:root {
    --primary: #0a3d62;
    --secondary: #1e3799;
    --light: #f5f6fa;
    --dark: #1e272e;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--light);
    color: var(--dark);
}

header, footer {
    background: var(--primary);
    color: #fff;
}

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

nav {
    display: flex;
    justify-content: space-between;
}

nav a {
    color: #fff;
    margin-left: 1rem;
    text-decoration: none;
}

.hero {
    padding: 4rem 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    text-align: center;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
}

form {
    max-width: 500px;
}

label {
    display: block;
    margin-bottom: 1rem;
}

input, textarea, button {
    width: 100%;
    padding: 0.5rem;
}

button {
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
}

.success { color: green; }
.error { color: red; }
.hidden { display: none; }