:root {
    --olive: #6b8e23;
    --blue: #1e3a5f;
    --yellow: #f4d35e;
    --danger: #b00020;
    --text-dark: #333;
}

* {
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--blue), var(--olive));
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.register-container {
    background: #fff;
    width: 100%;
    max-width: 480px;
    padding: 2rem;
    border-radius: 18px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

h1 {
    text-align: center;
    color: var(--blue);
    margin-bottom: 1.4rem;
}

.message {
    background: #ffecec;
    color: var(--danger);
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1.2rem;
    font-size: 0.9rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.1rem;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

input {
    width: 100%;
    padding: 0.7rem;
    border-radius: 8px;
    border: 2px solid #ddd;
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--yellow);
    box-shadow: 0 0 0 3px rgba(244, 211, 94, 0.4);
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 0.5rem;
}

.btn {
    padding: 0.8rem;
    border-radius: 10px;
    border: none;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
}

.btn.primary {
    background: var(--olive);
    color: #fff;
}

.btn.primary:hover {
    background: #5f7f1e;
}

.btn.secondary {
    background: var(--blue);
    color: #fff;
}

.btn.secondary:hover {
    background: #152c47;
}

.links {
    margin-top: 1.4rem;
    text-align: center;
    font-size: 0.9rem;
}

.links a {
    color: var(--blue);
    font-weight: 600;
    text-decoration: none;
}

.links a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .register-container {
        padding: 1.5rem;
    }
}