/* ===================================================================
   RINAUTO — Ingeniería Automotriz
   Hoja de estilos principal. Mobile-first, sin frameworks.
   Paleta extraída del logo: grafito/carbono + cobre metálico + cromo.
=================================================================== */

/* ---------- Variables de marca (tema oscuro = base) ---------- */
:root {
  --color-bg: #17181b;
  --color-bg-alt: #1d1e22;
  --color-bg-elevated: #26272c;
  --color-border: #35363c;

  --color-copper: #c9722f;
  --color-copper-light: #e8a35c;
  --color-chrome: #e4e5e7;
  --color-chrome-dim: #9a9b9e;

  --color-text: #f2f2f0;
  --color-text-muted: #b7b8bb;

  --color-whatsapp: #25d366;
  --color-whatsapp-dark: #1ebe57;

  --font-heading: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Work Sans', system-ui, sans-serif;

  --radius: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --max-width: 1200px;
  --section-padding: clamp(3rem, 6vw, 6rem);
}

/* Variante clara automática, respetando la identidad de marca */
@media (prefers-color-scheme: light) {
  :root {
    --color-bg: #f4f3f1;
    --color-bg-alt: #ffffff;
    --color-bg-elevated: #ebeae7;
    --color-border: #ddd9d3;

    --color-text: #1c1d20;
    --color-text-muted: #55565a;
    --color-chrome-dim: #6c6d71;

    --shadow: 0 10px 30px rgba(20, 20, 20, 0.12);
  }
}

/* ---------- Reset básico ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: 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 {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.15;
  margin: 0 0 0.6em;
  color: var(--color-chrome);
}
p { margin: 0 0 1em; color: var(--color-text-muted); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.85em 1.6em;
  border-radius: 999px;
  font-family: var(--font-heading);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: #0b1a10;
}
.btn-whatsapp:hover { background: var(--color-whatsapp-dark); }

.btn-outline {
  border-color: var(--color-chrome-dim);
  color: var(--color-chrome);
  background: transparent;
}
.btn-outline:hover { border-color: var(--color-copper-light); color: var(--color-copper-light); }

.btn-lg { padding: 1em 2em; font-size: 1.05rem; }
.btn-sm { padding: 0.6em 1.2em; font-size: 0.85rem; }
.btn-nav { display: none; }

.btn[aria-disabled="true"] { opacity: 0.5; pointer-events: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 300; /* por encima del botón flotante de WhatsApp (z-index 200), para que el menú móvil lo cubra bien al abrirse */
  background: rgba(23, 24, 27, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}
@media (prefers-color-scheme: light) {
  .site-header { background: rgba(244, 243, 241, 0.92); }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
  position: relative;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  background: #1d1e22; /* siempre oscuro: el logo se diseñó sobre grafito, así se lee igual en ambos temas */
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
}
.brand-logo { height: 48px; width: auto; display: block; }

.nav-toggle-label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 110;
}
.nav-toggle-label span {
  width: 24px;
  height: 2px;
  background: var(--color-chrome);
  display: block;
}

.main-nav {
  position: fixed;
  inset: 0 0 0 30%;
  background: var(--color-bg-elevated);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 1.5rem;
  padding: 2rem;
  transform: translateX(100%);
  transition: transform 0.25s ease;
  border-left: 1px solid var(--color-border);
}
.main-nav a {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 1.1rem;
  color: var(--color-chrome);
}
.main-nav a:hover { color: var(--color-copper-light); }

.nav-toggle-input:checked ~ .main-nav {
  transform: translateX(0);
}

/* Pantallas grandes: el menú deja de ser un panel superpuesto y pasa a ser
   una barra horizontal fija en el header, con todos los tópicos en línea. */
@media (min-width: 900px) {
  .nav-toggle-label { display: none; }

  .main-nav {
    position: static;
    inset: auto;
    background: transparent;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: 1.75rem;
    padding: 0;
    transform: none;
    border-left: none;
  }
  .main-nav a { font-size: 0.9rem; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.5rem, 10vw, 7rem) 0 clamp(2.5rem, 6vw, 4rem);
  background:
    radial-gradient(circle at 15% 20%, rgba(201, 114, 47, 0.18), transparent 45%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}
.hero-texture {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.03) 0 2px, transparent 2px 6px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,0.02) 0 2px, transparent 2px 6px);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 780px; }

.eyebrow, .section-eyebrow {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
  color: var(--color-copper-light);
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  background: linear-gradient(90deg, var(--color-copper) 0%, var(--color-copper-light) 45%, var(--color-chrome) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead { font-size: 1.1rem; max-width: 60ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.5rem 0 2.5rem; }

/* Franja de highlights (recrea el banner de marca en HTML/CSS real) */
.hero-highlights {
  position: relative;
  z-index: 1;
  margin-top: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(90deg, #101114 0%, #1a1b1f 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.hero-highlights-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
@media (min-width: 640px) {
  .hero-highlights-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .hero-highlights-inner { grid-template-columns: repeat(4, 1fr); }
}
.highlight-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 0.5rem;
  border-bottom: 1px solid rgba(228, 229, 231, 0.08);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 0.9rem;
  color: var(--color-chrome);
}
@media (min-width: 640px) {
  .highlight-item:not(:last-child) { border-right: 1px solid rgba(228, 229, 231, 0.08); }
  .highlight-item { border-bottom: none; justify-content: center; text-align: center; }
}
.highlight-icon { font-size: 1.3rem; color: var(--color-copper-light); }

/* ---------- Sistema de pestañas (SPA en una sola página) ----------
   Cada sección de contenido principal es un .tab-content: solo la que
   tiene .active se muestra. El JS de app.js controla el cambio; sin JS,
   el <noscript> del <head> revierte a página larga con scroll. */
.tab-content { display: none; }
.tab-content.active { display: block; }

.main-nav a.active,
.footer-links a.active {
  color: var(--color-copper-light);
}
.main-nav a.active { position: relative; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--color-copper-light);
}

/* ---------- Secciones genéricas ---------- */
.section {
  padding: var(--section-padding) 0;
}
.section--alt { background: var(--color-bg-alt); }

/* Subsección dentro de una pestaña (ej. cotizador dentro de Servicios,
   galería dentro de Nosotros): separador visual sin ser una pestaña nueva. */
.subsection {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px dashed var(--color-border);
}
.subsection-title {
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  color: var(--color-chrome);
}
.section-subtitle {
  max-width: 65ch;
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}
.section-cta { margin-top: 2.5rem; }

/* ---------- Grids y tarjetas ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid-services { grid-template-columns: 1fr; }
.grid-parts { grid-template-columns: 1fr; }
.grid-gallery { grid-template-columns: 1fr; }
.grid-testimonials { grid-template-columns: 1fr; }
.grid-about { grid-template-columns: 1fr; margin-bottom: 1rem; }

@media (min-width: 640px) {
  .grid-services { grid-template-columns: repeat(2, 1fr); }
  .grid-gallery { grid-template-columns: repeat(2, 1fr); }
  .grid-testimonials { grid-template-columns: repeat(2, 1fr); }
  .grid-about { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .btn-nav { display: inline-flex; }
}
@media (min-width: 960px) {
  .grid-services { grid-template-columns: repeat(3, 1fr); }
  .grid-parts { grid-template-columns: repeat(3, 1fr); }
  .grid-gallery { grid-template-columns: repeat(3, 1fr); }
  .grid-testimonials { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--color-copper); transform: translateY(-3px); }

.card-service .card-icon { font-size: 1.8rem; display: block; margin-bottom: 0.75rem; }
.card-service h3 { font-size: 1.05rem; }

.check-list li {
  padding: 0.4rem 0 0.4rem 1.6rem;
  position: relative;
  color: var(--color-text-muted);
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-copper-light);
  font-weight: 700;
}

.card-brands-img { display: block; width: 100%; height: auto; }

/* Placa de respaldo de proveedor: acabado tipo placa metálica grabada,
   a juego con la paleta cobre/cromo, mientras no haya un logo real que colocar. */
.supplier-badge {
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(201, 114, 47, 0.1), rgba(228, 229, 231, 0.04));
  text-align: center;
}
.supplier-badge-label {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}
.supplier-badge-plate {
  display: inline-flex;
  background: #ffffff;
  padding: 0.9rem 1.5rem;
  border-radius: 6px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}
.supplier-badge-logo { height: 32px; width: auto; display: block; }

.supplier-badge-plate--wide {
  display: block;
  width: 100%;
  margin-top: 0.5rem;
  padding: 1rem;
}

/* ---------- Cotizador ---------- */
.quote-box {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}
.quote-form { display: flex; flex-direction: column; gap: 0.75rem; }
.quote-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.quote-item:hover { border-color: var(--color-copper); }
.quote-item input { width: 18px; height: 18px; accent-color: var(--color-copper); flex-shrink: 0; }
.quote-item span { color: var(--color-text); }

.quote-summary {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--color-border);
}
.quote-summary h3 { font-size: 1.1rem; }
.quote-summary-text { white-space: pre-line; color: var(--color-text); }
.quote-note { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 0.75rem; }

/* ---------- Galería ---------- */
.gallery-pair {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}
.gallery-placeholder {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  border: 1px dashed var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(135deg, var(--color-bg-elevated) 0 10px, var(--color-bg) 10px 20px);
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}
.gallery-photo {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.gallery-placeholder--after {
  background: repeating-linear-gradient(135deg, rgba(201,114,47,0.15) 0 10px, var(--color-bg-elevated) 10px 20px);
  color: var(--color-copper-light);
}
.gallery-pair figcaption {
  grid-column: 1 / -1;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ---------- Testimonios ---------- */
.card-testimonial p {
  color: var(--color-text);
  font-size: 1.02rem;
  font-style: italic;
}
.card-testimonial footer { color: var(--color-copper-light); font-size: 0.9rem; }
.card-testimonial time { color: var(--color-text-muted); font-style: normal; }

/* ---------- Contacto / mapa ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 900px) {
  .contact-grid { grid-template-columns: 1fr 1.2fr; }
}
.contact-info h3 { font-size: 1rem; margin-top: 1.5rem; }
.contact-info h3:first-child { margin-top: 0; }
.contact-info a { color: var(--color-copper-light); }
.contact-info a:hover { text-decoration: underline; }

.hours-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.social-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.social-links a {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.4em 1em;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-heading);
}
.social-links a:hover { border-color: var(--color-copper); color: var(--color-copper-light); }

.contact-map {
  min-height: 320px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.contact-map iframe { width: 100%; height: 100%; min-height: 320px; }

/* ---------- Botón flotante WhatsApp ---------- */
.whatsapp-float {
  position: fixed;
  right: max(1.25rem, env(safe-area-inset-right, 0px));
  bottom: max(1.25rem, env(safe-area-inset-bottom, 0px));
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-whatsapp);
  color: #0b1a10;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  z-index: 200;
  transition: transform 0.15s ease;
}
.whatsapp-float:hover { transform: scale(1.08); background: var(--color-whatsapp-dark); }

/* ---------- Footer ---------- */
.site-footer {
  background: #101114;
  border-top: 1px solid var(--color-border);
  padding-top: 3rem;
}
@media (prefers-color-scheme: light) {
  .site-footer { background: #1c1d20; }
  .site-footer, .site-footer p, .site-footer a { color: #e9e8e6; }
}
.footer-inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  padding-bottom: 2rem;
}
@media (min-width: 900px) {
  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; }
}
.footer-logo { height: 64px; width: auto; margin-bottom: 1rem; border-radius: 6px; }
.footer-links { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-links a:hover { color: var(--color-copper-light); }
.footer-contact p { margin-bottom: 0.5rem; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---------- Utilidades de accesibilidad ---------- */
:focus-visible {
  outline: 2px solid var(--color-copper-light);
  outline-offset: 2px;
}