/* ================================================
   thi_online.css - Styles for Online Exam listing page
   ================================================ */

/* ========== Hero Section ========== */
.thi-online-hero {
    background: linear-gradient(135deg, #1a5c2e 0%, #167479 50%, #0d4f6e 100%);
    padding: 3rem 0 2.5rem;
    position: relative;
    overflow: hidden;
}

.thi-online-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.thi-online-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.75rem;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.hero-title i {
    font-size: 2rem;
    opacity: 0.9;
}

.hero-subtitle {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ========== Filter Section ========== */
.thi-online-filter {
    padding: 1.25rem 0;
    background: #f8fafb;
    border-bottom: 1px solid #e8edf2;
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(10px);
}

.filter-form {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-select {
    padding: 10px 16px;
    border: 1.5px solid #dde2e8;
    border-radius: 10px;
    background: #fff;
    font-size: 0.875rem;
    color: #333;
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 160px;
    appearance: none;
    -webkit-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;
    padding-right: 32px;
}

.filter-select:hover {
    border-color: #167479;
}

.filter-select:focus {
    border-color: #167479;
    box-shadow: 0 0 0 3px rgba(22, 116, 121, 0.12);
}

.filter-search {
    flex: 1;
    min-width: 250px;
    position: relative;
    margin-left: auto;
}

.filter-search-input {
    width: 100%;
    padding: 10px 48px 10px 16px;
    border: 1.5px solid #dde2e8;
    border-radius: 10px;
    background: #fff;
    font-size: 0.875rem;
    outline: none;
    transition: all 0.2s ease;
}

.filter-search-input:focus {
    border-color: #167479;
    box-shadow: 0 0 0 3px rgba(22, 116, 121, 0.12);
}

.filter-search-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 38px;
    height: 38px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #1a5c2e, #167479);
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.filter-search-btn:hover {
    opacity: 0.9;
    transform: translateY(-50%) scale(1.05);
}

/* ========== Content Section ========== */
.thi-online-content {
    padding: 2rem 0 3rem;
    background: #f4f6f9;
    min-height: 50vh;
}

/* ========== Subject Section ========== */
.subject-section {
    margin-bottom: 2.5rem;
}

.subject-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(to right, #1a5c2e, #167479, transparent) 1;
}

.subject-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.subject-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, #1a5c2e, #167479);
    color: #fff;
    font-size: 16px;
    flex-shrink: 0;
}

.subject-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: #1a202c;
}

.subject-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

.subject-title a:hover {
    color: #167479;
}

.subject-count {
    display: inline-flex;
    align-items: center;
    background: rgba(22, 116, 121, 0.1);
    color: #167479;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.subject-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #167479;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s;
    padding: 6px 14px;
    border-radius: 8px;
}

.subject-more:hover {
    background: rgba(22, 116, 121, 0.08);
    transform: translateX(2px);
    color: #167479;
}

/* ========== Quiz Grid ========== */
.quiz-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* ========== Quiz Card ========== */
.quiz-card {
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    border: 1px solid #edf0f4;
}

.quiz-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: #d0e8e9;
}

.quiz-card-img {
    display: block;
    position: relative;
    padding-top: 58%;
    overflow: hidden;
}

.quiz-card-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.quiz-card:hover .quiz-card-img img {
    transform: scale(1.05);
}

.quiz-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.quiz-card:hover .quiz-card-overlay {
    opacity: 1;
}

.quiz-card-play {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    background: rgba(255, 255, 255, 0.95);
    color: #167479;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.9rem;
    transform: translateY(10px);
    transition: transform 0.3s ease;
}

.quiz-card:hover .quiz-card-play {
    transform: translateY(0);
}

.quiz-card-play i {
    font-size: 1.1rem;
}

.quiz-card-body {
    padding: 14px 16px 16px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.quiz-card-title {
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.quiz-card-title a {
    color: #1a202c;
    text-decoration: none;
    transition: color 0.2s;
}

.quiz-card-title a:hover {
    color: #167479;
}

.quiz-card-desc {
    font-size: 0.8rem;
    color: #64748b;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.quiz-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.quiz-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: #64748b;
    background: #f1f5f9;
    padding: 3px 8px;
    border-radius: 5px;
}

.quiz-meta-item i {
    color: #94a3b8;
    font-size: 11px;
}

.quiz-card-schedule {
    display: flex;
    flex-direction: column;
    gap: 3px;
    margin-bottom: 10px;
}

.schedule-item {
    font-size: 0.72rem;
    color: #059669;
    display: flex;
    align-items: center;
    gap: 4px;
}

.schedule-item i {
    width: 14px;
    text-align: center;
}

.schedule-item.schedule-close {
    color: #dc2626;
}

.quiz-card-footer {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-top: 10px;
    margin-top: auto;
    border-top: 1px solid #f1f5f9;
}

.quiz-stat {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: #94a3b8;
}

.quiz-stat i {
    font-size: 12px;
}

.quiz-btn-start {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-left: auto;
    padding: 6px 14px;
    background: linear-gradient(135deg, #1a5c2e, #167479);
    color: #fff;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.quiz-btn-start:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 116, 121, 0.3);
    color: #fff;
}

/* ========== Search Result Header ========== */
.search-result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.search-result-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a202c;
}

.result-count {
    background: rgba(22, 116, 121, 0.1);
    color: #167479;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ========== No Data ========== */
.no-data {
    text-align: center;
    padding: 4rem 2rem;
    color: #94a3b8;
}

.no-data-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: block;
    opacity: 0.5;
}

.no-data p {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #167479;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.back-link:hover {
    color: #167479;
    transform: translateX(-3px);
}

/* ========== Pagination ========== */
.pagination-wrapper {
    display: flex;
    justify-content: center;
}

.pagination-wrapper .pagination {
    display: flex;
    gap: 6px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagination-wrapper .pagination li a,
.pagination-wrapper .pagination li span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    border: 1px solid #e2e8f0;
    color: #475569;
    background: #fff;
}

.pagination-wrapper .pagination li.active span {
    background: linear-gradient(135deg, #1a5c2e, #167479);
    color: #fff;
    border-color: transparent;
}

.pagination-wrapper .pagination li a:hover {
    background: #f1f5f9;
    border-color: #167479;
    color: #167479;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .quiz-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .hero-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .quiz-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .thi-online-hero {
        padding: 2rem 0 1.5rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .filter-form {
        flex-direction: column;
    }

    .filter-group {
        width: 100%;
    }

    .filter-select {
        flex: 1;
        min-width: auto;
    }

    .filter-search {
        width: 100%;
        min-width: auto;
        margin-left: 0;
    }

    .subject-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .subject-title {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    .quiz-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .quiz-card {
        flex-direction: row;
    }

    .quiz-card-img {
        width: 120px;
        min-height: 100%;
        padding-top: 0;
        flex-shrink: 0;
    }

    .quiz-card-body {
        padding: 10px 12px;
    }

    .quiz-card-title {
        font-size: 0.85rem;
    }

    .quiz-card-desc {
        display: none;
    }

    .quiz-card-schedule {
        display: none;
    }

    .quiz-card-overlay {
        display: none;
    }

    .subject-header-left {
        flex-wrap: wrap;
    }
}