/* ChciHry.cz — Piškvorky online. Standalone styl (bez styles.css/normalize.css).
 * Tokeny převzaty z vizuální identity webu. Animace pouze transform/opacity/filter. */

/* ---------- mini-reset + tokeny ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* Fallback s metrikami Montserratu — font-swap bez layout shiftu (CLS) */
@font-face {
    font-family: 'Montserrat-fallback';
    src: local('Arial');
    size-adjust: 112.5%;
    ascent-override: 86%;
    descent-override: 22%;
    line-gap-override: 0%;
}

:root {
    color-scheme: light only;
    --primary: #D4AF37;
    --primary-dark: #B8941F;
    --surface-dark: #020617;
    --surface: #0F172A;
    --surface-light: #1E293B;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #64748B;
    --danger: #D9534F;
    --success: #5CB85C;
    --gold-border: rgba(212, 175, 55, 0.2);
    --radius-sm: 0.375rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --line: rgba(212, 175, 55, 0.18);
    --cell-bg: #131c2e;
    --cell-bg2: #0d1424;
    --board: min(100vw - 1rem, 64svh);
    --n: 15;
}

html { height: 100%; }

body {
    font-family: 'Montserrat', 'Montserrat-fallback', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--surface-dark);
    color: var(--text-primary);
    min-height: 100svh;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 20% 15%, rgba(212, 175, 55, 0.07) 0%, transparent 45%),
        radial-gradient(circle at 85% 80%, rgba(91, 200, 232, 0.05) 0%, transparent 50%);
}

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
svg { display: block; }

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- herní layout (shell = container) ---------- */
.shell {
    container-type: inline-size;
    container-name: app;
    padding: max(0.5rem, env(safe-area-inset-top)) max(0.5rem, env(safe-area-inset-right))
             0.5rem max(0.5rem, env(safe-area-inset-left));
}
.app {
    display: grid;
    grid-template-areas: "head" "board" "panel";
    justify-items: center;
    gap: clamp(0.4rem, 1.2dvh, 1rem);
    max-width: 1400px;
    margin: 0 auto;
}
.hd { grid-area: head; text-align: center; min-width: 0; }
.hd h1 {
    font-size: clamp(1.1rem, 4.2vw, 2rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--primary) 0%, #F5E6D3 55%, var(--primary-dark) 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.hd .h1-sub { font-weight: 600; font-size: 0.7em; white-space: nowrap; }
.status {
    margin-top: 0.2rem;
    font-size: clamp(0.85rem, 2.6vw, 1.05rem);
    font-weight: 600;
    color: var(--text-secondary);
    min-height: 1.4em;
}
.status.thinking { color: var(--primary); }
.status.hint { color: #5BC8E8; }
.status.over { color: var(--primary); }

/* ---------- pole ---------- */
.board-zone { grid-area: board; min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }

.board-wrap {
    position: relative;
    width: var(--board);
    aspect-ratio: 1;
    border: 3px solid var(--primary-dark);
    outline: 1px solid rgba(212, 175, 55, 0.45);
    border-radius: var(--radius-sm);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 60px rgba(212, 175, 55, 0.07);
    background: var(--line);
    /* dvojklik-zoom pryč; netáhne se, scroll po stránce zůstává */
    touch-action: manipulation;
    -webkit-user-select: none; user-select: none;
}
.board {
    display: grid;
    grid-template-columns: repeat(var(--n), 1fr);
    grid-template-rows: repeat(var(--n), 1fr);
    gap: 1px;                 /* mezery = linky (prosvítá pozadí board-wrap) */
    width: 100%; height: 100%;
}
.cell {
    position: relative;
    background: var(--cell-bg);
    background-image: linear-gradient(135deg, var(--cell-bg), var(--cell-bg2));
}
.cell:focus { outline: none; }
.cell:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; z-index: 3; }

/* poslední tah — prstenec */
.cell.last::after {
    content: ''; position: absolute; inset: 0;
    box-shadow: inset 0 0 0 2px var(--primary);
    pointer-events: none;
}
/* vítězná pětice */
.cell.win { background: rgba(92, 184, 92, 0.28); }
.cell.win .mark { animation: winGlow 0.6s ease-out; }

/* ---------- značky X / O ---------- */
.mark { position: absolute; inset: 9%; display: flex; align-items: center; justify-content: center; pointer-events: none; }
.mark svg { width: 100%; height: 100%; filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.45)); }
.mark.ghost { opacity: 0.4; animation: ghostPulse 1.3s ease-in-out infinite; }
.mark.placing { animation: pop 0.14s ease-out; }

@keyframes pop { 0% { transform: scale(0.55); } 100% { transform: scale(1); } }
@keyframes ghostPulse { 0%, 100% { opacity: 0.32; } 50% { opacity: 0.55; } }
@keyframes winGlow {
    0% { filter: drop-shadow(0 2px 3px rgba(0,0,0,0.45)); }
    40% { filter: drop-shadow(0 0 12px rgba(92,184,92,0.95)); }
    100% { filter: drop-shadow(0 2px 3px rgba(0,0,0,0.45)); }
}

/* ---------- potvrzovací lišta ---------- */
.confirm-bar { display: flex; gap: 0.5rem; }
.confirm-bar[hidden] { display: none; }

/* ---------- panel ---------- */
.panel {
    grid-area: panel;
    display: flex; flex-direction: column; align-items: center;
    gap: 0.5rem; width: 100%;
    max-width: calc(var(--board) + 3px + 1.2rem);
}
.counts { font-weight: 700; font-size: 1rem; color: var(--text-secondary); }
.btns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.45rem; width: 100%; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 44px; min-width: 44px;
    padding: 0.5rem 0.7rem;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), rgba(212, 175, 55, 0.05));
    border: 1px solid var(--gold-border);
    border-radius: 9999px;
    color: var(--text-primary);
    font-size: 0.8rem; font-weight: 600; letter-spacing: 0.02em;
    transition: border-color 0.15s ease, transform 0.15s ease;
    text-align: center;
}
.btn:hover { border-color: var(--primary); transform: translateY(-1px); }
.btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: var(--surface-dark); border-color: var(--primary); }
.btn-primary:hover { border-color: #F5E6D3; }
.btn-ok { background: linear-gradient(135deg, rgba(92,184,92,0.25), rgba(92,184,92,0.12)); border-color: rgba(92,184,92,0.5); }
.btn[hidden] { display: none; }

/* ---------- dialogy ---------- */
dialog.dlg {
    margin: auto;
    max-width: min(92vw, 26rem); width: 100%;
    background: linear-gradient(160deg, rgba(15, 23, 42, 0.97), rgba(2, 6, 23, 0.97));
    color: var(--text-primary);
    border: 1px solid rgba(212, 175, 55, 0.35);
    border-radius: var(--radius-xl);
    padding: 1.3rem;
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.7), 0 0 90px rgba(212, 175, 55, 0.12);
}
dialog.dlg::backdrop { background: rgba(2, 6, 23, 0.72); backdrop-filter: blur(4px); }
.dlg h2 { font-size: 1.25rem; font-weight: 800; margin-bottom: 0.9rem; color: var(--primary); text-align: center; }
.dlg .dlg-text { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.5; text-align: center; }
.dlg fieldset { border: 0; margin-bottom: 0.9rem; }
.dlg legend { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); margin-bottom: 0.4rem; }
.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 0.4rem; }
.seg label {
    display: flex; align-items: center; justify-content: center;
    min-height: 44px; padding: 0.45rem 0.4rem;
    border: 1px solid var(--gold-border); border-radius: var(--radius-lg);
    background: rgba(30, 41, 59, 0.6);
    font-size: 0.82rem; font-weight: 600; text-align: center; cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg input:checked + span { color: var(--primary); }
.seg label:has(input:checked) { border-color: var(--primary); background: rgba(212, 175, 55, 0.14); box-shadow: 0 0 12px rgba(212, 175, 55, 0.25); }
.seg label:has(input:focus-visible) { outline: 2px solid var(--primary); outline-offset: 2px; }
.dlg-actions { display: flex; gap: 0.5rem; justify-content: center; margin-top: 1.1rem; flex-wrap: wrap; }
.dlg-actions .btn { flex: 1 1 auto; }
.dlg .stats-line { text-align: center; margin-top: 0.7rem; color: var(--text-secondary); font-size: 0.9rem; }
.dlg .result-emoji { display: block; text-align: center; font-size: 2.6rem; margin-bottom: 0.4rem; }

/* ---------- toast ---------- */
.toast {
    position: fixed; left: 50%; bottom: max(1rem, env(safe-area-inset-bottom));
    transform: translateX(-50%);
    display: flex; gap: 0.6rem; align-items: center;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.97), rgba(2, 6, 23, 0.97));
    border: 1px solid rgba(212, 175, 55, 0.4); border-radius: 9999px;
    padding: 0.55rem 0.6rem 0.55rem 1rem;
    font-size: 0.85rem; font-weight: 600;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.6);
    z-index: 90; opacity: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.toast[hidden] { display: none; }
.toast.hiding { opacity: 0; transform: translateX(-50%) translateY(10px); }
.toast .btn { min-height: 36px; padding: 0.3rem 0.8rem; font-size: 0.78rem; }

.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 80; }

/* ---------- obsahová sekce (SEO/GEO) ---------- */
.content {
    max-width: 820px; margin: 2.5rem auto 0;
    padding: 0 max(1rem, env(safe-area-inset-right)) 2.5rem max(1rem, env(safe-area-inset-left));
    line-height: 1.65; color: var(--text-secondary);
    content-visibility: auto; contain-intrinsic-size: auto 1200px;
}
.content .answer-first {
    font-size: 1.02rem; color: var(--text-primary);
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--gold-border); border-left: 4px solid var(--primary);
    border-radius: var(--radius-lg); padding: 1rem 1.2rem;
}
.content h2 { font-size: clamp(1.25rem, 3.4vw, 1.6rem); font-weight: 800; color: var(--text-primary); margin: 2.2rem 0 0.8rem; }
.content h3 { font-size: 1.05rem; font-weight: 700; color: var(--primary); margin: 1.3rem 0 0.45rem; }
.content p { margin-bottom: 0.8rem; }
.content ul, .content ol { margin: 0 0 0.9rem 1.4rem; }
.content li { margin-bottom: 0.35rem; }
.content strong { color: var(--text-primary); }
.faq-item { background: rgba(15, 23, 42, 0.85); border: 1px solid var(--gold-border); border-radius: var(--radius-lg); padding: 0.9rem 1.1rem; margin-bottom: 0.7rem; }
.faq-item h3 { margin: 0 0 0.4rem; }
.faq-item p { margin: 0; font-size: 0.95rem; }
.more-games { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0.8rem 0; }
.more-games a { padding: 0.45rem 1rem; background: rgba(212, 175, 55, 0.1); border: 1px solid var(--gold-border); border-radius: 9999px; font-size: 0.875rem; font-weight: 600; transition: border-color 0.15s ease, transform 0.15s ease; }
.more-games a:hover { border-color: var(--primary); transform: translateY(-2px); color: var(--primary); }
.more-games .all { flex-basis: 100%; display: flex; justify-content: center; margin-top: 0.6rem; }
.updated { margin-top: 2rem; font-size: 0.8rem; color: var(--text-muted); }

/* ---------- responzivita ---------- */
/* tablet a výš: větší pole */
@media (min-width: 768px) {
    :root { --board: min(80svh, 720px); }
    .btns { grid-template-columns: repeat(3, minmax(7rem, 1fr)); }
}
@media (min-width: 1024px) {
    :root { --board: min(80svh, calc(100vw - 360px), 760px); }
}

/* desktop: panel vpravo od pole (container query na shellu) */
@container app (min-width: 1024px) {
    .app {
        grid-template-areas: "head head" "board panel";
        grid-template-columns: auto minmax(220px, 280px);
        align-items: start; justify-content: center; justify-items: stretch;
        column-gap: 1.5rem;
    }
    .hd { justify-self: center; }
    .panel { max-width: none; position: sticky; top: 1rem; }
    .btns { grid-template-columns: 1fr; }
    .counts { font-size: 1.15rem; padding: 0.4rem 0; }
}

/* mobil landscape: pole vlevo, hlavička + ovládání vpravo, bez scrollu */
@media (max-height: 500px) and (orientation: landscape) {
    :root { --board: min(92svh - 2rem, calc(100vw - 250px)); }
    .app {
        grid-template-areas: "board head" "board panel";
        grid-template-columns: auto 1fr;
        grid-template-rows: auto 1fr;
        column-gap: 1rem; align-items: start;
    }
    .hd h1 { font-size: 1rem; }
    .hd .h1-sub { display: block; font-size: 0.68rem; }
    .panel { max-width: 320px; justify-self: center; }
    .btns { grid-template-columns: repeat(2, 1fr); gap: 0.35rem; }
    .btn { min-height: 40px; font-size: 0.72rem; }
}

/* widescreen / 4K */
@media (min-width: 2560px) {
    :root { --board: min(80svh, 1000px); }
    .content { max-width: 1000px; font-size: 1.1rem; }
}

/* ---------- omezený pohyb ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}