:root {
  --bg: #f4f8fb;
  --panel: #fff;
  --text: #102536;
  --muted: #536a79;
  --brand: #075985;
  --brand2: #0f766e;
  --ink: #082536;
  --line: #d6e2e9;
  --focus: #f59e0b;
  --shadow: 0 18px 50px rgba(15, 35, 55, .10);
}
[data-theme=dark] {
  --bg: #0b1220;
  --panel: #111c2e;
  --text: #edf6ff;
  --muted: #b8c7d9;
  --brand: #7dd3fc;
  --brand2: #5eead4;
  --ink: #edf6ff;
  --line: #304158;
  --shadow: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 18px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }
.container { max-width: 1180px; margin: auto; padding: 2rem; }
.skip { position: absolute; left: -999px; top: 0; background: var(--focus); color: #111; padding: .75rem; z-index: 10; }
.skip:focus { left: 1rem; }
a { color: var(--brand); }
:focus-visible { outline: 4px solid var(--focus); outline-offset: 3px; }
.site-header { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--panel) 94%, transparent); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); padding: 1rem 2rem; display: flex; gap: 1rem; align-items: center; justify-content: space-between; }
.brand { display: flex; gap: .8rem; align-items: center; }
.brand > span { display: grid; place-items: center; width: 3rem; height: 3rem; border-radius: 1rem; background: linear-gradient(135deg, var(--brand), var(--brand2)); color: #fff; font-weight: 800; }
.brand small { display: block; color: var(--muted); }
nav { display: flex; gap: .5rem; flex-wrap: wrap; }
nav a, button, .btn { border: 1px solid var(--line); background: var(--panel); color: var(--text); border-radius: .8rem; padding: .7rem .9rem; text-decoration: none; cursor: pointer; font: inherit; }
.btn, button:hover, nav a:hover { background: var(--brand); color: white; }
.secondary { background: transparent; }
.progress-wrap { display: none; padding: .75rem 2rem; background: var(--panel); border-bottom: 1px solid var(--line); }
.technical-progress .progress-wrap { display: block; }
.progress { height: .7rem; background: var(--line); border-radius: 2rem; overflow: hidden; }
.progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--brand), var(--brand2)); width: 0; }
.hero { padding: 4.5rem 0 2.5rem; max-width: 1000px; }
.hero h1 { font-size: clamp(2.5rem, 6vw, 5.6rem); line-height: .98; letter-spacing: -.045em; margin: .3rem 0; }
.eyebrow, .badge, .section-kicker { color: var(--brand2); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; }
.lead { font-size: clamp(1.15rem, 2vw, 1.45rem); line-height: 1.5; color: var(--ink); }
.grid { display: grid; gap: 1.25rem; }
.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 1.25rem; padding: 1.5rem; box-shadow: var(--shadow); margin-bottom: 1.25rem; }
.card h2 { line-height: 1.2; }
.toolbar { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.toolbar input, .toolbar select { width: 100%; padding: .75rem; border: 1px solid var(--line); border-radius: .7rem; background: var(--panel); color: var(--text); font: inherit; }
details { border: 1px solid var(--line); border-radius: 1rem; padding: 1rem; margin: 1rem 0; background: color-mix(in srgb, var(--panel) 92%, var(--brand) 8%); }
summary { font-weight: 800; cursor: pointer; min-height: 44px; }
.feedback { border-left: 6px solid var(--brand2); padding: 1rem; background: color-mix(in srgb, var(--panel) 85%, var(--brand2) 15%); border-radius: .5rem; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { border: 1px solid var(--line); padding: .7rem; text-align: left; vertical-align: top; }
.download { display: block; padding: .6rem 0; }
.site-footer { padding: 2rem; text-align: center; color: var(--muted); }
.presentation .site-header, .presentation .progress-wrap { display: none; }
.presentation .container { max-width: 1400px; }
.presentation .card { font-size: 1.35rem; }
@media (max-width: 800px) {
  body { font-size: 16px; }
  .site-header { position: static; display: block; padding: 1rem; }
  .two, .three { grid-template-columns: 1fr; }
  .container { padding: 1rem; }
  .hero { padding-top: 2.5rem; }
  nav { margin-top: 1rem; }
  nav a, button { width: 100%; text-align: center; }
  table { display: block; overflow-x: auto; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}