/* ═══════════════════════════════════════════════
   CHALK — Design System
   Shared across index.html, agro.html, wheels.html
═══════════════════════════════════════════════ */

/* ── Tokens ── */
:root {
  /* Neutrals */
  --bg:         #f7f5f0;
  --bg-2:       #eeece6;
  --bg-card:    #ffffff;
  --ink:        #18180f;
  --ink-mid:    #3a3a2e;
  --ink-muted:  #787868;
  --ink-faint:  #b0ae9e;
  --border:     #dedad0;
  --border-dk:  #c8c4b4;
  --white:      #ffffff;

  /* Brand dark (home/nav) */
  --chalk:      #18180f;

  /* Agro palette */
  --agro:       #4a5c2f;
  --agro-mid:   #6b7c45;
  --agro-lt:    #c8d4a8;
  --agro-xlt:   #eef2e4;

  /* Wheels palette */
  --wheels:     #1e4580;
  --wheels-mid: #2f64b8;
  --wheels-lt:  #a8c0e8;
  --wheels-xlt: #e8f0fb;

  /* Typography */
  --font-head:  'Fraunces', Georgia, serif;
  --font-body:  'DM Sans', sans-serif;

  /* Radii */
  --r:   10px;
  --r-lg: 18px;
  --r-xl: 24px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ── Nav ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(1.25rem, 5vw, 4rem);
  height: 64px;
  background: rgba(247,245,240,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.3rem;
  font-family: var(--font-head); font-weight: 700; font-size: 1.25rem;
  color: var(--ink); letter-spacing: -0.01em; text-decoration: none;
}
.nav-logo em { font-style: italic; }
.nav-logo .dot-agro   { color: var(--agro); }
.nav-logo .dot-wheels { color: var(--wheels); }
.nav-logo .dot-home   { color: var(--ink-muted); }

.nav-center {
  display: flex; gap: 0.25rem; align-items: center;
}
.nav-pill {
  font-size: 0.83rem; font-weight: 500; color: var(--ink-muted);
  padding: 0.35rem 0.9rem; border-radius: 99px;
  transition: background .2s, color .2s;
  text-decoration: none;
}
.nav-pill:hover { background: var(--bg-2); color: var(--ink); }
.nav-pill.active-agro   { background: var(--agro-xlt); color: var(--agro); font-weight: 600; }
.nav-pill.active-wheels { background: var(--wheels-xlt); color: var(--wheels); font-weight: 600; }
.nav-pill.active-home   { background: var(--bg-2); color: var(--ink); font-weight: 600; }

.nav-right { display: flex; gap: 0.75rem; align-items: center; }
.lang-toggle {
  display: flex; border: 1px solid var(--border); border-radius: 99px; overflow: hidden;
}
.lang-btn {
  background: none; border: none; color: var(--ink-muted);
  font-family: var(--font-body); font-size: 0.73rem; font-weight: 600;
  letter-spacing: 0.05em; padding: 0.28rem 0.7rem; cursor: pointer;
  transition: background .2s, color .2s;
}
.lang-btn.active { background: var(--ink); color: var(--white); }
.lang-toggle-agro   { border-color: var(--agro); }
.lang-toggle-agro   .lang-btn.active { background: var(--agro);   color: var(--white); }
.lang-toggle-wheels { border-color: var(--wheels); }
.lang-toggle-wheels .lang-btn.active { background: var(--wheels); color: var(--white); }
.btn-nav-cta {
  font-family: var(--font-body); font-weight: 600; font-size: 0.83rem;
  padding: 0.45rem 1.1rem; border-radius: 99px; border: none; cursor: pointer;
  transition: opacity .2s, transform .15s;
  text-decoration: none; display: inline-block;
}
.btn-nav-cta:hover { opacity: .85; transform: translateY(-1px); }
.btn-nav-agro   { background: var(--agro);   color: var(--white); }
.btn-nav-wheels { background: var(--wheels); color: var(--white); }
.btn-nav-home   { background: var(--ink);    color: var(--white); }

/* hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px; background: var(--ink);
  border-radius: 2px; transition: transform .3s, opacity .3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0; z-index: 199;
  background: var(--bg); border-bottom: 1px solid var(--border);
  padding: 1.5rem 1.75rem 2rem; flex-direction: column; gap: 1.1rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-pill { font-size: 1rem; padding: 0.4rem 0; }
.mobile-menu .btn-nav-cta { text-align: center; padding: .7rem; border-radius: var(--r); }

@media(max-width:768px) {
  .nav-center, .btn-nav-cta { display: none; }
  .hamburger { display: flex; }
}


/* ── Footer ── */
footer {
  background: var(--ink);
  padding: 3rem clamp(1.5rem,6vw,5rem) 2rem;
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
@media(max-width:640px) { .footer-inner { grid-template-columns: 1fr; gap: 2rem; } }
.footer-brand { display: flex; align-items: center; gap: 1rem; }
.footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.4); line-height: 1.6; max-width: 220px; margin: 0; }
.footer-col h4 { font-size: 0.72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: rgba(255,255,255,0.35); margin-bottom: 1rem; }
.footer-col a { display: block; font-size: 0.875rem; color: rgba(255,255,255,0.55); margin-bottom: 0.6rem; transition: color .2s; }
.footer-col a:hover { color: var(--white); }
.footer-col a .badge {
  display: inline-block; font-size: 0.65rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; padding: .15rem .45rem; border-radius: 99px; margin-left: .4rem;
  vertical-align: middle;
}
.badge-agro   { background: var(--agro-xlt);   color: var(--agro); }
.badge-wheels { background: var(--wheels-xlt); color: var(--wheels); }
.footer-bottom {
  max-width: 1100px; margin: 1.75rem auto 0;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.footer-bottom p { font-size: 0.78rem; color: rgba(255,255,255,0.25); }
.footer-bottom a { font-size: 0.78rem; color: rgba(255,255,255,0.3); transition: color .2s; }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* ── Shared layout helpers ── */
.container { max-width: 1100px; margin: 0 auto; }
.section { padding: clamp(4rem,10vw,7rem) clamp(1.5rem,6vw,5rem); }
.section-label {
  font-size: 0.71rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; margin-bottom: .6rem;
}
.section-title {
  font-family: var(--font-head); font-weight: 700; letter-spacing: -.02em;
  font-size: clamp(1.7rem,3.5vw,2.7rem); line-height: 1.1; margin-bottom: .9rem;
  color: var(--ink);
}
.section-title em { font-style: italic; }
.section-sub {
  font-size: 1rem; color: var(--ink-muted); font-weight: 300;
  line-height: 1.7; max-width: 520px;
}
.s-header { margin-bottom: 3rem; }
.s-header.center { text-align: center; }
.s-header.center .section-sub { margin: 0 auto; }

/* ── Buttons ── */
.btn {
  display: inline-block; font-family: var(--font-body); font-weight: 600;
  font-size: .95rem; padding: .85rem 1.75rem; border-radius: var(--r);
  border: none; cursor: pointer; transition: background .2s, transform .15s, opacity .2s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); opacity: .9; }
.btn-agro   { background: var(--agro);   color: var(--white); }
.btn-wheels { background: var(--wheels); color: var(--white); }
.btn-dark   { background: var(--ink);    color: var(--white); }
.btn-ghost {
  background: transparent; color: var(--ink);
  border: 1.5px solid var(--border-dk);
}
.btn-ghost:hover { border-color: var(--ink-mid); }

/* ── Cards shared ── */
.card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.75rem;
  transition: border-color .2s, transform .2s;
}
.card:hover { transform: translateY(-3px); }

/* ── Reveal animation ── */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Staggered children */
.reveal-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
  transition-delay: calc(var(--reveal-i, 0) * 90ms);
}
.reveal-item.visible { opacity: 1; transform: translateY(0); }

@keyframes fadeUp { from{opacity:0;transform:translateY(18px)} to{opacity:1;transform:translateY(0)} }
@keyframes float  { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ── Mobile lang toggle always visible ── */
@media(max-width:768px) {
  .lang-toggle {
    display: flex;
  }
  .lang-btn {
    padding: 0.28rem 0.6rem;
  }
}

/* ── Focus visible ── */
/* Reseteo el outline por defecto del browser para manejarlo nosotros */
:focus { outline: none; }

/* Foco para navegación por teclado — solo se muestra cuando se usa teclado, no con mouse */
:focus-visible {
  outline: 2.5px solid var(--ink);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Botones y links de nav con color de acento correspondiente */
.btn-agro:focus-visible,
.btn-nav-agro:focus-visible  { outline-color: var(--agro); }

.btn-wheels:focus-visible,
.btn-nav-wheels:focus-visible { outline-color: var(--wheels); }

/* Inputs, selects y textareas: usamos box-shadow para no interferir con el borde existente */
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--ink) !important;
  box-shadow: 0 0 0 3px rgba(24, 24, 15, 0.15);
}

/* Foco dentro de páginas Agro */
.btn-agro ~ * input:focus-visible,
.contact-form input:focus-visible  { box-shadow: 0 0 0 3px rgba(74, 92, 47, 0.15); }

/* Hamburger button */
.hamburger:focus-visible {
  outline: 2.5px solid var(--ink);
  outline-offset: 4px;
  border-radius: var(--r);
}

/* Links del footer */
.footer-col a:focus-visible,
.footer-bottom a:focus-visible {
  outline-color: var(--white);
  border-radius: 2px;
}

/* ── Form validation ── */
.form-field.required label::after { content: ' *'; color: #c0392b; }
.field-error { font-size: .72rem; color: #c0392b; margin-top: .2rem; display: none; }
.field-error.show { display: block; }
.form-field input.invalid,
.form-field select.invalid,
.form-field textarea.invalid { border-color: #c0392b !important; }

/* Respeta la preferencia del sistema para reducir movimiento */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-item {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .mockup-wrap {
    animation: none !important;
  }
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}