html {
    background: #0a0e1a;
}
html.light-theme-preload {
    background: #f0f2f7;
}

:root {
    --bg: #0a0e1a;
    --card-bg: rgba(255, 255, 255, 0.035);
    --card-border: rgba(255, 255, 255, 0.07);
    --card-hover-border: rgba(139, 92, 246, 0.45);
    --text: #e5e7eb;
    --text-dim: #8b95a7;
    --accent-1: #a78bfa;
    --accent-2: #22d3ee;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    background: var(--bg);
    background-image:
        radial-gradient(ellipse 70% 55% at 15% 0%,  rgba(139, 92, 246, 0.18), transparent 65%),
        radial-gradient(ellipse 60% 50% at 85% 100%, rgba(34, 211, 238, 0.14), transparent 65%),
        radial-gradient(ellipse 50% 40% at 50% 50%,  rgba(236, 72, 153, 0.06), transparent 70%);
    background-attachment: fixed;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, 'Nunito', sans-serif;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    padding: 48px 20px;
    overflow-x: hidden;
}
.container { max-width: 640px; margin: 0 auto; }
.header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 32px; gap: 16px;
}
.title {
    font-size: 26px; font-weight: 800; letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.subtitle { margin-top: 4px; font-size: 13px; color: var(--text-dim); }
.live {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 11px; font-weight: 700; color: var(--text-dim);
    letter-spacing: 0.14em; text-transform: uppercase;
    padding: 7px 12px; border: 1px solid var(--card-border);
    border-radius: 999px; background: rgba(255,255,255,0.02);
}
.live-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: #10b981; box-shadow: 0 0 10px #10b981;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%,100% { opacity: 1;   box-shadow: 0 0 10px #10b981; }
    50%     { opacity: 0.4; box-shadow: 0 0 20px #10b981; }
}
.big-card {
    display: block; position: relative; text-decoration: none; color: inherit;
    background: var(--card-bg); border: 1px solid var(--card-border);
    border-radius: 24px; padding: 26px 24px;
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 30px 60px -30px rgba(139, 92, 246, 0.4);
    transition: all .3s cubic-bezier(.4,0,.2,1);
    overflow: hidden; animation: fadeInUp .55s ease-out; cursor: pointer;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}
.big-card:hover {
    background: rgba(255,255,255,0.055);
    border-color: var(--card-hover-border);
    transform: translateY(-4px);
    box-shadow: 0 40px 80px -30px rgba(139, 92, 246, 0.55);
}
.big-card:hover .big-card-arrow {
    opacity: 1; transform: translateX(6px); color: var(--accent-1);
}
.big-card-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.big-card-icon {
    width: 56px; height: 56px; flex: none;
    display: flex; align-items: center; justify-content: center;
    border-radius: 16px; font-size: 28px;
    background: linear-gradient(135deg, rgba(167,139,250,0.18), rgba(34,211,238,0.12));
    border: 1px solid rgba(167,139,250,0.3);
    box-shadow: 0 0 30px -8px rgba(167,139,250,0.5);
}
.big-card-title { font-size: 22px; font-weight: 800; color: var(--text); }
.big-card-sub { margin-top: 4px; font-size: 13px; color: var(--text-dim); }
.big-card-arrow {
    margin-left: auto; font-size: 24px; color: var(--text-dim);
    opacity: 0.4; transition: all .3s;
}
.sensor-row {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 16px; border-radius: 14px;
    background: rgba(255,255,255,0.025);
    border: 1px solid rgba(255,255,255,0.05);
    transition: all .3s;
}
.sensor-row + .sensor-row { margin-top: 10px; }
.big-card:hover .sensor-row {
    background: rgba(255,255,255,0.045);
    border-color: rgba(255,255,255,0.09);
}
.sensor-icon {
    width: 36px; height: 36px; flex: none;
    display: flex; align-items: center; justify-content: center;
    border-radius: 10px; font-size: 17px; line-height: 1;
}
.sensor-name {
    font-size: 13px; font-weight: 700; color: var(--text-dim);
    letter-spacing: 0.06em; text-transform: uppercase;
}
.sensor-temp {
    margin-left: auto;
    font-family: 'SF Mono', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
    font-variant-numeric: tabular-nums;
    font-size: 26px; font-weight: 600; letter-spacing: -0.03em;
    transition: color .5s;
}
.sensor-temp-unit {
    font-size: 14px; font-weight: 500; color: var(--text-dim); margin-left: 2px;
}
.footer {
    margin-top: 36px; text-align: center;
    font-size: 12px; color: var(--text-dim); letter-spacing: 0.04em;
}
.back {
    width: 40px; height: 40px; flex: none;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-dim); border: 1px solid var(--card-border);
    background: rgba(255,255,255,0.025); border-radius: 12px;
    text-decoration: none; font-size: 18px; transition: all .25s;
}
.back:hover { color: #fff; border-color: var(--card-hover-border); transform: translateX(-2px); }

/* ===== Страницы с графиками ===== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}
.stat-link {
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
    transition: opacity .25s, transform .25s;
}
.stat-link:not(.active) {
    opacity: 0.45;
}
.stat-link:not(.active):hover {
    opacity: 0.8;
    transform: translateY(-2px);
}
.stat-link.active .stat {
    border-color: var(--item-color) !important;
    background: rgba(255,255,255,0.06);
    box-shadow: 0 0 22px -8px var(--item-color);
}
.stat-link:hover .stat {
    transform: translateY(-2px);
    border-color: var(--card-hover-border);
}
.stat {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 14px 16px;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: all .25s;
    height: 100%;
}
.stat-label {
    display: flex; align-items: center; gap: 8px;
    font-size: 11px; font-weight: 600;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 8px;
}
.stat-label .dot {
    width: 9px; height: 9px; border-radius: 50%;
    box-shadow: 0 0 8px currentColor;
}
.stat-value {
    font-family: 'SF Mono', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
    font-variant-numeric: tabular-nums;
    font-size: 26px; font-weight: 600;
    letter-spacing: -0.02em; line-height: 1;
    transition: color .5s;
}
.stat-minmax {
    margin-top: 6px;
    font-size: 11px;
    color: var(--text-dim);
    font-family: 'SF Mono', ui-monospace, monospace;
    font-variant-numeric: tabular-nums;
}
.stat-minmax .lo { color: #38bdf8; }
.stat-minmax .hi { color: #fbbf24; }

.chart-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 14px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 24px 60px -30px rgba(139, 92, 246, 0.35);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.chart-container {
    position: relative;
    height: 380px;
    min-height: 0;
}
.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}
.chart-card.fullscreen {
    position: fixed;
    inset: 16px;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    box-shadow: 0 40px 100px -20px rgba(0,0,0,0.9);
    padding: 22px 22px 18px;
    border-radius: 20px;
}
.chart-card.fullscreen .chart-container { flex: 1; height: auto; }

/* ═══════════════════════════════════════════════════════════
   КНОПКА РАЗВЕРНУТЬ / СВЕРНУТЬ ⛶  (ПРАВЫЙ ВЕРХНИЙ УГОЛ)
   ═══════════════════════════════════════════════════════════ */
.fs-btn {
    position: absolute;
    top: 12px;                 /* ⬅️ МЕНЯЙ ЗДЕСЬ: вверх/вниз (больше = ниже) */
    right: 22px;               /* ⬅️ МЕНЯЙ ЗДЕСЬ: от правого края (больше = левее) */
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--card-border);
    border-radius: 9px;
    color: var(--text-dim);
    cursor: pointer;
    z-index: 6;
    transition: all .22s;
}
.fs-btn:hover {
    color: var(--text);
    background: rgba(255,255,255,0.09);
    border-color: var(--card-hover-border);
}
.fs-btn svg { width: 16px; height: 16px; }
.fs-btn .icon-compress { display: none; }
.chart-card.fullscreen .fs-btn .icon-expand { display: none; }
.chart-card.fullscreen .fs-btn .icon-compress { display: block; }

/* ===== Периоды (таблетки под графиком) ===== */
.periods {
    display: flex; justify-content: center; gap: 6px;
    padding: 5px;
    background: rgba(255,255,255,0.025);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    width: fit-content;
    margin-left: auto; margin-right: auto;
}
.periods button {
    background: transparent; border: none;
    color: var(--text-dim);
    padding: 9px 18px; border-radius: 8px;
    font-family: inherit; font-size: 13px; font-weight: 600;
    cursor: pointer; transition: all .22s;
}
.periods button:hover { color: var(--text); }
.periods button.active {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #0a0e1a;
    box-shadow: 0 8px 20px -8px rgba(139,92,246,0.6);
}

/* ═══════════════════════════════════════════════════════════
   КНОПКИ ЗУМА  [←][＋][−][→][⟲]   (СЛЕВА ОТ ⛶)
   ═══════════════════════════════════════════════════════════ */
.zoom-controls {
    position: absolute;
    top: 12px;                 /* ⬅️ МЕНЯЙ ЗДЕСЬ: вверх/вниз (должно совпадать с .fs-btn top) */
    right: 66px;               /* ⬅️ МЕНЯЙ ЗДЕСЬ: чем больше — тем ЛЕВЕЕ от правого края.
                                  22 (отступ ⛶) + 34 (ширина ⛶) + 10 (зазор) = 66 */
    left: auto;
    transform: none;
    bottom: auto;
    display: flex;
    justify-content: center;
    gap: 4px;
    padding: 4px;
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    z-index: 5;
    opacity: 1;
    transition: opacity .25s, background .22s, border-color .22s;
}
.zoom-controls:hover {
    background: rgba(255,255,255,0.09);
    border-color: var(--card-hover-border);
}
.zoom-controls button {
    width: 30px;
    height: 30px;
    border-radius: 7px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all .22s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
}
.zoom-controls button:hover {
    background: rgba(255,255,255,0.09);
    color: var(--text);
}
.zoom-controls button:active {
    transform: scale(0.95);
}

/* ===== Кнопки-таблетки в развёрнутом режиме ===== */
.fullscreen-switcher {
    display: none;
}
.chart-card.fullscreen .fullscreen-switcher {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 10px 0 4px;
}
.fs-switch-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 10px;
    border: 2px solid transparent;
    background: rgba(255,255,255,0.03);
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    color: #cbd5e1;
    transition: all .25s;
    user-select: none;
}
.fs-switch-btn:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-1px);
}
.fs-switch-btn.active {
    background: rgba(255,255,255,0.09);
    border-color: var(--c);
    color: #fff;
    box-shadow: 0 0 18px -6px var(--c);
}
.fs-switch-btn .legend-swatch {
    width: 14px;
    height: 3px;
    border-radius: 2px;
    background: var(--c);
    box-shadow: 0 0 8px var(--c);
    flex: none;
}

/* ===========================================================
   📱 МОБИЛЬНАЯ АДАПТАЦИЯ  (max-width: 520px)
   =========================================================== */
@media (max-width: 520px) {
    body { padding: 20px 12px; }
    .container { padding: 0 4px; }
    .chart-container { height: 280px; }

    .periods {
        width: 100%;
        flex-wrap: wrap;
        justify-content: center;
        gap: 4px;
    }
    .periods button {
        padding: 6px 10px;
        font-size: 11px;
        border-radius: 6px;
    }

    .stat { padding: 10px 12px; }
    .stat-value { font-size: 20px; }
    .stat-label { font-size: 10px; }
    .stat-minmax { font-size: 10px; }

    .title { font-size: 20px; }
    .subtitle { font-size: 11px; }

    .big-card { padding: 18px 16px; border-radius: 18px; }
    .big-card-title { font-size: 17px; }
    .big-card-sub { font-size: 11px; }
    .big-card-icon { width: 44px; height: 44px; font-size: 22px; border-radius: 12px; }

    .sensor-row { padding: 10px 12px; gap: 10px; border-radius: 10px; }
    .sensor-name { font-size: 11px; }
    .sensor-temp { font-size: 20px; }
    .sensor-temp-unit { font-size: 12px; }
    .sensor-icon { width: 30px; height: 30px; font-size: 15px; border-radius: 8px; }

    .footer { margin-top: 22px; font-size: 11px; }

    /* ⛶ — мобильный, ОБЫЧНЫЙ режим (не развёрнутый) */
    .fs-btn {
        width: 30px; height: 30px; border-radius: 7px;
        top: 6px;              /* ⬅️ МЕНЯЙ ЗДЕСЬ: вверх/вниз */
        right: 16px;            /* ⬅️ МЕНЯЙ ЗДЕСЬ: от правого края */
    }
    .fs-btn svg { width: 14px; height: 14px; }

    .back { width: 34px; height: 34px; font-size: 16px; border-radius: 10px; }

    /* Кнопки зума — мобильный, ОБЫЧНЫЙ режим */
    .zoom-controls {
        gap: 3px;
        padding: 3px;
        top: 6px;              /* ⬅️ МЕНЯЙ ЗДЕСЬ: должно совпадать с .fs-btn top */
        right: 80px;            /* ⬅️ МЕНЯЙ ЗДЕСЬ: больше = ЛЕВЕЕ */
        opacity: 1;
    }
    .zoom-controls button {
        width: 28px;
        height: 28px;
        font-size: 13px;
        border-radius: 6px;
    }

    /* ═══════════════════════════════════════════════════════
       🔽 РАЗВЁРНУТЫЙ РЕЖИМ на телефоне
       Кнопки опущены НИЖЕ таблеток, чтобы не перекрывались.
       ═══════════════════════════════════════════════════════ */

    .chart-card.fullscreen .zoom-controls {
        top: 112px;             /* ⬅️👈 МЕНЯЙ ЗДЕСЬ: чем БОЛЬШЕ = НИЖЕ.
                                  Если таблетки в 1 строку — хватит 60–70.
                                  Если в 2 строки — 100–130. */
        right: 60px;            /* ⬅️ МЕНЯЙ ЗДЕСЬ: больше = ЛЕВЕЕ */
    }
    .chart-card.fullscreen .fs-btn {
        top: 112px;             /* ⬅️👈 МЕНЯЙ ЗДЕСЬ: должно совпадать с зумом выше */
        right: 8px;            /* ⬅️ МЕНЯЙ ЗДЕСЬ: от правого края */
    }

    .chart-card.fullscreen .fullscreen-switcher {
        gap: 6px;
        padding: 8px 0 2px;
    }
    .fs-switch-btn {
        font-size: 11px;
        padding: 5px 10px;
        gap: 5px;
    }
    .fs-switch-btn .legend-swatch {
        width: 10px;
        height: 3px;
    }
}

/* ===== Нижняя панель: выбор периода + скачать ===== */
.bottom-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding-top: 8px;
    position: relative;
}

.period-select {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 22px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #0a0e1a;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
    font-family: inherit;
    transition: all .22s;
    min-width: 150px;
    justify-content: space-between;
}
.period-select:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px -8px rgba(139,92,246,0.6);
}
.period-select .arrow {
    font-size: 10px;
    transition: transform .25s;
}
.period-select.open .arrow {
    transform: rotate(180deg);
}

.period-menu {
    display: none;
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: #1a1a2e;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 6px;
    min-width: 180px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    z-index: 100;
}
.period-menu.open {
    display: block;
}
.period-menu div {
    padding: 10px 16px;
    border-radius: 8px;
    color: #cbd5e1;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all .18s;
    text-align: left;
}
.period-menu div:hover {
    background: rgba(167,139,250,0.15);
    color: #fff;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    background: rgba(255,255,255,0.04);
    color: #e5e7eb;
    font-size: 18px;
    cursor: pointer;
    transition: all .22s;
    font-family: inherit;
}
.download-btn:hover {
    background: rgba(167,139,250,0.15);
    border-color: var(--accent-1);
    transform: translateY(-1px);
}

/* Мобильная версия нижней панели */
@media (max-width: 520px) {
    .bottom-bar {
        gap: 8px;
    }
    .period-select {
        font-size: 13px;
        padding: 9px 16px;
        min-width: 130px;
    }
    .period-menu {
        min-width: 160px;
    }
    .period-menu div {
        padding: 9px 14px;
        font-size: 13px;
    }
    .download-btn {
        width: 42px;
        height: 42px;
        font-size: 17px;
    }
}

/* =========================================================
   ===== СВЕТЛАЯ ТЕМА (единые правила) =====================
   ========================================================= */

body.light-theme,
html.light-theme-preload body {
    --bg: #f0f2f7;
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: rgba(0, 0, 0, 0.08);
    --card-hover-border: rgba(139, 92, 246, 0.5);
    --text: #1a1a2e;
    --text-dim: #6b7280;
    --accent-1: #7c3aed;
    --accent-2: #0891b2;

    background: #f0f2f7;
    background-image:
        radial-gradient(ellipse 70% 55% at 15% 0%,  rgba(139, 92, 246, 0.12), transparent 65%),
        radial-gradient(ellipse 60% 50% at 85% 100%, rgba(34, 211, 238, 0.10), transparent 65%),
        radial-gradient(ellipse 50% 40% at 50% 50%,  rgba(236, 72, 153, 0.05), transparent 70%);
    color: var(--text);
}

body.light-theme .stat,
body.light-theme .big-card,
body.light-theme .chart-card,
html.light-theme-preload body .stat,
html.light-theme-preload body .big-card,
html.light-theme-preload body .chart-card {
    background: var(--card-bg);
    border-color: var(--card-border);
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

body.light-theme .big-card:hover,
html.light-theme-preload body .big-card:hover {
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.15);
    background: rgba(255, 255, 255, 0.95);
}

body.light-theme .sensor-row,
html.light-theme-preload body .sensor-row {
    background: rgba(0, 0, 0, 0.025);
    border-color: rgba(0, 0, 0, 0.06);
}

body.light-theme .sensor-row:hover,
html.light-theme-preload body .sensor-row:hover {
    background: rgba(0, 0, 0, 0.05);
}

body.light-theme .live,
html.light-theme-preload body .live {
    background: rgba(0, 0, 0, 0.04);
    color: #4b5563;
}

body.light-theme .back,
html.light-theme-preload body .back {
    background: rgba(0, 0, 0, 0.04);
    color: #4b5563;
}

body.light-theme .footer,
html.light-theme-preload body .footer {
    color: #6b7280;
}

body.light-theme .subtitle,
html.light-theme-preload body .subtitle {
    color: #6b7280;
}

body.light-theme .big-card-sub,
html.light-theme-preload body .big-card-sub {
    color: #6b7280;
}

body.light-theme .big-card-title,
html.light-theme-preload body .big-card-title {
    color: #1a1a2e;
}

body.light-theme .sensor-name,
html.light-theme-preload body .sensor-name {
    color: #6b7280;
}

body.light-theme .periods,
html.light-theme-preload body .periods {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
}

body.light-theme .periods button,
html.light-theme-preload body .periods button {
    color: #4b5563;
}

body.light-theme .download-btn,
html.light-theme-preload body .download-btn {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
    color: #4b5563;
}

body.light-theme .fs-btn,
html.light-theme-preload body .fs-btn {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
    color: #4b5563;
}

body.light-theme .period-menu,
html.light-theme-preload body .period-menu {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

body.light-theme .period-menu div,
html.light-theme-preload body .period-menu div {
    color: #4b5563;
}

body.light-theme .period-menu div:hover,
html.light-theme-preload body .period-menu div:hover {
    background: rgba(124, 58, 237, 0.1);
    color: #1a1a2e;
}

body.light-theme .fs-switch-btn,
html.light-theme-preload body .fs-switch-btn {
    background: rgba(0, 0, 0, 0.03);
    color: #4b5563;
}

body.light-theme .stat-minmax,
html.light-theme-preload body .stat-minmax {
    color: #6b7280;
}

body.light-theme .stat-label,
html.light-theme-preload body .stat-label {
    color: #6b7280;
}

body.light-theme .chart-card.fullscreen,
html.light-theme-preload body .chart-card.fullscreen {
    background: rgba(240, 242, 247, 0.98);
}

/* Кнопки зума в светлой теме — как .fs-btn */
body.light-theme .zoom-controls,
html.light-theme-preload body .zoom-controls {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
}
body.light-theme .zoom-controls button,
html.light-theme-preload body .zoom-controls button {
    color: #4b5563;
}
body.light-theme .zoom-controls button:hover,
html.light-theme-preload body .zoom-controls button:hover {
    background: rgba(0, 0, 0, 0.06);
    color: #1a1a2e;
}

/* Карточка переключения темы — стрелка при наведении */
#themeCard:hover .big-card-arrow {
    opacity: 1;
    transform: translateX(6px);
    color: var(--accent-1);
}