:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --white: #ffffff;
    --bg-light: #f3f4f6;
    --transition: all 0.3s ease;
}

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

body {
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Navigation */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
}

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

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


.btn-download {
    background-color: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 50px;
    transition: var(--transition);
    text-decoration: none;
}

.btn-download:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
    padding: 80px 5%;
    text-align: center;
    animation: fadeIn 1s ease-in;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

/* Features Grid */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 5%;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

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

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: var(--transition);
    border: 1px solid #e5e7eb;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

/* Content Pages (Privacy, Terms) */
.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 5%;
    flex: 1;
}

.content-wrapper h1 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.content-wrapper h2 {
    margin-top: 30px;
    margin-bottom: 15px;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 10px;
}

.content-wrapper ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.content-wrapper li {
    margin-bottom: 10px;
}

.last-updated {
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 40px;
    display: block;
}

.alert-box {
    background-color: #fff7ed;
    border-left: 4px solid #f97316;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: var(--white);
    padding: 40px 5%;
    margin-top: auto;
}

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

.footer-section h3 {
    margin-bottom: 20px;
    color: var(--white);
}

.footer-links li {
    list-style: none;
    margin-bottom: 10px;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
}

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

.copyright {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-links {
        flex-direction: column;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}