:root {
    --primary-blue: #1a365d;
    --secondary-blue: #2d3748;
    --accent-blue: #3182ce;
    --cyber-teal: #38b2ac;
    --cyber-purple: #805ad5;
    --text-light: #f7fafc;
    --text-dark: #2d3748;
    --background-white: #ffffff;
    --background-gray: #f7fafc;
    --success: #48bb78;
    --warning: #ed8936;
    --error: #f56565;
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--background-white);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--text-light);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    font-size: 1.2rem;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-tagline {
    font-size: 0.7rem;
    opacity: 0.8;
    margin-top: -5px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

nav a:hover, nav a.active {
    color: var(--cyber-teal);
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--cyber-teal);
    transition: var(--transition);
}

nav a:hover::after, nav a.active::after {
    width: 100%;
}

.cta-button {
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(26, 54, 93, 0.9), rgba(45, 55, 72, 0.9)), url('https://images.unsplash.com/photo-1550751827-4bd374c3f58b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
    background-size: cover;
    background-position: center;
    color: var(--text-light);
    padding: 150px 0 100px;
    text-align: center;
}

.hero-tag {
    background-color: rgba(56, 178, 172, 0.2);
    color: var(--cyber-teal);
    padding: 5px 15px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 15px;
    font-size: 0.9rem;
    font-weight: 600;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

/* Section Styles */
.section-padding {
    padding: 100px 0;
}

.bg-gray {
    background-color: var(--background-gray);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-dark);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--background-white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-blue);
}

/* Courses Section */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.course-image {
    height: 200px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.course-content {
    padding: 20px;
}

.course-category {
    color: var(--cyber-teal);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.course-title {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary-blue);
}

.course-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--text-dark);
}

/* Portfolio Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    position: relative;
    height: 300px;
}

.portfolio-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 20px;
    transform: translateY(100%);
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    height: 400px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
}

.about-text h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--cyber-teal);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-dark);
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.contact-form {
    background: var(--background-white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--cyber-teal);
    box-shadow: 0 0 0 3px rgba(56, 178, 172, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--cyber-teal);
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--cyber-teal);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Admin Panel Styles */
.admin-panel {
    background-color: var(--background-gray);
    min-height: 100vh;
}

.admin-container {
    display: flex;
}

.admin-sidebar {
    width: 250px;
    background: linear-gradient(180deg, var(--primary-blue), var(--secondary-blue));
    color: white;
    height: 100vh;
    position: fixed;
    transition: var(--transition);
    z-index: 1000;
}

.admin-logo {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-nav {
    padding: 20px 0;
}

.nav-item {
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
    background-color: rgba(255, 255, 255, 0.1);
    border-left: 4px solid var(--cyber-teal);
}

.admin-main {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
    transition: var(--transition);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--background-white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.courses-bg {
    background-color: var(--cyber-teal);
}

.services-bg {
    background-color: var(--success);
}

.testimonials-bg {
    background-color: var(--warning);
}

.users-bg {
    background-color: var(--cyber-purple);
}

.card-title {
    font-size: 0.9rem;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.card-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.card-change {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.positive {
    color: var(--success);
}

.negative {
    color: var(--error);
}

.content-section {
    background: var(--background-white);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.section-header-admin {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    background-color: var(--background-gray);
    font-weight: 600;
    color: var(--text-dark);
}

tr:hover {
    background-color: var(--background-gray);
}

.status {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-active {
    background-color: rgba(72, 187, 120, 0.2);
    color: var(--success);
}

.status-draft {
    background-color: rgba(237, 137, 54, 0.2);
    color: var(--warning);
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-dark);
    transition: var(--transition);
}

.action-btn:hover {
    color: var(--cyber-teal);
}

/* Login Modal */
.login-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: white;
    border-radius: var(--border-radius);
    width: 400px;
    max-width: 90%;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: white;
    padding: 20px;
    text-align: center;
}

.login-body {
    padding: 30px;
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, var(--cyber-teal), var(--cyber-purple));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--cyber-purple), var(--cyber-teal));
}

.security-notice {
    font-size: 0.8rem;
    color: var(--text-light);
    text-align: center;
    margin-top: 15px;
    background: var(--background-gray);
    padding: 10px;
    border-radius: var(--border-radius);
}

/* Success and Error Messages */
.success-message {
    background: var(--success);
    color: white;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    text-align: center;
}

.error-message {
    background: var(--error);
    color: white;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content, .contact-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .services-grid, .courses-grid, .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    /* Admin Responsive */
    .admin-sidebar {
        width: 70px;
    }
    
    .admin-sidebar .logo-text, .admin-sidebar .nav-text {
        display: none;
    }
    
    .admin-main {
        margin-left: 70px;
    }
    
    .dashboard-cards {
        grid-template-columns: 1fr;
    }
    
    .admin-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .section-header-admin {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .section-padding {
        padding: 60px 0;
    }
    
    .service-card, .course-card {
        padding: 20px;
    }
}