:root {
    --primary: #cc0000;
    --primary-dark: #990000;
    --primary-light: #ff3333;
    --success: #4a90e2;
    --warning: #f5a623;
    --error: #d0021b;
    --surface: rgba(248, 250, 252, 0.95);
    --surface-light: rgba(255, 255, 255, 0.9);
    --background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 25%, #e2e8f0 50%, #f8fafc 75%, #f1f5f9 100%);
    --text: #1e293b;
    --text-light: #475569;
    --text-muted: #64748b;
    --border: rgba(204, 0, 0, 0.2);
    --shadow: rgba(30, 41, 59, 0.08);
    --shadow-red: rgba(204, 0, 0, 0.25);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--background);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 10px 0;
}

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

.mobile-menu {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* Hero Section */
.hero {
    padding: 120px 20px 80px;
    text-align: center;
    background: linear-gradient(135deg, var(--surface-light) 0%, var(--surface) 100%);
}

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

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    padding: 15px 30px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
    font-size: 16px;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 8px 25px var(--shadow-red);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px var(--shadow-red);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 2px solid var(--border);
}

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

/* Stats Section */
.stats {
    padding: 60px 20px;
    background: var(--surface-light);
}

.stats-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.stat-card {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow);
    transition: transform 0.3s ease;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Features Section */
.features {
    padding: 80px 20px;
}

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

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--surface-light);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px var(--shadow);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.feature-description {
    color: var(--text-light);
}

/* Auth Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 20px;
    padding: 40px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    text-align: center;
}

.auth-tabs {
    display: flex;
    margin-bottom: 30px;
    background: var(--surface);
    border-radius: 10px;
    padding: 5px;
}

.auth-tab {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.auth-tab.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 2px 10px var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text);
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(204, 0, 0, 0.1);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

/* Notification */
.notification {
    position: fixed;
    top: 90px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    z-index: 3000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(135deg, #4CAF50, #45a049);
}

.notification.error {
    background: linear-gradient(135deg, #f44336, #da190b);
}

.notification.info {
    background: linear-gradient(135deg, #2196F3, #1976D2);
}

/* Footer */
.footer {
    background: var(--text);
    color: white;
    padding: 40px 20px 20px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 20px;
}

.footer-text {
    color: #94a3b8;
    margin-bottom: 20px;
}

/* Loading States */
.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Animations */
.content-hidden {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.content-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .modal-content {
        width: 95%;
        padding: 30px 20px;
    }
}