.level-select-container {
    padding: 2vh 2vw;
    height: 98dvh;
    height: 98vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
}

.header {
    width: 100%;
    max-width: 900px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 3vh;
}

.header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin: 0;
    flex: 1;
    text-align: center;
}

.back-button {
    background: #667eea;
    color: #fff;
    border: 2px solid #5568d3;
    padding: 1vh 2vw;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5vw;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.back-button:hover {
    background: #5568d3;
    border-color: #4451b8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 2vh 2vw;
    width: 100%;
    max-width: 900px;
    margin-bottom: 3vh;
}

.level-card {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 1.5vh;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1vh;
}

.level-card.unlocked {
    cursor: pointer;
}

.level-card.unlocked:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.level-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.level-number {
    font-size: 1.2rem;
    font-weight: bold;
    color: #1a1a2e;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.5vh 1vw;
    border-radius: 6px;
    margin-bottom: 0.5vh;
    text-align: center;
}

.level-thumbnail {
    width: 80%;
    aspect-ratio: 1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(12, 1fr);
    gap: 1px;
    background: #1a1a2e;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.lock-container {
    width: 80%;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1vh;
}

.thumbnail-cell {
    width: 100%;
    height: 100%;
}

.thumbnail-cell.water {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
}

.thumbnail-cell.sand {
    background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
}

.thumbnail-cell.longjump {
    background: linear-gradient(135deg, #f39c12 0%, #f59e0b 100%);
}

.thumbnail-cell.start {
    background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
}

.thumbnail-cell.goal {
    background: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
}

.lock-icon {
    font-size: 3rem;
}

.lock-text {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
}

.reset-container {
    width: 100%;
    max-width: 900px;
    display: flex;
    justify-content: center;
    padding: 2vh 0;
}

.reset-btn {
    background: rgba(239, 68, 68, 0.2);
    color: #fff;
    border: 2px solid rgba(239, 68, 68, 0.4);
    padding: 1.5vh 3vw;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    background: rgba(239, 68, 68, 0.3);
    border-color: rgba(239, 68, 68, 0.6);
    transform: translateY(-2px);
}

.modal-buttons {
    display: flex;
    gap: 2vw;
    margin-top: 2vh;
}

.modal-buttons button {
    flex: 1;
}

/* Mobile Anpassungen */
@media (max-width: 768px) {
    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: 1.5vh 2vw;
    }

    .header h1 {
        font-size: 2rem;
    }
    
    .back-button {
        font-size: 1rem;
        padding: 0.8vh 1.5vw;
    }

    .level-number {
        font-size: 1rem;
    }

    .lock-icon {
        font-size: 2.5rem;
    }
    
    .lock-text {
        font-size: 0.9rem;
    }
}