.courses-page {
    background: var(--background);
}

.courses-header {
    max-width: 760px;
    margin-bottom: 38px;
}

.courses-header span {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--accent-hover);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1.4px;
}

.courses-header h1 {
    margin-bottom: 14px;
}

.courses-header p {
    max-width: 680px;
    margin-bottom: 0;
    font-size: 18px;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
}

.course-card {
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: 0.25s ease;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.course-card-image {
    position: relative;
    display: block;
    height: 220px;
    overflow: hidden;
    background: var(--primary);
}

.course-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}

.course-card:hover .course-card-image img {
    transform: scale(1.04);
}

.course-card-placeholder {
    display: flex;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text-light);
    font-size: 34px;
    font-weight: 800;
}

.course-card-placeholder::first-letter {
    color: var(--accent);
}

.course-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 7px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.7px;
}

.course-badge.free {
    background: var(--accent);
    color: var(--text-light);
}

.course-badge.paid {
    background: var(--primary);
    color: var(--text-light);
}

.course-card-content {
    padding: 24px;
}

.course-category {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-hover);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.8px;
    text-transform: uppercase;
}

.course-card h3 {
    margin-bottom: 12px;
    font-size: 21px;
    line-height: 1.3;
}

.course-card h3 a {
    color: var(--primary);
}

.course-card h3 a:hover {
    color: var(--accent-hover);
}

.course-description {
    min-height: 76px;
    margin-bottom: 18px;
    font-size: 15px;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

.course-meta span {
    padding: 5px 9px;
    background: var(--surface-soft);
    border-radius: 7px;
    color: var(--text-muted);
    font-size: 12px;
}

.course-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.course-price {
    color: var(--primary);
    font-size: 18px;
}

.course-price.free {
    color: var(--accent-hover);
}

.course-link {
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
}

.course-link:hover {
    color: var(--accent-hover);
}
.course-hero {
    padding: 70px 0;
    background: var(--primary-dark);
}

.course-hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 60px;
}

.course-back-link {
    display: inline-block;
    margin-bottom: 24px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 14px;
}

.course-back-link:hover {
    color: var(--accent);
}

.course-detail-category {
    display: block;
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1.2px;
    text-transform: uppercase;
}

.course-hero h1 {
    max-width: 760px;
    margin-bottom: 22px;
    color: var(--text-light);
    font-size: 52px;
    line-height: 1.1;
}

.course-detail-description {
    max-width: 700px;
    margin-bottom: 28px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 19px;
}

.course-detail-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.detail-badge {
    padding: 8px 12px;
    background: var(--surface);
    border-radius: 999px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}

.detail-badge-free {
    background: var(--accent);
    color: var(--text-light);
}

.detail-badge-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: rgba(255, 255, 255, 0.82);
}

.course-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.course-outline-btn {
    border: 1px solid rgba(255, 255, 255, 0.45);
    background: transparent;
    color: var(--text-light);
}

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

.course-hero-image img {
    display: block;
    width: 100%;
    max-height: 440px;
    object-fit: cover;
    border-radius: 24px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.28);
}

.course-detail-placeholder {
    display: flex;
    min-height: 390px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: linear-gradient(135deg, #173B59, #0A2236);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    text-align: center;
}

.course-detail-placeholder strong {
    color: var(--text-light);
    font-size: 56px;
}

.course-detail-placeholder strong span {
    color: var(--accent);
}

.course-detail-placeholder p {
    margin: 8px 0 0;
    color: rgba(255, 255, 255, 0.6);
}

.course-detail-main {
    background: var(--background);
}

.course-content-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
    gap: 34px;
}

.course-main-column {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.course-content-card,
.course-info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.course-content-card {
    padding: 38px;
}

.section-eyebrow {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--accent-hover);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1.3px;
}

.course-content-card h2 {
    margin-bottom: 20px;
}

.course-long-description p,
.module-description p {
    color: var(--text-muted);
}

.modules-intro {
    margin-bottom: 26px;
}

.module-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.module-card {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 18px;
    padding: 22px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.module-number {
    display: flex;
    width: 46px;
    height: 46px;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: 50%;
    color: var(--text-light);
    font-size: 16px;
    font-weight: 800;
}

.module-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}

.module-header h3 {
    margin: 0;
    font-size: 18px;
}

.module-header span {
    flex-shrink: 0;
    padding: 6px 9px;
    background: var(--accent-light);
    border-radius: 7px;
    color: var(--accent-hover);
    font-size: 12px;
    font-weight: 700;
}

.module-description {
    margin-top: 10px;
}

.module-description p:last-child {
    margin-bottom: 0;
}

.empty-modules {
    padding: 24px;
    background: var(--surface-soft);
    border-radius: var(--radius);
    color: var(--text-muted);
}

.course-sidebar {
    position: sticky;
    top: 105px;
}

.course-info-card {
    padding: 28px;
}

.course-info-card h3 {
    margin-bottom: 22px;
    font-size: 21px;
}

.course-info-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
}

.course-info-row span {
    color: var(--text-muted);
    font-size: 14px;
}

.course-info-row strong {
    color: var(--primary);
    text-align: right;
    font-size: 14px;
}

.course-info-row .green-text {
    color: var(--accent-hover);
}

.course-sidebar-button {
    width: 100%;
    margin-top: 24px;
}

.green-text {
    color: var(--accent-hover);
}

/* =========================================================
   COURSE BANNER LIGHTBOX
   ========================================================= */

.course-banner-clickable {
    cursor: zoom-in;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.course-banner-clickable:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.38);
}

.course-image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 40px;

    background: rgba(4, 18, 29, 0.88);
    backdrop-filter: blur(5px);

    opacity: 0;
    visibility: hidden;

    transition:
        opacity 0.25s ease,
        visibility 0.25s ease;
}

.course-image-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.course-image-lightbox-image {
    display: block;

    width: auto;
    height: auto;

    max-width: 94vw;
    max-height: 90vh;

    object-fit: contain;

    border-radius: 18px;

    box-shadow:
        0 35px 100px rgba(0, 0, 0, 0.55),
        0 0 0 1px rgba(255, 255, 255, 0.08);

    transform: scale(0.94);

    transition: transform 0.25s ease;
}

.course-image-lightbox.is-open .course-image-lightbox-image {
    transform: scale(1);
}

.course-image-lightbox-close {
    position: fixed;
    top: 24px;
    right: 30px;

    z-index: 10000;

    width: 48px;
    height: 48px;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 0;

    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;

    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;

    font-size: 34px;
    font-weight: 300;
    line-height: 1;

    cursor: pointer;

    transition:
        background 0.2s ease,
        transform 0.2s ease;
}

.course-image-lightbox-close:hover {
    background: var(--accent);
    transform: rotate(90deg);
}

body.lightbox-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .course-image-lightbox {
        padding: 20px;
    }

    .course-image-lightbox-image {
        max-width: 96vw;
        max-height: 85vh;
        border-radius: 12px;
    }

    .course-image-lightbox-close {
        top: 14px;
        right: 14px;

        width: 42px;
        height: 42px;

        font-size: 30px;
    }
}