/* Buenos Aires City Bus — Site v2 (Agency build)
   Mobile-first • Performance-first • Accessible components
   Author: Agency team (UX/UI + Frontend + SEO)
*/

/* ---------
   Design tokens
--------- */
:root{
  --color-primary:#E11D2E; /* Bus red */
  --color-primary-600:#C91524;
  --color-secondary:#111827; /* charcoal */
  --color-text:#0F172A;
  --color-muted:#475569;
  --color-border:#E2E8F0;
  --color-bg:#FFFFFF;
  --color-bg-soft:#F8FAFC;
  --color-success:#16A34A;
  --color-warning:#F59E0B;

  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:22px;

  --shadow-sm: 0 1px 2px rgba(2,6,23,.06), 0 1px 1px rgba(2,6,23,.04);
  --shadow-md: 0 10px 25px rgba(2,6,23,.08);

  --container: 1120px;

  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 2rem;
  --space-8: 2.5rem;
  --space-9: 3rem;
  --space-10: 4rem;

  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  --font-display: var(--font-sans);

  --h1: clamp(1.75rem, 2.2vw + 1rem, 3rem);
  --h2: clamp(1.35rem, 1.6vw + .9rem, 2.2rem);
  --h3: clamp(1.1rem, .9vw + .85rem, 1.5rem);
  --p: 1rem;
}

/* ---------
   Base
--------- */
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--color-text);
  background:var(--color-bg);
  line-height:1.55;
}
img{max-width:100%; height:auto; display:block;}
a{color:inherit;}
a:hover{color:var(--color-primary);}
p{margin:0 0 var(--space-4) 0; color:var(--color-muted);}
h1,h2,h3,h4{margin:0 0 var(--space-3) 0; line-height:1.15; letter-spacing:-.02em; color:var(--color-text);}
h1{font-size:var(--h1); font-family:var(--font-display);}
h2{font-size:var(--h2);}
h3{font-size:var(--h3);}
small{color:var(--color-muted);}
ul{margin:0; padding-left:1.25rem;}
li{margin:.25rem 0; color:var(--color-muted);}
:focus-visible{outline:3px solid rgba(225,29,46,.35); outline-offset:3px; border-radius:8px;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important; animation:none !important;}
}

/* ---------
   Layout utilities
--------- */
.container{
  width:min(100%, var(--container));
  margin-inline:auto;
  padding-inline:var(--space-5);
}
.section{
  padding-block: var(--space-9);
}
.section--soft{
  background:var(--color-bg-soft);
}
.grid{
  display:grid;
  gap:var(--space-6);
}
.grid-2{grid-template-columns:1fr;}
.grid-3{grid-template-columns:1fr;}
@media (min-width: 900px){
  .grid-2{grid-template-columns:1.2fr .8fr;}
  .grid-3{grid-template-columns:repeat(3, 1fr);}
}
.stack{display:flex; flex-direction:column; gap:var(--space-4);}
.row{display:flex; gap:var(--space-4); flex-wrap:wrap; align-items:center;}
.row--between{justify-content:space-between;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.25rem .6rem;
  border-radius:999px;
  background:rgba(225,29,46,.08);
  color:var(--color-primary);
  font-weight:700;
  font-size:.85rem;
}
.kicker{
  color:var(--color-primary);
  font-weight:800;
  letter-spacing:.06em;
  text-transform:uppercase;
  font-size:.8rem;
}

/* ---------
   Buttons / links
--------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6rem;
  padding:.9rem 1.15rem;
  border-radius:999px;
  border:1px solid transparent;
  font-weight:800;
  text-decoration:none;
  cursor:pointer;
  transition:transform .08s ease, background .15s ease, border-color .15s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.98);}
.btn-primary{
  background:var(--color-primary);
  color:#fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover{background:var(--color-primary-600); color:#fff;}
.btn-secondary{
  background:#fff;
  border-color:var(--color-border);
  color:var(--color-text);
}
.btn-secondary:hover{border-color:#CBD5E1;}
.btn-link{
  color:var(--color-primary);
  font-weight:800;
  text-decoration:none;
}
.btn-link:hover{text-decoration:underline;}

.btn-icon{
  width:42px;
  height:42px;
  border-radius:999px;
  border:1px solid var(--color-border);
  background:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}

/* ---------
   Header / Nav
--------- */
.skip-link{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px; height:1px;
  overflow:hidden;
}
.skip-link:focus{
  left:var(--space-4);
  top:var(--space-4);
  width:auto; height:auto;
  padding:.75rem 1rem;
  background:#fff;
  border:2px solid var(--color-primary);
  border-radius:12px;
  z-index:99999;
}

.header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom:1px solid rgba(226,232,240,.8);
}
.header__bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-block: var(--space-3);
  gap:var(--space-4);
}
.brand{
  display:flex;
  align-items:center;
  gap:var(--space-3);
  text-decoration:none;
}
.brand img{width:160px; height:auto;}
.nav{
  display:none;
  align-items:center;
  gap:var(--space-4);
}
.nav a{
  text-decoration:none;
  font-weight:800;
  color:var(--color-text);
  padding:.35rem .55rem;
  border-radius:12px;
}
.nav a:hover{background:rgba(15,23,42,.04); color:var(--color-primary);}
.header__actions{display:flex; align-items:center; gap:var(--space-3);}

.lang{
  position:relative;
}
.lang__btn{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.5rem .65rem;
  border:1px solid var(--color-border);
  border-radius:999px;
  background:#fff;
  cursor:pointer;
  font-weight:800;
}
.lang__btn img{width:18px; height:18px;}
.lang__menu{
  position:absolute;
  top:calc(100% + .5rem);
  right:0;
  width:220px;
  background:#fff;
  border:1px solid var(--color-border);
  border-radius:16px;
  box-shadow: var(--shadow-md);
  padding:.35rem;
  display:none;
}
.lang__menu a{
  display:flex;
  align-items:center;
  gap:.6rem;
  padding:.7rem .8rem;
  border-radius:12px;
  text-decoration:none;
  font-weight:800;
}
.lang__menu a:hover{background:rgba(15,23,42,.04); color:var(--color-primary);}
.lang[data-open="true"] .lang__menu{display:block;}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.6rem .8rem;
  border:1px solid var(--color-border);
  border-radius:999px;
  background:#fff;
  cursor:pointer;
  font-weight:800;
}
.nav-toggle span{display:inline-block; width:18px; height:2px; background:var(--color-text); position:relative;}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px; height:2px;
  background:var(--color-text);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.mobile-nav{
  position:fixed;
  inset:0;
  background:rgba(2,6,23,.55);
  display:none;
  z-index:2000;
}
.mobile-nav[data-open="true"]{display:block;}
.mobile-nav__panel{
  position:absolute;
  right:0;
  top:0;
  height:100%;
  width:min(92vw, 380px);
  background:#fff;
  padding:var(--space-6);
  display:flex;
  flex-direction:column;
  gap:var(--space-4);
}
.mobile-nav__panel a{
  text-decoration:none;
  font-weight:900;
  font-size:1.05rem;
  padding:.6rem .2rem;
}
.mobile-nav__panel a:hover{color:var(--color-primary);}
.mobile-nav__close{
  align-self:flex-end;
}

@media (min-width: 1024px){
  .nav{display:flex;}
  .nav-toggle{display:none;}
}

/* ---------
   Hero
--------- */
.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid rgba(226,232,240,.8);
}
.hero__media{
  position:absolute;
  inset:0;
  z-index:0;
}
.hero__media img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(1.05);
}
.hero__overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(2,6,23,.75) 0%, rgba(2,6,23,.40) 55%, rgba(2,6,23,.10) 100%);
}
.hero__content{
  position:relative;
  z-index:1;
  padding-block: clamp(3rem, 6vw, 5.5rem);
}
.hero__content h1{color:#fff;}
.hero__content p{color:rgba(255,255,255,.85); font-size:1.05rem; max-width: 60ch;}
.hero__pills{display:flex; flex-wrap:wrap; gap:.5rem; margin-top:var(--space-4);}
.pill{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.45rem .75rem;
  border-radius:999px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
  color:#fff;
  font-weight:800;
  font-size:.92rem;
}
.pill img{width:18px; height:18px; filter:brightness(0) invert(1); opacity:.92;}

.hero__card{
  margin-top:var(--space-6);
  background:rgba(255,255,255,.96);
  border:1px solid rgba(226,232,240,.9);
  border-radius:var(--radius-lg);
  padding:var(--space-5);
  box-shadow: var(--shadow-md);
}
.form-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--space-3);
}
@media (min-width: 900px){
  .form-grid{grid-template-columns: 1.2fr 1fr 1fr 1fr auto;}
}
.field{
  display:flex;
  flex-direction:column;
  gap:.35rem;
}
label{font-weight:900; font-size:.92rem; color:var(--color-text);}
select, input{
  padding:.8rem .85rem;
  border:1px solid var(--color-border);
  border-radius:14px;
  background:#fff;
  font-size:1rem;
}
select:focus, input:focus{outline:none; border-color:rgba(225,29,46,.35); box-shadow: 0 0 0 4px rgba(225,29,46,.12);}

.help{
  display:flex;
  align-items:center;
  gap:.6rem;
  margin-top:var(--space-3);
  color:var(--color-muted);
  font-size:.95rem;
}
.help img{width:18px; height:18px; opacity:.8;}

.notice{
  border-left:4px solid rgba(225,29,46,.45);
  background:rgba(225,29,46,.06);
  padding: var(--space-4);
  border-radius: 14px;
  color:var(--color-muted);
}
.notice strong{color:var(--color-text);}

/* ---------
   Cards
--------- */
.card{
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  overflow:hidden;
  background:#fff;
  box-shadow: var(--shadow-sm);
}
.card__media img{
  width:100%;
  height: 220px;
  object-fit:cover;
}
.card__body{
  padding:var(--space-5);
  display:flex;
  flex-direction:column;
  gap:var(--space-3);
}
.card__title{display:flex; align-items:flex-start; justify-content:space-between; gap:var(--space-3);}
.card__title h3{margin:0;}
.card__meta{display:flex; flex-wrap:wrap; gap:.5rem;}
.meta-chip{
  font-size:.85rem;
  font-weight:900;
  color:var(--color-text);
  background:rgba(15,23,42,.04);
  border:1px solid rgba(226,232,240,.9);
  border-radius:999px;
  padding:.25rem .6rem;
}
.price{
  font-weight:900;
  font-size:1.2rem;
  color:var(--color-text);
}
.price small{font-weight:700;}
.card__actions{display:flex; gap:var(--space-3); flex-wrap:wrap;}
.card__actions .btn{flex:1; min-width: 160px;}

.icon-list{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--space-3);
}
@media (min-width: 700px){
  .icon-list{grid-template-columns:repeat(2, 1fr);}
}
.icon-item{
  display:flex;
  gap:var(--space-3);
  align-items:flex-start;
}
.icon-item img{width:28px; height:28px; opacity:.9;}
.icon-item strong{display:block; color:var(--color-text); font-weight:900;}
.icon-item span{display:block; color:var(--color-muted);}

/* ---------
   Page header (internal)
--------- */
.page-hero{
  background: var(--color-bg-soft);
  border-bottom:1px solid rgba(226,232,240,.9);
}
.page-hero__inner{
  padding-block: var(--space-8);
}
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  align-items:center;
  color:var(--color-muted);
  font-weight:800;
  font-size:.92rem;
  margin-bottom:var(--space-3);
}
.breadcrumbs a{text-decoration:none; color:var(--color-muted);}
.breadcrumbs a:hover{color:var(--color-primary);}
.breadcrumbs .sep{opacity:.6;}

/* ---------
   FAQ accordion
--------- */
.accordion{
  display:flex;
  flex-direction:column;
  gap:var(--space-3);
}
.accordion__item{
  border:1px solid var(--color-border);
  border-radius:16px;
  overflow:hidden;
  background:#fff;
}
.accordion__btn{
  width:100%;
  text-align:left;
  padding: var(--space-4) var(--space-5);
  background:#fff;
  border:0;
  font-weight:900;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:var(--space-3);
  cursor:pointer;
}
.accordion__btn:hover{background:rgba(15,23,42,.02);}
.accordion__btn .chev{
  width:12px; height:12px;
  border-right:2px solid var(--color-muted);
  border-bottom:2px solid var(--color-muted);
  transform: rotate(45deg);
  transition: transform .15s ease;
}
.accordion__item[data-open="true"] .accordion__btn .chev{transform: rotate(-135deg);}
.accordion__panel{
  padding: 0 var(--space-5) var(--space-5);
  display:none;
}
.accordion__item[data-open="true"] .accordion__panel{display:block;}

/* ---------
   Sticky checkout bar (ticket pages)
--------- */
.sticky-buy{
  position:sticky;
  bottom:0;
  z-index:900;
  background:rgba(255,255,255,.95);
  border-top:1px solid rgba(226,232,240,.9);
  padding: var(--space-3) var(--space-5);
  display:flex;
  gap:var(--space-3);
  align-items:center;
  justify-content:space-between;
  backdrop-filter: blur(10px);
}
.sticky-buy .btn{min-width: 180px;}
@media (min-width: 900px){
  .sticky-buy{display:none;}
}

/* ---------
   Footer
--------- */
.footer{
  background:#0B1220;
  color:rgba(255,255,255,.86);
}
.footer a{color:rgba(255,255,255,.86); text-decoration:none;}
.footer a:hover{color:#fff; text-decoration:underline;}
.footer__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--space-7);
  padding-block: var(--space-9);
}
.footer__brand img{width:190px;}
.footer__cols{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--space-6);
}
.footer h3{color:#fff; font-size:1rem; letter-spacing:.02em;}
.footer ul{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:.6rem;}
.footer__bottom{
  border-top:1px solid rgba(148,163,184,.18);
  padding-block: var(--space-5);
  color:rgba(255,255,255,.65);
  font-size:.92rem;
}
@media (min-width: 900px){
  .footer__grid{grid-template-columns: 1.1fr 1.9fr;}
  .footer__cols{grid-template-columns: repeat(3, 1fr);}
}

/* ---------
   Tables (comparison)
--------- */
.table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  border:1px solid var(--color-border);
  border-radius: 16px;
  overflow:hidden;
  background:#fff;
}
.table th, .table td{
  padding: .9rem .9rem;
  border-bottom:1px solid var(--color-border);
  vertical-align:top;
  text-align:left;
}
.table th{background:rgba(15,23,42,.03); font-weight:900;}
.table tr:last-child td{border-bottom:0;}
.table .yes{color:var(--color-success); font-weight:900;}
.table .no{color:#94A3B8; font-weight:900;}
.table small{display:block;}

/* ---------
   Floating help (WhatsApp placeholder)
--------- */
.fab{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:2500;
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  padding:.85rem 1rem;
  background:#fff;
  border:1px solid var(--color-border);
  border-radius:999px;
  box-shadow: var(--shadow-md);
  text-decoration:none;
  font-weight:900;
}
.fab:hover{border-color:#CBD5E1;}