:root {
    --primary-color: #0b2545;
    --secondary-color: #134074;
    --accent-color: #8da9c4;
    --text-dark: #1d2d44;
    --text-light: #f4f6f9;
    --white: #ffffff;
    --danger: #d90429;
    --success: #2b9348;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-stack); color: var(--text-dark); background-color: #f8f9fa; line-height: 1.6; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* HEADER */
.main-header { background-color: var(--primary-color); padding: 20px 0; border-bottom: 3px solid var(--accent-color); }
.header-flex { display: flex; justify-content: space-between; align-items: center; }
.logo a { font-size: 24px; font-weight: 800; text-decoration: none; }
.brand-main { color: var(--white); }
.brand-sub { color: var(--accent-color); }
.main-nav a { color: var(--text-light); text-decoration: none; margin-left: 20px; font-weight: 600; }
.main-nav a:hover, .main-nav a.active { color: var(--accent-color); }

/* MAQUETACIÓN FORMULARIO */
.page-content { padding: 60px 20px; display: flex; justify-content: center; }
.form-container { background-color: var(--white); padding: 40px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.08); width: 100%; max-width: 700px; }
.form-container h1 { font-size: 28px; color: var(--primary-color); margin-bottom: 15px; }
.form-instruction { color: #666; font-size: 14px; margin-bottom: 30px; text-align: justify; }

.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 8px; font-size: 14px; color: var(--primary-color); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 4px; font-family: var(--font-stack); font-size: 15px; transition: border-color 0.2s ease; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--secondary-color); }
.field-help { display: block; margin-top: 5px; color: #888; font-size: 12px; }

.btn-submit { background-color: var(--secondary-color); color: var(--white); border: none; padding: 15px 30px; font-size: 16px; font-weight: 700; border-radius: 4px; cursor: pointer; width: 100%; transition: background-color 0.3s ease; }
.btn-submit:hover { background-color: var(--primary-color); }

/* ALERTAS VALIDACIÓN */
.error-box { background-color: #f8d7da; color: #721c24; padding: 15px; border-radius: 4px; margin-bottom: 25px; font-size: 14px; border-left: 5px solid var(--danger); }
.success-box { background-color: #d4edda; color: #155724; padding: 15px; border-radius: 4px; margin-bottom: 25px; font-size: 14px; border-left: 5px solid var(--success); }

/* FOOTER */
.main-footer { background-color: #111; color: #aaa; padding: 60px 0 30px 0; font-size: 14px; margin-top: 80px; }
.footer-disclaimer { border-bottom: 1px solid #222; padding-bottom: 30px; margin-bottom: 30px; text-align: justify; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-links a { color: #aaa; text-decoration: none; margin-left: 15px; }
.footer-links a:hover { color: var(--white); }

@media (max-width: 768px) {
    .header-flex, .footer-bottom { flex-direction: column; text-align: center; }
    .main-nav { margin-top: 15px; }
    .form-container { padding: 25px; }
}