* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #1a202c;
    background-color: #f7fafc;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography - No emojis, clean fonts */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: #1e3a8a;
    position: relative;
    padding-bottom: 1rem;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #1e3a8a, #166534);
    border-radius: 2px;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, #1e3a8a 0%, #166534 100%);
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

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

.logo-img {
    height: 50px;
    width: auto;
}

.logo h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    letter-spacing: -0.5px;
}

.logo p {
    font-size: 0.7rem;
    opacity: 0.8;
    margin-top: -0.25rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    opacity: 0.8;
    border-bottom: 2px solid white;
    padding-bottom: 0.25rem;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: #1e3a8a;
    color: white;
}

.btn-primary:hover {
    background: #1e40af;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30,58,138,0.3);
}

.btn-secondary {
    background: #166534;
    color: white;
}

.btn-secondary:hover {
    background: #15803d;
    transform: translateY(-2px);
}

.btn-outline-light {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-outline-light:hover {
    background: white;
    color: #1e3a8a;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #166534 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 12px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #1e3a8a, #166534);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    font-weight: bold;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    color: #1e3a8a;
}

.feature-card p {
    color: #4a5568;
}

/* Courses Preview */
.courses-preview {
    padding: 5rem 0;
    background: #f1f5f9;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.course-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

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

.course-card h3 {
    color: #1e3a8a;
    margin-bottom: 0.75rem;
}

.course-card p {
    color: #4a5568;
    margin-bottom: 1rem;
}

.course-price {
    font-size: 1.25rem;
    font-weight: bold;
    color: #166534;
    margin-bottom: 1rem;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, #1e3a8a 0%, #166534 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cta-content h2 {
    margin-bottom: 1rem;
}

.cta-content p {
    margin-bottom: 2rem;
    font-size: 1.125rem;
}

/* Forms */
.form-container {
    max-width: 600px;
    margin: 3rem auto;
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #1e3a8a;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1e3a8a;
    box-shadow: 0 0 0 3px rgba(30,58,138,0.1);
}

.error-message {
    background: #fee2e2;
    color: #dc2626;
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.success-message {
    background: #dcfce7;
    color: #166534;
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* Dashboard */
.dashboard-header {
    background: white;
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 0;
}

.dashboard-container {
    display: flex;
    min-height: calc(100vh - 200px);
}

.dashboard-sidebar {
    width: 260px;
    background: #1e293b;
    color: white;
    padding: 2rem 1rem;
}

.dashboard-sidebar a {
    display: block;
    padding: 0.75rem 1rem;
    color: #cbd5e1;
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    transition: all 0.3s;
}

.dashboard-sidebar a:hover,
.dashboard-sidebar a.active {
    background: #334155;
    color: white;
}

.dashboard-main {
    flex: 1;
    padding: 2rem;
    background: #f1f5f9;
}

/* Tables */
.data-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.data-table th {
    background: #f8fafc;
    font-weight: 600;
    color: #1e3a8a;
}

.data-table tr:hover {
    background: #f8fafc;
}

/* Admin Cards */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 2rem;
    color: #1e3a8a;
    margin-bottom: 0;
}

.stat-card p {
    color: #64748b;
    margin-top: 0.5rem;
}

/* Footer */
.footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 3rem 0 1rem;
    margin-top: 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer h3,
.footer h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 0.5rem;
}

.footer a {
    color: #cbd5e1;
    text-decoration: none;
}

.footer a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #334155;
    font-size: 0.875rem;
}

/* Loading State */
.loading {
    text-align: center;
    padding: 2rem;
    color: #64748b;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #1e3a8a;
        position: absolute;
        top: 70px;
        left: 0;
        padding: 1rem;
        gap: 1rem;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .dashboard-container {
        flex-direction: column;
    }
    
    .dashboard-sidebar {
        width: 100%;
        padding: 1rem;
    }
    
    .data-table {
        display: block;
        overflow-x: auto;
    }
}