/*
  Professional UI theme
  - clean neutral surfaces
  - consistent spacing + typography
  - responsive two-panel layout
*/

:root {
    color-scheme: dark;

    --bg0: #050814;
    --bg1: #070B14;
    --bg2: #0B1220;
    --text: rgba(248, 250, 252, 0.92);
    --muted: rgba(248, 250, 252, 0.68);
    --muted2: rgba(248, 250, 252, 0.52);

    --card: rgba(11, 18, 32, 0.74);
    --border: rgba(148, 163, 184, 0.22);
    --shadow: 0 22px 50px rgba(0, 0, 0, 0.45);

    --primary: #3B82F6;
    --primaryHover: #60A5FA;
    --danger: #DC2626;

    /* Product accents */
    --swA: #7C3AED;
    --swB: #2563EB;
    --cdA: #06B6D4;
    --cdB: #10B981;
    --pink: #EC4899;
    --amber: #F59E0B;

    --surface: rgba(15, 23, 42, 0.62);
    --surfaceSoft: rgba(15, 23, 42, 0.44);
    --surfaceTint: rgba(15, 23, 42, 0.28);

    --ring: rgba(59, 130, 246, 0.30);
    --hairline: rgba(15, 23, 42, 0.35);
    --cardGradTop: rgba(255, 255, 255, 0.06);
    --cardGradBottom: rgba(255, 255, 255, 0.02);

    --radius: 16px;
    --radiusSm: 12px;
    --maxW: 1040px;
}

/* Note: forced dark mode by default (ignores OS preference). */

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(1100px 650px at 12% -10%, rgba(124, 58, 237, 0.20), transparent 55%),
        radial-gradient(980px 560px at 92% 2%, rgba(6, 182, 212, 0.18), transparent 52%),
        radial-gradient(900px 520px at 50% 112%, rgba(236, 72, 153, 0.10), transparent 60%),
        radial-gradient(800px 520px at 72% 110%, rgba(16, 185, 129, 0.08), transparent 62%),
        linear-gradient(180deg, var(--bg1), var(--bg2));
}

.bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.25)),
        radial-gradient(900px 180px at 50% 0%, rgba(255, 255, 255, 0.22), transparent 70%),
        repeating-linear-gradient(90deg,
            rgba(255, 255, 255, 0.00) 0px,
            rgba(255, 255, 255, 0.00) 44px,
            rgba(255, 255, 255, 0.02) 45px,
            rgba(255, 255, 255, 0.00) 46px);
    opacity: 0.55;
}

.app {
    width: min(var(--maxW), calc(100% - 40px));
    margin: 28px auto 40px;
    display: grid;
    gap: 18px;
}

.appHeader {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brandMark {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background:
        radial-gradient(14px 14px at 30% 30%, rgba(255, 255, 255, 0.70), transparent 60%),
        linear-gradient(135deg, var(--swA), var(--cdA));
    box-shadow: 0 16px 36px rgba(124, 58, 237, 0.20), 0 16px 36px rgba(6, 182, 212, 0.16);
}

.appTitle {
    margin: 0;
    font-size: 18px;
    letter-spacing: 0.2px;
    font-weight: 780;
}

.appSubtitle {
    margin: 3px 0 0;
    font-size: 13px;
    color: var(--muted);
}

.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(12, 1fr);
}

/* Per-card theming (gives it a product feel) */
.card {
    --accent1: var(--primary);
    --accent2: var(--primaryHover);
}

#stopWatch.card {
    --accent1: var(--swA);
    --accent2: var(--swB);
}

#countdownTimer.card {
    --accent1: var(--cdA);
    --accent2: var(--cdB);
}

.card {
    grid-column: span 6;
    background:
        radial-gradient(900px 180px at 20% 0%, rgba(37, 99, 235, 0.07), transparent 55%),
        linear-gradient(180deg, var(--cardGradTop), var(--cardGradBottom));
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    display: grid;
    gap: 14px;
    position: relative;
    overflow: hidden;
    transition: transform 140ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
    opacity: 0.95;
    pointer-events: none;
}

.card::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.40), rgba(255, 255, 255, 0.00) 35%),
        radial-gradient(900px 200px at 50% 0%, rgba(255, 255, 255, 0.30), transparent 60%);
    opacity: 0.35;
}

.card:hover {
    transform: translateY(-2px);
    border-color: rgba(37, 99, 235, 0.22);
    box-shadow: 0 28px 70px rgba(15, 23, 42, 0.16);
}

#stopWatch.card:hover {
    border-color: rgba(124, 58, 237, 0.30);
}

#countdownTimer.card:hover {
    border-color: rgba(6, 182, 212, 0.28);
}

@media (max-width: 820px) {
    .card {
        grid-column: span 12;
    }
}

.cardHeader {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
}

.cardTitle {
    margin: 0;
    font-size: 16px;
    letter-spacing: 0.2px;
    font-weight: 820;
}

.cardHint {
    margin: 0;
    font-size: 12px;
    color: var(--muted);
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background:
        radial-gradient(140px 60px at 20% 20%, rgba(255, 255, 255, 0.65), transparent 60%),
        linear-gradient(180deg, var(--surfaceTint), rgba(255, 255, 255, 0.00));
}

#stopWatch .cardHint {
    border-color: rgba(124, 58, 237, 0.22);
    color: color-mix(in srgb, var(--text) 72%, var(--swA) 28%);
}

#countdownTimer .cardHint {
    border-color: rgba(6, 182, 212, 0.22);
    color: color-mix(in srgb, var(--text) 70%, var(--cdA) 30%);
}

/* --- Stopwatch Analog Face --- */

.analogBlock {
    display: grid;
    justify-items: center;
    gap: 10px;
}

.analogFace {
    position: relative;
    width: min(320px, 100%);
    aspect-ratio: 1;
    margin: 0 auto;

    /* Dial center (tune these two to match your PNG) */
    --dial-x: 50.0%;
    --dial-y: 58.5%;

    /* Small sub-dial center (tune to match your PNG) */
    --subdial-x: 50.0%;
    --subdial-y: 48.0%;

    background-image: url("../images/stopwatch.png?v=20260111p");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

/* Hands: anchored at dial center and extend upward */
.hand {
    position: absolute;
    left: var(--dial-x);
    top: var(--dial-y);
    transform-origin: 50% 100%;
    transform: translate(-50%, -100%) rotate(0deg);
    background: transparent;
    background-repeat: no-repeat;
    background-position: center bottom;
    background-size: 100% 100%;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.22));
    pointer-events: none;
    z-index: 2;
}

.handSeconds {
    /* Main black hand (seconds) */
    width: 25px;
    height: 24%;
    background-image: url("../images/hand-minute.svg?v=20260111p");
    /* keep it black but readable on darker parts of the PNG */
    filter:
        drop-shadow(0 0 1px rgba(255, 255, 255, 0.80)) drop-shadow(0 2px 4px rgba(0, 0, 0, 0.22));
    z-index: 2;
}

.handMillis {
    /* Main red hand (milliseconds sweep) */
    width: 25px;
    height: 24%;
    background-image: url("../images/hand-second-red.svg?v=20260111p");
    z-index: 3;
}

.handMinutesSubdial {
    /* Small clock face: minute hand */
    display: block;
    left: var(--subdial-x);
    top: var(--subdial-y);
    width: 6px;
    height: 10%;
    background-image: url("../images/hand-minute.svg?v=20260111p");
    opacity: 0.95;
    z-index: 2;
}

.handCap {
    position: absolute;
    left: var(--dial-x);
    top: var(--dial-y);
    width: 10px;
    height: 10px;
    transform: translate(-50%, -50%);
    background: rgba(15, 23, 42, 0.92);
    border-radius: 999px;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.25);
    pointer-events: none;
    z-index: 3;
}

/* --- Displays --- */

.display {
    border-radius: var(--radiusSm);
    border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(247, 250, 255, 0.82));
    color: rgba(15, 23, 42, 0.92);
    padding: 14px;
    text-align: center;
    font-size: clamp(34px, 4.2vw, 52px);
    font-weight: 820;
    letter-spacing: 1px;
    font-variant-numeric: tabular-nums;
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08);
}

/* Give each display a subtle themed glow */
#stopWatch .display {
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(124, 58, 237, 0.10), 0 18px 42px rgba(124, 58, 237, 0.10);
}

#countdownTimer .display {
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(6, 182, 212, 0.10), 0 18px 42px rgba(6, 182, 212, 0.10);
}

.displaySmall {
    font-size: clamp(20px, 2.4vw, 28px);
    padding: 10px 12px;
    letter-spacing: 2px;
    width: min(360px, 100%);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-feature-settings: "tnum" 1;
}

.displayLabel {
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.24px;
}

.displayDigital {
    width: min(340px, 100%);
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: center;

    background:
        radial-gradient(900px 260px at 50% 0%, rgba(255, 255, 255, 0.12), transparent 60%),
        radial-gradient(900px 260px at 15% 100%, rgba(6, 182, 212, 0.14), transparent 62%),
        radial-gradient(900px 260px at 85% 100%, rgba(16, 185, 129, 0.10), transparent 62%),
        linear-gradient(180deg, rgba(11, 18, 32, 0.98), rgba(7, 11, 20, 0.98));
    color: rgba(248, 250, 252, 0.94);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    letter-spacing: 2px;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow:
        0 22px 50px rgba(0, 0, 0, 0.20),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* --- Controls / Inputs --- */

.controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    appearance: none;
    border: 1px solid var(--border);
    background: var(--surfaceSoft);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 12px;
    font-weight: 650;
    cursor: pointer;
    transition: transform 90ms ease, background-color 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.10);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px var(--ring), 0 12px 24px rgba(15, 23, 42, 0.10);
}

.btnPrimary {
    background: linear-gradient(135deg, var(--primary), var(--primaryHover));
    border-color: rgba(37, 99, 235, 0.45);
    color: #FFFFFF;
}

.btnPrimary:hover {
    filter: brightness(1.03) saturate(1.06);
}

/* Contextual primary buttons per card */
#stopWatch .btnPrimary {
    background: linear-gradient(135deg, var(--swA), var(--swB));
    border-color: rgba(124, 58, 237, 0.40);
}

#countdownTimer .btnPrimary {
    background: linear-gradient(135deg, var(--cdA), var(--cdB));
    border-color: rgba(6, 182, 212, 0.40);
}

.btnGhost {
    background: rgba(15, 23, 42, 0.04);
    box-shadow: none;
}

.btnIcon {
    width: 18px;
    height: 18px;
    display: inline-grid;
    place-items: center;
}

.btnIcon svg {
    width: 18px;
    height: 18px;
    display: block;
}

.field {
    display: grid;
    gap: 8px;
}

.fieldLabel {
    font-size: 12px;
    color: var(--muted);
}

.fieldRow {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 10px;
    align-items: center;
}

@media (max-width: 520px) {
    .fieldRow {
        grid-template-columns: 1fr;
    }

    .fieldRow .btn {
        width: 100%;
        justify-content: center;
    }
}

.input {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    padding: 11px 12px;
    font-size: 14px;
    outline: none;
    box-shadow: 0 10px 18px rgba(15, 23, 42, 0.06);
}

.input:focus {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: 0 0 0 4px var(--ring), 0 10px 18px rgba(15, 23, 42, 0.06);
}

.fieldHelp {
    font-size: 12px;
    color: var(--muted2);
}

.alert {
    display: block;
    min-height: 18px;
    font-size: 12px;
    color: var(--muted);
}

.appFooter {
    color: var(--muted2);
    font-size: 12px;
    text-align: center;
}

kbd {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surfaceSoft);
    box-shadow: 0 6px 14px rgba(15, 23, 42, 0.08);
}

.versionTag {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.16), rgba(6, 182, 212, 0.14));
}

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

    .card:hover,
    .btn:hover {
        transform: none;
    }
}