/* ============================================
   eficienciaedificio.es — Estilos principales
   Estilo: Cálido, cercano, profesional
   ============================================ */

/* VARIABLES */
:root {
  --verde: #3D6B35;
  --verde-oscuro: #2A4A24;
  --verde-claro: #EBF3E8;
  --crema: #F7F3EC;
  --crema-claro: #FBF9F5;
  --ambar: #C4873A;
  --ambar-oscuro: #A06A28;
  --gris-calido: #6B6259;
  --carbon: #2C2C2C;
  --borde: #E2D9CC;
  --blanco: #FFFFFF;
  --sombra: 0 2px 16px rgba(44,44,44,0.08);
  --sombra-hover: 0 6px 24px rgba(44,44,44,0.14);
  --radio: 10px;
  --radio-sm: 6px;
  --fuente: 'Inter', system-ui, -apple-system, sans-serif;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--fuente);
  color: var(--carbon);
  background: var(--crema-claro);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--verde); text-decoration: none; }
a:hover { color: var(--verde-oscuro); }
ul { list-style: none; }

/* TIPOGRAFÍA */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--carbon); }
h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* CONTENEDOR */
.container { max-width: 1140px; margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 5rem 0; }
.section-alt { background: var(--crema); }
.section-verde { background: var(--verde); color: var(--blanco); }
.section-verde h2, .section-verde h3, .section-verde p { color: var(--blanco); }

/* ---- HEADER / NAV ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--blanco);
  border-bottom: 1px solid var(--borde);
  box-shadow: 0 1px 8px rgba(44,44,44,0.06);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--verde-oscuro);
  letter-spacing: -0.02em;
}
.logo span { color: var(--ambar); }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { font-size: 0.92rem; font-weight: 500; color: var(--gris-calido); transition: color .2s; }
.nav-links a:hover { color: var(--verde); }
.nav-cta {
  background: var(--ambar);
  color: var(--blanco) !important;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radio-sm);
  font-weight: 600;
  transition: background .2s !important;
}
.nav-cta:hover { background: var(--ambar-oscuro) !important; color: var(--blanco) !important; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.hamburger span { width: 24px; height: 2px; background: var(--carbon); border-radius: 2px; transition: all .3s; }
.mobile-menu { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--blanco); border-bottom: 1px solid var(--borde); padding: 1.5rem; z-index: 99; }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 0.75rem 0; font-weight: 500; color: var(--carbon); border-bottom: 1px solid var(--borde); }
.mobile-menu a:last-child { border-bottom: none; }

/* ---- HERO ---- */
.hero {
  background: linear-gradient(135deg, var(--verde-oscuro) 0%, var(--verde) 60%, #4A7A42 100%);
  color: var(--blanco);
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content { position: relative; z-index: 1; max-width: 700px; }
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--blanco);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 20px;
  margin-bottom: 1.5rem;
}
.hero h1 { color: var(--blanco); margin-bottom: 1.25rem; }
.hero p { font-size: 1.15rem; opacity: 0.9; margin-bottom: 2rem; max-width: 560px; }
.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ---- BOTONES ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radio-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all .2s;
  cursor: pointer;
  border: none;
  text-decoration: none;
}
.btn-primary { background: var(--ambar); color: var(--blanco); }
.btn-primary:hover { background: var(--ambar-oscuro); color: var(--blanco); transform: translateY(-1px); box-shadow: var(--sombra-hover); }
.btn-outline { background: transparent; color: var(--blanco); border: 2px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.12); color: var(--blanco); }
.btn-verde { background: var(--verde); color: var(--blanco); }
.btn-verde:hover { background: var(--verde-oscuro); color: var(--blanco); transform: translateY(-1px); }
.btn-lg { padding: 1rem 2.2rem; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* ---- TARJETAS DE SERVICIO ---- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
.service-card {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 2rem 1.75rem;
  transition: all .3s;
  text-decoration: none;
  display: block;
  color: var(--carbon);
}
.service-card:hover { box-shadow: var(--sombra-hover); transform: translateY(-3px); border-color: var(--verde); color: var(--carbon); }
.service-icon {
  width: 52px;
  height: 52px;
  background: var(--verde-claro);
  border-radius: var(--radio-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
}
.service-card h3 { margin-bottom: 0.6rem; font-size: 1.05rem; }
.service-card p { font-size: 0.9rem; color: var(--gris-calido); }
.service-card .link-arrow { display: inline-flex; align-items: center; gap: 0.3rem; margin-top: 1rem; font-size: 0.85rem; font-weight: 600; color: var(--verde); }

/* ---- CIFRAS / STATS ---- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 2rem; text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: 800; color: var(--ambar); line-height: 1; margin-bottom: 0.4rem; }
.stat-label { font-size: 0.9rem; opacity: 0.85; }

/* ---- PASOS / PROCESO ---- */
.steps { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 2.5rem; }
.step { display: flex; gap: 1.25rem; align-items: flex-start; }
.step-num {
  min-width: 40px;
  height: 40px;
  background: var(--verde);
  color: var(--blanco);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.step-content h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.step-content p { font-size: 0.9rem; color: var(--gris-calido); }

/* ---- FAQ ---- */
.faq-list { margin-top: 2.5rem; }
.faq-item { border-bottom: 1px solid var(--borde); }
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--carbon);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-question .icon { font-size: 1.25rem; transition: transform .3s; flex-shrink: 0; color: var(--verde); }
.faq-item.open .icon { transform: rotate(45deg); }
.faq-answer { display: none; padding: 0 0 1.25rem; color: var(--gris-calido); font-size: 0.95rem; line-height: 1.7; }
.faq-item.open .faq-answer { display: block; }

/* ---- FORMULARIO ---- */
.form-card {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 2.5rem;
  box-shadow: var(--sombra);
}
.form-title { margin-bottom: 0.4rem; font-size: 1.35rem; }
.form-subtitle { color: var(--gris-calido); margin-bottom: 2rem; font-size: 0.95rem; }
.form-group { margin-bottom: 1.25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
label { display: block; font-weight: 600; font-size: 0.875rem; margin-bottom: 0.4rem; color: var(--carbon); }
input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--borde);
  border-radius: var(--radio-sm);
  font-family: var(--fuente);
  font-size: 0.95rem;
  color: var(--carbon);
  background: var(--crema-claro);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--verde);
  box-shadow: 0 0 0 3px rgba(61,107,53,0.12);
  background: var(--blanco);
}
textarea { resize: vertical; min-height: 110px; }
.form-legal { font-size: 0.78rem; color: var(--gris-calido); margin-top: 0.75rem; }
.form-success { display: none; background: var(--verde-claro); border: 1px solid var(--verde); border-radius: var(--radio-sm); padding: 1.25rem; text-align: center; color: var(--verde-oscuro); font-weight: 600; }

/* ---- TRUST SIGNALS ---- */
.trust-bar {
  background: var(--blanco);
  border-top: 1px solid var(--borde);
  border-bottom: 1px solid var(--borde);
  padding: 1.5rem 0;
}
.trust-items { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 2rem; }
.trust-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; font-weight: 500; color: var(--gris-calido); }
.trust-item .icon { font-size: 1.1rem; }

/* ---- CHECKLIST ---- */
.checklist { margin-top: 1.25rem; }
.checklist li { display: flex; align-items: flex-start; gap: 0.6rem; margin-bottom: 0.7rem; font-size: 0.95rem; }
.checklist li::before { content: '✓'; color: var(--verde); font-weight: 700; flex-shrink: 0; margin-top: 0.05rem; }

/* ---- ALERTA / BANNER INFO ---- */
.info-banner {
  background: var(--verde-claro);
  border-left: 4px solid var(--verde);
  border-radius: 0 var(--radio-sm) var(--radio-sm) 0;
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.info-banner p { font-size: 0.93rem; color: var(--verde-oscuro); margin: 0; }
.info-banner strong { font-weight: 700; }

/* ---- GRID 2 COLUMNAS ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.grid-2-reverse { grid-template-columns: 1fr 1fr; }

/* ---- BREADCRUMB ---- */
.breadcrumb {
  background: var(--crema);
  border-bottom: 1px solid var(--borde);
  padding: 0.75rem 0;
}
.breadcrumb-list { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--gris-calido); }
.breadcrumb-list a { color: var(--gris-calido); }
.breadcrumb-list a:hover { color: var(--verde); }
.breadcrumb-list .sep { opacity: 0.5; }

/* ---- PAGE HERO (interior) ---- */
.page-hero {
  background: linear-gradient(135deg, var(--verde-oscuro) 0%, var(--verde) 100%);
  color: var(--blanco);
  padding: 4rem 0 3.5rem;
}
.page-hero h1 { color: var(--blanco); margin-bottom: 1rem; }
.page-hero p { opacity: 0.9; font-size: 1.1rem; max-width: 600px; }

/* ---- CALIFICACIONES ENERGÉTICAS ---- */
.rating-scale { display: flex; flex-direction: column; gap: 0.4rem; margin: 1.5rem 0; }
.rating-bar { display: flex; align-items: center; gap: 0.75rem; }
.rating-letter {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: white;
  flex-shrink: 0;
}
.rating-a { background: #00A550; }
.rating-b { background: #4DB848; }
.rating-c { background: #8DC63F; }
.rating-d { background: #F7EC13; color: #333; }
.rating-e { background: #F5A623; }
.rating-f { background: #ED7D31; }
.rating-g { background: #C00000; }
.rating-desc { font-size: 0.85rem; color: var(--gris-calido); }

/* ---- FOOTER ---- */
.footer {
  background: var(--carbon);
  color: rgba(255,255,255,0.7);
  padding: 3.5rem 0 2rem;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand .logo { color: var(--blanco); margin-bottom: 1rem; }
.footer-brand p { font-size: 0.875rem; line-height: 1.7; }
.footer h4 { color: var(--blanco); font-size: 0.9rem; margin-bottom: 1rem; }
.footer ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer ul a { font-size: 0.875rem; color: rgba(255,255,255,0.65); transition: color .2s; }
.footer ul a:hover { color: var(--blanco); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--blanco); }

/* ---- CALCULADORA DE AHORRO ---- */
.calc-wrapper {
  background: var(--blanco);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  overflow: hidden;
  box-shadow: var(--sombra);
}
.calc-header { background: var(--verde); color: var(--blanco); padding: 1.75rem 2rem; }
.calc-header h3 { color: var(--blanco); margin-bottom: 0.3rem; font-size: 1.25rem; }
.calc-header p { opacity: 0.9; font-size: 0.9rem; margin: 0; }
.calc-body { padding: 2rem; }
.calc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.calc-result {
  background: var(--crema);
  border: 2px solid var(--verde);
  border-radius: var(--radio-sm);
  padding: 1.5rem;
  text-align: center;
  margin-top: 1.25rem;
  display: none;
}
.calc-result.show { display: block; }
.calc-ahorro { font-size: 2.2rem; font-weight: 800; color: var(--verde); line-height: 1; }
.calc-ahorro-label { font-size: 0.875rem; color: var(--gris-calido); margin-top: 0.3rem; }
.calc-result-detail { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; margin-top: 1.25rem; text-align: center; }
.calc-result-detail .num { font-size: 1.3rem; font-weight: 700; color: var(--ambar); }
.calc-result-detail .lbl { font-size: 0.75rem; color: var(--gris-calido); }

/* ---- LEAD MAGNET ---- */
.lead-magnet {
  background: linear-gradient(135deg, var(--crema) 0%, #EDE8DF 100%);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.lead-magnet-icon { font-size: 4rem; flex-shrink: 0; }
.lead-magnet h3 { font-size: 1.35rem; margin-bottom: 0.4rem; }
.lead-magnet p { color: var(--gris-calido); font-size: 0.95rem; margin-bottom: 1.25rem; }
.lead-magnet-form { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.lead-magnet-form input { flex: 1; min-width: 200px; }
.lead-magnet-form button { white-space: nowrap; }

/* ---- FINANCIACIÓN BADGE ---- */
.financiacion-card {
  background: var(--blanco);
  border: 2px solid var(--ambar);
  border-radius: var(--radio);
  padding: 1.75rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.financiacion-card .icon { font-size: 2rem; flex-shrink: 0; }
.financiacion-card h4 { margin-bottom: 0.3rem; color: var(--ambar-oscuro); }
.financiacion-card p { font-size: 0.875rem; color: var(--gris-calido); margin: 0; }

/* ---- NOS OCUPAMOS DE TODO ---- */
.ocupamos-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2rem; }
.ocupamos-item { text-align: center; padding: 1.5rem 1rem; }
.ocupamos-num { font-size: 2.5rem; font-weight: 800; color: var(--verde-claro); line-height: 1; margin-bottom: 0.5rem; }
.ocupamos-item h4 { margin-bottom: 0.4rem; font-size: 1rem; }
.ocupamos-item p { font-size: 0.875rem; color: rgba(255,255,255,0.8); margin: 0; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .ocupamos-grid { grid-template-columns: 1fr; }
  .lead-magnet { flex-direction: column; gap: 1.5rem; }
  .calc-row { grid-template-columns: 1fr; }
  .calc-result-detail { grid-template-columns: 1fr; gap: 0.75rem; }
}

@media (max-width: 640px) {
  .section { padding: 3.5rem 0; }
  .hero { padding: 4rem 0 3.5rem; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; justify-content: center; }
  .trust-items { gap: 1rem; }
  .form-card { padding: 1.75rem 1.25rem; }
}