/* ==========================================================================
   Gases del Valle — Hoja de estilos
   Paleta industrial: azul profundo + cian gas + acentos
   ========================================================================== */

:root {
  --navy-900: #071528;
  --navy-800: #0b1e3b;
  --navy-700: #0f2a52;
  --navy-600: #163a6b;
  --cyan-500: #2bd6ff;
  --cyan-400: #5fe1ff;
  --cyan-300: #9fe8ff;
  --blue-500: #1b7bd6;
  --ink: #0a1626;
  --paper: #f5f9ff;
  --paper-2: #eaf2fd;
  --white: #ffffff;
  --text: #1a2b45;
  --text-soft: #52678a;
  --line: rgba(23, 58, 107, 0.12);
  --shadow-sm: 0 6px 20px rgba(11, 30, 59, 0.08);
  --shadow-md: 0 18px 45px rgba(11, 30, 59, 0.14);
  --shadow-lg: 0 30px 70px rgba(11, 30, 59, 0.22);
  --radius: 18px;
  --radius-sm: 12px;
  --grad-cyan: linear-gradient(120deg, #2bd6ff 0%, #1b7bd6 100%);
  --grad-dark: linear-gradient(160deg, #0b1e3b 0%, #071528 100%);
  --container: 1160px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 86px; }

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--paper);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, .brand-text { font-family: "Sora", "Inter", sans-serif; line-height: 1.12; letter-spacing: -0.02em; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 22px; }

/* Progreso de scroll -------------------------------------------------------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--grad-cyan); z-index: 200; transition: width 0.1s linear;
  box-shadow: 0 0 12px rgba(43, 214, 255, 0.7);
}

/* Navbar -------------------------------------------------------------------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0; transition: all 0.4s var(--ease);
}
.navbar.scrolled {
  background: rgba(7, 21, 40, 0.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  padding: 10px 0; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }

.brand { display: flex; align-items: center; gap: 10px; color: var(--white); }
.brand-mark { display: grid; place-items: center; filter: drop-shadow(0 4px 10px rgba(43,214,255,.4)); }
.brand-text { font-weight: 800; font-size: 1.22rem; color: var(--white); }
.brand-text span { color: var(--cyan-400); font-weight: 600; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  color: rgba(255, 255, 255, 0.82); font-size: 0.94rem; font-weight: 500;
  padding: 9px 14px; border-radius: 10px; transition: all 0.25s var(--ease); position: relative;
}
.nav-links a:not(.btn-nav):hover { color: var(--white); background: rgba(255, 255, 255, 0.08); }
.btn-nav {
  background: var(--grad-cyan); color: var(--navy-900) !important; font-weight: 700 !important;
  margin-left: 8px; box-shadow: 0 8px 22px rgba(43, 214, 255, 0.35);
}
.btn-nav:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(43, 214, 255, 0.5); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 26px; height: 2.5px; background: var(--white); border-radius: 3px; transition: all 0.3s var(--ease); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* Botones ------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px; justify-content: center;
  padding: 14px 26px; border-radius: 999px; font-weight: 600; font-size: 0.98rem;
  cursor: pointer; border: 0; transition: all 0.3s var(--ease); font-family: inherit;
}
.btn-primary { background: var(--grad-cyan); color: var(--navy-900); box-shadow: 0 12px 30px rgba(43, 214, 255, 0.35); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 18px 40px rgba(43, 214, 255, 0.5); }
.btn-primary span { transition: transform 0.3s var(--ease); }
.btn-primary:hover span { transform: translateX(4px); }
.btn-ghost { background: rgba(255, 255, 255, 0.06); color: var(--white); border: 1px solid rgba(255, 255, 255, 0.25); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-3px); }
.btn-block { width: 100%; }

/* Hero ---------------------------------------------------------------------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: var(--grad-dark); color: var(--white); overflow: hidden; padding: 120px 0 60px;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }
.hero-glow {
  position: absolute; z-index: 1; width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 214, 255, 0.28), transparent 65%);
  top: -120px; right: -80px; filter: blur(30px); pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr 0.85fr;
  gap: 50px; align-items: center;
}
.hero-content { max-width: 640px; }

.pill {
  display: inline-flex; align-items: center; gap: 9px; padding: 8px 16px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.07); border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.86rem; font-weight: 500; color: var(--cyan-300); margin-bottom: 22px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 0 rgba(95, 225, 255, 0.6); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(95, 225, 255, 0.6); } 70% { box-shadow: 0 0 0 10px rgba(95, 225, 255, 0); } 100% { box-shadow: 0 0 0 0 rgba(95, 225, 255, 0); } }

.hero h1 { font-size: clamp(2.4rem, 5.4vw, 4rem); font-weight: 800; margin-bottom: 20px; }
.grad-text { background: linear-gradient(120deg, #5fe1ff, #9fe8ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: clamp(1rem, 1.5vw, 1.15rem); color: rgba(255, 255, 255, 0.8); margin-bottom: 32px; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 46px; }

.hero-stats { display: flex; gap: 38px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat-num, .stat-plus { font-family: "Sora", sans-serif; font-size: 2.2rem; font-weight: 800; color: var(--white); line-height: 1; display: inline; }
.stat-plus { color: var(--cyan-400); }
.stat-label { font-size: 0.84rem; color: rgba(255, 255, 255, 0.65); margin-top: 8px; }

/* Escena de cilindros ------------------------------------------------------- */
.hero-visual { display: grid; place-items: center; }
.cylinder-scene { position: relative; width: 320px; height: 380px; }
.cyl {
  position: absolute; bottom: 30px; width: 78px; height: 210px; border-radius: 40px 40px 16px 16px;
  display: flex; align-items: flex-end; justify-content: center; padding-bottom: 24px;
  font-family: "Sora", sans-serif; font-weight: 700; color: rgba(255,255,255,.92); font-size: 1.1rem;
  box-shadow: inset -8px 0 22px rgba(0,0,0,.35), 0 20px 40px rgba(0,0,0,.4); animation: float 6s ease-in-out infinite;
}
.cyl-cap { position: absolute; top: -16px; width: 26px; height: 20px; border-radius: 6px 6px 3px 3px; background: #c7d6ea; }
.cyl-1 { left: 40px; background: linear-gradient(150deg, #38a3ff, #1656b0); z-index: 3; }
.cyl-2 { left: 122px; background: linear-gradient(150deg, #2bd6ff, #1b7bd6); height: 240px; z-index: 2; animation-delay: .8s; }
.cyl-3 { left: 204px; background: linear-gradient(150deg, #7b8cff, #4b3fb0); z-index: 1; animation-delay: 1.6s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }

.gauge { position: absolute; top: -6px; right: -6px; width: 120px; height: 120px; z-index: 5; }
.gauge svg { transform: rotate(-90deg); filter: drop-shadow(0 8px 20px rgba(0,0,0,.4)); }
.gauge-track { fill: rgba(7,21,40,.75); stroke: rgba(255,255,255,.12); stroke-width: 8; }
.gauge-fill { fill: none; stroke: url(#g); stroke: var(--cyan-400); stroke-width: 8; stroke-linecap: round;
  stroke-dasharray: 314; stroke-dashoffset: 78; transition: stroke-dashoffset .6s var(--ease); }
.gauge-center { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; }
.gauge-center strong { font-family: "Sora", sans-serif; font-size: 1.7rem; color: var(--white); }
.gauge-center small { display: block; font-size: .7rem; color: var(--cyan-300); letter-spacing: .15em; text-transform: uppercase; }

.scroll-cue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 3; width: 26px; height: 44px; border: 2px solid rgba(255,255,255,.4); border-radius: 14px; display: grid; justify-items: center; padding-top: 8px; }
.scroll-cue span { width: 4px; height: 8px; border-radius: 3px; background: var(--cyan-400); animation: cue 1.6s infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 80% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }

/* Marquee ------------------------------------------------------------------- */
.marquee { background: var(--navy-900); overflow: hidden; padding: 18px 0; border-block: 1px solid rgba(255,255,255,.06); }
.marquee-track { display: flex; gap: 26px; white-space: nowrap; width: max-content; animation: scroll-x 28s linear infinite; }
.marquee-track span { font-family: "Sora", sans-serif; font-weight: 600; font-size: 1.05rem; color: rgba(255,255,255,.5); }
.marquee-track span:nth-child(odd) { color: var(--cyan-400); }
@keyframes scroll-x { to { transform: translateX(-50%); } }

/* Secciones ----------------------------------------------------------------- */
.section { padding: 96px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%); }
.eyebrow { display: inline-block; font-size: 0.82rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--blue-500); margin-bottom: 14px; }
.eyebrow.light { color: var(--cyan-400); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); font-weight: 700; margin-bottom: 16px; }
.lead { font-size: 1.08rem; color: var(--text-soft); margin-bottom: 24px; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 54px; }
.section-sub { color: var(--text-soft); font-size: 1.05rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }

.check-list { list-style: none; margin-bottom: 30px; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 34px; color: var(--text-soft); }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 1px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--grad-cyan); color: var(--navy-900); font-weight: 800; font-size: .78rem; display: grid; place-items: center;
}

/* Feature cards ------------------------------------------------------------- */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.feature-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; box-shadow: var(--shadow-sm); transition: all 0.35s var(--ease); }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(43, 214, 255, 0.4); }
.feature-ic { font-size: 1.8rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.92rem; color: var(--text-soft); }

/* Gases (grid interactivo) -------------------------------------------------- */
.gas-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.gas-card {
  position: relative; border-radius: var(--radius); padding: 26px 22px; min-height: 210px; overflow: hidden;
  color: var(--white); cursor: default; transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
}
.gas-card::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 80% 15%, rgba(255,255,255,.28), transparent 55%); pointer-events: none; }
.gas-card:hover { transform: translateY(-8px) scale(1.015); box-shadow: var(--shadow-lg); }
.gas-symbol { font-family: "Sora", sans-serif; font-size: 2.6rem; font-weight: 800; line-height: 1; }
.gas-formula { font-size: 0.9rem; opacity: 0.85; margin-top: 4px; }
.gas-name { font-family: "Sora", sans-serif; font-weight: 700; font-size: 1.15rem; margin-top: 16px; }
.gas-uses { margin-top: auto; padding-top: 14px; }
.gas-uses p { font-size: 0.86rem; opacity: 0; max-height: 0; transform: translateY(8px); transition: all 0.4s var(--ease); overflow: hidden; }
.gas-card:hover .gas-uses p { opacity: 0.95; max-height: 120px; transform: translateY(0); }
.gas-tag { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.8; transition: opacity 0.3s; }
.gas-card:hover .gas-tag { opacity: 0; }

/* Servicios ----------------------------------------------------------------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.service-card { position: relative; background: linear-gradient(180deg, #ffffff 0%, #eaf2fd 100%); border: 1px solid rgba(23, 58, 107, 0.10); border-radius: var(--radius); padding: 34px 28px; box-shadow: 0 14px 36px rgba(11, 30, 59, 0.10); transition: all 0.35s var(--ease); overflow: hidden; }
.service-card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--grad-cyan); transform: scaleX(0); transform-origin: left; transition: transform 0.4s var(--ease); }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 22px 48px rgba(11, 30, 59, 0.16); border-color: rgba(43, 214, 255, 0.5); }
.service-card:hover::before { transform: scaleX(1); }
.service-num { display: inline-grid; place-items: center; width: 58px; height: 58px; border-radius: 16px; font-family: "Sora", sans-serif; font-size: 1.65rem; font-weight: 800; line-height: 1; color: #1567b8; background: linear-gradient(135deg, rgba(43, 214, 255, 0.22), rgba(27, 123, 214, 0.16)); box-shadow: inset 0 0 0 1px rgba(27, 123, 214, 0.18); margin-bottom: 18px; transition: all 0.35s var(--ease); }
.service-card:hover .service-num { background: var(--grad-cyan); color: var(--navy-900); box-shadow: 0 12px 24px rgba(43, 214, 255, 0.45); transform: translateY(-2px); }
.service-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.service-card p { color: var(--text-soft); font-size: 0.95rem; }

/* Industrias ---------------------------------------------------------------- */
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.industry { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; text-align: center; box-shadow: var(--shadow-sm); transition: all 0.35s var(--ease); }
.industry:hover { transform: translateY(-6px) scale(1.02); box-shadow: var(--shadow-md); border-color: rgba(43,214,255,.4); }
.industry-ic { font-size: 2.4rem; display: block; margin-bottom: 14px; }
.industry h4 { font-size: 1.08rem; margin-bottom: 6px; }
.industry p { font-size: 0.88rem; color: var(--text-soft); }

/* Timeline ------------------------------------------------------------------ */
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.timeline::before { content: ""; position: absolute; top: 26px; left: 12%; right: 12%; height: 2px; background: linear-gradient(90deg, transparent, var(--cyan-400), transparent); }
.tl-step { text-align: center; position: relative; }
.tl-dot { width: 54px; height: 54px; border-radius: 50%; background: var(--grad-cyan); color: var(--navy-900); font-family: "Sora", sans-serif; font-weight: 800; font-size: 1.3rem; display: grid; place-items: center; margin: 0 auto 18px; box-shadow: 0 10px 24px rgba(43, 214, 255, 0.4); position: relative; z-index: 2; }
.tl-step h3 { font-size: 1.12rem; margin-bottom: 8px; }
.tl-step p { font-size: 0.9rem; color: var(--text-soft); }

/* Zona de entregas ---------------------------------------------------------- */
.zona-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 28px; align-items: stretch; }
.zona-map { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); border: 1px solid var(--line); min-height: 380px; }
.zona-map iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; filter: saturate(1.05); }
.zona-info { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; }
.zona-info h3 { font-size: 1.2rem; margin-bottom: 18px; }
.zona-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.zona-list li { position: relative; padding: 10px 14px 10px 38px; background: var(--paper); border: 1px solid var(--line); border-radius: 999px; font-size: 0.92rem; font-weight: 500; color: var(--text); }
.zona-list li::before { content: "📍"; position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font-size: 0.9rem; }
.zona-note { font-size: 0.92rem; color: var(--text-soft); margin-bottom: 20px; }
.zona-info .btn { margin-top: auto; align-self: flex-start; }

/* CTA / Contacto ------------------------------------------------------------ */
.section-cta { background: var(--grad-dark); color: var(--white); overflow: hidden; position: relative; }
.section-cta::before { content: ""; position: absolute; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(43,214,255,.2), transparent 65%); top: -150px; left: -100px; filter: blur(30px); }
.cta-inner { position: relative; z-index: 2; align-items: start; }
.section-cta .lead { color: rgba(255, 255, 255, 0.78); }
.contact-list { list-style: none; display: grid; gap: 14px; margin-top: 22px; }
.contact-list li { display: flex; align-items: center; gap: 12px; color: rgba(255, 255, 255, 0.85); }
.contact-list a:hover { color: var(--cyan-400); }

.contact-form { background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.14); border-radius: var(--radius); padding: 30px; backdrop-filter: blur(8px); }
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field label { display: block; font-size: 0.86rem; font-weight: 500; margin-bottom: 7px; color: rgba(255, 255, 255, 0.85); }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border-radius: var(--radius-sm); border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(7, 21, 40, 0.5); color: var(--white); font-family: inherit; font-size: 0.95rem; transition: all 0.25s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: rgba(255, 255, 255, 0.4); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--cyan-400); box-shadow: 0 0 0 3px rgba(43, 214, 255, 0.18); background: rgba(7, 21, 40, 0.75); }
.field select option { background: var(--navy-800); color: var(--white); }
.field textarea { resize: vertical; }
.error { display: block; color: #ff8a8a; font-size: 0.8rem; margin-top: 6px; min-height: 1em; }
.field.invalid input { border-color: #ff6b6b; }
.form-note { text-align: center; margin-top: 14px; font-size: 0.9rem; min-height: 1.2em; }
.form-note.ok { color: var(--cyan-300); }

/* Footer -------------------------------------------------------------------- */
.footer { background: var(--navy-900); color: rgba(255, 255, 255, 0.7); padding: 60px 0 26px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 32px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.footer-brand .brand-text { font-size: 1.4rem; }
.footer-brand p { margin-top: 14px; font-size: 0.92rem; max-width: 300px; }
.footer-col h5 { color: var(--white); font-family: "Sora", sans-serif; font-size: 0.95rem; margin-bottom: 14px; }
.footer-col a, .footer-col span { display: block; font-size: 0.9rem; padding: 5px 0; transition: color 0.25s; }
.footer-col a:hover { color: var(--cyan-400); }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 22px; font-size: 0.84rem; flex-wrap: wrap; gap: 10px; }

/* WhatsApp flotante --------------------------------------------------------- */
.wa-float { position: fixed; right: 26px; bottom: 26px; z-index: 96; width: 58px; height: 58px; border-radius: 50%; background: #25d366; color: #fff; display: grid; place-items: center; box-shadow: 0 12px 30px rgba(37, 211, 102, 0.45); transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease); }
.wa-float::before { content: ""; position: absolute; inset: 0; border-radius: 50%; background: #25d366; z-index: -1; animation: waPulse 2.4s ease-out infinite; }
@keyframes waPulse { 0% { transform: scale(1); opacity: 0.55; } 70% { transform: scale(1.7); opacity: 0; } 100% { opacity: 0; } }
.wa-float:hover { transform: translateY(-4px) scale(1.06); box-shadow: 0 18px 42px rgba(37, 211, 102, 0.6); }
.wa-float-label { position: absolute; right: 72px; background: var(--navy-800); color: #fff; padding: 8px 14px; border-radius: 10px; font-size: 0.85rem; font-weight: 500; white-space: nowrap; opacity: 0; transform: translateX(10px); pointer-events: none; transition: all 0.3s var(--ease); box-shadow: var(--shadow-sm); }
.wa-float-label::after { content: ""; position: absolute; right: -5px; top: 50%; width: 10px; height: 10px; background: var(--navy-800); transform: translateY(-50%) rotate(45deg); }
.wa-float:hover .wa-float-label { opacity: 1; transform: translateX(0); }

/* Volver arriba ------------------------------------------------------------- */
.to-top { position: fixed; bottom: 96px; right: 26px; z-index: 90; width: 48px; height: 48px; border-radius: 50%; border: 0; background: var(--grad-cyan); color: var(--navy-900); font-size: 1.3rem; font-weight: 700; cursor: pointer; box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(20px); transition: all 0.35s var(--ease); }
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(43, 214, 255, 0.5); }

/* Reveal on scroll ---------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }

/* Responsive ---------------------------------------------------------------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .cylinder-scene { transform: scale(0.85); }
  .gas-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid, .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); gap: 34px; }
  .timeline::before { display: none; }
  .zona-grid { grid-template-columns: 1fr; }
  .zona-map { min-height: 320px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav-links {
    position: fixed; top: 0; right: 0; height: 100vh; width: min(78vw, 320px); flex-direction: column;
    align-items: stretch; justify-content: flex-start; gap: 6px; padding: 92px 22px 22px;
    background: rgba(7, 21, 40, 0.97); backdrop-filter: blur(16px);
    transform: translateX(100%); transition: transform 0.4s var(--ease); box-shadow: -20px 0 60px rgba(0,0,0,.4);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { padding: 13px 16px; font-size: 1rem; }
  .btn-nav { margin-left: 0; text-align: center; margin-top: 8px; }
  .nav-toggle { display: flex; z-index: 101; }
  .grid-2 { grid-template-columns: 1fr; gap: 34px; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .section { padding: 70px 0; }
  .wa-float { right: 18px; bottom: 18px; width: 52px; height: 52px; }
  .to-top { right: 18px; bottom: 82px; }
}

@media (max-width: 520px) {
  .gas-grid { grid-template-columns: 1fr; }
  .service-grid, .industry-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}