/* ============================================================
   KERA GH2 — v9 Final
   Identidad visual: Kera GH2 azul / oscuro / tecnológico
   Paleta: #0F1031 | #19226D | #67C2EE | #EDEDED | #0B0D12
   Tipografía: Barlow + DM Sans
   ============================================================ */

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

:root {
  /* Kera GH2 identidad propia */
  --quantum:      #0F1031;
  --power:        #19226D;
  --sky:          #67C2EE;
  --sky-dim:      #4AAAD4;
  --sky-glow:     rgba(103,194,238,0.18);
  --silver:       #EDEDED;
  --carbon:       #0B0D12;
  --dark-bg:      #0D1020;
  --mid-bg:       #111428;
  --card-bg:      #161B36;
  --card-hover:   #1C2240;

  /* Grises / texto */
  --white:        #FFFFFF;
  --text-muted:   rgba(237,237,237,0.58);
  --text-dim:     rgba(237,237,237,0.35);
  --border:       rgba(103,194,238,0.15);
  --border-dim:   rgba(255,255,255,0.08);
  --border-card:  rgba(103,194,238,0.12);

  /* WhatsApp se conserva verde */
  --whatsapp:     #25D366;

  /* Tipografía */
  --font-head:    'Barlow', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Layout */
  --max-w:        1220px;
  --radius:       6px;
  --radius-lg:    10px;
  --transition:   0.24s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--dark-bg);
  color: var(--silver);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--sky); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--white); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }

/* TYPOGRAPHY */
.section-label {
  font-family: var(--font-head);
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.26em; text-transform: uppercase;
  color: var(--sky); display: block; margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.65rem, 3vw, 2.4rem);
  font-weight: 800; color: var(--white);
  line-height: 1.15; margin-bottom: 18px;
}
.section-sub {
  font-size: 1rem; color: var(--text-muted);
  max-width: 640px; line-height: 1.78;
}
.divider {
  width: 36px; height: 2px;
  background: linear-gradient(90deg, var(--sky), transparent);
  margin-bottom: 28px; border-radius: 2px;
}

/* BUTTONS */
.btn-primary {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--sky); color: var(--quantum);
  font-family: var(--font-head); font-weight: 700;
  font-size: 0.87rem; letter-spacing: 0.07em; text-transform: uppercase;
  padding: 14px 28px; border-radius: var(--radius);
  border: none; cursor: pointer; transition: all var(--transition);
}
.btn-primary:hover {
  background: var(--white); color: var(--quantum);
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(103,194,238,0.28);
}
.btn-secondary {
  display: inline-flex; align-items: center; gap: 9px;
  background: transparent; color: var(--silver);
  font-family: var(--font-head); font-weight: 600;
  font-size: 0.87rem; letter-spacing: 0.07em; text-transform: uppercase;
  padding: 14px 28px; border-radius: var(--radius);
  border: 1px solid rgba(103,194,238,0.35);
  cursor: pointer; transition: all var(--transition); text-decoration: none;
}
.btn-secondary:hover {
  border-color: var(--sky); color: var(--sky);
  background: rgba(103,194,238,0.06);
}

/* ===== HEADER ===== */
#header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000; transition: background var(--transition), box-shadow var(--transition);
}
#header.scrolled {
  background: rgba(13,16,32,0.97);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
  display: flex; align-items: center;
  justify-content: space-between; height: 68px; gap: 32px;
}
.nav-logo img { height: 32px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a {
  font-family: var(--font-head); font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.07em; color: rgba(237,237,237,0.72);
  text-transform: uppercase; transition: color var(--transition);
}
.nav-links a:hover { color: var(--sky); }
.nav-cta {
  background: var(--sky) !important; color: var(--quantum) !important;
  padding: 9px 18px !important; border-radius: var(--radius) !important;
  font-weight: 700 !important;
}
.nav-cta:hover { background: var(--white) !important; color: var(--quantum) !important; }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--silver); transition: var(--transition);
}

/* ===== HERO ===== */
#hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden; padding-top: 68px;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('../images/instalacion-flota.webp');
  background-size: cover; background-position: center 35%;
  filter: brightness(0.15) saturate(0.5); z-index: 0;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(130deg,
    rgba(11,13,18,0.97) 0%,
    rgba(15,16,49,0.88) 50%,
    rgba(11,13,18,0.70) 100%);
  z-index: 1;
}
.hero-grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(103,194,238,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(103,194,238,0.04) 1px, transparent 1px);
  background-size: 60px 60px; z-index: 2;
}
/* Glow accent */
.hero-glow {
  position: absolute; top: -120px; right: 10%;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(103,194,238,0.07) 0%, transparent 65%);
  z-index: 2; pointer-events: none;
}
.hero-content {
  position: relative; z-index: 3;
  max-width: 820px; padding: 80px 0;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid rgba(103,194,238,0.35); background: rgba(103,194,238,0.09);
  padding: 6px 18px; border-radius: 40px; margin-bottom: 32px;
  font-size: 0.7rem; font-family: var(--font-head);
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--sky);
}
.hero-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--sky); animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:0.3;transform:scale(0.6)}
}
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(1.85rem, 4.2vw, 3.1rem);
  font-weight: 900; color: var(--white);
  line-height: 1.08; margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.hero-title .highlight { color: var(--sky); }
.hero-subtitle {
  font-size: clamp(0.93rem, 1.7vw, 1.07rem);
  color: rgba(237,237,237,0.68);
  max-width: 680px; margin-bottom: 14px; line-height: 1.78;
}
.hero-disclaimer-mini {
  font-size: 0.69rem; color: rgba(237,237,237,0.30);
  margin-bottom: 40px; font-style: italic;
  max-width: 560px; line-height: 1.6;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: flex; gap: 44px; flex-wrap: wrap;
  border-top: 1px solid rgba(103,194,238,0.16); padding-top: 30px;
}
.hero-stat-num {
  font-family: var(--font-head); font-size: 1.85rem;
  font-weight: 900; color: var(--sky); line-height: 1; display: block;
}
.hero-stat-label {
  font-size: 0.71rem; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.07em;
  margin-top: 4px; display: block;
}

/* ===== BENEFITS STRIP ===== */
#benefits {
  background: var(--mid-bg);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.benefits-grid { display: grid; grid-template-columns: repeat(4,1fr); }
.benefit-item {
  display: flex; align-items: center; gap: 14px;
  padding: 20px 26px; border-right: 1px solid var(--border);
}
.benefit-item:last-child { border-right: none; }
.benefit-icon {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--sky-glow); border: 1px solid rgba(103,194,238,0.25);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 0.95rem;
}
.benefit-text strong {
  display: block; font-family: var(--font-head);
  font-size: 0.84rem; color: var(--white); font-weight: 700;
}
.benefit-text span { font-size: 0.72rem; color: var(--text-dim); }

/* ===== SECTIONS ===== */
section { padding: 104px 0; }

/* ===== QUÉ ES ===== */
#que-es { background: var(--dark-bg); }
.que-es-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 72px; align-items: center;
}
.que-es-img { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.que-es-img img {
  width: 100%; aspect-ratio: 16/10; object-fit: cover;
  border-radius: var(--radius-lg);
}
.que-es-img::before {
  content: ''; position: absolute; inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card); z-index: 1; pointer-events: none;
}
/* Blue glow on image */
.que-es-img::after {
  content: ''; position: absolute;
  bottom: -20px; right: -20px;
  width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle, rgba(103,194,238,0.12) 0%, transparent 70%);
  pointer-events: none; z-index: 2;
}
.img-corner-tag {
  position: absolute; bottom: 16px; left: 16px; z-index: 3;
  background: rgba(13,16,32,0.90); border: 1px solid var(--border);
  padding: 7px 14px; border-radius: 4px;
  font-size: 0.68rem; font-family: var(--font-head);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--sky);
  backdrop-filter: blur(8px);
}
.feature-list {
  list-style: none; margin-top: 28px;
  display: flex; flex-direction: column; gap: 12px;
}
.feature-list li {
  display: flex; align-items: flex-start; gap: 12px;
  font-size: 0.92rem; color: rgba(237,237,237,0.76); line-height: 1.6;
}
.feature-list li::before {
  content: ''; width: 20px; height: 20px; border-radius: 50%;
  background: rgba(103,194,238,0.10); border: 1px solid var(--sky);
  flex-shrink: 0; margin-top: 1px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='8' viewBox='0 0 10 8'%3E%3Cpath d='M1 4l2.5 2.5L9 1' stroke='%2367C2EE' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}

/* ===== COMO FUNCIONA ===== */
#como-funciona { background: var(--mid-bg); }
.steps-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 20px; margin-top: 52px;
}
.step-card {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 30px 24px;
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}
.step-card:hover {
  border-color: rgba(103,194,238,0.40);
  background: var(--card-hover);
  transform: translateY(-4px);
}
.step-num {
  font-family: var(--font-head); font-size: 2rem; font-weight: 900;
  color: rgba(103,194,238,0.14); line-height: 1; margin-bottom: 14px; display: block;
}
.step-card h3 {
  font-family: var(--font-head); font-size: 0.95rem; font-weight: 700;
  color: var(--white); margin-bottom: 10px;
}
.step-card p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.68; }

/* ===== VIDEO ===== */
#funcionamiento-section {
  background: var(--carbon); padding: 72px 0;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.video-wrapper { max-width: 960px; margin: 0 auto; }
.video-header { text-align: center; margin-bottom: 36px; }
.video-container {
  position: relative; border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border); background: #000;
}
.video-container video { width: 100%; display: block; max-height: 540px; object-fit: cover; }

/* ===== SPECS ===== */
#especificaciones { background: var(--dark-bg); }
.specs-tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border-dim);
  margin-bottom: 40px; margin-top: 48px;
}
.spec-tab {
  font-family: var(--font-head); font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 13px 28px; background: none; border: none;
  color: var(--text-dim); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all var(--transition);
}
.spec-tab.active { color: var(--sky); border-bottom-color: var(--sky); }
.spec-tab:hover { color: var(--silver); }
.spec-panel { display: none; }
.spec-panel.active { display: block; }
.spec-intro {
  font-size: 0.87rem; color: var(--text-muted);
  margin-bottom: 28px; line-height: 1.7; max-width: 680px;
}
.specs-table-wrapper {
  overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border);
}
.specs-table { width: 100%; border-collapse: collapse; font-size: 0.83rem; }
.specs-table thead tr {
  background: var(--card-bg); border-bottom: 1px solid rgba(103,194,238,0.22);
}
.specs-table thead th {
  font-family: var(--font-head); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 13px 20px; text-align: left; color: var(--sky); white-space: nowrap;
}
.specs-table thead th:first-child { color: var(--text-dim); }
.specs-table thead th.col-highlight { color: var(--white); }
.specs-table tbody tr {
  border-bottom: 1px solid var(--border-dim); transition: background var(--transition);
}
.specs-table tbody tr:last-child { border-bottom: none; }
.specs-table tbody tr:hover { background: rgba(103,194,238,0.04); }
.specs-table tbody td {
  padding: 12px 20px; color: var(--text-muted);
  vertical-align: middle; line-height: 1.5;
}
.specs-table tbody td:first-child {
  color: var(--white); font-weight: 600;
  font-family: var(--font-head); font-size: 0.81rem;
}
.specs-table tbody td.sub-cat {
  color: var(--text-dim); font-weight: 400;
  font-family: var(--font-body); font-size: 0.79rem; padding-left: 32px;
}
.specs-table tbody td.val-highlight { color: var(--sky); font-weight: 600; }
.specs-note {
  margin-top: 16px; font-size: 0.73rem;
  color: var(--text-dim); font-style: italic; line-height: 1.65;
}

/* ===== AHORRO ===== */
#ahorro { background: var(--mid-bg); }
.ahorro-wrapper {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 72px; align-items: center;
}
.ahorro-visual {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 48px 40px;
  text-align: center; position: relative; overflow: hidden;
}
.ahorro-visual::before {
  content: ''; position: absolute; top: -60px; right: -60px;
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(103,194,238,0.10) 0%, transparent 70%);
  pointer-events: none;
}
.ahorro-pct {
  font-family: var(--font-head); font-size: clamp(3.5rem,7vw,5.5rem);
  font-weight: 900; color: var(--sky); line-height: 1; display: block;
}
.ahorro-pct-label {
  font-family: var(--font-head); font-size: 0.73rem;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text-dim); margin-top: 8px; display: block;
}
.ahorro-bars { margin: 32px 0; display: flex; flex-direction: column; gap: 14px; text-align: left; }
.bar-row label {
  font-size: 0.73rem; color: var(--text-dim); display: block;
  margin-bottom: 5px; text-transform: uppercase; letter-spacing: 0.07em;
}
.bar-track { height: 4px; background: rgba(255,255,255,0.08); border-radius: 2px; overflow: hidden; }
.bar-fill {
  height: 100%; border-radius: 2px;
  background: linear-gradient(90deg, var(--power), var(--sky));
  transition: width 1.5s ease;
}
.disclaimer-box {
  background: rgba(103,194,238,0.06); border: 1px solid rgba(103,194,238,0.18);
  border-radius: var(--radius); padding: 15px 18px; margin-top: 24px;
  font-size: 0.74rem; color: rgba(237,237,237,0.42); line-height: 1.65; text-align: left;
}
.disclaimer-box strong { color: rgba(103,194,238,0.65); }

/* ===== CREDIBILITY BLOCK ===== */
.credibility-block {
  background: rgba(103,194,238,0.06); border: 1px solid rgba(103,194,238,0.18);
  border-left: 3px solid var(--sky); border-radius: var(--radius);
  padding: 22px 22px; margin-top: 24px;
}
.credibility-block h4 {
  font-family: var(--font-head); font-size: 0.87rem; font-weight: 700;
  color: var(--sky); margin-bottom: 8px;
}
.credibility-block p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.72; }

/* ===== VALIDACIÓN ===== */
#validacion-tecnica { background: var(--dark-bg); }
.validacion-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start; margin-top: 52px;
}
.val-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.val-card {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 22px 20px;
}
.val-card .vc-icon { font-size: 1.2rem; margin-bottom: 10px; }
.val-card h4 {
  font-family: var(--font-head); font-size: 0.86rem; font-weight: 700;
  color: var(--white); margin-bottom: 6px;
}
.val-card p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.62; }

/* ===== TELEMETRÍA ===== */
#telemetria { background: var(--mid-bg); }
.telemetria-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
}
.telemetria-list {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 24px;
}
.telemetria-item {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 0.8rem; color: var(--text-muted); line-height: 1.55;
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius); padding: 10px 12px;
}
.telemetria-item::before {
  content: '→'; color: var(--sky); font-weight: 700;
  flex-shrink: 0; font-size: 0.75rem; margin-top: 1px;
}

/* ===== INSTALACIÓN ===== */
#instalacion { background: var(--dark-bg); }
.instalacion-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.install-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.install-card {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 22px 18px; text-align: center;
}
.install-card .ic-num {
  font-family: var(--font-head); font-size: 1.5rem; font-weight: 900;
  color: var(--sky); display: block; line-height: 1;
}
.install-card .ic-label {
  font-size: 0.7rem; color: var(--text-dim); margin-top: 5px;
  text-transform: uppercase; letter-spacing: 0.07em;
}

/* ===== FIT-GRID ===== */
.fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 768px) { .fit-grid { grid-template-columns: 1fr; } }

/* ===== PROCESO ===== */
#proceso { background: var(--mid-bg); }
.proceso-steps { display: flex; flex-direction: column; max-width: 800px; margin: 48px auto 0; }
.proceso-step {
  display: flex; align-items: flex-start; gap: 24px;
  padding: 24px 0; border-bottom: 1px solid var(--border-dim);
}
.proceso-step:last-child { border-bottom: none; }
.ps-num {
  font-family: var(--font-head); font-size: 0.67rem; font-weight: 700;
  letter-spacing: 0.1em; color: var(--sky);
  background: rgba(103,194,238,0.1); border: 1px solid rgba(103,194,238,0.22);
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px;
}
.ps-content h3 {
  font-family: var(--font-head); font-size: 0.95rem; font-weight: 700;
  color: var(--white); margin-bottom: 4px;
}
.ps-content p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.65; }

/* ===== APLICACIONES ===== */
#aplicaciones { background: var(--dark-bg); }
.aplicaciones-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 18px; margin-top: 48px;
}
.app-card {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 26px 22px;
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}
.app-card:hover {
  border-color: rgba(103,194,238,0.38);
  background: var(--card-hover); transform: translateY(-3px);
}
.app-icon { font-size: 1.6rem; margin-bottom: 12px; }
.app-card h3 {
  font-family: var(--font-head); font-size: 0.91rem; font-weight: 700;
  color: var(--white); margin-bottom: 8px;
}
.app-card p { font-size: 0.79rem; color: var(--text-muted); line-height: 1.65; }

/* ===== MEDICIÓN ===== */
#medicion { background: var(--mid-bg); }
.medicion-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.metric-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.metric-card {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 22px 18px; text-align: center;
}
.metric-card .mc-icon { font-size: 1.2rem; margin-bottom: 9px; }
.metric-card h4 {
  font-family: var(--font-head); font-size: 0.83rem; font-weight: 700;
  color: var(--white); margin-bottom: 4px;
}
.metric-card p { font-size: 0.75rem; color: var(--text-muted); line-height: 1.6; }

/* ===== FAQ ===== */
#faq { background: var(--dark-bg); }
.faq-grid { max-width: 800px; margin: 52px auto 0; }
.faq-item { border-bottom: 1px solid var(--border-dim); }
.faq-question {
  width: 100%; background: none; border: none; text-align: left;
  padding: 20px 0; display: flex; justify-content: space-between;
  align-items: center; gap: 16px; cursor: pointer; color: var(--white);
  font-family: var(--font-head); font-size: 0.91rem; font-weight: 600;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--sky); }
.faq-arrow {
  width: 20px; height: 20px; border-radius: 50%;
  border: 1px solid var(--border-dim); display: flex;
  align-items: center; justify-content: center; flex-shrink: 0;
  font-size: 0.67rem; color: var(--sky);
  transition: transform var(--transition), background var(--transition);
}
.faq-item.open .faq-arrow { transform: rotate(180deg); background: rgba(103,194,238,0.12); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-item.open .faq-answer { max-height: 360px; }
.faq-answer p { font-size: 0.86rem; color: var(--text-muted); line-height: 1.72; padding-bottom: 22px; }

/* ===== CONTACTO ===== */
#contacto { background: var(--mid-bg); }
.contacto-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 72px; align-items: start; }
.contact-info { padding-top: 16px; }
.contact-info > p { font-size: 0.93rem; color: var(--text-muted); margin-bottom: 30px; line-height: 1.75; }
.contact-links { display: flex; flex-direction: column; gap: 13px; margin-bottom: 26px; }
.contact-link {
  display: flex; align-items: center; gap: 12px;
  color: var(--silver); font-size: 0.88rem; transition: color var(--transition);
}
.contact-link:hover { color: var(--sky); }
.contact-link-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--sky-glow); border: 1px solid rgba(103,194,238,0.25);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; flex-shrink: 0;
}
.wa-btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--whatsapp); color: #fff;
  font-family: var(--font-head); font-weight: 700; font-size: 0.82rem;
  padding: 11px 20px; border-radius: var(--radius);
  letter-spacing: 0.04em; text-transform: uppercase; transition: all var(--transition);
}
.wa-btn:hover { background: #1db954; color: #fff; transform: translateY(-1px); }
.ecosistema-note {
  margin-top: 28px; padding-top: 20px;
  border-top: 1px solid var(--border-dim);
  font-size: 0.75rem; color: rgba(237,237,237,0.28); line-height: 1.65;
}
.ecosistema-note a { color: rgba(103,194,238,0.55); }
.ecosistema-note a:hover { color: var(--sky); }

/* FORM */
.contact-form {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 38px 34px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 0.7rem; font-family: var(--font-head);
  font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 7px;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; background: rgba(13,16,32,0.85);
  border: 1px solid rgba(103,194,238,0.12);
  border-radius: var(--radius); padding: 11px 14px;
  color: var(--white); font-size: 0.87rem; font-family: var(--font-body);
  transition: border-color var(--transition); outline: none; -webkit-appearance: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--sky); box-shadow: 0 0 0 2px rgba(103,194,238,0.10);
}
.form-group select option { background: var(--quantum); }
.form-group textarea { resize: vertical; min-height: 86px; }
.form-section-divider {
  border-top: 1px solid var(--border-dim); margin: 4px 0 18px; padding-top: 18px;
}
.form-section-label {
  font-family: var(--font-head); font-size: 0.68rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--sky); margin-bottom: 16px; display: block;
}
.form-section-label span { color: var(--text-dim); font-weight: 400; }
.form-interes { margin-bottom: 18px; }
.form-interes label.main-label {
  display: block; font-size: 0.7rem; font-family: var(--font-head);
  font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 12px;
}
.checkbox-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.checkbox-item {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 0.79rem; color: rgba(237,237,237,0.62);
}
.checkbox-item input[type="checkbox"] {
  width: 14px; height: 14px;
  accent-color: var(--sky); flex-shrink: 0;
}
.btn-submit {
  width: 100%; background: var(--sky); color: var(--quantum);
  font-family: var(--font-head); font-weight: 700; font-size: 0.88rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  padding: 14px 24px; border: none; border-radius: var(--radius);
  cursor: pointer; transition: all var(--transition); margin-top: 6px;
}
.btn-submit:hover {
  background: var(--white); transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(103,194,238,0.25);
}
.form-status {
  display: none; margin-top: 14px; padding: 13px 16px;
  border-radius: var(--radius); font-size: 0.83rem;
  line-height: 1.65; border: 1px solid transparent;
}
.form-status a { color: inherit; text-decoration: underline; }
.form-status--success {
  background: rgba(103,194,238,0.08);
  border-color: rgba(103,194,238,0.30);
  color: rgba(103,194,238,0.90);
}
.form-status--error {
  background: rgba(224,92,92,0.08);
  border-color: rgba(224,92,92,0.30);
  color: #f0a0a0;
}
.form-fallback {
  margin-top: 12px; font-size: 0.71rem;
  color: rgba(237,237,237,0.28); text-align: center; line-height: 1.65;
}
.form-fallback a { color: rgba(103,194,238,0.55); }
.form-fallback a:hover { color: var(--sky); }

/* ===== FOOTER ===== */
#footer {
  background: var(--quantum);
  border-top: 1px solid var(--border);
  padding: 52px 0 28px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px; padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
}
.footer-brand img { height: auto; width: 200px; max-width: 100%; margin-bottom: 18px; }
.footer-brand p { font-size: 0.79rem; color: var(--text-dim); line-height: 1.65; max-width: 300px; }
.footer-col h4 {
  font-family: var(--font-head); font-size: 0.68rem;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--sky); margin-bottom: 14px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.footer-col ul li a {
  font-size: 0.8rem; color: var(--text-dim); transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--white); }
.footer-disclaimer {
  padding: 18px 0 0;
  font-size: 0.7rem; color: rgba(237,237,237,0.22); line-height: 1.65;
  border-top: 1px solid var(--border-dim); margin-top: 0;
}
.footer-bottom {
  display: flex; justify-content: space-between;
  align-items: center; padding-top: 22px; gap: 16px; flex-wrap: wrap;
}
.footer-bottom p { font-size: 0.72rem; color: rgba(237,237,237,0.22); }
.footer-bottom a { font-size: 0.72rem; color: rgba(237,237,237,0.22); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--silver); }

/* ===== SEGURIDAD ===== */
#seguridad { background: var(--mid-bg); }
#mantenimiento { background: var(--dark-bg); }
.mantenimiento-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 48px; }
.mant-card {
  background: var(--card-bg); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 26px 22px;
  transition: border-color var(--transition);
}
.mant-card:hover { border-color: rgba(103,194,238,0.32); }
.mant-icon { font-size: 1.5rem; margin-bottom: 12px; }
.mant-card h3 {
  font-family: var(--font-head); font-size: 0.9rem; font-weight: 700;
  color: var(--white); margin-bottom: 8px;
}
.mant-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.65; }
.mant-card .mant-stat {
  font-family: var(--font-head); font-size: 1.25rem; font-weight: 900;
  color: var(--sky); display: block; margin-top: 10px;
}

/* ===== PRIVACY PAGE ===== */
.privacy-hero { padding:130px 0 56px; background:var(--mid-bg); border-bottom:1px solid var(--border-dim); }
.privacy-body { padding:72px 0 96px; background:var(--dark-bg); }
.prose { max-width:780px; }
.prose h2 { font-family:var(--font-head); font-size:1.05rem; font-weight:700; color:var(--sky); margin:40px 0 10px; padding-top:8px; border-top:1px solid var(--border-dim); }
.prose h2:first-of-type { border-top:none; margin-top:28px; }
.prose p { font-size:0.91rem; color:rgba(237,237,237,0.68); line-height:1.78; margin-bottom:14px; }
.prose ul { padding-left:20px; margin-bottom:14px; }
.prose li { font-size:0.91rem; color:rgba(237,237,237,0.68); line-height:1.75; margin-bottom:6px; }
.prose strong { color:rgba(103,194,238,0.85); font-weight:600; }
.prose a { color:var(--sky); }
.prose a:hover { color:var(--white); }
.prose .highlight-box { background:rgba(103,194,238,0.07); border:1px solid rgba(103,194,238,0.18); border-left:3px solid var(--sky); border-radius:var(--radius); padding:18px 20px; margin:20px 0; font-size:0.88rem; color:rgba(237,237,237,0.65); line-height:1.7; }
.back-link { display:inline-flex; align-items:center; gap:8px; font-family:var(--font-head); font-size:0.78rem; letter-spacing:0.06em; text-transform:uppercase; color:var(--sky); margin-bottom:36px; transition:color 0.25s; }
.back-link:hover { color:var(--white); }
.update-badge { display:inline-block; font-size:0.7rem; font-family:var(--font-head); letter-spacing:0.1em; text-transform:uppercase; color:var(--text-dim); border:1px solid var(--border-dim); padding:5px 12px; border-radius:20px; margin-bottom:20px; }

/* ===== ANIMATIONS ===== */
.fade-up { opacity:0; transform:translateY(24px); transition:opacity 0.6s ease,transform 0.6s ease; }
.fade-up.visible { opacity:1; transform:translateY(0); }
.fade-up:nth-child(2){transition-delay:0.10s}
.fade-up:nth-child(3){transition-delay:0.18s}
.fade-up:nth-child(4){transition-delay:0.26s}
.fade-up:nth-child(5){transition-delay:0.34s}
.fade-up:nth-child(6){transition-delay:0.42s}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
  .benefits-grid { grid-template-columns: repeat(2,1fr); }
  .benefit-item:nth-child(2) { border-right: none; }
  .benefit-item:nth-child(3) { border-right: 1px solid var(--border); }
  .que-es-grid,.ahorro-wrapper,.instalacion-grid,.medicion-grid,.contacto-grid,.validacion-grid,.telemetria-grid { grid-template-columns:1fr; gap:40px; }
  .steps-grid,.aplicaciones-grid { grid-template-columns:1fr 1fr; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .val-cards { grid-template-columns:1fr 1fr; }
}
@media (max-width: 768px) {
  section { padding:72px 0; }
  .nav-links { display:none; flex-direction:column; position:fixed; top:68px; left:0; right:0; background:rgba(13,16,32,0.98); padding:22px; gap:18px; border-bottom:1px solid var(--border); }
  .nav-links.open { display:flex; }
  .nav-toggle { display:flex; }
  .steps-grid,.aplicaciones-grid,.metric-cards,.install-cards,.val-cards,.mantenimiento-grid,.telemetria-list { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
  .checkbox-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .benefits-grid { grid-template-columns:1fr 1fr; }
  .benefit-item:nth-child(3) { border-right: none; }
}
@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; }
  .hero-stats { gap: 22px; }
  .benefits-grid { grid-template-columns: 1fr; }
  .benefit-item { border-right:none; border-bottom:1px solid var(--border); }
  .benefit-item:last-child { border-bottom: none; }
  .contact-form { padding: 26px 18px; }
  .ahorro-visual { padding: 36px 24px; }
}

/* Footer logo responsive */
@media (max-width: 480px) {
  .footer-brand img { width: 170px; }
}