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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 900px;
    width: 90%;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.game-info {
    text-align: center;
    margin-bottom: 20px;
    color: #666;
}

.game-info p {
    margin: 5px 0;
    font-size: 14px;
}

.game-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.difficulty {
    display: flex;
    align-items: center;
    gap: 10px;
}

.difficulty label {
    font-weight: bold;
    color: #333;
}

.difficulty select {
    padding: 8px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.difficulty button {
    padding: 8px 16px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

.difficulty button:hover {
    background: #45a049;
}

.stats {
    display: flex;
    gap: 20px;
    font-weight: bold;
    color: #333;
}

.stats span {
    padding: 5px 10px;
    background: #f0f0f0;
    border-radius: 5px;
    font-size: 14px;
}

.game-board {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 300px;
    margin: 40px 0;
    position: relative;
}

.tower {
    position: relative;
    width: 200px;
    height: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: transform 0.2s;
}

.tower:hover {
    transform: translateY(-5px);
}

.tower-base {
    width: 180px;
    height: 20px;
    background: #8B4513;
    border-radius: 10px;
    position: absolute;
    bottom: 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.tower-pole {
    width: 8px;
    height: 250px;
    background: #654321;
    position: absolute;
    bottom: 20px;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.tower-label {
    position: absolute;
    bottom: -30px;
    font-weight: bold;
    color: #333;
    font-size: 16px;
}

.disk {
    height: 25px;
    border-radius: 15px;
    position: absolute;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    border: 2px solid #333;
    z-index: 10;
}

.disk:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.disk.selected {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
    z-index: 20;
}

.disk.size-1 {
    width: 60px;
    background: linear-gradient(45deg, #FF6B6B, #FF8E8E);
}

.disk.size-2 {
    width: 80px;
    background: linear-gradient(45deg, #4ECDC4, #6FE6DD);
}

.disk.size-3 {
    width: 100px;
    background: linear-gradient(45deg, #45B7D1, #6BC5E8);
}

.disk.size-4 {
    width: 120px;
    background: linear-gradient(45deg, #96CEB4, #A8D5BA);
}

.disk.size-5 {
    width: 140px;
    background: linear-gradient(45deg, #FECA57, #FED766);
}

.disk.size-6 {
    width: 160px;
    background: linear-gradient(45deg, #FF9FF3, #FFB3F7);
}

.tower.highlight {
    background: rgba(76, 175, 80, 0.2);
    border-radius: 10px;
}

.tower.invalid {
    background: rgba(244, 67, 54, 0.2);
    border-radius: 10px;
}

.message {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    min-height: 25px;
    color: #333;
    margin-top: 20px;
}

.victory-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.victory-popup.show {
    opacity: 1;
    visibility: visible;
}

.victory-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.victory-popup.show .victory-content {
    transform: scale(1);
}

.victory-content h2 {
    color: #4CAF50;
    margin-bottom: 20px;
    font-size: 2.5em;
}

.victory-content p {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.2em;
}

.victory-stats {
    margin: 20px 0;
    padding: 20px;
    background: #f0f0f0;
    border-radius: 10px;
}

.victory-stats p {
    margin: 10px 0;
    font-size: 1.1em;
}

.victory-stats span {
    font-weight: bold;
    color: #4CAF50;
}

#play-again {
    padding: 15px 30px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background 0.3s;
}

#play-again:hover {
    background: #45a049;
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
        width: 95%;
    }
    
    h1 {
        font-size: 2em;
    }
    
    .game-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .stats {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .game-board {
        height: 250px;
    }
    
    .tower {
        width: 150px;
        height: 230px;
    }
    
    .tower-base {
        width: 140px;
    }
    
    .tower-pole {
        height: 200px;
    }
    
    .disk.size-1 { width: 50px; }
    .disk.size-2 { width: 65px; }
    .disk.size-3 { width: 80px; }
    .disk.size-4 { width: 95px; }
    .disk.size-5 { width: 110px; }
    .disk.size-6 { width: 125px; }
}