:root {
    --bg: #04070f;
    --panel: #0d1730;
    --line: #2e4a85;
    --ink: #eaf2ff;
    --muted: #9eb2de;
    --cyan: #3df4ff;
    --pink: #ff61d8;
    --amber: #ffc86f;
    --good: #7cffad;
    --bad: #ff6a93;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Inter", "Segoe UI", system-ui, sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 8%, rgba(61, 244, 255, 0.15), transparent 46%),
        radial-gradient(circle at 82% 12%, rgba(255, 97, 216, 0.14), transparent 44%),
        linear-gradient(170deg, #04060c, #04070f 46%, #03050a);
    display: flex;
    justify-content: center;
    padding: 1rem;
}

.app {
    width: min(1100px, 100%);
    display: grid;
    gap: 0.95rem;
}

.panel {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(13, 23, 48, 0.96), rgba(7, 12, 26, 0.96));
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
}

.topbar {
    padding: 1rem;
}

.back {
    color: var(--amber);
    text-decoration: none;
    font-weight: 700;
}

h1 {
    margin: 0.62rem 0 0.35rem;
    font-size: clamp(1.35rem, 3vw, 2rem);
}

.topbar p {
    margin: 0;
    color: var(--muted);
}

.controls {
    padding: 0.8rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(110px, 1fr));
    gap: 0.58rem;
}

button {
    border: 1px solid #3a58a0;
    border-radius: 8px;
    background: #12224c;
    color: var(--ink);
    padding: 0.5rem 0.7rem;
    font-size: 0.9rem;
    font-weight: 650;
    cursor: pointer;
    transition: transform 120ms ease, border-color 120ms ease;
}

button:hover {
    transform: translateY(-1px);
    border-color: #6a8ae0;
}

button:active { transform: translateY(1px); }

button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

button.accent {
    border-color: #9a5be9;
    background: linear-gradient(180deg, #7042be, #512b8f);
}

.coin-picker {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, minmax(90px, 120px));
    gap: 0.5rem;
    justify-content: start;
}

.coin {
    border-color: #4d6bbb;
    background: #0f1e45;
}

.coin.active {
    border-color: var(--amber);
    background: linear-gradient(180deg, #7a5d24, #5f4616);
}

.meters {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(6, minmax(110px, 1fr));
    gap: 0.55rem;
}

.meters div {
    border: 1px solid #2a437f;
    border-radius: 9px;
    padding: 0.42rem 0.58rem;
    background: rgba(4, 8, 18, 0.76);
    display: grid;
    gap: 0.1rem;
}

.meters span {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    font-size: 0.7rem;
}

.meters strong {
    font-size: 0.98rem;
}

.board-wrap {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 235px;
    gap: 0.85rem;
    padding: 0.85rem;
}

canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    border: 1px solid #294984;
    background: #04070f;
    image-rendering: pixelated;
    touch-action: none;
}

.scanlines {
    position: absolute;
    inset: 0.85rem 235px 0.85rem 0.85rem;
    border-radius: 10px;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.055) 0,
        rgba(255, 255, 255, 0.055) 1px,
        transparent 1px,
        transparent 4px
    );
    mix-blend-mode: soft-light;
}

.legend {
    border: 1px solid #29447d;
    border-radius: 10px;
    background: rgba(6, 10, 23, 0.82);
    padding: 0.7rem;
    display: grid;
    align-content: start;
    gap: 0.5rem;
}

.legend h2 {
    margin: 0;
    font-size: 0.92rem;
}

.legend ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.35rem;
    font-size: 0.83rem;
}

.legend li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid #263b6d;
    border-radius: 7px;
    padding: 0.28rem 0.42rem;
}

.legend .lane {
    display: inline-flex;
    align-items: center;
    gap: 0.34rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1px solid #5e7ac0;
}

#status {
    margin: 0.2rem 0 0;
    color: var(--muted);
    line-height: 1.45;
    font-size: 0.86rem;
}

#status.good { color: var(--good); }
#status.bad { color: var(--bad); }

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

    .scanlines {
        inset: 0.85rem;
    }
}

@media (max-width: 760px) {
    .controls {
        grid-template-columns: repeat(2, minmax(120px, 1fr));
    }

    .meters {
        grid-template-columns: repeat(2, minmax(120px, 1fr));
    }

    .coin-picker {
        grid-template-columns: repeat(3, minmax(80px, 1fr));
    }
}