/* Course catalog page — enhanced UX */

/* ── Hero layout + instructor portrait ── */
.course-hero-grid {
    display: grid;
    gap: 2.5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

@media (min-width: 1024px) {
    .course-hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
        gap: 3rem 4rem;
    }
}

.course-hero-content {
    text-align: center;
}

@media (min-width: 1024px) {
    .course-hero-content {
        text-align: left;
    }
}

.course-hero-portrait-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 20rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .course-hero-portrait-wrap { max-width: 22rem; }
}

@media (min-width: 1024px) {
    .course-hero-portrait-wrap {
        max-width: none;
        height: 100%;
        margin: 0;
        padding-left: 0.5rem;
    }
}

.course-hero-portrait-img {
    width: 100%;
    max-width: 23rem;
    height: auto;
    max-height: min(65vh, 32rem);
    display: block;
    object-fit: contain;
    object-position: center top;
    background: transparent;
}

@media (min-width: 1024px) {
    .course-hero-portrait-img {
        max-width: 100%;
        max-height: min(58vh, 30rem);
    }
}

@media (min-width: 1024px) {
    .course-quick-jump {
        justify-content: flex-start;
    }
}

/* ── Hero orbit icons ── */
.course-hero-orbit {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.course-orbit-icon {
    position: absolute;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    background: rgba(0, 255, 136, 0.06);
    border: 1px solid rgba(0, 255, 136, 0.15);
    color: rgba(0, 255, 136, 0.5);
    animation: courseOrbitFloat 6s ease-in-out infinite;
}

.course-orbit-icon:nth-child(1) { top: 15%; left: 8%; animation-delay: 0s; }
.course-orbit-icon:nth-child(2) { top: 25%; right: 10%; animation-delay: 1s; color: rgba(0, 180, 255, 0.5); border-color: rgba(0, 180, 255, 0.15); }
.course-orbit-icon:nth-child(3) { bottom: 30%; left: 12%; animation-delay: 2s; }
.course-orbit-icon:nth-child(4) { bottom: 20%; right: 15%; animation-delay: 0.5s; color: rgba(147, 51, 234, 0.5); border-color: rgba(147, 51, 234, 0.15); }
.course-orbit-icon:nth-child(5) { top: 40%; left: 5%; animation-delay: 1.5s; }
.course-orbit-icon:nth-child(6) { top: 50%; right: 6%; animation-delay: 2.5s; }

@keyframes courseOrbitFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.4; }
    50% { transform: translateY(-12px) rotate(5deg); opacity: 0.8; }
}

/* Quick jump */
.course-quick-jump {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.course-quick-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.65rem;
    min-width: 4.25rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 0.875rem;
    cursor: pointer;
    transition: all 0.25s;
    color: rgba(255, 255, 255, 0.55);
}

.course-quick-btn:hover,
.course-quick-btn.active {
    background: rgba(0, 255, 136, 0.1);
    border-color: rgba(0, 255, 136, 0.35);
    color: #00ff88;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.15);
}

.course-quick-btn-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    background: rgba(0, 255, 136, 0.08);
}

.course-quick-btn.active .course-quick-btn-icon {
    background: rgba(0, 255, 136, 0.2);
}

.course-quick-btn-label {
    font-size: 0.625rem;
    font-weight: 700;
}

.course-hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

@media (min-width: 640px) {
    .course-hero-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

.course-stat-card {
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid rgba(0, 255, 136, 0.12);
    border-radius: 1rem;
    padding: 1rem;
    text-align: center;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.course-stat-icon {
    width: 2.25rem;
    height: 2.25rem;
    margin: 0 auto 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.625rem;
    background: rgba(0, 255, 136, 0.1);
    color: #00ff88;
    transition: transform 0.3s, box-shadow 0.3s;
}

.course-stat-card.is-pulse .course-stat-icon,
.course-stat-card:hover .course-stat-icon {
    transform: scale(1.1);
    box-shadow: 0 0 16px rgba(0, 255, 136, 0.35);
}

.course-stat-card:hover {
    border-color: rgba(0, 255, 136, 0.3);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.1);
    transform: translateY(-2px);
}

/* Steps */
.course-step-card {
    position: relative;
    text-align: center;
    padding: 1.5rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 1.125rem;
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.course-step-card:hover {
    border-color: rgba(0, 255, 136, 0.25);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 255, 136, 0.08);
}

.course-step-num {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    font-size: 0.625rem;
    font-weight: 800;
    color: rgba(0, 255, 136, 0.35);
}

.course-step-icon {
    width: 3.5rem;
    height: 3.5rem;
    margin: 0 auto 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.15), rgba(0, 180, 255, 0.1));
    border: 1px solid rgba(0, 255, 136, 0.2);
    color: #00ff88;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.course-step-card:hover .course-step-icon {
    transform: scale(1.08) rotate(-3deg);
    box-shadow: 0 0 28px rgba(0, 255, 136, 0.25);
}

.course-step-title {
    font-size: 0.9375rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.35rem;
}

.course-step-desc {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.5;
}

/* Toolbar */
.course-toolbar-sentinel {
    height: 1px;
    margin-top: -1px;
}

.course-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    justify-content: space-between;
    padding: 0.85rem 1.15rem;
    margin-bottom: 1.25rem;
    background: rgba(5, 10, 24, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 1rem;
    backdrop-filter: blur(16px);
    transition: box-shadow 0.3s, border-color 0.3s;
}

.course-toolbar.is-stuck {
    position: sticky;
    top: 4.25rem;
    z-index: 30;
    border-color: rgba(0, 255, 136, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 1px rgba(0, 255, 136, 0.15);
}

.course-search-wrap {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 28rem;
}

.course-search-icon {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(0, 255, 136, 0.5);
    pointer-events: none;
}

.course-search-input {
    width: 100%;
    padding: 0.65rem 2.5rem 0.65rem 2.5rem;
    font-size: 0.875rem;
    color: #fff;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.course-search-input:focus {
    border-color: rgba(0, 255, 136, 0.4);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

.course-search-input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.course-search-clear {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
}

.course-search-clear.hidden { display: none; }

.course-result-count {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
}

.course-result-count i { color: #00ff88; }

/* Category filter */
.course-filter-scroll {
    position: relative;
    margin-bottom: 2rem;
    margin-left: -0.25rem;
    margin-right: -0.25rem;
    padding: 0 0.25rem 0.35rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.course-filter-scroll::-webkit-scrollbar {
    display: none;
}

.course-filter-bar {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.5rem;
    justify-content: flex-start;
    min-width: min-content;
    padding-bottom: 0.15rem;
}

@media (min-width: 1024px) {
    .course-filter-bar {
        flex-wrap: wrap;
        justify-content: center;
    }
}

.course-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.62);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.course-filter-btn:hover {
    color: #00ff88;
    border-color: rgba(0, 255, 136, 0.25);
    background: rgba(0, 255, 136, 0.06);
}

.course-filter-btn.active {
    color: #030508;
    background: linear-gradient(135deg, #00ff88, #00b4ff);
    border-color: transparent;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.35);
}

/* Course cards */
.course-card {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    aspect-ratio: 3 / 4;
    background: rgba(0, 0, 0, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1.35rem;
    padding: 0;
    overflow: hidden;
    transition: transform 0.25s ease, border-color 0.25s, box-shadow 0.25s;
}

.course-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.05), transparent 55%, rgba(0, 180, 255, 0.03));
    opacity: 0;
    transition: opacity 0.25s;
    pointer-events: none;
    z-index: 1;
}

.course-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 255, 136, 0.28);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(0, 255, 136, 0.06);
}

.course-card:hover::after { opacity: 1; }

.course-card.featured {
    border-color: rgba(0, 255, 136, 0.35);
    box-shadow: 0 0 40px rgba(0, 255, 136, 0.12);
}

.course-card.is-hidden {
    display: none;
}

/* Thumbnail — 80% of card height */
.course-card-thumb {
    position: relative;
    flex: 0 0 80%;
    min-height: 0;
    overflow: hidden;
    background: #000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.course-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    transition: transform 0.5s ease, filter 0.35s ease;
    display: block;
    filter: brightness(0.88) saturate(0.92);
}

.course-card:hover .course-card-thumb img {
    transform: scale(1.03);
    filter: brightness(0.95) saturate(1);
}

.course-card-thumb-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.96) 0%,
        rgba(0, 0, 0, 0.72) 38%,
        rgba(0, 0, 0, 0.28) 68%,
        rgba(0, 0, 0, 0.12) 100%
    );
    pointer-events: none;
    z-index: 1;
}

.course-card-thumb .ref-product-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    z-index: 2;
}

.course-card-thumb .ref-product-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    left: auto;
    z-index: 2;
}

.course-card-badge {
    font-size: 0.625rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.32rem 0.7rem;
    border-radius: 9999px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.course-card-badge-icon {
    flex-shrink: 0;
}

.ref-product-badge-new.course-card-badge {
    animation: courseBadgePulse 2.4s ease-in-out infinite;
}

@keyframes courseBadgePulse {
    0%, 100% { box-shadow: 0 0 14px rgba(0, 180, 255, 0.35); }
    50% { box-shadow: 0 0 22px rgba(147, 51, 234, 0.55), 0 0 8px rgba(0, 180, 255, 0.4); }
}

.course-thumb-bottom {
    position: absolute;
    bottom: 0.65rem;
    left: 0.75rem;
    right: 0.75rem;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    pointer-events: none;
}

.course-thumb-bottom .course-thumb-preview {
    pointer-events: auto;
}

.course-thumb-duration {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.6875rem;
    font-weight: 700;
    color: #fff;
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0.35rem 0.65rem;
    border-radius: 9999px;
    border: 1px solid rgba(0, 255, 136, 0.22);
    box-shadow: 0 0 14px rgba(0, 255, 136, 0.12);
}

.course-thumb-duration i {
    color: #00ff88;
    flex-shrink: 0;
}

.course-thumb-preview {
    position: static;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    min-height: 1.85rem;
    padding: 0.35rem 0.7rem;
    font-size: 0.625rem;
    font-weight: 700;
    color: #fff;
    border: 1px solid rgba(0, 180, 255, 0.35);
    border-radius: 9999px;
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    cursor: pointer;
    opacity: 1;
    transform: none;
    box-shadow: 0 0 14px rgba(0, 180, 255, 0.15);
    transition: background 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.course-thumb-preview-label {
    line-height: 1;
    letter-spacing: 0.02em;
}

.course-thumb-preview i {
    color: #00b4ff;
}

.course-card:hover .course-thumb-preview {
    opacity: 1;
    transform: translateY(-1px);
    border-color: rgba(0, 255, 136, 0.45);
    background: rgba(0, 255, 136, 0.12);
    box-shadow: 0 0 18px rgba(0, 255, 136, 0.25);
}

.course-card:hover .course-thumb-preview i {
    color: #00ff88;
}

.course-thumb-preview:hover {
    background: rgba(0, 255, 136, 0.18);
    border-color: rgba(0, 255, 136, 0.5);
    color: #fff;
}

.course-thumb-preview:hover i {
    color: #00ff88;
}

.course-card-thumb-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 10rem;
}

.course-card-body {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    flex: 0 0 20%;
    min-height: 0;
    overflow: hidden;
    padding: 0.55rem 0.75rem 0.6rem;
}

.course-card--compact .course-card-body {
    padding: 0.45rem 0.65rem 0.5rem;
}

.course-card--compact .course-card-meta,
.course-card--compact .course-card-highlights,
.course-card--compact .course-card-tools {
    display: none;
}

.course-card--compact .course-card-subtitle {
    display: none;
}

.course-card--compact .course-card-title {
    font-size: 0.8125rem;
    -webkit-line-clamp: 2;
    margin-bottom: 0;
    line-height: 1.25;
}

.course-card--compact .course-card-footer {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.course-card-header {
    display: none;
}

.course-card-icon {
    width: 3.25rem;
    height: 3.25rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.course-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-bottom: 0.35rem;
}

.course-meta-tag {
    font-size: 0.625rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.course-meta-tag--duration {
    color: #00b4ff;
    border-color: rgba(0, 180, 255, 0.25);
    background: rgba(0, 180, 255, 0.08);
}

.course-meta-tag--level {
    color: #00ff88;
    border-color: rgba(0, 255, 136, 0.25);
    background: rgba(0, 255, 136, 0.08);
}

.course-card-title {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.875rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 0.2rem;
}

.course-card-subtitle {
    font-size: 0.6875rem;
    color: rgba(255, 255, 255, 0.52);
    line-height: 1.4;
    margin-bottom: 0.35rem;
    flex-grow: 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card:has(.course-card-thumb img) .course-card-meta,
.course-card:has(.course-card-thumb img) .course-card-highlights,
.course-card:has(.course-card-thumb img) .course-card-tools {
    display: none;
}

.course-card:has(.course-card-thumb img) .course-card-subtitle {
    display: none;
}

/* Thumb cards — polished 20% text zone */
.course-card:has(.course-card-thumb img) .course-card-body {
    justify-content: space-between;
    gap: 0.3rem;
    padding: 0.42rem 0.7rem 0.48rem;
    background: linear-gradient(180deg, rgba(3, 5, 8, 0.98) 0%, #000 100%);
    border-top: 1px solid rgba(0, 255, 136, 0.1);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.course-card:has(.course-card-thumb img) .course-card-title {
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    line-height: 1.25;
    margin: 0;
    color: rgba(255, 255, 255, 0.96);
    -webkit-line-clamp: 2;
}

.course-card:has(.course-card-thumb img) .course-card-footer {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
    gap: 0.45rem;
    min-height: 0;
}

.course-card:has(.course-card-thumb img) .course-card-price {
    display: inline-flex;
    align-items: center;
    gap: 0.28rem;
    min-width: 0;
    font-size: 0;
    line-height: 1;
}

.course-card:has(.course-card-thumb img) .course-price-icon {
    width: 0.8125rem;
    height: 0.8125rem;
    flex-shrink: 0;
    color: #00ff88;
    opacity: 0.9;
}

.course-card:has(.course-card-thumb img) .course-price-amount {
    font-size: 0.9375rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    color: #fff;
    white-space: nowrap;
}

.course-card:has(.course-card-thumb img) .course-price-unit {
    font-size: 0.5625rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.42);
    white-space: nowrap;
}

.course-card:has(.course-card-thumb img) .course-btn-ghost {
    display: none;
}

.course-card:has(.course-card-thumb img) .course-card-actions {
    flex-shrink: 0;
}

.course-card:has(.course-card-thumb img) .course-card-cta {
    padding: 0.36rem 0.8rem;
    font-size: 0.6875rem;
    font-weight: 700;
    min-height: 1.75rem;
    box-shadow: 0 2px 10px rgba(0, 255, 136, 0.22);
}

.course-card:has(.course-card-thumb img) .course-card-cta i {
    width: 0.8125rem !important;
    height: 0.8125rem !important;
}

.course-card-highlights {
    list-style: none;
    padding: 0;
    margin: 0 0 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.course-card-highlights li {
    display: flex;
    align-items: flex-start;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.68);
    line-height: 1.45;
}

.course-card-highlights li i {
    color: #00ff88;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.course-card-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 1rem;
}

.course-tool-chip {
    font-size: 0.625rem;
    font-weight: 600;
    padding: 0.22rem 0.52rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.course-tool-chip--more {
    color: #00b4ff;
    border-color: rgba(0, 180, 255, 0.25);
    background: rgba(0, 180, 255, 0.08);
}

.course-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.course-card-price {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 1.375rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.course-price-amount {
    font-variant-numeric: tabular-nums;
}

.course-price-unit {
    font-size: 0.75rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.45);
}

.course-price-icon {
    width: 1rem;
    height: 1rem;
    color: #00ff88;
    opacity: 0.85;
    flex-shrink: 0;
}

.course-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.6rem 1.15rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: #000;
    background: linear-gradient(135deg, #00ff88, #00b4ff);
    border-radius: 9999px;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
    min-height: 2.5rem;
}

.course-card-cta:hover {
    transform: scale(1.03);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
}

/* Featured banner */
.course-featured-banner {
    position: relative;
    overflow: hidden;
    border-radius: 1.5rem;
    border: 1px solid rgba(0, 255, 136, 0.25);
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.08) 0%, rgba(0, 180, 255, 0.06) 50%, rgba(147, 51, 234, 0.06) 100%);
    padding: 2rem;
    margin-bottom: 2.5rem;
}

.course-featured-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 20rem;
    height: 20rem;
    background: radial-gradient(circle, rgba(0, 255, 136, 0.15), transparent 70%);
    pointer-events: none;
}

.course-featured-media {
    display: flex;
    justify-content: center;
    align-items: center;
}

.course-featured-image {
    position: relative;
    width: 100%;
    max-width: 28rem;
    border-radius: 1.125rem;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 136, 0.25);
    box-shadow: 0 0 50px rgba(0, 255, 136, 0.15), 0 20px 50px rgba(0, 0, 0, 0.45);
}

.course-featured-image img {
    width: 100%;
    height: auto;
    display: block;
    vertical-align: middle;
}

.course-featured-image .course-card-thumb-overlay {
    background: linear-gradient(to top, rgba(3, 5, 8, 0.5) 0%, transparent 40%);
}

/* Benefits row */
.course-benefit-card {
    text-align: center;
    padding: 1.5rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 1rem;
    transition: border-color 0.2s;
}

.course-benefit-card:hover {
    border-color: rgba(0, 255, 136, 0.2);
}

.course-benefit-icon {
    width: 3rem;
    height: 3rem;
    margin: 0 auto 0.75rem;
    border-radius: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.1);
    color: #00ff88;
}

.course-benefit-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.35rem;
}

.course-benefit-desc {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.5;
}

/* Stats values */
.course-stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: #00ff88;
    text-shadow: 0 0 12px rgba(0, 255, 136, 0.4);
    line-height: 1.2;
}

.course-stat-label {
    font-size: 0.6875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 0.25rem;
}

.course-filter-btn.active i {
    filter: drop-shadow(0 0 4px rgba(0, 0, 0, 0.3));
}

.course-card--reveal {
    animation: courseCardIn 0.4s ease both;
}

@keyframes courseCardIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.course-grid-wrap .grid.hidden { display: none; }

#courseGrid {
    gap: 1.25rem;
}

@media (min-width: 1024px) {
    #courseGrid {
        gap: 1.5rem;
    }
}

/* Empty state */
.course-empty {
    text-align: center;
    padding: 3rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(255, 255, 255, 0.1);
    border-radius: 1.25rem;
}

.course-empty.hidden { display: none; }

.course-empty-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    background: rgba(0, 255, 136, 0.08);
    color: rgba(0, 255, 136, 0.5);
}

.course-empty-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.35rem;
}

.course-empty-desc {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 1.25rem;
}

.course-btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.15rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #00ff88;
    background: transparent;
    border: 1px solid rgba(0, 255, 136, 0.35);
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s;
}

.course-btn-outline:hover {
    background: rgba(0, 255, 136, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.15);
}

/* Card icons & thumb extras */
.course-thumb-icon {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 2;
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.625rem;
}

@media (min-width: 768px) {
    .course-thumb-preview {
        opacity: 0.92;
    }

    .course-card:hover .course-thumb-preview {
        opacity: 1;
    }
}

.course-title-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 0.5rem;
    flex-shrink: 0;
    vertical-align: middle;
    margin-right: 0.35rem;
}

.course-title-icon-lg {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 0.75rem;
}

.course-hl-icon {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    background: rgba(0, 255, 136, 0.12);
    color: #00ff88;
    margin-top: 0.05rem;
}

.course-meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.course-tool-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.course-card-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.course-btn-ghost {
    width: 2.125rem;
    height: 2.125rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: all 0.2s;
}

.course-btn-ghost:hover {
    border-color: rgba(0, 255, 136, 0.35);
    color: #00ff88;
    background: rgba(0, 255, 136, 0.08);
}

/* Featured extras */
.course-featured-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #00ff88;
    margin-bottom: 1rem;
}

.course-featured-play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    pointer-events: none;
}

.course-featured-play i {
    width: 3.5rem;
    height: 3.5rem;
    padding: 0.85rem;
    border-radius: 9999px;
    background: rgba(0, 255, 136, 0.2);
    border: 2px solid rgba(0, 255, 136, 0.5);
    color: #00ff88;
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
    animation: coursePlayPulse 2s ease infinite;
}

@keyframes coursePlayPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 20px rgba(0, 255, 136, 0.25); }
    50% { transform: scale(1.06); box-shadow: 0 0 40px rgba(0, 255, 136, 0.45); }
}

.course-benefit-card:hover .course-benefit-icon {
    transform: scale(1.08);
    box-shadow: 0 0 24px rgba(0, 255, 136, 0.25);
}

.course-benefit-icon {
    transition: transform 0.3s, box-shadow 0.3s;
}

/* Modal */
.course-modal {
    position: fixed;
    inset: 0;
    z-index: 220;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.course-modal.hidden { display: none; }

body.course-modal-open { overflow: hidden; }

.course-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 5, 8, 0.82);
    backdrop-filter: blur(6px);
}

.course-modal-panel {
    position: relative;
    width: 100%;
    max-width: 52rem;
    max-height: 90vh;
    overflow-y: auto;
    background: rgba(5, 10, 24, 0.98);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 1.25rem;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 255, 136, 0.1);
    animation: courseModalIn 0.35s ease;
}

@keyframes courseModalIn {
    from { opacity: 0; transform: scale(0.95) translateY(12px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.course-modal-close {
    position: absolute;
    top: 0.85rem;
    right: 0.85rem;
    z-index: 5;
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: background 0.2s;
}

.course-modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.course-modal-grid {
    display: grid;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .course-modal-grid { grid-template-columns: 1fr 1.1fr; }
}

.course-modal-media {
    position: relative;
    min-height: 12rem;
    background: rgba(0, 0, 0, 0.3);
}

.course-modal-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 12rem;
    display: block;
}

.course-modal-icon-fallback {
    min-height: 14rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-modal-body {
    padding: 1.5rem;
}

.course-modal-title {
    font-size: 1.375rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.course-modal-subtitle {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 1rem;
    line-height: 1.55;
}

.course-modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

@media (max-width: 639px) {
    #courseGrid {
        gap: 0.65rem;
    }

    .course-card:has(.course-card-thumb img) .course-card-title {
        font-size: 0.75rem;
    }

    .course-card:has(.course-card-thumb img) .course-card-body {
        padding: 0.38rem 0.55rem 0.42rem;
    }

    .course-card:has(.course-card-thumb img) .course-price-amount {
        font-size: 0.8125rem;
    }

    .course-card-cta {
        font-size: 0.6875rem;
        padding: 0.35rem 0.5rem;
    }

    .course-quick-jump { gap: 0.35rem; }
    .course-quick-btn { min-width: 3.5rem; padding: 0.4rem; }
    .course-quick-btn-label { font-size: 0.5625rem; }
    .course-toolbar { flex-direction: column; align-items: stretch; }
    .course-card-footer { flex-wrap: wrap; }

    .course-modal {
        padding: 0;
        align-items: flex-end;
    }

    .course-modal-panel {
        max-height: 92vh;
        border-radius: 1.25rem 1.25rem 0 0;
        border-bottom: none;
    }

    .course-modal-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .course-modal-footer .course-card-cta,
    .course-modal-footer .course-btn-outline {
        width: 100%;
        justify-content: center;
    }
}

/* ── Enhanced card effects ── */
.course-card-glow {
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    opacity: 0;
    z-index: 0;
    pointer-events: none;
    transition: opacity 0.35s;
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.2), rgba(0, 180, 255, 0.15), transparent 60%);
}

.course-card:hover .course-card-glow { opacity: 1; }

.course-card--neon-green:hover { border-color: rgba(0, 255, 136, 0.35); }
.course-card--neon-cyan:hover,
.course-card--neon-blue:hover { border-color: rgba(0, 180, 255, 0.35); }
.course-card--neon-pink:hover { border-color: rgba(236, 72, 153, 0.35); }
.course-card--neon-purple:hover,
.course-card--neon-indigo:hover { border-color: rgba(147, 51, 234, 0.35); }
.course-card--neon-orange:hover { border-color: rgba(249, 115, 22, 0.35); }

.course-card:hover .course-thumb-icon {
    transform: scale(1.08) rotate(-4deg);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.35);
}

.course-thumb-icon {
    transition: transform 0.3s, box-shadow 0.3s;
}

.course-card:hover .course-title-icon {
    transform: scale(1.1);
}

.course-title-icon {
    transition: transform 0.25s;
}

.ref-product-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.course-meta-tag--cat {
    color: rgba(196, 181, 253, 0.85);
    border-color: rgba(147, 51, 234, 0.2);
    background: rgba(147, 51, 234, 0.08);
}

/* Compact mode extras */
.course-card-highlights--compact {
    margin-bottom: 0.65rem;
}

.course-card-tools--compact {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.85rem;
}

.course-tool-count {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.625rem;
    font-weight: 700;
    color: #00b4ff;
    padding: 0.2rem 0.5rem;
    border-radius: 9999px;
    background: rgba(0, 180, 255, 0.1);
    border: 1px solid rgba(0, 180, 255, 0.2);
}

.course-tool-chip--mini {
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
}

.course-tool-chip--mini span { display: none; }

.course-filter-scroll--compact {
    margin-bottom: 0;
    padding-left: 0;
    padding-right: 0;
}

.course-filter-bar--compact {
    gap: 0.45rem;
}

.course-catalog-controls--compact {
    margin-bottom: 1.75rem;
    padding: 1rem 1.1rem 1.05rem;
    border-radius: 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.course-catalog-controls-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
    flex-wrap: wrap;
}

.course-catalog-controls-label {
    margin: 0;
    font-size: 0.8125rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.72);
    letter-spacing: 0.02em;
}

.course-result-count--prominent {
    font-size: 0.875rem;
    font-weight: 700;
    color: #fff;
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.22);
}

.course-result-count--prominent i {
    color: #00ff88;
}

.course-filter-scroll--compact {
    position: relative;
    mask-image: linear-gradient(to right, transparent, #000 0.75rem, #000 calc(100% - 0.75rem), transparent);
}

@media (min-width: 1024px) {
    .course-filter-scroll--compact {
        mask-image: none;
    }

    .course-filter-bar--compact {
        flex-wrap: wrap;
        justify-content: center;
    }
}

.course-filter-bar--compact .course-filter-btn {
    min-height: 2.75rem;
    padding: 0.6rem 1rem;
    font-size: 0.8125rem;
}

.course-filter-bar--compact .course-filter-btn span {
    max-width: 11rem;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-filter-bar--compact .course-filter-btn.active {
    box-shadow: 0 0 18px rgba(0, 255, 136, 0.28);
}

.course-quick-jump--inline {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0.5rem;
    padding-bottom: 0.35rem;
    scrollbar-width: none;
    justify-content: flex-start;
}

.course-quick-jump--inline::-webkit-scrollbar { display: none; }

.course-toolbar--mini {
    justify-content: center;
    padding: 0.6rem 1rem;
    margin-bottom: 0.75rem;
}

.course-card--compact .course-thumb-preview {
    opacity: 1;
    min-height: 1.75rem;
    padding: 0.3rem 0.6rem;
}

.course-card--compact:hover .course-card-subtitle {
    color: rgba(255, 255, 255, 0.65);
}

.course-btn-ghost:active,
.course-card-cta:active {
    transform: scale(0.96);
}

.course-card-cta {
    transition: transform 0.2s, box-shadow 0.2s;
}

@keyframes courseIconPop {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.course-card:hover .course-hl-icon {
    animation: courseIconPop 0.5s ease;
}