:root {
    --primary: #6c5ce7;
    --primary-dark: #5649c0;
    --secondary: #00cec9;
    --accent: #fd79a8;
    --light: #f8f9fa;
    --dark: #2d3436;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #d63031;
    --gray: #636e72;
    --light-gray: #dfe6e9;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    text-decoration: none;
}

body {
    background-color: #f5f6fa;
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header Styles */
.app-header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
    z-index: 101;
}

.logo-icon {
    margin-right: 10px;
    font-size: 1.4rem;
}

/* Mobile Menu Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
    z-index: 101;
    transition: var(--transition);
}

.menu-toggle:hover {
    color: var(--primary);
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 25px;
    align-items: center;
    transition: var(--transition);
}

.nav-links a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.auth-buttons {
    display: flex;
    gap: 15px;
    margin-left: 20px;
}

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
}

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: rgba(108, 92, 231, 0.1);
}

/* Hero Section */
.hero {
    padding: 80px 5%;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.hero p {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto 40px;
}

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

/* Features Section */
.features {
    padding: 80px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-title {
    font-size: 2.2rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.section-subtitle {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark);
}

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

/* Stats Section */
.stats {
    padding: 80px 5%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.stats-container {
    max-width: 1400px;
    margin: 0 auto;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* CTA Section */
.cta {
    padding: 80px 5%;
    text-align: center;
    background: white;
}

.cta h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.cta p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 40px;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 60px 5% 30px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.footer-logo i {
    margin-right: 10px;
}

.footer-description {
    color: #b2b2b2;
    margin-bottom: 20px;
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #b2b2b2;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 40px;
    margin-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #b2b2b2;
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .nav-links {
        gap: 15px;
    }
    
    .auth-buttons {
        gap: 10px;
    }
    
    .btn {
        padding: 8px 15px;
        font-size: 0.8rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 30px 30px;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        z-index: 100;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        padding: 12px 0;
        font-size: 1.1rem;
        width: 100%;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .auth-buttons {
        flex-direction: column;
        margin-left: 0;
        width: 100%;
        margin-top: 20px;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

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