/* ============================================================
   Nexvelia · Componentes reutilizables
   Nav, botones, tarjetas, formulario, footer.
   ============================================================ */

/* ----- NAV ------------------------------------------------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 247, 240, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base), background var(--t-base);
}
.site-nav.is-scrolled { border-bottom-color: var(--line); }
.site-nav-inner {
  max-width: var(--w-container);
  margin-inline: auto;
  padding: var(--s-5) var(--s-6);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-6);
}
.brand { display: flex; align-items: center; gap: var(--s-3); }
.brand-mark { width: 36px; height: 36px; }
.brand-name { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.28em; font-size: var(--fs-14); color: var(--ink); }

.nav-links { display: none; align-items: center; gap: var(--s-8); }
.nav-link { font-size: var(--fs-14); color: var(--ink); padding: var(--s-2) 0; position: relative; }
.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 0; height: 1px; background: var(--ink); transition: width var(--t-base);
}
.nav-link:hover::after, .nav-link[aria-current="page"]::after { width: 100%; }

.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--r-sm);
}
.nav-toggle-icon { width: 22px; height: 2px; background: var(--ink); position: relative; }
.nav-toggle-icon::before, .nav-toggle-icon::after {
  content: ''; position: absolute; left: 0; right: 0; height: 2px; background: var(--ink);
}
.nav-toggle-icon::before { top: -7px; }
.nav-toggle-icon::after  { top:  7px; }

@media (min-width: 880px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
}

/* Mobile drawer */
.nav-drawer {
  position: fixed; inset: 0;
  background: var(--bg);
  padding: var(--s-20) var(--s-6) var(--s-8);
  display: flex; flex-direction: column; gap: var(--s-6);
  transform: translateX(100%); transition: transform var(--t-base);
  z-index: 60;
}
.nav-drawer.is-open { transform: translateX(0); }
.nav-drawer .nav-link { font-size: var(--fs-24); font-family: var(--font-display); font-weight: 500; }
.nav-drawer-close { position: absolute; top: var(--s-5); right: var(--s-6); width: 40px; height: 40px; font-size: 28px; }

/* ----- BOTONES --------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--s-2);
  font-family: var(--font-body); font-size: var(--fs-14); font-weight: 500;
  padding: var(--s-3) var(--s-6); border-radius: var(--r-sm);
  transition: background var(--t-base), color var(--t-base), transform var(--t-fast);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--accent); }
.btn-accent  { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); }
.btn-ghost   { color: var(--ink); padding-inline: 0; border-bottom: 1px solid var(--ink); border-radius: 0; }
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); transform: none; }

/* ----- TARJETAS ------------------------------------------- */
.card {
  background: var(--bg-card);
  border-radius: var(--r-xl);
  padding: var(--s-8);
  transition: transform var(--t-base), box-shadow var(--t-base);
}
.card-link { display: block; color: inherit; }
.card-link:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-num { font-family: var(--font-display); font-size: var(--fs-13); color: var(--ink-muted); font-weight: 500; margin-bottom: var(--s-5); }
.card-title { font-family: var(--font-display); font-size: var(--fs-24); font-weight: 600; letter-spacing: -0.02em; margin-bottom: var(--s-3); }
.card-desc { font-size: var(--fs-14); color: var(--ink-muted); line-height: 1.6; }
.card-arrow { display: inline-block; margin-top: var(--s-6); color: var(--accent); font-size: var(--fs-18); }

/* ----- FORMULARIO ----------------------------------------- */
.form { display: grid; gap: var(--s-5); }
.field { display: grid; gap: var(--s-2); }
.field-row { display: grid; gap: var(--s-5); }
@media (min-width: 640px) { .field-row { grid-template-columns: 1fr 1fr; } }

.field label {
  font-size: var(--fs-12); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-muted); font-weight: 500;
}
.field label .required { color: var(--c-error); margin-left: 2px; }

.input, .textarea, .select {
  font-family: var(--font-body); font-size: var(--fs-16); color: var(--ink);
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: var(--s-3) var(--s-4); width: 100%;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.input:focus, .textarea:focus, .select:focus { border-color: var(--accent); background: #fff; outline: none; box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }
.textarea { min-height: 140px; resize: vertical; line-height: 1.5; }

.field-error { color: var(--c-error); font-size: var(--fs-13); display: none; }
.field.has-error .input,
.field.has-error .textarea,
.field.has-error .select { border-color: var(--c-error); }
.field.has-error .field-error { display: block; }

/* Honeypot · invisible para humanos, accesible para bots ingenuos */
.hp-field { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

.checkbox-field { display: flex; align-items: flex-start; gap: var(--s-3); font-size: var(--fs-14); color: var(--ink-muted); }
.checkbox-field input { margin-top: 2px; accent-color: var(--accent); width: 18px; height: 18px; flex-shrink: 0; }
.checkbox-field a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

.form-message {
  padding: var(--s-4) var(--s-5); border-radius: var(--r-md);
  font-size: var(--fs-14); display: none;
}
.form-message.is-visible { display: block; }
.form-message-success { background: rgba(4, 120, 87, 0.08); color: var(--c-success); border: 1px solid rgba(4, 120, 87, 0.2); }
.form-message-error   { background: rgba(185, 28, 28, 0.08); color: var(--c-error); border: 1px solid rgba(185, 28, 28, 0.2); }

.form button[type="submit"] { justify-self: start; }
.form button[type="submit"][disabled] { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ----- FOOTER --------------------------------------------- */
.site-footer {
  background: var(--bg-dark);
  color: var(--c-arena-200);
  padding: var(--s-20) 0 var(--s-8);
  margin-top: var(--s-24);
}
.footer-grid {
  display: grid; gap: var(--s-10);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--s-12); }
}
.footer-brand-name { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.32em; font-size: var(--fs-14); margin-block: var(--s-5) var(--s-3); }
.footer-blurb { font-size: var(--fs-14); color: var(--c-tinta-300); line-height: 1.6; max-width: 320px; }
.site-footer h4 { margin-bottom: var(--s-5); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer ul li { margin-bottom: 6px; font-size: var(--fs-14); line-height: 1.3; color: var(--c-tinta-300); }
.site-footer ul a { color: var(--c-tinta-300); transition: color var(--t-fast); }
.site-footer ul a:hover { color: var(--c-azul-300); }

/* ----- FLOATING WHATSAPP BUTTON --------------------------- */
.wa-fab {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: clamp(16px, 3vw, 28px);
  width: 60px; height: 60px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(15,30,61,0.18), 0 2px 6px rgba(15,30,61,0.12);
  z-index: 90;
  transition: transform var(--t-fast), box-shadow var(--t-fast), background-color var(--t-fast);
}
.wa-fab:hover {
  background: #1ebe5b;
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(15,30,61,0.22), 0 4px 10px rgba(15,30,61,0.14);
}
.wa-fab:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(37,211,102,0.35), 0 8px 24px rgba(15,30,61,0.18);
}
.wa-fab svg { width: 32px; height: 32px; fill: currentColor; }
@media (prefers-reduced-motion: reduce) {
  .wa-fab, .wa-fab:hover { transition: none; transform: none; }
}

.footer-bottom {
  margin-top: var(--s-12); padding-top: var(--s-6);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex; flex-wrap: wrap; gap: var(--s-4); justify-content: space-between;
  font-size: var(--fs-12); color: var(--c-tinta-300);
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: var(--c-arena-200); }
.footer-legal-links { display: flex; gap: var(--s-5); flex-wrap: wrap; }

/* ----- CONTACTO (sección reutilizable) -------------------- */
.contact {
  background: var(--bg-dark);
  color: var(--c-arena-200);
  border-radius: var(--r-2xl);
  padding: clamp(var(--s-10), 6vw, var(--s-16));
}
.contact-inner {
  display: grid; gap: var(--s-10);
  grid-template-columns: 1fr;
}
@media (min-width: 960px) {
  .contact-inner { grid-template-columns: 1fr 1.2fr; gap: var(--s-16); }
}
.contact-side .eyebrow { color: var(--c-azul-300); }
.contact-side h2 { color: var(--c-arena-200); margin-block: var(--s-4) var(--s-6); }
.contact-side p { color: var(--c-tinta-300); font-size: var(--fs-16); line-height: 1.6; margin-bottom: var(--s-8); }
.contact-meta { display: grid; gap: var(--s-4); }
.contact-meta-item { display: flex; gap: var(--s-4); align-items: center; font-size: var(--fs-14); }
.contact-meta-item strong { color: var(--c-azul-300); display: block; font-size: var(--fs-12); letter-spacing: 0.2em; text-transform: uppercase; font-weight: 500; margin-bottom: 2px; }
.contact-meta-item a { color: var(--c-arena-200); display: block; }
.contact-meta-item a:hover { color: var(--c-azul-300); }
.contact-meta-item a + a { margin-top: 2px; }

/* Form sobre fondo oscuro */
.contact .form label { color: var(--c-tinta-300); }
.contact .input, .contact .textarea, .contact .select {
  background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.12); color: var(--c-arena-200);
}
.contact .input::placeholder, .contact .textarea::placeholder { color: var(--c-tinta-500); }
.contact .input:focus, .contact .textarea:focus, .contact .select:focus {
  background: rgba(255,255,255,0.06); border-color: var(--c-azul-400);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
}
/* Opciones del select · deben verse al desplegar (fondo cream, texto azul) */
.contact .select option {
  background: var(--c-arena-100);
  color: var(--c-azul-600);
  font-weight: 500;
}
.contact .select option:disabled,
.contact .select option[value=""] {
  color: var(--c-tinta-500);
}
.contact .checkbox-field { color: var(--c-tinta-300); }
.contact .checkbox-field a { color: var(--c-arena-200); }
.contact .btn-accent { background: var(--c-arena-200); color: var(--ink); }
.contact .btn-accent:hover { background: #fff; }

/* ----- LIGHTBOX (imágenes ampliables · data-zoomable) ----- */
img.is-zoomable { cursor: zoom-in; }
img.is-zoomable:focus-visible { outline: none; box-shadow: var(--focus-ring); }

body.lb-lock { overflow: hidden; }

.lb-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: none;
  align-items: center; justify-content: center;
  gap: var(--s-2);
  padding: clamp(var(--s-4), 4vw, var(--s-10));
  background: rgba(8, 16, 33, 0.92);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.lb-overlay.is-open { display: flex; }

.lb-figure {
  margin: 0;
  max-width: min(1100px, 94vw);
  max-height: 90vh;
  display: flex; flex-direction: column; align-items: center; gap: var(--s-4);
}
.lb-img {
  max-width: 100%;
  max-height: 80vh;
  width: auto; height: auto;
  object-fit: contain;
  border-radius: var(--r-md);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.7);
  background: var(--c-tinta-900);
}
.lb-caption {
  color: var(--c-arena-200);
  font-size: var(--fs-14);
  text-align: center;
  max-width: 60ch;
  line-height: 1.5;
}

.lb-close, .lb-nav {
  flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.10);
  color: var(--c-arena-100);
  border-radius: 50%;
  transition: background var(--t-fast), transform var(--t-fast);
}
.lb-close:hover, .lb-nav:hover { background: rgba(255,255,255,0.22); }
.lb-close:active, .lb-nav:active { transform: scale(0.94); }
.lb-close:focus-visible, .lb-nav:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(96,165,250,0.6); }

.lb-close {
  position: absolute; top: clamp(12px, 3vw, 24px); right: clamp(12px, 3vw, 24px);
  width: 44px; height: 44px;
  font-size: 30px; line-height: 1;
}
.lb-nav {
  width: 48px; height: 48px;
  font-size: 30px; line-height: 1;
}
.lb-nav[hidden] { display: none; }

@media (max-width: 620px) {
  .lb-overlay { flex-direction: column; }
  .lb-nav { position: absolute; bottom: clamp(12px, 4vw, 28px); }
  .lb-prev { left: 28%; }
  .lb-next { right: 28%; }
}
@media (prefers-reduced-motion: reduce) {
  .lb-close, .lb-nav { transition: none; }
}