/* =========================================================
   Course Detail Page — Blue / Black / White Theme
   ========================================================= */

:root {
    --c-black: #0a0a0a;
    --c-black-soft: #141414;
    --c-blue: #1e6fd9;
    --c-blue-dark: #0f4fa8;
    --c-blue-light: #4da3ff;
    --c-white: #ffffff;
    --c-gray-bg: #f6f7f9;
    --c-gray-text: #55585c;
    --c-border: #e6e8eb;
}

.container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== Scroll Reveal (progressive enhancement — page works fully without JS) ===== */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Hero ===== */
.course-hero {
    background: var(--c-black);
    background-image:
        radial-gradient(circle at 15% 25%, rgba(30, 111, 217, 0.25), transparent 45%),
        radial-gradient(circle at 85% 75%, rgba(30, 111, 217, 0.18), transparent 40%);
    color: var(--c-white);
    padding: 70px 40px 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.breadcrumb {
    color: #8a8f96;
    font-size: 0.86rem;
    margin-bottom: 20px;
}

.breadcrumb a {
    color: #cfd3d8;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--c-blue-light);
}

.course-tag {
    display: inline-block;
    background: rgba(30, 111, 217, 0.15);
    border: 1px solid rgba(30, 111, 217, 0.35);
    color: var(--c-blue-light);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.course-hero h1 {
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 14px;
}

.hero-description {
    color: #a9adb2;
    font-size: 1.02rem;
    line-height: 1.6;
    margin-bottom: 22px;
    max-width: 560px;
}

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

.badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #d8dbdf;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 20px;
}

.badge-level {
    background: rgba(30, 111, 217, 0.18);
    border-color: rgba(30, 111, 217, 0.35);
    color: var(--c-blue-light);
}

.badge-highlight {
    background: rgba(255, 255, 255, 0.1);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 26px;
    flex-wrap: wrap;
}

.hero-price {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.hero-price span {
    color: #8a8f96;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.hero-price strong {
    color: var(--c-white);
    font-size: 1.3rem;
    font-weight: 700;
}

.hero-image img {
    width: 100%;
    border-radius: 18px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

/* ===== Layout ===== */
.course-body {
    background: var(--c-white);
    padding: 70px 0 90px;
}

.course-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 46px;
    align-items: start;
}

.course-block {
    margin-bottom: 50px;
}

.course-block > h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--c-black);
    margin-bottom: 18px;
    position: relative;
    display: inline-block;
}

.course-block > h2::after {
    content: '';
    display: block;
    width: 44px;
    height: 3px;
    background: var(--c-blue);
    border-radius: 2px;
    margin-top: 10px;
}

.course-block > p {
    color: var(--c-gray-text);
    font-size: 0.98rem;
    line-height: 1.75;
}

.section-heading {
    margin-bottom: 22px;
}

.section-heading span {
    display: inline-block;
    color: var(--c-blue);
    text-transform: uppercase;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    margin-bottom: 8px;
}

.section-heading h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--c-black);
}

.section-heading-center {
    text-align: center;
}

.empty-text {
    color: var(--c-gray-text);
    font-size: 0.92rem;
}

/* -- Syllabus accordion (native <details>, no JS required) -- */
.syllabus-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.syllabus-item {
    border: 1px solid var(--c-border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--c-gray-bg);
}

.syllabus-item summary {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 600;
    color: var(--c-black);
    font-size: 0.95rem;
    list-style: none;
}

.syllabus-item summary::-webkit-details-marker {
    display: none;
}

.syllabus-item summary::after {
    content: '+';
    margin-left: auto;
    color: var(--c-blue);
    font-size: 1.2rem;
    font-weight: 700;
    transition: transform 0.2s ease;
}

.syllabus-item[open] summary::after {
    transform: rotate(45deg);
}

.syllabus-number {
    color: var(--c-blue);
    font-weight: 700;
    font-size: 0.85rem;
}

.syllabus-body {
    padding: 0 20px 18px 50px;
    color: var(--c-gray-text);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* -- Features grid -- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.feature-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--c-gray-bg);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 18px 20px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 28px rgba(10, 10, 10, 0.08);
    border-color: rgba(30, 111, 217, 0.3);
}

.feature-icon {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--c-blue);
    color: var(--c-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
}

.feature-card h4 {
    color: var(--c-black);
    font-size: 0.95rem;
    font-weight: 600;
}

/* ===== Sidebar ===== */
.course-sidebar {
    position: sticky;
    top: 100px;
}

.sidebar-card {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 20px 44px rgba(10, 10, 10, 0.08);
}

.sidebar-card h3 {
    color: var(--c-black);
    font-size: 1.1rem;
    margin-bottom: 18px;
}

.fact-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
}

.fact-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--c-border);
    font-size: 0.9rem;
}

.fact-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.fact-list span {
    color: var(--c-gray-text);
}

.fact-list strong {
    color: var(--c-black);
}

.fact-price strong {
    color: var(--c-blue);
    font-size: 1.05rem;
}

.sidebar-cta {
    display: block;
    width: 100%;
    text-align: center;
    margin-bottom: 10px;
}

.btn-outline-dark {
    border: 2px solid var(--c-border);
    color: var(--c-black);
    background: transparent;
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
}

.btn-outline-dark:hover {
    background: var(--c-black);
    color: var(--c-white);
    border-color: var(--c-black);
}

/* ===== Enrollment Section ===== */
.enrollment-section {
    background: var(--c-gray-bg);
    padding: 90px 0;
}

.enrollment-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.section-tag {
    display: inline-block;
    color: var(--c-blue);
    text-transform: uppercase;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    margin-bottom: 12px;
}

.enrollment-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--c-black);
    margin-bottom: 14px;
    letter-spacing: -0.4px;
}

.enrollment-content p {
    color: var(--c-gray-text);
    font-size: 0.98rem;
    line-height: 1.65;
    margin-bottom: 22px;
}

.enroll-points {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    color: var(--c-black);
    font-weight: 600;
    font-size: 0.92rem;
}

.enrollment-form-card {
    background: var(--c-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 44px rgba(10, 10, 10, 0.08);
}

.enrollment-form-card .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.enrollment-form-card .form-group {
    margin-bottom: 18px;
}

.enrollment-form-card input,
.enrollment-form-card textarea {
    width: 100%;
    padding: 13px 16px;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    font-size: 0.92rem;
    font-family: inherit;
    color: #1a1a1a;
    background-color: var(--c-gray-bg);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.enrollment-form-card input::placeholder,
.enrollment-form-card textarea::placeholder {
    color: #9aa7b5;
}

.enrollment-form-card input:focus,
.enrollment-form-card textarea:focus {
    outline: none;
    border-color: var(--c-blue);
    background-color: var(--c-white);
    box-shadow: 0 0 0 4px rgba(30, 111, 217, 0.12);
}

.enrollment-form-card textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--c-blue);
    color: var(--c-white);
    border: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    justify-content: center;
    transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.submit-btn:hover {
    background-color: var(--c-blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(30, 111, 217, 0.3);
}

.btn-arrow {
    transition: transform 0.25s ease;
}

.submit-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ===== Related Courses ===== */
.related-courses {
    background: var(--c-white);
    padding: 90px 0;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.related-card {
    display: block;
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: 14px;
    overflow: hidden;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.related-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(10, 10, 10, 0.1);
    border-color: rgba(30, 111, 217, 0.3);
}

.related-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
}

.related-card-body {
    padding: 20px;
}

.related-card-body h3 {
    color: var(--c-black);
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.related-card-body p {
    color: var(--c-gray-text);
    font-size: 0.88rem;
    line-height: 1.5;
    margin-bottom: 12px;
}

.related-card-link {
    color: var(--c-blue);
    font-size: 0.86rem;
    font-weight: 700;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .hero-image {
        order: -1;
    }

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

    .course-sidebar {
        position: static;
    }

    .enrollment-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .course-hero {
        padding: 54px 20px 44px;
    }

    .course-hero h1 {
        font-size: 1.8rem;
    }

    .course-body,
    .enrollment-section,
    .related-courses {
        padding: 50px 0;
    }

    .enrollment-form-card {
        padding: 26px 22px;
    }

    .enrollment-form-card .form-row {
        grid-template-columns: 1fr;
    }
}

.application-form{
    margin-top:30px;
}

.application-form p{
    margin-bottom:18px;
}

.application-form label{
    display:block;
    font-weight:600;
    margin-bottom:8px;
}

.application-form input,
.application-form textarea,
.application-form select{
    width:100%;
    padding:12px;
    border:1px solid #ddd;
    border-radius:8px;
    font-size:15px;
    box-sizing:border-box;
}

.application-form textarea{
    resize:vertical;
}