@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600&family=Manrope:wght@400;500;600;700&display=swap');

:root {
    --bg-base: #0f1218;
    --bg-deep: #090b10;
    --panel: #1a1e25;
    --panel-soft: #242932;
    --panel-border: #414754;
    --metal-light: #676d79;
    --metal-dark: #16191f;
    --gold: #cdb382;
    --gold-bright: #f1d6a2;
    --white-key-top: #f6f3ec;
    --white-key-bottom: #dfdad0;
    --black-key-top: #2d313a;
    --black-key-bottom: #090b0f;
    --white-key-width: 52px;
    --white-key-gap: 2px;
    --black-key-width: 34px;
}

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

body {
    font-family: 'Manrope', 'Trebuchet MS', sans-serif;
    background:
        radial-gradient(circle at 15% 10%, rgba(94, 117, 155, 0.18), transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(151, 107, 67, 0.16), transparent 36%),
        linear-gradient(155deg, var(--bg-base) 0%, #131722 42%, var(--bg-deep) 100%);
    color: #e5dcc9;
    min-height: 100vh;
    padding: clamp(18px, 3vw, 42px);
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.24;
    background:
        repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 5px),
        repeating-linear-gradient(30deg, rgba(0, 0, 0, 0.2) 0 1px, transparent 1px 6px);
}

.stage {
    width: min(1280px, 100%);
    margin: 0 auto;
    display: grid;
    gap: clamp(16px, 2vw, 28px);
    animation: stage-rise 420ms ease-out;
}

.hero {
    display: flex;
    justify-content: center;
}

.title-row {
    display: inline-flex;
    align-items: center;
    gap: clamp(16px, 2vw, 28px);
}

.title-row h1 {
    font-family: 'Cinzel', Georgia, serif;
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: none;
    color: #d6cab0;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.title-line {
    width: clamp(46px, 8vw, 84px);
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent 0%, #a99876 55%, transparent 100%);
}

.instrument-shell {
    position: relative;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 22px;
    background:
        linear-gradient(180deg, rgba(105, 112, 126, 0.42), rgba(33, 37, 46, 0.92) 18%, rgba(14, 16, 22, 0.96) 100%);
    border: 1px solid rgba(255, 255, 255, 0.09);
    padding: clamp(16px, 2.4vw, 30px) clamp(20px, 2.6vw, 34px);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        inset 0 -8px 18px rgba(0, 0, 0, 0.35),
        0 22px 36px rgba(0, 0, 0, 0.45);
    animation: stage-rise 520ms ease-out;
}

.instrument-shell::before,
.instrument-shell::after {
    content: '';
    position: absolute;
    top: 14px;
    bottom: 14px;
    width: clamp(18px, 2.5vw, 34px);
    border-radius: 8px;
    background: linear-gradient(90deg, #50301b 0%, #9f7043 34%, #c7925f 56%, #6f4221 100%);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.instrument-shell::before {
    left: clamp(4px, 0.5vw, 8px);
}

.instrument-shell::after {
    right: clamp(4px, 0.5vw, 8px);
}

.instrument-rail {
    height: clamp(18px, 2.8vw, 30px);
    margin: 0 clamp(18px, 4vw, 50px) clamp(8px, 1vw, 12px);
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(146, 149, 157, 0.55) 0%, rgba(58, 61, 69, 0.82) 45%, rgba(26, 28, 33, 0.95) 100%);
    border: 1px solid rgba(255, 255, 255, 0.11);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        inset 0 -4px 8px rgba(0, 0, 0, 0.45);
}

.piano-keyboard {
    position: relative;
    border-radius: 14px;
    padding: clamp(10px, 1.5vw, 18px) clamp(10px, 1.8vw, 20px) clamp(14px, 2.1vw, 24px);
    background:
        linear-gradient(180deg, #2b3039 0%, #11141a 36%, #0d1016 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        inset 0 -8px 14px rgba(0, 0, 0, 0.55);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: #4d5160 #13161d;
}

.piano-keyboard::-webkit-scrollbar {
    height: 8px;
}

.piano-keyboard::-webkit-scrollbar-track {
    background: #12161e;
    border-radius: 999px;
}

.piano-keyboard::-webkit-scrollbar-thumb {
    background: #4a4f5b;
    border-radius: 999px;
}

.keys-container {
    position: relative;
    display: flex;
    width: max-content;
    margin: 0 auto;
    height: 232px;
    padding: 0;
    align-items: flex-start;
}

.key {
    position: relative;
    cursor: pointer;
    user-select: none;
    transition: transform 70ms ease, box-shadow 90ms ease, filter 90ms ease;
}

.key.white {
    width: var(--white-key-width);
    height: 208px;
    background: linear-gradient(180deg, var(--white-key-top) 0%, #ece7dc 38%, var(--white-key-bottom) 100%);
    border: 1px solid #1d2129;
    border-radius: 0 0 8px 8px;
    margin: 0 var(--white-key-gap);
    box-shadow:
        inset 0 -7px 10px rgba(0, 0, 0, 0.14),
        inset 0 2px 4px rgba(255, 255, 255, 0.72),
        0 5px 10px rgba(0, 0, 0, 0.44);
}

.key.white::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.22) 0%, transparent 18%, transparent 80%, rgba(0, 0, 0, 0.1) 100%);
    pointer-events: none;
}

.key.white.active {
    transform: translateY(3px);
    filter: brightness(0.92);
    box-shadow:
        inset 0 -4px 7px rgba(0, 0, 0, 0.16),
        0 2px 4px rgba(0, 0, 0, 0.4);
}

.key.white.latched {
    box-shadow:
        inset 0 -6px 9px rgba(0, 0, 0, 0.16),
        inset 0 2px 4px rgba(255, 255, 255, 0.7),
        0 0 0 1px rgba(222, 189, 126, 0.55),
        0 0 10px rgba(222, 189, 126, 0.3);
}

.key.black {
    width: var(--black-key-width);
    height: 128px;
    border: 1px solid #06070a;
    border-radius: 0 0 7px 7px;
    background: linear-gradient(180deg, #313846 0%, #151a23 46%, #080b11 100%);
    position: absolute;
    top: 0;
    z-index: 3;
    box-shadow:
        inset 0 1px 2px rgba(255, 255, 255, 0.14),
        inset 0 -8px 12px rgba(0, 0, 0, 0.58),
        0 7px 10px rgba(0, 0, 0, 0.65);
}

.key.black.active {
    transform: translateY(3px);
    filter: brightness(0.86);
    box-shadow:
        inset 0 1px 2px rgba(255, 255, 255, 0.08),
        0 3px 5px rgba(0, 0, 0, 0.58);
}

.key.black.latched {
    box-shadow:
        inset 0 1px 2px rgba(255, 255, 255, 0.08),
        0 0 0 1px rgba(222, 189, 126, 0.6),
        0 0 12px rgba(222, 189, 126, 0.34);
}

.key-label {
    position: absolute;
    bottom: 9px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.71rem;
    letter-spacing: 0.04em;
    color: rgba(81, 88, 101, 0.86);
    font-weight: 700;
    pointer-events: none;
}

.key.black .key-label {
    color: rgba(214, 209, 199, 0.72);
}

.status {
    margin: 0 auto;
    width: min(680px, 100%);
    text-align: center;
    color: #d8d3c6;
    font-size: 0.95rem;
    border-radius: 12px;
    padding: 10px 14px;
    background: linear-gradient(180deg, rgba(56, 61, 72, 0.5) 0%, rgba(26, 30, 38, 0.85) 100%);
    border: 1px solid rgba(255, 255, 255, 0.07);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.09);
    animation: stage-rise 620ms ease-out;
}

.control-deck {
    display: grid;
    grid-template-columns: repeat(4, minmax(160px, 1fr));
    gap: clamp(14px, 2vw, 24px);
}

.control-card {
    border-radius: 16px;
    padding: clamp(14px, 2vw, 20px);
    background: linear-gradient(180deg, rgba(44, 50, 61, 0.86), rgba(20, 24, 31, 0.94));
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.12),
        0 10px 18px rgba(0, 0, 0, 0.35);
    display: grid;
    gap: 14px;
    animation: stage-rise 700ms ease-out;
}

.control-card:nth-child(2) {
    animation-delay: 90ms;
}

.control-card:nth-child(3) {
    animation-delay: 150ms;
}

.control-card:nth-child(4) {
    animation-delay: 210ms;
}

.control-card h2 {
    font-family: 'Cinzel', Georgia, serif;
    font-size: clamp(1.1rem, 2vw, 1.45rem);
    font-weight: 600;
    letter-spacing: 0.03em;
    color: #ded4be;
    text-align: center;
}

.damper-toggle,
.rocker-toggle {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: #e5dcc6;
}

.damper-toggle {
    padding: 12px 10px;
    font-size: 1.6rem;
    background:
        linear-gradient(180deg, #2a2f3a 0%, #1a1f28 45%, #0b0e13 100%);
    box-shadow:
        inset 0 2px 0 rgba(255, 255, 255, 0.16),
        inset 0 -8px 10px rgba(0, 0, 0, 0.58);
    color: #a9b2c1;
    transition: color 100ms ease, box-shadow 100ms ease, text-shadow 100ms ease;
}

.damper-toggle.active {
    color: var(--gold-bright);
    text-shadow: 0 0 8px rgba(241, 214, 162, 0.35);
    box-shadow:
        inset 0 2px 0 rgba(255, 255, 255, 0.18),
        inset 0 -8px 12px rgba(0, 0, 0, 0.58),
        0 0 0 1px rgba(221, 190, 134, 0.4);
}

.rocker-toggle {
    position: relative;
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 10px 16px;
    font-size: 1.45rem;
    background: linear-gradient(180deg, #161a21 0%, #090b10 100%);
    overflow: hidden;
}

.rocker-cap {
    width: clamp(72px, 8vw, 118px);
    height: 24px;
    border-radius: 999px;
    background:
        linear-gradient(180deg, #d5d8dc 0%, #a8afb8 44%, #6f7580 60%, #3b414b 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.65),
        inset 0 -3px 4px rgba(0, 0, 0, 0.3),
        0 3px 8px rgba(0, 0, 0, 0.42);
    transform: translateY(-1px);
    transition: transform 110ms ease, box-shadow 120ms ease;
}

.rocker-toggle.active {
    color: var(--gold-bright);
    text-shadow: 0 0 8px rgba(241, 214, 162, 0.4);
}

.rocker-toggle.active .rocker-cap {
    transform: translateY(1px);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.55),
        inset 0 -3px 4px rgba(0, 0, 0, 0.34),
        0 0 14px rgba(229, 188, 111, 0.45);
}

.slider-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    align-items: center;
    color: #d7ccb5;
    font-size: 0.94rem;
    font-weight: 600;
}

.sustain-slider {
    appearance: none;
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(222, 189, 126, 0.9) 0%, rgba(222, 189, 126, 0.42) 50%, rgba(31, 34, 41, 0.85) 50%, rgba(31, 34, 41, 0.85) 100%);
    outline: none;
}

.sustain-slider::-webkit-slider-runnable-track {
    height: 8px;
    border-radius: 999px;
    background: transparent;
}

.sustain-slider::-moz-range-track {
    height: 8px;
    border-radius: 999px;
    background: rgba(31, 34, 41, 0.85);
}

.sustain-slider::-webkit-slider-thumb {
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    margin-top: -7px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: linear-gradient(180deg, #f2d9aa 0%, #b88d47 62%, #6a4e22 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.5),
        0 4px 8px rgba(0, 0, 0, 0.42);
    cursor: pointer;
}

.sustain-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: linear-gradient(180deg, #f2d9aa 0%, #b88d47 62%, #6a4e22 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.5),
        0 4px 8px rgba(0, 0, 0, 0.42);
    cursor: pointer;
}

.slider-value {
    text-align: center;
    font-size: 1.85rem;
    font-weight: 700;
    color: #f2dfba;
    text-shadow: 0 0 9px rgba(241, 214, 162, 0.28);
}

.coupling-select {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 12px;
    padding: 10px 12px;
    font: inherit;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #eadfca;
    background: linear-gradient(180deg, #222834 0%, #10141b 100%);
}

.control-hint {
    color: #c8bda7;
    font-size: 0.84rem;
    line-height: 1.4;
    text-align: center;
}

.footer {
    text-align: center;
    color: #b8b09d;
    font-size: 0.95rem;
    padding-bottom: 8px;
}

.footer a {
    color: #d5c9b1;
    text-decoration: none;
    border-bottom: 1px solid rgba(213, 201, 177, 0.5);
    transition: color 140ms ease, border-color 140ms ease;
}

.footer a:hover {
    color: #efe2c8;
    border-bottom-color: #efe2c8;
}

@keyframes stage-rise {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 980px) {
    .control-deck {
        grid-template-columns: 1fr;
    }

    .stage {
        gap: 16px;
    }

    .keys-container {
        height: 208px;
    }

    .key.white {
        height: 184px;
    }

    .key.black {
        height: 116px;
    }
}