:root {
  color-scheme: dark;
  --bg: #07101f;
  --bg-2: #10172d;
  --panel: rgba(255,255,255,.08);
  --panel-strong: rgba(255,255,255,.14);
  --text: #f4f7fb;
  --muted: #aab7cc;
  --line: rgba(255,255,255,.16);
  --brand: #58f7d0;
  --brand-2: #7c5cff;
  --accent: #ffbe55;
  --danger: #ff718b;
  --ok: #7dffbd;
  --shadow: 0 24px 80px rgba(0,0,0,.35);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius: 16px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f7fb;
  --bg-2: #ffffff;
  --panel: rgba(255,255,255,.88);
  --panel-strong: rgba(255,255,255,.98);
  --text: #111827;
  --muted: #526173;
  --line: rgba(15,23,42,.14);
  --brand: #0f9f85;
  --brand-2: #5842d5;
  --accent: #b66a00;
  --danger: #c7254e;
  --ok: #087d4d;
  --shadow: 0 18px 54px rgba(15,23,42,.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 15px; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 5%, rgba(88,247,208,.22), transparent 28rem),
    radial-gradient(circle at 85% 15%, rgba(124,92,255,.24), transparent 30rem),
    radial-gradient(circle at 55% 85%, rgba(255,190,85,.16), transparent 28rem),
    linear-gradient(145deg, var(--bg), var(--bg-2));
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled, input:disabled, select:disabled { cursor: not-allowed; opacity: .58; }
a { color: var(--brand); }

.skip-link {
  position: absolute;
  transform: translateY(-140%);
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: .75rem 1rem;
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
}
.skip-link:focus { transform: translateY(0); }

.shell { width: min(1220px, calc(100% - 28px)); margin: 0 auto; padding: 22px 0 56px; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}
.logo { display: flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: -.03em; }
.logo-mark {
  display: grid; place-items: center;
  width: 46px; height: 46px; border-radius: 16px;
  background: linear-gradient(135deg, #12172a, #1d2742);
  box-shadow: var(--shadow);
  color: #061020;
}
.logo-mark img { width: 34px; height: 34px; object-fit: contain; }
.brand-row { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.brand-row .fifa-mark { height: 20px; width: auto; }
.brand-row .wc-mark { height: 42px; width: auto; }
[data-theme="light"] .brand-row img { background: #12172a; border-radius: 10px; padding: 6px 9px; box-sizing: content-box; }
.logo small { display: block; color: var(--muted); font-weight: 650; letter-spacing: 0; }
.top-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }

.hero {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 24px;
  align-items: stretch;
}
.card, .hero-card, .panel {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  border-radius: var(--radius-xl);
}
.hero-card { padding: clamp(24px, 4vw, 52px); position: relative; overflow: hidden; }
.hero-card::after {
  content: "";
  position: absolute; inset: auto -120px -130px auto;
  width: 330px; height: 330px; border-radius: 50%;
  background: radial-gradient(circle, rgba(88,247,208,.34), transparent 65%);
  pointer-events: none;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.06);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-weight: 750;
  margin-bottom: 18px;
}
h1 { font-size: clamp(1.9rem, 4.2vw, 3.3rem); line-height: 1.02; margin: 0 0 16px; letter-spacing: -.045em; }
h2 { font-size: clamp(1.2rem, 2vw, 1.55rem); margin: 0 0 12px; letter-spacing: -.03em; }
h3 { margin: 0 0 8px; letter-spacing: -.02em; }
p { color: var(--muted); line-height: 1.58; }
.lead { font-size: 1rem; max-width: 68ch; }
.hero-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 22px; }
.stat {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: rgba(255,255,255,.07); padding: 14px;
}
.stat b { display: block; font-size: 1.35rem; }
.stat span { color: var(--muted); font-size: .9rem; }
.forms { display: grid; gap: 14px; }
.panel { padding: 20px; }
.form-grid { display: grid; gap: 12px; }
.two { grid-template-columns: 1fr 1fr; }
.three { grid-template-columns: repeat(3, 1fr); }
label { display: grid; gap: 7px; color: var(--muted); font-weight: 760; font-size: .93rem; }
input, select, textarea {
  width: 100%; min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(0,0,0,.18);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}
[data-theme="light"] input, [data-theme="light"] select, [data-theme="light"] textarea { background: rgba(255,255,255,.86); }
input:focus, select:focus, textarea:focus, button:focus-visible, a:focus-visible {
  outline: 3px solid color-mix(in oklab, var(--brand), white 20%);
  outline-offset: 2px;
}
.help { color: var(--muted); font-size: .9rem; }

.btn, .ghost, .danger, .okbtn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 16px;
  color: var(--text);
  background: rgba(255,255,255,.08);
  text-decoration: none;
  font-weight: 850;
}
.btn { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #061020; border-color: transparent; }
.okbtn { background: color-mix(in oklab, var(--ok), transparent 76%); color: var(--ok); }
.danger { background: color-mix(in oklab, var(--danger), transparent 82%); color: var(--danger); }
.ghost:hover, .btn:hover, .danger:hover, .okbtn:hover { transform: translateY(-1px); }

.app-grid { display: grid; grid-template-columns: 300px 1fr; gap: 18px; align-items: start; }
.sidebar { position: sticky; top: 16px; display: grid; gap: 12px; }
.room-card { padding: 18px; }
.room-card p { overflow-wrap: anywhere; }
.code {
  display: inline-flex; padding: 8px 12px; border-radius: 12px;
  background: rgba(88,247,208,.14); color: var(--brand); font-weight: 950; letter-spacing: .08em;
}
.tabs { display: grid; gap: 8px; }
.tab {
  width: 100%; justify-content: flex-start;
  border-radius: 16px;
  background: transparent;
}
.tab.active { background: var(--panel-strong); border-color: color-mix(in oklab, var(--brand), transparent 40%); }
.content { display: grid; gap: 16px; }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.summary-card { padding: 16px; border-radius: 20px; border: 1px solid var(--line); background: var(--panel); }
.summary-card b { display: block; font-size: 1.45rem; }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; justify-content: space-between; }
.toolbar .filters { display: grid; grid-template-columns: 150px 150px 170px minmax(180px, 1fr); gap: 10px; flex: 1; }
.matches { display: grid; gap: 12px; }
.match-card {
  display: grid; gap: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.1), rgba(255,255,255,.055));
  padding: 16px;
}
.match-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge { padding: 5px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); font-size: .78rem; font-weight: 850; }
.badge.ok { color: var(--ok); border-color: color-mix(in oklab, var(--ok), transparent 45%); }
.badge.warn { color: var(--accent); border-color: color-mix(in oklab, var(--accent), transparent 45%); }
.teams { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: center; font-size: 1.05rem; font-weight: 900; }
.teams .away { text-align: right; }
.team { display: inline-flex; align-items: center; gap: 8px; min-width: 0; }
.teams .team.away { justify-content: flex-end; }
.team-name { min-width: 0; overflow-wrap: anywhere; }
.flag { width: 24px; height: 17px; object-fit: cover; border-radius: 3px; border: 1px solid var(--line); flex: none; background: rgba(0,0,0,.15); }
.flag.sm { width: 18px; height: 13px; vertical-align: -2px; display: inline-block; }
.vs { color: var(--muted); font-weight: 800; }
.pred-form { display: flex; gap: 10px; align-items: end; flex-wrap: wrap; }
.score-inputs { display: flex; align-items: center; gap: 8px; }
.score-inputs input { width: 78px; text-align: center; font-size: 1.1rem; font-weight: 900; }
.advancer-pick { font-size: .85rem; min-width: 165px; max-width: 230px; }
.advancer-pick select { min-height: 40px; }

/* Tooltip (i) de llaves del cuadro eliminatorio */
.tip { position: relative; display: inline-flex; flex: none; }
.info-icon {
  display: grid; place-items: center;
  width: 16px; height: 16px; border-radius: 50%;
  border: 1px solid color-mix(in oklab, var(--brand), transparent 30%);
  color: var(--brand);
  font-size: .68rem; font-weight: 900; font-style: italic;
  cursor: help; line-height: 1;
}
.tip .tip-body {
  display: none;
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  width: max-content; max-width: 250px;
  padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--bg-2); color: var(--text);
  box-shadow: var(--shadow);
  font-size: .85rem; font-weight: 550; text-align: left;
  z-index: 60;
}
.tip:hover .tip-body, .tip:focus .tip-body, .tip:focus-within .tip-body { display: block; }
.tip-body b { display: block; color: var(--text); }
.tip-table { border-collapse: collapse; margin-top: 8px; min-width: 0; width: 100%; }
.tip-table caption { text-align: left; color: var(--muted); font-size: .75rem; padding-bottom: 4px; }
.tip-table td { padding: 3px 6px 3px 0; border-bottom: 0; font-size: .85rem; color: var(--muted); }
.tip-match { margin-top: 8px; color: var(--muted); }
.visible-picks { display: flex; flex-wrap: wrap; gap: 8px; }
.pick-chip { border: 1px solid var(--line); border-radius: 999px; padding: 6px 9px; background: rgba(0,0,0,.12); color: var(--muted); }
.pick-chip b { color: var(--text); }
.lock-note { color: var(--muted); font-size: .92rem; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { text-align: left; padding: 12px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-size: .86rem; text-transform: uppercase; letter-spacing: .04em; }
tr:last-child td { border-bottom: 0; }
.podium { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.podium-card { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 18px; background: var(--panel); }
.podium-card:first-child { background: linear-gradient(160deg, color-mix(in oklab, var(--accent), transparent 70%), var(--panel)); }

.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.result-row { display: grid; grid-template-columns: minmax(170px, 1fr) 78px 78px 130px auto; gap: 8px; align-items: end; padding: 10px 0; border-bottom: 1px solid var(--line); }
.result-row:last-child { border-bottom: 0; }
.participant-row { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.audit { display: grid; gap: 8px; max-height: 300px; overflow: auto; }
.audit-item { padding: 10px; border-radius: 14px; background: rgba(0,0,0,.12); border: 1px solid var(--line); }

.empty { text-align: center; padding: 28px; color: var(--muted); border: 1px dashed var(--line); border-radius: var(--radius-lg); }
.toast {
  position: fixed; left: 50%; bottom: 18px; transform: translate(-50%, 160%);
  max-width: min(560px, calc(100% - 28px));
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--panel-strong); color: var(--text); padding: 12px 16px; box-shadow: var(--shadow);
  transition: transform .2s ease;
  z-index: 100;
}
.toast.show { transform: translate(-50%, 0); }
.toast.error { color: var(--danger); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.nowrap { white-space: nowrap; }

@media (max-width: 980px) {
  .hero, .app-grid, .admin-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .tabs { grid-template-columns: repeat(2, 1fr); }
  .summary-grid, .hero-grid { grid-template-columns: repeat(2, 1fr); }
  .toolbar .filters { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .shell { width: min(100% - 18px, 1220px); padding-top: 12px; }
  .topbar, .match-head { align-items: stretch; flex-direction: column; }
  .top-actions { justify-content: stretch; }
  .top-actions > * { flex: 1; }
  .two, .three, .summary-grid, .hero-grid, .podium, .toolbar .filters { grid-template-columns: 1fr; }
  h1 { font-size: 2rem; }
  .hero-card, .panel { border-radius: 22px; padding: 16px; }
  .teams { grid-template-columns: 1fr; gap: 3px; }
  .teams .away { text-align: left; }
  .teams .team.away { justify-content: flex-start; }
  .teams .vs { display: none; }
  .tip .tip-body { left: 0; transform: none; max-width: min(250px, 78vw); }
  .pred-form, .score-inputs { width: 100%; }
  .score-inputs input { flex: 1; }
  .result-row { grid-template-columns: 1fr 70px 70px; }
  .result-row button, .result-row label:nth-child(4) { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

.secret-codes { display: grid; gap: 8px; margin: 14px 0; }
.code-row {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto minmax(130px, auto);
  gap: 8px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0,0,0,.12);
}
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .08em;
  color: var(--brand);
  font-weight: 900;
}
label span { display: inline-flex; gap: 8px; align-items: center; }
label span input[type="checkbox"] { width: auto; min-height: 0; }
@media (max-width: 640px) {
  .code-row { grid-template-columns: 1fr; }
}

.notice {
  border: 1px solid color-mix(in oklab, var(--brand), transparent 55%);
  background: color-mix(in oklab, var(--brand), transparent 88%);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--text);
}
.winner-hero {
  position: relative;
  overflow: hidden;
  border: 1px solid color-mix(in oklab, var(--brand), transparent 45%);
  border-radius: var(--radius-xl);
  padding: 24px;
  margin: 14px 0;
  background:
    radial-gradient(circle at top right, color-mix(in oklab, var(--accent), transparent 62%), transparent 40%),
    linear-gradient(135deg, color-mix(in oklab, var(--panel-strong), transparent 0%), color-mix(in oklab, var(--brand), transparent 82%));
  box-shadow: var(--shadow);
}
.winner-hero.final {
  border-color: color-mix(in oklab, var(--ok), transparent 40%);
  background:
    radial-gradient(circle at top right, color-mix(in oklab, var(--ok), transparent 62%), transparent 40%),
    linear-gradient(135deg, color-mix(in oklab, var(--panel-strong), transparent 0%), color-mix(in oklab, var(--brand), transparent 84%));
}
.winner-hero h1 { margin: 8px 0 12px; }
.winner-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0; }
.winner-chip {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 12px;
  background: rgba(255,255,255,.07);
}
.final-acta {
  margin-top: 16px;
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(0,0,0,.08);
}
.podium.winners { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.result-row { grid-template-columns: minmax(210px, 1fr) 78px 78px 130px minmax(180px, 1fr) auto; }
.result-row .pens { grid-column: 1 / -1; }
.result-row .pens input { width: 78px; }
@media (max-width: 640px) {
  .result-row { grid-template-columns: 1fr 70px 70px; }
  .result-row button, .result-row label:nth-child(4), .result-row label:nth-child(5) { grid-column: 1 / -1; }
}