/* ================= Tokens ================= */
:root {
    --bg: #0b0b12;
    --surface: #14141d;
    --surface-2: #1b1b26;
    --surface-3: #232331;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text: #f3f2f8;
    --text-muted: #9c9bb0;
    --text-faint: #6c6b80;

    /* Group colours — the same cyan / magenta / white as the original */
    --keys: #22e6f2;
    --drums: #ff4fd8;
    --loops: #f1efff;

    --radius-lg: 24px;
    --radius: 16px;
    --radius-sm: 10px;

    --font: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
    --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    font-family: var(--font);
    color: var(--text);
    background-color: var(--bg);
    /* The original background image, dimmed so the pads stay the focus */
    background-image:
        radial-gradient(ellipse at 50% 30%, rgba(11, 11, 18, 0.35), rgba(11, 11, 18, 0.92) 75%),
        linear-gradient(rgba(11, 11, 18, 0.45), rgba(11, 11, 18, 0.45)),
        url("./assets/background.jpeg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
}

button,
input {
    font: inherit;
    color: inherit;
}

kbd {
    display: inline-block;
    min-width: 1.6em;
    padding: 0.1em 0.45em;
    border: 1px solid var(--border-strong);
    border-bottom-width: 2px;
    border-radius: 6px;
    background: var(--surface-2);
    font-family: var(--mono);
    font-size: 0.8em;
    font-weight: 700;
    text-align: center;
    color: var(--text);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* ================= Layout ================= */
.app {
    width: 100%;
    max-width: 1120px;
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0 auto;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 28px;
}

.header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px 24px;
}

.logo {
    margin: 0;
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
}

.logo__tag {
    margin-left: 0.3em;
    padding: 0.12em 0.35em;
    border-radius: 6px;
    background: var(--text);
    color: var(--bg);
    font-family: var(--mono);
    font-size: 0.42em;
    vertical-align: 0.55em;
}

.hint {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ================= Console ================= */
.console {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(27, 27, 38, 0.92), rgba(18, 18, 26, 0.94));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.05),
        0 30px 60px -20px rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ---------- Display ---------- */
.display {
    --accent: var(--text-faint);
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #0d0d14;
    box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.6);
    min-width: 0;
}

.display[data-group="hats"]  { --accent: var(--keys); }
.display[data-group="drums"] { --accent: var(--drums); }
.display[data-group="chords"] { --accent: var(--loops); }

.display__key {
    flex: none;
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 1.6rem;
    font-weight: 700;
    transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.display.is-bumped .display__key {
    animation: display-bump 0.35s var(--ease-out);
}

.display__info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.display__label {
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.display__name {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.display__type {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.display[data-group] .display__type { text-transform: capitalize; }

.display__status {
    flex: none;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.display__count {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Tiny equaliser that dances while something is playing */
.eq {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 20px;
}

.eq i {
    width: 4px;
    height: 4px;
    border-radius: 2px;
    background: var(--accent);
    opacity: 0.4;
    transition: height 0.3s, opacity 0.3s;
}

.display.is-active .eq i {
    opacity: 1;
    animation: eq 0.9s ease-in-out infinite alternate;
}

.display.is-active .eq i:nth-child(2) { animation-delay: -0.3s; animation-duration: 0.7s; }
.display.is-active .eq i:nth-child(3) { animation-delay: -0.6s; animation-duration: 1.1s; }
.display.is-active .eq i:nth-child(4) { animation-delay: -0.2s; animation-duration: 0.8s; }
.display.is-active .eq i:nth-child(5) { animation-delay: -0.5s; animation-duration: 1s; }

body.is-muted .display.is-active .eq i {
    animation: none;
    opacity: 0.4;
}

/* ---------- Pads ---------- */
.beatbox {
    display: grid;
    grid-template-columns: repeat(9, minmax(0, 1fr));
    gap: 12px;
}

.pad {
    --accent: var(--keys);
    --progress: 0;
    position: relative;
    min-height: 168px;
    padding: 16px 12px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(180deg, var(--surface-3), var(--surface));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.06),
        0 4px 0 #0a0a10,
        0 8px 16px -6px rgba(0, 0, 0, 0.6);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition:
        transform 0.12s var(--ease-out),
        box-shadow 0.12s var(--ease-out),
        border-color 0.2s,
        background-color 0.2s;
}

.pad--drums { --accent: var(--drums); }
.pad--chords { --accent: var(--loops); }

/* Status LED in the top-right corner */
.pad::before {
    content: "";
    position: absolute;
    top: 14px;
    right: 14px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.35;
    transition: opacity 0.2s, box-shadow 0.2s;
}

/* Light that flashes across the pad on each hit */
.pad::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at 50% 40%, var(--accent), transparent 75%);
    opacity: 0;
    pointer-events: none;
}

.pad__key {
    position: relative;
    margin-bottom: auto;
    align-self: flex-start;
    font-family: var(--mono);
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1;
    color: var(--text);
    transition: color 0.2s, text-shadow 0.2s;
}

.pad__name {
    position: relative;
    align-self: flex-start;
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.2;
    text-align: left;
}

.pad__type {
    position: relative;
    align-self: flex-start;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.pad__progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    background: var(--accent);
    transform: scaleX(var(--progress));
    transform-origin: left;
    opacity: 0;
    transition: opacity 0.2s;
}

/* Hover */
@media (hover: hover) {
    .pad:hover {
        border-color: color-mix(in srgb, var(--accent) 45%, transparent);
        transform: translateY(-2px);
        box-shadow:
            inset 0 1px 0 rgba(255, 255, 255, 0.08),
            0 6px 0 #0a0a10,
            0 14px 24px -8px rgba(0, 0, 0, 0.7),
            0 0 24px -8px var(--accent);
    }

    .pad:hover::before {
        opacity: 0.8;
    }

    .pad:hover .pad__key {
        color: var(--accent);
    }
}

/* Pressed — held key or pointer */
.pad.is-pressed,
.pad:active {
    transform: translateY(3px);
    border-color: var(--accent);
    background:
        linear-gradient(180deg,
            color-mix(in srgb, var(--accent) 16%, var(--surface-3)),
            color-mix(in srgb, var(--accent) 6%, var(--surface)));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 1px 0 #0a0a10,
        0 0 32px -6px var(--accent);
}

.pad.is-pressed .pad__key,
.pad:active .pad__key {
    color: var(--accent);
}

/* Triggered flash */
.pad.is-hit::after {
    animation: pad-hit 0.5s var(--ease-out);
}

.pad.is-hit .pad__key {
    color: var(--accent);
    text-shadow: 0 0 18px var(--accent);
}

/* Currently sounding */
.pad.is-playing::before {
    opacity: 1;
    box-shadow: 0 0 10px var(--accent);
    animation: led-pulse 1s ease-in-out infinite;
}

.pad.is-playing .pad__progress {
    opacity: 0.9;
}

/* Keyboard focus */
.pad:focus-visible,
.icon-btn:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--accent, var(--keys));
    outline-offset: 3px;
}

.pad:focus:not(:focus-visible) {
    outline: none;
}

/* ---------- Controls ---------- */
.controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

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

.icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.icon .stroke {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
}

.icon-btn,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 40px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
}

.icon-btn {
    width: 40px;
    padding: 0;
}

.btn {
    padding: 0 16px;
    font-size: 0.9rem;
    font-weight: 500;
}

.icon-btn:hover,
.btn:hover {
    background: var(--surface-3);
    border-color: rgba(255, 255, 255, 0.24);
}

.icon-btn:active,
.btn:active {
    transform: scale(0.96);
}

.btn .icon {
    width: 14px;
    height: 14px;
}

.icon--off { display: none; }
.icon-btn[aria-pressed="true"] .icon--on { display: none; }
.icon-btn[aria-pressed="true"] .icon--off { display: block; }
.icon-btn[aria-pressed="true"] {
    color: var(--drums);
    border-color: color-mix(in srgb, var(--drums) 50%, transparent);
}

/* Range slider */
.volume__slider {
    --fill: 80%;
    width: 160px;
    height: 20px;
    margin: 0;
    background: transparent;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.volume__slider::-webkit-slider-runnable-track {
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--keys) var(--fill), var(--surface-3) var(--fill));
}

.volume__slider::-moz-range-track {
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--keys) var(--fill), var(--surface-3) var(--fill));
}

.volume__slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    margin-top: -6px;
    border: none;
    border-radius: 50%;
    background: var(--text);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
    transition: transform 0.15s;
}

.volume__slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: none;
    border-radius: 50%;
    background: var(--text);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.volume__slider:hover::-webkit-slider-thumb { transform: scale(1.15); }

.volume__slider:focus-visible {
    outline: 2px solid var(--keys);
    outline-offset: 4px;
    border-radius: 4px;
}

body.is-muted .volume__slider::-webkit-slider-runnable-track {
    background: linear-gradient(90deg, var(--text-faint) var(--fill), var(--surface-3) var(--fill));
}

body.is-muted .volume__slider::-moz-range-track {
    background: linear-gradient(90deg, var(--text-faint) var(--fill), var(--surface-3) var(--fill));
}

.volume__value {
    min-width: 4.5ch;
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Legend */
.legend {
    display: flex;
    gap: 18px;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legend__item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legend__item::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--dot);
}

.legend__item--hats  { --dot: var(--keys); }
.legend__item--drums { --dot: var(--drums); }
.legend__item--chords { --dot: var(--loops); }

/* ---------- Footer ---------- */
.footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 24px;
    font-size: 0.85rem;
    color: var(--text-faint);
}

/* ================= Animations ================= */
@keyframes pad-hit {
    0%   { opacity: 0.55; }
    100% { opacity: 0; }
}

@keyframes led-pulse {
    50% { opacity: 0.45; }
}

@keyframes display-bump {
    0%   { transform: scale(0.88); }
    100% { transform: scale(1); }
}

@keyframes eq {
    0%   { height: 4px; }
    100% { height: 20px; }
}

/* ================= Responsive ================= */

/* Tablet: 3 × 3 grid of wider pads */
@media (max-width: 900px) {
    .beatbox {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .pad {
        min-height: 120px;
    }
}

@media (max-width: 640px) {
    .app {
        padding: 24px 16px;
        gap: 20px;
        justify-content: flex-start;
    }

    .hint {
        display: none;
    }

    .console {
        padding: 12px;
        gap: 14px;
        border-radius: 20px;
    }

    .display {
        padding: 12px 14px;
        gap: 12px;
    }

    .display__key {
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }

    .display__name {
        font-size: 1.1rem;
    }

    .display__type {
        font-size: 0.78rem;
    }

    .beatbox {
        gap: 8px;
    }

    .pad {
        min-height: 104px;
        padding: 12px 10px 14px;
        border-radius: 14px;
    }

    .pad::before {
        top: 11px;
        right: 11px;
    }

    .pad__key {
        font-size: 1.6rem;
    }

    .pad__name {
        font-size: 0.85rem;
    }

    .pad__type {
        font-size: 0.6rem;
    }

    .controls {
        gap: 12px;
    }

    .volume {
        flex: 1 1 100%;
    }

    .volume__slider {
        flex: 1;
        width: auto;
    }

    .legend {
        gap: 14px;
        font-size: 0.8rem;
    }

    /* Keyboard shortcuts aren't useful on phones */
    .footer {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}