/* ============================================================
   Plume — Site marketing
   Foundation tokens + page styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Geist:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Brand palette */
  --plume-blue-50:  #EEF4FC;
  --plume-blue-100: #D6E6F8;
  --plume-blue-200: #AECDF0;
  --plume-blue-300: #7AAEE5;
  --plume-blue-400: #3F87D4;
  --plume-blue-500: #0B5FC1;
  --plume-blue-600: #094FA3;
  --plume-blue-700: #073D80;
  --plume-blue-800: #062E60;
  --plume-blue-900: #041F42;

  --plume-ink-50:   #F4F6F9;
  --plume-ink-100:  #E6EAF1;
  --plume-ink-200:  #C9D1DE;
  --plume-ink-300:  #9AA6B8;
  --plume-ink-400:  #66738A;
  --plume-ink-500:  #3F4B61;
  --plume-ink-600:  #283448;
  --plume-ink-700:  #1A2538;
  --plume-ink-800:  #0F1A2C;
  --plume-ink-900:  #08111F;

  --plume-gold-50:  #FBF6EC;
  --plume-gold-100: #F5E8C9;
  --plume-gold-300: #E0C381;
  --plume-gold-500: #BC8F3A;
  --plume-gold-700: #8A661F;

  --plume-paper:    #FAFAF6;
  --plume-paper-2:  #F3F2EC;
  --plume-white:    #FFFFFF;

  --success-500: #1F8A4E;
  --danger-500:  #C73B30;

  --bg:           var(--plume-paper);
  --bg-elevated:  var(--plume-white);
  --bg-inverse:   var(--plume-ink-900);

  --fg1: var(--plume-ink-900);
  --fg2: var(--plume-ink-500);
  --fg3: var(--plume-ink-400);

  --border:        var(--plume-ink-100);
  --border-strong: var(--plume-ink-200);

  --link:       var(--plume-blue-600);
  --link-hover: var(--plume-blue-700);

  --font-serif: 'Instrument Serif', 'Source Serif Pro', Georgia, serif;
  --font-sans:  'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  --shadow-sm: 0 1px 2px rgba(8,17,31,0.06), 0 1px 1px rgba(8,17,31,0.04);
  --shadow-md: 0 4px 12px -2px rgba(8,17,31,0.08), 0 2px 4px -1px rgba(8,17,31,0.05);
  --shadow-lg: 0 12px 28px -6px rgba(8,17,31,0.12), 0 4px 10px -3px rgba(8,17,31,0.06);
  --shadow-xl: 0 24px 50px -12px rgba(8,17,31,0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg1);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--link); text-decoration: none; transition: color 140ms var(--ease-out); }
a:hover { color: var(--link-hover); }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(250,250,246,0.78);
  border-bottom: 1px solid var(--border);
}
.nav-in {
  max-width: 1200px; margin: 0 auto;
  height: 72px; padding: 0 32px;
  display: flex; align-items: center; gap: 32px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-serif); font-size: 24px; color: var(--fg1);
}
.nav-logo img { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 24px; flex: 1; }
.nav-links a { font-size: 14px; color: var(--fg2); font-weight: 500; }
.nav-cta { display: flex; gap: 10px; align-items: center; }

/* ---------- Buttons ---------- */
.btn {
  font-family: inherit; font-weight: 500;
  padding: 10px 16px; border-radius: 10px;
  border: 1px solid transparent; cursor: pointer;
  font-size: 14px; line-height: 1;
  transition: all 140ms var(--ease-out);
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
}
.btn-primary { background: var(--plume-blue-500); color: #fff; }
.btn-primary:hover { background: var(--plume-blue-600); color: #fff; }
.btn-ghost { background: transparent; color: var(--fg1); }
.btn-ghost:hover { background: var(--plume-ink-50); color: var(--fg1); }
.btn-outline { background: transparent; color: var(--fg1); border-color: var(--border-strong); }
.btn-outline:hover { background: var(--plume-ink-50); color: var(--fg1); }
.btn-lg { padding: 14px 22px; font-size: 16px; border-radius: 12px; }

/* ---------- Hero ---------- */
.hero { padding: 96px 32px 64px; max-width: 1200px; margin: 0 auto; position: relative; }
.eyebrow {
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--plume-blue-600); font-weight: 500;
  margin-bottom: 18px; display: flex; align-items: center; gap: 8px;
}
.eyebrow::before {
  content: ''; width: 24px; height: 1px;
  background: var(--plume-blue-500); display: inline-block;
}
h1.display {
  font-family: var(--font-serif);
  font-size: clamp(48px, 6vw, 84px);
  line-height: 1.08; letter-spacing: -0.02em;
  margin: 0; color: var(--fg1); font-weight: 400;
  max-width: 14ch; position: relative; z-index: 1;
}
h1.display em { font-style: italic; color: var(--plume-blue-600); }
.hero-sub {
  font-size: 19px; line-height: 1.55; color: var(--fg2);
  max-width: 56ch; margin-top: 28px; position: relative; z-index: 1;
}
.hero-cta {
  display: flex; gap: 12px; margin-top: 32px;
  align-items: center; flex-wrap: wrap;
}
.hero-cta .note { font-size: 13px; color: var(--fg3); }
.watermark { position: absolute; right: -120px; top: 40px; pointer-events: none; opacity: 0.04; }

/* ---------- Preview frame ---------- */
.preview { max-width: 1100px; margin: 64px auto 0; padding: 0 32px; }
.preview-frame {
  background: #fff; border: 1px solid var(--border);
  border-radius: 20px; box-shadow: var(--shadow-xl); overflow: hidden;
}
.preview-bar {
  height: 40px; background: var(--plume-paper);
  display: flex; align-items: center; gap: 6px;
  padding: 0 14px; border-bottom: 1px solid var(--border);
}
.preview-bar span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--plume-ink-100);
}
.preview-body {
  padding: 32px 40px; min-height: 360px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px;
}
.prev-card {
  background: var(--plume-paper); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px;
}
.prev-h {
  font-size: 13px; font-weight: 500; color: var(--fg3);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.prev-q {
  font-family: var(--font-serif); font-style: italic;
  font-size: 22px; line-height: 1.36; color: var(--fg1); margin-top: 12px;
}
.prev-meta {
  font-size: 12px; color: var(--fg3);
  margin-top: 14px; display: flex; gap: 14px; flex-wrap: wrap;
}
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 8px; border-radius: 999px;
  background: var(--plume-gold-50); color: var(--plume-gold-700);
  font-size: 11px; font-weight: 500;
}

/* ---------- Sections ---------- */
.section { padding: 96px 32px; max-width: 1200px; margin: 0 auto; }
.section-head { max-width: 720px; margin: 0 auto 64px; text-align: center; }
.section-head .eyebrow { justify-content: center; }
.section-head .eyebrow::before { display: none; }
.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.08; letter-spacing: -0.015em;
  margin: 0; font-weight: 400;
}
.section-head p {
  font-size: 18px; color: var(--fg2);
  line-height: 1.55; margin-top: 16px;
}

/* ---------- Features ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature {
  background: #fff; border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; box-shadow: var(--shadow-sm);
}
.feature .ico {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--plume-blue-50); color: var(--plume-blue-600);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature h3 { font-size: 18px; font-weight: 600; margin: 0 0 8px; color: var(--fg1); }
.feature p { font-size: 14px; line-height: 1.6; color: var(--fg2); margin: 0; }
.feature .mode-num {
  display: inline-block; font-size: 11px; font-weight: 600;
  color: var(--plume-blue-600); letter-spacing: 0.08em;
  margin-bottom: 12px;
}

/* ---------- Voice (dark section) ---------- */
.voice { background: var(--plume-ink-900); color: #fff; padding: 96px 32px; }
.voice-in { max-width: 1100px; margin: 0 auto; }
.voice .eyebrow { color: var(--plume-gold-300); }
.voice .eyebrow::before { background: var(--plume-gold-500); }
.voice h2 {
  font-family: var(--font-serif);
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.08; font-weight: 400;
  color: #fff; margin: 0 0 48px; max-width: 18ch;
}
.voice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.voice-col {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px; padding: 28px;
}
.voice-col h3 {
  font-size: 14px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  margin: 0 0 18px; color: rgba(255,255,255,0.6);
}
.voice-col.do h3 { color: var(--plume-gold-300); }
.voice-col.dont h3 { color: rgba(255,255,255,0.5); }
.voice-line {
  font-family: var(--font-serif); font-style: italic;
  font-size: 19px; line-height: 1.4;
  padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.voice-line:last-child { border-bottom: none; }
.voice-col.dont .voice-line {
  text-decoration: line-through;
  text-decoration-color: rgba(199,59,48,0.6);
  text-decoration-thickness: 2px;
  color: rgba(255,255,255,0.5);
}

/* ---------- Install section ---------- */
.install { background: var(--plume-paper-2); padding: 96px 32px; }
.install-in { max-width: 1100px; margin: 0 auto; }
.install-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px; margin-top: 56px;
}
.install-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: 16px; padding: 32px;
}
.install-card .step {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--plume-blue-600); margin-bottom: 12px;
}
.install-card h3 {
  font-family: var(--font-serif); font-weight: 400;
  font-size: 28px; line-height: 1.18;
  margin: 0 0 14px;
}
.install-card p { color: var(--fg2); font-size: 15px; margin: 0 0 18px; }
.install-card ul { list-style: none; padding: 0; margin: 0; }
.install-card li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px; color: var(--fg1);
}
.install-card li:last-child { border-bottom: none; }
.install-card li strong { color: var(--fg1); font-weight: 600; }
.install-card li code {
  font-family: var(--font-mono); font-size: 12px;
  background: var(--plume-paper-2);
  padding: 2px 6px; border-radius: 4px;
}

/* ---------- Code block (the prompt) ---------- */
.code-wrap {
  margin-top: 56px; background: var(--plume-ink-900);
  border-radius: 16px; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.code-bar {
  background: var(--plume-ink-800);
  padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.code-bar .label {
  font-size: 12px; color: rgba(255,255,255,0.6);
  font-family: var(--font-mono);
}
.copy-btn {
  background: var(--plume-blue-500); color: #fff;
  border: none; padding: 8px 14px; border-radius: 8px;
  font-family: inherit; font-size: 13px; font-weight: 500;
  cursor: pointer; transition: background 140ms var(--ease-out);
}
.copy-btn:hover { background: var(--plume-blue-400); }
.copy-btn.copied { background: var(--success-500); }
pre.code {
  margin: 0; padding: 24px;
  font-family: var(--font-mono); font-size: 13px;
  line-height: 1.6; color: #EEF0F4;
  max-height: 520px; overflow: auto; white-space: pre-wrap;
}

/* ---------- FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}
.faq-item h3 {
  font-family: var(--font-sans); font-size: 17px; font-weight: 600;
  margin: 0 0 10px; color: var(--fg1);
}
.faq-item p { font-size: 15px; color: var(--fg2); line-height: 1.6; margin: 0; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 32px; max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
  flex-wrap: wrap;
}
footer .brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-serif); font-size: 18px; color: var(--fg1);
}
footer .copy { font-size: 12px; color: var(--fg3); }
footer .links { display: flex; gap: 24px; font-size: 13px; }
footer .links a { color: var(--fg2); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .preview-body { grid-template-columns: 1fr; padding: 24px; }
  .feature-grid { grid-template-columns: 1fr; }
  .voice-grid { grid-template-columns: 1fr; }
  .install-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 24px 48px; }
  .section, .voice, .install { padding: 64px 24px; }
}