*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100dvh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  padding-top: max(12px, env(safe-area-inset-top));
  background: var(--color-bg);
  z-index: 100;
  min-height: var(--header-height);
}

.app-title {
  font-size: var(--font-size-title);
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Content */
.app-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  padding: 0 16px 16px;
  position: relative;
}

/* Tab Bar */
.tab-bar {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: var(--color-card);
  border-top: 0.5px solid var(--color-separator);
  padding-bottom: var(--safe-bottom);
  min-height: var(--tabbar-height);
  z-index: 100;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 12px;
  border: none;
  background: none;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  font-family: var(--font-family);
  cursor: pointer;
  transition: color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

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

.tab-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Responsive: Tablet */
@media (min-width: 600px) {
  .app-content {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 24px 24px;
  }

  .app-header {
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
  }
}

/* Responsive: Desktop/Tablet - Sidebar */
@media (min-width: 768px) {
  #app {
    flex-direction: row;
  }

  .app-header {
    display: none;
  }

  .tab-bar {
    order: -1;
    flex-direction: column;
    justify-content: flex-start;
    width: 220px;
    min-height: 100dvh;
    border-top: none;
    border-right: 0.5px solid var(--color-separator);
    padding: 24px 8px;
    gap: 4px;
  }

  .tab-bar::before {
    content: 'Putzplan';
    display: block;
    font-size: var(--font-size-title);
    font-weight: 700;
    padding: 8px 16px 24px;
    color: var(--color-text);
    width: 100%;
  }

  .tab-item {
    flex-direction: row;
    justify-content: flex-start;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    width: 100%;
    font-size: var(--font-size-lg);
  }

  .tab-item.active {
    background: rgba(0, 122, 255, 0.1);
  }

  .tab-icon {
    width: 22px;
    height: 22px;
  }

  .app-content {
    flex: 1;
    max-width: 700px;
    padding: 32px 40px;
  }

  /* Show title in content area on desktop */
  .app-content::before {
    content: attr(data-title);
    display: block;
    font-size: var(--font-size-title);
    font-weight: 700;
    margin-bottom: 16px;
  }
}

/* Offline indicator */
.offline-indicator {
  display: none;
  position: fixed;
  top: max(8px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-warning);
  color: white;
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  z-index: 1000;
}

.offline-indicator.visible {
  display: block;
}