/* ══════════════════════════════════════════════════
   CSS VARIABLES — DARK THEME (DEFAULT)
══════════════════════════════════════════════════ */
:root {
    --bg-radial-1: #1e293b;
    --bg-radial-2: #020617;
    --body-color: #cbd5e1;
    --chassis-bg-1: #0f172a;
    --chassis-bg-2: #020617;
    --chassis-shadow: rgba(37, 99, 235, 0.1);
    --cell-bg: #060913;
    --cell-shadow-inset-1: rgba(0, 0, 0, 0.9);
    --cell-shadow-inset-2: rgba(255, 255, 255, 0.04);
    --cell-border-glow: rgba(55, 120, 255, 0.18);
    --arm-long-1: #ffffff;
    --arm-long-2: #94a3b8;
    --arm-short-1: #fcd34d;
    --arm-short-2: #b45309;
    --pivot-1: #94a3b8;
    --pivot-2: #0f172a;
    --tabs-bg: rgba(15, 23, 42, 0.6);
    --tabs-border: rgba(255, 255, 255, 0.05);
    --tab-color: #64748b;
    --tab-active-bg: #1e293b;
    --tab-active-color: #f8fafc;
    --panel-btn-bg: rgba(15, 23, 42, 0.6);
    --panel-btn-color: #cbd5e1;
    --panel-btn-border: rgba(255, 255, 255, 0.1);
    --panel-btn-hover-bg: rgba(30, 41, 59, 0.8);
    --panel-btn-hover-color: #f8fafc;
    --accent-color: #60a5fa;
    --accent-border: rgba(96, 165, 250, 0.3);
    --footer-color: #94a3b8;
    --footer-link-color: #f8fafc;
    --gh-btn-bg: rgba(15, 23, 42, 0.6);
    --gh-btn-border: rgba(255, 255, 255, 0.1);
    --gh-btn-color: #cbd5e1;
    --gh-btn-hover-bg: #1e293b;
    --gh-cnt-bg: rgba(255, 255, 255, 0.1);
    --fab-bg: rgba(15, 23, 42, 0.75);
    --fab-border: rgba(255, 255, 255, 0.1);
    --fab-color: #94a3b8;
    --fab-hover-bg: rgba(30, 41, 59, 0.95);
    --fab-hover-color: #f8fafc;
    --digital-color: #e2e8f0;
    --digital-seconds-color: #60a5fa;
    --digital-bg: rgba(15, 23, 42, 0.55);
    --digital-border: rgba(255, 255, 255, 0.07);
    --lap-bg: rgba(10, 18, 35, 0.7);
    --lap-border: rgba(255, 255, 255, 0.06);
    --lap-item-border: rgba(255, 255, 255, 0.04);
    --lap-num-color: #60a5fa;
    --lap-time-color: #f1f5f9;
    --lap-best-color: #4ade80;
    --lap-worst-color: #f87171;
    --lap-scrollbar-track: rgba(6, 9, 19, 0.8);
    --toast-bg: rgba(30, 41, 59, 0.95);
    --toast-color: #f8fafc;
    --toast-border: rgba(255, 255, 255, 0.1);
}

/* ══════════════════════════════════════════════════
   CSS VARIABLES — LIGHT THEME
══════════════════════════════════════════════════ */
[data-theme="light"] {
    --bg-radial-1: #e2e8f0;
    --bg-radial-2: #f0f4f8;
    --body-color: #1e293b;
    --chassis-bg-1: #dde3ed;
    --chassis-bg-2: #c4cedd;
    --chassis-shadow: rgba(37, 99, 235, 0.08);
    --cell-bg: #b8c4d4;
    --cell-shadow-inset-1: rgba(0, 0, 0, 0.15);
    --cell-shadow-inset-2: rgba(255, 255, 255, 0.5);
    --cell-border-glow: rgba(55, 120, 255, 0.10);
    --arm-long-1: #1e293b;
    --arm-long-2: #475569;
    --arm-short-1: #d97706;
    --arm-short-2: #92400e;
    --pivot-1: #475569;
    --pivot-2: #e2e8f0;
    --tabs-bg: rgba(200, 210, 225, 0.7);
    --tabs-border: rgba(0, 0, 0, 0.08);
    --tab-color: #64748b;
    --tab-active-bg: #f8fafc;
    --tab-active-color: #1e293b;
    --panel-btn-bg: rgba(220, 228, 240, 0.8);
    --panel-btn-color: #1e293b;
    --panel-btn-border: rgba(0, 0, 0, 0.12);
    --panel-btn-hover-bg: rgba(240, 245, 255, 0.95);
    --panel-btn-hover-color: #0f172a;
    --accent-color: #2563eb;
    --accent-border: rgba(37, 99, 235, 0.4);
    --footer-color: #475569;
    --footer-link-color: #1e293b;
    --gh-btn-bg: rgba(220, 228, 240, 0.8);
    --gh-btn-border: rgba(0, 0, 0, 0.1);
    --gh-btn-color: #1e293b;
    --gh-btn-hover-bg: #f8fafc;
    --gh-cnt-bg: rgba(0, 0, 0, 0.08);
    --fab-bg: rgba(220, 228, 240, 0.85);
    --fab-border: rgba(0, 0, 0, 0.1);
    --fab-color: #475569;
    --fab-hover-bg: rgba(248, 250, 252, 0.98);
    --fab-hover-color: #1e293b;
    --digital-color: #1e293b;
    --digital-seconds-color: #2563eb;
    --digital-bg: rgba(220, 228, 240, 0.65);
    --digital-border: rgba(0, 0, 0, 0.08);
    --lap-bg: rgba(210, 220, 235, 0.75);
    --lap-border: rgba(0, 0, 0, 0.08);
    --lap-item-border: rgba(0, 0, 0, 0.05);
    --lap-num-color: #2563eb;
    --lap-time-color: #1e293b;
    --lap-best-color: #16a34a;
    --lap-worst-color: #dc2626;
    --lap-scrollbar-track: rgba(180, 195, 218, 0.6);
    --toast-bg: rgba(240, 245, 252, 0.97);
    --toast-color: #1e293b;
    --toast-border: rgba(0, 0, 0, 0.1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: radial-gradient(circle at 50% 30%, var(--bg-radial-1) 0%, var(--bg-radial-2) 100%);
    color: var(--body-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    gap: 1.8rem;
    overflow: hidden;
    perspective: 1500px;
    transition: background 0.4s ease, color 0.4s ease;
}

/* ══════════════════════════════════════════════════
   FLOATING CONTROLS (TOP RIGHT)
══════════════════════════════════════════════════ */
.floating-controls {
    position: fixed;
    top: 1.2rem;
    right: 1.2rem;
    display: flex;
    gap: 0.6rem;
    z-index: 1000;
}


/* ══════════════════════════════════════════════════
   TOAST
══════════════════════════════════════════════════ */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--toast-bg);
    color: var(--toast-color);
    border: 1px solid var(--toast-border);
    padding: 0.6rem 1.4rem;
    border-radius: 12px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    backdrop-filter: blur(16px);
    z-index: 2000;
    opacity: 0;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ══════════════════════════════════════════════════
   CLOCK WRAPPER
══════════════════════════════════════════════════ */
#wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    transform-style: preserve-3d;
    transition: transform 0.1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.clock-chassis {
    position: relative;
    background: linear-gradient(145deg, var(--chassis-bg-1), var(--chassis-bg-2));
    padding: 28px;
    border-radius: 30px;
    transform-style: preserve-3d;
    box-shadow:
        0 40px 80px -15px rgba(0, 0, 0, 0.7),
        0 0 0 1px rgba(255, 255, 255, 0.08) inset,
        0 0 120px var(--chassis-shadow);
    transition: background 0.4s ease, box-shadow 0.4s ease;
}

.clock-chassis::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 30px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, transparent 40%);
    pointer-events: none;
}

.kinetic-grid {
    display: grid;
    grid-template-columns: repeat(11, 56px);
    grid-template-rows: repeat(5, 56px);
    gap: 6px;
}

/* ══════════════════════════════════════════════════
   CELLS
══════════════════════════════════════════════════ */
.cell {
    width: 56px;
    height: 56px;
    background: var(--cell-bg);
    border-radius: 50%;
    position: relative;
    overflow: hidden;
    box-shadow:
        inset 0 6px 12px var(--cell-shadow-inset-1),
        inset 0 1px 2px var(--cell-shadow-inset-2),
        0 0 0 1px var(--cell-border-glow);
    transition: background 0.4s ease, box-shadow 0.4s ease;
}

/* ══════════════════════════════════════════════════
   ARMS — 3-SPOKE
══════════════════════════════════════════════════ */
.arm {
    position: absolute;
    top: 50%;
    left: 50%;
    transform-origin: 50% 100%;
    z-index: 1;
    transition: transform 0.6s cubic-bezier(0.34, 1.35, 0.64, 1);
    filter: drop-shadow(0 3px 4px rgba(0, 0, 0, 0.8));
}

.arm-long {
    width: 4px;
    height: 48%;
    margin-top: -48%;
    margin-left: -2px;
    background: linear-gradient(180deg, var(--arm-long-1) 0%, var(--arm-long-2) 100%);
    border-radius: 4px 4px 1px 1px;
}

.arm-short {
    width: 4px;
    height: 38%;
    margin-top: -38%;
    margin-left: -2px;
    background: linear-gradient(180deg, var(--arm-short-1) 0%, var(--arm-short-2) 100%);
    border-radius: 4px 4px 1px 1px;
    z-index: 2;
}

.pivot {
    position: absolute;
    width: 10px;
    height: 10px;
    background: radial-gradient(circle at 30% 30%, var(--pivot-1), var(--pivot-2));
    border: 1px solid rgba(0, 0, 0, 0.4);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 4;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.9);
}


.bottom-console {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    transform: translateZ(40px);
}

.tabs {
    display: flex;
    background: var(--tabs-bg);
    padding: 6px;
    border-radius: 16px;
    border: 1px solid var(--tabs-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: background 0.4s ease, border-color 0.4s ease;
}

.tab {
    padding: 0.6rem 1.4rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--tab-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    user-select: none;
}

.tab.active {
    background: var(--tab-active-bg);
    color: var(--tab-active-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.tab:hover:not(.active) {
    color: var(--tab-active-color);
    opacity: 0.85;
}

.panel {
    display: none;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.panel.active {
    display: flex;
}

button {
    background: var(--panel-btn-bg);
    color: var(--panel-btn-color);
    border: 1px solid var(--panel-btn-border);
    padding: 0.7rem 1.1rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

button:hover {
    background: var(--panel-btn-hover-bg);
    color: var(--panel-btn-hover-color);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

button:active {
    transform: translateY(0) scale(0.97);
}

.btn-accent {
    color: var(--accent-color);
    border-color: var(--accent-border);
}

.btn-accent:hover {
    box-shadow: 0 4px 16px rgba(96, 165, 250, 0.2);
}

/* ══════════════════════════════════════════════════
   LAP LIST
══════════════════════════════════════════════════ */
.lap-list {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: var(--lap-bg);
    border: 1px solid var(--lap-border);
    border-radius: 14px;
    padding: 0.8rem 1rem;
    max-height: 130px;
    overflow-y: auto;
    width: 280px;
    transition: background 0.4s ease;
    scrollbar-width: thin;
    scrollbar-color: var(--fab-hover-bg) var(--lap-scrollbar-track);
}

.lap-list.visible {
    display: flex;
}

.lap-list::-webkit-scrollbar {
    width: 3px;
}

.lap-list::-webkit-scrollbar-track {
    background: var(--lap-scrollbar-track);
    border-radius: 10px;
}

.lap-list::-webkit-scrollbar-thumb {
    background: var(--fab-hover-bg);
    border-radius: 10px;
}

.lap-list::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

.lap-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 2px;
    border-bottom: 1px solid var(--lap-item-border);
    font-size: 0.78rem;
    animation: fadeSlideIn 0.3s ease;
}

.lap-item:last-child {
    border-bottom: none;
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.lap-num {
    color: var(--lap-num-color);
    font-weight: 700;
    font-size: 0.72rem;
}

.lap-time {
    color: var(--lap-time-color);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.lap-delta {
    font-size: 0.7rem;
    font-variant-numeric: tabular-nums;
    opacity: 0.7;
}

.lap-item.best .lap-time { color: var(--lap-best-color); }
.lap-item.worst .lap-time { color: var(--lap-worst-color); }

/* ══════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════ */
.footer-credits {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    margin-top: 0.2rem;
}

.made-by {
    font-size: 0.85rem;
    color: var(--footer-color);
}

.made-by a {
    color: var(--footer-link-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.made-by a:hover {
    color: var(--accent-color);
}

.heart-icon {
    color: #ef4444;
    animation: pulse 1.5s infinite ease-in-out;
    margin: 0 2px;
}

@keyframes pulse {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.18); }
    100% { transform: scale(1); }
}

.github-links {
    display: flex;
    gap: 0.8rem;
}

.gh-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--gh-btn-bg);
    border: 1px solid var(--gh-btn-border);
    color: var(--gh-btn-color);
    padding: 6px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.gh-btn:hover {
    background: var(--gh-btn-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.gh-btn .count {
    background: var(--gh-cnt-bg);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.72rem;
    margin-left: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.gh-btn .fa-star {
    color: #fcd34d;
}

/* ══════════════════════════════════════════════════
   FULLSCREEN MODE
══════════════════════════════════════════════════ */

:fullscreen .footer-credits,
:-webkit-full-screen .footer-credits,
:-moz-full-screen .footer-credits {
    display: none !important;
}

:fullscreen body,
:-webkit-full-screen body,
:-moz-full-screen body {
    justify-content: center;
    align-items: center;
    padding: 1rem;
    gap: 1.5rem;
}

:fullscreen .clock-chassis,
:-webkit-full-screen .clock-chassis,
:-moz-full-screen .clock-chassis {
    transform: scale(1.2);
    transform-origin: center center;
    transition: transform 0.5s cubic-bezier(0.34, 1.2, 0.64, 1), background 0.4s ease, box-shadow 0.4s ease;
}

.is-fullscreen .footer-credits {
    display: none !important;
}

.is-fullscreen .floating-controls {
    position: fixed;
    z-index: 1000;
}

.is-fullscreen .bottom-console::after,
:fullscreen .bottom-console::after,
:-webkit-full-screen .bottom-console::after,
:-moz-full-screen .bottom-console::after {
    content: 'Press F or Esc to exit';
    display: block;
    text-align: center;
    font-size: 0.68rem;
    color: rgba(148, 163, 184, 0.35);
    letter-spacing: 0.07em;
    margin-top: 0.4rem;
    pointer-events: none;
}

/* ══════════════════════════════════════════════════
   TIMER PROGRESS RING (on chassis)
══════════════════════════════════════════════════ */
.timer-ring-wrap {
    position: absolute;
    top: -8px; left: -8px; right: -8px; bottom: -8px;
    border-radius: 36px;
    pointer-events: none;
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.timer-ring-wrap.visible {
    opacity: 1;
}

.timer-ring-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 36px;
    border: 3px solid transparent;
    box-shadow: inset 0 0 0 3px var(--accent-color);
    animation: timerPulse 2s ease-in-out infinite;
}

@keyframes timerPulse {
    0%, 100% { opacity: 0.25; }
    50% { opacity: 0.65; }
}

/* ══════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════ */
@media (max-width: 720px) {
    .kinetic-grid {
        grid-template-columns: repeat(11, 44px);
        grid-template-rows: repeat(5, 44px);
        gap: 4px;
    }

    .cell {
        width: 44px;
        height: 44px;
    }

    .clock-chassis {
        padding: 18px;
    }

    body {
        padding: 1rem;
        gap: 1.2rem;
    }

    .tab {
        padding: 0.5rem 0.9rem;
        font-size: 0.76rem;
    }
}

@media (max-width: 500px) {
    .kinetic-grid {
        grid-template-columns: repeat(11, 32px);
        grid-template-rows: repeat(5, 32px);
        gap: 3px;
    }

    .cell {
        width: 32px;
        height: 32px;
    }

    .clock-chassis {
        padding: 12px;
        border-radius: 20px;
    }
}