/* ==========================================================================
   PP社区 — Design System Tokens & Shared Shell / Primitives (IG Minimalist)
   Strict light + dark theme tokens, zero gradients/glow, zero backdrop-filter.
   ========================================================================== */

:root {
  color-scheme: light dark;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Type Scale */
  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-base: 14px;
  --fs-md: 16px;
  --fs-lg: 18px;
  --fs-xl: 20px;
  --fs-2xl: 26px;

  /* Radii */
  --r-xs: 6px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-pill: 999px;

  /* Layout Dimensions */
  --topbar-h: 56px;
  --sidebar-w: 224px;
  --sidebar-rail-w: 72px;
  --tabbar-h: 56px;

  /* Z-index Hierarchy */
  --z-base: 1;
  --z-sticky: 20;
  --z-topbar: 30;
  --z-sidebar: 40;
  --z-tabbar: 40;
  --z-scrim: 45;
  --z-drawer: 50;
  --z-popover: 60;
  --z-tooltip: 70;
  --z-modal: 80;
  --z-sheet: 85;
  --z-lightbox: 90;
  --z-toast: 100;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-press: cubic-bezier(0.2, 0, 0, 1);
  --t-fast: 120ms;
  --t-base: 180ms;
  --t-slow: 260ms;
}

:root,
[data-theme="light"] {
  color-scheme: light;
  --bg-canvas: #FFFFFF;
  --bg-surface: #FAFAFA;
  --bg-elevated: #FFFFFF;
  --bg-muted: #EFEFEF;
  --bg-hover: rgba(0, 0, 0, 0.04);
  --bg-active: rgba(0, 0, 0, 0.07);
  --bg-backdrop: rgba(0, 0, 0, 0.65);
  --bg-media: #141414;

  --text-primary: #0F1419;
  --text-secondary: #687684;
  --text-tertiary: #8E99A4;
  --text-on-accent: #FFFFFF;
  --text-on-media: #FFFFFF;

  --border-hairline: #E6E6E6;
  --border-strong: #CCCCCC;

  --accent: #0095F6;
  --accent-hover: #1877F2;
  --accent-soft: rgba(0, 149, 246, 0.12);
  --heart: #FF3040;
  --success: #16A34A;
  --success-soft: rgba(22, 163, 74, 0.12);
  --warning: #D97706;
  --warning-soft: rgba(217, 119, 6, 0.14);
  --danger: #ED4956;
  --danger-soft: rgba(237, 73, 86, 0.12);

  --badge-open: rgba(22, 163, 74, 0.12);
  --badge-open-text: #15803D;
  --badge-free: rgba(0, 149, 246, 0.12);
  --badge-free-text: #0284C7;
  --badge-paid: rgba(217, 119, 6, 0.14);
  --badge-paid-text: #B45309;

  --skeleton-a: #EFEFEF;
  --skeleton-b: #F7F7F7;

  --shadow-popover: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-modal: 0 12px 48px rgba(0, 0, 0, 0.22);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg-canvas: #000000;
  --bg-surface: #121212;
  --bg-elevated: #212121;
  --bg-muted: #262626;
  --bg-hover: rgba(255, 255, 255, 0.06);
  --bg-active: rgba(255, 255, 255, 0.10);
  --bg-backdrop: rgba(0, 0, 0, 0.80);
  --bg-media: #0A0A0A;

  --text-primary: #F5F5F5;
  --text-secondary: #A8A8A8;
  --text-tertiary: #737373;
  --text-on-accent: #FFFFFF;
  --text-on-media: #FFFFFF;

  --border-hairline: #262626;
  --border-strong: #3A3A3A;

  --accent: #0095F6;
  --accent-hover: #1877F2;
  --accent-soft: rgba(0, 149, 246, 0.18);
  --heart: #FF3040;
  --success: #22C55E;
  --success-soft: rgba(34, 197, 94, 0.16);
  --warning: #F59E0B;
  --warning-soft: rgba(245, 158, 11, 0.18);
  --danger: #F87171;
  --danger-soft: rgba(248, 113, 113, 0.16);

  --badge-open: rgba(34, 197, 94, 0.18);
  --badge-open-text: #4ADE80;
  --badge-free: rgba(0, 149, 246, 0.18);
  --badge-free-text: #38BDF8;
  --badge-paid: rgba(245, 158, 11, 0.20);
  --badge-paid-text: #FBBF24;

  --skeleton-a: #1C1C1C;
  --skeleton-b: #282828;

  --shadow-popover: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-modal: 0 12px 48px rgba(0, 0, 0, 0.65);
  --shadow-card: 0 0 0 1px #262626;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  overflow-x: clip;
}

body.pp-modal-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.pp-tabular {
  font-variant-numeric: tabular-nums;
}

.pp-mono {
  font-family: var(--font-mono);
}

.pp-hidden {
  display: none !important;
}

.pp-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Icons */
.pp-icon {
  width: 22px;
  height: 22px;
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}

.pp-icon--sm { width: 16px; height: 16px; }
.pp-icon--md { width: 20px; height: 20px; }
.pp-icon--lg { width: 24px; height: 24px; }
.pp-icon--xl { width: 44px; height: 44px; }

/* Scrollbar (subtle desktop only) */
@media (min-width: 768px) {
  ::-webkit-scrollbar { width: 8px; height: 8px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: var(--r-pill);
    border: 2px solid transparent;
    background-clip: content-box;
  }
}

/* ==========================================================================
   Buttons & Interactive Controls
   ========================================================================== */
.pp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 16px;
  border-radius: var(--r-sm);
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-press);
}

.pp-btn:active:not(:disabled) {
  transform: scale(0.97);
}

.pp-btn--primary {
  background: var(--accent);
  color: var(--text-on-accent);
}
.pp-btn--primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.pp-btn--secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-hairline);
}
.pp-btn--secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.pp-btn--ghost {
  background: transparent;
  color: var(--text-primary);
}
.pp-btn--ghost:hover:not(:disabled) {
  background: var(--bg-hover);
}

.pp-btn--danger {
  background: var(--danger-soft);
  color: var(--danger);
}
.pp-btn--danger:hover:not(:disabled) {
  background: var(--danger);
  color: #FFFFFF;
}

.pp-btn--danger-solid {
  background: var(--danger);
  color: #FFFFFF;
}

.pp-btn--sm {
  min-height: 32px;
  padding: 0 12px;
  font-size: var(--fs-sm);
}

.pp-btn--lg {
  min-height: 44px;
  padding: 0 20px;
  font-size: var(--fs-base);
}

.pp-btn--block {
  width: 100%;
}

.pp-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-pill);
  color: var(--text-primary);
  flex-shrink: 0;
  transition: background-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-press);
}

.pp-icon-btn:hover:not(:disabled) {
  background: var(--bg-hover);
}

.pp-icon-btn:active:not(:disabled) {
  transform: scale(0.93);
}

/* ==========================================================================
   Inputs, Selects & IG Search Field
   ========================================================================== */
.pp-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pp-label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.pp-hint {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
}

.pp-input,
.pp-textarea,
.pp-select {
  width: 100%;
  min-height: 42px;
  padding: 9px 12px;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-sm);
  font-size: var(--fs-base);
  transition: border-color var(--t-fast) var(--ease-out),
              background-color var(--t-fast) var(--ease-out);
}

.pp-textarea {
  min-height: 96px;
  resize: vertical;
  line-height: 1.55;
}

.pp-input::placeholder,
.pp-textarea::placeholder {
  color: var(--text-tertiary);
}

.pp-input:focus,
.pp-textarea:focus,
.pp-select:focus {
  outline: none;
  background: var(--bg-elevated);
  border-color: var(--text-primary);
}

/* IG Search Pill */
.pp-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 12px;
  background: var(--bg-muted);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  transition: border-color var(--t-fast) var(--ease-out),
              background-color var(--t-fast) var(--ease-out);
}

.pp-search:focus-within {
  background: var(--bg-elevated);
  border-color: var(--border-strong);
}

.pp-search__icon {
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.pp-search__input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text-primary);
  font-size: var(--fs-base);
  outline: none;
}

.pp-search__input::placeholder {
  color: var(--text-tertiary);
}

.pp-search__kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 20px;
  min-width: 20px;
  padding: 0 5px;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  color: var(--text-tertiary);
  font-size: 11px;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.pp-search__clear {
  display: none;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: var(--r-pill);
  background: var(--text-tertiary);
  color: var(--bg-canvas);
  flex-shrink: 0;
}

.pp-search.has-value .pp-search__clear {
  display: inline-flex;
}

.pp-search.has-value .pp-search__kbd {
  display: none;
}

/* ==========================================================================
   Chips, Pills & Segmented Control
   ========================================================================== */
.pp-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 32px;
  padding: 0 14px;
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-hairline);
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out);
}

.pp-chip:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.pp-chip.is-active {
  background: var(--text-primary);
  color: var(--bg-canvas);
  border-color: var(--text-primary);
  font-weight: 600;
}

.pp-seg {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: var(--r-sm);
  background: var(--bg-muted);
}

.pp-seg__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: var(--r-xs);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out);
}

.pp-seg__btn.is-active {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: var(--shadow-card);
}

/* Badges */
.pp-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}

.pp-badge--open { background: var(--badge-open); color: var(--badge-open-text); }
.pp-badge--free { background: var(--badge-free); color: var(--badge-free-text); }
.pp-badge--paid { background: var(--badge-paid); color: var(--badge-paid-text); }
.pp-badge--muted { background: var(--bg-muted); color: var(--text-secondary); }
.pp-badge--danger { background: var(--danger-soft); color: var(--danger); }

/* ==========================================================================
   Avatar
   ========================================================================== */
.pp-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-pill);
  background: var(--bg-muted);
  color: var(--text-primary);
  font-weight: 700;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--border-hairline);
  user-select: none;
}

.pp-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.pp-avatar--24 { width: 24px; height: 24px; font-size: 11px; }
.pp-avatar--28 { width: 28px; height: 28px; font-size: 12px; }
.pp-avatar--32 { width: 32px; height: 32px; font-size: 13px; }
.pp-avatar--36 { width: 36px; height: 36px; font-size: 14px; }
.pp-avatar--44 { width: 44px; height: 44px; font-size: 16px; }
.pp-avatar--77 { width: 77px; height: 77px; font-size: 28px; }
.pp-avatar--150 { width: 150px; height: 150px; font-size: 52px; }

/* ==========================================================================
   Panels, Popovers & Lists
   ========================================================================== */
.pp-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
}

.pp-popover {
  position: fixed;
  z-index: var(--z-popover);
  min-width: 220px;
  max-width: calc(100vw - 24px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-popover);
  padding: 6px;
}

.pp-menu-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  font-size: var(--fs-base);
  color: var(--text-primary);
  text-align: left;
  transition: background-color var(--t-fast) var(--ease-out);
}

.pp-menu-item:hover {
  background: var(--bg-hover);
}

.pp-menu-item--danger {
  color: var(--danger);
}

.pp-menu-sep {
  height: 1px;
  margin: 6px 4px;
  background: var(--border-hairline);
}

/* ==========================================================================
   Skeleton, Empty State & Toast
   ========================================================================== */
@keyframes pp-shimmer {
  0% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.pp-skeleton {
  background: linear-gradient(90deg, var(--skeleton-a) 25%, var(--skeleton-b) 37%, var(--skeleton-a) 63%);
  background-size: 400% 100%;
  animation: pp-shimmer 1.4s ease infinite;
  border-radius: var(--r-sm);
}

@media (prefers-reduced-motion: reduce) {
  .pp-skeleton {
    animation: none;
    background: var(--skeleton-a);
  }
}

.pp-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 56px 24px;
  gap: 12px;
  color: var(--text-secondary);
}

.pp-empty__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--r-pill);
  border: 1.5px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.pp-empty__title {
  margin: 0;
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.pp-empty__desc {
  margin: 0;
  max-width: 340px;
  font-size: var(--fs-base);
  color: var(--text-secondary);
}

.pp-toast-host {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
  max-width: min(420px, calc(100vw - 32px));
}

@media (max-width: 767.98px) {
  body.pp-has-tabbar .pp-toast-host {
    bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 12px);
  }
}

.pp-toast {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  background: var(--text-primary);
  color: var(--bg-canvas);
  font-size: var(--fs-base);
  font-weight: 500;
  box-shadow: var(--shadow-popover);
}

.pp-toast--danger {
  background: var(--danger);
  color: #FFFFFF;
}

.pp-toast__action {
  color: var(--accent);
  font-weight: 700;
  padding: 2px 4px;
  border-radius: 4px;
}

.pp-toast--danger .pp-toast__action {
  color: #FFFFFF;
  text-decoration: underline;
}

/* ==========================================================================
   Modal / Confirm / Key Reveal Dialogs
   ========================================================================== */
.pp-dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: var(--bg-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.pp-dialog-card {
  width: min(400px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-modal);
  overflow: hidden;
}

.pp-dialog-card--wide {
  width: min(520px, 100%);
}

.pp-dialog-head {
  padding: 20px 20px 8px;
  text-align: center;
}

.pp-dialog-title {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--text-primary);
}

.pp-dialog-body {
  padding: 8px 20px 20px;
  font-size: var(--fs-base);
  color: var(--text-secondary);
  text-align: center;
}

.pp-dialog-actions {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-hairline);
}

.pp-dialog-action {
  min-height: 48px;
  padding: 0 16px;
  font-size: var(--fs-base);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 1px solid var(--border-hairline);
}

.pp-dialog-action:first-child {
  border-top: 0;
}

.pp-dialog-action:hover {
  background: var(--bg-hover);
}

.pp-dialog-action--primary { color: var(--accent); font-weight: 700; }
.pp-dialog-action--danger { color: var(--danger); font-weight: 700; }
.pp-dialog-action--cancel { color: var(--text-primary); font-weight: 400; }

/* ==========================================================================
   App Shell: Topbar + Responsive Sidebar + Mobile 5-Tab Bar
   ========================================================================== */
.pp-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-topbar);
  height: var(--topbar-h);
  background: var(--bg-canvas);
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  transition: transform var(--t-base) var(--ease-out);
}

.pp-topbar.is-hidden-mobile {
  transform: translateY(-100%);
}

@media (min-width: 768px) {
  .pp-topbar.is-hidden-mobile {
    transform: none;
  }
}

.pp-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  flex-shrink: 0;
}

.pp-brand__logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  object-fit: cover;
  display: block;
}

.pp-brand__name {
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.pp-topbar__title {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pp-topbar__spacer {
  flex: 1;
  min-width: 0;
}

.pp-topbar__search-wrap {
  flex: 1;
  max-width: 440px;
  min-width: 180px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pp-topbar__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Sidebar */
.pp-scrim {
  position: fixed;
  inset: 0;
  z-index: var(--z-scrim);
  background: var(--bg-backdrop);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base) var(--ease-out);
}

.pp-scrim.is-open {
  opacity: 1;
  pointer-events: auto;
}

.pp-sidebar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  bottom: 0;
  z-index: var(--z-sidebar);
  width: var(--sidebar-w);
  background: var(--bg-canvas);
  border-right: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  padding: 12px 10px;
  gap: 4px;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--t-base) var(--ease-out),
              transform var(--t-base) var(--ease-out);
}

.pp-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  font-size: var(--fs-md);
  font-weight: 400;
  color: var(--text-primary);
  text-align: left;
  white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-press);
}

.pp-nav-item:hover {
  background: var(--bg-hover);
}

.pp-nav-item:active {
  transform: scale(0.98);
}

.pp-nav-item.is-active {
  font-weight: 700;
}

.pp-nav-item__label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.pp-sidebar__spacer {
  flex: 1;
}

.pp-sidebar__foot {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 8px;
  border-top: 1px solid var(--border-hairline);
}

/* Desktop collapsed rail */
@media (min-width: 1024px) {
  body.pp-sidebar-collapsed .pp-sidebar {
    width: var(--sidebar-rail-w);
    padding: 12px 10px;
  }
  body.pp-sidebar-collapsed .pp-nav-item {
    justify-content: center;
    padding: 0;
  }
  body.pp-sidebar-collapsed .pp-nav-item__label {
    display: none;
  }
  body.pp-sidebar-collapsed .pp-main {
    margin-left: var(--sidebar-rail-w);
  }
}

/* Tablet (768px - 1023.98px): rail by default, overlay drawer when .is-drawer-open */
@media (min-width: 768px) and (max-width: 1023.98px) {
  .pp-sidebar {
    width: var(--sidebar-rail-w);
    z-index: var(--z-drawer);
  }
  .pp-sidebar .pp-nav-item {
    justify-content: center;
    padding: 0;
  }
  .pp-sidebar .pp-nav-item__label {
    display: none;
  }
  body.pp-tablet-drawer-open .pp-sidebar {
    width: var(--sidebar-w);
    box-shadow: var(--shadow-modal);
  }
  body.pp-tablet-drawer-open .pp-sidebar .pp-nav-item {
    justify-content: flex-start;
    padding: 0 12px;
  }
  body.pp-tablet-drawer-open .pp-sidebar .pp-nav-item__label {
    display: inline;
  }
}

/* Mobile (< 768px): no sidebar, bottom 5-tab bar */
@media (max-width: 767.98px) {
  .pp-sidebar {
    display: none;
  }
  .pp-topbar {
    height: 48px;
    padding: 0 10px;
    gap: 8px;
  }
}

/* Tooltip for collapsed rail */
.pp-rail-tooltip {
  position: fixed;
  z-index: var(--z-tooltip);
  padding: 6px 10px;
  border-radius: var(--r-xs);
  background: var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  color: var(--text-primary);
  font-size: var(--fs-sm);
  font-weight: 500;
  box-shadow: var(--shadow-popover);
  pointer-events: none;
  white-space: nowrap;
}

/* Main Content Area */
.pp-main {
  padding-top: var(--topbar-h);
  min-height: 100dvh;
  transition: margin-left var(--t-base) var(--ease-out);
}

@media (min-width: 1024px) {
  .pp-main {
    margin-left: var(--sidebar-w);
  }
}

@media (min-width: 768px) and (max-width: 1023.98px) {
  .pp-main {
    margin-left: var(--sidebar-rail-w);
  }
}

@media (max-width: 767.98px) {
  .pp-main {
    margin-left: 0;
    padding-top: 48px;
  }
  body.pp-has-tabbar .pp-main {
    padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 16px);
  }
}

/* No-sidebar page shell (login, fullscreen publish) */
body.pp-no-sidebar .pp-main {
  margin-left: 0 !important;
}

/* Mobile Bottom 5-Tab Bar */
.pp-tabbar {
  display: none;
}

@media (max-width: 767.98px) {
  body.pp-has-tabbar .pp-tabbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-tabbar);
    height: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--bg-canvas);
    border-top: 1px solid var(--border-hairline);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    align-items: center;
  }

  body.pp-keyboard-open .pp-tabbar {
    display: none !important;
  }
}

.pp-tabbar__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: var(--tabbar-h);
  min-width: 44px;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
}

.pp-tabbar__item.is-active {
  color: var(--text-primary);
  font-weight: 700;
}

.pp-tabbar__avatar {
  width: 24px;
  height: 24px;
  border-radius: var(--r-pill);
  border: 1.5px solid transparent;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-muted);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-primary);
}

.pp-tabbar__item.is-active .pp-tabbar__avatar {
  border-color: var(--text-primary);
}