.validacion-section {
    padding: 70px 24px 90px;
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}

.validacion-header {
    max-width: 900px;
    margin: 0 auto 45px;
    text-align: center;
}

    .validacion-header span {
        color: #c89b43;
        font-size: 13px;
        font-weight: 900;
        letter-spacing: 4px;
        text-transform: uppercase;
    }

    .validacion-header h1 {
        color: #17365d;
        font-size: 46px;
        font-weight: 900;
        margin: 14px 0 14px;
    }

    .validacion-header p {
        color: #4b5563;
        font-size: 18px;
        line-height: 1.7;
    }

.validacion-grid {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.validacion-card {
    background: #fff;
    border-radius: 28px;
    padding: 28px;
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.10);
    border: 1px solid rgba(23, 54, 93, 0.08);
}

.card-title h2 {
    color: #17365d;
    font-size: 28px;
    font-weight: 900;
    margin: 0 0 8px;
}

.card-title p {
    color: #5f6775;
    font-size: 16px;
    margin-bottom: 22px;
}

.iframe-box {
    width: 100%;
    height: 360px;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid #e5e7eb;
    background: #fef8f5;
}

    .iframe-box iframe {
        width: 100%;
        height: 100%;
        border: none;
    }

.codigo-box {
    display: flex;
    gap: 14px;
    margin-bottom: 18px;
}

.codigo-input {
    flex: 1;
    height: 52px;
    border-radius: 14px;
    border: 1px solid #d1d5db;
    padding: 0 16px;
    font-size: 16px;
    outline: none;
}

    .codigo-input:focus {
        border-color: #17365d;
        box-shadow: 0 0 0 4px rgba(23, 54, 93, 0.12);
    }

.btn-validar {
    height: 52px;
    padding: 0 28px;
    border-radius: 14px;
    border: none;
    background: #17365d;
    color: #fff;
    font-weight: 800;
    cursor: pointer;
}

    .btn-validar:hover {
        background: #073b75;
    }

.mensaje-error {
    display: block;
    color: #b91c1c;
    font-weight: 700;
    margin-bottom: 14px;
}

.pdf-panel {
    margin-top: 20px;
}

.pdf-frame {
    width: 100%;
    height: 720px;
    border: 1px solid #d1d5db;
    border-radius: 20px;
    background: #fff;
}

@media (max-width: 768px) {
    .validacion-header h1 {
        font-size: 34px;
    }

    .codigo-box {
        flex-direction: column;
    }

    .btn-validar {
        width: 100%;
    }

    .pdf-frame {
        height: 560px;
    }
}


.mensaje-error {
    display: block;
    margin-top: 15px;
    padding: 12px 18px;
    background: #fff3f3;
    border: 1px solid #f1b5b5;
    color: #b91c1c;
    border-radius: 12px;
    font-weight: 600;
}