  .hero { padding: 48px 24px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-right { order: -1; }
  .stats { padding: 32px 24px; }
  .stats-inner { flex-direction: column; gap: 32px; }
  .stat-divider { display: none; }
  .how { padding: 64px 24px; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .diff { padding: 64px 24px; }
  .diff-grid { grid-template-columns: 1fr; }
  .closing { padding: 64px 24px 48px; }
  .footer { padding: 32px 24px; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .section-headline { margin-bottom: 40px; }
}