:root {
    --ahu-bg: #f6f8fb;
    --ahu-surface: #ffffff;
    --ahu-surface-soft: #f9fafb;
    --ahu-primary: #0f766e;
    --ahu-primary-dark: #115e59;
    --ahu-primary-soft: #ccfbf1;
    --ahu-accent: #f59e0b;
    --ahu-text: #101828;
    --ahu-muted: #667085;
    --ahu-border: #e4e7ec;
    --ahu-danger: #b42318;
    --ahu-radius-xl: 28px;
    --ahu-radius-lg: 20px;
    --ahu-radius-md: 14px;
    --ahu-shadow: 0 24px 80px rgba(16, 24, 40, 0.12);
    --ahu-shadow-soft: 0 16px 40px rgba(16, 24, 40, 0.08);
}

.ahu-course-page {
    background:
        radial-gradient(circle at top right, rgba(15, 118, 110, 0.16), transparent 34%),
        radial-gradient(circle at top left, rgba(245, 158, 11, 0.12), transparent 32%),
        var(--ahu-bg);
    color: var(--ahu-text);
    font-family: inherit;
    line-height: 1.9;
    overflow: hidden;
}

.ahu-course-page * {
    box-sizing: border-box;
}

.ahu-container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.ahu-course-hero {
    padding: 64px 0 34px;
}

.ahu-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) 420px;
    gap: 32px;
    align-items: center;
}

.ahu-hero-content {
    padding: 20px 0;
}

.ahu-kicker {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.ahu-kicker span {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 6px 14px;
    border: 1px solid rgba(15, 118, 110, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.76);
    color: var(--ahu-primary-dark);
    font-size: 13px;
    font-weight: 800;
    backdrop-filter: blur(12px);
}

.ahu-course-title {
    margin: 0;
    color: var(--ahu-text);
    font-size: clamp(34px, 5vw, 58px);
    font-weight: 950;
    line-height: 1.25;
    letter-spacing: -1px;
}

.ahu-course-excerpt {
    max-width: 760px;
    margin: 22px 0 0;
    color: var(--ahu-muted);
    font-size: 18px;
    line-height: 2;
}

.ahu-course-meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-top: 30px;
}

.ahu-meta-item {
    padding: 16px;
    border: 1px solid rgba(228, 231, 236, 0.9);
    border-radius: var(--ahu-radius-md);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 10px 30px rgba(16, 24, 40, 0.04);
}

.ahu-meta-item strong {
    display: block;
    color: var(--ahu-text);
    font-size: 17px;
    font-weight: 900;
    line-height: 1.5;
}

.ahu-meta-item span {
    display: block;
    margin-top: 4px;
    color: var(--ahu-muted);
    font-size: 13px;
}

.ahu-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.ahu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 12px 22px;
    border-radius: 16px;
    border: 1px solid transparent;
    text-decoration: none;
    font-size: 15px;
    font-weight: 900;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    cursor: pointer;
}

.ahu-btn:hover {
    transform: translateY(-2px);
    text-decoration: none;
}

.ahu-btn-primary {
    background: linear-gradient(135deg, var(--ahu-primary), var(--ahu-primary-dark));
    color: #ffffff !important;
    box-shadow: 0 18px 34px rgba(15, 118, 110, 0.25);
}

.ahu-btn-secondary {
    border-color: rgba(15, 118, 110, 0.22);
    background: rgba(255, 255, 255, 0.82);
    color: var(--ahu-primary-dark) !important;
}

.ahu-btn-full {
    width: 100%;
}

.ahu-trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.ahu-trust-row span {
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(16, 24, 40, 0.06);
    color: #344054;
    font-size: 13px;
    font-weight: 800;
}

.ahu-course-card {
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--ahu-radius-xl);
    background: rgba(255, 255, 255, 0.88);
    box-shadow: var(--ahu-shadow);
    overflow: hidden;
    backdrop-filter: blur(18px);
}

.ahu-preview-box {
    position: relative;
    aspect-ratio: 16 / 10;
    background: #101828;
    overflow: hidden;
}

.ahu-preview-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transform: scale(1.02);
}

.ahu-preview-box::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(16, 24, 40, 0.54), transparent 56%);
}

.ahu-preview-badge {
    position: absolute;
    right: 18px;
    bottom: 18px;
    z-index: 2;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--ahu-primary-dark);
    font-size: 13px;
    font-weight: 950;
}

.ahu-card-body {
    padding: 22px;
}

.ahu-price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding-bottom: 18px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--ahu-border);
}

.ahu-price-row span {
    color: var(--ahu-muted);
    font-weight: 800;
}

.ahu-price-row strong {
    color: var(--ahu-text);
    font-size: 20px;
    font-weight: 950;
}

.ahu-enroll-action {
    margin-bottom: 18px;
}

.ahu-enroll-action .tutor-btn,
.ahu-enroll-action button,
.ahu-enroll-action input[type="submit"] {
    width: 100%;
    min-height: 52px;
    border-radius: 16px !important;
    background: linear-gradient(135deg, var(--ahu-primary), var(--ahu-primary-dark)) !important;
    color: #ffffff !important;
    border: 0 !important;
    font-weight: 900 !important;
    box-shadow: 0 18px 34px rgba(15, 118, 110, 0.25);
}

.ahu-card-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ahu-card-list li {
    position: relative;
    padding: 9px 22px 9px 0;
    color: #475467;
    font-size: 14px;
    font-weight: 700;
}

.ahu-card-list li::before {
    content: "";
    position: absolute;
    right: 0;
    top: 19px;
    width: 8px;
    height: 8px;
    border-radius: 99px;
    background: var(--ahu-primary);
}

.ahu-policy-strip {
    padding: 20px 0 34px;
}

.ahu-policy-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.ahu-policy-grid > div {
    padding: 18px;
    border: 1px solid rgba(180, 35, 24, 0.14);
    border-radius: var(--ahu-radius-lg);
    background: rgba(255, 255, 255, 0.8);
    box-shadow: var(--ahu-shadow-soft);
}

.ahu-policy-grid strong {
    display: block;
    color: var(--ahu-danger);
    font-size: 15px;
    font-weight: 950;
}

.ahu-policy-grid span {
    display: block;
    margin-top: 6px;
    color: var(--ahu-muted);
    font-size: 13px;
    line-height: 1.8;
}

.ahu-main-section {
    padding: 34px 0 80px;
}

.ahu-content-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 26px;
    align-items: start;
}

.ahu-left-content {
    display: grid;
    gap: 20px;
}

.ahu-panel,
.ahu-sticky-box,
.ahu-mini-policy {
    border: 1px solid var(--ahu-border);
    border-radius: var(--ahu-radius-xl);
    background: var(--ahu-surface);
    box-shadow: var(--ahu-shadow-soft);
}

.ahu-panel {
    padding: 28px;
}

.ahu-section-heading {
    margin-bottom: 20px;
}

.ahu-section-heading span {
    display: inline-flex;
    margin-bottom: 8px;
    color: var(--ahu-primary);
    font-size: 13px;
    font-weight: 950;
}

.ahu-section-heading h2 {
    margin: 0;
    color: var(--ahu-text);
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 950;
    line-height: 1.45;
}

.ahu-rich-content {
    color: #344054;
    font-size: 16px;
}

.ahu-rich-content p {
    margin: 0 0 16px;
}

.ahu-rich-content h2,
.ahu-rich-content h3,
.ahu-rich-content h4 {
    color: var(--ahu-text);
    font-weight: 950;
    line-height: 1.5;
}

.ahu-rich-content ul,
.ahu-rich-content ol {
    padding-right: 22px;
}

.ahu-curriculum-wrap {
    overflow: hidden;
}

.ahu-curriculum-wrap .tutor-accordion-item,
.ahu-curriculum-wrap .tutor-course-topic {
    border-radius: 16px !important;
    border-color: var(--ahu-border) !important;
    overflow: hidden;
}

.ahu-feature-list {
    display: grid;
    gap: 12px;
}

.ahu-feature-list > div,
.ahu-feature-list li {
    position: relative;
    padding: 14px 44px 14px 16px;
    border: 1px solid var(--ahu-border);
    border-radius: 16px;
    background: var(--ahu-surface-soft);
    color: #344054;
    font-weight: 750;
}

.ahu-feature-list > div::before,
.ahu-feature-list li::before {
    content: "✓";
    position: absolute;
    right: 14px;
    top: 14px;
    width: 22px;
    height: 22px;
    border-radius: 99px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--ahu-primary-soft);
    color: var(--ahu-primary-dark);
    font-size: 13px;
    font-weight: 950;
}

.ahu-feature-list-green > div::before,
.ahu-feature-list-green li::before {
    background: #dcfce7;
    color: #166534;
}

.ahu-rules {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.ahu-rules > div {
    padding: 18px;
    border-radius: 18px;
    border: 1px solid rgba(180, 35, 24, 0.12);
    background: #fff7f5;
}

.ahu-rules strong {
    display: block;
    color: var(--ahu-danger);
    font-size: 15px;
    font-weight: 950;
    margin-bottom: 8px;
}

.ahu-rules p {
    margin: 0;
    color: #667085;
    font-size: 14px;
    line-height: 1.9;
}

.ahu-faq {
    display: grid;
    gap: 12px;
}

.ahu-faq details {
    border: 1px solid var(--ahu-border);
    border-radius: 16px;
    background: var(--ahu-surface-soft);
    overflow: hidden;
}

.ahu-faq summary {
    padding: 16px 18px;
    color: var(--ahu-text);
    font-weight: 950;
    cursor: pointer;
}

.ahu-faq p {
    margin: 0;
    padding: 0 18px 18px;
    color: var(--ahu-muted);
    font-size: 14px;
}

.ahu-sidebar {
    display: grid;
    gap: 18px;
}

.ahu-sticky-box {
    position: sticky;
    top: 24px;
    padding: 22px;
}

.ahu-instructor-card {
    display: flex;
    gap: 12px;
    align-items: center;
}

.ahu-avatar {
    width: 54px;
    height: 54px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--ahu-primary), var(--ahu-accent));
    color: #ffffff;
    font-size: 22px;
    font-weight: 950;
}

.ahu-instructor-card span {
    display: block;
    color: var(--ahu-muted);
    font-size: 13px;
    font-weight: 800;
}

.ahu-instructor-card strong {
    display: block;
    color: var(--ahu-text);
    font-size: 16px;
    font-weight: 950;
}

.ahu-sticky-box p {
    margin: 16px 0 0;
    color: var(--ahu-muted);
    font-size: 14px;
    line-height: 1.9;
}

.ahu-sidebar-divider {
    height: 1px;
    margin: 18px 0;
    background: var(--ahu-border);
}

.ahu-side-info {
    display: grid;
    gap: 10px;
    margin-bottom: 18px;
}

.ahu-side-info > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--ahu-border);
}

.ahu-side-info span {
    color: var(--ahu-muted);
    font-size: 14px;
    font-weight: 800;
}

.ahu-side-info strong {
    color: var(--ahu-text);
    font-size: 14px;
    font-weight: 950;
}

.ahu-mini-policy {
    padding: 20px;
}

.ahu-mini-policy strong {
    display: block;
    margin-bottom: 12px;
    color: var(--ahu-text);
    font-size: 16px;
    font-weight: 950;
}

.ahu-mini-policy span {
    display: block;
    margin-top: 8px;
    padding: 10px 12px;
    border-radius: 12px;
    background: #fff7ed;
    color: #9a3412;
    font-size: 13px;
    font-weight: 900;
}

@media (max-width: 1024px) {
    .ahu-hero-grid,
    .ahu-content-grid {
        grid-template-columns: 1fr;
    }

    .ahu-course-card {
        max-width: 560px;
        width: 100%;
    }

    .ahu-sticky-box {
        position: static;
    }
}

@media (max-width: 768px) {
    .ahu-course-hero {
        padding-top: 40px;
    }

    .ahu-course-meta,
    .ahu-policy-grid,
    .ahu-rules {
        grid-template-columns: 1fr;
    }

    .ahu-panel {
        padding: 22px;
    }

    .ahu-course-title {
        letter-spacing: 0;
    }
}

@media (max-width: 560px) {
    .ahu-container {
        width: min(100% - 22px, 1180px);
    }

    .ahu-course-meta {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ahu-hero-actions .ahu-btn {
        width: 100%;
    }

    .ahu-card-body,
    .ahu-sticky-box,
    .ahu-mini-policy {
        padding: 18px;
    }
}