.game-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 500px;
    width: 100%;
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
}

.status {
    font-size: 18px;
    font-weight: bold;
    padding: 6px 12px;
    border-radius: 6px;
}

.status.red-turn {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid #e74c3c;
}

.status.black-turn {
    color: #34495e;
    background: rgba(52, 73, 94, 0.1);
    border: 1px solid #34495e;
}

.timer {
    font-size: 14px;
    color: #7f8c8d;
}

.board {
    width: min(450px, 100vw - 40px);
    height: calc(min(450px, 100vw - 40px) * 10/9);
    background: linear-gradient(135deg, #d6ba88 0%, #c9a66b 100%);
    position: relative;
    margin: 0 auto;
    border: 3px solid #8b5a2b;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.river {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: calc(10% - 1px);
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #8b5a2b;
    font-size: 16px;
    font-weight: bold;
    z-index: 5;
}

.grid-line {
    position: absolute;
    background-color: #8b5a2b;
    z-index: 1;
}

.horizontal {
    width: calc(100% - 40px);
    height: 1px;
    left: 20px;
}

.vertical {
    width: 1px;
    height: 100%;
    top: 0;
}

.move-hint {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 235, 59, 0.7);
    z-index: 8;
    transform: translate(-50%, -50%);
    display: none;
}

.controls {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background-color: #e74c3c;
    color: white;
}

.btn-secondary {
    background-color: #3498db;
    color: white;
}

.thinking {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 16px;
    display: none;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.win-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}