/* ===== 2-Column Layout (Desktop) ===== */
.app-layout { display: block; }
.sidebar { display: none; }

@media (min-width: 768px) {
  .app-container { max-width: 1200px; }
  .app-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 2rem;
    align-items: start;
  }
  .sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: sticky;
    top: 1rem;
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
    scrollbar-width: thin;
  }
}
@media (min-width: 1024px) {
  .app-layout { grid-template-columns: 1fr 380px; }
}

/* Sidebar Cards */
.sidebar-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1.25rem;
  animation: fadeInUp 400ms cubic-bezier(0.25,0.46,0.45,0.94) both;
  transition: border-color 200ms ease;
}
.sidebar-card:hover {
  border-color: var(--color-primary);
}
.sidebar-card-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-divider);
}

/* Sidebar: Latest Analysis */
.sidebar-latest { text-align: center; }
.sidebar-latest-emoji { font-size: 2.5rem; line-height: 1; margin-bottom: 0.5rem; }
.sidebar-latest-emotion { font-size: 0.95rem; font-weight: 500; color: var(--color-text); margin-bottom: 0.25rem; }
.sidebar-latest-message { font-family: var(--font-diary); font-size: 0.85rem; color: var(--color-text-light); line-height: 1.6; }
.sidebar-latest-time { font-size: 0.75rem; color: var(--color-text-muted); margin-top: 0.5rem; }
.sidebar-empty { text-align: center; color: var(--color-text-muted); font-size: 0.85rem; padding: 1rem 0; }

/* Sidebar: Today Summary */
.sidebar-today-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.sidebar-today-item {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.85rem; color: var(--color-text);
  padding: 0.4rem 0.6rem;
  background: var(--color-surface-warm);
  border-radius: var(--radius-sm);
}
.sidebar-today-item-emoji { font-size: 1.1rem; flex-shrink: 0; }
.sidebar-today-item-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Sidebar: Streak */
.sidebar-streak { display: flex; align-items: center; gap: 1rem; }
.streak-number { font-size: 2rem; font-weight: 700; color: var(--color-primary); line-height: 1; min-width: 3rem; text-align: center; }
.streak-info { flex: 1; }
.streak-label { font-size: 0.9rem; font-weight: 500; color: var(--color-text); }
.streak-sub { font-size: 0.75rem; color: var(--color-text-muted); margin-top: 0.15rem; }
.streak-dots { display: flex; gap: 4px; margin-top: 0.75rem; }
.streak-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--color-border); transition: background 300ms ease;
}
.streak-dot.active { background: var(--color-primary); }
.streak-dot.today { box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 3px var(--color-primary); }

/* Sidebar: Weekly Mini Chart (768px+) */
.sidebar-weekly-chart { display: none; }
@media (min-width: 768px) {
  .sidebar-weekly-chart { display: block; }
}
.mini-chart { display: flex; align-items: flex-end; gap: 6px; height: 80px; padding-top: 0.5rem; }
.mini-chart-bar-wrap { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; height: 100%; }
.mini-chart-bar { flex: 1; width: 100%; display: flex; align-items: flex-end; }
.mini-chart-bar-fill {
  width: 100%; border-radius: 4px 4px 0 0;
  background: var(--color-primary); min-height: 2px;
  transition: height 600ms cubic-bezier(0.25,0.46,0.45,0.94);
  opacity: 0.7;
}
.mini-chart-bar-fill.today-bar { opacity: 1; background: var(--color-primary-hover); }
.mini-chart-label { font-size: 0.65rem; color: var(--color-text-muted); text-align: center; }
.mini-chart-count { font-size: 0.6rem; color: var(--color-text-muted); text-align: center; min-height: 0.8rem; }


/* Mobile Streak Banner */
.mobile-streak-banner {
  display: none;
}
@media (max-width: 767px) {
  .mobile-streak-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 0.6rem 1rem;
    margin-bottom: 1rem;
    animation: fadeInUp 400ms cubic-bezier(0.25,0.46,0.45,0.94) both;
  }
  .mobile-streak-banner:empty,
  .mobile-streak-banner[hidden] {
    display: none;
  }
  .mobile-streak-dots {
    display: flex;
    gap: 3px;
    flex-shrink: 0;
  }
  .mobile-streak-dots .streak-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
  }
  .mobile-streak-dots .streak-dot.active {
    background: var(--color-primary);
  }
  .mobile-streak-dots .streak-dot.today {
    box-shadow: 0 0 0 1.5px var(--color-surface), 0 0 0 2.5px var(--color-primary);
  }
  .mobile-streak-text {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
  }
  .mobile-streak-today {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-left: auto;
    white-space: nowrap;
  }
}

/* Tab Navigation */
.tab-nav {
  display: flex;
  gap: 4px;
  margin-bottom: 1.5rem;
  background: var(--color-surface-warm);
  border-radius: var(--radius-lg);
  padding: 4px;
  overflow: hidden;
  animation: fadeInUp 500ms 50ms cubic-bezier(0.25,0.46,0.45,0.94) both;
}
.tab-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 0.65rem 1rem;
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 200ms ease, background 200ms ease, box-shadow 200ms ease;
  position: relative;
  border-radius: var(--radius-md);
}
.tab-btn:hover {
  color: var(--color-text-light);
}
.tab-btn[aria-selected="true"] {
  color: var(--color-text);
  font-weight: 600;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}
.tab-btn[aria-selected="true"]::after {
  display: none;
}
.tab-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}
.tab-panel[hidden] { display: none; }
.tab-panel { animation: tabFadeIn 250ms ease-out both; }
@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}