/* ================= Courses (public) ================= */

.courses-section { padding: 2rem 0 4rem; }

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.6rem;
}

.course-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
    color: inherit;
}
.course-card:hover {
    transform: translateY(-5px);
    border-color: var(--hd-teal);
    box-shadow: 0 20px 40px rgba(127, 224, 212, 0.15);
    color: inherit;
}

.course-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, rgba(21,157,144,.25), rgba(12,122,112,.25));
}
.course-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.course-thumb-fallback {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    font-size: 3rem; color: var(--hd-teal);
}
.course-access-badge {
    position: absolute; top: 10px; inset-inline-end: 10px;
    padding: 4px 12px; border-radius: 999px;
    font-size: .8rem; font-weight: 700;
    background: var(--hd-teal); color: #06322c;
}
.course-access-badge.free { background: var(--success-color); color: #fff; }

.course-card-body { padding: 1.1rem 1.2rem 1.3rem; }
.course-card-body h3 { font-size: 1.15rem; margin-bottom: .4rem; color: var(--text-primary); }
.course-card-body p { color: var(--text-secondary); font-size: .9rem; margin-bottom: .8rem; min-height: 2.4em; }
.course-meta { color: var(--hd-teal); font-size: .82rem; font-weight: 600; }

/* ================= Course detail + player ================= */

.course-detail { padding: 1.5rem 0 4rem; }
.course-detail-title { font-size: 1.9rem; margin: .6rem 0 1.4rem; }

.course-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 1.6rem;
    align-items: start;
}
@media (max-width: 860px) {
    .course-layout { grid-template-columns: 1fr; }
}

.video-wrap {
    position: relative; width: 100%; padding-top: 56.25%;
    border-radius: 12px; overflow: hidden; background: #000;
    border: 1px solid var(--border-color);
}
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.now-playing { margin-top: 1rem; font-size: 1.2rem; }

.course-locked {
    text-align: center; padding: 3rem 1.5rem;
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px;
}
.course-locked i { font-size: 2.6rem; color: var(--hd-teal); margin-bottom: 1rem; }
.course-locked h3 { margin-bottom: .6rem; }
.course-locked p { color: var(--text-secondary); margin-bottom: 1.2rem; }

.course-about {
    margin-top: 1.6rem; padding: 1.2rem 1.4rem;
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px;
}
.course-about h4 { margin-bottom: .5rem; }
.course-about p { color: var(--text-secondary); line-height: 1.9; }

/* curriculum sidebar */
.course-curriculum {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 1rem; position: sticky; top: 90px;
    max-height: calc(100vh - 110px); overflow-y: auto;
}
.curriculum-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.enrolled-badge { color: var(--success-color); font-size: .82rem; font-weight: 700; }

.curriculum-section { margin-bottom: 1rem; }
.curriculum-section-title { font-weight: 700; font-size: .95rem; margin-bottom: .5rem; color: var(--text-primary); }
.curriculum-section ul { list-style: none; padding: 0; margin: 0; }

.curriculum-ep a, .curriculum-ep .ep-locked {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 10px; border-radius: 8px;
    color: var(--text-secondary); font-size: .88rem;
    transition: background .2s ease, color .2s ease;
}
.curriculum-ep a:hover { background: rgba(127, 224, 212, 0.1); color: var(--text-primary); }
.curriculum-ep.current a { background: var(--hd-teal); color: #06322c; font-weight: 600; }
.curriculum-ep span { flex: 1; }
.curriculum-ep small { color: inherit; opacity: .7; }
.curriculum-ep.locked .ep-locked { opacity: .55; cursor: not-allowed; }

.ep-badge {
    background: rgba(127, 224, 212, 0.16); color: var(--hd-teal);
    font-size: .68rem; font-weight: 700; padding: 1px 7px; border-radius: 999px; flex: 0 0 auto;
}

/* ===== price display (discount) ===== */
.course-price-old {
    text-decoration: line-through;
    opacity: 0.6;
    font-weight: 500;
    margin-inline-end: 6px;
}
.course-price-final { font-weight: 700; }
.course-price-badge {
    display: inline-block;
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    font-size: 0.72em;
    font-weight: 700;
    padding: 1px 7px;
    border-radius: 999px;
    margin-inline-start: 4px;
}
/* discount ribbon on the course card thumbnail */
.course-discount-ribbon {
    position: absolute;
    top: 10px;
    inset-inline-start: 10px;
    background: #ef4444;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35);
}

/* ================= Course detail (syllabus, no player) ================= */
.course-hero {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 1.8rem;
    align-items: start;
    margin: 1rem 0 2.4rem;
}
@media (max-width: 820px) { .course-hero { grid-template-columns: 1fr; } }

.course-hero-media {
    border-radius: 14px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, rgba(21,157,144,.2), rgba(12,122,112,.2));
    border: 1px solid var(--border-color);
}
.course-hero-media img { width: 100%; height: 100%; object-fit: cover; display: block; }

.course-hero-desc { color: var(--text-secondary); line-height: 1.9; margin: .6rem 0 1rem; }
.course-hero-meta { display: flex; gap: 1.4rem; color: var(--text-secondary); font-size: .92rem; margin-bottom: 1.2rem; }
.course-hero-meta i { color: var(--hd-teal); margin-inline-end: 6px; }

.course-access-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.3rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: .9rem;
    align-items: flex-start;
}
.course-price-line { font-size: 1.4rem; }
.course-price-line .course-price-final { color: var(--hd-teal); font-weight: 800; }
.course-access-hint { color: var(--text-secondary); font-size: .85rem; margin: 0; line-height: 1.7; }
.course-access-panel .cta-btn { align-self: stretch; }

/* syllabus */
.course-curriculum-title { font-size: 1.35rem; margin: 0 0 1rem; }
.course-syllabus { display: flex; flex-direction: column; gap: .8rem; }
.syllabus-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}
.syllabus-section-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: .9rem 1.2rem;
    background: rgba(127, 224, 212, 0.05);
    border-bottom: 1px solid var(--border-color);
}
.syllabus-section-title { font-weight: 700; color: var(--text-primary); }
.syllabus-section-count { color: var(--text-secondary); font-size: .82rem; }
.syllabus-list { list-style: none; margin: 0; padding: .6rem 0; }
.syllabus-list li {
    padding: .55rem 1.2rem;
    color: var(--text-secondary);
    font-size: .92rem;
}
.syllabus-list li i { color: var(--hd-teal); font-size: .8rem; margin-inline-end: 10px; }
/* mixed Arabic/Latin titles are wrapped in <bdi> in the markup */
.syllabus-list li bdi, .course-detail-title bdi, .syllabus-section-title bdi { unicode-bidi: isolate; }