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

:root {
    --bg-primary: #070a11;
    --bg-secondary: #0d1320;
    --panel-bg: rgba(13, 19, 32, 0.82);
    --panel-strong: rgba(10, 15, 26, 0.95);
    --accent-cyan: #5cf6ff;
    --accent-blue: #6ea8ff;
    --accent-lime: #d7ff61;
    --accent-red: #ff5f7d;
    --accent-gold: #ffd45c;
    --text-primary: #eff8ff;
    --text-secondary: #9cb0c7;
    --text-dim: #6d8098;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

body {
    min-height: 100vh;
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(circle at 20% 20%, rgba(92, 246, 255, 0.14), transparent 24%),
        radial-gradient(circle at 82% 18%, rgba(110, 168, 255, 0.16), transparent 24%),
        radial-gradient(circle at 60% 80%, rgba(215, 255, 97, 0.08), transparent 22%),
        linear-gradient(180deg, #05070d 0%, #0b101a 52%, #06080e 100%);
    overflow-x: hidden;
}

.grid-bg {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(92, 246, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(92, 246, 255, 0.05) 1px, transparent 1px);
    background-size: 36px 36px;
    opacity: 0.2;
    pointer-events: none;
}

.glow {
    position: fixed;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
    opacity: 0.18;
}

.glow-left {
    top: 120px;
    left: -80px;
    background: var(--accent-cyan);
}

.glow-right {
    right: -100px;
    bottom: 80px;
    background: var(--accent-blue);
}

.back-link {
    position: fixed;
    top: 20px;
    left: 20px;
    color: #00f5d4;
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    padding: 10px 20px;
    border: 2px solid #00f5d4;
    background: rgba(0, 0, 0, 0.8);
    transition: all 0.3s;
    z-index: 1000;
}

.back-link:hover {
    background: #00f5d4;
    color: #0a0a0a;
    box-shadow: 0 0 20px rgba(0, 245, 212, 0.5);
}

.container {
    position: relative;
    z-index: 1;
    width: min(1400px, calc(100% - 32px));
    margin: 0 auto;
    padding: 84px 0 32px;
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: end;
    margin-bottom: 24px;
}

.eyebrow,
.section-kicker,
.status-label,
.hero-chip span {
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

.eyebrow,
.section-kicker {
    font-size: 12px;
    color: var(--accent-cyan);
}

.title {
    margin-top: 8px;
    font-size: clamp(2.8rem, 7vw, 5rem);
    line-height: 0.92;
    letter-spacing: -0.05em;
}

.subtitle {
    margin-top: 14px;
    max-width: 720px;
    color: var(--text-secondary);
    font-size: 1.03rem;
}

.hero-panel {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.hero-chip {
    min-width: 180px;
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(14, 24, 38, 0.92), rgba(11, 16, 26, 0.75));
    box-shadow: var(--shadow);
}

.hero-chip span {
    font-size: 11px;
    color: var(--text-dim);
}

.hero-chip strong {
    display: block;
    margin-top: 8px;
    font-size: 1.05rem;
}

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(290px, 360px);
    gap: 24px;
    align-items: start;
}

.game-shell,
.side-panel {
    border-radius: 24px;
    border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(11, 16, 26, 0.94), rgba(7, 10, 17, 0.88));
    box-shadow: var(--shadow);
}

.game-shell {
    padding: 22px;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
    flex-wrap: wrap;
}

.difficulty-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tab,
.reset-btn {
    border: 1px solid var(--border);
    cursor: pointer;
    font: inherit;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tab {
    padding: 11px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.tab.active {
    background: linear-gradient(135deg, rgba(92, 246, 255, 0.18), rgba(110, 168, 255, 0.18));
    border-color: rgba(92, 246, 255, 0.5);
}

.status-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.status-card {
    min-width: 110px;
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    text-align: center;
}

.status-label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
}

.status-card strong {
    display: block;
    margin-top: 6px;
    font-size: 1.5rem;
}

.reset-btn {
    padding: 13px 18px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-lime), #f3ff9b);
    color: #11151d;
    font-weight: 700;
}

.board-frame {
    margin-top: 18px;
    padding: 18px;
    border-radius: 22px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.02)),
        linear-gradient(180deg, rgba(13, 19, 32, 0.98), rgba(9, 13, 22, 0.88));
}

.board-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: end;
    margin-bottom: 18px;
}

.board-header h2,
.panel-block h2 {
    margin-top: 8px;
    font-size: 1.3rem;
    letter-spacing: -0.03em;
}

.board-hint {
    color: var(--text-secondary);
    font-size: 0.92rem;
    text-align: right;
}

.board-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 4px;
}

.board-scroll::-webkit-scrollbar {
    height: 8px;
}

.board-scroll::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 999px;
}

.board-scroll::-webkit-scrollbar-thumb {
    background: rgba(92, 246, 255, 0.25);
    border-radius: 999px;
}

.board {
    display: grid;
    gap: var(--cell-gap, 6px);
    justify-content: start;
    width: fit-content;
    padding: 12px;
    border-radius: 20px;
    background: rgba(4, 8, 15, 0.88);
    border: 1px solid rgba(92, 246, 255, 0.12);
}

.cell {
    width: var(--cell-size, 42px);
    height: var(--cell-size, 42px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    background:
        linear-gradient(180deg, rgba(92, 246, 255, 0.1), rgba(255, 255, 255, 0.03)),
        #101827;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    user-select: none;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.cell:hover {
    transform: translateY(-1px);
    border-color: rgba(92, 246, 255, 0.4);
}

.cell.revealed {
    cursor: default;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.08);
    transform: none;
}

.cell.flagged {
    color: var(--accent-gold);
}

.cell.mine {
    background: linear-gradient(135deg, rgba(255, 95, 125, 0.26), rgba(255, 255, 255, 0.04));
    border-color: rgba(255, 95, 125, 0.45);
}

.cell.exploded {
    background: linear-gradient(135deg, rgba(255, 95, 125, 0.8), rgba(255, 95, 125, 0.3));
    color: #fff;
}

.cell.n1 { color: #7bd7ff; }
.cell.n2 { color: #79ff9e; }
.cell.n3 { color: #ffd45c; }
.cell.n4 { color: #ff8ad1; }
.cell.n5 { color: #ff7e5c; }
.cell.n6 { color: #79fff2; }
.cell.n7 { color: #d2d8ff; }
.cell.n8 { color: #ffffff; }

.side-panel {
    padding: 20px;
    position: sticky;
    top: 22px;
}

.panel-block + .panel-block {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.info-list,
.telemetry,
.log-panel {
    margin-top: 16px;
}

.info-list {
    display: grid;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.telemetry {
    display: grid;
    gap: 12px;
}

.telemetry-item {
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.telemetry-item span {
    display: block;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.telemetry-item strong {
    display: block;
    margin-top: 8px;
    font-size: 1.3rem;
}

.log-panel {
    display: grid;
    gap: 10px;
}

.log-entry {
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
}

@media (max-width: 1180px) {
    .hero {
        display: block;
    }

    .hero-panel {
        margin-top: 18px;
        justify-content: flex-start;
    }

    .workspace {
        grid-template-columns: 1fr;
    }

    .side-panel {
        position: static;
    }
}

@media (max-width: 820px) {
    .container {
        width: min(100% - 20px, 1400px);
        padding-top: 78px;
    }

    .game-shell,
    .side-panel {
        padding: 16px;
    }

    .board-header,
    .toolbar {
        display: block;
    }

    .status-bar {
        margin-top: 14px;
    }

    .board-hint {
        margin-top: 12px;
        text-align: left;
    }

    .board-scroll {
        margin-right: -2px;
    }

    .cell {
        border-radius: 10px;
        font-size: 1rem;
    }
}