/* ============================================
   萬大發電廠環境教育學習網 - 環境教育老師介紹頁
   kun 2025-01-16
   ============================================ */

/* ============================================
   4張輪播圖設定覆蓋
   ============================================ */
.banner-carousel .carousel-slide {
    animation: fadeSlide4 16s infinite;
}

.banner-carousel .carousel-slide:nth-child(1) {
    animation-delay: 0s;
}

.banner-carousel .carousel-slide:nth-child(2) {
    animation-delay: 4s;
}

.banner-carousel .carousel-slide:nth-child(3) {
    animation-delay: 8s;
}

.banner-carousel .carousel-slide:nth-child(4) {
    animation-delay: 12s;
}

/* 淡入淡出動畫 (4張圖片版本，每張佔 25%) */
@keyframes fadeSlide4 {
    0% {
        opacity: 0;
    }

    5% {
        opacity: 1;
    }

    25% {
        opacity: 1;
    }

    30% {
        opacity: 0;
    }

    100% {
        opacity: 0;
    }
}

/* ============================================
   TEACHER FILTER - 專業領域篩選區域
   ============================================ */
.teacher-filter-section {
    max-width: var(--container-content);
    margin: var(--spacing-5xl) auto var(--spacing-4xl);
    padding: 0 var(--container-padding-md);
}

.teacher-filter-container {
    background: var(--color-white);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-lg);
}

.teacher-filter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.filter-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-label {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    white-space: nowrap;
    min-width: 120px;
}

.filter-input-group {
    flex: 1;
    max-width: 300px;
}

.filter-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color var(--transition-fast);
}

.filter-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.filter-input::placeholder {
    color: var(--color-placeholder);
    text-align: center;
}

.filter-select-group {
    min-width: 120px;
}

.filter-select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-right: var(--spacing-3xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-white);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: border-color var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.filter-submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-3xl);
    background: var(--color-primary-light);
    color: var(--color-white);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    white-space: nowrap;
}

.filter-submit-btn:hover {
    background: var(--color-primary-hover);
}

.filter-submit-btn span {
    font-weight: var(--font-weight-bold);
}

/* ============================================
   TEACHER SECTION - 老師簡介區塊
   ============================================ */
.teacher-section {
    max-width: var(--container-content);
    margin: var(--spacing-6xl) auto;
    padding: 0 var(--container-padding-md);
}

/* ============================================
   TEACHER CARDS - 老師卡片
   ============================================ */
.teacher-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-4xl);
}

.teacher-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: left;
    transition: all var(--transition-fast);
}

/* 單數卡片有背景色 */
.teacher-card:nth-child(odd) {
    background: var(--color-primary-bg-card);
    color: var(--color-dark-blue);
}

.teacher-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

/* 老師頭像 */
.teacher-avatar {
    width: 120px;
    height: 120px;
    margin-bottom: var(--spacing-lg);
    flex-shrink: 0;
}

.teacher-avatar img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 老師資訊 */
.teacher-info {
    width: 100%;
}

.teacher-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark-blue);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.teacher-detail {
    margin-bottom: var(--spacing-sm);
}

.teacher-detail .detail-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark-blue);
    margin-bottom: 2px;
}

.teacher-detail .detail-value {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: var(--line-height-relaxed);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .teacher-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }

    .teacher-card {
        padding: var(--spacing-xl);
    }

    .teacher-avatar {
        width: 100px;
        height: 100px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .teacher-section {
        margin: var(--spacing-4xl) auto;
    }

    .teacher-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .teacher-card {
        padding: var(--spacing-lg);
    }

    .teacher-avatar {
        width: 80px;
        height: 80px;
    }

    .teacher-name {
        font-size: var(--font-size-base);
    }

    .teacher-detail .detail-label,
    .teacher-detail .detail-value {
        font-size: var(--font-size-xs);
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .teacher-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .teacher-card {
        padding: var(--spacing-xl);
        flex-direction: row;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }

    .teacher-avatar {
        width: 80px;
        height: 80px;
        margin-bottom: 0;
    }

    .teacher-name {
        text-align: left;
        font-size: var(--font-size-base);
    }

    .teacher-detail .detail-label,
    .teacher-detail .detail-value {
        font-size: var(--font-size-sm);
    }
}