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

:root {
  --rojo:         #B8232A;
  --rojo-oscuro:  #8B1A1E;
  --fondo:        #F5EDE8;
  --fondo-card:   #FAF5F2;
  --fondo-oscuro: #1A1210;
  --borde:        #D9CBBF;
  --borde-fuerte: #C4B2A2;
  --texto:        #1A1210;
  --texto-medio:  #5A4A42;
  --texto-suave:  #9A8880;
  --texto-on-accent: #FAF5F2;
  --font-display: 'Saira Condensed', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;
}

html.theme-dark {
  --rojo:         #C12C33;
  --rojo-oscuro:  #981F24;
  --fondo:        #181110;
  --fondo-card:   #261C19;
  --fondo-oscuro: #120C0B;
  --borde:        #3E2D28;
  --borde-fuerte: #5D443B;
  --texto:        #F5EDE8;
  --texto-medio:  #D2C0B6;
  --texto-suave:  #A18D84;
  --texto-on-accent: #F5EDE8;
  color-scheme: dark;
}

html { scroll-behavior: smooth; }

body {
  background: var(--fondo); color: var(--texto);
  font-family: var(--font-body); font-weight: 400;
  overflow-x: hidden; min-width: 320px;
  display: flex; flex-direction: column; min-height: 100vh;
}
body.scroll-locked { overflow: hidden; }
main { flex: 1; }

/* ── THEME TOGGLE ── */
.theme-toggle-wrap {
  position: absolute;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}
.nav-theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  padding: 0;
  background: rgba(255,255,255,0.04);
  color: var(--texto-medio);
  border: 1px solid var(--borde);
  border-radius: 50%;
  cursor: pointer;
  font-family: var(--font-body);
  transition: color 0.2s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.nav-theme-toggle:hover {
  color: var(--texto);
  border-color: var(--borde-fuerte);
  background: rgba(255,255,255,0.08);
}
.toggle-icon {
  position: absolute;
  width: 17px;
  height: 17px;
  transition: opacity 0.22s ease, color 0.22s ease, transform 0.22s ease;
}
.toggle-moon {
  opacity: 0;
  transform: rotate(-18deg) scale(0.88);
}
.toggle-sun {
  opacity: 1;
  color: var(--texto);
  transform: rotate(0deg) scale(1);
}
.nav-theme-toggle[aria-pressed="true"] .toggle-moon {
  opacity: 1;
  color: var(--texto);
  transform: rotate(0deg) scale(1);
}
.nav-theme-toggle[aria-pressed="true"] .toggle-sun {
  opacity: 0;
  transform: rotate(18deg) scale(0.88);
}

/* ═══════════════════════════════════════
   HERO CONSTRUCCIÓN
═══════════════════════════════════════ */
.obras-page {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 2rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 80% at 50% 50%, rgba(184,35,42,0.07) 0%, transparent 65%),
    var(--fondo);
}
.obras-page::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(90,74,66,0.04) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(90,74,66,0.04) 40px);
}
.obras-inner { position: relative; z-index: 1; max-width: 650px; }
.obras-eyebrow {
  display: inline-block;
  font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--rojo); border-left: 3px solid var(--rojo);
  padding-left: 0.8rem; margin-bottom: 2rem;
  animation: obrasFadeUp 0.6s ease both 0.1s;
}
.obras-titulo {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.92; letter-spacing: 0.02em;
  color: var(--texto); margin-bottom: 1.2rem;
  animation: obrasFadeUp 0.6s ease both 0.2s;
}
.obras-titulo em { font-style: normal; color: var(--rojo); }
.obras-desc {
  font-size: 1rem; line-height: 1.75;
  color: var(--texto-medio);
  max-width: 500px; margin: 0 auto 2.5rem;
  font-weight: 400;
  animation: obrasFadeUp 0.6s ease both 0.35s;
}
.obras-divider {
  width: 48px; height: 3px; background: var(--rojo);
  margin: 0 auto 2.5rem;
  animation: obrasFadeIn 0.8s ease both 0.5s;
}
.obras-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  animation: obrasFadeUp 0.6s ease both 0.55s;
}

/* WhatsApp ghost button */
.obras-whatsapp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border: 2px solid rgba(37, 211, 102, 0.5);
  color: #25D366;
  width: 48px;
  height: 48px;
  padding: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  background: transparent;
  border-radius: 999px;
  overflow: hidden;
  white-space: nowrap;
  transition: width 0.28s ease, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.obras-whatsapp-btn:hover {
  border-color: #25D366;
  background: rgba(37, 211, 102, 0.08);
  width: 152px;
  box-shadow: 0 8px 20px rgba(37, 211, 102, 0.22);
}
.obras-whatsapp-btn:focus-visible {
  outline: 2px solid #25D366;
  outline-offset: 3px;
  width: 152px;
}
.obras-whatsapp-btn img {
  flex-shrink: 0;
  filter: brightness(0) saturate(100%) invert(56%) sepia(97%) saturate(415%) hue-rotate(85deg) brightness(97%) contrast(93%);
  width: 20px; height: 20px;
  display: block;
}
.obras-whatsapp-btn-text {
  opacity: 0;
  max-width: 0;
  margin-left: 0;
  transform: translateX(-6px);
  transition: opacity 0.22s ease, max-width 0.28s ease, margin-left 0.28s ease, transform 0.22s ease;
}
.obras-whatsapp-btn:hover .obras-whatsapp-btn-text,
.obras-whatsapp-btn:focus-visible .obras-whatsapp-btn-text {
  opacity: 1;
  max-width: 90px;
  margin-left: 0.45rem;
  transform: translateX(0);
}

/* Outline button */
.obras-outline-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border: 2px solid var(--rojo);
  color: var(--rojo);
  padding: 1rem 2rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  background: transparent;
  border-radius: 2px;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.2s, color 0.2s, transform 0.18s;
}
.obras-outline-btn:hover {
  background: var(--rojo);
  color: var(--texto-on-accent);
  transform: translateY(-1px);
}

.obras-logo-mark {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
  animation: obrasFadeIn 1s ease both 0.8s;
}
.obras-logo-mark img {
  width: min(200px, 42vw);
  height: auto;
  user-select: none;
  pointer-events: none;
}
html.theme-dark .obras-logo-mark img {
  filter: brightness(0) invert(1);
}
.obras-deco-text {
  position: absolute; bottom: -2rem; left: 50%; transform: translateX(-50%);
  font-family: var(--font-display); font-size: clamp(6rem, 18vw, 16rem);
  font-weight: 700; letter-spacing: 0.05em;
  color: rgba(184,35,42,0.04); white-space: nowrap;
  pointer-events: none; line-height: 1; user-select: none;
}

@keyframes obrasFadeUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
@keyframes obrasFadeIn { from{opacity:0} to{opacity:1} }

/* ═══════════════════════════════════════
   MODAL
═══════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(26,18,16,0.65);
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
  overflow-y: auto;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.open {
  opacity: 1; pointer-events: all;
}
.modal-box {
  background: var(--fondo-card);
  border: 1px solid var(--borde);
  border-radius: 3px;
  width: 100%; max-width: 480px;
  max-height: min(88svh, 720px);
  overflow: auto;
  padding: 2.5rem 2.5rem 2rem;
  position: relative;
  transform: translateY(16px);
  transition: transform 0.25s ease;
  box-shadow: 0 24px 60px rgba(26,18,16,0.18);
}
.modal-overlay.open .modal-box {
  transform: translateY(0);
}
.modal-close {
  position: absolute; top: 1rem; right: 1rem;
  background: none; border: none; cursor: pointer;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  color: var(--texto-suave);
  font-size: 1.2rem; line-height: 1;
  transition: color 0.2s;
  border-radius: 2px;
}
.modal-close:hover { color: var(--rojo); }
.modal-eyebrow {
  font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--rojo); border-left: 3px solid var(--rojo);
  padding-left: 0.7rem; margin-bottom: 0.7rem; display: block;
}
.modal-title {
  font-family: var(--font-display);
  font-size: 1.9rem; letter-spacing: 0.03em; line-height: 1;
  color: var(--texto); margin-bottom: 0.5rem;
}
.modal-title em { font-style: normal; color: var(--rojo); }
.modal-desc {
  font-size: 0.88rem; color: var(--texto-medio);
  line-height: 1.6; margin-bottom: 1.6rem; font-weight: 400;
}
.modal-form { display: flex; flex-direction: column; gap: 0.85rem; }
.modal-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--texto-medio);
}
.form-group input,
.form-group textarea {
  background: var(--fondo); border: 1px solid var(--borde);
  border-radius: 2px; color: var(--texto); font-family: var(--font-body);
  font-size: 0.95rem; padding: 0.75rem 1rem;
  outline: none; transition: border-color 0.2s; width: 100%;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--rojo); }
.form-group textarea {
  resize: vertical;
  min-height: 90px;
}
.modal-submit {
  background: var(--rojo); color: var(--texto-on-accent);
  border: none; padding: 0.85rem 1.5rem;
  font-family: var(--font-body); font-size: 0.82rem;
  letter-spacing: 0.12em; text-transform: uppercase; font-weight: 500;
  border-radius: 2px; cursor: pointer;
  transition: background 0.2s; width: 100%; margin-top: 0.3rem;
}
.modal-submit:hover { background: var(--rojo-oscuro); }
.modal-footer-note {
  margin-top: 1rem;
  font-size: 0.74rem;
  color: var(--texto-suave);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.modal-whatsapp-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #25D366;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease;
}
.modal-whatsapp-link:hover {
  transform: scale(1.05);
}
.modal-whatsapp-link img {
  width: 16px;
  height: 16px;
  display: block;
}

/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
footer {
  background: var(--fondo-oscuro);
  padding: 3rem 4rem;
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 1.5rem;
}
.footer-logo img {
  height: 38px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}
footer p { font-size: 0.8rem; color: rgba(245,237,232,0.60); font-weight: 400; }
.footer-socials { display: flex; gap: 0.9rem; }
.footer-socials a {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(245,237,232,0.28);
  border-radius: 50%;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.footer-socials a img {
  width: 16px;
  height: 16px;
  display: block;
  object-fit: contain;
  filter: brightness(0) invert(1);
}
.footer-socials a:hover {
  border-color: var(--rojo);
  background: rgba(184,35,42,0.15);
  transform: translateY(-1px);
}

/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 960px) {
  .obras-deco-text { font-size: 5rem; }
  footer { flex-direction: column; text-align: center; padding: 2rem clamp(1.25rem, 5vw, 4rem); }
}
@media (max-width: 600px) {
  .obras-page { padding: 5rem 1.25rem 1.5rem; }
  .obras-titulo { font-size: clamp(2.5rem, 12vw, 3.5rem); }
  .obras-actions { flex-direction: column; width: 100%; }
  .obras-whatsapp-btn,
  .obras-outline-btn { width: 100%; justify-content: center; }
  .modal-overlay { padding: 1rem; }
  .modal-box { max-height: calc(100svh - 2rem); padding: 1.9rem 1.5rem 1.5rem; }
  .modal-close { top: 0.75rem; right: 0.75rem; }
  .modal-eyebrow { font-size: 0.66rem; margin-bottom: 0.6rem; }
  .modal-title { font-size: 1.6rem; margin-bottom: 0.45rem; }
  .modal-desc { font-size: 0.86rem; line-height: 1.55; margin-bottom: 1.1rem; }
  .modal-form { gap: 0.75rem; }
  .modal-form-row { grid-template-columns: 1fr; }
  .form-group input,
  .form-group textarea { padding: 0.72rem 0.85rem; font-size: 0.86rem; }
  .form-group textarea { min-height: 88px; }
  .modal-submit { padding: 0.82rem 1.15rem; font-size: 0.77rem; letter-spacing: 0.11em; margin-top: 0.2rem; }
  .modal-footer-note { margin-top: 0.85rem; font-size: 0.72rem; gap: 0.45rem; }
  .modal-whatsapp-link { font-size: 0.76rem; }
  .modal-whatsapp-link img { width: 14px; height: 14px; }
  footer { padding: 2rem 1.25rem; }
}
@media (max-width: 390px) {
  .obras-page { padding: 4.5rem 1rem 1.25rem; }
  .obras-titulo { font-size: 2.2rem; }
  .obras-desc { font-size: 0.9rem; }
  .obras-whatsapp-btn,
  .obras-outline-btn { font-size: 0.78rem; padding: 0.85rem 1.4rem; }
  .modal-overlay { padding: 0.8rem; }
  .modal-box { max-height: calc(100svh - 1.6rem); padding: 1.7rem 1.2rem 1.3rem; }
  .modal-title { font-size: 1.46rem; }
  .modal-desc { font-size: 0.82rem; }
  .modal-submit { font-size: 0.74rem; }
  .modal-whatsapp-link { font-size: 0.74rem; }
}
@media (max-width: 380px) {
  .obras-whatsapp-btn,
  .obras-outline-btn { width: 100%; justify-content: center; }
  .modal-box { max-height: calc(100svh - 1.4rem); padding: 1.6rem 1.05rem 1.2rem; }
}