/* =====================================================
   High Skill — Courses & Card CSS
   ===================================================== */

/* ── Course Card ── */
.course-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}
.course-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.course-img-wrap {
    display: block;
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-bg-main);
}
.course-img-wrap img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.course-card:hover .course-img-wrap img { transform: scale(1.04); }

.course-badge-free {
    position: absolute; top: .65rem; left: .65rem;
    background: var(--color-success); color: #fff;
    font-size: .72rem; font-weight: 700;
    padding: .2rem .6rem;
    border-radius: var(--radius-full);
}

.course-body {
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: .35rem;
    flex: 1;
}

.course-category {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--color-accent);
    margin: 0;
}
.course-title {
    font-size: .97rem;
    font-weight: 700;
    line-height: 1.35;
    margin: 0;
    color: var(--color-primary);
}
.course-title a { color: inherit; text-decoration: none; }
.course-title a:hover { color: var(--color-accent); }

.course-instructor-row {
    display: flex;
    align-items: center;
    gap: .5rem;
}
.course-instructor-avatar {
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: .72rem;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.course-instructor {
    font-size: .82rem;
    color: var(--color-text-secondary);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: .35rem;
    font-size: .82rem;
    color: var(--color-text-secondary);
}
.course-rating .stars { color: var(--color-warning); font-size: .78rem; }

.course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: .65rem;
    border-top: 1px solid var(--color-border);
}
.course-price {
    font-family: 'Outfit', sans-serif;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-primary);
}
.course-price-free { color: var(--color-success); }

/* ── Grids ── */
.course-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}
.course-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

/* ── Courses Layout (sidebar + results) ── */
.courses-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 2rem;
    align-items: start;
}

.filter-sidebar {
    position: sticky;
    top: 80px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.filter-section {
    padding-bottom: 1.25rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--color-border);
}
.filter-section:last-of-type { border-bottom: none; margin-bottom: 0; }

.filter-section-title {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--color-text-secondary);
    margin-bottom: .85rem;
}

.filter-check-label {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .3rem 0;
    cursor: pointer;
    font-size: .88rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    user-select: none;
}
.filter-check-label:hover { color: var(--color-primary); }
.filter-check-label input { accent-color: var(--color-accent); cursor: pointer; }

.filter-checkbox { width: 15px; height: 15px; flex-shrink: 0; }

.filter-clear-link {
    background: none; border: none; cursor: pointer;
    font-size: .78rem; color: var(--color-accent);
    padding: .2rem 0; margin-top: .25rem;
    display: block;
}
.filter-clear-link:hover { text-decoration: underline; }

/* Results header */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.results-count { font-size: .9rem; color: var(--color-text-secondary); margin: 0; }

/* Pagination */
.hs-pagination { display: flex; gap: .4rem; justify-content: center; flex-wrap: wrap; }
.hs-page-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    border-radius: var(--radius-md);
    font-size: .88rem; font-weight: 600;
    color: var(--color-text-secondary);
    background: #fff;
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all var(--transition-fast);
}
.hs-page-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.hs-page-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 5rem 1rem;
    color: var(--color-text-secondary);
}
.empty-state-icon {
    font-size: 3rem;
    color: var(--color-border);
    margin-bottom: 1.25rem;
}

/* ── Course Detail ── */
.course-detail-hero {
    position: relative;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
    padding: 2.5rem 0 4rem 0;
    overflow: hidden;
}
.course-detail-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(249, 115, 22, 0.15) 0%, transparent 50%);
    pointer-events: none;
}
.course-detail-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: #fff;
    margin-bottom: 1rem;
    max-width: 720px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}
.course-detail-hero p { 
    color: rgba(255,255,255,.85); 
    max-width: 680px; 
    font-size: 1.05rem; 
    line-height: 1.7; 
    margin-bottom: 1.5rem; 
}

.course-detail-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 2.5rem;
    align-items: start;
}

.course-detail-meta {
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-wrap: wrap;
    font-size: .88rem;
    color: rgba(255,255,255,.65);
    margin-bottom: 1.25rem;
}
.course-detail-meta .stars { color: var(--color-warning); }

.course-detail-instructor {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-top: 1.25rem;
}
.course-detail-instructor-avatar {
    width: 46px; height: 46px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    font-weight: 700; font-size: 1.15rem;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}
.course-detail-instructor-avatar img { width: 100%; height: 100%; object-fit: cover; }
.course-detail-instructor-label { font-size: .75rem; color: rgba(255,255,255,.55); }
.course-detail-instructor-name { font-size: .92rem; color: rgba(255,255,255,.9); font-weight: 600; text-decoration: none; }
.course-detail-instructor-name:hover { color: var(--color-accent); }

/* Sidebar card */
.course-sidebar-card {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.18);
    overflow: hidden;
    position: sticky;
    top: 100px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    z-index: 10;
}
.course-sidebar-preview {
    position: relative;
    aspect-ratio: 16/9;
    background: var(--color-bg-main);
    overflow: hidden;
}
.course-sidebar-preview img { width: 100%; height: 100%; object-fit: cover; }
.course-sidebar-play {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(15, 23, 42, 0.4);
    cursor: pointer;
    transition: background 0.3s ease;
}
.course-sidebar-play:hover { background: rgba(15, 23, 42, 0.6); }
.play-btn {
    width: 68px; height: 68px;
    border-radius: 50%;
    background: #fff;
    color: var(--color-accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem;
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulse-orange 2s infinite;
}
.play-btn:hover { 
    transform: scale(1.15); 
    color: #fff;
    background: var(--color-accent);
    animation: none;
}

@keyframes pulse-orange {
    0% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(249, 115, 22, 0); }
    100% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0); }
}

.course-sidebar-body { padding: 1.5rem; }
.course-sidebar-price {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem; font-weight: 800;
    color: var(--color-primary);
    display: block; margin-bottom: .2rem;
}
.course-sidebar-price-old {
    font-size: 1.1rem;
    color: var(--color-muted);
    text-decoration: line-through;
    margin-right: .5rem;
}
.money-back-badge {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .8rem;
    color: var(--color-success);
    font-weight: 600;
    margin: .75rem 0;
    justify-content: center;
}

/* Enroll Button Enhancement */
.btn-enroll {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    border: none;
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-enroll:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.6);
    background: linear-gradient(135deg, #fb923c 0%, #f97316 100%);
    color: #fff;
}

.course-includes { margin-top: 1.25rem; }
.course-includes h5 { font-size: .88rem; font-weight: 700; color: var(--color-primary); margin-bottom: .75rem; }
.course-include-item {
    display: flex; align-items: center; gap: .6rem;
    font-size: .84rem; color: var(--color-text-secondary);
    padding: .3rem 0;
}
.course-include-item i { color: var(--color-accent); width: 16px; text-align: center; }

/* ── Tabs ── */
.course-tabs { display: flex; border-bottom: 2px solid var(--color-border); margin-bottom: 2rem; gap: 0; }
.course-tab {
    padding: .9rem 1.5rem;
    font-weight: 600;
    font-size: .9rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    text-decoration: none;
    transition: all var(--transition-fast);
    background: none; border-top: none; border-left: none; border-right: none;
}
.course-tab:hover { color: var(--color-primary); }
.course-tab.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }

/* ── Syllabus ── */
.syllabus-list { display: flex; flex-direction: column; gap: 0.75rem; }
.syllabus-item { 
    background: #fff; 
    border: 1px solid var(--color-border); 
    border-radius: var(--radius-lg); 
    overflow: hidden; 
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.syllabus-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    border-color: #d1d5db;
}
.syllabus-header {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: 1.15rem 1.25rem;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-primary);
    list-style: none;
    justify-content: space-between;
    user-select: none;
    transition: background-color 0.2s ease;
}
.syllabus-header:hover { background-color: #f8fafc; }
.syllabus-header i.ch-icon { transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); color: var(--color-muted); }
.syllabus-item[open] .syllabus-header i.ch-icon { transform: rotate(180deg); color: var(--color-accent); }
.syllabus-header::-webkit-details-marker { display: none; }
.syllabus-lectures { padding: .5rem 0 .75rem; border-top: 1px solid var(--color-border); margin-top: 0; }
.syllabus-lecture {
    display: flex; align-items: center; gap: .75rem;
    padding: .55rem 1.25rem;
    font-size: .88rem;
    color: var(--color-text-secondary);
    transition: background var(--transition-fast);
}
.syllabus-lecture:hover { background: rgba(249,115,22,.04); }
.syllabus-lecture i { color: var(--color-muted); width: 16px; text-align: center; }
.lecture-duration { margin-left: auto; font-size: .78rem; color: var(--color-muted); }

/* ── Instructor Section ── */
.instructor-card {
    display: flex; gap: 1.5rem; align-items: flex-start;
    padding: 2rem;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.instructor-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}
.instructor-avatar-lg {
    width: 100px; height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent) 0%, #f59e0b 100%);
    color: #fff;
    font-size: 2.5rem; font-weight: 800;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 8px 16px rgba(249, 115, 22, 0.2);
}
.instructor-avatar-lg img { width: 100%; height: 100%; object-fit: cover; }

.instructor-socials { display: flex; gap: 0.75rem; margin-top: 1rem; }
.instructor-socials a {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--color-bg-main);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
}
.instructor-socials a:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* ── Reviews ── */
.review-item {
    background: #fff;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin-bottom: 1rem;
    transition: box-shadow 0.2s ease;
}
.review-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
.review-header {
    display: flex; gap: 1rem; align-items: center; margin-bottom: 1rem;
}
.review-avatar {
    width: 48px; height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, #312e81 100%);
    color: #fff;
    font-weight: 700; font-size: 1.1rem;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.review-name { font-weight: 700; color: var(--color-primary); font-size: 1rem; margin-bottom: 0.2rem; }
.review-date { font-size: 0.82rem; color: var(--color-muted); }
.review-body { color: var(--color-text-secondary); line-height: 1.6; margin: 0; font-size: 0.95rem; }

/* ── Free Preview Video ── */
.video-ratio {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.video-ratio iframe, .video-ratio video {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    border: none;
}

/* ── Course Includes Grid ── */
.course-includes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .5rem;
    margin-bottom: 2rem;
}
.course-includes-item {
    display: flex; align-items: center; gap: .6rem;
    font-size: .88rem; color: var(--color-text-secondary);
    padding: .4rem 0;
}
.course-includes-item i { color: var(--color-accent); width: 18px; text-align: center; }