/* ============================================================
   pages/courses.css — Estilos para las páginas de cursos
   ============================================================ */

/* ── Course List ─────────────────────────────────────────── */
.courses-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.courses-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.courses-header p {
    font-size: 1.1rem;
    color: var(--color-muted);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.course-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    transition: border-color var(--transition);
}

.course-card:hover {
    border-color: var(--color-accent);
}

.course-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.course-card__level {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius);
    font-weight: 600;
}

.course-card__level--beginner {
    background: rgba(21, 128, 61, 0.2);
    color: #4ade80;
}

.course-card__level--intermediate {
    background: rgba(234, 179, 8, 0.2);
    color: #fbbf24;
}

.course-card__level--advanced {
    background: rgba(230, 57, 70, 0.2);
    color: #f87171;
}

.course-card__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.course-card__title {
    font-size: 1.3rem;
    margin: 0;
}

.course-card__title a {
    color: var(--color-text);
}

.course-card__title a:hover {
    color: var(--color-accent);
}

.course-card__description {
    color: var(--color-muted);
    line-height: 1.6;
}

.course-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--color-muted);
}

.course-card__footer {
    display: flex;
    gap: var(--spacing-sm);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-muted);
}

/* ── Course Detail ───────────────────────────────────────── */
.course-detail {
    max-width: 900px;
    margin: 0 auto;
}

.course-detail__header {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.course-detail__meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.course-badge {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-muted);
}

.course-badge--beginner {
    background: rgba(21, 128, 61, 0.2);
    color: #4ade80;
}

.course-badge--intermediate {
    background: rgba(234, 179, 8, 0.2);
    color: #fbbf24;
}

.course-badge--advanced {
    background: rgba(230, 57, 70, 0.2);
    color: #f87171;
}

.course-detail h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.course-detail__instructor {
    color: var(--color-muted);
    margin-bottom: var(--spacing-md);
}

.course-detail__description {
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.course-detail__actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.course-detail__login-prompt {
    margin: 0;
}

/* ── Course Lessons ──────────────────────────────────────── */
.course-lessons {
    margin-top: var(--spacing-xl);
}

.course-lessons h2 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
}

.lesson-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.lesson-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    transition: border-color var(--transition);
}

.lesson-item:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.lesson-item--clickable {
    cursor: pointer;
}

.lesson-item--clickable:hover {
    border-color: var(--color-accent);
    background: rgba(230, 57, 70, 0.05);
}

.lesson-item__link {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    width: 100%;
    color: inherit;
    text-decoration: none;
}

.lesson-item__lock {
    font-size: 0.85rem;
    opacity: 0.4;
    margin-left: auto;
}

.lesson-item__order {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.lesson-item__content {
    flex: 1;
}

.lesson-item__title {
    font-size: 1rem;
    margin: 0 0 var(--spacing-xs) 0;
}

.lesson-item__duration {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.course-lessons__empty {
    text-align: center;
    color: var(--color-muted);
    padding: var(--spacing-xl);
}

/* ── Modals ──────────────────────────────────────────────── */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal--active {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    cursor: pointer;
}

.modal__content {
    position: relative;
    background: #0a0a0a;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    transform: scale(0.9);
    transition: transform 0.3s ease;
    z-index: 1;
}

.modal--active .modal__content {
    transform: scale(1);
}

.modal__close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-muted);
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition);
    line-height: 1;
}

.modal__close:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
}

.modal__icon {
    font-size: 4rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.modal__title {
    font-size: 1.75rem;
    text-align: center;
    margin: 0 0 var(--spacing-lg) 0;
}

.modal__body {
    text-align: center;
    color: var(--color-muted);
    line-height: 1.6;
}

.modal__body p {
    margin: 0 0 var(--spacing-md) 0;
}

.modal__course-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-accent);
    margin: var(--spacing-md) 0 !important;
}

.modal__instructor {
    font-size: 1rem;
    margin: var(--spacing-sm) 0 !important;
}

.modal__motivation {
    font-size: 1.05rem;
    color: var(--color-text);
    margin-top: var(--spacing-lg) !important;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius);
    border-left: 3px solid var(--color-accent);
}

.modal__warning-list {
    font-weight: 600;
    margin-bottom: var(--spacing-sm) !important;
}

.modal__list {
    text-align: left;
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.modal__list li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.modal__footer {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.modal__footer form {
    margin: 0;
}

.modal__content--success {
    border-top: 3px solid var(--color-accent);
}

.modal__content--warning {
    border-top: 3px solid #ffc107;
}

.modal__content--warning .modal__icon {
    color: #ffc107;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
    .courses-header h1 {
        font-size: 1.8rem;
    }

    .courses-header p {
        font-size: 0.95rem;
    }

    .courses-header {
        margin-bottom: var(--spacing-lg);
    }

    .courses-grid {
        grid-template-columns: 1fr;
    }

    .course-card {
        padding: var(--spacing-md);
    }

    .course-detail h1 {
        font-size: 1.8rem;
    }

    .course-detail__header {
        padding: var(--spacing-md);
    }

    .course-detail__actions {
        flex-direction: column;
    }

    .course-detail__actions .btn {
        width: 100%;
        text-align: center;
    }

    .lesson-item {
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    .lesson-item__order {
        width: 32px;
        height: 32px;
        font-size: 0.85rem;
    }

    .modal__content {
        padding: var(--spacing-lg);
        width: 95%;
    }

    .modal__title {
        font-size: 1.4rem;
    }

    .modal__footer {
        flex-direction: column;
    }

    .modal__footer .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .courses-header h1 {
        font-size: 1.4rem;
    }

    .course-detail h1 {
        font-size: 1.4rem;
    }

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

    .course-card__meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}