.choose-container {
    max-width: 1200px;
    margin: 0 auto;
}

.number-container {
    background: var(--card-bg);
    border-radius: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
    margin-bottom: 3rem;
}

.prefix-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.prefix-btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    background: white;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.prefix-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.prefix-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: transparent;
}

.number-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.number-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.8rem;
    text-align: center;
}

.number-table td {
    padding: 0.5rem;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
    transition: all 0.2s ease;
}

.number-table tr:hover td {
    background-color: var(--hover-color);
}

.number-cell {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin: 0.1rem;
    font-size: 0.95rem;
}

.number-cell.occupied {
    background-color: #ffebee;
    color: #f44336;
    text-decoration: line-through;
    cursor: not-allowed;
    pointer-events: none;
}
.number-cell:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.current-year {
    font-weight: bold;
    color: var(--primary-color);
}

@media (min-width: 1200px) {
    .number-table td {
        width: 16.666%;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .number-table td {
        width: 20%;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .number-table td {
        width: 25%;
    }
}

@media (min-width: 576px) and (max-width: 767px) {
    .number-table td {
        width: 33.333%;
    }
}

@media (max-width: 575px) {
    .number-table td {
        width: 50%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 100%;
        right: 0;
        flex-direction: column;
        background: white;
        padding: 1rem;
        border-radius: 0.5rem;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        visibility: hidden;
    }

    .nav-links.active {
        max-height: 500px;
        opacity: 1;
        visibility: visible;
    }

    .menu-toggle {
        display: block;
    }

    .nav-link {
        padding: 0.8rem 1.5rem;
    }

    .number-container {
        padding: 1rem;
    }

    .prefix-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .number-table th,
    .number-table td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem 0.5rem;
    }

    .number-table {
        font-size: 0.9rem;
    }

    .number-cell {
        padding: 0.3rem 0.6rem;
    }
}