/* 
   HCDI SRU Landing Page Styles 
   Theme: Academic Premium - Royal Blue & Gold
*/

:root {
    /* Colors */
    --primary-color: #1a237e;
    /* Royal Blue */
    --primary-dark: #000051;
    --primary-light: #534bae;

    --secondary-color: #ffca28;
    /* Amber/Gold */
    --secondary-hover: #ffb300;

    --accent-color: #00bcd4;
    /* Cyan for accents */

    --text-main: #212529;
    --text-muted: #6c757d;
    --text-light: #f8f9fa;

    --bg-body: #ffffff;
    --bg-light: #f8f9fa;
    --bg-surface: #ffffff;

    --border-color: #e9ecef;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-heading: 'Prompt', sans-serif;
    --font-body: 'Sarabun', sans-serif;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition: all 0.3s ease;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    line-height: 1.2;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Typography Utilities */
.text-center {
    text-align: center;
}

.text-white {
    color: white;
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.7);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background-color: var(--secondary-color);
    color: var(--text-main);
}

.btn-warning:hover {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-outline-white {
    background-color: transparent;
    border-color: white;
    color: white;
}

.btn-outline-white:hover {
    background-color: white;
    color: var(--primary-color);
}

.btn-text {
    color: var(--text-muted);
    padding: 0.75rem 1rem;
}

.btn-text:hover {
    color: var(--primary-color);
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--bg-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    padding: 0.8rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.logo-icon.white {
    background: white;
    color: var(--primary-color);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.brand-hcdi {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.brand-uni {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-main);
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-auth {
    display: flex;
    gap: 1rem;
    margin-left: 1rem;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-main);
}

/* Hero Section */
.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(26, 35, 126, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.hero-image-wrapper {
    position: relative;
}

.hero-image-blob {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(255, 202, 40, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: 0;
}

.hero-img {
    position: relative;
    z-index: 1;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transform: rotate(2deg);
    transition: var(--transition);
}

.hero-img:hover {
    transform: rotate(0);
}

.hero-floating-card {
    position: absolute;
    background: white;
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 2;
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    bottom: -20px;
    left: -20px;
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.icon-box.warning {
    background: rgba(255, 202, 40, 0.2);
    color: #f57f17;
}

.text-box {
    display: flex;
    flex-direction: column;
}

.card-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.card-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

@keyframes float {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }

    100% {
        transform: translateY(0);
    }
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
    background: white;
}

.section-header {
    margin-bottom: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.feature-card {
    padding: 2rem;
    border-radius: var(--radius-md);
    background: white;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.feature-icon.primary {
    background: rgba(26, 35, 126, 0.1);
    color: var(--primary-color);
}

.feature-icon.secondary {
    background: rgba(255, 202, 40, 0.1);
    color: #f57f17;
}

.feature-icon.accent {
    background: rgba(0, 188, 212, 0.1);
    color: var(--accent-color);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Courses Section */
.courses {
    padding: var(--spacing-xl) 0;
    background: var(--bg-light);
}

.section-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.course-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.course-thumb {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.course-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.course-card:hover .course-thumb img {
    transform: scale(1.05);
}

.course-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.25rem 0.75rem;
    background: var(--secondary-color);
    color: var(--text-main);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 4px;
}

.course-badge.new {
    background: var(--accent-color);
    color: white;
}

.course-content {
    padding: 1.5rem;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
}

.course-category {
    color: var(--primary-color);
    font-weight: 500;
}

.course-rating {
    color: #f57f17;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.course-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    height: 4.2em;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Search & Filter Styles */
.search-filter-container {
    display: flex;
    gap: 1rem;
    align-items: center;
    background: white;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.search-box {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-input {
    padding: 0.5rem 0.5rem 0.5rem 2.2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    min-width: 250px;
    font-family: inherit;
}

.filter-select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    color: var(--text-dark);
}

.search-btn {
    padding: 0.5rem 1.5rem;
    font-size: 0.95rem;
}

.reset-btn {
    padding: 0.5rem;
    color: var(--text-muted);
    font-weight: 500;
}

.reset-btn:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* No Results State */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    color: var(--text-muted);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-results h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}


.course-title a:hover {
    color: var(--primary-light);
}

.course-instructor {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.instructor-avatar {
    width: 32px;
    height: 32px;
    background: #ccc;
    border-radius: 50%;
}

.course-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-xl) 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://www.transparenttextures.com/patterns/cubes.png');
    /* Subtle texture */
    opacity: 0.1;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.cta-content h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-content p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--text-main);
    color: white;
    padding-top: var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-links h4,
.footer-contact h4 {
    color: white;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

.contact-list i {
    color: var(--secondary-color);
    font-size: 1.25rem;
}

.footer-copyright {
    padding: 2rem 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border-color);
        animation: slideDown 0.3s ease forwards;
    }

    .nav-links.active {
        display: flex;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

    .section-header-flex {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .logo,
    .footer-links ul,
    .contact-list {
        justify-content: center;
    }

    .logo-text {
        align-items: center;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

/* Instructor UI Refinements */
.instructor-tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.25rem;
}

.instructor-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: #f1f5f9;
    color: var(--text-main);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.instructor-tag i {
    font-size: 0.9rem;
    color: var(--text-muted);
}