* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f4f4;
    color: #222;
}

.page {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.topbar h1 {
    margin: 0;
    font-size: 32px;
}

.player-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    color: #555;
}

.layout {
    display: grid;
    grid-template-columns: 1.7fr 0.9fr;
    gap: 24px;
}

.game-panel,
.leaderboard-panel {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 16px;
    padding: 20px;
}

.game-head {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.score-box {
    background: #fafafa;
    border: 1px solid #e3e3e3;
    border-radius: 12px;
    padding: 12px 16px;
    min-width: 140px;
}

.score-box span {
    display: block;
    color: #777;
    font-size: 14px;
    margin-bottom: 6px;
}

.score-box strong {
    font-size: 24px;
}

.game-wrap {
    position: relative;
    border: 1px solid #ddd;
    border-radius: 16px;
    overflow: hidden;
    background: linear-gradient(#fafafa, #f1f1f1);
}

canvas {
    width: 100%;
    display: block;
    background: linear-gradient(to bottom, #fdfdfd 0%, #f5f5f5 100%);
}

.overlay {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.85);
    padding: 24px;
}

.overlay.visible {
    display: flex;
}

.overlay-card {
    width: 100%;
    max-width: 420px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

.overlay-card h2 {
    margin-top: 0;
}

.overlay-card input {
    width: 100%;
    margin-top: 8px;
    margin-bottom: 14px;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 10px;
    font-size: 16px;
}

.overlay-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

button {
    border: 0;
    background: #222;
    color: #fff;
    padding: 12px 16px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 15px;
}

button:hover {
    background: #000;
}

.help {
    margin-top: 14px;
    color: #666;
    font-size: 14px;
}

.leaderboard-panel h2 {
    margin-top: 0;
}

.leaderboard-card {
    border: 1px solid #e3e3e3;
    border-radius: 12px;
    overflow: hidden;
    background: #fafafa;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: #f0f0f0;
}

th,
td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid #e6e6e6;
}

tbody tr:last-child td {
    border-bottom: 0;
}

.save-message {
    min-height: 24px;
    margin-top: 14px;
    color: #444;
}

@media (max-width: 980px) {
    .layout {
        grid-template-columns: 1fr;
    }
}