/* Gray Line Argentina – Portal de Experiencias
   Mobile-first, performance friendly, no external dependencies.
*/

:root{
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #0b1220;
  --muted: #4b5563;
  --border: #e5e7eb;
  --primary: #0b3a6a; /* brand-inspired navy */
  --primary-700: #072e55;
  --accent: #e11d48; /* red accent */
  --success: #0f766e;
  --shadow: 0 10px 30px rgba(2, 8, 23, .08);
  --radius: 16px;
  --radius-sm: 12px;
  --container: 1120px;

  --step--1: clamp(.88rem, .82rem + .2vw, .95rem);
  --step-0: clamp(1rem, .95rem + .3vw, 1.1rem);
  --step-1: clamp(1.15rem, 1.05rem + .55vw, 1.35rem);
  --step-2: clamp(1.35rem, 1.2rem + 1.1vw, 1.9rem);
  --step-3: clamp(1.7rem, 1.4rem + 2vw, 2.5rem);
  --step-4: clamp(2rem, 1.65rem + 3vw, 3.2rem);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

img{ max-width:100%; height:auto; display:block; }
a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }
p{ margin: 0 0 1rem; }
ul{ margin:0; padding-left: 1.1rem; }
small{ font-size: var(--step--1); color: var(--muted); }

.container{
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.skip-link{
  position:absolute;
  left:-999px;
  top: auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip-link:focus{
  left: 1rem;
  top: 1rem;
  width:auto;
  height:auto;
  padding:.75rem 1rem;
  background: var(--surface);
  border: 2px solid var(--primary);
  border-radius: 999px;
  z-index: 9999;
}

/* Header */
.header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: .75rem;
  padding: .75rem 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:.65rem;
  min-width: 160px;
}
.brand img{ width: 132px; height:auto; }
.nav{
  display:flex;
  align-items:center;
  gap: 1rem;
}
.nav a{
  padding: .55rem .6rem;
  border-radius: 999px;
  color: var(--text);
  font-weight: 600;
  font-size: .95rem;
}
.nav a[aria-current="page"]{
  background: rgba(11,58,106,.08);
  color: var(--primary);
}
.nav a:hover{
  background: rgba(11,58,106,.08);
  text-decoration: none;
}
.header__right{
  display:flex;
  align-items:center;
  gap:.75rem;
}
.lang{
  display:flex;
  gap: .35rem;
  align-items:center;
  padding: .35rem .45rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
}
.lang a{
  font-size: .9rem;
  font-weight: 700;
  padding: .35rem .55rem;
  border-radius: 999px;
}
.lang a.active{
  background: var(--primary);
  color: #fff;
}
.menu-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  cursor:pointer;
}
.menu-btn svg{ width: 22px; height: 22px; }

@media (max-width: 920px){
  .nav{
    position: fixed;
    inset: 70px 1rem auto 1rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: .75rem;
    box-shadow: var(--shadow);
    display:none;
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
  }
  .nav.open{ display:flex; }
  .nav a{ border-radius: 12px; }
}
@media (min-width: 921px){
  .menu-btn{ display:none; }
}

/* Buttons & inputs */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding: .85rem 1.05rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  cursor:pointer;
  text-decoration:none;
  white-space: nowrap;
}
.btn-primary{
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover{ background: var(--primary-700); text-decoration:none; }
.btn-outline{
  background: transparent;
  border-color: rgba(11,58,106,.25);
  color: var(--primary);
}
.btn-outline:hover{
  background: rgba(11,58,106,.08);
  text-decoration:none;
}
.btn-accent{
  background: var(--accent);
  color:#fff;
}
.btn-accent:hover{ filter: brightness(.95); text-decoration:none; }

.input, select, textarea{
  width: 100%;
  padding: .85rem .9rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  font: inherit;
  background: #fff;
}
label{ font-weight: 700; font-size: .95rem; }
.form-row{
  display:grid;
  gap: .75rem;
}
@media (min-width: 760px){
  .form-row.cols-3{ grid-template-columns: 1.2fr 1fr 1fr; }
  .form-row.cols-2{ grid-template-columns: 1fr 1fr; }
}

/* Hero */
.hero{
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: #0b1220;
  color: #fff;
}
.hero__bg{
  position:absolute;
  inset:0;
  background-size: cover;
  background-position: center;
  opacity: .65;
  transform: scale(1.02);
}
.hero__overlay{
  position:absolute;
  inset:0;
  background: radial-gradient(70% 90% at 20% 10%, rgba(225,29,72,.25), rgba(11,58,106,.25) 45%, rgba(0,0,0,.55) 100%);
}
.hero__inner{
  position: relative;
  padding: 3.25rem 0 2rem;
}
.hero h1{
  font-size: var(--step-4);
  line-height: 1.05;
  margin: 0 0 .75rem;
}
.hero p{
  max-width: 58ch;
  color: rgba(255,255,255,.9);
}
.hero__cta{
  display:flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.25rem;
}
.hero__card{
  margin-top: 1.5rem;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius);
  padding: 1rem;
}
.hero__card h2{
  font-size: var(--step-1);
  margin: 0 0 .75rem;
}
.hero__card small{ color: rgba(255,255,255,.85); }
.hero__form{
  display:grid;
  gap: .75rem;
}
@media (min-width: 900px){
  .hero__inner{
    display:grid;
    grid-template-columns: 1.2fr .9fr;
    align-items: start;
    gap: 2rem;
    padding: 4.25rem 0 3rem;
  }
  .hero__card{ margin-top: 0; }
}

/* Sections */
.section{
  padding: 2.5rem 0;
}
.section h2{
  font-size: var(--step-2);
  margin: 0 0 .75rem;
}
.section__kicker{
  display:flex;
  align-items:center;
  gap:.5rem;
  color: var(--primary);
  font-weight: 800;
  font-size: .95rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.section__sub{
  color: var(--muted);
  max-width: 70ch;
  margin-bottom: 1.25rem;
}

.grid{
  display:grid;
  gap: 1rem;
}
.grid.cols-2{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4{ grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 920px){
  .grid.cols-4{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px){
  .grid.cols-3, .grid.cols-2, .grid.cols-4{ grid-template-columns: 1fr; }
}

/* Cards */
.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow:hidden;
  box-shadow: 0 6px 24px rgba(2, 8, 23, .04);
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover{
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(2, 8, 23, .10);
}
.card__img{
  aspect-ratio: 16/10;
  object-fit: cover;
}
.card__body{
  padding: 1rem;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding: .35rem .55rem;
  border-radius: 999px;
  font-weight: 800;
  font-size: .8rem;
  background: rgba(11,58,106,.08);
  color: var(--primary);
}
.price{
  font-weight: 900;
  font-size: 1.1rem;
  margin-top: .35rem;
}
.meta{
  display:flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  color: var(--muted);
  font-size: .92rem;
}
.meta span{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
}

/* Feature strip */
.features{
  background: #f8fafc;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.feature{
  display:flex;
  align-items:flex-start;
  gap:.75rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:#fff;
}
.feature img{ width: 34px; height: 34px; }
.feature strong{ display:block; }
.feature p{ margin: .2rem 0 0; color: var(--muted); font-size: .95rem; }

/* Content blocks */
.split{
  display:grid;
  gap: 1.25rem;
  align-items: center;
}
@media (min-width: 900px){
  .split{ grid-template-columns: 1.15fr .85fr; }
}
.panel{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: #fff;
}
.panel h3{ margin: 0 0 .5rem; }
.callout{
  background: linear-gradient(135deg, rgba(11,58,106,.10), rgba(225,29,72,.08));
  border: 1px solid rgba(11,58,106,.18);
  border-radius: var(--radius);
  padding: 1rem;
}

/* FAQ */
.faq details{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: .85rem 1rem;
  background: #fff;
}
.faq details + details{ margin-top: .65rem; }
.faq summary{
  cursor:pointer;
  font-weight: 800;
}
.faq summary::-webkit-details-marker{ display:none; }

/* Footer */
.footer{
  background: #0b1220;
  color: rgba(255,255,255,.9);
  padding: 2.25rem 0;
  margin-top: 2rem;
}
.footer a{ color: rgba(255,255,255,.9); }
.footer a:hover{ color:#fff; }
.footer__grid{
  display:grid;
  gap: 1.5rem;
}
@media (min-width: 900px){
  .footer__grid{ grid-template-columns: 1.3fr 1fr 1fr 1fr; }
}
.footer__brand img{ width: 150px; }
.footer__muted{ color: rgba(255,255,255,.7); }
.footer__bottom{
  border-top: 1px solid rgba(255,255,255,.12);
  margin-top: 1.5rem;
  padding-top: 1rem;
  display:flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: .92rem;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding: .35rem .55rem;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  color: rgba(255,255,255,.85);
}

/* Utilities */
.mt-1{ margin-top: .5rem; }
.mt-2{ margin-top: 1rem; }
.mt-3{ margin-top: 1.5rem; }
.mb-0{ margin-bottom: 0; }

.visually-hidden{
  position:absolute !important;
  height:1px; width:1px;
  overflow:hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

/* =========================
   Blog + Tour templates
   ========================= */

/* Breadcrumbs */
.breadcrumbs{
  color: var(--muted);
  font-size: .92rem;
}
.breadcrumbs ol{
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}
.breadcrumbs li{ display: inline-flex; align-items: center; }
.breadcrumbs li::after{
  content: "/";
  margin: 0 .35rem;
  color: #9ca3af;
}
.breadcrumbs li:last-child::after{ content: ""; }
.breadcrumbs a{ color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover{ text-decoration: underline; }

/* Prose (blog posts + long-form pages) */
.prose{ max-width: 78ch; }
.prose .lead{ font-size: var(--step-1); color: var(--muted); }
.prose h2{ margin: 2rem 0 .75rem; scroll-margin-top: 6rem; }
.prose h3{ margin: 1.5rem 0 .5rem; scroll-margin-top: 6rem; }
.prose p{ margin: 0 0 1rem; }
.prose a{ color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover{ text-decoration-thickness: 2px; }
.prose figure{ margin: 1.5rem 0; }
.prose figcaption{ font-size: .9rem; color: var(--muted); margin-top: .5rem; }
.prose blockquote{
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--primary);
  background: #f8fafc;
  border-radius: 12px;
}
.prose table{ width: 100%; border-collapse: collapse; margin: 1rem 0; }
.prose th, .prose td{ border: 1px solid var(--border); padding: .65rem .75rem; text-align: left; }
.prose th{ background: #f8fafc; }

/* TOC */
.toc{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: #fff;
}
.toc h2{ margin: 0 0 .6rem; font-size: 1rem; }
.toc ul{ margin: 0; padding-left: 1.1rem; }
.toc a{ color: var(--primary); text-decoration: none; }
.toc a:hover{ text-decoration: underline; }

/* Two-column layout for tour/article pages */
.page-grid{
  display: grid;
  gap: 1.25rem;
  align-items: start;
}
@media (min-width: 980px){
  .page-grid{ grid-template-columns: 1.55fr .75fr; }
}

.sticky{ position: sticky; top: 5.5rem; }

/* Booking card */
.booking-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: #fff;
  box-shadow: var(--shadow);
}
.booking-card .price{ font-size: 1.6rem; }
.booking-card .btn{ width: 100%; justify-content: center; }

/* Timeline */
.timeline{
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--border);
}
.timeline li{
  padding: .2rem 0 .2rem 1rem;
  position: relative;
  margin: .9rem 0;
}
.timeline li::before{
  content: "";
  position: absolute;
  left: -7px;
  top: .4rem;
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 999px;
}
.timeline strong{ display: block; }

.tag{
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .25rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  font-weight: 800;
  font-size: .84rem;
  color: var(--muted);
}

.article-meta{
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  color: var(--muted);
  font-size: .92rem;
}