/* ==========================================================================
   CADDAM TECHNOLOGIES — COURSES PAGE
   NOTE: .page-title-banner is defined globally in style.css
   ========================================================================== */

:root {
    --primary-blue: var(--primary-navy);
    --primary-blue-light: rgba(10, 17, 40, 0.06);
    --text-main: var(--text-body);
    --bg-light: var(--gray-50);
    --radius-xl: 32px;
    --shadow-premium: 0 30px 60px rgba(10, 17, 40, 0.16);
}

.courses-filter-section {
    padding: 70px 0 80px;
    background-color: var(--bg-light);
}

.category-tabs-wrapper {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.tab-btn {
    background-color: #ffffff;
    border: 1.5px solid var(--border-color);
    padding: 10px 24px;
    border-radius: 50px;
    font-family: var(--font-sans);
    color: var(--text-main);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.tab-btn:hover {
    background-color: var(--bg-light);
    border-color: var(--primary-navy);
    color: var(--primary-navy);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-navy-light));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(0, 49, 97, 0.28);
    transform: translateY(-2px);
}

.courses-grid-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.course-card {
    background-color: #ffffff;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
}

.course-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-navy);
    border-radius: 4px 0 0 4px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.course-card.mechanical::before { background: linear-gradient(to bottom, #d97706, #fbbf24); }
.course-card.civilarch::before  { background: linear-gradient(to bottom, #16a34a, #4ade80); }
.course-card.electrical::before { background: linear-gradient(to bottom, #d97706, #fbbf24); }
.course-card.piping::before     { background: linear-gradient(to bottom, #0891b2, #22d3ee); }
.course-card.ppm::before        { background: linear-gradient(to bottom, #7c3aed, #a78bfa); }

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 49, 97, 0.12);
}

.course-card:hover::before { opacity: 1; }

.course-card.hide-item {
    display: none;
}

.course-card.show-item {
    display: flex;
    animation: courseFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes courseFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.course-card-top {
    padding: 30px;
    flex-grow: 1;
}

.course-badge-level {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    margin-bottom: 15px;
    letter-spacing: 0.5px;
}

.course-card.mechanical .course-badge-level {
    background-color: #fffbeb;
    color: #b45309;
}

.course-card.civilarch .course-badge-level {
    background-color: #ecfdf5;
    color: #047857;
}

.course-card.electrical .course-badge-level {
    background-color: #fff7ed;
    color: #c2410c;
}

.course-card.piping .course-badge-level {
    background-color: #ecfeff;
    color: #0e7490;
}

.course-card.ppm .course-badge-level {
    background-color: #f5f3ff;
    color: #6d28d9;
}

.course-card h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-dark);
    line-height: 1.3;
}

.course-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
}

.course-features {
    border-top: 1px dashed var(--border-color);
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 0.82rem;
    color: var(--text-main);
}

.course-feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.course-feature-item i {
    color: var(--primary-blue);
    font-size: 0.9rem;
    width: 16px;
    text-align: center;
}

.course-card-footer {
    padding: 20px 30px 24px;
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

/* ==================== MODAL OVERLAY STYLES ==================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: #ffffff;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 950px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    padding: 40px;
    box-shadow: var(--shadow-premium);
    animation: modalAnim 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border-color);
}

@keyframes modalAnim {
    from {
        transform: scale(0.9) translateY(30px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 1.8rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
}

.modal-close:hover {
    color: white;
    background: var(--accent-crimson);
    border-color: var(--accent-crimson);
}

.modal-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 40px;
    margin-top: 25px;
}

.modal-info h3 {
    font-size: 1.15rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--primary-blue);
    margin-bottom: 15px;
    margin-top: 30px;
    border-bottom: 2px solid var(--primary-blue-light);
    padding-bottom: 8px;
}

.modal-info h3:first-of-type {
    margin-top: 0;
}

.modal-info p {
    font-size: 0.92rem;
    color: var(--text-main);
    line-height: 1.7;
    margin-bottom: 20px;
}

.sw-badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.sw-modal-badge {
    background-color: var(--primary-blue-light);
    color: var(--primary-blue);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(0, 75, 135, 0.1);
}

.syllabus-accordion-item {
    margin-bottom: 12px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #ffffff;
    box-shadow: var(--shadow-sm);
}

.syllabus-accordion-header:hover {
    background-color: rgba(0, 75, 135, 0.04) !important;
}

.modal-sidebar {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    padding: 30px 24px;
    border-radius: var(--radius-lg);
    position: sticky;
    top: 0;
}

.modal-sidebar h4 {
    font-family: 'Sora', sans-serif;
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    font-weight: 800;
}

.modal-meta-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border-color);
    font-size: 0.88rem;
    margin-bottom: 20px;
}

.modal-meta-row .label {
    color: var(--text-muted);
}

.modal-meta-row .val {
    font-weight: 700;
    color: var(--primary-blue);
}

.modal-sidebar .form-group {
    margin-bottom: 16px;
}

.modal-sidebar .form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
    display: block;
}

.modal-sidebar .form-group input,
.modal-sidebar .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    outline: none;
    background: white;
    transition: var(--transition);
}

.modal-sidebar .form-group input:focus,
.modal-sidebar .form-group textarea:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 75, 135, 0.15);
}


/* Responsive Styles */
@media (max-width: 1024px) {
    .courses-grid-layout {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .courses-filter-section { padding: 40px 0 50px; }
    .courses-grid-layout    { grid-template-columns: 1fr; }

    .category-tabs-wrapper  { gap: 8px; }
    .tab-btn                { padding: 8px 16px; font-size: 0.82rem; }

    .modal-grid    { grid-template-columns: 1fr; gap: 30px; }
    .modal-content { padding: 24px; }
    .modal-course-name { font-size: 1.4rem; }
}

@media (max-width: 480px) {
    .course-card-top    { padding: 20px; }
    .course-card-footer { padding: 14px 20px 18px; }
    .tab-btn { padding: 7px 14px; font-size: 0.8rem; }
}

/* Search & Filter Controls */
.courses-filter-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    margin-bottom: 45px;
}

.search-bar-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin-bottom: 10px;
}

.search-bar-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-bar-input {
    width: 100%;
    padding: 12px 16px 12px 46px;
    border: 1.5px solid var(--border-color);
    border-radius: 50px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    box-shadow: var(--shadow-sm);
    outline: none;
    transition: var(--transition);
}

.search-bar-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 75, 135, 0.15);
}

/* Modal Title overrides */
.modal-course-badge {
    background-color: var(--primary-blue-light);
    color: var(--primary-blue);
    font-size: 0.75rem;
    margin-bottom: 8px;
}

.modal-course-name {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-top: 5px;
}

.modal-submission-alert {
    margin-top: 20px;
}

.syllabus-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ==================== HORIZONTAL CAROUSEL SYSTEM ==================== */
.carousel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    margin-top: 40px;
}

.carousel-header h3 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--primary-navy);
    margin: 0;
    position: relative;
    padding-left: 15px;
}

.carousel-header h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: var(--gradient-blue-teal);
    border-radius: 2px;
}

.carousel-nav-arrows {
    display: flex;
    gap: 10px;
}

.carousel-arrow {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--primary-navy);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

.carousel-arrow:hover {
    background: var(--primary-navy);
    color: #ffffff;
    border-color: var(--primary-navy);
    box-shadow: 0 4px 12px rgba(10, 17, 40, 0.15);
}

.carousel-track-wrapper {
    position: relative;
    overflow: hidden;
    padding: 10px 0 25px;
}

.carousel-track {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 10px;
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

/* Hide scrollbar completely */
.carousel-track::-webkit-scrollbar {
    display: none;
}

.carousel-track .course-card {
    flex: 0 0 calc(33.333% - 20px);
    min-width: 300px;
    scroll-snap-align: start;
}

@media (max-width: 1024px) {
    .carousel-track .course-card {
        flex: 0 0 calc(50% - 15px);
    }
}

@media (max-width: 768px) {
    .carousel-header h3 {
        font-size: 1.25rem;
    }
    .carousel-track .course-card {
        flex: 0 0 100%;
    }
}