/* ========================================
   Material Design 3 - Course Catalog
   ======================================== */
:root {
    --primary-color: var(--jexhrai-primary);
    --primary-light: color-mix(in srgb, var(--jexhrai-primary), transparent 85%);
    --primary-container: color-mix(in srgb, var(--jexhrai-primary), transparent 90%);
    --on-primary-container: var(--jexhrai-primary);

    --success-color: var(--color-success);

    /* Surface & Backgrounds */
    --surface: #ffffff;
    --surface-container: var(--k-p9);
    /* Base BG */
    --surface-container-low: #f3f4f6;
    --surface-container-high: #eceef2;

    /* Grays / Neutrals matching MD3 roles */
    --outline: var(--k-p6);
    --outline-variant: var(--k-p7);
    --on-surface: var(--jexhrai-text-main);
    --on-surface-variant: var(--k-p4);

    /* Shapes & Elevation */
    --shape-corner-large: 24px;
    --shape-corner-medium: 16px;
    --shape-corner-small: 12px;
    --shape-corner-full: 9999px;

    --elevation-1: 0 2px 6px rgba(0, 0, 0, 0.04);
    --elevation-2: 0 4px 12px rgba(0, 0, 0, 0.08);
    --elevation-3: 0 8px 24px rgba(0, 0, 0, 0.12);

    --transition-spring: cubic-bezier(0.2, 0.0, 0, 1.0);
    --transition-speed: 0.4s;
}

.course-catalog-container {
    width: calc(100% - 48px);
    max-width: 1600px;
    margin: 3rem auto;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Header Area */
.course-catalog-container .catalog-header {
    margin-bottom: 3rem;
    text-align: center;
    animation: slideUpFade 0.6s var(--transition-spring);
}

.course-catalog-container .catalog-header h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--on-surface);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.course-catalog-container .catalog-header p {
    font-size: 1.2rem;
    color: var(--on-surface-variant);
    margin-top: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Layout */
.course-catalog-container .catalog-body {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    align-items: start;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s var(--transition-spring);
}

.course-catalog-container .catalog-body.fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* Sidebar & Search */
.course-catalog-container .category-sidebar {
    background: transparent;
    position: sticky;
    top: 2rem;
}

.course-catalog-container .search-bar {
    position: relative;
    margin-bottom: 2.5rem;
    transition: transform 0.3s var(--transition-spring);
}

.course-catalog-container .search-bar:hover {
    transform: translateY(-2px);
}

.course-catalog-container .search-bar input {
    width: 100%;
    padding: 1.2rem 1.2rem 1.2rem 3.5rem;
    font-size: 1rem;
    color: var(--on-surface);
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--shape-corner-full);
    box-shadow: var(--elevation-1);
    box-sizing: border-box;
    transition: all 0.3s var(--transition-spring);
}

.course-catalog-container .search-bar input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light), var(--elevation-2);
    background: #fff;
}

.course-catalog-container .search-bar .icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--on-surface-variant);
    transition: color 0.3s;
}

.course-catalog-container .search-bar input:focus+.icon,
.course-catalog-container .search-bar:focus-within .icon {
    color: var(--primary-color);
}

/* Category List - MD3 Navigation Drawer Style */
.course-catalog-container .category-sidebar h3 {
    margin: 0 0 1.5rem 1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--on-surface-variant);
    font-weight: 700;
}

.course-catalog-container .category-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.course-catalog-container .category-list li {
    padding: 1rem 1.5rem;
    border-radius: var(--shape-corner-full);
    cursor: pointer;
    transition: all 0.3s var(--transition-spring);
    font-weight: 500;
    color: var(--on-surface-variant);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    font-size: 1rem;
}

.course-catalog-container .category-list li:hover {
    background-color: var(--surface-container-high);
    color: var(--on-surface);
    padding-left: 1.75rem;
}

.course-catalog-container .category-list li.active {
    background-color: var(--primary-container);
    color: var(--on-primary-container);
    font-weight: 700;
    padding-left: 1.75rem;
}

/* Animated Indicator for Active State */
.course-catalog-container .category-list li.active::before {
    content: '';
    position: absolute;
    left: 0.75rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--primary-color);
    animation: popIn 0.4s var(--transition-spring);
}

/* Course Grid */
.course-catalog-container .course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* Course Card - MD3 Elevated Card */
.course-catalog-container .course-card {
    background: var(--surface);
    border-radius: var(--shape-corner-large);
    box-shadow: var(--elevation-1);
    border: 0px solid transparent;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.4s var(--transition-spring);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    position: relative;
    isolation: isolate;
}

.course-catalog-container .course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 0 10px var(--jexhrai-container-glow);
    border-color: transparent;
}

/* Card Image with Zoom Effect */
.course-catalog-container .card-image {
    height: 220px;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.course-catalog-container .card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.4), transparent);
    opacity: 0.6;
    transition: opacity 0.3s;
}

.course-catalog-container .course-card:hover .card-image::after {
    opacity: 0.3;
}

/* Category Chip on Image */
.course-catalog-container .card-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.95);
    color: var(--on-surface);
    padding: 0.35rem 0.85rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--shape-corner-small);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 2;
    backdrop-filter: blur(4px);
    letter-spacing: 0.03em;
}

/* ======== A/B 模式徽章（課程清單強烈提示：右上角） ======== */
.course-catalog-container .card-generation-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--shape-corner-full);
    font-weight: 800;
    font-size: 0.82rem;
    letter-spacing: 0.02em;
    line-height: 1;
    user-select: none;
    -webkit-font-smoothing: antialiased;
    backdrop-filter: blur(10px);
}

.course-catalog-container .card-generation-badge .dot {
    width: 8px;
    height: 8px;
    border-radius: 9999px;
    display: inline-block;
}

.course-catalog-container .card-generation-badge--dynamic {
    color: var(--md-sys-color-on-primary-container);
    background: linear-gradient(
        120deg,
        color-mix(in srgb, var(--md-sys-color-primary-container), transparent 0%),
        color-mix(in srgb, var(--md-sys-color-primary), transparent 65%),
        color-mix(in srgb, var(--md-sys-color-tertiary-container), transparent 10%)
    );
    border: 1px solid color-mix(in srgb, var(--md-sys-color-primary), transparent 60%);
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--md-sys-color-primary), transparent 88%);
    background-size: 220% 220%;
    animation: jexhrai-badge-shimmer 2.8s ease-in-out infinite;
}

.course-catalog-container .card-generation-badge--dynamic .dot {
    background: var(--md-sys-color-primary);
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--md-sys-color-primary), transparent 80%);
    animation: jexhrai-dot-pulse 1.6s ease-in-out infinite;
}

.course-catalog-container .card-generation-badge--static {
    color: var(--md-sys-color-on-surface);
    background: color-mix(in srgb, var(--md-sys-color-surface), transparent 18%);
    border: 1px solid color-mix(in srgb, var(--md-sys-color-outline), transparent 55%);
    box-shadow: none;
}

.course-catalog-container .card-generation-badge--static .dot {
    background: var(--md-sys-color-outline);
}

@keyframes jexhrai-badge-shimmer {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes jexhrai-dot-pulse {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50% { transform: scale(1.25); opacity: 1; }
}

/* Invitation Badge - MD3 Filter Chip style */
.card-private-badge {
    background-color: var(--primary-container);
    color: var(--on-primary-container);
    padding: 0.35rem 0.85rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--shape-corner-small);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    width: fit-content;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

/* Card Content */
.course-catalog-container .card-content {
    padding: 1.75rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background: var(--surface);
}

.course-catalog-container .card-content h4 {
    margin: 0 0 0.75rem;
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--on-surface);
    transition: color 0.3s;
}

.course-catalog-container .course-card:hover .card-content h4 {
    color: var(--primary-color);
}

.course-catalog-container .card-content p {
    margin: 0 0 1.5rem;
    color: var(--on-surface-variant);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Meta Info */
.course-catalog-container .card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--on-surface-variant);
    border-top: 1px solid var(--outline-variant);
    padding-top: 1rem;
    margin-top: auto;
}

.course-catalog-container .card-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: 500;
}

/* Progress Bar - Tonal */
.course-catalog-container .card-progress {
    margin-top: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.course-catalog-container .card-progress .progress-text {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: right;
}

.course-catalog-container .card-progress .card-progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--surface-container-high);
    border-radius: var(--shape-corner-full);
    overflow: hidden;
}

.course-catalog-container .card-progress .card-progress-bar-inner {
    height: 100%;
    background: var(--primary-color);
    border-radius: var(--shape-corner-full);
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Completed Status - 已改為統一使用 progress bar（100%），不再使用章戳 ::before/::after */

/* Loading State */
.jexhrai-courses-list-container .courses-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    min-height: 300px;
}

.jexhrai-courses-list-container .courses-loading .loader {
    width: 60px;
    aspect-ratio: 1;
    display: grid;
    border: 4px solid transparent;
    border-radius: 50%;
    border-right-color: var(--primary-color);
    animation: coursesListSpin 1s infinite linear;
}

.jexhrai-courses-list-container .courses-loading .loader::before,
.jexhrai-courses-list-container .courses-loading .loader::after {
    content: "";
    grid-area: 1/1;
    margin: 2px;
    border: inherit;
    border-radius: 50%;
    animation: coursesListSpin 2s infinite;
}

.jexhrai-courses-list-container .courses-loading .loader::after {
    margin: 8px;
    animation-duration: 3s;
}

@keyframes coursesListSpin {
    100% {
        transform: rotate(1turn);
    }
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes popIn {
    0% {
        transform: scale(0);
    }

    80% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
    }
}

.course-catalog-container .no-results {
    grid-column: 1/-1;
    text-align: center;
    padding: 5rem;
    background: var(--surface-container-low);
    border-radius: var(--shape-corner-large);
    color: var(--on-surface-variant);
}

/* Mobile Responsive */
@media (max-width: 992px) {
    .course-catalog-container .catalog-body {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .course-catalog-container .category-sidebar {
        position: relative;
        top: 0;
        background: var(--surface);
        padding: 1.5rem;
        border-radius: var(--shape-corner-medium);
        box-shadow: var(--elevation-1);
        margin-bottom: 1rem;
        z-index: 10;
    }

    .course-catalog-container .category-list {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        gap: 0.5rem;
    }

    .course-catalog-container .category-list li {
        white-space: nowrap;
        padding: 0.75rem 1.25rem;
    }

    .course-catalog-container .category-list li:hover,
    .course-catalog-container .category-list li.active {
        padding-left: 1.25rem;
        /* No indent shift on mobile horizontal */
    }

    .course-catalog-container .category-list li.active::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .course-catalog-container {
        width: calc(100% - 32px);
        margin: 1.5rem 16px;
    }

    .course-catalog-container .catalog-header h1 {
        font-size: 2rem;
    }

    .course-catalog-container .course-grid {
        grid-template-columns: 1fr;
    }

    .course-catalog-container .card-image {
        height: 200px;
    }
}

/* ======== Card Target Audience ======== */
.card-target-audience {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    margin-bottom: 4px;
    font-size: 0.85rem;
    color: var(--md-sys-color-on-surface-variant);
}

.card-target-audience .icon svg {
    width: 14px;
    height: 14px;
    /* stroke: var(--md-sys-color-primary); */
}

.card-target-audience .text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}