/* ── App Shell ───────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
  background: var(--color-bg);
}

@media (min-width: 768px) {
  #app {
    max-width: 100%;
    flex-direction: row;
    align-items: stretch;
  }
}

/* ── Auth Screen ─────────────────────────────────────────────────── */
#auth-screen {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  max-width: 400px;
  margin: 0 auto;
  text-align: center;
}

.auth-logo {
  font-size: 3.5rem;
  margin-bottom: 16px;
  line-height: 1;
}

.auth-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  margin-bottom: 36px;
  line-height: 1.5;
}

.auth-card {
  width: 100%;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

/* ── Main Layout ─────────────────────────────────────────────────── */
#main-layout { display: flex; flex-direction: column; flex: 1; min-width: 0; }

/* ── View Header ─────────────────────────────────────────────────── */
.view-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 14px 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
}

.view-header__title { font-size: 1.25rem; font-weight: 800; }
.view-header__sub {
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  margin-top: 1px;
}

/* ── Page Content ────────────────────────────────────────────────── */
.page-content {
  flex: 1;
  padding: 16px;
  padding-bottom: calc(var(--nav-height) + var(--safe-bottom) + 16px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

@media (min-width: 768px) {
  .page-content {
    padding: 24px 32px;
    padding-bottom: 32px;
    max-width: 900px;
  }
}

/* ── Bottom Navigation ───────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  height: calc(var(--nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: stretch;
  z-index: 200;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
}

.bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 8px 4px;
  -webkit-tap-highlight-color: transparent;
  transition: color var(--transition), background var(--transition);
  color: var(--color-text-hint);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bottom-nav__item:hover { color: var(--color-primary); }

.bottom-nav__item.active {
  color: var(--color-primary);
}

.bottom-nav__icon {
  font-size: 1.375rem;
  line-height: 1;
  transition: transform var(--transition);
}

.bottom-nav__item.active .bottom-nav__icon {
  transform: scale(1.15);
}

/* ── Desktop: Sidebar Nav ────────────────────────────────────────── */
@media (min-width: 768px) {
  :root { --sidebar-width: 220px; }

  .bottom-nav {
    position: sticky;
    top: 0;
    left: 0;
    transform: none;
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    height: 100dvh;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 0;
    border-top: none;
    border-right: 1px solid var(--color-border);
    box-shadow: 2px 0 12px rgba(0,0,0,0.04);
    overflow: hidden;
  }

  /* Logo area at top of sidebar */
  .bottom-nav::before {
    content: '🥗 MealPlan';
    display: flex;
    align-items: center;
    padding: 24px 20px 20px;
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--color-primary);
    border-bottom: 1px solid var(--color-border);
    letter-spacing: -0.02em;
    flex-shrink: 0;
  }

  .bottom-nav__item {
    flex: unset;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 13px 20px;
    font-size: 0.875rem;
    letter-spacing: 0;
    text-transform: none;
    border-radius: 0;
    margin: 2px 8px;
    border-radius: var(--radius-md);
  }

  .bottom-nav__item:hover {
    background: var(--color-bg);
    color: var(--color-primary);
  }

  .bottom-nav__item.active {
    background: var(--color-primary-pale);
    color: var(--color-primary);
  }

  .bottom-nav__item.active .bottom-nav__icon {
    transform: none;
  }

  .bottom-nav__icon {
    font-size: 1.25rem;
    flex-shrink: 0;
  }
}

/* ── View Container ──────────────────────────────────────────────── */
.view {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.view.active { display: flex; }

/* ── Today View ──────────────────────────────────────────────────── */
.today-header {
  background: linear-gradient(145deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  padding: 20px 16px 16px;
}

@media (min-width: 768px) {
  .today-header {
    padding: 32px 32px 28px;
    border-radius: 0;
  }
  .today-header__day { font-size: 2.25rem; }

  /* Meal cards grid */
  .meals-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .meals-grid .meal-card { margin-bottom: 0 !important; }

  /* Nutrition summary wider */
  .nutrition-summary { max-width: 100%; }

  /* Week view: wider tabs */
  .week-tabs { padding: 12px 24px 0; gap: 4px; }
  .week-tab { padding: 8px 18px 12px; font-size: 0.8125rem; }

  /* Chat full height */
  .chat-container { height: 100dvh; }
  .chat-input-bar { padding-bottom: 16px; }

  /* Library grid */
  .library-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .library-grid .meal-card { margin-bottom: 0 !important; }
}

.today-header__date {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-bottom: 4px;
}

.today-header__day {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.today-header__badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.day-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.2);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ── Week View ───────────────────────────────────────────────────── */
.week-tabs {
  display: flex;
  gap: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 10px 12px 0;
}

.week-tabs::-webkit-scrollbar { display: none; }

.week-tab {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 12px 10px;
  color: var(--color-text-hint);
  font-size: 0.75rem;
  font-weight: 600;
  border-bottom: 2.5px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.week-tab__day { font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.04em; }
.week-tab__date {
  font-size: 1.125rem;
  font-weight: 800;
  line-height: 1.1;
}

.week-tab:hover { color: var(--color-primary); }
.week-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.week-tab.today .week-tab__date {
  width: 30px; height: 30px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

/* ── Library View ────────────────────────────────────────────────── */
.library-toolbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 16px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.search-input {
  flex: 1;
  padding: 9px 12px 9px 36px;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition);
}

.search-input:focus { border-color: var(--color-primary); }

.search-wrapper {
  position: relative;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-hint);
  pointer-events: none;
  font-size: 1rem;
}

.filter-chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 10px 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.filter-chips::-webkit-scrollbar { display: none; }

.chip {
  flex-shrink: 0;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 600;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  color: var(--color-text-sub);
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}

.chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.chip.active {
  background: var(--color-primary-pale);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ── Chat View ───────────────────────────────────────────────────── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - var(--nav-height) - var(--safe-bottom));
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  padding-bottom: 8px;
  display: flex;
  flex-direction: column;
  -webkit-overflow-scrolling: touch;
}

.chat-input-bar {
  padding: 10px 12px calc(10px + var(--safe-bottom));
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  resize: none;
  outline: none;
  max-height: 120px;
  overflow-y: auto;
  transition: border-color var(--transition);
  line-height: 1.4;
}

.chat-input:focus { border-color: var(--color-primary); }

/* ── Settings View ───────────────────────────────────────────────── */
.settings-section {
  margin-bottom: 24px;
}

.settings-section__title {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-hint);
  padding: 0 4px;
  margin-bottom: 10px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--color-surface);
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  margin-bottom: 8px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.settings-item__info { flex: 1; min-width: 0; }
.settings-item__title { font-size: 0.9375rem; font-weight: 600; margin-bottom: 1px; }
.settings-item__sub { font-size: 0.8125rem; color: var(--color-text-sub); }

/* ── Shopping View ───────────────────────────────────────────────── */
.shopping-category {
  margin-bottom: 20px;
}

.shopping-category__title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-sub);
  padding: 0 4px;
  margin-bottom: 8px;
}

.shopping-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  margin-bottom: 4px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition);
}

.shopping-item.checked {
  background: var(--color-bg);
  opacity: 0.6;
}

.shopping-item.checked .shopping-item__name {
  text-decoration: line-through;
  color: var(--color-text-hint);
}

.shopping-checkbox {
  width: 20px; height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.shopping-item.checked .shopping-checkbox {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.shopping-item__name { font-size: 0.9375rem; font-weight: 500; flex: 1; }
.shopping-item__qty { font-size: 0.8125rem; color: var(--color-text-sub); }

/* ── Plan Mode Cards ─────────────────────────────────────────────── */
.plan-mode-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: 8px;
}

.plan-mode-card:hover { border-color: var(--color-primary); }
.plan-mode-card.active {
  border-color: var(--color-primary);
  background: var(--color-primary-pale);
}

.plan-mode-card__icon { font-size: 1.5rem; flex-shrink: 0; }
.plan-mode-card__title { font-weight: 600; margin-bottom: 2px; }
.plan-mode-card__sub { font-size: 0.8125rem; color: var(--color-text-sub); }
.plan-mode-card__check {
  margin-left: auto;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.plan-mode-card.active .plan-mode-card__check {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}