:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #f8fafc;
    --text-main: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
}
body { 
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    line-height: 1.6; 
    margin: 0; 
    padding: 0; 
    background-color: var(--secondary); 
    color: var(--text-main); 
}
nav {
    background: white;
    padding: 15px 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-container {
    max-width: 1200px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}
.nav-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.2s;
}
.nav-links a:hover {
    color: var(--primary);
}
.header {
    background: linear-gradient(135deg, #1e3a8a 0%, var(--primary) 100%);
    color: white;
    padding: 80px 20px;
    text-align: center;
}
.header h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin: 0;
    font-weight: 800;
}
.header p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 20px auto 0;
    opacity: 0.9;
}
.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}
.card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: -40px;
}
.feature-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
}
.feature-card h3 {
    color: var(--primary);
    margin-top: 0;
}
.footer {
    text-align: center;
    padding: 40px 20px;
    background: white;
    margin-top: 60px;
    border-top: 1px solid var(--border);
}
.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}
.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
}
.footer-links a:hover {
    color: var(--primary);
}
@media (max-width: 768px) {
    .nav-container { flex-direction: column; gap: 15px; }
    .header { padding: 40px 20px; }
}
input, textarea, button {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    box-sizing: border-box;
    font-family: inherit;
}
button {
    background: var(--primary);
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}
button:hover { background: var(--primary-dark); }