/* ============================================
   COURSE DETAIL PAGE
   Layout-only tokens. Shared ink/surface/shadow/radius
   come from base.css so header/footer match landing.
   ============================================ */

:root {
    /* Aliases used throughout this file → base.css where available */
    --primary: var(--primary-color, #0a486f);
    --primary-dark: #073454;
    --primary-light: #0d5a94;
    --accent: #2563eb;
    --accent-soft: #eff6ff;
    --accent-border: #bfdbfe;

    --success: var(--success-color, #10b981);
    --warning: var(--warning-color, #f59e0b);
    --danger: var(--danger-color, #ef4444);

    --bg: var(--surface-soft, #f8fafc);
    --border: var(--border-soft, #e7ecf1);

    --radius: var(--radius-md, 14px);

    --transition: 220ms var(--ease-out-quart, cubic-bezier(0.25, 1, 0.5, 1));
    --transition-tactile: 280ms var(--ease-tactile, cubic-bezier(0.34, 1.56, 0.64, 1));

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 2.5rem;
    --space-8: 3rem;
}

/* ============================================
   PAGE CONTAINER
   ============================================ */
.external-course-detail-container {
    /* Same content width as landing / certificates (--page-width) */
    margin: 0 auto;
    width: var(--page-width);
    max-width: var(--page-max);
    padding: clamp(1.25rem, 2.5vw, 2.25rem) 0 clamp(2.5rem, 5vw, 4rem);
    background: transparent;
    min-height: calc(100vh - 200px);
    min-height: calc(100dvh - 200px);
    font-weight: 500;
}

/* ============================================
   BREADCRUMBS
   ============================================ */
.breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    color: var(--ink-500);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: var(--space-5);
    letter-spacing: 0.01em;
}

.breadcrumbs a {
    color: var(--ink-500);
    text-decoration: none;
    transition: color var(--transition);
}

.breadcrumbs a:hover {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumbs .separator {
    color: var(--ink-300);
    display: inline-flex;
    align-items: center;
    font-size: 0.65rem;
}

.breadcrumbs > span:last-child {
    color: var(--ink-700);
    font-weight: 700;
}

/* ============================================
   LAYOUT
   ============================================ */
.course-detail-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.95fr);
    gap: clamp(1.75rem, 3.5vw, 3rem);
    align-items: start;
}

/* ============================================
   LEFT CONTENT (no heavy card; content-first)
   ============================================ */
.course-details-panel {
    min-width: 0;
    animation: course-detail-rise 480ms var(--ease-out-quart, cubic-bezier(0.25, 1, 0.5, 1)) both;
}

@keyframes course-detail-rise {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.course-provider {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: var(--space-4);
    padding: 0.25rem 0.75rem 0.25rem 0.25rem;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(16, 40, 62, 0.08);
    border-radius: 999px;
    box-shadow: none;
    transition: border-color var(--transition), background var(--transition);
}

.course-provider:hover {
    box-shadow: none;
    border-color: rgba(10, 72, 111, 0.22);
    background: #fff;
}

.provider-logo-small {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border-soft);
}

.provider-name-small {
    font-size: 0.8rem;
    color: var(--ink-700);
    font-weight: 700;
    letter-spacing: 0.01em;
}

.course-title-large {
    font-size: clamp(1.7rem, 3.4vw, 2.4rem);
    font-weight: 800;
    color: var(--ink-900);
    line-height: 1.18;
    letter-spacing: -0.032em;
    margin: 0 0 var(--space-4);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.course-description {
    color: var(--ink-600);
    line-height: 1.75;
    font-size: 1rem;
    font-weight: 500;
    max-width: 68ch;
    margin: 0 0 var(--space-6);
    padding-top: var(--space-2);
}

/* ============================================
   SECTION BLOCKS
   ============================================ */
.course-extra-section {
    margin: 0 0 var(--space-6);
    max-width: 70ch;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink-900);
    margin: 0 0 var(--space-4);
    letter-spacing: -0.02em;
}

/* Learning outcomes list */
.course-list-items {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.85rem;
}

.course-list-items li {
    position: relative;
    padding-left: 1.65rem;
    color: var(--ink-650, var(--ink-700));
    line-height: 1.6;
    font-size: 0.935rem;
    font-weight: 500;
}

.course-list-items li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.42rem;
    width: 1rem;
    height: 1rem;
    border-radius: 999px;
    background: rgba(10, 72, 111, 0.08);
    border: 1px solid rgba(10, 72, 111, 0.16);
}

.course-list-items li::after {
    content: "";
    position: absolute;
    left: 0.28rem;
    top: 0.68rem;
    width: 0.42rem;
    height: 0.24rem;
    border-left: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    transform: rotate(-45deg);
}

.course-list-items li strong {
    color: var(--ink-900);
    font-weight: 600;
    margin-right: 0.25rem;
}

/* Skills chips */
.skills-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.skill-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--ink-700);
    font-size: 0.84rem;
    font-weight: 600;
    transition: all var(--transition-tactile);
}

.skill-chip:hover {
    border-color: var(--accent-border);
    background: var(--accent-soft);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xs);
}

/* ============================================
   INSTRUCTOR
   ============================================ */
.instructor-info {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    width: fit-content;
    max-width: 100%;
    margin-bottom: var(--space-4);
    padding: 0.45rem 0.85rem 0.45rem 0.45rem;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(16, 40, 62, 0.08);
    border-radius: 999px;
    box-shadow: none;
    transition: border-color var(--transition), background var(--transition);
    flex-wrap: nowrap;
}

.instructor-info:hover {
    box-shadow: none;
    background: #fff;
    border-color: rgba(10, 72, 111, 0.18);
}

.instructor-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 0.82rem;
    flex-shrink: 0;
    letter-spacing: 0.04em;
}

.instructor-details {
    display: flex;
    flex-direction: column;
    gap: 0;
    min-width: 0;
    padding-right: 0.25rem;
}

.instructor-label {
    font-size: 0.68rem;
    color: var(--ink-400);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    line-height: 1.2;
}

.instructor-name {
    font-size: 0.9rem;
    color: var(--ink-900);
    font-weight: 700;
    text-decoration: none;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.instructor-name:hover {
    color: var(--primary);
    text-decoration: none;
}

.instructor-title {
    font-size: 0.78rem;
    color: var(--ink-500);
}

/* ============================================
   COURSE META (duration, pace, rating)
   ============================================ */
.course-detail-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0;
    margin: 0 0 var(--space-5);
    padding: 0.65rem 0;
    border-top: 1px solid rgba(16, 40, 62, 0.07);
    border-bottom: 1px solid rgba(16, 40, 62, 0.07);
    color: var(--ink-600);
    font-size: 0.875rem;
    font-weight: 600;
}

.course-detail-meta__item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0 0.85rem;
    border-right: 1px solid rgba(16, 40, 62, 0.1);
    line-height: 1.3;
}

.course-detail-meta__item:first-child {
    padding-left: 0;
}

.course-detail-meta__item:last-child {
    border-right: 0;
    padding-right: 0;
}

.course-detail-meta__item i {
    color: var(--primary);
    font-size: 0.9rem;
    opacity: 0.85;
}

.course-detail-meta__rating i {
    color: #eab308;
    opacity: 1;
}

.course-detail-meta__muted {
    color: var(--ink-400);
    font-weight: 500;
}

.course-detail-meta__price {
    color: var(--success);
    font-weight: 700;
    align-items: flex-start;
}

.course-detail-meta__price i {
    color: var(--success);
    margin-top: 0.15rem;
}

.course-detail-meta__price-stack {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
    line-height: 1.25;
}

.course-detail-meta__price-regular {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--ink-400);
    text-decoration: line-through;
}

.course-detail-meta__price-teaser {
    font-size: 0.78rem;
    font-weight: 600;
    color: #0a486f;
}

/* ============================================
   ENROLL SECTION
   ============================================ */
.enroll-section {
    position: relative;
    margin-top: 0;
    margin-bottom: var(--space-7);
    width: 100%;
    max-width: 360px;
    background: #fff;
    border: 1px solid rgba(16, 40, 62, 0.08);
    border-radius: 16px;
    padding: 1.35rem 1.35rem 1.15rem;
    box-shadow:
        0 1px 2px rgba(16, 40, 62, 0.04),
        0 8px 24px rgba(16, 40, 62, 0.06);
    overflow: hidden;
}

.btn-enroll-large {
    width: 100%;
    padding: 0.95rem 1.15rem;
    background: var(--primary);
    color: #fff;
    border: 1px solid var(--primary);
    border-radius: 10px;
    font-size: 0.98rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform var(--transition-tactile), box-shadow var(--transition), background var(--transition);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.15rem;
    text-align: center;
    letter-spacing: 0.01em;
    font-family: inherit;
    appearance: none;
    -webkit-appearance: none;
    box-shadow: 0 1px 2px rgba(10, 72, 111, 0.18);
}

.btn-enroll-large:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(10, 72, 111, 0.22);
}

.btn-enroll-large:disabled,
.btn-enroll-large.is-loading {
    opacity: 0.85;
    cursor: wait;
    transform: none;
    box-shadow: none;
}

.btn-enroll-large:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-enroll-large .btn-subtext {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    margin-top: 0.3rem;
    opacity: 0.9;
}

.disabled-enroll-btn,
.disabled-enroll-btn:hover {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--ink-400);
    border-color: var(--ink-400);
    color: #fff;
    transform: none;
    box-shadow: none;
}

.paid-course-enroll {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0;
}

.course-price {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--ink-900);
    margin: 0 0 1rem;
    text-align: left;
    letter-spacing: -0.03em;
    line-height: 1.15;
}

.course-price__regular {
    display: inline;
    margin-left: 0.45rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink-400);
    text-decoration: line-through;
    letter-spacing: 0;
}

.course-price__scholarship-badge {
    display: inline-block;
    margin-top: 0.4rem;
    margin-left: 0;
    font-size: 0.7rem;
    font-weight: 700;
    color: #0a486f;
    background: rgba(10, 72, 111, 0.08);
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    vertical-align: middle;
}

.course-price__teaser {
    display: block;
    margin-top: 0.35rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: -0.01em;
}

.institution-covered-enroll {
    margin-bottom: 0.25rem;
}

.institution-covered-badge {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1rem 1.05rem;
    margin-bottom: 1rem;
    border-radius: 14px;
    background: linear-gradient(135deg, #eff6ff 0%, #eef2ff 100%);
    border: 1px solid #bfdbfe;
}

.institution-covered-badge__icon {
    flex-shrink: 0;
    width: 2.35rem;
    height: 2.35rem;
    border-radius: 10px;
    background: #fff;
    color: #2563eb;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    border: 1px solid #dbeafe;
}

.institution-covered-badge__text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.institution-covered-badge__label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #3730a3;
}

.institution-covered-badge__school {
    font-size: 1.05rem;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.25;
}

.institution-covered-badge__hint {
    font-size: 0.82rem;
    color: #475569;
    line-height: 1.4;
}

.paid-course-enroll__hint a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.paid-course-enroll__hint a:hover {
    text-decoration: underline;
}

.paid-course-enroll__alt-label {
    margin: var(--space-3) 0 var(--space-2);
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-500);
}

.paid-course-enroll__divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.95rem 0;
    color: var(--ink-400);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.paid-course-enroll__divider::before,
.paid-course-enroll__divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: rgba(16, 40, 62, 0.1);
}

.paid-course-enroll__hint {
    margin: 0.85rem 0 0;
    text-align: center;
    font-size: 0.8125rem;
    line-height: 1.45;
    color: var(--ink-500);
    font-weight: 500;
}

.umunota-pay-status {
    margin-top: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-sm);
    border: 1px solid #a7f3d0;
    background: #ecfdf5;
    text-align: center;
}

.umunota-pay-status__spinner {
    width: 28px;
    height: 28px;
    margin: 0 auto var(--space-2);
    border: 3px solid #a7f3d0;
    border-top-color: #059669;
    border-radius: 50%;
    animation: umunota-spin 0.8s linear infinite;
}

.umunota-pay-status__title {
    margin: 0 0 0.25rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: #065f46;
}

.umunota-pay-status__text {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.4;
    color: #047857;
}

.umunota-pay-error {
    margin: var(--space-2) 0 0;
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius-sm);
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    font-size: 0.875rem;
    line-height: 1.4;
    text-align: center;
}

@keyframes umunota-spin {
    to { transform: rotate(360deg); }
}

.btn-enroll-secondary {
    width: 100%;
    padding: 0.78rem 1.15rem;
    margin-top: 0;
    background: transparent;
    color: var(--primary);
    border: 1.5px solid rgba(10, 72, 111, 0.28);
    border-radius: 10px;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    display: block;
    text-align: center;
    letter-spacing: 0.01em;
}

.btn-enroll-secondary:hover {
    background: rgba(10, 72, 111, 0.05);
    color: var(--primary-dark);
    border-color: var(--primary);
    text-decoration: none;
    transform: none;
    box-shadow: none;
}

.enroll-code-form {
    width: 100%;
}

.form-field {
    margin-bottom: var(--space-3);
}

.form-field label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    color: var(--ink-700);
    font-size: 0.875rem;
}

.enroll-code-form .form-control {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: var(--surface);
    color: var(--ink-800);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.enroll-code-form .form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.enrollment-info-card {
    text-align: center;
    padding: var(--space-3);
    border-radius: var(--radius-sm);
    background: var(--surface-soft);
    border: 1px solid var(--border);
}

.enrollment-info-card p {
    color: var(--ink-600);
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
}

.enrollment-info-card p:last-child {
    margin-bottom: 0;
}

.enrollment-contact {
    font-size: 0.85rem;
    color: var(--ink-500);
}

.enrollment-date {
    text-align: center;
    margin-top: var(--space-2);
    color: var(--ink-500);
    font-size: 0.85rem;
}

.enrollment-count {
    text-align: center;
    margin-top: 1rem;
    padding-top: 0.9rem;
    border-top: 1px solid rgba(16, 40, 62, 0.07);
    color: var(--ink-500);
    font-size: 0.8125rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    font-weight: 600;
}

.enrollment-count i {
    color: var(--primary);
    opacity: 0.75;
    font-size: 0.9rem;
}

/* ============================================
   RIGHT PANEL (image + syllabus card)
   ============================================ */
.course-image-panel {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    animation: course-detail-rise 560ms 60ms var(--ease-out-quart, cubic-bezier(0.25, 1, 0.5, 1)) both;
}

.course-image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, #eef2f5 0%, #e2e8f0 100%);
    border-radius: 16px;
    box-shadow:
        0 1px 2px rgba(16, 40, 62, 0.04),
        0 10px 28px rgba(16, 40, 62, 0.08);
    overflow: hidden;
    border: 1px solid rgba(16, 40, 62, 0.06);
    transition: box-shadow var(--transition);
}

.course-image-container::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(
        110deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.5) 45%,
        rgba(255, 255, 255, 0) 90%
    );
    background-size: 200% 100%;
    animation: course-media-shimmer 1.4s ease-in-out infinite;
    opacity: 1;
    transition: opacity 0.35s ease;
}

.course-image-container:has(.course-image-bg.is-loaded)::after,
.course-image-container:has(.course-image-placeholder)::after {
    opacity: 0;
    animation: none;
}

.course-image-container:hover {
    box-shadow: var(--shadow-lg);
}

.course-image-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    content-visibility: auto;
    opacity: 0;
    filter: blur(12px);
    transform: scale(1.03);
    transition: opacity 0.5s ease, filter 0.5s ease, transform 0.5s ease;
}

.course-image-bg.is-loaded {
    opacity: 1;
    filter: none;
    transform: scale(1);
}

@keyframes course-media-shimmer {
    0% { background-position: 120% 0; }
    100% { background-position: -80% 0; }
}

@media (prefers-reduced-motion: reduce) {
    .course-image-container::after {
        animation: none;
        opacity: 0;
    }
    .course-image-bg {
        opacity: 1;
        filter: none;
        transform: none;
        transition: none;
    }
}

.course-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e0f2fe 0%, #f0f9ff 60%, #ffffff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.course-image-placeholder .placeholder-icon {
    font-size: clamp(3rem, 8vw, 5rem);
    color: rgba(37, 99, 235, 0.18);
}

.logo-overlay {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
}

.logo-overlay img {
    max-width: 80px;
    height: auto;
    opacity: 0.85;
}

.side-panel-card {
    background: #fff;
    border: 1px solid rgba(16, 40, 62, 0.08);
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(16, 40, 62, 0.04);
    padding: 1.25rem 1.35rem;
    transition: box-shadow var(--transition);
}

.side-panel-card:hover {
    box-shadow: 0 4px 14px rgba(16, 40, 62, 0.06);
}

.media-preview-card .section-title {
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-soft);
}

.trailer-embed-wrap {
    position: relative;
    width: 100%;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #000;
    margin-bottom: var(--space-3);
    border: 1px solid var(--border-soft);
}

.trailer-embed-wrap iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 0;
    display: block;
}

.preview-gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
}

.preview-gallery-item {
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-soft);
    background: linear-gradient(135deg, #eef2f5 0%, #e2e8f0 100%);
    display: block;
    position: relative;
}

.preview-gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(
        110deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.5) 45%,
        rgba(255, 255, 255, 0) 90%
    );
    background-size: 200% 100%;
    animation: course-media-shimmer 1.4s ease-in-out infinite;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.preview-gallery-item:has(img.is-loaded)::after {
    opacity: 0;
    animation: none;
}

.preview-gallery-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    opacity: 0;
    filter: blur(8px);
    transition: transform var(--transition), opacity 0.4s ease, filter 0.4s ease;
}

.preview-gallery-item img.is-loaded {
    opacity: 1;
    filter: none;
}

.preview-gallery-item:hover img.is-loaded {
    transform: scale(1.03);
}

@media (prefers-reduced-motion: reduce) {
    .preview-gallery-item::after {
        animation: none;
        opacity: 0;
    }
    .preview-gallery-item img {
        opacity: 1;
        filter: none;
        transition: none;
    }
}

.syllabus-side-card {
    padding: 1.15rem 1.25rem 0.85rem;
    border-color: rgba(16, 40, 62, 0.08);
    box-shadow: 0 1px 3px rgba(16, 40, 62, 0.04);
    border-radius: 16px;
}

.syllabus-side-card__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.15rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid rgba(16, 40, 62, 0.07);
}

.syllabus-side-card .section-title {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--ink-900);
}

.syllabus-side-card__count {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--ink-400);
    white-space: nowrap;
}

/* Quiet numbered list — no nested cards */
.syllabus-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    counter-reset: none;
}

.syllabus-item {
    display: grid;
    grid-template-columns: 1.75rem minmax(0, 1fr);
    gap: 0.7rem;
    align-items: start;
    margin: 0;
    padding: 0.8rem 0.1rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    border-bottom: 1px solid rgba(16, 40, 62, 0.06);
    transition: background-color 160ms ease;
}

.syllabus-item:last-child {
    border-bottom: 0;
}

.syllabus-item:hover {
    background: transparent;
    border-color: rgba(16, 40, 62, 0.06);
    transform: none;
}

.syllabus-item:hover .syllabus-title {
    color: var(--primary);
}

.syllabus-position {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    margin-top: 0.15rem;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--ink-300);
    font-size: 0.75rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
    text-transform: none;
    white-space: nowrap;
    line-height: 1.4;
}

.syllabus-body {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.syllabus-title {
    color: var(--ink-800);
    font-weight: 700;
    font-size: 0.9rem;
    line-height: 1.4;
    letter-spacing: -0.01em;
    transition: color 160ms ease;
}

.syllabus-description {
    margin: 0;
    color: var(--ink-500);
    line-height: 1.45;
    font-size: 0.8rem;
    font-weight: 500;
}

.syllabus-more-note {
    margin: 0.35rem 0 0;
    color: var(--ink-400);
    font-size: 0.8rem;
    text-align: center;
    padding-top: 0.85rem;
    border-top: 1px solid rgba(16, 40, 62, 0.07);
}


/* Sticky right panel on desktop */
@media (min-width: 1200px) {
    .course-image-panel {
        position: sticky;
        top: calc(88px + var(--space-5));
    }
}

/* ============================================
   SUMMARY BAR
   ============================================ */
.course-summary-bar {
    background: transparent;
    border: none;
    padding: 0;
    margin-top: clamp(2rem, 4vw, 3rem);
    box-shadow: none;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.85rem;
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    padding: 1.15rem 1.2rem;
    position: relative;
    background: #fff;
    border: 1px solid rgba(16, 40, 62, 0.08);
    border-radius: 14px;
    box-shadow: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.summary-item:hover {
    transform: none;
    box-shadow: 0 4px 14px rgba(16, 40, 62, 0.05);
    border-color: rgba(10, 72, 111, 0.18);
}

.summary-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    margin-bottom: 0.65rem;
    background: rgba(10, 72, 111, 0.07);
    color: var(--primary);
    font-size: 0.95rem;
    transition: none;
}

.summary-item:hover .summary-icon {
    transform: none;
}

.summary-value {
    font-size: clamp(1.15rem, 2vw, 1.35rem);
    font-weight: 700;
    color: var(--ink-900);
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.summary-label {
    font-size: 0.8rem;
    color: var(--ink-700);
    margin-bottom: 0.2rem;
    font-weight: 600;
}

.summary-description {
    font-size: 0.75rem;
    color: var(--ink-400);
    line-height: 1.45;
    font-weight: 500;
}

.stars {
    color: #eab308;
    font-size: 0.9rem;
    margin-bottom: 0.15rem;
    letter-spacing: 0.04em;
}

/* ============================================
   COURSE REVIEW UI
   ============================================ */
.course-review-card {
    padding: var(--space-6);
}

.course-review-card .section-title {
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-soft);
}

.course-review-form {
    margin-bottom: var(--space-5);
}

.course-review-field {
    margin-bottom: var(--space-3);
}

.course-review-label {
    display: block;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
    color: var(--ink-500);
    margin-bottom: var(--space-2);
}

.course-review-rating-group {
    display: flex;
    flex-direction: row-reverse;
    justify-content: flex-end;
    gap: 0.25rem;
}

.course-review-rating-option {
    margin: 0;
}

.course-review-rating-input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.course-review-rating-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--ink-400);
    padding: 0;
    font-size: 1.35rem;
    cursor: pointer;
    transition: all var(--transition);
}

.course-review-rating-pill i {
    color: currentColor;
    font-size: 1.05rem;
}

.course-review-rating-option:hover .course-review-rating-pill {
    color: var(--warning);
}

.course-review-rating-option:hover ~ .course-review-rating-option .course-review-rating-pill {
    color: var(--warning);
}

.course-review-rating-option:has(.course-review-rating-input:checked) .course-review-rating-pill,
.course-review-rating-option:has(.course-review-rating-input:checked) ~ .course-review-rating-option .course-review-rating-pill {
    color: var(--warning);
}

.course-review-rating-option:focus-within .course-review-rating-pill {
    outline: 2px solid rgba(10, 72, 111, 0.25);
}

.course-review-textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink-800);
    min-height: 110px;
    padding: 0.7rem 0.8rem;
    resize: vertical;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.course-review-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.course-review-submit-btn {
    border: 1px solid var(--primary);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 0.62rem 1.1rem;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: var(--shadow-xs);
    transition: transform var(--transition-tactile), box-shadow var(--transition);
}

.course-review-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.course-review-locked-note {
    margin: 0 0 var(--space-4);
    color: var(--ink-500);
    font-size: 0.88rem;
    line-height: 1.5;
    padding: var(--space-3);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-soft);
}

.course-review-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.course-review-item {
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    background: var(--surface-soft);
    padding: var(--space-4);
    transition: box-shadow var(--transition);
}

.course-review-item:hover {
    box-shadow: var(--shadow-xs);
}

.course-review-item-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: 0.35rem;
}

.course-review-item-head strong {
    color: var(--ink-900);
    font-size: 0.88rem;
}

.course-review-score {
    color: var(--warning);
    font-size: 0.82rem;
    font-weight: 700;
}

.course-review-text {
    margin: 0 0 0.2rem;
    color: var(--ink-700);
    font-size: 0.88rem;
    line-height: 1.5;
}

.course-review-text.is-muted {
    color: var(--ink-500);
}

.course-review-date {
    color: var(--ink-500);
    font-size: 0.76rem;
}

.course-review-empty {
    margin: 0;
    color: var(--ink-500);
    font-size: 0.88rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1199px) {
    .course-detail-layout {
        grid-template-columns: 1fr;
    }

    .course-image-panel {
        order: -1;
        position: static;
    }

    .course-image-container {
        aspect-ratio: 16 / 9;
    }

    .course-summary-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }

    .enroll-section {
        max-width: 100%;
    }
}

@media (max-width: 991px) {
    .external-course-detail-container {
        padding: 1rem 0;
    }

    .course-image-container {
        aspect-ratio: 16 / 9;
    }

    .enroll-section {
        display: flex;
        flex-direction: column;
    }
}

@media (max-width: 767px) {
    .summary-item {
        padding: var(--space-3) var(--space-4);
    }

    .course-summary-bar {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3);
    }

    .summary-description {
        display: none;
    }

    .breadcrumbs {
        font-size: 0.8rem;
    }

    .instructor-info {
        margin-bottom: var(--space-4);
        max-width: 100%;
    }

    .instructor-avatar {
        width: 34px;
        height: 34px;
        font-size: 0.8rem;
    }

    .course-detail-meta__item {
        border-right: 0;
        padding: 0.2rem 0.7rem 0.2rem 0;
    }
}

@media (max-width: 480px) {
    .external-course-detail-container {
        padding: 0.75rem 0;
    }

    .course-detail-layout {
        gap: var(--space-4);
    }

    .course-provider {
        margin-bottom: var(--space-3);
    }

    .provider-logo-small {
        width: 24px;
        height: 24px;
    }

    .course-image-placeholder .placeholder-icon {
        font-size: 2.5rem;
    }

    .logo-overlay img {
        max-width: 60px;
    }

    .summary-value {
        font-size: 1.1rem;
    }

    .btn-enroll-large {
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
    }

    .enroll-section {
        margin-top: var(--space-5);
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .btn-enroll-large,
    .skill-chip,
    .syllabus-item {
        transition: none;
    }

    .btn-enroll-large:hover,
    .syllabus-item:hover {
        transform: none;
    }

    .course-details-panel,
    .course-image-panel {
        animation: none;
    }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
    .external-course-detail-container {
        background: #fff;
        padding: 1rem;
        max-width: 100%;
    }

    .course-summary-bar,
    .side-panel-card,
    .enroll-section,
    .course-image-container,
    .instructor-info {
        box-shadow: none;
        break-inside: avoid;
    }

    .btn-enroll-large {
        display: none;
    }

    .course-image-panel {
        position: static;
    }
}