/* ============================================================
   LAYOUT – Cross-Device: iOS 14+, Android, Desktop
   ============================================================ */

/* ── App Shell ── */
#app {
  display: block; /* Kein Flex – Login-Screen braucht volle Kontrolle */
  min-height: 100vh;
  min-height: -webkit-fill-available;
  min-height: 100dvh;
  position: relative;
}

/* ══════════════════════════════════════════════════════════
   TOP NAVIGATION BAR
   ══════════════════════════════════════════════════════════ */
#top-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  /* Höhe = Nav + Safe Area (Dynamic Island / Notch) */
  height: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  background: var(--bg-nav);
  /* Blur mit Fallback */
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  /* Fallback wenn backdrop-filter nicht unterstützt */
  background-color: var(--bg-nav);
  border-bottom: 0.5px solid var(--border);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  /* Safe Area Padding mit Fallback */
  padding-left: calc(var(--sp-4) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--sp-4) + env(safe-area-inset-right, 0px));
  z-index: 200;
}

/* Fallback für Browser ohne backdrop-filter */
@supports not (backdrop-filter: blur(1px)) {
  #top-nav { background: var(--bg-surface); }
}

/* Nav-Brand-Icon */
.nav-brand-icon {
  width: 34px; height: 34px;
  background: -webkit-linear-gradient(315deg, #0A84FF, #003899);
  background: linear-gradient(145deg, #0A84FF, #003899);
  border-radius: var(--r-lg);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  font-size: 1rem;
  -webkit-box-shadow: 0 2px 10px rgba(10,132,255,.5);
  box-shadow: 0 2px 10px rgba(10,132,255,.5);
}

/* ── Hamburger ── */
#hamburger-btn {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--r-lg);
  -webkit-transition: background var(--t-fast);
  transition: background var(--t-fast);
  /* iOS: Mindest-Touch-Target 44x44pt */
  min-width: 44px;
  min-height: 44px;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
#hamburger-btn:hover  { background: var(--bg-card); }
#hamburger-btn:active { background: var(--border); }
#hamburger-btn span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary);
  border-radius: 9999px;
  -webkit-transition: all var(--t-normal);
  transition: all var(--t-normal);
}
#hamburger-btn.open span:nth-child(1) {
  -webkit-transform: translateY(7px) rotate(45deg);
  transform: translateY(7px) rotate(45deg);
}
#hamburger-btn.open span:nth-child(2) { opacity: 0; -webkit-transform: scaleX(0); transform: scaleX(0); }
#hamburger-btn.open span:nth-child(3) {
  -webkit-transform: translateY(-7px) rotate(-45deg);
  transform: translateY(-7px) rotate(-45deg);
}

/* ══════════════════════════════════════════════════════════
   SIDEBAR – von rechts, mit Safe Area
   ══════════════════════════════════════════════════════════ */
#sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 299;
  opacity: 0;
  pointer-events: none;
  -webkit-transition: opacity var(--t-normal);
  transition: opacity var(--t-normal);
}
#sidebar-overlay.visible { opacity: 1; pointer-events: all; }

#sidebar {
  position: fixed;
  top: 0; right: 0;
  /* Breite: max 320px oder 85% des Viewports */
  width: 320px;
  width: min(320px, 85vw);
  height: 100vh;
  height: -webkit-fill-available;
  height: 100dvh;
  background: var(--bg-sidebar);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-left: 0.5px solid var(--border);
  z-index: 300;
  -webkit-transform: translateX(100%);
  transform: translateX(100%);
  -webkit-transition: -webkit-transform var(--t-normal);
  transition: transform var(--t-normal);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  -webkit-box-shadow: var(--shadow-lg);
  box-shadow: var(--shadow-lg);
  /* Safe Areas */
  padding-top: env(safe-area-inset-top, 0px);
  padding-right: env(safe-area-inset-right, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
#sidebar.open {
  -webkit-transform: translateX(0);
  transform: translateX(0);
}

@supports not (backdrop-filter: blur(1px)) {
  #sidebar { background: var(--bg-surface); }
}

.sidebar-header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 0.5px solid var(--border);
  min-height: var(--nav-h);
  gap: var(--sp-3);
}
.sidebar-user {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: var(--sp-3);
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  min-width: 0;
}
.sidebar-user-info { min-width: 0; }
.sidebar-user-name {
  font-weight: var(--fw-semi);
  font-size: var(--text-base);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -.01em;
}
.sidebar-user-role {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 1px;
}

.sidebar-nav { -webkit-box-flex: 1; -ms-flex: 1; flex: 1; padding: var(--sp-2) 0; }

.sidebar-section-label {
  font-size: var(--text-xs);
  font-weight: var(--fw-semi);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: var(--sp-3) var(--sp-5) var(--sp-1);
}

.sidebar-item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: var(--sp-3);
  padding: .7rem var(--sp-5);
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: var(--fw-normal);
  cursor: pointer;
  -webkit-transition: background var(--t-fast);
  transition: background var(--t-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  position: relative;
  /* iOS: Mindest-Touch-Target */
  min-height: 44px;
}
.sidebar-item:hover  { background: var(--bg-card); }
.sidebar-item:active { background: var(--border); }
.sidebar-item.active {
  color: var(--accent);
  background: var(--accent-light);
  font-weight: var(--fw-semi);
}
.sidebar-item.active::before {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  border-radius: 9999px 0 0 9999px;
}
.sidebar-item-icon { font-size: 1.1rem; width: 22px; text-align: center; }

.sidebar-footer {
  padding: var(--sp-4) var(--sp-5);
  border-top: 0.5px solid var(--border);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: var(--sp-2);
}

/* ══════════════════════════════════════════════════════════
   MAIN CONTENT
   ══════════════════════════════════════════════════════════ */
#main-content {
  /* Abstand oben = Nav-Höhe + Safe Area */
  margin-top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
  padding: var(--sp-5) var(--sp-4);
  /* Abstand unten = Tab-Bar + Safe Area */
  padding-bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + var(--sp-5));
  padding-left: calc(var(--sp-4) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--sp-4) + env(safe-area-inset-right, 0px));
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  min-height: calc(100vh - var(--nav-h));
  /* Momentum-Scrolling */
  -webkit-overflow-scrolling: touch;
}

/* ══════════════════════════════════════════════════════════
   BOTTOM TAB BAR – iOS UITabBar
   ══════════════════════════════════════════════════════════ */
#bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  /* Höhe = Tab-Bar + Safe Area (Home Indicator) */
  height: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
  background: var(--bg-nav);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-top: 0.5px solid var(--border);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: flex-start;
  -ms-flex-align: flex-start;
  align-items: flex-start;
  -webkit-box-pack: space-around;
  -ms-flex-pack: space-around;
  justify-content: space-around;
  z-index: 200;
  padding-top: var(--sp-2);
}

@supports not (backdrop-filter: blur(1px)) {
  #bottom-nav { background: var(--bg-surface); }
}

.bottom-nav-item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 2px;
  padding: 0 var(--sp-3);
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: none;
  border-radius: var(--r-lg);
  -webkit-transition: color var(--t-fast);
  transition: color var(--t-fast);
  /* iOS: Mindest-Touch-Target 44x44pt */
  min-width: 44px;
  min-height: 44px;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.bottom-nav-item:active {
  opacity: .6;
  -webkit-transform: scale(.9);
  transform: scale(.9);
}
.bottom-nav-item.active { color: var(--accent); }
.bottom-nav-item .nav-icon  { font-size: 1.4rem; line-height: 1; }
.bottom-nav-item .nav-label {
  font-size: .625rem;
  font-weight: var(--fw-medium);
  letter-spacing: .01em;
  line-height: 1;
}

/* ══════════════════════════════════════════════════════════
   PAGE SECTIONS
   ══════════════════════════════════════════════════════════ */
.page-section { display: none; }
.page-section.active {
  display: block;
  -webkit-animation: fadeIn var(--t-normal) both;
  animation: fadeIn var(--t-normal) both;
}

/* ══════════════════════════════════════════════════════════
   INSTALL / UPDATE BANNERS
   ══════════════════════════════════════════════════════════ */
#install-banner {
  position: fixed;
  bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + var(--sp-3));
  left: var(--sp-4); right: var(--sp-4);
  background: var(--bg-card);
  border: 0.5px solid var(--border-strong);
  border-radius: var(--r-2xl);
  padding: var(--sp-4) var(--sp-5);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: var(--sp-3);
  -webkit-box-shadow: var(--shadow-lg);
  box-shadow: var(--shadow-lg);
  z-index: 500;
  -webkit-animation: slideInUp var(--t-normal) both;
  animation: slideInUp var(--t-normal) both;
}
#install-banner.hidden { display: none; }

#update-banner {
  position: fixed;
  top: calc(var(--nav-h) + env(safe-area-inset-top, 0px) + var(--sp-3));
  right: var(--sp-4);
  background: var(--accent);
  color: #fff;
  border-radius: var(--r-2xl);
  padding: .65rem 1.1rem;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: var(--sp-3);
  -webkit-box-shadow: var(--shadow-accent);
  box-shadow: var(--shadow-accent);
  z-index: 500;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  -webkit-animation: slideInRight var(--t-normal) both;
  animation: slideInRight var(--t-normal) both;
}
#update-banner.hidden { display: none; }

/* ══════════════════════════════════════════════════════════
   GRID LAYOUTS
   ══════════════════════════════════════════════════════════ */
.grid-2 { display: -ms-grid; display: grid; -ms-grid-columns: 1fr 1fr; grid-template-columns: repeat(2, 1fr); gap: var(--card-gap); }
.grid-3 { display: -ms-grid; display: grid; -ms-grid-columns: 1fr 1fr 1fr; grid-template-columns: repeat(3, 1fr); gap: var(--card-gap); }
.grid-4 { display: -ms-grid; display: grid; -ms-grid-columns: 1fr 1fr 1fr 1fr; grid-template-columns: repeat(4, 1fr); gap: var(--card-gap); }

/* ══════════════════════════════════════════════════════════
   DASHBOARD TILES
   ══════════════════════════════════════════════════════════ */
.tile-grid {
  display: -ms-grid;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--sp-3);
}
.tile {
  background: var(--bg-card);
  border-radius: var(--r-2xl);
  padding: var(--sp-5) var(--sp-3);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  gap: var(--sp-3);
  cursor: pointer;
  -webkit-transition: all var(--t-fast);
  transition: all var(--t-fast);
  text-align: center;
  min-height: 108px;
  -webkit-box-shadow: var(--shadow-sm);
  box-shadow: var(--shadow-sm);
  /* iOS: Touch-Target */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.tile:hover  {
  -webkit-transform: translateY(-3px) scale(1.02);
  transform: translateY(-3px) scale(1.02);
  -webkit-box-shadow: var(--shadow-md);
  box-shadow: var(--shadow-md);
}
.tile:active {
  -webkit-transform: scale(.94);
  transform: scale(.94);
}
.tile-icon {
  font-size: 2rem;
  width: 56px; height: 56px;
  background: var(--accent-light);
  border-radius: var(--r-xl);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.tile-label {
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  line-height: 1.3;
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ══════════════════════════════════════════════════════════ */

/* Kleine Smartphones (iPhone SE, 375px) */
@media (max-width: 390px) {
  :root {
    --text-base: .875rem;
    --sp-4: .875rem;
    --sp-5: 1.125rem;
    --sp-6: 1.25rem;
  }
  #main-content {
    padding: var(--sp-3) var(--sp-3);
    padding-bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + var(--sp-3));
  }
  .tile-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3    { grid-template-columns: repeat(2, 1fr); }
  .grid-4    { grid-template-columns: repeat(2, 1fr); }
}

/* Mittlere Smartphones (iPhone 14, 390-430px) */
@media (max-width: 480px) {
  .tile-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2    { grid-template-columns: 1fr; }
  .grid-4    { grid-template-columns: repeat(2, 1fr); }
}

/* Tablets & große Smartphones */
@media (max-width: 768px) {
  #main-content {
    padding: var(--sp-4) var(--sp-3);
    padding-bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + var(--sp-4));
    padding-left: calc(var(--sp-3) + env(safe-area-inset-left, 0px));
    padding-right: calc(var(--sp-3) + env(safe-area-inset-right, 0px));
  }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .tile-grid { grid-template-columns: repeat(3, 1fr); }
  .page-title { font-size: var(--text-2xl); }
}

/* Desktop */
@media (min-width: 1024px) {
  #bottom-nav { display: none; }
  #main-content {
    padding-bottom: var(--sp-8);
    margin-top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
  }
  .tile-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

/* ══════════════════════════════════════════════════════════
   PRINT
   ══════════════════════════════════════════════════════════ */
@media print {
  #top-nav, #sidebar, #sidebar-overlay, #bottom-nav,
  #toast-container, #install-banner, #update-banner { display: none !important; }
  #main-content { margin: 0; padding: 0; }
}