:root {
    --ci-orange: #ff9800;
    --ci-orange-dark: #f47c00;
    --ci-red: #ef3e36;
    --ci-green: #68b80f;
    --ci-blue: #19aee6;
    --ci-heading: #1e1e1e;
    --ci-body: #6f6f6f;
    --ci-border: #ececec;
    --ci-bg: #ffffff;
    --ci-soft: #fafafa;
    --ci-shadow: 0 18px 55px rgba(16, 24, 40, 0.08);
    --ci-radius: 14px;

    --primary-color: #eb8b13;
    --secondery-color: #010101;
    --third-color: #85b500;
    --forth-color: #f9d100;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Tahoma, Arial, sans-serif;
    background: #fff;
    color: var(--ci-heading);
}

.course-details-section {
    padding: 28px 38px 60px;
    /* background:
        radial-gradient(
            circle at 12% 8%,
            rgba(255, 152, 0, 0.08),
            transparent 24%
        ),
        linear-gradient(180deg, #ffffff 0%, #fbfbfb 100%); */
}

.course-details-container {
    max-width: 1180px;
    margin: 0 auto;
}

.course-breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    color: #8a8a8a;
    font-size: 14px;
}

.course-breadcrumb span:last-child {
    color: var(--ci-orange-dark);
    font-weight: 700;
}

.course-hero {
    position: relative;
    min-height: 292px;
    border-radius: var(--ci-radius);
    overflow: hidden;
    background-image:
        linear-gradient(90deg, rgba(0, 0, 0, 0.25), rgba(0, 0, 0, 0.78)),
        url("<?= htmlspecialchars($course['image']) ?>");
    background-size: cover;
    background-position: center;
    box-shadow: var(--ci-shadow);
}

.course-hero-content {
    min-height: 292px;
    padding: 36px 42px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    color: #fff;
    /* max-width: 660px;
    margin-inline-start: auto; */
    background: rgba(0, 0, 0, 0.3);
}

.course-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    margin-bottom: 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--ci-orange-dark);
    font-weight: 800;
    font-size: 13px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.16);
}

.course-hero h1 {
    margin: 0 0 14px;
    font-size: clamp(28px, 4vw, 46px);
    line-height: 1.35;
    font-weight: 900;
}

.course-hero p {
    margin: 0;
    max-width: 610px;
    font-size: 18px;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.9);
}

.course-meta-card {
    position: relative;
    z-index: 2;
    width: calc(100% - 72px);
    margin: -38px auto 22px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    background: #fff;
    border: 1px solid var(--ci-border);
    border-radius: 12px;
    box-shadow: var(--ci-shadow);
    overflow: hidden;
}

.course-meta-item {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 14px;
    border-inline-start: 1px solid var(--ci-border);
}

.course-meta-item:first-child {
    border-inline-start: 0;
}

.course-meta-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255, 152, 0, 0.1);
    color: var(--ci-orange-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.course-meta-label {
    display: block;
    margin-bottom: 4px;
    color: #8a8a8a;
    font-size: 12px;
}

.course-meta-value {
    display: block;
    color: var(--ci-heading);
    font-weight: 800;
    font-size: 14px;
}

.course-register-card {
    display: grid;
    grid-template-columns: 230px 1fr;
    align-items: center;
    gap: 26px;
    padding: 26px;
    margin-bottom: 28px;
    background: #fff;
    border: 1px solid var(--ci-border);
    border-radius: var(--ci-radius);
    box-shadow: var(--ci-shadow);
}

.course-price-label {
    color: #777;
    font-weight: 700;
    margin-bottom: 4px;
}

.course-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
    /* color: var(--ci-orange-dark); */
    color: #14b7f1;
    font-size: 38px;
    font-weight: 900;
    line-height: 1;
}

.course-price small {
    font-size: 17px;
}

.course-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.course-btn {
    border: 0;
    outline: 0;
    cursor: pointer;
    height: 52px;
    padding: 0 34px;
    border-radius: 8px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 900;
    transition: 0.2s ease;
}

.course-btn-primary {
    min-width: 180px;
    background: linear-gradient(
        135deg,
        var(--ci-orange),
        var(--ci-orange-dark)
    );
    color: #fff;
    box-shadow: 0 14px 32px rgba(255, 152, 0, 0.28);
}

.course-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 38px rgba(255, 152, 0, 0.34);
}

.course-btn-light {
    background: #fff;
    border: 1px solid var(--ci-border);
    color: #242424;
}

.course-secure-note {
    margin-top: 12px;
    color: #3e9a29;
    font-size: 13px;
    font-weight: 700;
}

.course-tabs {
    display: flex;
    align-items: center;
    /* justify-content: space-between; */
    gap: 12px;
    margin-bottom: 22px;
    border-bottom: 1px solid var(--ci-border);
    overflow-x: auto;
}

.course-tab {
    padding: 16px 14px;
    color: #6f6f6f;
    font-weight: 800;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
}

.course-tab.active {
    color: var(--ci-orange-dark);
    border-color: var(--ci-orange-dark);
}

.course-info-card {
    padding: 30px;
    margin-bottom: 24px;
    background: #fff;
    border: 1px solid var(--ci-border);
    border-radius: var(--ci-radius);
    box-shadow: var(--ci-shadow);
}

.course-card-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.course-card-title h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 900;
}

.course-title-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255, 152, 0, 0.1);
    color: var(--ci-orange-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.course-description {
    margin: 0;
    color: var(--ci-body);
    font-size: 16px;
    line-height: 2;
}

.course-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 26px;
    padding-top: 24px;
    border-top: 1px solid var(--ci-border);
}

.course-feature {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 16px;
    border-radius: 12px;
    background: var(--ci-soft);
}

.course-feature-icon {
    width: 40px;
    height: 40px;
    flex: 0 0 auto;
    border-radius: 12px;
    background: #fff;
    color: var(--ci-orange-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 21px;
    box-shadow: 0 8px 18px rgba(16, 24, 40, 0.06);
}

.course-feature h3 {
    margin: 0 0 6px;
    font-size: 15px;
    font-weight: 900;
}

.course-feature p {
    margin: 0;
    color: var(--ci-body);
    font-size: 13px;
    line-height: 1.7;
}

.course-bottom-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.course-check-list {
    display: grid;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.course-check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: #444;
    font-size: 15px;
    line-height: 1.8;
}

.course-check-list li::before {
    content: "✓";
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
    margin-top: 3px;
    border-radius: 50%;
    color: #fff;
    background: var(--ci-green);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 900;
}

.course-accordion {
    display: grid;
    gap: 12px;
}

.course-lesson {
    padding: 16px;
    border: 1px solid var(--ci-border);
    border-radius: 10px;
    background: #fff;
}

.course-lesson-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.course-lesson-title {
    font-weight: 900;
    color: #333;
}

.course-lesson-meta {
    margin-top: 8px;
    color: #888;
    font-size: 13px;
}

.course-arrow {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: #fafafa;
    border: 1px solid var(--ci-border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--ci-orange-dark);
}

@media (max-width: 992px) {
    .course-details-section {
        padding: 28px 18px 50px;
    }

    .course-meta-card {
        width: 100%;
        margin-top: 18px;
        grid-template-columns: repeat(2, 1fr);
    }

    .course-register-card {
        grid-template-columns: 1fr;
    }

    .course-features {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 576px) {
    .course-hero-content {
        padding: 28px 22px;
    }

    .course-meta-card {
        grid-template-columns: 1fr;
    }

    .course-meta-item {
        justify-content: flex-start;
        border-inline-start: 0;
        border-top: 1px solid var(--ci-border);
    }

    .course-meta-item:first-child {
        border-top: 0;
    }

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

    .course-btn,
    .course-btn-primary {
        width: 100%;
        min-width: 0;
    }

    .course-actions {
        width: 100%;
    }
}

.course-tabs {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 22px;
    border-bottom: 1px solid var(--ci-border) !important;
    overflow-x: auto;
}

.course-tabs .nav-item {
    margin-bottom: 0;
}

.course-tab {
    position: relative;
    padding: 16px 18px;
    border: 0;
    background: transparent;
    color: #6f6f6f;
    font-family: inherit;
    font-size: 15px;
    font-weight: 800;
    white-space: nowrap;
    cursor: pointer;
    transition: 0.2s ease;
}

.course-tab::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: -1px;
    width: 100%;
    height: 3px;
    border-radius: 999px;
    background: transparent;
    transition: 0.2s ease;
}

.course-tab.active {
    color: var(--ci-orange-dark);
}

.course-tab.active::after {
    background: var(--ci-orange-dark);
}

.course-tab:hover {
    color: var(--ci-orange-dark);
}

.course-instructor-box {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.course-instructor-avatar {
    width: 86px;
    height: 86px;
    flex: 0 0 auto;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(255, 152, 0, 0.12);
    color: var(--ci-orange-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    font-weight: 900;
}

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

.course-instructor-info h3 {
    margin: 0 0 8px;
    font-size: 22px;
    font-weight: 900;
    color: var(--ci-heading);
}

.course-instructor-info p {
    margin: 0 0 12px;
    color: var(--ci-body);
    line-height: 1.8;
}

.course-instructor-bio {
    color: var(--ci-body);
    line-height: 1.9;
}

@media (max-width: 576px) {
    .course-instructor-box {
        flex-direction: column;
    }
}