:root {
    --bg-top: #08131b;
    --bg-bottom: #102636;
    --panel: rgba(6, 14, 22, 0.72);
    --panel-border: rgba(180, 227, 255, 0.18);
    --text: #eff9ff;
    --muted: #9ec2d4;
    --accent: #8df5d2;
    --accent-strong: #ffb86b;
    --bonus: #ffd166;
    --danger: #ff6d7e;
    --grid: rgba(141, 245, 210, 0.08);
    --shadow: 0 24px 60px rgba(2, 8, 13, 0.45);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI Variable", "Bahnschrift", "Trebuchet MS", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(141, 245, 210, 0.12), transparent 34%),
        radial-gradient(circle at bottom right, rgba(255, 184, 107, 0.18), transparent 30%),
        linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, transparent 0, transparent 39px, var(--grid) 40px),
        linear-gradient(to bottom, transparent 0, transparent 39px, var(--grid) 40px);
    background-size: 40px 40px;
    opacity: 0.35;
}

.hidden {
    display: none;
}

.app-shell {
    position: relative;
    display: grid;
    grid-template-columns: minmax(280px, 420px) minmax(360px, 720px);
    gap: 32px;
    align-items: center;
    min-height: 100vh;
    padding: 32px;
}

.hero-panel,
.panel-frame {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
}

.hero-panel {
    padding: 36px;
}

.eyebrow {
    margin: 0 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--accent);
    font-size: 0.78rem;
}

h1 {
    margin: 0;
    font-size: clamp(2.2rem, 5.8vw, 4rem);
    line-height: 0.95;
}

.intro {
    margin: 18px 0 0;
    max-width: 34ch;
    line-height: 1.55;
    color: var(--muted);
    font-size: 1.06rem;
}

.rule-note {
    margin: 18px 0 0;
    padding: 14px 16px;
    max-width: 34ch;
    border-left: 3px solid rgba(255, 209, 102, 0.9);
    background: rgba(255, 209, 102, 0.08);
    color: #fbe7b0;
    line-height: 1.45;
}

.control-card {
    margin-top: 32px;
    padding: 22px;
    background: rgba(8, 20, 31, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
}

.control-card h2 {
    margin: 0 0 16px;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-strong);
}

.control-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.control-card li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
}

.game-panel {
    display: flex;
    justify-content: center;
}

.panel-frame {
    width: min(100%, 720px);
    padding: 24px;
}

.score-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}

.score-strip > div,
.mini-panel {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
}

.score-strip > div {
    padding: 14px 16px;
}

.label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
}

.score-strip strong {
    display: block;
    margin-top: 8px;
    font-size: 1.5rem;
}

.game-layout {
    display: grid;
    grid-template-columns: 140px minmax(260px, 1fr) 140px;
    gap: 18px;
    align-items: start;
}

.mini-panel {
    padding: 16px;
    text-align: center;
}

.mini-panel canvas {
    margin-top: 12px;
    width: 100%;
    height: auto;
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
}

.board-wrap {
    position: relative;
    padding: 10px;
    overflow: hidden;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(20, 39, 53, 0.96), rgba(7, 17, 26, 0.96));
    border: 1px solid rgba(180, 227, 255, 0.12);
}

#gameCanvas {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(7, 17, 26, 0.98), rgba(4, 9, 15, 0.98));
    touch-action: none;
}

.overlay {
    position: absolute;
    inset: 10px;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 24px;
    border-radius: 18px;
    background: rgba(3, 8, 12, 0.78);
}

.overlay.hidden {
    display: none;
}

.overlay h2 {
    margin: 0 0 10px;
    font-size: 2rem;
}

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

.bonus-burst {
    position: absolute;
    left: 50%;
    top: 22px;
    z-index: 3;
    padding: 10px 16px;
    border: 1px solid rgba(255, 209, 102, 0.4);
    border-radius: 999px;
    background: rgba(255, 209, 102, 0.16);
    color: #fff6d8;
    font-size: 0.86rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transform: translate(-50%, -10px);
    opacity: 0;
    box-shadow: 0 10px 30px rgba(255, 209, 102, 0.25);
    pointer-events: none;
}

.bonus-burst.visible {
    animation: burst-pop 900ms ease forwards;
}

.footer-bar {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

#statusText {
    margin: 0;
    color: var(--muted);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 12px;
}

.touch-controls {
    display: none;
    margin-top: 18px;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.04);
    gap: 12px;
}

.touch-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.4;
}

.touch-row {
    display: grid;
    gap: 12px;
}

.touch-row-top {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.touch-row-bottom {
    grid-template-columns: 1fr 1fr 1fr 1.2fr;
}

.touch-button {
    min-height: 56px;
    padding: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
}

.touch-button-rotate {
    background: linear-gradient(135deg, rgba(255, 184, 107, 0.92), rgba(255, 228, 121, 0.92));
}

.touch-button-side {
    background: rgba(255, 255, 255, 0.09);
    color: var(--text);
    box-shadow: none;
}

.touch-button-move {
    background: linear-gradient(135deg, rgba(99, 230, 255, 0.9), rgba(141, 245, 210, 0.95));
}

.touch-button-drop {
    background: linear-gradient(135deg, rgba(141, 245, 210, 0.95), rgba(244, 246, 165, 0.95));
}

.touch-button-hard {
    background: linear-gradient(135deg, rgba(210, 140, 255, 0.92), rgba(255, 119, 140, 0.92));
}

button {
    appearance: none;
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    font: inherit;
    color: #041018;
    background: linear-gradient(135deg, var(--accent), #f4f6a5);
    cursor: pointer;
    transition: transform 140ms ease, box-shadow 140ms ease;
    box-shadow: 0 10px 24px rgba(141, 245, 210, 0.26);
}

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

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

.secondary-button {
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: none;
}

.secondary-button.is-on {
    color: #041018;
    background: linear-gradient(135deg, var(--bonus), #fff1a6);
    box-shadow: 0 10px 24px rgba(255, 209, 102, 0.22);
}

@keyframes burst-pop {
    0% {
        opacity: 0;
        transform: translate(-50%, -16px) scale(0.9);
    }

    20% {
        opacity: 1;
        transform: translate(-50%, 0) scale(1);
    }

    70% {
        opacity: 1;
        transform: translate(-50%, 6px) scale(1.04);
    }

    100% {
        opacity: 0;
        transform: translate(-50%, -10px) scale(0.98);
    }
}

@media (max-width: 1080px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .intro {
        max-width: none;
    }
}

@media (max-width: 760px) {
    .app-shell {
        padding: 18px;
        gap: 18px;
    }

    .hero-panel,
    .panel-frame {
        border-radius: 22px;
    }

    .hero-panel {
        padding: 24px;
    }

    .panel-frame {
        padding: 16px;
    }

    .game-layout {
        grid-template-columns: 1fr;
    }

    .mini-panel {
        display: grid;
        grid-template-columns: 1fr auto;
        align-items: center;
        gap: 12px;
        text-align: left;
    }

    .mini-panel canvas {
        margin-top: 0;
        width: 84px;
    }

    .footer-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .button-row {
        justify-content: stretch;
    }

    .button-row button {
        width: 100%;
    }

    .touch-controls {
        display: grid;
        padding: 18px;
    }

    .touch-button {
        min-height: 68px;
        padding: 14px;
        font-size: 1.25rem;
    }

    .touch-button-hard,
    .touch-button-side {
        font-size: 1rem;
    }
}

@media (max-width: 420px) {
    .touch-row-top,
    .touch-row-bottom {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .touch-button {
        min-height: 76px;
        font-size: 1.3rem;
    }

    .touch-button-hard,
    .touch-button-side {
        font-size: 1.05rem;
    }
}