/* ==========================================================================
   layout.css — Globales Layout (Header, Nav, Main)
   Mobile-First, funktioniert ohne JavaScript.
   Token-only (keine Hex-Werte).
   ========================================================================== */

/* --------------------------------------------------------------------------
   Body als Grid-Container

   WICHTIG: base.css setzt vorher `body { padding: var(--space-md); }`. Wir
   überschreiben ALLE padding-Seiten hier explizit, weil ein nachgeladenes
   Stylesheet (z.B. style.css per User-Override) sonst auf den shorthand zurückfällt
   und unser padding-top: var(--app-header-h) plattmacht. Der Header wird fixed
   positioniert (siehe unten) und braucht den top-Offset zwingend, sonst rutscht
   der Inhalt unter den Header.
   -------------------------------------------------------------------------- */
/* Wurzel-Hintergrund themen: auf Geraeten mit Notch/Safe-Area scheint sonst
   der (weisse) html-Default oben/unten durch (viewport-fit=cover). */
html {
  background-color: var(--color-bg);
}

body {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "header"
    "nav"
    "main"
    "footer";
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  /* Header-Hoehe + Safe-Area (Notch/Statusleiste) als Ausgleich fuer den
     fixed Header. env(safe-area-inset-top) ist 0 auf Geraeten ohne Notch. */
  padding: calc(var(--app-header-h, 56px) + env(safe-area-inset-top, 0px)) 0 0 0;
  background-color: var(--color-bg);
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Skip-Link (Accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-md, 1rem);
  z-index: 200;
  padding: var(--space-sm, 0.75rem) var(--space-md, 1rem);
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: top 150ms ease;
}

.skip-link:focus-visible {
  top: var(--space-sm, 0.75rem);
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Header — sticky oben, immer horizontal mit space-between
   -------------------------------------------------------------------------- */
header.app-header {
  /* Fix oben, damit der Header beim Scrollen IMMER sichtbar bleibt.
     Body bekommt padding-top: var(--app-header-h) als Ausgleich.
     `!important` ist hier defensiv, weil eine generische `header { ... }`
     Regel aus base.css (oder ein leakender style.css-Import) sonst das Layout
     kaputt machen kann. */
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  z-index: 1000;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: var(--space-sm, 0.75rem);
  /* Safe-Area oben in den Header einrechnen: der farbige Header fuellt den
     Notch-/Statusleisten-Bereich, statt dort einen weissen Balken zu lassen. */
  padding: calc(var(--space-sm, 0.75rem) + env(safe-area-inset-top, 0px)) var(--space-md, 1rem) var(--space-sm, 0.75rem);
  padding-left: calc(var(--space-md, 1rem) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--space-md, 1rem) + env(safe-area-inset-right, 0px));
  margin: 0;
  height: calc(var(--app-header-h, 56px) + env(safe-area-inset-top, 0px));
  box-sizing: border-box;
  background-color: color-mix(in srgb, var(--color-surface) 94%, transparent);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

/* Logo links */
.app-logo,
.app-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs, 0.5rem);
  min-width: 0;
  flex: 1 1 auto;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 150ms ease;
}

.app-logo:hover,
.app-header__logo:hover {
  color: var(--color-primary);
}

.app-logo:focus-visible,
.app-header__logo:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.app-header__logo img,
.app-header__logo svg,
.app-logo img,
.app-logo svg {
  height: 1.5rem;
  width: auto;
  flex-shrink: 0;
}

/* Icon-Actions rechts (Suche, Settings) */
.app-header-actions {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-2xs, 0.25rem);
  flex-shrink: 0;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background-color: transparent;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.icon-button svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.icon-button:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text);
}

.icon-button:active {
  background-color: var(--color-surface-active);
}

.icon-button:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Nav — eigenes Grid-Feld unter dem Header
   -------------------------------------------------------------------------- */
nav.app-nav {
  grid-area: nav;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs, 0.25rem);
  padding: var(--space-xs, 0.5rem) var(--space-md, 1rem);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

nav.app-nav::-webkit-scrollbar { height: 4px; }
nav.app-nav::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Nav-Buttons (Default = Desktop/Tablet, Pill-Style)
   -------------------------------------------------------------------------- */
.app-nav__btn {
  position: relative;
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs, 0.375rem);
  padding: var(--space-2xs, 0.4rem) var(--space-md, 0.95rem);
  min-height: 38px;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease, transform 120ms ease;
}

.app-nav__btn:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text);
}

.app-nav__btn:active {
  background-color: var(--color-surface-active);
  transform: scale(0.96);
}

.app-nav__btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  color: var(--color-text);
}

.app-nav__btn--active,
.app-nav__btn.is-active {
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.app-nav__btn--active:hover,
.app-nav__btn.is-active:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-primary-contrast);
  border-color: var(--color-primary-hover);
}

.app-nav__btn--active:focus-visible {
  outline-color: var(--color-focus);
  color: var(--color-primary-contrast);
}

.app-nav__btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  line-height: 1;
}

.app-nav__btn__icon svg {
  width: 100%;
  height: 100%;
}

.app-nav__btn__label {
  display: inline;
  line-height: 1.2;
}

/* Burger (im HTML nicht vorhanden — als Reserve verstecken) */
.app-nav__burger { display: none; }

/* --------------------------------------------------------------------------
   Main — Content Area
   -------------------------------------------------------------------------- */
main#app {
  grid-area: main;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-lg, 1.5rem);
  box-sizing: border-box;
}

main#app:focus-visible {
  outline: none;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
footer.app-footer {
  grid-area: footer;
  padding: var(--space-md, 1rem) var(--space-lg, 1.5rem);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

/* ==========================================================================
   Mobile (<= 767px) — Bottom-Tab-Bar
   - Header bleibt horizontal mit space-between
   - Primary-Routen als 5er-Tab-Bar unten
   - Sekundär-Routen versteckt (nicht in HTML, daher kein Burger nötig)
   ========================================================================== */
@media (max-width: 767px) {
  body {
    grid-template-rows: auto 1fr auto;
    grid-template-areas:
      "header"
      "main"
      "footer";
    padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
  }

  header.app-header {
    padding: var(--space-xs, 0.5rem) var(--space-sm, 0.75rem);
    gap: var(--space-2xs, 0.375rem);
  }

  .app-logo,
  .app-header__logo {
    font-size: 0.9375rem;
  }

  .icon-button {
    width: 38px;
    height: 38px;
  }

  .icon-button svg {
    width: 20px;
    height: 20px;
  }

  /* Nav wird zur fixed Bottom-Tab-Bar */
  nav.app-nav {
    grid-area: unset;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    z-index: 99;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-around;
    align-items: stretch;
    gap: 0;
    padding: 0.25rem 0.25rem;
    padding-bottom: calc(0.25rem + env(safe-area-inset-bottom, 0px));
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: none;
    box-shadow: 0 -1px 8px var(--color-hover);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    overflow-x: hidden;
    overflow-y: hidden;
  }

  /* Sekundär-Routen auf Mobile ausblenden, nur primary anzeigen */
  nav.app-nav .app-nav__btn:not(.app-nav__btn--primary) {
    display: none;
  }

  /* Tab-Style: Icon oben, Label drunter */
  nav.app-nav .app-nav__btn {
    flex: 1 1 0;
    min-width: 0;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    padding: 0.375rem 0.25rem;
    min-height: 56px;
    border-radius: 10px;
    font-size: 0.6875rem;
    font-weight: 500;
    background-color: transparent;
    border-color: transparent;
    color: var(--color-text-muted);
    box-shadow: none;
  }

  nav.app-nav .app-nav__btn:hover {
    background-color: var(--color-surface-hover);
    color: var(--color-text);
  }

  nav.app-nav .app-nav__btn__icon {
    width: 1.5rem;
    height: 1.5rem;
  }

  nav.app-nav .app-nav__btn__label {
    font-size: 0.6875rem;
    line-height: 1.1;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Active: kein Pill-Fill, sondern primary-Farbe + Top-Indicator */
  nav.app-nav .app-nav__btn--active,
  nav.app-nav .app-nav__btn.is-active {
    background-color: transparent;
    border-color: transparent;
    color: var(--color-primary);
    box-shadow: none;
  }

  nav.app-nav .app-nav__btn--active:hover,
  nav.app-nav .app-nav__btn.is-active:hover {
    background-color: var(--color-surface-hover);
    color: var(--color-primary);
    border-color: transparent;
  }

  nav.app-nav .app-nav__btn--active::before,
  nav.app-nav .app-nav__btn.is-active::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 25%;
    right: 25%;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 999px;
  }

  main#app {
    padding: var(--space-md, 1rem);
    padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px));
  }
}

/* ==========================================================================
   Tablet (768px – 1023px) — horizontale Top-Nav, kompakter
   ========================================================================== */
@media (min-width: 768px) and (max-width: 1023px) {
  nav.app-nav {
    padding: var(--space-2xs, 0.375rem) var(--space-md, 1rem);
    gap: var(--space-2xs, 0.25rem);
  }

  .app-nav__btn {
    padding: var(--space-2xs, 0.375rem) var(--space-sm, 0.75rem);
    font-size: 0.8125rem;
    min-height: 36px;
  }

  .app-nav__btn__label {
    /* Label kürzen bei sehr engen Tablets ist optional — hier sichtbar lassen */
  }
}

/* ==========================================================================
   Desktop (>= 1024px) — alle Routen sichtbar, großzügigere Pills
   ========================================================================== */
@media (min-width: 1024px) {
  header.app-header {
    padding: var(--space-sm, 0.75rem) var(--space-xl, 2rem);
  }

  .app-logo,
  .app-header__logo {
    font-size: 1.125rem;
    flex: 0 0 auto;
  }

  nav.app-nav {
    padding: var(--space-xs, 0.5rem) var(--space-xl, 2rem);
    gap: var(--space-2xs, 0.375rem);
    overflow-x: visible;
  }

  .app-nav__btn {
    padding: var(--space-2xs, 0.5rem) var(--space-md, 1rem);
    font-size: 0.9375rem;
    min-height: 40px;
  }
}

/* ==========================================================================
   Reduced-Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  nav.app-nav { scroll-behavior: auto; }
  .app-nav__btn,
  .icon-button,
  .app-logo,
  .app-header__logo,
  .skip-link {
    transition: none;
  }
  .app-nav__btn:active {
    transform: none;
  }
}