/* ==========================================================================
   Gas LP CR — Hoja de estilos
   Paleta industrial: grafito / negro + acentos naranja y azul de advertencia
   ========================================================================== */

:root {
  /* Colores base */
  --color-bg: #14161a;
  --color-bg-alt: #1c2024;
  --color-surface: #22262b;
  --color-surface-hover: #292e34;
  --color-border: #33393f;

  --color-text: #f2f2f0;
  --color-text-muted: #a8adb3;
  --color-text-dim: #6d7379;

  /* Acentos de advertencia */
  --color-orange: #ff6b1a;
  --color-orange-dark: #c9432b;
  --color-blue: #3d8bff;
  --color-blue-dark: #1f5fbf;

  /* Tipografía */
  --font-heading: 'Oswald', 'Arial Narrow', Impact, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* Layout */
  --header-height: 76px;
  --max-width: 1200px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
  --transition: 0.2s ease;
}

/* ---------- Reset básico ---------- */
* ,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 12px);
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 0.5em;
  line-height: 1.15;
}

p {
  margin: 0 0 1em;
  color: var(--color-text-muted);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 88px 0;
}

/* Franja de advertencia decorativa (rayas industriales) */
.hazard-strip {
  height: 8px;
  width: 100%;
  background: repeating-linear-gradient(
    -45deg,
    var(--color-orange),
    var(--color-orange) 18px,
    #17181a 18px,
    #17181a 36px
  );
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background-color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background-color: var(--color-orange);
  color: #16171a;
}

.btn--primary:hover {
  background-color: #ff7f3d;
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-blue);
  color: var(--color-blue);
}

.btn--whatsapp {
  background-color: #1f9e56;
  color: #ffffff;
}

.btn--whatsapp:hover {
  background-color: #24b563;
}

.btn--block {
  width: 100%;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ---------- Encabezado fijo ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background-color: rgba(20, 22, 26, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.brand__mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.brand__name-cr {
  color: var(--color-orange);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav__links {
  display: flex;
  gap: 28px;
}

.main-nav__links a {
  font-size: 0.92rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.main-nav__links a:hover {
  color: var(--color-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* El WhatsApp dentro del menú (para móvil) va oculto en escritorio;
   en escritorio se usa el de .header-actions--desktop en su lugar. */
.main-nav > .header-actions {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bar::before {
  top: -7px;
}

.nav-toggle__bar::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  top: 0;
  transform: rotate(45deg);
  background-color: var(--color-orange);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  top: 0;
  transform: rotate(-45deg);
  background-color: var(--color-orange);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
  isolation: isolate;
}

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 22, 26, 0.55) 0%, rgba(20, 22, 26, 0.88) 78%, rgba(20, 22, 26, 1) 100%);
  z-index: -1;
}

.hero__content {
  max-width: 720px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-orange);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero__eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  background-color: var(--color-orange);
  display: inline-block;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  color: var(--color-text);
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--color-orange);
}

.hero__lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 560px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.hero__coverage {
  margin-top: 40px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

.hero__coverage svg {
  width: 18px;
  height: 18px;
  color: var(--color-blue);
  flex-shrink: 0;
}

/* ---------- Encabezados de sección ---------- */
.section-heading {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-heading__eyebrow {
  display: inline-block;
  color: var(--color-blue);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  color: var(--color-text);
}

.section-heading p {
  margin-top: 12px;
}

.section--alt {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* ---------- Servicios ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 26px;
  transition: transform var(--transition), border-color var(--transition), background-color var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-orange);
  background-color: var(--color-surface-hover);
}

.service-card__icon {
  width: 64px;
  height: 64px;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.15rem;
  color: var(--color-text);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.94rem;
  margin-bottom: 0;
}

/* ---------- Por qué elegirnos ---------- */
.why-us {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 28px;
}

.why-card {
  text-align: center;
  padding: 12px;
}

.why-card__number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  border: 2px solid var(--color-orange);
  color: var(--color-orange);
  font-family: var(--font-heading);
  font-size: 1.3rem;
}

.why-card h3 {
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: 8px;
}

.why-card p {
  font-size: 0.92rem;
}

/* ---------- Contacto ---------- */
.contact {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: stretch;
}

.contact__info h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  color: var(--color-text);
}

.contact__list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact__icon {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-orange);
}

.contact__icon svg {
  width: 22px;
  height: 22px;
}

.contact__item h4 {
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: normal;
  font-size: 0.98rem;
  color: var(--color-text);
  margin-bottom: 2px;
}

.contact__item p {
  margin-bottom: 0;
  font-size: 0.94rem;
}

.contact__item .placeholder-note {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--color-text-dim);
  font-style: italic;
}

.contact-card {
  background: linear-gradient(160deg, var(--color-surface) 0%, var(--color-bg-alt) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  text-align: center;
}

.contact-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  color: #1f9e56;
}

.contact-card h3 {
  color: var(--color-text);
  font-size: 1.25rem;
}

.contact-card p {
  font-size: 0.92rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background-color: #0e0f11;
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.footer-brand svg {
  width: 20px;
  height: 20px;
  color: var(--color-orange);
}

/* ---------- Botón flotante de WhatsApp ---------- */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #1f9e56;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  z-index: 999;
  transition: transform var(--transition), background-color var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.06);
  background-color: #24b563;
}

.whatsapp-float svg {
  width: 30px;
  height: 30px;
  color: #ffffff;
}

/* ---------- Utilidades ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .contact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  section {
    padding: 64px 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav__links {
    flex-direction: column;
    gap: 4px;
  }

  .main-nav__links a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .header-actions--desktop {
    display: none;
  }

  .main-nav > .header-actions {
    display: flex;
    margin-top: 12px;
  }

  .main-nav .btn {
    width: 100%;
  }

  .whatsapp-float {
    width: 54px;
    height: 54px;
    bottom: 18px;
    right: 18px;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
}