:root {
    --bg: #090d1a;
    --panel: #101833;
    --panel-border: #3a4f88;
    --text: #e7eeff;
    --muted: #9fb2e2;
    --accent: #55f8d4;
    --accent-2: #ff58c8;
    --warn: #ffc857;
    --danger: #ff627b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 12% 8%, rgba(85, 248, 212, 0.12), transparent 32%),
        radial-gradient(circle at 86% 6%, rgba(255, 88, 200, 0.16), transparent 34%),
        linear-gradient(180deg, #070b16 0%, #0d1430 100%);
}

.app {
    max-width: 1180px;
    margin: 0 auto;
    padding: 1.4rem 1rem 2.1rem;
}

.back-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.back-link:hover {
    text-decoration: underline;
}

.hero {
    margin: 0.95rem 0 1.1rem;
}

.kicker {
    margin: 0;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.76rem;
}

h1 {
    margin: 0.35rem 0 0.4rem;
    font-size: clamp(1.75rem, 3.3vw, 2.6rem);
}

.subtitle {
    margin: 0;
    color: var(--muted);
    max-width: 66ch;
}

.layout {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(300px, 1.2fr) minmax(260px, 0.8fr);
}

.panel {
    background: linear-gradient(180deg, rgba(16, 24, 51, 0.96), rgba(11, 18, 37, 0.98));
    border: 1px solid var(--panel-border);
    border-radius: 14px;
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.35);
}

.stage-panel {
    padding: 0.8rem;
}

#stage {
    width: 100%;
    height: auto;
    border-radius: 10px;
    border: 1px solid #5066a8;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
    display: block;
    background: #0b1228;
}

.hint {
    margin: 0.7rem 0 0.1rem;
    color: var(--muted);
    font-size: 0.82rem;
}

.hud-panel {
    padding: 0.9rem;
    display: grid;
    gap: 0.75rem;
    align-content: start;
}

.score-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
}

.score-row > div {
    border: 1px solid rgba(108, 132, 204, 0.55);
    border-radius: 9px;
    background: rgba(17, 26, 53, 0.78);
    padding: 0.45rem 0.5rem;
    text-align: center;
}

.score-row.secondary > div {
    border-color: rgba(108, 132, 204, 0.4);
    background: rgba(14, 21, 45, 0.7);
}

.label {
    display: block;
    font-size: 0.68rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

strong {
    font-size: 1.2rem;
}

.meter-wrap {
    display: grid;
    gap: 0.35rem;
}

.meter-head {
    display: flex;
    justify-content: space-between;
    font-size: 0.76rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.meter {
    position: relative;
    height: 20px;
    border-radius: 999px;
    border: 1px solid #546aa9;
    background: linear-gradient(90deg, #17254d, #1b2d5d);
    overflow: hidden;
}

.meter-center {
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(50% - 1px);
    width: 2px;
    background: rgba(255, 255, 255, 0.45);
}

.power-zones {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg,
        rgba(255, 98, 123, 0.42) 0%,
        rgba(255, 200, 87, 0.45) 22%,
        rgba(85, 248, 212, 0.45) 45%,
        rgba(85, 248, 212, 0.45) 70%,
        rgba(255, 200, 87, 0.45) 82%,
        rgba(255, 98, 123, 0.42) 100%);
}

.meter-marker,
.meter-lock {
    position: absolute;
    top: -2px;
    width: 3px;
    height: 24px;
    border-radius: 2px;
    pointer-events: none;
}

.meter-marker {
    background: #f6fbff;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.meter-lock {
    background: var(--accent-2);
    opacity: 0;
    box-shadow: 0 0 0 1px rgba(255, 88, 200, 0.6);
}

.meter-lock.visible {
    opacity: 1;
}

.action {
    margin-top: 0.25rem;
    border: 1px solid #89ffd7;
    border-radius: 10px;
    background: linear-gradient(180deg, #32dcb3, #1ea082);
    color: #071412;
    font-weight: 800;
    letter-spacing: 0.02em;
    padding: 0.72rem 0.85rem;
    cursor: pointer;
    font-size: 0.95rem;
}

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

.message {
    margin: 0;
    min-height: 2.8em;
    color: #dce7ff;
    font-size: 0.88rem;
    line-height: 1.35;
}

@media (max-width: 920px) {
    .layout {
        grid-template-columns: 1fr;
    }
}