/**
 * Star University Styles
 * Extends sma-design-system - only plugin-specific overrides
 * Version: 2.0.0
 */

/* ==========================================================================
   Dashboard Container
   ========================================================================== */
.su-dashboard {
    max-width: 100%;
    padding: var(--sma-space-4) 0;
    font-family: var(--sma-font-family);
    line-height: var(--sma-line-height-normal);
    color: var(--sma-gray-900);
}

/* ==========================================================================
   Tab Navigation
   ========================================================================== */
.su-tabs {
    display: flex;
    gap: var(--sma-space-2);
    margin-bottom: var(--sma-space-6);
    border-bottom: 2px solid var(--sma-gray-200);
    padding-bottom: 0;
}

.su-tab {
    display: flex;
    align-items: center;
    gap: var(--sma-space-2);
    padding: var(--sma-space-3) var(--sma-space-5);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    font-family: var(--sma-font-family);
    font-size: var(--sma-font-size-base);
    font-weight: var(--sma-font-weight-semibold);
    color: var(--sma-gray-500);
    cursor: pointer;
    transition: all var(--sma-transition-fast);
    white-space: nowrap;
}

.su-tab:hover {
    color: var(--sma-gray-700);
    background: var(--sma-gray-50);
}

.su-tab-active {
    color: var(--sma-primary);
    border-bottom-color: var(--sma-primary);
}

.su-tab-active:hover {
    color: var(--sma-primary);
    background: transparent;
}

.su-tab svg {
    flex-shrink: 0;
}

.su-tab-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 var(--sma-space-2);
    background: var(--sma-gray-100);
    color: var(--sma-gray-600);
    border-radius: var(--sma-radius-full);
    font-size: var(--sma-font-size-xs);
    font-weight: var(--sma-font-weight-medium);
}

.su-tab-active .su-tab-count {
    background: var(--sma-primary);
    color: var(--sma-white);
}

/* Tab Content */
.su-tab-content {
    display: none;
}

.su-tab-content-active {
    display: block;
    animation: su-fade-in 0.2s ease-out;
}

@keyframes su-fade-in {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Filter Bar & Search
   ========================================================================== */
.su-filter-bar {
    justify-content: flex-start;
    flex-wrap: nowrap;
}

.su-field {
    min-height: 40px;
    width: auto;
    min-width: 0;
}

.su-search {
    position: relative;
    flex: 1 1 300px;
    min-width: 200px;
    max-width: 600px;
}

.su-search input {
    width: 100%;
    padding-left: 36px;
}

.su-search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--sma-font-size-base);
    color: var(--sma-gray-400);
    pointer-events: none;
}

.su-search-wide {
    max-width: 600px;
    flex: 1 1 400px;
}

.su-reset-btn {
    white-space: nowrap;
}

/* ==========================================================================
   Results Info
   ========================================================================== */
.su-results-info {
    padding: var(--sma-space-2) 0;
}

/* ==========================================================================
   Grid Layout
   ========================================================================== */
.su-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--sma-space-6);
}

/* ==========================================================================
   Card Styles
   ========================================================================== */
.su-card {
    display: flex;
    flex-direction: column;
    background: var(--sma-white);
    border: 1px solid var(--sma-gray-200);
    border-radius: var(--sma-radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all var(--sma-transition-normal);
}

.su-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sma-shadow-lg);
    border-color: var(--sma-gray-300);
}

.su-card:focus {
    outline: 2px solid var(--sma-primary);
    outline-offset: 2px;
}

/* Card Thumbnail */
.su-card__thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--sma-gray-100);
}

.su-card__thumbnail--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--sma-gray-100) 0%, var(--sma-gray-200) 100%);
}

.su-card__placeholder-icon {
    color: var(--sma-gray-400);
}

.su-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--sma-transition-normal);
}

.su-card:hover .su-card__image {
    transform: scale(1.05);
}

/* Video Play Button Overlay */
.su-card__play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--sma-transition-normal);
}

.su-card__play-btn svg {
    width: 28px;
    height: 28px;
    color: var(--sma-white);
    margin-left: 4px; /* Visual centering for play icon */
}

.su-card:hover .su-card__play-btn {
    opacity: 1;
}

/* Playlist Badge Overlay */
.su-card__playlist-badge {
    position: absolute;
    bottom: var(--sma-space-2);
    right: var(--sma-space-2);
    display: flex;
    align-items: center;
    gap: var(--sma-space-1);
    padding: var(--sma-space-1) var(--sma-space-2);
    background: rgba(0, 0, 0, 0.8);
    border-radius: var(--sma-radius-sm);
    color: var(--sma-white);
    font-size: var(--sma-font-size-xs);
    font-weight: var(--sma-font-weight-medium);
}

.su-card__playlist-badge svg {
    width: 14px;
    height: 14px;
}

/* Card Content */
.su-card__content {
    padding: var(--sma-space-4);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--sma-space-2);
}

.su-card__title {
    font-size: var(--sma-font-size-base);
    font-weight: var(--sma-font-weight-semibold);
    color: var(--sma-gray-900);
    margin: 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.su-card__excerpt {
    font-size: var(--sma-font-size-sm);
    color: var(--sma-gray-600);
    margin: 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.su-card__meta {
    font-size: var(--sma-font-size-xs);
    color: var(--sma-gray-500);
    margin: 0;
    margin-top: auto;
    padding-top: var(--sma-space-2);
}

/* Video card with "Watch on YouTube" button */
.su-card--video {
    display: flex;
    flex-direction: column;
}

.su-card--video:hover {
    transform: translateY(-4px);
    box-shadow: var(--sma-shadow-lg);
    border-color: var(--sma-gray-300);
}

.su-card--video:hover .su-card__play-btn {
    opacity: 1;
}

.su-card--video:hover .su-card__image {
    transform: scale(1.05);
}

.su-card__main-link {
    display: flex;
    flex-direction: column;
    flex: 1;
    text-decoration: none;
    color: inherit;
}

.su-card__main-link:focus {
    outline: 2px solid var(--sma-primary);
    outline-offset: 2px;
}

.su-card__actions {
    padding: 0 var(--sma-space-4) var(--sma-space-4);
    margin-top: var(--sma-space-2);
}

/* Course card: clickable div with full-width CTA */
.su-card[data-type="course"] {
    cursor: pointer;
}

.su-card__cta {
    display: block;
    width: 100%;
    text-align: center;
    cursor: pointer;
}

/* ==========================================================================
   Empty State
   ========================================================================== */
.su-empty-state {
    text-align: center;
    padding: var(--sma-space-12) var(--sma-space-6);
    background: var(--sma-gray-50);
    border-radius: var(--sma-radius-lg);
    max-width: 480px;
    margin: var(--sma-space-8) auto;
}

.su-empty-state__icon {
    color: var(--sma-gray-400);
    margin-bottom: var(--sma-space-4);
}

.su-empty-state__icon svg {
    width: 64px;
    height: 64px;
}

.su-empty-state__title {
    font-size: var(--sma-font-size-lg);
    font-weight: var(--sma-font-weight-semibold);
    color: var(--sma-gray-900);
    margin: 0 0 var(--sma-space-2);
}

.su-empty-state__text {
    font-size: var(--sma-font-size-base);
    color: var(--sma-gray-600);
    margin: 0;
    line-height: 1.6;
}

/* ==========================================================================
   Message States (Login, Profile)
   ========================================================================== */
.su-message {
    text-align: center;
    padding: var(--sma-space-12) var(--sma-space-6);
    background: var(--sma-gray-50);
    border-radius: var(--sma-radius-lg);
    max-width: 480px;
    margin: var(--sma-space-8) auto;
}

.su-message__icon {
    color: var(--sma-gray-400);
    margin-bottom: var(--sma-space-4);
}

.su-message__icon svg {
    width: 64px;
    height: 64px;
}

.su-message__title {
    font-size: var(--sma-font-size-lg);
    font-weight: var(--sma-font-weight-semibold);
    color: var(--sma-gray-900);
    margin: 0 0 var(--sma-space-2);
}

.su-message__text {
    font-size: var(--sma-font-size-base);
    color: var(--sma-gray-600);
    margin: 0 0 var(--sma-space-6);
    line-height: 1.6;
}

.su-message--login .su-message__icon {
    color: var(--sma-primary);
}

.su-message--profile .su-message__icon {
    color: var(--sma-warning);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    .su-dashboard {
        padding: var(--sma-space-3) 0;
    }

    .su-tabs {
        gap: 0;
        margin-bottom: var(--sma-space-4);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .su-tabs::-webkit-scrollbar {
        display: none;
    }

    .su-tab {
        padding: var(--sma-space-3) var(--sma-space-4);
        font-size: var(--sma-font-size-sm);
    }

    .su-tab svg {
        width: 18px;
        height: 18px;
    }

    .su-tab-count {
        min-width: 20px;
        height: 20px;
        font-size: 11px;
    }

    .su-grid {
        grid-template-columns: 1fr;
        gap: var(--sma-space-4);
    }

    .su-card__content {
        padding: var(--sma-space-3);
    }

    .su-card__title {
        font-size: var(--sma-font-size-sm);
    }

    .su-empty-state,
    .su-message {
        padding: var(--sma-space-8) var(--sma-space-4);
        margin: var(--sma-space-4) auto;
    }

    .su-empty-state__icon svg,
    .su-message__icon svg {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .su-grid {
        gap: var(--sma-space-3);
    }

    .su-card__excerpt {
        -webkit-line-clamp: 1;
    }
}

/* ==========================================================================
   Loading State
   ========================================================================== */
.su-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--sma-space-12);
    gap: var(--sma-space-4);
}

.su-loading__spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--sma-gray-200);
    border-top-color: var(--sma-primary);
    border-radius: 50%;
    animation: su-spin 0.8s linear infinite;
}

@keyframes su-spin {
    to {
        transform: rotate(360deg);
    }
}

/* Card loading state (for SSO) */
.su-card--loading {
    position: relative;
    opacity: 0.7;
}

.su-card--loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 32px;
    height: 32px;
    border: 3px solid var(--sma-gray-200);
    border-top-color: var(--sma-primary);
    border-radius: 50%;
    animation: su-spin 0.8s linear infinite;
    z-index: 10;
}