/* ==========================================================================
   PAFE — Refrigeración y Reparaciones Hogar
   Sistema de diseño: Flat Design / Trust & Authority + Conversion
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------ */
:root {
  --color-primary: #1E40AF;
  --color-on-primary: #FFFFFF;
  --color-primary-dark: #1B3A9C;
  --color-secondary: #3B82F6;
  --color-accent: #EA580C;
  --color-on-accent: #FFFFFF;
  --color-accent-dark: #C2410C;
  --color-background: #EFF6FF;
  --color-foreground: #1E3A8A;
  --color-card: #FFFFFF;
  --color-card-foreground: #1E3A8A;
  --color-muted: #E9EEF6;
  --color-muted-foreground: #475569;
  --color-border: #BFDBFE;
  --color-ink: #0F172A;
  --color-whatsapp: #25D366;
  --color-whatsapp-dark: #1EB855;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.09rem);
  --step-1: clamp(1.2rem, 1.12rem + 0.4vw, 1.42rem);
  --step-2: clamp(1.44rem, 1.3rem + 0.7vw, 1.85rem);
  --step-3: clamp(1.73rem, 1.5rem + 1.15vw, 2.4rem);
  --step-4: clamp(2.07rem, 1.7rem + 1.85vw, 3.13rem);

  --radius: 12px;
  --radius-sm: 8px;
  --container: 1140px;
  --transition: 180ms ease;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-card);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; }

h1, h2, h3, h4 { line-height: 1.2; color: var(--color-foreground); font-weight: 800; }
h1 { font-size: var(--step-4); letter-spacing: -0.02em; }
h2 { font-size: var(--step-3); letter-spacing: -0.015em; }
h3 { font-size: var(--step-1); }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Layout ------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section--muted { background: var(--color-background); }

.section__head { max-width: 46rem; margin-bottom: 2.5rem; }
.section__head--center { margin-inline: auto; text-align: center; }
.section__kicker {
  display: inline-block;
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.6rem;
}
.section__lead {
  margin-top: 0.9rem;
  font-size: var(--step-1);
  color: var(--color-muted-foreground);
  line-height: 1.5;
}

/* --- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--step-0);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition);
}
.btn svg { flex-shrink: 0; width: 1.25em; height: 1.25em; }

.btn--wa { background: var(--color-whatsapp); color: #fff; }
.btn--wa:hover { background: var(--color-whatsapp-dark); }

.btn--accent { background: var(--color-accent); color: var(--color-on-accent); }
.btn--accent:hover { background: var(--color-accent-dark); }

.btn--primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn--primary:hover { background: var(--color-primary-dark); }

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

.btn--ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}
.btn--ghost-light:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; }

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

/* --- Header ------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-ink);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.header__bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 72px;
}
.header__logo { display: flex; align-items: center; margin-right: auto; }
.header__logo img { height: 44px; width: auto; }

.nav { display: flex; align-items: center; gap: 0.25rem; }
.nav a {
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: var(--step--1);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition);
}
.nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.nav a[aria-current="page"] { color: #fff; background: rgba(255, 255, 255, 0.16); }

.header__cta { display: inline-flex; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
}
.nav-toggle:hover { background: rgba(255, 255, 255, 0.12); }

@media (max-width: 900px) {
  .nav {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.25rem 1.25rem;
    background: var(--color-ink);
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    display: none;
  }
  .nav[data-open="true"] { display: flex; }
  .nav a { padding: 0.9rem 0.5rem; font-size: var(--step-0); border-bottom: 1px solid rgba(255, 255, 255, 0.12); }
  .nav a:last-child { border-bottom: 0; }
  .nav-toggle { display: inline-flex; }
  .header__cta { display: none; }
}

/* --- Hero --------------------------------------------------------------- */
.hero {
  position: relative;
  background: var(--color-primary);
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(30, 58, 138, 0.94) 0%, rgba(30, 64, 175, 0.82) 55%, rgba(30, 64, 175, 0.55) 100%);
}
.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(3.5rem, 8vw, 6rem);
  max-width: 42rem;
}
.hero h1 { color: #fff; }
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  margin-bottom: 1.25rem;
  background: var(--color-accent);
  border-radius: 999px;
  font-size: var(--step--1);
  font-weight: 700;
}
.hero__lead {
  margin-top: 1.1rem;
  font-size: var(--step-1);
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.92);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}
.hero__note {
  margin-top: 1.25rem;
  font-size: var(--step--1);
  color: rgba(255, 255, 255, 0.8);
}

/* --- Page hero (páginas internas) --------------------------------------- */
.page-hero {
  position: relative;
  background: var(--color-primary);
  color: #fff;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(30, 58, 138, 0.95) 0%, rgba(30, 64, 175, 0.86) 60%, rgba(30, 64, 175, 0.62) 100%);
}
.page-hero__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-hero__inner { position: relative; z-index: 1; padding-block: clamp(2.5rem, 6vw, 4rem); max-width: 44rem; }
.page-hero h1 { color: #fff; font-size: var(--step-3); }
.page-hero p { margin-top: 0.9rem; font-size: var(--step-1); color: rgba(255, 255, 255, 0.92); line-height: 1.5; }
.page-hero .hero__actions { margin-top: 1.6rem; }

.breadcrumb { font-size: var(--step--1); color: rgba(255, 255, 255, 0.78); margin-bottom: 0.9rem; }
.breadcrumb a { color: inherit; text-decoration: none; font-weight: 600; }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb span { margin-inline: 0.4rem; }

/* --- Lista de fallas ---------------------------------------------------- */
.faults { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); list-style: none; padding: 0; }
.faults li {
  display: flex;
  gap: 0.8rem;
  padding: 1.1rem 1.2rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
}
.faults svg { flex-shrink: 0; width: 22px; height: 22px; color: var(--color-accent); margin-top: 3px; }
.faults strong { display: block; color: var(--color-foreground); }
.faults span { font-size: var(--step--1); color: var(--color-muted-foreground); }

/* --- Lista de trabajos -------------------------------------------------- */
.worklist { list-style: none; padding: 0; display: grid; gap: 0.7rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.worklist li { display: flex; gap: 0.6rem; align-items: flex-start; font-size: var(--step--1); }
.worklist svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--color-primary); margin-top: 3px; }

/* --- Zonas -------------------------------------------------------------- */
.zonas { display: flex; flex-wrap: wrap; gap: 0.6rem; padding: 0; margin-top: 1.5rem; list-style: none; }
.zonas li {
  padding: 0.5rem 0.9rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--color-foreground);
}

/* --- FAQ ---------------------------------------------------------------- */
.faq { display: grid; gap: 0.75rem; max-width: 48rem; }
.faq details {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq summary {
  padding: 1.1rem 1.25rem;
  font-weight: 700;
  color: var(--color-foreground);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+';
  font-size: 1.4em;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { background: var(--color-background); }
.faq p { padding: 0 1.25rem 1.25rem; color: var(--color-muted-foreground); }

/* --- Formulario --------------------------------------------------------- */
.form { display: grid; gap: 1.1rem; }
.form__row { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.form label { display: block; font-weight: 700; font-size: var(--step--1); color: var(--color-foreground); margin-bottom: 0.4rem; }
.form input, .form select, .form textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.9rem;
  font: inherit;
  font-size: var(--step-0);
  color: var(--color-ink);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}
.form textarea { min-height: 130px; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--color-primary); }
.form__hint { font-size: var(--step--1); color: var(--color-muted-foreground); }

/* --- Trust bar ---------------------------------------------------------- */
.trustbar { background: var(--color-foreground); color: #fff; }
.trustbar__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.25rem 1.5rem;
  padding-block: 1.5rem;
}
.trustbar__item { display: flex; align-items: center; gap: 0.7rem; font-size: var(--step--1); }
.trustbar__item svg { flex-shrink: 0; width: 22px; height: 22px; color: var(--color-secondary); }
.trustbar__item strong { display: block; font-size: var(--step-0); font-weight: 700; }
.trustbar__item span { color: rgba(255, 255, 255, 0.75); }

/* --- Cards / grids ------------------------------------------------------ */
.grid { display: grid; gap: 1.5rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  display: flex;
  flex-direction: column;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.card:hover { border-color: var(--color-primary); }
.card__media { aspect-ratio: 16 / 10; background: var(--color-muted); }
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__body { display: flex; flex-direction: column; flex: 1; padding: 1.4rem; }
.card__body p { margin-top: 0.6rem; color: var(--color-muted-foreground); }
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--color-muted);
  font-weight: 700;
  font-size: var(--step--1);
  color: var(--color-primary);
  text-decoration: none;
}
.card__link::after { content: '→'; transition: transform var(--transition); }
.card:hover .card__link::after { transform: translateX(3px); }
.card__link:hover { color: var(--color-accent); }

/* Feature list */
.features { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.feature { display: flex; gap: 1rem; }
.feature__icon {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: var(--color-background);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}
.feature__icon svg { width: 24px; height: 24px; }
.feature h3 { font-size: var(--step-0); }
.feature p { margin-top: 0.35rem; font-size: var(--step--1); color: var(--color-muted-foreground); }

/* Split (image + text) */
.split {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: center;
}
.split__media { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--color-border); }
.split__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.checklist { list-style: none; padding: 0; margin-top: 1.5rem; display: grid; gap: 0.85rem; }
.checklist li { display: flex; gap: 0.7rem; align-items: flex-start; }
.checklist svg { flex-shrink: 0; width: 22px; height: 22px; color: var(--color-accent); margin-top: 2px; }

/* --- Contact / info blocks --------------------------------------------- */
.info-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.6rem;
}
.info-card h3 { font-size: var(--step-0); margin-bottom: 0.9rem; }
.info-card dl { display: grid; gap: 0.5rem; margin: 0; }
.info-card dt { font-weight: 700; font-size: var(--step--1); color: var(--color-muted-foreground); }
.info-card dd { margin: 0 0 0.6rem; }
.info-card a { color: var(--color-primary); font-weight: 600; }

/* --- CTA band ----------------------------------------------------------- */
.cta-band { background: var(--color-accent); color: #fff; }
.cta-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.75rem;
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
}
.cta-band h2 { color: #fff; max-width: 34rem; }
.cta-band p { margin-top: 0.6rem; color: rgba(255, 255, 255, 0.92); max-width: 34rem; }
.cta-band .btn--wa { background: #fff; color: var(--color-accent); }
.cta-band .btn--wa:hover { background: rgba(255, 255, 255, 0.88); }

/* --- Footer ------------------------------------------------------------- */
.footer { background: var(--color-ink); color: rgba(255, 255, 255, 0.72); font-size: var(--step--1); }
.footer__grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
}
.footer h3 { color: #fff; font-size: var(--step-0); margin-bottom: 0.9rem; }
.footer ul { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.footer a { color: rgba(255, 255, 255, 0.72); text-decoration: none; transition: color var(--transition); }
.footer a:hover { color: #fff; }
.footer__logo { height: 42px; width: auto; margin-bottom: 1rem; }
.footer__social { display: flex; gap: 0.6rem; margin-top: 1rem; }
.footer__social a {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), border-color var(--transition);
}
.footer__social a:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.45); }
.footer__social svg { width: 20px; height: 20px; }
.footer__bottom {
  padding-block: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  font-size: var(--step--1);
}

/* --- Floating WhatsApp -------------------------------------------------- */
.wa-float {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.1rem;
  background: var(--color-whatsapp);
  color: #fff;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.22);
  transition: background-color var(--transition);
}
.wa-float:hover { background: var(--color-whatsapp-dark); }
.wa-float svg { width: 26px; height: 26px; }

@media (max-width: 560px) {
  .wa-float span { display: none; }
  .wa-float { padding: 0.9rem; }
}

/* --- Utilities ---------------------------------------------------------- */
.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;
}
.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
}
.skip-link:focus { left: 1rem; top: 1rem; }