:root {
    --bg: #06060e;
    --panel: #0f1733;
    --line: #415a9d;
    --text: #eaf1ff;
    --muted: #a0b6eb;
    --cyan: #5fe6ff;
    --magenta: #ff6ebe;
    --green: #7dffb0;
    --warn: #ffd56a;
    --bad: #ff7d8f;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    padding: 1rem;
    display: flex;
    justify-content: center;
    color: var(--text);
    font-family: "Inter", "Segoe UI", system-ui, sans-serif;
    background:
        radial-gradient(circle at 12% 9%, rgba(95, 230, 255, 0.2), transparent 35%),
        radial-gradient(circle at 86% 12%, rgba(255, 110, 190, 0.2), transparent 38%),
        linear-gradient(168deg, #04050b 0%, #0a1230 55%, #05070f 100%);
}

.app {
    width: min(1020px, 100%);
    display: grid;
    gap: 0.85rem;
}

.panel {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(16, 25, 52, 0.97), rgba(8, 12, 24, 0.95));
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.36);
}

.topbar {
    padding: 0.95rem 1rem;
}

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

h1 {
    margin: 0.52rem 0 0.32rem;
    font-size: clamp(1.45rem, 3.4vw, 2.12rem);
}

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

.stats {
    padding: 0.76rem;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0.5rem;
}

.stats > div {
    border: 1px solid #4a63a8;
    border-radius: 10px;
    background: rgba(19, 30, 67, 0.73);
    padding: 0.44rem 0.58rem;
}

.k {
    display: block;
    color: var(--muted);
    font-size: 0.71rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.stats strong {
    font-size: 1.02rem;
}

.stage {
    padding: 0.78rem;
    display: grid;
    gap: 0.56rem;
}

#track {
    width: 100%;
    border: 1px solid #506ab2;
    border-radius: 12px;
    background: linear-gradient(180deg, #0b1330, #050810 70%, #04060b);
}

.hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
}

.controls {
    padding: 0.78rem;
    display: grid;
    gap: 0.65rem;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.48rem;
}

button {
    border: 1px solid #5b74c5;
    border-radius: 10px;
    background: #1a2f67;
    color: var(--text);
    font-weight: 700;
    padding: 0.56rem 0.8rem;
    cursor: pointer;
}

button:hover {
    border-color: #96dbff;
}

.primary {
    background: linear-gradient(180deg, #10c5ff, #116cdf);
    border-color: #7ce2ff;
}

.message {
    margin: 0;
    border: 1px solid #4a5f9f;
    border-radius: 10px;
    min-height: 2.4rem;
    padding: 0.52rem 0.62rem;
    background: rgba(16, 25, 58, 0.72);
    color: #d7e4ff;
}

.message.good { color: var(--green); }
.message.warn { color: var(--warn); }
.message.bad { color: var(--bad); }

@media (max-width: 880px) {
    .stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 520px) {
    .stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}