/* ========================================
   GLOBAL TAB BAR - Navegació entre pàgines
   Estil iOS + Glassmorphism
   ======================================== */

.global-tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 900;
  padding: 0 var(--spacing-md);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

/* ===== GLASSMORPHISM ===== */
.global-tab-bar.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border-top: var(--glass-border-top);
  box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
  .global-tab-bar.glass {
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.3);
  }
}

@supports not (backdrop-filter: blur(1px)) {
  .global-tab-bar.glass {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
  }
}

/* ===== TAB ITEM ===== */
.global-tab-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
  max-width: 120px;
  min-height: 44px;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 8px;
  text-decoration: none;
  font-family: inherit;
  font-size: inherit;
}

.global-tab-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  text-decoration: none;
}

.global-tab-item.active {
  color: var(--color-primary);
}

/* Icones */
.global-tab-item .material-symbols-outlined {
  font-size: 24px;
  font-weight: 400;
  transition: all 0.15s ease-out;
}

.global-tab-item.active .material-symbols-outlined {
  font-weight: 600;
  transform: scale(1.1);
}

/* Labels */
.global-tab-item .tab-label {
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 80px;
}

/* ===== TAB BADGE ===== */
.tab-badge {
  position: absolute;
  top: 2px;
  left: calc(50% + 4px);
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--color-danger);
  color: white;
  font-size: 10px;
  font-weight: 600;
  border-radius: 8px;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 1;
}

.tab-badge.visible {
  display: flex;
}

/* ===== TABBAR SHEET OVERLAY ===== */
.tabbar-sheet-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 10050;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.tabbar-sheet-overlay.open {
  display: block;
  opacity: 1;
}

@media (prefers-color-scheme: dark) {
  .tabbar-sheet-overlay.open {
    background: rgba(0, 0, 0, 0.6);
  }
}

/* ===== TABBAR SHEET ===== */
.tabbar-sheet {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10055;
  background: var(--color-bg-card);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

@media (prefers-color-scheme: dark) {
  .tabbar-sheet {
    background: var(--color-bg-elevated);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.4);
  }
}

.tabbar-sheet.open {
  transform: translateY(0);
}

.tabbar-sheet-handle {
  width: 36px;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  margin: var(--spacing-sm) auto var(--spacing-xs);
}

.tabbar-sheet-content {
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-lg);
}

.tabbar-sheet-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: background 0.15s ease;
  font-size: var(--font-size-base);
  font-weight: 500;
}

.tabbar-sheet-item:hover {
  background: var(--color-bg-hover);
  text-decoration: none;
}

.tabbar-sheet-item.active {
  color: var(--color-primary);
  background: rgba(19, 117, 188, 0.08);
}

@media (prefers-color-scheme: dark) {
  .tabbar-sheet-item.active {
    background: rgba(10, 132, 255, 0.12);
  }
}

.tabbar-sheet-item .material-symbols-outlined {
  font-size: 24px;
}

.tabbar-sheet-item.active .material-symbols-outlined {
  font-weight: 600;
}

/* ===== PADDING BOTTOM per contingut ===== */
/* Pàgines on el tabbar global és visible necessiten padding
   perquè el contingut no quedi tapat */
[data-page="index"] .dashboard-container,
[data-page="calendario"] .calendario-container,
[data-page="horarios"] .main-container,
[data-page="historial"] .historial-container,
[data-page="gestio-academica"] .ga-container,
[data-page="incidencies"] .incidencies-container,
[data-page="inventario"] .main-content,
[data-page="cites"] .cites-main {
  padding-bottom: 80px;
}

/* ========================================
   RESPONSIVE
   ======================================== */

/* Mòbil */
@media (max-width: 768px) {
  .global-tab-bar {
    height: 56px;
    padding: 0;
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  .global-tab-item .tab-label {
    font-size: 10px;
  }

  .global-tab-item .material-symbols-outlined {
    font-size: 22px;
  }

  [data-page="index"] .dashboard-container,
  [data-page="calendario"] .calendario-container,
  [data-page="recursos"] .container,
  [data-page="horarios"] .main-container,
  [data-page="historial"] .container,
  [data-page="gestio-academica"] .ga-container,
  [data-page="incidencies"] .incidencies-container,
  [data-page="inventario"] .main-content {
    padding-bottom: 72px;
  }
}

/* Tablet */
@media (min-width: 768px) and (max-width: 1023px) {
  .global-tab-bar {
    height: 60px;
  }
}

/* Desktop: amagar tabbar global + bottom sheet */
@media (min-width: 1024px) {
  .global-tab-bar {
    display: none;
  }

  .tabbar-sheet-overlay,
  .tabbar-sheet {
    display: none !important;
  }

  [data-page="index"] .dashboard-container,
  [data-page="calendario"] .calendario-container,
  [data-page="recursos"] .container,
  [data-page="horarios"] .main-container,
  [data-page="historial"] .container,
  [data-page="gestio-academica"] .ga-container,
  [data-page="incidencies"] .incidencies-container,
  [data-page="inventario"] .main-content {
    padding-bottom: 0;
  }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .tabbar-sheet,
  .tabbar-sheet-overlay {
    transition: none !important;
  }
}