/* KLTN Styles */

.kltn-year-list {
    list-style: none;
    padding: 0;
    margin: 0 0 3rem 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.kltn-year {
    margin-bottom: 1.5rem;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    overflow: hidden;
    background-color: #f9f9f9;
    transition: all 0.3s ease;
}

.kltn-year:hover {
    box-shadow: 0 4px 12px rgba(0, 48, 86, 0.15);
}

.kltn-year-header {
    padding: 1.6rem 2rem;
    margin: 0;
    background-color: var(--backgr-color-1);
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    user-select: none;
}

.kltn-year-header:hover {
    background-color: var(--light-blue-color);
}

.kltn-year-header i {
    font-size: 1.4rem;
    transition: transform 0.3s ease;
}

.kltn-year.open .kltn-year-header {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.kltn-year.open .kltn-year-header i {
    transform: rotate(-180deg);
}

.kltn-major-list {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: var(--white-color);
    display: none;
}

.kltn-major-item {
    padding: 0;
    border-bottom: 1px solid #e0e0e0;
    transition: all 0.2s ease;
}

.kltn-major-item:last-child {
    border-bottom: none;
}

.kltn-major-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
}

.kltn-major-title {
    display: flex;
    align-items: center;
    padding: 1.4rem 2rem;
    color: var(--primary-color);
    font-size: 1.6rem;
    font-weight: 500;
    flex: 1;
}

.kltn-major-title i {
    font-size: 1.8rem;
    margin-right: 1.2rem;
    color: var(--primary-color);
}

.kltn-major-title span {
    flex: 1;
}

.kltn-major-link {
    display: flex;
    align-items: center;
    padding: 1.4rem 2rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.6rem;
    font-weight: 500;
    transition: all 0.2s ease;
    flex: 1;
}

.kltn-major-link:hover {
    background-color: var(--backgr-color-1);
    padding-left: 2.5rem;
}

.kltn-major-link i {
    font-size: 1.8rem;
    margin-right: 1.2rem;
    color: var(--primary-color);
}

.kltn-major-link span {
    flex: 1;
}

.kltn-download-all-btn {
    padding: 0.8rem 1.5rem;
    margin-right: 1.5rem;
    background-color: var(--primary-color);
    color: var(--white-color);
    border: none;
    border-radius: 4px;
    font-size: 1.3rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.kltn-download-all-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 48, 86, 0.2);
}

.kltn-download-all-btn i {
    margin-right: 0.5rem;
}

/* Responsive */
@media (max-width: 767px) {
    .kltn-year-header {
        font-size: 1.6rem;
        padding: 1.2rem 1.5rem;
    }

    .kltn-major-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .kltn-major-title {
        font-size: 1.5rem;
        padding: 1.2rem 1.5rem 0.6rem 1.5rem;
    }

    .kltn-download-all-btn {
        width: 100%;
        margin: 0.6rem 1.5rem 1.2rem 1.5rem;
        text-align: center;
    }

    .kltn-year-list {
        max-width: 100%;
    }
}