app/static/style.css

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f7fa;
    color: #333;
}

nav {
    background: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

nav h1 {
    font-size: 1.5rem;
    margin-right: auto;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

nav a:hover {
    background: #34495e;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #555;
}

.form-group input {
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
}

.btn {
    background: #3498db;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

.actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

h2 {
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

p {
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .actions {
        flex-direction: column;
    }
    
    nav {
        flex-wrap: wrap;
    }
}