/* ============================================================
   TabMargin — marketing site (tabmargin.com)
   Standalone (no build, no shared deps). Palette mirrors the app's
   tokens.css for brand consistency; kept inline here so the landing
   deploys as a self-contained Cloudflare Pages project.
   ============================================================ */

:root {
  --bg-canvas: #f7f3ec;
  --bg-recessed: #efeae0;
  --bg-elevated: #fcf9f3;
  --ink-primary: #2a2520;
  --ink-secondary: #6f6055;
  --ink-tertiary: #9d9181;
  --accent: #b87055;
  --accent-hover: #a35f47;
  --accent-soft: #e8d5cc;
  --on-accent: #fff7ef;
  --grain-opacity: 0.035;
  --grain-blend: multiply;

  --font-ui: 'Manrope', ui-sans-serif, system-ui, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-canvas: #1a1612;
    --bg-recessed: #141008;
    --bg-elevated: #221d17;
    --ink-primary: #ebe2d4;
    --ink-secondary: #8a7e72;
    --ink-tertiary: #5a5048;
    --accent: #d99373;
    --accent-hover: #c98365;
    --accent-soft: #3a2820;
    --on-accent: #2a1f18;
    --grain-opacity: 0.05;
    --grain-blend: screen;
  }
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-ui);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.005em;
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Paper grain — same texture as the app */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: var(--grain-opacity);
  mix-blend-mode: var(--grain-blend);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='280' height='280'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ----- Nav ----- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
}

.wordmark {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
  text-decoration: none;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-link:hover { color: var(--ink-primary); background-color: var(--bg-elevated); }

/* ----- Hero ----- */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding: 80px 0 96px;
}

.hero-copy { max-width: 480px; }

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink-primary);
  margin-bottom: 22px;
}

.lede {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-secondary);
  margin-bottom: 36px;
}

.cta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 13px 22px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.15s var(--ease);
}

.btn-primary { color: var(--on-accent); background-color: var(--accent); }
.btn-primary:hover { background-color: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost { color: var(--ink-secondary); background-color: transparent; padding: 13px 16px; }
.btn-ghost:hover { color: var(--ink-primary); background-color: var(--bg-elevated); }

.cta-note {
  font-size: 13px;
  color: var(--ink-tertiary);
  margin-top: 18px;
}

/* ----- Hero visual: a floating note card ----- */
.hero-visual {
  display: flex;
  justify-content: center;
}

.note-card {
  width: 100%;
  max-width: 420px;
  background-color: var(--bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(40, 30, 20, 0.12), 0 4px 12px rgba(40, 30, 20, 0.06);
  padding: 28px 30px 24px;
  transform: rotate(-1.2deg);
}

.note-card .card-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--ink-primary);
}

.note-line {
  height: 9px;
  border-radius: 4px;
  background-color: var(--bg-recessed);
  margin-bottom: 13px;
}
.note-line.short { width: 52%; }
.note-line.medium { width: 78%; }
.note-line.accent { background-color: var(--accent-soft); width: 38%; }

.card-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-size: 12px;
  color: var(--ink-tertiary);
}

.card-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ----- Feature row ----- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding: 16px 0 96px;
}

.feature h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
  color: var(--ink-primary);
}

.feature p {
  font-size: 14px;
  color: var(--ink-secondary);
  line-height: 1.55;
}

/* ----- Footer ----- */
.footer {
  border-top: 1px solid var(--bg-recessed);
  padding: 28px 0 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-tertiary);
  flex-wrap: wrap;
  gap: 12px;
}

.footer a { color: var(--ink-secondary); text-decoration: none; }
.footer a:hover { color: var(--ink-primary); }

::selection { background-color: var(--accent-soft); color: var(--ink-primary); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--radius-sm); }

/* ----- Responsive ----- */
@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 48px 0 64px;
  }
  .hero-visual { order: -1; }
  .note-card { transform: rotate(-1deg); max-width: 360px; }
  .features { grid-template-columns: 1fr; gap: 20px; padding-bottom: 64px; }
}