/**
 * Course Cards - Gamification-Ready Styles
 * Prepared for future GamiPress integration
 *
 * Structure:
 * - Base card styles
 * - Thumbnail & badge system
 * - Content sections
 * - Progress indicators
 * - Gamification stats
 * - Action buttons
 * - Modifiers & states
 */

/* ==========================================================================
   Base Card Styles
   ========================================================================== */

.course-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(8, 34, 49, 0.08);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(8, 34, 49, 0.15);
    border-color: #01b9e4;
}

/* Card State Modifiers */
.course-card--enrolled {
    /* Future: Add visual indicators for enrolled status */
}

.course-card--completed {
    /* Future: Add completion celebration effects */
}

.course-card--in-progress {
    /* Future: Add progress pulse animations */
}

/* ==========================================================================
   Thumbnail & Badge System
   ========================================================================== */

.course-card__thumbnail {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}

.course-card__thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-card__thumbnail-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #cbd5e1;
}

/* Badge Container - Supports Multiple Badges */
.course-card__badges {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-end;
    max-width: 200px; /* Prevent overflow */
    z-index: 10;
}

/* Base Badge Styles */
.course-card__badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    animation: badgeSlideIn 0.4s ease-out;
}

@keyframes badgeSlideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Badge Variants */
.course-card__badge--completed {
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: #fff;
}

.course-card__badge--progress {
    background: linear-gradient(135deg, #01b9e4, #0199bd);
    color: #fff;
}

.course-card__badge--open,
.course-card__badge--free {
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: #fff;
}

/* Future: Gamification Badges */
.course-card__badge--achievement {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.course-card__badge--streak {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
}

.course-card__badge--level {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: #fff;
}

/* ==========================================================================
   Content Section
   ========================================================================== */

.course-card__content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* Gamification Header (Top of Content) */
.course-card__gamification-header {
    min-height: 24px;
    margin-bottom: 8px;
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

/* Future: Level badge in header */
.course-card__level-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: #fff;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Title */
.course-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #082231;
    margin: 0 0 12px 0;
    line-height: 1.3;
}

.course-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.course-card__title a:hover {
    color: #01b9e4;
}

/* Description */
.course-card__description {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0 0 16px 0;
    flex: 1;
}

/* ==========================================================================
   Progress Indicators
   ========================================================================== */

.course-card__progress {
    margin-bottom: 16px;
}

.course-card__progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.course-card__progress-track {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 999px;
    overflow: hidden;
}

.course-card__progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #01b9e4, #0ea5e9);
    border-radius: 999px;
    transition: width 0.6s ease;
}

/* Future: Circular Progress Ring */
.course-card__progress-ring {
    position: relative;
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
}

.course-card__progress-ring svg {
    transform: rotate(-90deg);
}

.progress-ring__label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.progress-ring__percentage {
    font-size: 0.875rem;
    font-weight: 700;
    color: #01b9e4;
}

/* ==========================================================================
   Gamification Stats Section
   ========================================================================== */

.course-card__stats {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
    padding: 16px;
    background: #f8fafc;
    border-radius: 12px;
    min-height: 60px;
    flex-wrap: wrap;
}

/* Individual Stat Item */
.course-card__stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.course-card__stat-icon {
    font-size: 1.1rem;
    line-height: 1;
}

.course-card__stat-content {
    display: flex;
    flex-direction: column;
}

.course-card__stat-label {
    font-size: 0.75rem;
    color: #94a3b8;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1;
    margin-bottom: 2px;
}

.course-card__stat-value {
    font-size: 1rem;
    font-weight: 700;
    color: #082231;
    line-height: 1;
}

/* Stat Item Variants (for different gamification metrics) */
.course-card__stat-item--xp .course-card__stat-value {
    color: #f59e0b;
}

.course-card__stat-item--badges .course-card__stat-value {
    color: #8b5cf6;
}

.course-card__stat-item--achievements .course-card__stat-value {
    color: #16a34a;
}

/* ==========================================================================
   Action Buttons
   ========================================================================== */

.course-card__actions {
    /* Container for buttons */
}

.course-card__button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    border-radius: 12px;
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: none;
}

.course-card__button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* Button Variants */
.course-card__button--primary {
    background: linear-gradient(135deg, #01b9e4, #0199bd);
}

.course-card__button--diploma {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    margin-bottom: 12px;
}

.course-card__button--completed {
    background: linear-gradient(135deg, #16a34a, #15803d);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 768px) {
    .course-card__content {
        padding: 20px;
    }

    .course-card__badges {
        top: 12px;
        right: 12px;
        gap: 6px;
    }

    .course-card__badge {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .course-card__stats {
        gap: 12px;
        padding: 12px;
    }

    .course-card__title {
        font-size: 1.1rem;
    }
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .course-card,
    .course-card__badge,
    .course-card__button,
    .course-card__progress-bar {
        transition: none !important;
        animation: none !important;
    }
}

.course-card a:focus-visible,
.course-card__button:focus-visible {
    outline: 3px solid #01b9e4;
    outline-offset: 3px;
}

/* ==========================================================================
   Future Enhancements - Placeholder Classes
   ========================================================================== */

/* Achievement unlock animation */
@keyframes achievementUnlock {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate(-10deg);
    }
    50% {
        transform: scale(1.1) rotate(5deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0);
    }
}

.course-card__achievement-unlocked {
    animation: achievementUnlock 0.6s ease-out;
}

/* XP gain animation */
@keyframes xpGain {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-4px);
    }
}

.course-card__stat-item--xp.is-gaining {
    animation: xpGain 0.4s ease-in-out;
}

/* Streak flame pulse */
@keyframes flamePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.course-card__badge--streak .course-card__stat-icon {
    animation: flamePulse 1s ease-in-out infinite;
}

/* Level up celebration */
.course-card--level-up {
    animation: levelUpGlow 1s ease-out;
}

@keyframes levelUpGlow {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(8, 34, 49, 0.08);
    }
    50% {
        box-shadow: 0 0 40px rgba(139, 92, 246, 0.6);
    }
}