shared/theme.css

/*
  Shared design system for the ml-portfolio-suite projects.

  One base system (typography scale, spacing, shadows, motion) shared by
  all 5 projects -- Apple/Meta marketing-site inspired: system font stack,
  large confident headlines, generous whitespace, soft shadows instead of
  borders, subtle motion on interaction. Each project sets its own
  --accent / --accent-dark by overriding the variables below in its own
  <style> block, so the suite reads as one family with five distinct
  identities rather than five unrelated demos.
*/

:root {
  /* ---- accent (overridden per-project) ---- */
  --accent: #0071e3;
  --accent-dark: #0058b0;
  --accent-soft: rgba(0, 113, 227, 0.10);

  /* ---- neutrals ---- */
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.05);

  /* ---- type ---- */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;

  /* ---- spacing / radius ---- */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-alt: #0a0a0c;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --border: rgba(255, 255, 255, 0.10);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

.suite-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.suite-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 590;
  letter-spacing: -0.01em;
}

.suite-nav .brand { display: flex; align-items: center; gap: 8px; font-weight: 650; }
.suite-nav .brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
.suite-nav .links { display: flex; gap: 22px; opacity: 0.75; }
.suite-nav .links a:hover { opacity: 1; color: var(--accent); }

.hero {
  padding: 96px 32px 64px;
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.01em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(34px, 6vw, 64px);
  font-weight: 680;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 18px;
  background: linear-gradient(180deg, var(--text) 60%, var(--text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.lede {
  font-size: clamp(16px, 2vw, 21px);
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 640px;
  margin: 0 auto;
  font-weight: 420;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 32px 96px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 32px;
  transition: box-shadow 0.4s var(--ease), transform 0.4s var(--ease);
}

.panel:hover { box-shadow: var(--shadow-lg); }

.grid-2 { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 860px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
  box-shadow: 0 6px 20px -6px var(--accent);
}
.btn:hover { transform: translateY(-1px); background: var(--accent-dark); }
.btn:active { transform: translateY(0); }
.btn.secondary {
  background: var(--bg-alt);
  color: var(--text);
  box-shadow: none;
  border: 1px solid var(--border);
}
.btn.secondary:hover { background: var(--surface); border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat .value { font-size: 32px; font-weight: 680; letter-spacing: -0.02em; color: var(--accent); font-variant-numeric: tabular-nums; }
.stat .label { font-size: 13px; color: var(--text-secondary); font-weight: 560; text-transform: uppercase; letter-spacing: 0.04em; }

.card {
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  padding: 22px;
  border: 1px solid var(--border);
}

.section-title {
  font-size: 28px;
  font-weight: 660;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}
.section-sub { color: var(--text-secondary); font-size: 15px; margin: 0 0 28px; max-width: 620px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 650;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-alt);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.badge.live { color: #17a34a; background: rgba(23, 163, 74, 0.1); border-color: rgba(23, 163, 74, 0.25); }
.badge.live .dot { width: 6px; height: 6px; border-radius: 50%; background: #17a34a; animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

pre.code {
  background: #0d1117;
  color: #c9d1d9;
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  overflow-x: auto;
  line-height: 1.6;
}

footer.suite-footer {
  text-align: center;
  padding: 48px 32px 80px;
  color: var(--text-secondary);
  font-size: 13px;
}
footer.suite-footer a { color: var(--accent); text-decoration: none; }

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.fade-in { animation: fadeIn 0.6s var(--ease) both; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }