/*
 * Shared styles for all pages: colour themes (light/dark), the theme and
 * language controls, and exhibition ("kiosk") mode.
 */

/* --- COLOUR THEMES --------------------------------------------------- */
:root {
    color-scheme: light;
    --page-bg: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --surface: #ffffff;
    --surface-2: #f7f9fb;
    --chip: #eef2f7;
    --text: #333333;
    --text-2: #4a5560;
    --muted: #5f6b76;
    --heading: #2c3e50;
    --border: #e3e8ee;
    --accent: #2a5298;
    --accent-strong: #1e3c72;
    --crit-bg: #fdf2f2;
    --crit-text: #c0392b;
    --safe-bg: #e3f2fd;
    --safe-text: #1565c0;
    --good-bg: #e8f8ef;
    --good-text: #1e7e45;
    --bad-bg: #fdecea;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* Dark theme: follows the device setting unless the visitor picked a theme */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --page-bg: linear-gradient(135deg, #0b1220 0%, #1a2436 100%);
        --surface: #182131;
        --surface-2: #1f2a3d;
        --chip: #2a3650;
        --text: #e6eaf0;
        --text-2: #c9d1dc;
        --muted: #a3afbf;
        --heading: #f1f5f9;
        --border: #33415a;
        --accent: #9cbcff;
        --accent-strong: #b4ccff;
        --crit-bg: #3a2228;
        --crit-text: #ff9a8f;
        --safe-bg: #172e4a;
        --safe-text: #9fd0ff;
        --good-bg: #16362a;
        --good-text: #7ee2a8;
        --bad-bg: #3a2228;
        --shadow: rgba(0, 0, 0, 0.45);
    }
}
:root[data-theme="dark"] {
    color-scheme: dark;
    --page-bg: linear-gradient(135deg, #0b1220 0%, #1a2436 100%);
    --surface: #182131;
    --surface-2: #1f2a3d;
    --chip: #2a3650;
    --text: #e6eaf0;
    --text-2: #c9d1dc;
    --muted: #a3afbf;
    --heading: #f1f5f9;
    --border: #33415a;
    --accent: #9cbcff;
    --accent-strong: #b4ccff;
    --crit-bg: #3a2228;
    --crit-text: #ff9a8f;
    --safe-bg: #172e4a;
    --safe-text: #9fd0ff;
    --good-bg: #16362a;
    --good-text: #7ee2a8;
    --bad-bg: #3a2228;
    --shadow: rgba(0, 0, 0, 0.45);
}

/* Always print in light colours */
@media print {
    :root:root:root {
        color-scheme: light;
        --page-bg: #ffffff;
        --surface: #ffffff;
        --surface-2: #f7f9fb;
        --chip: #eef2f7;
        --text: #333333;
        --text-2: #4a5560;
        --muted: #5f6b76;
        --heading: #2c3e50;
        --border: #d5dce4;
        --accent: #2a5298;
        --accent-strong: #1e3c72;
        --crit-bg: #fdf2f2;
        --crit-text: #c0392b;
        --safe-bg: #e3f2fd;
        --safe-text: #1565c0;
        --good-bg: #e8f8ef;
        --good-text: #1e7e45;
        --bad-bg: #fdecea;
    }
}

/* --- HEADER CONTROLS (theme + language) ------------------------------ */
.site-controls {
    position: absolute;
    top: 14px;
    right: 14px;
    display: flex;
    gap: 8px;
    align-items: center;
    z-index: 5;
}
.theme-toggle,
.lang-select {
    font: inherit;
    font-size: 0.9em;
    color: white;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    cursor: pointer;
}
.theme-toggle { width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; font-size: 1.1em; }
.lang-select { height: 38px; padding: 0 10px; }
.lang-select option { color: #333; }
.theme-toggle:hover, .lang-select:hover { background: rgba(255, 255, 255, 0.25); }
.theme-toggle:focus-visible, .lang-select:focus-visible { outline: 3px solid #ffd76a; outline-offset: 2px; }

/* --- EXHIBITION (KIOSK) MODE ------------------------------------------ */
.kiosk .hide-in-kiosk { display: none !important; }
.kiosk a[href^="http"] { cursor: default; text-decoration: none; color: inherit; }

/* a modal <dialog>, so it also appears above the periodic table and game pop-ups */
.kiosk-overlay {
    width: 100%; height: 100%; max-width: none; max-height: none;
    margin: 0; border: none;
    background: transparent;
    padding: 16px;
}
.kiosk-overlay[open] { display: flex; align-items: center; justify-content: center; }
.kiosk-overlay::backdrop { background: rgba(11, 18, 32, 0.75); }
.kiosk-overlay .box {
    background: var(--surface);
    color: var(--text);
    border-radius: 16px;
    padding: 30px 35px;
    max-width: 420px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}
.kiosk-overlay .count { display: block; font-size: 3em; font-weight: 800; color: var(--accent-strong); margin: 10px 0; }

@media print {
    .site-controls, .kiosk-overlay { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}