:root {
  --bg: #FAF6F1;
  --bg-alt: #F2EDE6;
  --fg: #1C1917;
  --fg-muted: #78716C;
  --accent: #E8720C;
  --accent-light: #FEF3E8;
  --surface: #FFFFFF;
  --border: #E5DDD4;
  --mockup-bg: #1C1917;
  --mockup-surface: #2A2520;
  --mockup-text: #F5EFE8;
  --mockup-muted: #A0968E;
  --mockup-accent: #E8720C;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Instrument Sans', system-ui, sans-serif;
}

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

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Navigation ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.nav-tagline {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ── Hero ── */
.hero {
  padding: 5rem 3rem 4rem;
  overflow: hidden;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 1.5rem;
}

.hero-lede {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 42ch;
  margin-bottom: 2.5rem;
}

.hero-example {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  max-width: 480px;
}

.example-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.example-row:last-child { margin-bottom: 0; }

.example-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  min-width: 2.5rem;
  padding-top: 0.2rem;
}

.user-msg .example-label { color: var(--accent); }

.example-bubble {
  font-size: 0.85rem;
  color: var(--fg);
  line-height: 1.5;
  background: var(--bg-alt);
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
}

/* ── Mockup ── */
.hero-mockup {
  display: flex;
  justify-content: center;
}

.mockup-window {
  width: 100%;
  max-width: 380px;
  background: var(--mockup-bg);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(28,25,23,0.18), 0 4px 16px rgba(28,25,23,0.08);
  font-family: var(--font-sans);
}

.mockup-header {
  background: var(--mockup-surface);
  padding: 0.9rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mockup-dots {
  display: flex;
  gap: 0.4rem;
}

.mockup-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #4A4340;
}

.mockup-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--mockup-text);
  letter-spacing: 0.01em;
}

.mockup-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mock-msg {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.mock-name {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--mockup-muted);
}

.mock-self .mock-name { color: var(--mockup-accent); }

.mock-msg p {
  font-size: 0.82rem;
  color: var(--mockup-text);
  line-height: 1.5;
  background: var(--mockup-surface);
  padding: 0.7rem 1rem;
  border-radius: 12px;
}

.mock-self p {
  background: rgba(232, 114, 12, 0.15);
  border: 1px solid rgba(232, 114, 12, 0.25);
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--mockup-surface);
  border-radius: 10px;
  padding: 0.75rem 1rem;
}

.contact-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--mockup-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info { flex: 1; }

.contact-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--mockup-text);
}

.contact-meta {
  font-size: 0.7rem;
  color: var(--mockup-muted);
  margin-top: 0.15rem;
}

.draft-area {
  background: var(--mockup-surface);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(232, 114, 12, 0.2);
}

.draft-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--mockup-accent);
  margin-bottom: 0.5rem;
}

.draft-text {
  font-size: 0.78rem;
  color: var(--mockup-muted);
  line-height: 1.5;
  font-style: italic;
  margin-bottom: 0.85rem;
}

.draft-actions {
  display: flex;
  gap: 0.6rem;
}

.action-btn {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border-radius: 6px;
  cursor: default;
}

.action-btn.edit {
  background: rgba(255,255,255,0.06);
  color: var(--mockup-muted);
}

.action-btn.send {
  background: var(--mockup-accent);
  color: #fff;
}

/* ── Workflow ── */
.workflow {
  background: var(--fg);
  padding: 5rem 3rem;
}

.workflow-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: 1.5rem;
}

.workflow-step {}

.step-num {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: rgba(255,255,255,0.08);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.workflow-step h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: #fff;
  font-weight: 400;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.workflow-step p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.65;
}

.workflow-arrow {
  color: var(--accent);
  padding-top: 2.5rem;
  opacity: 0.6;
}

/* ── Features ── */
.features {
  padding: 5rem 3rem;
}

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

.features-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 400;
  color: var(--fg);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  max-width: 52ch;
  margin: 0 auto;
  line-height: 1.65;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.feature-card {
  background: var(--bg);
  padding: 2.5rem;
  transition: background 0.2s;
}

.feature-card:hover { background: var(--bg-alt); }

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
}

.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--fg);
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ── Closing ── */
.closing {
  background: var(--bg-alt);
  padding: 6rem 3rem;
  text-align: center;
}

.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing-statement {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 400;
  color: var(--fg);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

.closing-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  max-width: 48ch;
  margin: 0 auto;
  line-height: 1.65;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 3rem;
}

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

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--fg);
}

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

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-mockup {
    order: -1;
  }

  .mockup-window {
    max-width: 340px;
  }

  .workflow-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .workflow-arrow {
    display: none;
  }

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

@media (max-width: 600px) {
  nav, .hero, .workflow, .features, .closing, footer {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .hero {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  .hero-headline {
    font-size: 2.2rem;
  }

  .feature-card {
    padding: 1.75rem;
  }
}