.budget-page #presupuestar {
    background: radial-gradient(ellipse at 0 0, #eee8ff, transparent 55%), var(--bg);
    padding: clamp(2rem, 5vw, 4rem) 1.5rem;
}
.budget-page .budget-layout {
    max-width: 1200px;
    display: grid;
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.3fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
    text-align: left;
}
.budget-intro h1 { font-size: clamp(2rem, 3.5vw, 3rem); line-height: 1.25; letter-spacing: -.05em; margin: 1.25rem 0; }
.budget-intro h1 span { color: var(--violet); }
.budget-intro .section-lead { margin: 0 0 2rem; font-size: 1rem; line-height: 1.8; }
.budget-intro .quote-back { margin-bottom: 2rem; }
.budget-guide { padding: 1.5rem; background: #f2edff; border: 1px solid #e3d9fc; border-radius: 22px; margin-bottom: 1.5rem; }
.budget-guide h2 { font-size: 1rem; line-height: 1.6; }
.budget-guide p, .budget-guide li { font-size: .88rem; line-height: 1.8; color: #5c5367; }
.budget-guide ul { padding-left: 1.2rem; margin: 1rem 0; }
.budget-guide li::marker { color: var(--violet); }
.budget-note { display: block; padding-top: 1rem; border-top: 1px solid #ddd1f6; color: var(--violet-dark); font-size: .78rem; font-weight: 600; line-height: 1.7; }
.budget-form-panel { min-width: 0; background: var(--paper); border: 1px solid var(--line); border-radius: 24px; padding: clamp(1.25rem, 3vw, 2.5rem); box-shadow: 0 16px 48px #32245a08; }
.budget-page .form-section-title { display: flex; align-items: center; gap: .8rem; font-size: 1rem; padding-top: 1.75rem; margin: 1.5rem 0 1rem; }
.budget-page .form-section-title:first-of-type { border-top: 0; margin-top: .5rem; padding-top: .5rem; }
.budget-page .form-section-title > span { display: inline-grid; place-items: center; flex: 0 0 38px; height: 38px; background: var(--violet-tint); color: var(--violet-dark); border-radius: 12px; font-family: "Montserrat", sans-serif; font-size: .85rem; }
.budget-page .quote-form input:not([type="checkbox"]):not([type="radio"]), .budget-page .quote-form textarea { border-color: #d9d3e2; border-radius: 12px; min-height: 48px; background: #fdfcfe; }
.budget-page .quote-form [aria-invalid="true"] { border-color: var(--danger) !important; }
.budget-page .quote-form .choice-card { border-radius: 12px; }
.budget-page .choice-card:has(input:checked) { background: #f2edff; border-color: var(--violet); box-shadow: inset 3px 0 var(--violet); }
.budget-page .quote-form button { width: 100%; justify-content: center; min-height: 52px; }
.budget-page .contact-alternative { text-align: center; }
@media (max-width: 900px) {
    .budget-page .budget-layout { grid-template-columns: minmax(0, 1fr); max-width: 720px; }
    .budget-intro h1 { max-width: 580px; }
}
@media (max-width: 480px) {
    .budget-page #presupuestar { padding: 1.5rem 1rem 3rem; }
    .budget-page .form-section-title { font-size: .9rem; }
    .budget-form-panel { border-radius: 18px; }
}