/* Ear4AI — prezentační web. Tmavý vzhled jako appka (web/wwwroot/index.html), akcent #d9a441. */
:root {
  --bg: #121212;
  --surface: #1c1c1e;
  --surface-2: #26262a;
  --line: #34343a;
  --txt: #ececec;
  --muted: #a8a8ad;
  --accent: #d9a441;
  --accent-hi: #f4c56b;
  --on-accent: #17130a;
  --radius: 16px;
  --wrap: 1120px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--accent-hi); text-underline-offset: 3px; }
a:hover { color: #ffd98c; }
:focus-visible { outline: 3px solid var(--accent-hi); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: 20px; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 10; background: var(--accent); color: var(--on-accent);
  padding: 8px 14px; border-radius: 8px; font-weight: 700; }
.skip:focus { left: 8px; }

/* Hlavička */
.top { position: sticky; top: 0; z-index: 5; background: rgba(18,18,18,.88);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--txt); text-decoration: none; font-weight: 800; font-size: 1.2rem; }
.brand img { width: 36px; height: 36px; }
.brand:hover { color: var(--txt); }
.nav { display: flex; gap: 4px 18px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: .95rem; padding: 6px 0; }
.nav a:hover { color: var(--txt); }
.nav .lang { border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; color: var(--txt); }
@media (max-width: 720px) {
  .nav .hide-sm { display: none; }
}

/* Tlačítka */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 22px; border-radius: 999px;
  font-weight: 700; text-decoration: none; border: 1px solid transparent; line-height: 1.2; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hi); color: var(--on-accent); }
.btn-ghost { border-color: var(--line); color: var(--txt); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--txt); }
.btn[aria-disabled="true"] { opacity: .6; pointer-events: none; }

/* Úvod */
.hero { padding-block: clamp(48px, 9vw, 110px) clamp(40px, 7vw, 80px);
  background: radial-gradient(1000px 500px at 85% -10%, rgba(217,164,65,.20), transparent 60%); }
.hero .wrap { display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; align-items: center; }
.hero .lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--muted); max-width: 36em; }
.hero .lead strong { color: var(--txt); }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.hero-art { justify-self: center; width: min(320px, 70vw); filter: drop-shadow(0 30px 60px rgba(200,128,42,.35)); }
.kicker { color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; margin-bottom: 14px; }
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 32px; }
  .hero-art { order: -1; width: 140px; justify-self: start; }
}

/* Sekce */
section { padding-block: clamp(48px, 8vw, 88px); scroll-margin-top: 64px; }
section + section { border-top: 1px solid var(--line); }
.section-lead { color: var(--muted); max-width: 44em; font-size: 1.08rem; margin-bottom: 32px; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card .ico { font-size: 1.8rem; line-height: 1; margin-bottom: 12px; display: block; }
.card.path { padding: 28px; }
.card.path h3 { font-size: 1.4rem; }
.card.path .who { color: var(--accent); font-weight: 700; font-size: .92rem; margin-bottom: 8px; }
.card ul { padding-left: 1.2em; margin: 0 0 1em; }
.card li { margin-bottom: .35em; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 4px 0 16px; font-size: .92rem; }
.flow span { background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; }
.flow i { font-style: normal; color: var(--accent); }

.tiers { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin-bottom: 16px; }
.tier { background: var(--surface-2); border-radius: 12px; padding: 12px 14px; }
.tier b { display: block; }
.tier span { color: var(--muted); font-size: .9rem; }

/* Ke stažení */
.dl { display: flex; flex-direction: column; }
.dl .btn { align-self: flex-start; margin-top: auto; }
.dl .meta { color: var(--muted); font-size: .88rem; margin: 10px 0 0; }
.badge { display: inline-block; font-size: .78rem; font-weight: 700; color: var(--on-accent); background: var(--accent);
  border-radius: 999px; padding: 2px 10px; margin-left: 6px; vertical-align: middle; }
.badge.soon { background: var(--surface-2); color: var(--accent-hi); border: 1px solid var(--accent); }

/* K doplnění (místa v hranatých závorkách) */
.todo { background: rgba(255, 196, 0, .16); color: #ffd36b; border: 1px dashed #ffc400; border-radius: 6px;
  padding: 0 6px; font-weight: 600; }

/* Zásady */
.doc { max-width: 820px; padding-block: 48px 72px; }
.doc h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
.doc h2 { font-size: 1.45rem; margin-top: 2em; }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: .5em; }
.note { border-left: 4px solid var(--accent); background: var(--surface); padding: 14px 18px; border-radius: 0 12px 12px 0; margin: 24px 0; }
.table-scroll { overflow-x: auto; margin: 16px 0 24px; border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; min-width: 620px; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--line); }
th { background: var(--surface-2); }
tr:last-child td { border-bottom: 0; }
code { background: var(--surface-2); padding: 1px 6px; border-radius: 6px; font-size: .9em; }

/* Patička */
.foot { border-top: 1px solid var(--line); padding-block: 36px 48px; color: var(--muted); font-size: .92rem; }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; align-items: flex-start; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.foot a { color: var(--muted); }
.foot a:hover { color: var(--txt); }

/* Tabulka zásad na telefonu: řádky pod sebou místo posouvání do strany. */
@media (max-width: 640px) {
  .table-scroll { overflow: visible; border: 0; }
  table, thead, tbody, tr, th, td { display: block; min-width: 0; }
  thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  tr { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; overflow: hidden; }
  tbody th { background: var(--surface-2); }
  td { border-bottom: 0; padding-top: 6px; }
  td::before { content: attr(data-label); display: block; color: var(--accent); font-size: .78rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .08em; margin-bottom: 2px; }
}