/* =========================================================
   SLBahnen – Allgemeiner Style (Basis)
   Datei: css/style.css
   Zweck:
   - Globale Variablen + Reset + Typografie
   - Layout-Container (.wrap)
   - Sticky Header + Sticky Topbar (Navigation)
   - Nav-Panel (ausklappbar)
   - Footer
   - Basis-Utilities (optional, sparsam)

   WICHTIG:
   - KEINE Page-spezifischen Styles hier (Home/Produkte/About/etc.)
   - Keine "Insel"-Karten-Designs hier – nur Foundation
========================================================= */

/* ---------- Design Tokens ---------- */
:root{
  --wrap:1100px;
  --px:40px;
  --px-m:30px;

  --radius:12px;

  --font-big:clamp(2rem, 1.4vw + 1.5rem, 3rem);
  --font-medium:20px;

  /* Sticky heights (werden optional via JS gemessen und gesetzt) */
  --header-h: 0px;
  --topbar-h: 0px;
  --nav-offset: 0px; /* = header + topbar */

  /* SLBahnen Farben */
  --blue-dark:#2c3e50;
  --blue:#3498db;
  --violett:#8e44ad;
  --red:#d10a0a;

  --blue-hover:#2c3e50;
  --violett-hover:#692a85;
  --red-hover:#990505;

  --blue-sbb:#2d327d;

  /* Text/Surface */
  --text:#333;
  --bg:#f0efef;

  /* UI neutrals */
  --shadow-sm: 0 4px 14px rgba(0,0,0,.10);
  --shadow-md: 0 8px 24px rgba(0,0,0,.12);

  --border: rgba(0,0,0,.10);
}

/* ---------- Reset / Base ---------- */
*{ box-sizing:border-box; }
html,body{ height:100%; }

html{
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-offset, 0px);
}

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Lexend', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  display:flex;
  flex-direction:column;
}

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

/* ---------- Container ---------- */
.wrap{
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--px);
}

@media (max-width: 768px){
  .wrap{ padding-inline: var(--px-m); }
}

/* Optional: main standard flow */
main{ flex: 1 0 auto; }

/* ---------- Sticky Header + Topbar ---------- */
/* header bleibt oben sticky */
header{
  background: var(--blue-dark);
  color:#fff;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner{
  display:flex;
  align-items:center;
  gap:14px;
  padding: 12px 0;
}

.logo{
  width:auto;
  height: clamp(4rem, 3vw + 2rem, 7rem);
}

.brand{
  font-weight: 600;
  font-size: var(--font-big);
}

/* topbar (Navigation/Language) sticky direkt unter Header */
.topbar{
  background: var(--blue);
  color:#fff;
  position: sticky;
  top: var(--header-h);
  z-index: 999;
}

.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding: 10px 0;
}

.menu-btn{
  display:flex;
  align-items:center;
  gap:10px;

  background: transparent;
  color:#fff;
  border: 0;
  padding: 0;
  cursor: pointer;

  font-weight: 700;
  font-family: 'Lexend', system-ui, sans-serif;
}

.hamb{ width:24px; height:24px; }

.lang-right{
  display:flex;
  gap:10px;
  align-items:center;
}

.lang{
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.35);
  color:#fff;
  text-decoration:none;
}

.lang--off{
  text-decoration: line-through;
  opacity: .7;
  cursor: not-allowed;
}

/* ---------- Nav Panel (ausklappbar) ---------- */
.nav-panel{
  position: fixed;
  left: 0; right: 0;
  top: var(--nav-offset);
  background: var(--blue);
  color:#fff;
  z-index: 1500;

  max-height: calc(100vh - var(--nav-offset));
  overflow: auto;

  clip-path: inset(0 0 100% 0);
  opacity: 0;
  transition: clip-path .35s cubic-bezier(.22,.61,.36,1),
              opacity .2s ease;
  will-change: clip-path;

  margin:0;
  padding:0;
}

.nav-panel.is-open{
  clip-path: inset(0 0 0 0);
  opacity: 1;
}

.panel-inner{ padding: 12px 16px; }

.nav-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.nav-link{
  display:flex;
  align-items:center;
  gap:10px;

  padding: 12px 0;
  text-decoration:none;
  color:#fff;

  font-weight: 800;
  letter-spacing: .2px;

  transition: transform .3s ease, color .3s ease;
}

.nav-link .arr{
  opacity: .9;
  transition: transform .5s ease;
}

.nav-link:hover{
  transform: translateX(15px);
  color: #f8f8f8;
}

.nav-link:hover .arr{
  transform: translateX(6px);
}

.nav-link:focus-visible{
  outline: 2px solid #fff;
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- Footer ---------- */
footer{
  background: var(--blue-dark);
  color:#fff;
}

.footer-inner{
  padding: 14px 0;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  align-items:center;
}

.footer-links{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

.footer-links a{
  color:#fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Kleine, neutrale Utilities (sparsam) ---------- */
.u-muted{ color: rgba(0,0,0,.65); }
.u-sr-only{
  position:absolute !important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}

/* ---------- Backbar (neutral, kann überall genutzt werden) ---------- */
.backbar{ padding: 16px 0; }
.backlink{
  color: var(--blue-sbb);
  text-decoration:none;
  font-weight: 700;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.backlink:hover{ border-color: currentColor; }