*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --acento: #2563eb;
    --acento-hover: #1d4ed8;
    --acento-light: rgba(37, 99, 235, 0.06);
    --fondo: #f8f9fb;
    --blanco: #ffffff;
    --texto: #0f172a;
    --texto-sec: #64748b;
    --texto-hint: #94a3b8;
    --borde: #e2e8f0;
    --borde-focus: #cbd5e1;
    --muted: #f1f5f9;
    --exito: #059669;
    --exito-fondo: #ecfdf5;
    --error: #dc2626;
    --error-fondo: #fef2f2;
    --sombra: 0 1px 2px rgba(0,0,0,0.04);
    --sombra-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --sombra-md: 0 4px 12px rgba(0,0,0,0.06);
    --radio: 8px;
    --radio-sm: 6px;
    --trans: 0.15s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--fondo);
    color: var(--texto);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ─── Layout ─── */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.logo {
    height: 44px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.empresa-info h1 {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.empresa-info p {
    font-size: 0.8125rem;
    color: var(--texto-sec);
    margin-top: 1px;
}

.page-title {
    font-size: 1.375rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.page-subtitle {
    color: var(--texto-sec);
    font-size: 0.9375rem;
    margin-bottom: 2rem;
    line-height: 1.5;
}

/* ─── Two column layout ─── */

.layout-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 900px) {
    .layout-grid {
        grid-template-columns: 7fr 5fr;
        gap: 2.5rem;
    }
}

/* ─── Sections ─── */

.form-section {
    padding-bottom: 1.75rem;
    margin-bottom: 1.75rem;
    border-bottom: 1px solid var(--borde);
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.section-header {
    margin-bottom: 1.25rem;
}

.section-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--texto);
}

.section-desc {
    font-size: 0.8125rem;
    color: var(--texto-sec);
    margin-top: 0.25rem;
    line-height: 1.5;
}

/* ─── Form elements ─── */

.form-group {
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

label:not(.checkbox-item) {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--texto);
    margin-bottom: 0.3rem;
}

select,
input[type="text"],
input[type="email"],
input[type="tel"] {
    width: 100%;
    padding: 0.5625rem 0.75rem;
    border: 1px solid var(--borde);
    border-radius: var(--radio-sm);
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--texto);
    background: var(--blanco);
    transition: border-color var(--trans), box-shadow var(--trans);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M4.646 5.646a.5.5 0 0 1 .708 0L8 8.293l2.646-2.647a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    background-size: 1rem;
    padding-right: 2rem;
}

select:focus,
input:focus {
    outline: none;
    border-color: var(--acento);
    box-shadow: 0 0 0 3px var(--acento-light);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--texto-hint);
    margin-top: 0.3rem;
    line-height: 1.4;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
}

/* ─── Checkboxes ─── */

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4375rem 0.75rem;
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-radius: var(--radio-sm);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 450;
    transition: all var(--trans);
    user-select: none;
}

.checkbox-item:hover {
    border-color: var(--borde-focus);
}

.checkbox-item.checked {
    background: var(--acento-light);
    border-color: var(--acento);
    color: var(--acento);
}

.checkbox-item input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--acento);
    cursor: pointer;
    flex-shrink: 0;
}

.checkbox-precio {
    font-size: 0.6875rem;
    color: var(--texto-hint);
}

.checked .checkbox-precio {
    color: var(--acento);
    opacity: 0.75;
}

/* ─── Info panel (right column) ─── */

.info-panel {
    position: sticky;
    top: 2rem;
    align-self: start;
}

.info-card {
    background: var(--muted);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    padding: 1.5rem;
}

.info-card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--texto);
    margin-bottom: 0.5rem;
}

.info-card-text {
    font-size: 0.8125rem;
    color: var(--texto-sec);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.info-highlights {
    list-style: none;
    padding: 0;
}

.info-highlights li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0;
    font-size: 0.8125rem;
    color: var(--texto);
}

.info-highlights li::before {
    content: '';
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    background: var(--acento);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='white' viewBox='0 0 16 16'%3E%3Cpath d='M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 10px;
}

.info-contact {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--borde);
}

.info-contact p {
    font-size: 0.75rem;
    color: var(--texto-hint);
    margin-bottom: 0.25rem;
}

.info-contact a {
    font-size: 0.8125rem;
    color: var(--acento);
    text-decoration: none;
    font-weight: 500;
}

.info-contact a:hover {
    text-decoration: underline;
}

/* ─── Price preview ─── */

/* ─── Price card (sticky right panel) ─── */

.precio-card {
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
}

.precio-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.precio-card-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--texto-sec);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.precio-card-valor {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--texto);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.precio-card-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--exito);
    background: var(--exito-fondo);
    padding: 0.125rem 0.5rem;
    border-radius: 99px;
    margin-top: 0.375rem;
}

.precio-card-bar-wrap {
    height: 6px;
    background: var(--muted);
    border-radius: 99px;
    margin-top: 1rem;
    overflow: hidden;
}

.precio-card-bar {
    height: 100%;
    background: var(--acento);
    border-radius: 99px;
    width: 0%;
    transition: width 0.5s ease;
}

.precio-card-sep {
    height: 1px;
    background: var(--borde);
    margin: 0.875rem 0;
}

.precio-card-lines {
    list-style: none;
    padding: 0;
}

.precio-card-lines li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3125rem 0;
    font-size: 0.8125rem;
    color: var(--texto-sec);
}

.precio-card-lines li span:last-child {
    font-weight: 500;
    color: var(--texto);
    font-variant-numeric: tabular-nums;
}

.precio-card-totals {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.precio-card-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: var(--texto-sec);
}

.precio-card-row span:last-child {
    font-weight: 500;
    color: var(--texto);
    font-variant-numeric: tabular-nums;
}

.precio-card-row-total {
    margin-top: 0.25rem;
    padding-top: 0.5rem;
    border-top: 2px solid var(--texto);
}

.precio-card-row-total span {
    font-size: 0.9375rem;
    font-weight: 700 !important;
    color: var(--texto) !important;
}

/* ─── Button ─── */

.btn-enviar {
    width: 100%;
    padding: 0.75rem;
    margin-top: 1.25rem;
    background: var(--acento);
    color: #fff;
    border: none;
    border-radius: var(--radio-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--trans), box-shadow var(--trans);
    letter-spacing: 0.005em;
}

.btn-enviar:hover {
    background: var(--acento-hover);
    box-shadow: var(--sombra-md);
}

.btn-enviar:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* ─── Messages ─── */

.mensaje {
    padding: 1.25rem;
    border-radius: var(--radio);
    margin-top: 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: center;
    line-height: 1.5;
}

.mensaje.exito {
    background: var(--exito-fondo);
    color: var(--exito);
    border: 1px solid #a7f3d0;
}

.mensaje.error {
    background: var(--error-fondo);
    color: var(--error);
    border: 1px solid #fecaca;
}

/* ─── Footer ─── */

.footer {
    margin-top: 3rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--borde);
    text-align: center;
    font-size: 0.75rem;
    color: var(--texto-hint);
}

/* ─── Loading ─── */

.loading {
    display: flex;
    justify-content: center;
    padding: 4rem 0;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--borde);
    border-top-color: var(--acento);
    border-radius: 50%;
    animation: spin 0.65s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ─── Responsive ─── */

@media (max-width: 640px) {
    .container {
        padding: 1.25rem 1rem;
    }

    .header {
        gap: 0.75rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .checkbox-group {
        flex-direction: column;
    }

    .checkbox-item {
        width: 100%;
    }

    .precio-preview {
        flex-direction: column;
        text-align: center;
    }
}