@import url('https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,100;0,300;0,400;0,700;0,900;1,100;1,300;1,400;1,700;1,900&family=Share+Tech+Mono&family=VT323&display=swap');

:root {
    color-scheme: light dark;

    --bg: #f4f4f7;
    --fg: #1a1a1f;
    --muted: #6b6b75;
    --digit-bg: rgba(255, 255, 255, 0.35);
    --digit-fg: #1a1a1f;
    --digit-border: rgba(255, 255, 255, 0.55);
    --digit-highlight: rgba(255, 255, 255, 0.75);
    --digit-gloss: linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0) 55%);
    --digit-seam: rgba(0, 0, 0, 0.08);
    --digit-shadow: 0 25px 50px -12px rgba(26, 26, 31, 0.22);
    --separator: #1a1a1f;
    --btn-bg: rgba(255, 255, 255, 0.45);
    --btn-fg: #1a1a1f;
    --btn-border: rgba(255, 255, 255, 0.6);
    --btn-hover-bg: rgba(255, 255, 255, 0.7);
    --github-icon-invert: 0;

    --blob-1: rgba(255, 154, 158, 0.85);
    --blob-2: rgba(160, 196, 255, 0.85);
    --blob-3: rgba(186, 230, 200, 0.80);
    --blob-4: rgba(255, 214, 165, 0.85);
    --blob-opacity: 0.55;
    --blob-blur: 80px;
}

[data-theme="dark"] {
    --bg: #0d0e12;
    --fg: #f4f4f7;
    --muted: #8a8a95;
    --digit-bg: rgba(28, 30, 38, 0.45);
    --digit-fg: #f4f4f7;
    --digit-border: rgba(255, 255, 255, 0.10);
    --digit-highlight: rgba(255, 255, 255, 0.12);
    --digit-gloss: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 55%);
    --digit-seam: rgba(0, 0, 0, 0.55);
    --digit-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    --separator: #f4f4f7;
    --btn-bg: rgba(28, 30, 38, 0.55);
    --btn-fg: #f4f4f7;
    --btn-border: rgba(255, 255, 255, 0.12);
    --btn-hover-bg: rgba(42, 45, 54, 0.75);
    --github-icon-invert: 1;

    --blob-1: rgba(94, 53, 177, 0.55);
    --blob-2: rgba(13, 71, 161, 0.55);
    --blob-3: rgba(0, 105, 92, 0.50);
    --blob-4: rgba(136, 14, 79, 0.50);
    --blob-opacity: 0.45;
    --blob-blur: 90px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #0d0e12;
        --fg: #f4f4f7;
        --muted: #8a8a95;
        --digit-bg: rgba(28, 30, 38, 0.45);
        --digit-fg: #f4f4f7;
        --digit-border: rgba(255, 255, 255, 0.10);
        --digit-highlight: rgba(255, 255, 255, 0.12);
        --digit-gloss: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 55%);
        --digit-seam: rgba(0, 0, 0, 0.55);
        --digit-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
        --separator: #f4f4f7;
        --btn-bg: rgba(28, 30, 38, 0.55);
        --btn-fg: #f4f4f7;
        --btn-border: rgba(255, 255, 255, 0.12);
        --btn-hover-bg: rgba(42, 45, 54, 0.75);
        --github-icon-invert: 1;

        --blob-1: rgba(94, 53, 177, 0.55);
        --blob-2: rgba(13, 71, 161, 0.55);
        --blob-3: rgba(0, 105, 92, 0.50);
        --blob-4: rgba(136, 14, 79, 0.50);
        --blob-opacity: 0.45;
        --blob-blur: 90px;
    }
}

/* Seasonal palette overrides (auto-applied via JS or via #hash preview) */
[data-season="halloween"] {
    --blob-1: rgba(255, 117, 24, 0.85);
    --blob-2: rgba(106, 13, 173, 0.85);
    --blob-3: rgba(57, 255, 20, 0.6);
    --blob-4: rgba(20, 0, 30, 0.85);
}

[data-season="christmas"] {
    --blob-1: rgba(200, 16, 46, 0.85);
    --blob-2: rgba(0, 103, 71, 0.85);
    --blob-3: rgba(255, 215, 0, 0.7);
    --blob-4: rgba(255, 255, 255, 0.55);
}

[data-season="nye"] {
    --blob-1: rgba(255, 215, 0, 0.85);
    --blob-2: rgba(192, 192, 192, 0.85);
    --blob-3: rgba(13, 71, 161, 0.7);
    --blob-4: rgba(220, 20, 60, 0.75);
}

[data-season="valentines"] {
    --blob-1: rgba(255, 105, 180, 0.85);
    --blob-2: rgba(220, 20, 60, 0.85);
    --blob-3: rgba(255, 192, 203, 0.85);
    --blob-4: rgba(255, 255, 255, 0.55);
}

/* Skin overrides — use html[data-skin] so they win over theme rules */
html[data-skin="led"] {
    --bg: #040804;
    --fg: #39ff14;
    --muted: rgba(57, 255, 20, 0.5);
    --digit-bg: #0a0e0a;
    --digit-fg: #39ff14;
    --digit-border: rgba(57, 255, 20, 0.18);
    --digit-highlight: transparent;
    --digit-gloss: linear-gradient(180deg, rgba(57, 255, 20, 0.08) 0%, transparent 50%);
    --digit-seam: rgba(57, 255, 20, 0.15);
    --digit-shadow: 0 0 30px rgba(57, 255, 20, 0.25);
    --separator: #39ff14;
    --btn-bg: rgba(10, 14, 10, 0.6);
    --btn-fg: #39ff14;
    --btn-border: rgba(57, 255, 20, 0.25);
    --btn-hover-bg: rgba(57, 255, 20, 0.15);
}

html[data-skin="flip"] {
    --bg: #1a1410;
    --fg: #f5e6d3;
    --muted: rgba(245, 230, 211, 0.55);
    --digit-fg: #f5e6d3;
    --digit-border: rgba(0, 0, 0, 0.6);
    --digit-highlight: rgba(255, 255, 255, 0.04);
    --digit-gloss: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    --digit-seam: rgba(0, 0, 0, 0.85);
    --digit-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --separator: #f5e6d3;
    --btn-bg: rgba(44, 37, 32, 0.7);
    --btn-fg: #f5e6d3;
    --btn-border: rgba(245, 230, 211, 0.2);
    --btn-hover-bg: rgba(245, 230, 211, 0.15);
}

html[data-skin="terminal"] {
    --digit-bg: transparent;
    --digit-border: var(--fg);
    --digit-highlight: transparent;
    --digit-gloss: none;
    --digit-seam: transparent;
    --digit-shadow: none;
    --separator: var(--fg);
}

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

html,
body {
    height: 100%;
    font-family: "Lato", sans-serif;
}

html {
    overflow-x: clip;
}

body {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: 1rem;
    background-color: var(--bg);
    color: var(--fg);
    overflow-x: clip;
    isolation: isolate;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: -20%;
    z-index: -1;
    pointer-events: none;
    opacity: var(--blob-opacity);
    filter: blur(var(--blob-blur));
    will-change: transform, filter;
}

body::before {
    background-image:
        radial-gradient(38% 42% at 18% 28%, var(--blob-1), transparent 70%),
        radial-gradient(32% 38% at 82% 18%, var(--blob-2), transparent 70%);
    animation:
        blob-drift-a 14s ease-in-out infinite alternate,
        blob-hue 30s linear infinite;
}

body::after {
    background-image:
        radial-gradient(36% 38% at 72% 78%, var(--blob-3), transparent 70%),
        radial-gradient(28% 32% at 22% 82%, var(--blob-4), transparent 70%);
    animation:
        blob-drift-b 18s ease-in-out infinite alternate,
        blob-hue 35s linear infinite reverse;
    animation-delay: -6s, 0s;
}

@keyframes blob-drift-a {
    0%   { transform: translate3d(0, 0, 0) scale(1) rotate(0deg); }
    25%  { transform: translate3d(-8%, 5%, 0) scale(1.12) rotate(8deg); }
    50%  { transform: translate3d(-3%, -6%, 0) scale(0.94) rotate(-6deg); }
    75%  { transform: translate3d(6%, 4%, 0) scale(1.1) rotate(10deg); }
    100% { transform: translate3d(4%, -4%, 0) scale(0.96) rotate(-8deg); }
}

@keyframes blob-drift-b {
    0%   { transform: translate3d(0, 0, 0) scale(1) rotate(0deg); }
    25%  { transform: translate3d(7%, -5%, 0) scale(0.9) rotate(-7deg); }
    50%  { transform: translate3d(-5%, 7%, 0) scale(1.14) rotate(9deg); }
    75%  { transform: translate3d(-8%, -3%, 0) scale(1.05) rotate(-10deg); }
    100% { transform: translate3d(5%, 6%, 0) scale(0.92) rotate(6deg); }
}

@keyframes blob-hue {
    0%   { filter: blur(var(--blob-blur)) hue-rotate(0deg); }
    100% { filter: blur(var(--blob-blur)) hue-rotate(360deg); }
}

.bg-particles {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.5s ease;
}

[data-particles="off"] .bg-particles {
    opacity: 0;
}

.particle {
    position: absolute;
    left: var(--x, 50%);
    top: 110%;
    width: var(--size, 14px);
    height: var(--size, 14px);
    background-color: var(--color, var(--fg));
    border-radius: 50%;
    opacity: 0.55;
    filter:
        drop-shadow(0 0 4px var(--color, var(--fg)))
        drop-shadow(0 0 10px var(--color, var(--fg)));
    animation: particle-float var(--duration, 22s) linear infinite;
    animation-delay: var(--delay, 0s);
    will-change: transform, opacity;
}

.particle.square {
    border-radius: 24%;
}

.particle.ring {
    background-color: transparent;
    border: 2px solid var(--color, var(--fg));
    opacity: 0.7;
}

.particle.triangle {
    border-radius: 0;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.particle.diamond {
    border-radius: 0;
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.particle.hexagon {
    border-radius: 0;
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}

.particle.star {
    border-radius: 0;
    clip-path: polygon(
        50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%,
        50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%
    );
}

.particle.plus {
    border-radius: 0;
    clip-path: polygon(
        35% 0%, 65% 0%, 65% 35%, 100% 35%,
        100% 65%, 65% 65%, 65% 100%, 35% 100%,
        35% 65%, 0% 65%, 0% 35%, 35% 35%
    );
}

.particle.blob {
    border-radius: 65% 35% 50% 50% / 55% 45% 55% 45%;
}

@keyframes particle-float {
    0% {
        transform: translate3d(0, 0, 0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.7;
    }
    50% {
        transform: translate3d(30px, -60vh, 0) rotate(180deg);
        opacity: 0.75;
    }
    90% {
        opacity: 0.4;
    }
    100% {
        transform: translate3d(-15px, -125vh, 0) rotate(360deg);
        opacity: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .particle {
        animation: none;
        top: auto;
        bottom: var(--x, 30%);
        opacity: 0.08;
    }
}

@media (prefers-reduced-motion: reduce) {
    body::before,
    body::after {
        animation: none;
    }
}

.root-container {
    width: 100%;
    max-width: 1600px;
    padding: clamp(1rem, 3vw, 2rem) 0;
}

.mode-switcher {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    gap: 0.35rem;
    padding: 0.3rem;
    border-radius: 0.85rem;
    background-color: var(--btn-bg);
    border: 1px solid var(--btn-border);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    box-shadow:
        0 10px 25px -10px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 var(--digit-highlight);
}

@media (max-width: 480px) {
    .mode-switcher {
        top: 0.6rem;
        right: 0.6rem;
        gap: 0.2rem;
        padding: 0.2rem;
    }
}

.mode-btn {
    background-color: transparent;
    color: var(--btn-fg);
    border: none;
    border-radius: 0.6rem;
    padding: 0.45rem 0.95rem;
    font-family: inherit;
    font-weight: 700;
    font-size: clamp(0.7rem, 1.3vw, 0.8rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition:
        background-color 0.3s ease,
        color 0.3s ease;
}

.mode-btn:hover {
    background-color: var(--btn-hover-bg);
}

.mode-btn.active {
    background-color: var(--fg);
    color: var(--bg);
}

@media (max-width: 480px) {
    .mode-btn {
        padding: 0.4rem 0.7rem;
        letter-spacing: 0.05em;
    }
}

.mode-btn:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 2px;
}

.clock-controls {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 0.65rem;
    padding: 0.65rem 0.9rem;
    border-radius: 0.95rem;
    background-color: var(--btn-bg);
    border: 1px solid var(--btn-border);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    box-shadow:
        0 10px 25px -10px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 var(--digit-highlight);
    max-width: calc(100vw - 2rem);
}

.root-container[data-mode="stopwatch"] .clock-controls,
.root-container[data-mode="timer"] .clock-controls {
    display: flex;
}

.controls-group {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
}

@media (max-width: 600px) {
    .clock-controls {
        bottom: 4rem;
    }
}

.controls-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.control-btn {
    background-color: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    border-radius: 0.75rem;
    padding: 0.7rem 1.75rem;
    font-family: inherit;
    font-weight: 700;
    font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    min-width: 6.5rem;
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    box-shadow:
        0 10px 25px -10px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 var(--digit-highlight);
    transition:
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        transform 0.2s ease;
}

.control-btn:hover {
    background-color: var(--btn-hover-bg);
    transform: translateY(-2px);
}

.control-btn.primary {
    background-color: var(--fg);
    color: var(--bg);
    border-color: var(--fg);
}

.control-btn:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 2px;
}

.timer-presets {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    justify-content: center;
}

.preset-btn {
    background-color: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    border-radius: 0.55rem;
    padding: 0.4rem 0.95rem;
    font-family: inherit;
    font-weight: 700;
    font-size: clamp(0.75rem, 1.3vw, 0.85rem);
    letter-spacing: 0.05em;
    cursor: pointer;
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    transition:
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        transform 0.15s ease;
}

.preset-btn:hover {
    background-color: var(--btn-hover-bg);
    transform: translateY(-1px);
}

.preset-btn.active {
    background-color: var(--fg);
    color: var(--bg);
    border-color: var(--fg);
}

.preset-btn:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 2px;
}

.timer-adjusters {
    display: flex;
    gap: 0.45rem;
    justify-content: center;
    transition: opacity 0.3s ease;
}

.adjuster {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    min-width: 2.5rem;
}

.adjuster-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    text-align: center;
    padding: 0.15rem 0;
    user-select: none;
}

.adjust-btn {
    background-color: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    border-radius: 0.4rem;
    padding: 0.25rem 0;
    font-family: inherit;
    font-weight: 700;
    font-size: 0.9rem;
    line-height: 1;
    cursor: pointer;
    transition:
        background-color 0.2s ease,
        color 0.2s ease,
        transform 0.1s ease;
}

.adjust-btn:hover {
    background-color: var(--btn-hover-bg);
}

.adjust-btn:active {
    transform: scale(0.94);
}

.adjust-btn:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 2px;
}

.root-container.timer-running .timer-adjusters,
.root-container.timer-running .timer-presets {
    opacity: 0.4;
    pointer-events: none;
}

.root-container[data-mode="stopwatch"] .controls-group[data-controls="stopwatch"],
.root-container[data-mode="timer"] .controls-group[data-controls="timer"] {
    display: flex;
}

.root-container[data-mode="stopwatch"] .clock-top-header,
.root-container[data-mode="stopwatch"] .clock-bottom-header,
.root-container[data-mode="timer"] .clock-top-header,
.root-container[data-mode="timer"] .clock-bottom-header {
    display: none;
}

.root-container[data-mode="timer"] .group-container[data-type="ampm"],
.root-container[data-mode="timer"] .digital-clock-container > .separator:last-of-type {
    display: none;
}

.root-container.timer-complete .digital-clock-container .digit-item {
    animation: timer-flash 0.55s ease-in-out 5;
}

@keyframes timer-flash {
    0%, 100% { box-shadow: var(--digit-shadow), inset 0 1px 0 var(--digit-highlight); }
    50% {
        box-shadow:
            0 0 0 3px rgba(239, 68, 68, 0.65),
            0 25px 50px -12px rgba(239, 68, 68, 0.6),
            inset 0 1px 0 var(--digit-highlight);
    }
}

@media (prefers-reduced-motion: reduce) {
    .root-container.timer-complete .digital-clock-container .digit-item {
        animation: none;
    }
}

.digital-clock-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: clamp(0.5rem, 2vw, 1rem);
    padding: clamp(1rem, 3vw, 2rem) 0;
    flex-wrap: wrap;
}

.digital-clock-container .group-container {
    display: flex;
    justify-content: center;
    gap: clamp(0.35rem, 1vw, 0.75rem);
    position: relative;
    margin-bottom: clamp(2rem, 3vw, 2.25rem);
}

.digital-clock-container .digit-item-type {
    position: absolute;
    bottom: clamp(-2.5rem, -4vw, -2rem);
    inset-inline: 0;
    text-align: center;
    user-select: none;
    font-size: clamp(0.7rem, 1.1vw, 0.85rem);
    font-weight: 700;
    color: var(--muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.digital-clock-container .group-container .digit-item {
    --size: clamp(3.25rem, 11vw, 10rem);
    height: var(--size);
    width: calc(var(--size) * 0.86);
    font-size: calc(var(--size) - 1.5rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1;
    display: flex;
    color: var(--digit-fg);
    background-color: var(--digit-bg);
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    justify-content: center;
    align-items: center;
    border-radius: clamp(0.75rem, 1.4vw, 1.5rem);
    position: relative;
    overflow: hidden;
    isolation: isolate;
    border: 1px solid var(--digit-border);
    box-shadow:
        var(--digit-shadow),
        inset 0 1px 0 var(--digit-highlight);
    user-select: none;
    cursor: pointer;
    transition:
        transform 0.4s ease-in-out,
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease;
}

.digital-clock-container .group-container .digit-item.spin {
    animation: digit-spin 0.75s cubic-bezier(0.45, 0.05, 0.25, 1);
}

@keyframes digit-spin {
    0%   { transform: perspective(500px) rotateY(0deg) scale(1); }
    50%  { transform: perspective(500px) rotateY(180deg) scale(1.12); }
    100% { transform: perspective(500px) rotateY(360deg) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    .digital-clock-container .group-container .digit-item.spin {
        animation: none;
    }
}

/* LED 7-segment skin */
html[data-skin="led"] .digital-clock-container .group-container .digit-item {
    font-family: 'VT323', 'Courier New', monospace;
    font-weight: 400;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-radius: 0.35rem;
    text-shadow:
        0 0 6px rgba(57, 255, 20, 0.85),
        0 0 14px rgba(57, 255, 20, 0.55),
        0 0 24px rgba(57, 255, 20, 0.3);
}

html[data-skin="led"] .clock-header-day,
html[data-skin="led"] .clock-header-date,
html[data-skin="led"] .clock-header-month,
html[data-skin="led"] .clock-header-year {
    font-family: 'VT323', 'Courier New', monospace;
    text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
}

/* Flip-board skin */
html[data-skin="flip"] .digital-clock-container .group-container .digit-item {
    background:
        linear-gradient(180deg,
            #2c2520 0%,
            #2c2520 49.5%,
            #14100c 50%,
            #1a1410 100%);
    background-color: #2c2520;
    color: #f5e6d3;
    font-family: Georgia, 'Times New Roman', serif;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-radius: 0.5rem;
    border: 1px solid rgba(0, 0, 0, 0.6);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.06),
        inset 0 -2px 6px rgba(0, 0, 0, 0.4);
}

html[data-skin="flip"] .digital-clock-container .group-container .digit-item::before {
    background: linear-gradient(180deg,
        rgba(255, 255, 255, 0.08) 0%,
        rgba(255, 255, 255, 0) 45%);
}

html[data-skin="flip"] .digital-clock-container .group-container .digit-item::after {
    height: 2px;
    background: rgba(0, 0, 0, 0.85);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

/* Terminal skin */
html[data-skin="terminal"] .digital-clock-container .group-container .digit-item {
    background-color: transparent;
    color: var(--fg);
    border: 2px solid var(--fg);
    border-radius: 0;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    font-family: 'Share Tech Mono', 'Courier New', monospace;
    font-weight: 700;
}

html[data-skin="terminal"] .digital-clock-container .group-container .digit-item::before,
html[data-skin="terminal"] .digital-clock-container .group-container .digit-item::after {
    display: none;
}

html[data-skin="terminal"] .clock-header-day,
html[data-skin="terminal"] .clock-header-date,
html[data-skin="terminal"] .clock-header-month,
html[data-skin="terminal"] .clock-header-year {
    font-family: 'Share Tech Mono', 'Courier New', monospace;
}

html[data-skin="terminal"] .digital-clock-container .separator-item {
    border-radius: 0;
}

/* Burst particles (spawned on background click) */
.burst-particle {
    position: fixed;
    width: var(--size, 8px);
    height: var(--size, 8px);
    background-color: var(--color, #fff);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1500;
    transform: translate(-50%, -50%);
    filter:
        drop-shadow(0 0 4px var(--color, #fff))
        drop-shadow(0 0 10px var(--color, #fff));
    animation: burst 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    will-change: transform, opacity;
}

@keyframes burst {
    0% {
        transform: translate(-50%, -50%) scale(0.4);
        opacity: 0;
    }
    15% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.15);
    }
    100% {
        transform:
            translate(calc(-50% + var(--dx, 0px)),
                      calc(-50% + var(--dy, 0px)))
            scale(0.25);
        opacity: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .burst-particle { display: none; }
}

/* Keyboard shortcuts overlay */
.shortcuts-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background-color: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: overlay-fade 0.2s ease-out;
}

.shortcuts-overlay[hidden] {
    display: none;
}

.shortcuts-card {
    position: relative;
    background-color: var(--btn-bg);
    color: var(--fg);
    border: 1px solid var(--btn-border);
    border-radius: 1.25rem;
    padding: 2rem 2.25rem;
    max-width: 32rem;
    width: 100%;
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    box-shadow:
        0 30px 60px -20px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 var(--digit-highlight);
    animation: card-rise 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.shortcuts-card h2 {
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
    color: var(--fg);
}

.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.shortcuts-list > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.shortcuts-list dt {
    display: flex;
    gap: 0.3rem;
    flex-shrink: 0;
}

.shortcuts-list dd {
    font-size: 0.875rem;
    color: var(--muted);
    text-align: right;
}

.shortcuts-list kbd {
    background-color: var(--btn-hover-bg);
    border: 1px solid var(--btn-border);
    border-radius: 0.35rem;
    padding: 0.15rem 0.55rem;
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--fg);
    box-shadow: 0 2px 0 var(--btn-border);
    min-width: 1.5rem;
    text-align: center;
}

.shortcuts-hint {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--btn-border);
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.5;
}

.shortcuts-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background-color: transparent;
    border: 0;
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--fg);
    transition: background-color 0.2s ease;
}

.shortcuts-close:hover {
    background-color: var(--btn-hover-bg);
}

@keyframes overlay-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes card-rise {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    .shortcuts-overlay,
    .shortcuts-card {
        animation: none;
    }
}

.digital-clock-container .group-container .digit-item::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--digit-gloss);
    pointer-events: none;
    z-index: -1;
}

.digital-clock-container .group-container .digit-item::after {
    content: "";
    position: absolute;
    inset-inline: 0;
    top: 50%;
    height: 1px;
    background: var(--digit-seam);
    pointer-events: none;
}


.digital-clock-container .separator {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: clamp(0.75rem, 2vw, 1.25rem);
    height: clamp(3.25rem, 11vw, 10rem);
}

.digital-clock-container .separator-item {
    width: clamp(0.45rem, 1vw, 0.75rem);
    height: clamp(0.45rem, 1vw, 0.75rem);
    background-color: var(--separator);
    border-radius: 50%;
    transition: background-color 0.3s ease;
    animation: colon-pulse 1.2s ease-in-out infinite alternate;
}

.digital-clock-container .separator-item:last-child {
    animation-delay: 0.15s;
}

@keyframes colon-pulse {
    from { opacity: 0.25; transform: scale(0.85); }
    to   { opacity: 0.9;  transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    .digital-clock-container .separator-item {
        animation: none;
        opacity: 0.7;
    }
}

@media (max-width: 560px) {
    .digital-clock-container {
        flex-direction: column;
        gap: clamp(1.75rem, 6vw, 2.5rem);
    }

    .digital-clock-container .separator {
        display: none;
    }
}

.clock-header-container {
    display: flex;
    justify-content: center;
    align-items: baseline;
    flex-wrap: wrap;
    gap: clamp(0.5rem, 2vw, 1rem);
    color: var(--fg);
    padding: clamp(0.5rem, 2vw, 1rem) 0;
    user-select: none;
    transition: color 0.3s ease;
}

.clock-header-day {
    font-size: clamp(1.1rem, 3.5vw, 2.5rem);
    font-weight: 300;
    letter-spacing: clamp(0.25rem, 1vw, 0.6rem);
    text-transform: uppercase;
}

.clock-header-date {
    font-size: clamp(1.5rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1;
}

.clock-header-month {
    font-size: clamp(1rem, 2.5vw, 1.65rem);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
}

.clock-header-year {
    font-size: clamp(1rem, 2.5vw, 1.65rem);
    font-weight: 600;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.action-btn {
    position: fixed;
    bottom: 1rem;
    background-color: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    border-radius: 0.75rem;
    cursor: pointer;
    z-index: 1000;
    padding: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    box-shadow:
        0 10px 25px -10px var(--digit-shadow),
        inset 0 1px 0 var(--digit-highlight);
    transition:
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        transform 0.2s ease,
        filter 0.3s ease;
}

.action-btn:hover {
    background-color: var(--btn-hover-bg);
    transform: translateY(-2px);
}

.action-btn:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 2px;
}

#fullscreen-btn {
    right: 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    justify-items: center;
    align-items: center;
    gap: 0.55rem;
    padding: 0.5rem;
}

#theme-btn {
    right: 4rem;
}

#particles-btn {
    right: 7rem;
}

#skin-btn {
    right: 10rem;
}

#shortcuts-btn {
    right: 13rem;
}

.github-btn {
    right: 16rem;
}

@media (max-width: 720px) {
    #shortcuts-btn,
    .github-btn {
        display: none;
    }
}

.github-btn img {
    max-height: 1.25rem;
    width: auto;
    object-fit: contain;
    filter: invert(var(--github-icon-invert));
    transition: filter 0.3s ease;
}

.fullscreen-icon {
    width: 0.3rem;
    height: 0.3rem;
    display: block;
    background-color: transparent;
}

.fullscreen-btn .fullscreen-icon:nth-child(1) {
    border-inline-start: 2px solid var(--btn-fg);
    border-block-start: 2px solid var(--btn-fg);
}

.fullscreen-btn .fullscreen-icon:nth-child(2) {
    border-inline-end: 2px solid var(--btn-fg);
    border-block-start: 2px solid var(--btn-fg);
}

.fullscreen-btn .fullscreen-icon:nth-child(3) {
    border-inline-start: 2px solid var(--btn-fg);
    border-block-end: 2px solid var(--btn-fg);
}

.fullscreen-btn .fullscreen-icon:nth-child(4) {
    border-inline-end: 2px solid var(--btn-fg);
    border-block-end: 2px solid var(--btn-fg);
}

.particles-icon {
    position: relative;
    width: 1.25rem;
    height: 1.25rem;
    display: block;
}

.particles-icon span {
    position: absolute;
    width: 0.35rem;
    height: 0.35rem;
    border-radius: 50%;
    background-color: var(--btn-fg);
    transition: background-color 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
}

.particles-icon span:nth-child(1) { top: 0; left: 50%; transform: translateX(-50%); }
.particles-icon span:nth-child(2) { bottom: 0.05rem; left: 0.05rem; }
.particles-icon span:nth-child(3) { bottom: 0.05rem; right: 0.05rem; }

[data-particles="off"] .particles-icon span {
    background-color: transparent;
    box-shadow: inset 0 0 0 1px var(--btn-fg);
    opacity: 0.55;
}

.skin-icon {
    position: relative;
    width: 1.2rem;
    height: 1.2rem;
    display: block;
}

.skin-icon span {
    position: absolute;
    width: 0.6rem;
    height: 0.6rem;
    border: 2px solid var(--btn-fg);
    background-color: transparent;
    border-radius: 0.15rem;
    transition: transform 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}

.skin-icon span:nth-child(1) { top: 0; left: 0; }
.skin-icon span:nth-child(2) { top: 0.2rem; left: 0.2rem; opacity: 0.7; }
.skin-icon span:nth-child(3) { top: 0.4rem; left: 0.4rem; opacity: 0.45; background-color: var(--btn-fg); }

.shortcuts-icon {
    font-family: inherit;
    font-weight: 800;
    font-size: 1.15rem;
    line-height: 1;
    color: var(--btn-fg);
}

.theme-icon {
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 50%;
    background: transparent;
    box-shadow: inset 0 0 0 0.15rem var(--btn-fg);
    transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

[data-theme="dark"] .theme-icon {
    background: var(--btn-fg);
    box-shadow: inset 0.35rem -0.25rem 0 0.05rem var(--btn-bg);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-icon {
        background: var(--btn-fg);
        box-shadow: inset 0.35rem -0.25rem 0 0.05rem var(--btn-bg);
    }
}