* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f7fb;
    color: #1f2937;
}

.form-page {
    width: 100%;
    padding: 40px 15px;
}

.contenedor-principal {
    max-width: 950px;
    margin: 0 auto;
}

.btn-regresar {
    display: inline-block;
    margin-bottom: 18px;
    background: #1d4ed8;
    color: #fff;
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    transition: background 0.2s ease;
}

.btn-regresar:hover {
    background: #1e40af;
}

.contenedor {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    overflow: hidden;
}

.cabecera {
    background: linear-gradient(135deg, #0f4c81, #2563eb);
    color: #fff;
    padding: 30px 35px;
}

.cabecera h1 {
    margin: 0 0 10px;
    font-size: 34px;
    line-height: 1.2;
}

.cabecera p {
    margin: 0;
    font-size: 16px;
    opacity: 0.95;
}

.contenido {
    padding: 30px 35px;
}

.bloque-info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 25px;
}

.bloque-info strong {
    display: block;
    margin-bottom: 8px;
    color: #1e3a8a;
}

.bloque-info p {
    margin: 0 0 12px;
}

.btn-descargar {
    display: inline-block;
    background: #16a34a;
    color: #fff;
    text-decoration: none;
    padding: 12px 18px;
    border-radius: 8px;
    font-weight: bold;
    transition: background 0.2s ease;
}

.btn-descargar:hover {
    background: #15803d;
}

.formulario {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px 20px;
}

.campo {
    display: flex;
    flex-direction: column;
}

.campo-full {
    grid-column: 1 / -1;
}

label {
    font-weight: bold;
    margin-bottom: 8px;
    color: #111827;
}

input[type="text"],
input[type="email"],
input[type="file"],
textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font-size: 15px;
    background: #fff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="file"]:focus,
textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.ayuda {
    display: block;
    margin-top: 8px;
    color: #6b7280;
    font-size: 13px;
}

.acciones {
    grid-column: 1 / -1;
    text-align: center;
    margin-top: 10px;
}

.btn-enviar {
    background: #2563eb;
    color: #fff;
    border: none;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    min-width: 220px;
    transition: background 0.2s ease, transform 0.1s ease;
}

.btn-enviar:hover {
    background: #1d4ed8;
}

.btn-enviar:active {
    transform: scale(0.98);
}

.nota-final {
    margin-top: 22px;
    font-size: 14px;
    color: #4b5563;
    text-align: center;
}

@media (max-width: 768px) {
    .cabecera,
    .contenido {
        padding: 22px 18px;
    }

    .cabecera h1 {
        font-size: 26px;
    }

    .formulario {
        grid-template-columns: 1fr;
    }

    .campo-full {
        grid-column: auto;
    }
}