/* ========================================================
   COURSES HERO & SEARCH SECTION
   ======================================================== */
.courses-hero {
    padding: 3.5rem 0 3rem 0;
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at top, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
    text-align: center;
}

.courses-hero .hero-badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.courses-hero .hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.courses-hero .hero-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 580px;
    margin: 0 auto 1.75rem auto;
}

/* Hero Search Box */
.courses-search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.courses-search-input {
    width: 100%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 0.85rem 0.75rem 2.5rem;
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.courses-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.courses-search-icon {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    stroke: var(--text-muted);
    pointer-events: none;
}

/* ========================================================
   COURSES GRID & FILTER BAR
   ======================================================== */
.courses-container {
    padding: 3rem 0;
}

.courses-filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.courses-count {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.courses-count strong {
    color: var(--text-primary);
}

/* Filter Pills Container & Buttons */
.filter-pills {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-pills .pill {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.45rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.filter-pills .pill:hover {
    color: var(--text-primary);
    border-color: var(--border-highlight);
    background: var(--bg-card-hover);
}

.filter-pills .pill.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

/* Course Cards Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.75rem;
}

/* Course Card Item */
.course-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.course-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.course-card-img-wrap {
    height: 180px;
    position: relative;
    overflow: hidden;
    background: #000;
}

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

.course-price-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(16, 185, 129, 0.9);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

.course-card-body {
    padding: 1.25rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.course-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.course-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Course Section Preview Hierarchy */
.course-sections-preview {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    margin-bottom: 1.25rem;
}

.course-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.course-section-item {
    font-size: 0.78rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-section-item:last-child {
    margin-bottom: 0;
}

.course-section-dot {
    width: 6px;
    height: 6px;
    background-color: var(--primary);
    border-radius: 50%;
    flex-shrink: 0;
}

/* Stats Footer */
.course-card-footer {
    padding: 0.85rem 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.15);
}

.course-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--primary);
    color: #fff;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    transition: background 0.2s ease;
}

.course-btn-primary:hover {
    background: var(--primary-hover);
}

/* ========================================================
   RESPONSIVE TUNING
   ======================================================== */
@media (max-width: 480px) {
    .courses-hero .hero-title {
        font-size: 1.6rem;
    }

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

    .filter-pills .pill {
        padding: 0.35rem 0.75rem;
        font-size: 0.75rem;
    }
}