:root {
    --bg: #0b0f17;
    --card: #11182a;
    --card2: #0f1526;
    --text: #e8eefc;
    --muted: #a9b6d6;
    --border: rgba(255, 255, 255, 0.08);
    --accent: #5eead4;
    --accent2: #60a5fa;
    --danger: #fb7185;
    --good: #34d399;
    --shadow: 0 12px 35px rgba(0, 0, 0, 0.45);
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: radial-gradient(1200px 700px at 20% 10%, rgba(96, 165, 250, 0.18), transparent 55%),
                radial-gradient(1200px 700px at 90% 30%, rgba(94, 234, 212, 0.12), transparent 55%),
                var(--bg);
    color: var(--text);
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.topbar {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    background: rgba(10, 14, 23, 0.6);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 5;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 99px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: 0 0 0 6px rgba(96, 165, 250, 0.12);
}

.title {
    font-weight: 800;
    letter-spacing: 0.3px;
}

.subtitle {
    font-size: 12px;
    color: var(--muted);
    margin-top: 2px;
}

.hud {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.hud-item {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px 10px;
    min-width: 92px;
}

.hud-item .label {
    font-size: 11px;
    color: var(--muted);
}

.hud-item .value {
    font-size: 14px;
    font-weight: 800;
    margin-top: 2px;
}

.wrap {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 16px;
    padding: 16px;
    max-width: 1500px;
    margin: 0 auto;
}

@media (max-width: 1100px) {
    .wrap {
        grid-template-columns: 1fr;
    }
}

.game-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 14px;
}

canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: #070b12;
}

.hint-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.hint {
    font-size: 12px;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 10px;
}

.kbd {
    font-weight: 800;
    color: var(--text);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    padding: 2px 6px;
    margin-right: 6px;
}

.side .panel {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 14px;
    position: sticky;
    top: 68px;
}

.panel-title {
    font-weight: 900;
    margin: 0 0 8px 0;
}

.panel-sub {
    color: var(--muted);
    font-size: 12.5px;
    line-height: 1.4;
}

.divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    margin: 12px 0;
}

.shop {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.shop-item {
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 14px;
    padding: 10px;
}

.shop-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

.shop-name {
    font-weight: 900;
}

.shop-meta {
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px;
    line-height: 1.35;
}

.pill {
    font-size: 11px;
    border-radius: 999px;
    padding: 4px 8px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    white-space: nowrap;
}

.pill.good {
    border-color: rgba(52, 211, 153, 0.35);
    background: rgba(52, 211, 153, 0.12);
}

.pill.bad {
    border-color: rgba(251, 113, 133, 0.35);
    background: rgba(251, 113, 133, 0.12);
}

.shop-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.btn {
    appearance: none;
    border: 1px solid rgba(94, 234, 212, 0.35);
    background: linear-gradient(135deg, rgba(94, 234, 212, 0.20), rgba(96, 165, 250, 0.14));
    color: var(--text);
    padding: 10px 12px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 900;
    transition: transform 0.06s ease, filter 0.2s ease;
    width: 100%;
}

.btn:hover {
    filter: brightness(1.06);
}

.btn:active {
    transform: translateY(1px);
}

.btn.secondary {
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
}

.btn[disabled] {
    cursor: not-allowed;
    opacity: 0.55;
}

.status {
    display: grid;
    gap: 8px;
}

.status-row {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
}

.status-label {
    color: var(--muted);
}

.status-value {
    font-weight: 900;
}

/* Difficulty UI */
.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
    margin-top: 10px;
}

.form-row label {
    font-size: 12px;
    color: var(--muted);
    font-weight: 800;
    letter-spacing: 0.2px;
}

.select {
    width: 100%;
    padding: 10px 10px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    outline: none;
    font-weight: 800;
}

.range {
    width: 100%;
}

.mini {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.78);
    font-weight: 900;
}

.custom-diff {
    margin-top: 8px;
    padding: 10px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.10);
    background: rgba(255, 255, 255, 0.03);
}

.hidden {
    display: none;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
    z-index: 50;
}

.overlay.hidden {
    display: none;
}

.overlay-card {
    width: min(520px, 100%);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 16px;
}

.overlay-title {
    font-size: 20px;
    font-weight: 950;
}

.overlay-text {
    margin-top: 8px;
    color: var(--muted);
    line-height: 1.4;
}

.overlay-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 14px;
}