/* ========================================
   CSS Variables & Design System
   ======================================== */
:root {
    /* Color Palette */
    --primary: #1e3a8a;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #0ea5e9;
    --accent: #06b6d4;

    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-white: #ffffff;

    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-grey: #f3f4f6;
    --bg-dark: #111827;

    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

section {
    padding: var(--spacing-2xl) 0;
}

/* ========================================
   Typography
   ======================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.title-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    margin: 0 auto var(--spacing-md);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--text-white);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

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

.logo-img {
    height: 55px;
    width: auto;
    object-fit: contain;
    background: transparent;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-btn {
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--text-white);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary);
    margin: 3px 0;
    transition: all var(--transition-base);
    border-radius: 2px;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(14, 165, 233, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.3) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    color: #F5F7FA;
    text-align: center;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    color: #F5F7FA;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: #F5F7FA;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    color: #F5F7FA;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Fade-in Animations */
.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-delay-1 {
    animation: fadeIn 1s ease-out 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.6s both;
}

.fade-in-delay-3 {
    animation: fadeIn 1s ease-out 0.9s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--bg-white);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-features {
    display: grid;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.feature-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    background: var(--bg-white);
}

.feature-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.feature-content h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.feature-content p {
    color: var(--text-light);
    margin: 0;
}

/* ========================================
   Academic Activities Section
   ======================================== */
.academic {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.service-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-light);
    margin: 0;
}

/* ========================================
   Industry Activities Section
   ======================================== */
.industry {
    background: var(--bg-white);
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.industry-card {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.industry-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    transform: scaleY(0);
    transition: transform var(--transition-base);
    transform-origin: top;
}

.industry-card:hover::before {
    transform: scaleY(1);
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.industry-icon {
    font-size: 2.5rem;
}

.card-header h3 {
    color: var(--primary);
    margin: 0;
}

.industry-card>p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* ========================================
   Student Activities Section
   ======================================== */
.students {
    background: var(--bg-light);
}

.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.student-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    border: 2px solid var(--border-color);
}

.student-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    opacity: 0.1;
    border-radius: 0 0 0 100%;
    transition: all var(--transition-base);
}

.student-card:hover::after {
    width: 150px;
    height: 150px;
}

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

.card-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-light);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.student-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.student-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--text-white);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
}

/* ========================================
   Instructors Section
   ======================================== */
.instructors {
    background: var(--bg-white);
}

.instructors-content {
    max-width: 1000px;
    margin: 0 auto;
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.highlight-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--text-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.highlight-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.highlight-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.highlight-card h3 {
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.highlight-card p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

.instructor-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-box {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
}

.feature-box h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.feature-box p {
    color: var(--text-light);
    margin: 0;
}

/* ========================================
   Management Section
   ======================================== */
.management {
    background: var(--bg-light);
}

.management-content {
    max-width: 700px;
    margin: 0 auto;
}

.manager-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.manager-avatar {
    flex-shrink: 0;
}

.avatar-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
}

.manager-info h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.manager-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

.manager-description {
    color: var(--text-light);
    margin: 0;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--bg-white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-card {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
    transition: all var(--transition-base);
}

.info-card:hover {
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.info-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.info-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.info-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
}

.info-card a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

.info-card a:hover {
    color: var(--primary);
}

.info-note {
    font-size: 0.875rem;
    color: var(--text-light);
    font-style: italic;
}

.map-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--primary) !important;
    font-weight: 600;
    transition: all var(--transition-base);
}

.map-link:hover {
    transform: translateX(5px);
}

.contact-form-wrapper {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.contact-form h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.map-container {
    margin-top: var(--spacing-xl);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a8a 100%);
    color: var(--text-white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--text-white);
    margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    color: #fef3c7;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links,
.footer-contact {
    list-style: none;
}

.footer-links li,
.footer-contact li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-contact li {
    color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-tagline {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-base);
        align-items: flex-start;
    }

    .nav-menu.active {
        left: 0;
    }

    .manager-card {
        flex-direction: column;
        text-align: center;
    }

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

    .services-grid,
    .industry-grid,
    .students-grid {
        grid-template-columns: 1fr;
    }

    .logo h1 {
        font-size: 1.1rem;
    }

    .logo-img {
        height: 40px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.75rem;
    }
}