/* ChciHry.cz — Housenka (Snake). Standalone styl; sdílené tokeny + reset + @font-face
 * fallback viz css/tokens.css (načíst PŘED tímto souborem). Vizuál sjednocen s ostatními
 * hrami (2048/Pexeso/Lodě) — barvy z tokenů, jen herně specifické :root níže.
 * Plocha je <canvas> (kreslí JS); animace v klidu = 0 (event-driven, žádná CSS smyčka). */

:root {
    /* herně specifické */
    --board-cap: 640px;          /* strop hrany hrací plochy na velkých displejích */
}

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: 100dvh;
    overflow-x: hidden;
    -webkit-user-select: none; -moz-user-select: none; user-select: none;
    -webkit-tap-highlight-color: transparent;
    background-image:
        radial-gradient(circle at 18% 12%, rgba(212, 175, 55, 0.07) 0%, transparent 45%),
        radial-gradient(circle at 85% 85%, rgba(124, 179, 66, 0.06) 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); }

.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 viewport ---------- */
.app {
    box-sizing: border-box;
    height: 100dvh;
    display: grid;
    grid-template-areas: "head" "board";
    grid-template-rows: auto minmax(0, 1fr);
    gap: clamp(0.3rem, 1.2dvh, 0.8rem);
    max-width: 1400px;
    margin: 0 auto;
    padding: max(0.5rem, env(safe-area-inset-top)) max(0.5rem, env(safe-area-inset-right))
             0.6rem max(0.5rem, env(safe-area-inset-left));
}

.hd { grid-area: head; text-align: center; min-width: 0; }
.hd h1 {
    font-size: clamp(1.1rem, 4vw, 1.9rem);
    font-weight: 900; letter-spacing: -0.02em;
    display: inline-flex; align-items: center; justify-content: center; gap: 0.35rem;
}
.hd h1 .emoji { -webkit-text-fill-color: initial; filter: drop-shadow(0 0 8px rgba(124, 179, 66, 0.35)); }
.hd h1 .title {
    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; }

.meta {
    display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
    gap: 0.45rem; margin-top: 0.35rem;
    font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
}
.chip, .icobtn, .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.3rem;
    border: 1px solid var(--gold-border); border-radius: 9999px;
    color: var(--text-primary); font-weight: 600;
    transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
    touch-action: manipulation;
}
.chip { padding: 0.25rem 0.75rem; background: rgba(15, 23, 42, 0.8); }
.chip b { color: var(--primary); font-variant-numeric: tabular-nums; min-width: 1ch; text-align: right; }
.chip.bump { animation: bump 0.3s ease-out; }
@keyframes bump { 0% { transform: scale(1); } 45% { transform: scale(1.16); } 100% { transform: scale(1); } }
.icobtn { min-width: 44px; min-height: 36px; padding: 0.25rem 0.6rem; background: rgba(15, 23, 42, 0.8); font-size: 0.95rem; }
.icobtn:hover, .btn:hover { border-color: var(--primary); transform: translateY(-1px); }
.icobtn:focus-visible, .btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

/* ---------- hrací plocha (canvas) ---------- */
.board-zone {
    grid-area: board;
    display: grid; place-items: center;
    min-width: 0; min-height: 0;
    padding: 2px;
}
.board-wrap {
    position: relative;
    box-sizing: border-box;
    padding: clamp(5px, 1.4vmin, 12px);
    border-radius: var(--radius-lg);
    background: linear-gradient(150deg, rgba(15, 23, 42, 0.92), rgba(2, 6, 23, 0.92));
    outline: 3px solid var(--primary-dark); outline-offset: -3px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55), 0 0 60px rgba(212, 175, 55, 0.08),
                inset 0 0 0 1px rgba(212, 175, 55, 0.18);
    max-width: 100%; max-height: 100%;
    touch-action: none;
    -webkit-user-select: none; user-select: none;
}
canvas {
    display: block;
    border-radius: var(--radius-md);
    background: #0A0F1D;
    touch-action: none; -webkit-touch-callout: none;
}

/* overlay odznaky nad deskou */
.overlay {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    display: none; z-index: 5; text-align: center;
    padding: clamp(0.7rem, 2.2vh, 1.2rem) clamp(1.2rem, 4vw, 2.2rem);
    border-radius: var(--radius-xl);
    font-weight: 800; letter-spacing: 0.02em;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(6px);
}
.overlay.show { display: block; }
.overlay-pause {
    background: linear-gradient(135deg, var(--warning), #FFA500);
    color: var(--surface-dark); border: 1px solid var(--warning);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
}
.overlay.show.overlay-pause { animation: pausePulse 1.4s ease-in-out infinite; }
@keyframes pausePulse { 0%, 100% { transform: translate(-50%, -50%) scale(1); } 50% { transform: translate(-50%, -50%) scale(1.05); } }

/* startovní/swipe nápověda dole nad deskou */
.hint-badge {
    position: absolute; left: 50%; bottom: clamp(8px, 2.5%, 18px); transform: translateX(-50%);
    z-index: 4; display: none;
    padding: 0.4rem 0.9rem; border-radius: 9999px;
    background: rgba(2, 6, 23, 0.78); border: 1px solid var(--gold-border);
    color: var(--text-secondary); font-size: clamp(0.7rem, 1.8vw, 0.85rem); font-weight: 600;
    white-space: nowrap; pointer-events: none;
}
.hint-badge.show { display: block; animation: hintPulse 2.4s ease-in-out infinite; }
@keyframes hintPulse { 0%, 100% { opacity: 0.7; } 50% { opacity: 1; } }

/* ---------- tlačítka / dialogy ---------- */
.btn { min-height: 44px; min-width: 44px; padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), rgba(212, 175, 55, 0.05)); font-size: 0.85rem; }
.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; }

dialog.dlg {
    margin: auto; max-width: min(92vw, 27rem); 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 0.5rem;
    border: 1px solid var(--gold-border); border-radius: var(--radius-lg);
    background: rgba(30, 41, 59, 0.6);
    font-size: 0.85rem; 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-hint { font-size: 0.72rem; color: var(--text-muted); margin-top: -0.4rem; margin-bottom: 0.9rem; text-align: center; line-height: 1.4; }
.dlg-actions { display: flex; gap: 0.5rem; justify-content: center; margin-top: 1.1rem; flex-wrap: wrap; }
.dlg-actions .btn { flex: 1 1 auto; }

/* nastavení (řádky s přepínači) */
.setrow {
    display: flex; align-items: center; justify-content: space-between; gap: 0.7rem;
    padding: 0.6rem 0; border-bottom: 1px solid rgba(212, 175, 55, 0.12);
    font-size: 0.9rem; font-weight: 600; cursor: pointer;
}
.setrow:last-of-type { border-bottom: 0; }
.setrow input[type="checkbox"] { width: 2.6rem; height: 1.4rem; accent-color: var(--primary); cursor: pointer; flex: none; }
.setrow select {
    font: inherit; color: var(--text-primary); background: rgba(30, 41, 59, 0.9);
    border: 1px solid var(--gold-border); border-radius: var(--radius-sm); padding: 0.3rem 0.5rem;
}

/* výsledek hry */
.result-emoji { display: block; text-align: center; font-size: 2.6rem; margin-bottom: 0.3rem; }
.winstats { margin: 0.6rem 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0.45rem; }
.winstats div {
    padding: 0.55rem 0.6rem; text-align: center;
    border: 1px solid var(--gold-border); border-radius: var(--radius-lg);
    background: rgba(30, 41, 59, 0.5); font-size: 0.82rem; color: var(--text-secondary);
}
.winstats b { display: block; font-size: 1.15rem; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.record { text-align: center; color: var(--primary); font-weight: 800; margin-top: 0.7rem; }
.record[hidden] { display: none; }

/* ---------- 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 .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); }
.content kbd {
    padding: 0.1rem 0.45rem; background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--gold-border); border-bottom-width: 2px; border-radius: var(--radius-sm);
    font-family: inherit; font-size: 0.85em; font-weight: 700; 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 ---------- */
/* mobil landscape: deska vlevo, hlavička jako boční sloupec (bez scrollu) */
@media (max-height: 500px) and (orientation: landscape) {
    .app {
        grid-template-areas: "board head";
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-rows: minmax(0, 1fr);
        column-gap: 0.8rem;
    }
    .hd { align-self: center; max-width: 40vw; }
    .hd h1 { font-size: 1rem; }
    .hd .h1-sub { display: none; }
    .meta { flex-direction: column; align-items: stretch; }
}

/* tablet/desktop */
@media (min-width: 768px) {
    :root { --board-cap: 700px; }
    .hd h1 { margin-bottom: 0.1rem; }
    .meta { font-size: 0.95rem; gap: 0.6rem; }
    .icobtn { min-height: 40px; font-size: 1.05rem; }
}

/* 4K / velmi široké */
@media (min-width: 2560px) {
    :root { --board-cap: 860px; }
    .content { max-width: 1100px; font-size: 1.12rem; }
    .meta { 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;
    }
}