/* ========== Reset & Base ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      /* Backgrounds */
      --bg: #09090b;
      --surface: rgba(255,255,255,0.03);
      --surface-alt: rgba(255,255,255,0.05);
      --surface-hover: rgba(255,255,255,0.07);

      /* Borders */
      --border: rgba(255,255,255,0.06);
      --border-hover: rgba(255,255,255,0.12);

      /* Text */
      --text: #f4f4f6;
      --text-secondary: #a1a1aa;
      --text-tertiary: #71717a;

      /* Accent */
      --accent: #6c5ce7;
      --accent-hover: #7c6ff7;
      --accent-soft: rgba(108,92,231,0.12);
      --accent-rgb: 108,92,231;

      /* Semantic */
      --success: #22c55e;
      --danger: #ef4444;
      --warning: #f59e0b;

      /* Radius */
      --radius-sm: 6px;
      --radius: 10px;
      --radius-lg: 14px;

      /* Shadows */
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
      --shadow: 0 4px 12px rgba(0,0,0,0.5);
      --shadow-lg: 0 8px 24px rgba(0,0,0,0.6);

      /* Drawer */
      --drawer-width: 420px;
      --transition: 0.2s ease;
    }

    body {
      font-family: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      min-height: 100vh;
      background: var(--bg);
      color: var(--text);
      -webkit-font-smoothing: antialiased;
      overflow-x: clip;
    }

    /* ========== Dino Link — Top Left ========== */
    .dino-link {
      position: fixed;
      top: 20px;
      left: 20px;
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
      cursor: pointer;
    }

    .dino-link:hover {
      transform: scale(1.1) rotate(-3deg);
    }

    .dino-link:hover .dino-bubble {
      opacity: 1;
      transform: translateX(0);
    }

    .dino-svg {
      width: 56px;
      height: 56px;
      filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
      transition: filter 0.3s;
    }

    .dino-link:hover .dino-svg {
      filter: drop-shadow(0 6px 18px rgba(255, 200, 100, 0.5));
    }

    .dino-bubble {
      background: #fff;
      color: #2d3436;
      padding: 6px 14px;
      border-radius: 14px;
      font-size: 0.8rem;
      font-weight: 600;
      white-space: nowrap;
      opacity: 0;
      transform: translateX(-10px);
      transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
      box-shadow: 0 2px 10px rgba(0,0,0,0.15);
      position: relative;
    }

    .dino-bubble::after {
      content: '';
      position: absolute;
      left: -6px;
      top: 50%;
      transform: translateY(-50%);
      border: 6px solid transparent;
      border-right-color: #fff;
    }

    /* Dino walk animation */
    @keyframes dinoBounce {
      0%, 100% { transform: translateY(0); }
      30% { transform: translateY(-6px); }
      60% { transform: translateY(-2px); }
    }

    .dino-link {
      animation: dinoBounce 2s ease-in-out infinite;
    }
    .dino-link:hover {
      animation: none;
    }

    /* ========== Main Content Area ========== */
    .main-content {
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 40px;
    }

    /* ========== Music Player (inside right drawer) ========== */
    .music-drawer {
      position: fixed;
      top: 0;
      right: 0;
      width: var(--drawer-width);
      max-width: 90vw;
      height: 100vh;
      background: rgba(15,15,18,0.96);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 2100;
      transform: translateX(100%);
      transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-lg);
      border-left: 1px solid var(--border);
      overflow-y: auto;
    }
    .music-drawer.open { transform: translateX(0); }

    .music-drawer-inner {
      flex: 1;
      overflow-y: auto;
      padding: 28px 24px 20px;
    }

    .music-close {
      position: absolute;
      top: 14px;
      right: 14px;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid var(--border);
      background: var(--surface);
      cursor: pointer;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
      z-index: 10;
      color: var(--text-secondary);
    }
    .music-close:hover {
      background: rgba(239,68,68,0.15);
      color: var(--danger);
      border-color: var(--danger);
    }

    /* Right edge music toggle */
    .music-toggle {
      position: fixed;
      right: 0;
      top: 50%;
      transform: translateY(-50%);
      z-index: 1100;
      width: 44px;
      height: 80px;
      background: var(--accent);
      border: none;
      border-radius: 14px 0 0 14px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px var(--accent-soft);
      transition: all 0.25s ease;
      color: #fff;
      font-size: 1.1rem;
      writing-mode: vertical-lr;
    }
    .music-toggle:hover {
      background: var(--accent-hover);
      box-shadow: 0 0 30px rgba(var(--accent-rgb), 0.5);
    }

    .player-header {
      text-align: center;
      margin-bottom: 24px;
    }

    .player-header .player-title {
      font-size: 1.3rem;
      font-weight: 700;
      color: rgba(255,255,255,0.9);
      letter-spacing: -0.3px;
    }

    .player-header .now-playing {
      font-size: 0.82rem;
      color: rgba(255,255,255,0.45);
      margin-top: 4px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    /* === Category Tabs === */
    .music-tabs {
      display: flex;
      gap: 6px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .music-tab {
      padding: 8px 18px;
      border-radius: 20px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      background: transparent;
      color: rgba(255, 255, 255, 0.55);
      font-size: 0.82rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
      font-family: inherit;
    }

    .music-tab:hover {
      color: rgba(255, 255, 255, 0.85);
      border-color: rgba(255, 255, 255, 0.35);
      background: rgba(255, 255, 255, 0.05);
    }

    .music-tab.active {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
      box-shadow: 0 4px 16px rgba(var(--accent-rgb), 0.4);
    }

    /* === Visualizer === */
    /* ===== Center Visualizer ===== */
    .center-visualizer { display: none; }



    /* ========== Chat App (Main Center, WeChat Style) ========== */
    .chat-app {
      position: relative;
      width: var(--chat-w, 780px);
      max-width: 94vw;
      height: var(--chat-h, 600px);
      max-height: calc(100vh - 120px);
      min-width: 380px;
      min-height: 400px;
      margin: auto;
      cursor: grab;
      background: rgba(18,18,22,0.97);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: 16px;
      display: flex;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.03) inset;
      z-index: 100;
      animation: chatAppIn 0.5s ease;
      transition: none; /* resize is instant */
    }
    @keyframes chatAppIn {
      from { opacity: 0; transform: translateY(16px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* Resize handle — bottom-right corner */
    .chat-resize-handle {
      position: absolute;
      bottom: 0;
      right: 0;
      width: 24px;
      height: 24px;
      cursor: nwse-resize;
      z-index: 20;
      background: linear-gradient(135deg, transparent 60%, rgba(255,255,255,0.15) 60%);
      border-radius: 0 0 15px 0;
      transition: opacity 0.2s;
    }
    .chat-resize-handle:hover {
      background: linear-gradient(135deg, transparent 50%, rgba(var(--accent-rgb), 0.4) 50%);
    }

    /* Reset size button — top-right of chat window header */
    .chat-reset-size-btn,
    .chat-export-btn {
      width: 30px; height: 30px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.08);
      background: transparent;
      color: rgba(255,255,255,0.4);
      cursor: pointer;
      font-size: 0.85rem;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s;
      flex-shrink: 0;
    }
    .chat-reset-size-btn:hover,
    .chat-export-btn:hover {
      background: rgba(255,255,255,0.08);
      color: #fff;
      border-color: rgba(255,255,255,0.2);
    }

    /* Unlock button */
    .chat-unlock-btn {
      width: 30px; height: 30px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.08);
      background: transparent;
      color: rgba(255,255,255,0.4);
      cursor: pointer;
      font-size: 0.85rem;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s;
      flex-shrink: 0;
    }
    .chat-unlock-btn:hover {
      background: rgba(255,255,255,0.08);
      color: #fff;
      border-color: rgba(255,255,255,0.2);
    }
    .chat-unlock-btn.unlocked {
      background: rgba(34,197,94,0.15);
      color: var(--success);
      border-color: rgba(34,197,94,0.3);
      box-shadow: 0 0 8px rgba(34,197,94,0.2);
    }

    /* ---- Sidebar (Contact List) ---- */
    .chat-sidebar {
      width: 260px;
      flex-shrink: 0;
      border-right: 1px solid rgba(255,255,255,0.06);
      display: flex;
      flex-direction: column;
      background: rgba(255,255,255,0.015);
    }

    .sidebar-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 16px 12px;
      flex-shrink: 0;
    }
    .sidebar-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: rgba(255,255,255,0.85);
      letter-spacing: -0.3px;
    }
    .sidebar-manage-btn {
      width: 30px; height: 30px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.1);
      background: transparent;
      color: rgba(255,255,255,0.5);
      cursor: pointer;
      font-size: 1rem;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s;
    }
    .sidebar-manage-btn:hover {
      background: rgba(255,255,255,0.08);
      color: #fff;
    }

    .contact-list {
      flex: 1;
      overflow-y: auto;
      padding: 4px 8px 8px;
    }
    .contact-list::-webkit-scrollbar { width: 3px; }
    .contact-list::-webkit-scrollbar-thumb {
      background: rgba(255,255,255,0.06); border-radius: 2px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 12px;
      border-radius: 10px;
      cursor: pointer;
      transition: all 0.2s;
      margin-bottom: 2px;
    }
    .contact-item:hover {
      background: rgba(255,255,255,0.05);
    }
    .contact-item.active {
      background: rgba(var(--accent-rgb), 0.15);
      border: 1px solid rgba(var(--accent-rgb), 0.2);
    }
    .contact-item.unread::after {
      content: '';
      width: 8px; height: 8px;
      border-radius: 50%;
      background: var(--accent);
      flex-shrink: 0;
      margin-left: auto;
    }

    .contact-avatar {
      width: 42px; height: 42px;
      border-radius: 50%;
      flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.2rem;
      background: rgba(255,255,255,0.06);
      position: relative;
    }
    .contact-avatar .online-dot {
      position: absolute;
      bottom: 2px; right: 2px;
      width: 10px; height: 10px;
      border-radius: 50%;
      background: var(--success);
      border: 2px solid rgba(18,18,22,1);
    }

    .contact-info {
      flex: 1;
      min-width: 0;
    }
    .contact-name {
      font-size: 0.84rem;
      font-weight: 600;
      color: rgba(255,255,255,0.85);
      margin-bottom: 2px;
    }
    .contact-last-msg {
      font-size: 0.7rem;
      color: rgba(255,255,255,0.3);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    /* ---- Chat Window ---- */
    .chat-window {
      flex: 1;
      display: flex;
      flex-direction: column;
      min-width: 0;
      background: rgba(0,0,0,0.15);
    }

    .chat-win-header {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      flex-shrink: 0;
      background: rgba(255,255,255,0.02);
    }
    .chat-back-btn {
      display: none;
      width: 30px; height: 30px;
      border-radius: 50%;
      border: none;
      background: transparent;
      color: rgba(255,255,255,0.5);
      cursor: pointer;
      font-size: 1.1rem;
      transition: all 0.2s;
    }
    .chat-back-btn:hover { color: #fff; }
    .chat-win-avatar {
      width: 38px; height: 38px;
      border-radius: 50%;
      background: rgba(255,255,255,0.08);
      display: flex; align-items: center; justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .chat-win-info { flex: 1; min-width: 0; }
    .chat-win-name {
      font-size: 0.88rem;
      font-weight: 600;
      color: rgba(255,255,255,0.9);
    }
    .chat-win-status {
      font-size: 0.68rem;
      color: var(--success);
    }
    .chat-win-settings-btn {
      width: 30px; height: 30px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.08);
      background: transparent;
      color: rgba(255,255,255,0.4);
      cursor: pointer;
      font-size: 0.85rem;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s;
    }
    .chat-win-settings-btn:hover {
      background: rgba(255,255,255,0.08);
      color: #fff;
    }

    /* Messages */
    .chat-win-messages {
      flex: 1;
      overflow-y: auto;
      padding: 16px 18px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      scroll-behavior: smooth;
    }
    .chat-win-messages::-webkit-scrollbar { width: 4px; }
    .chat-win-messages::-webkit-scrollbar-thumb {
      background: rgba(255,255,255,0.06); border-radius: 2px;
    }

    .chat-msg {
      display: flex;
      gap: 8px;
      max-width: 82%;
      animation: msgSlideIn 0.25s ease;
    }
    @keyframes msgSlideIn {
      from { opacity: 0; transform: translateY(6px) scale(0.98); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }
    .chat-msg.bot { align-self: flex-start; }
    .chat-msg.user {
      align-self: flex-end;
      flex-direction: row-reverse;
    }

    .chat-msg .msg-avatar {
      width: 32px; height: 32px;
      border-radius: 50%;
      flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      font-size: 0.8rem;
      margin-top: 2px;
    }
    .chat-msg.bot .msg-avatar { background: rgba(255,255,255,0.08); }
    .chat-msg.user .msg-avatar { background: rgba(var(--accent-rgb), 0.2); }

    .chat-msg .msg-bubble {
      padding: 10px 14px;
      border-radius: 14px;
      font-size: 0.85rem;
      line-height: 1.6;
      white-space: pre-wrap;
      word-break: break-word;
    }
    .chat-msg.bot .msg-bubble {
      background: rgba(255,255,255,0.05);
      color: rgba(255,255,255,0.88);
      border-top-left-radius: 4px;
    }
    .chat-msg.user .msg-bubble {
      background: rgba(var(--accent-rgb), 0.25);
      color: #fff;
      border-top-right-radius: 4px;
    }

    .msg-bubble .highlight {
      color: #fbbf24;
      font-weight: 600;
    }

    /* Typing */
    .chat-win-typing {
      display: none;
      align-self: flex-start;
      margin-left: 48px;
      padding: 8px 14px;
      background: rgba(255,255,255,0.04);
      border-radius: 14px;
      border-top-left-radius: 4px;
      gap: 4px;
      margin-bottom: 4px;
    }
    .chat-win-typing.show { display: flex; }
    .chat-win-typing span {
      width: 5px; height: 5px;
      border-radius: 50%;
      background: rgba(255,255,255,0.25);
      animation: tyBounce 1.2s infinite;
    }
    .chat-win-typing span:nth-child(2) { animation-delay: 0.2s; }
    .chat-win-typing span:nth-child(3) { animation-delay: 0.4s; }
    @keyframes tyBounce {
      0%, 60%, 100% { transform: translateY(0); }
      30% { transform: translateY(-6px); }
    }

    /* Quick actions */
    .chat-win-quick {
      display: flex;
      gap: 6px;
      padding: 8px 16px 4px;
      flex-shrink: 0;
      flex-wrap: wrap;
    }
    .quick-btn {
      padding: 5px 12px;
      border-radius: 14px;
      border: 1px solid rgba(255,255,255,0.08);
      background: rgba(255,255,255,0.03);
      color: rgba(255,255,255,0.5);
      font-size: 0.7rem;
      cursor: pointer;
      transition: all 0.2s;
      font-family: inherit;
      white-space: nowrap;
    }
    .quick-btn:hover {
      background: rgba(var(--accent-rgb), 0.12);
      border-color: rgba(var(--accent-rgb), 0.25);
      color: #fff;
    }

    /* Input area */
    .chat-win-input-area {
      display: flex;
      gap: 8px;
      padding: 10px 14px 14px;
      border-top: 1px solid rgba(255,255,255,0.05);
      flex-shrink: 0;
      background: rgba(255,255,255,0.015);
    }
    .chat-win-input-area input {
      flex: 1;
      padding: 10px 16px;
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 20px;
      background: rgba(255,255,255,0.04);
      color: #fff;
      font-size: 0.85rem;
      outline: none;
      font-family: inherit;
      transition: all 0.2s;
    }
    .chat-win-input-area input::placeholder {
      color: rgba(255,255,255,0.18);
    }
    .chat-win-input-area input:focus {
      border-color: rgba(var(--accent-rgb), 0.35);
      background: rgba(255,255,255,0.06);
      box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.08);
    }
    .chat-win-send-btn {
      width: 40px; height: 40px;
      border-radius: 50%;
      border: none;
      background: var(--accent);
      color: #fff;
      font-size: 1.1rem;
      cursor: pointer;
      flex-shrink: 0;
      transition: all 0.2s;
      display: flex; align-items: center; justify-content: center;
    }
    .chat-win-send-btn:hover {
      background: var(--accent-hover);
      transform: scale(1.06);
    }
    .chat-win-send-btn:active { transform: scale(0.94); }

    /* ---- Persona Overlay ---- */
    .persona-overlay {
      position: fixed;
      inset: 0;
      z-index: 3500;
      background: rgba(0,0,0,0.8);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }
    .persona-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    .persona-dialog {
      background: rgba(22,22,28,0.99);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 16px;
      width: 100%;
      max-width: 500px;
      max-height: 80vh;
      overflow-y: auto;
      padding: 24px;
      box-shadow: 0 20px 60px rgba(0,0,0,0.7);
      animation: dialogIn 0.3s ease;
    }
    @keyframes dialogIn {
      from { opacity: 0; transform: translateY(16px) scale(0.96); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }
    .persona-dialog h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 4px;
      color: rgba(255,255,255,0.9);
    }
    .persona-dialog .dialog-sub {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.35);
      margin-bottom: 18px;
      display: flex; align-items: center; gap: 12px;
      flex-wrap: wrap;
    }
    .import-chat-btn {
      font-size: 0.7rem;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.1);
      background: rgba(255,255,255,0.03);
      color: rgba(255,255,255,0.5);
      cursor: pointer;
      transition: all 0.2s;
      white-space: nowrap;
    }
    .import-chat-btn:hover {
      background: rgba(255,255,255,0.08);
      color: #fff;
      border-color: rgba(255,255,255,0.2);
    }
    .persona-dialog .preset-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-bottom: 16px;
    }
    .persona-dialog .preset-card {
      padding: 12px;
      border-radius: 10px;
      border: 1px solid rgba(255,255,255,0.08);
      background: rgba(255,255,255,0.03);
      cursor: pointer;
      transition: all 0.2s;
      text-align: center;
    }
    .persona-dialog .preset-card:hover {
      background: rgba(255,255,255,0.06);
      border-color: rgba(255,255,255,0.15);
    }
    .persona-dialog .preset-card.selected {
      border-color: var(--accent);
      background: rgba(var(--accent-rgb), 0.12);
      box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.2);
    }
    .preset-card .preset-avatar {
      font-size: 1.4rem; margin-bottom: 4px;
    }
    .preset-card .preset-name {
      font-size: 0.8rem; color: rgba(255,255,255,0.8); font-weight: 600;
    }
    .preset-card .preset-desc {
      font-size: 0.66rem; color: rgba(255,255,255,0.35); margin-top: 2px;
    }

    .persona-dialog .custom-input-area {
      margin-top: 8px;
    }
    .persona-dialog .custom-input-area label {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.4);
      display: block;
      margin-bottom: 6px;
    }
    .persona-dialog .custom-input-area textarea {
      width: 100%;
      padding: 10px 12px;
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 10px;
      background: rgba(255,255,255,0.04);
      color: #fff;
      font-size: 0.8rem;
      font-family: inherit;
      resize: vertical;
      min-height: 60px;
      outline: none;
      transition: all 0.2s;
    }
    .persona-dialog .custom-input-area textarea:focus {
      border-color: rgba(var(--accent-rgb), 0.35);
      background: rgba(255,255,255,0.06);
    }
    .persona-dialog .dialog-actions {
      display: flex;
      gap: 8px;
      justify-content: flex-end;
      margin-top: 16px;
    }
    .persona-dialog .dialog-btn {
      padding: 8px 18px;
      border-radius: 8px;
      border: 1px solid rgba(255,255,255,0.1);
      background: transparent;
      color: rgba(255,255,255,0.6);
      font-size: 0.8rem;
      cursor: pointer;
      font-family: inherit;
      transition: all 0.2s;
    }
    .persona-dialog .dialog-btn:hover { background: rgba(255,255,255,0.06); color: #fff; }
    .persona-dialog .dialog-btn.primary {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
    }
    .persona-dialog .dialog-btn.primary:hover { background: var(--accent-hover); }
    .persona-dialog .dialog-btn.danger-btn {
      color: var(--danger);
      border-color: transparent;
    }
    .persona-dialog .dialog-btn.danger-btn:hover {
      background: rgba(239,68,68,0.15);
      border-color: rgba(239,68,68,0.3);
    }

    /* Avatar picker */
    .avatar-picker-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 16px;
    }
    .avatar-preview {
      width: 56px; height: 56px;
      border-radius: 50%;
      background: #fff;
      flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.6rem;
      border: 2px solid rgba(255,255,255,0.15);
      transition: all 0.2s;
    }
    .avatar-input-row {
      flex: 1;
      min-width: 0;
    }
    .avatar-input-row label {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.4);
      display: block;
      margin-bottom: 6px;
    }
    .avatar-emoji-input {
      width: 100%;
      padding: 8px 12px;
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px;
      background: rgba(255,255,255,0.04);
      color: #fff;
      font-size: 1.2rem;
      text-align: center;
      outline: none;
      font-family: inherit;
      transition: all 0.2s;
    }
    .avatar-emoji-input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-soft);
    }
    .avatar-presets {
      display: flex;
      gap: 8px;
      margin-top: 8px;
      flex-wrap: wrap;
    }
    .avatar-preset-btn {
      width: 32px; height: 32px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.1);
      background: rgba(255,255,255,0.04);
      cursor: pointer;
      font-size: 1rem;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.15s;
    }
    .avatar-preset-btn:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--accent);
      transform: scale(1.1);
    }

    .persona-name-input {
      width: 100%;
      padding: 10px 12px;
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px;
      background: rgba(255,255,255,0.04);
      color: #fff;
      font-size: 0.9rem;
      font-family: inherit;
      outline: none;
      transition: all 0.2s;
    }
    .persona-name-input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-soft);
    }

    /* Add persona button in contact list */
    .contact-add-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 12px;
      margin: 4px 8px 8px;
      border-radius: 10px;
      border: 1px dashed rgba(255,255,255,0.12);
      background: transparent;
      color: rgba(255,255,255,0.35);
      cursor: pointer;
      font-size: 0.82rem;
      font-family: inherit;
      transition: all 0.2s;
      width: calc(100% - 16px);
    }
    .contact-add-btn:hover {
      background: rgba(255,255,255,0.04);
      color: rgba(255,255,255,0.7);
      border-color: rgba(255,255,255,0.25);
    }

    /* Long press to edit on contact items */
    .contact-item .contact-edit-hint {
      display: none;
      font-size: 0.6rem;
      color: rgba(255,255,255,0.3);
    }

    /* Empty chat state */
    .chat-empty {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 100%;
      color: rgba(255,255,255,0.2);
      gap: 8px;
      user-select: none;
    }
    .chat-empty .empty-icon { font-size: 3rem; opacity: 0.5; }
    .chat-empty .empty-text { font-size: 0.85rem; }

    /* ===== Responsive ===== */
    @media (max-width: 700px) {
      .chat-app {
        width: 100vw;
        max-width: 100vw;
        height: calc(100vh - 60px);
        max-height: calc(100vh - 60px);
        min-width: auto;
        min-height: auto;
        border-radius: 0;
        border: none;
      }
      .chat-resize-handle { display: none; }
      .chat-sidebar {
        width: 100%;
        border-right: none;
      }
      .chat-window {
        position: absolute;
        inset: 0;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 10;
      }
      .chat-window.show { transform: translateX(0); }
      .chat-back-btn { display: flex; }
    }

    /* Hide old chat components */
    .chat-toggle, #chatPanel, .chat-panel { display: none !important; }

    /* === Player Controls === */
    .player-controls {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn-play {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      border: none;
      background: var(--accent);
      color: #fff;
      font-size: 1.4rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.25s ease;
      flex-shrink: 0;
      box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.45);
    }

    .btn-play:hover {
      background: var(--accent-hover);
      transform: scale(1.06);
      box-shadow: 0 8px 28px rgba(var(--accent-rgb), 0.6);
    }

    .btn-play:active {
      transform: scale(0.95);
    }

    .btn-play.playing {
      background: rgba(255, 255, 255, 0.12);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    /* Volume Section */
    .volume-section {
      flex: 1;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .volume-icon {
      font-size: 1.1rem;
      cursor: pointer;
      user-select: none;
      opacity: 0.7;
      transition: opacity 0.2s;
      flex-shrink: 0;
    }

    .volume-icon:hover {
      opacity: 1;
    }

    .volume-slider {
      flex: 1;
      -webkit-appearance: none;
      appearance: none;
      height: 4px;
      border-radius: 2px;
      background: rgba(255, 255, 255, 0.15);
      outline: none;
      cursor: pointer;
    }

    .volume-slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: #fff;
      cursor: pointer;
      box-shadow: 0 2px 8px rgba(0,0,0,0.3);
      transition: transform 0.15s;
    }

    .volume-slider::-webkit-slider-thumb:hover {
      transform: scale(1.2);
    }

    /* Bilibili iframe container */
    .bili-container {
      width: 100%;
      border-radius: 12px;
      overflow: hidden;
      background: rgba(0, 0, 0, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
      transition: all 0.35s ease;
    }

    /* Full mode: show video */
    .bili-container.video-on {
      aspect-ratio: 16 / 9;
      margin-bottom: 16px;
    }

    /* Mini mode: audio only, slim bar */
    .bili-container.video-off {
      aspect-ratio: auto;
      height: 56px;
      margin-bottom: 16px;
      border-radius: 28px;
      display: flex;
      align-items: center;
      padding: 0 12px;
      gap: 10px;
    }

    .bili-container iframe {
      width: 100%;
      height: 100%;
      border: none;
      position: absolute;
      top: 0;
      left: 0;
    }

    .bili-container.video-off iframe {
      position: absolute;
      opacity: 0;
      pointer-events: none;
      width: 1px;
      height: 1px;
      top: -9999px;
      left: -9999px;
    }

    /* Audio-only mini bar */
    .audio-mini-bar {
      display: none;
      align-items: center;
      gap: 10px;
      flex: 1;
      z-index: 1;
    }

    .bili-container.video-off .audio-mini-bar {
      display: flex;
    }

    .bili-container.video-off .bili-loading {
      display: none !important;
    }

    .audio-mini-cover {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      flex-shrink: 0;
      animation: miniPulse 3s ease-in-out infinite;
    }

    @keyframes miniPulse {
      0%, 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.4); }
      50% { box-shadow: 0 0 0 8px rgba(var(--accent-rgb), 0); }
    }

    .audio-mini-info {
      flex: 1;
      min-width: 0;
    }

    .audio-mini-title {
      font-size: 0.78rem;
      color: rgba(255,255,255,0.8);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      font-weight: 500;
    }

    .audio-mini-sub {
      font-size: 0.68rem;
      color: rgba(255,255,255,0.35);
    }

    /* Video toggle button */
    .btn-video-toggle {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: rgba(255,255,255,0.5);
      padding: 5px 10px;
      border-radius: 6px;
      font-size: 0.7rem;
      cursor: pointer;
      transition: all 0.2s ease;
      font-family: inherit;
      flex-shrink: 0;
      z-index: 5;
    }

    .btn-video-toggle:hover {
      background: rgba(255, 255, 255, 0.14);
      color: rgba(255,255,255,0.8);
    }

    /* Floating close button when video is ON */
    .btn-video-toggle.floating-close {
      position: absolute;
      top: 8px;
      right: 8px;
      z-index: 20;
      background: rgba(0, 0, 0, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      padding: 6px 12px;
      border-radius: 8px;
      font-size: 0.78rem;
      font-weight: 600;
      backdrop-filter: blur(4px);
      -webkit-backdrop-filter: blur(4px);
    }
    .btn-video-toggle.floating-close:hover {
      background: rgba(239, 68, 68, 0.8);
      border-color: rgba(239, 68, 68, 0.5);
    }

    /* Loading placeholder */
    .bili-loading {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: rgba(255,255,255,0.4);
      font-size: 0.85rem;
      pointer-events: none;
    }

    /* Gradient animation for active bar glow */
    @keyframes glow {
      0%, 100% { box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.4); }
      50% { box-shadow: 0 0 18px rgba(var(--accent-rgb), 0.8); }
    }

    .btn-play.playing {
      animation: glow 2s ease-in-out infinite;
    }

    /* ========== Mode Toggle ========== */
    .mode-toggle-bar {
      display: flex;
      gap: 4px;
      background: rgba(255, 255, 255, 0.06);
      border-radius: 10px;
      padding: 3px;
      margin-top: 8px;
      margin-bottom: 20px;
    }

    .mode-toggle-btn {
      flex: 1;
      padding: 8px 12px;
      border: none;
      background: transparent;
      color: rgba(255, 255, 255, 0.45);
      border-radius: 8px;
      font-size: 0.8rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s ease;
      font-family: inherit;
    }

    .mode-toggle-btn.active {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 2px 8px rgba(var(--accent-rgb), 0.35);
    }

    .mode-toggle-btn:hover:not(.active) {
      color: rgba(255,255,255,0.75);
      background: rgba(255,255,255,0.04);
    }

    /* ========== Search Section ========== */
    .search-section {
      display: none;
      flex-direction: column;
      gap: 12px;
    }

    .search-section.visible {
      display: flex;
    }

    .channel-section {
      display: flex;
      flex-direction: column;
    }

    .channel-section.hidden {
      display: none;
    }

    .search-input-wrap {
      display: flex;
      gap: 8px;
    }

    .search-input-wrap input {
      flex: 1;
      padding: 10px 14px;
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: 10px;
      font-size: 0.88rem;
      outline: none;
      background: rgba(255, 255, 255, 0.07);
      color: rgba(255, 255, 255, 0.9);
      transition: all 0.25s ease;
      font-family: inherit;
    }

    .search-input-wrap input::placeholder {
      color: rgba(255, 255, 255, 0.3);
    }

    .search-input-wrap input:focus {
      border-color: var(--accent);
      background: rgba(255, 255, 255, 0.1);
      box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
    }

    .btn-search {
      padding: 10px 18px;
      border: none;
      border-radius: 10px;
      background: var(--accent);
      color: #fff;
      font-size: 0.85rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
      font-family: inherit;
    }

    .btn-search:hover {
      background: var(--accent-hover);
    }

    .btn-search:active {
      transform: scale(0.96);
    }

    /* ========== Search Results ========== */
    .search-results {
      list-style: none;
      max-height: 320px;
      overflow-y: auto;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .search-results::-webkit-scrollbar {
      width: 4px;
    }

    .search-results::-webkit-scrollbar-thumb {
      background: rgba(255,255,255,0.15);
      border-radius: 2px;
    }

    .song-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 12px;
      border-radius: 10px;
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
    }

    .song-item:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: rgba(255, 255, 255, 0.1);
    }

    .song-item.playing {
      background: rgba(var(--accent-rgb), 0.15);
      border-color: rgba(var(--accent-rgb), 0.3);
    }

    .song-cover {
      width: 40px;
      height: 40px;
      border-radius: 6px;
      object-fit: cover;
      flex-shrink: 0;
      background: rgba(255,255,255,0.05);
    }

    .song-info {
      flex: 1;
      min-width: 0;
    }

    .song-name {
      font-size: 0.85rem;
      color: rgba(255,255,255,0.88);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      font-weight: 500;
    }

    .song-artist {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.4);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-top: 2px;
    }

    .song-duration {
      font-size: 0.72rem;
      color: rgba(255,255,255,0.3);
      flex-shrink: 0;
    }

    .search-status {
      text-align: center;
      padding: 24px;
      color: rgba(255,255,255,0.35);
      font-size: 0.82rem;
    }

    /* ===== Search Audio Player ===== */
    .search-player {
      display: none;
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(10px);
      border-radius: 12px;
      padding: 14px 16px;
      margin-top: 12px;
      border: 1px solid rgba(255,255,255,0.08);
    }
    .search-player.show { display: flex; align-items: center; gap: 12px; }

    .sp-cover {
      width: 48px; height: 48px; border-radius: 8px;
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      display: flex; align-items: center; justify-content: center;
      font-size: 1.3rem; flex-shrink: 0;
    }
    .sp-cover.playing { animation: spPulse 1.5s ease-in-out infinite; }
    @keyframes spPulse {
      0%, 100% { box-shadow: 0 0 0 0 rgba(108,92,231,0.4); }
      50% { box-shadow: 0 0 0 12px rgba(108,92,231,0); }
    }

    .sp-center { flex: 1; min-width: 0; }
    .sp-name {
      font-size: 0.9rem; font-weight: 600; color: #fff;
      white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
      margin-bottom: 2px;
    }
    .sp-artist {
      font-size: 0.75rem; color: rgba(255,255,255,0.45);
      margin-bottom: 8px;
    }
    .sp-progress-wrap {
      display: flex; align-items: center; gap: 8px;
    }
    .sp-time {
      font-size: 0.65rem; color: rgba(255,255,255,0.35);
      font-variant-numeric: tabular-nums; min-width: 32px;
    }
    .sp-progress {
      flex: 1; height: 4px; -webkit-appearance: none; appearance: none;
      background: rgba(255,255,255,0.12); border-radius: 2px; outline: none;
      cursor: pointer;
    }
    .sp-progress::-webkit-slider-thumb {
      -webkit-appearance: none; width: 12px; height: 12px;
      border-radius: 50%; background: #fff; cursor: pointer;
      box-shadow: 0 1px 4px rgba(0,0,0,0.3);
    }
    .sp-play {
      width: 36px; height: 36px; border-radius: 50%;
      border: none; background: rgba(255,255,255,0.12);
      color: #fff; font-size: 1rem; cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s; flex-shrink: 0;
    }
    .sp-play:hover { background: rgba(255,255,255,0.2); }
    .sp-play.playing { background: var(--accent); }

    /* Hidden audio element */
    #audioPlayer { display: none; }

    /* ========== Todo Toggle Button (Left Edge) ========== */
    .todo-toggle {
      position: fixed;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      z-index: 1100;
      width: 44px;
      height: 80px;
      background: var(--accent);
      border: none;
      border-radius: 0 14px 14px 0;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px var(--accent-soft);
      transition: all 0.25s ease;
      color: #fff;
      font-size: 1.1rem;
      writing-mode: vertical-lr;
      letter-spacing: 2px;
    }

    .todo-toggle:hover {
      width: 52px;
      background: var(--accent-hover);
      box-shadow: 4px 0 30px rgba(var(--accent-rgb), 0.6);
    }

    .todo-toggle .toggle-text {
      font-weight: 700;
      font-size: 0.85rem;
    }

    .todo-toggle .todo-count-dot {
      position: absolute;
      top: 8px;
      right: 8px;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--success);
      display: none;
    }

    .todo-toggle .todo-count-dot.has-items {
      display: block;
    }

    /* ========== Overlay / Backdrop ========== */
    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 2000;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.35s ease, visibility 0.35s ease;
      backdrop-filter: blur(2px);
      -webkit-backdrop-filter: blur(2px);
    }

    .drawer-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    /* ========== Todo Drawer Panel ========== */
    .todo-drawer {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--drawer-width);
      max-width: 90vw;
      height: 100vh;
      background: rgba(15,15,18,0.96);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 2100;
      transform: translateX(-100%);
      transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-lg);
      border-right: 1px solid var(--border);
      overflow: hidden;
    }

    .todo-drawer.open {
      transform: translateX(0);
    }

    /* Drawer inner scrollable area */
    .drawer-inner {
      flex: 1;
      overflow-y: auto;
      padding: 28px 24px 20px;
      display: flex;
      flex-direction: column;
    }

    /* Drawer close button */
    .drawer-close {
      position: absolute;
      top: 14px;
      right: 14px;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid var(--border);
      background: var(--surface);
      cursor: pointer;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
      z-index: 10;
      color: var(--text-secondary);
    }

    .drawer-close:hover {
      background: rgba(239,68,68,0.15);
      color: var(--danger);
      border-color: var(--danger);
    }

    /* ========== Header ========== */
    .header {
      text-align: center;
      margin-bottom: 24px;
    }

    .header h1 {
      font-size: 1.6rem;
      font-weight: 600;
      color: var(--text);
      letter-spacing: -0.02em;
    }

    .header .subtitle {
      font-size: 0.8rem;
      color: var(--text-tertiary);
      margin-top: 2px;
    }

    /* ========== Share Bar ========== */
    .share-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 16px;
      padding: 8px 12px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.76rem;
    }

    .share-bar .sync-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      flex-shrink: 0;
      background: var(--success);
      animation: pulse 2s infinite;
    }

    .share-bar .sync-dot.syncing { background: var(--warning); }
    .share-bar .sync-dot.error { background: var(--danger); animation: none; }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    .share-bar .sync-text {
      flex: 1;
      color: var(--text-secondary);
    }

    .btn-share {
      background: var(--accent);
      color: #fff;
      border: none;
      padding: 5px 10px;
      border-radius: 4px;
      font-size: 0.72rem;
      cursor: pointer;
      white-space: nowrap;
    }
    .btn-share:hover { background: var(--accent-hover); }
    .btn-share.copied { background: var(--success); }

    /* ========== Input Section ========== */
    .input-section {
      display: flex;
      gap: 8px;
      margin-bottom: 16px;
    }

    .input-section input {
      flex: 1;
      padding: 10px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      outline: none;
      transition: var(--transition);
      background: rgba(255,255,255,0.04);
      color: var(--text);
      font-family: inherit;
    }

    .input-section input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-soft);
      background: rgba(255,255,255,0.06);
    }

    .input-section input::placeholder {
      color: var(--text-tertiary);
    }

    .btn {
      padding: 9px 16px;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 0.84rem;
      font-weight: 500;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .btn:active { transform: scale(0.97); }

    .btn-primary {
      background: var(--accent);
      color: #fff;
    }
    .btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 0 4px var(--accent-soft); }
    .btn-primary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

    .btn-danger {
      background: transparent;
      color: var(--danger);
      padding: 6px 10px;
      font-size: 0.78rem;
      border-radius: var(--radius-sm);
    }
    .btn-danger:hover { background: rgba(239,68,68,0.1); }

    .btn-clear {
      background: transparent;
      color: var(--text-tertiary);
      font-size: 0.76rem;
      padding: 4px 8px;
      font-weight: 500;
      border-radius: var(--radius-sm);
    }
    .btn-clear:hover { color: var(--text-secondary); }

    /* ========== Filter Section ========== */
    .filter-section {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
      flex-wrap: wrap;
      gap: 6px;
    }

    .filters {
      display: flex;
      gap: 2px;
      background: var(--surface);
      border-radius: var(--radius-sm);
      padding: 3px;
      border: 1px solid var(--border);
    }

    .filter-btn {
      padding: 6px 14px;
      border: none;
      background: transparent;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 500;
      cursor: pointer;
      transition: var(--transition);
      color: var(--text-secondary);
    }

    .filter-btn.active {
      background: var(--surface-hover);
      color: var(--text);
      box-shadow: 0 1px 2px rgba(0,0,0,0.3);
    }

    .filter-btn:hover:not(.active) { color: var(--text); }

    /* ========== Todo List ========== */
    .todo-list {
      list-style: none;
      min-height: 40px;
      flex: 1;
    }

    .todo-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      animation: slideIn 0.3s ease;
      border: 1px solid transparent;
    }

    .todo-item:hover {
      background: var(--surface-hover);
      border-color: var(--border);
    }

    @keyframes slideIn {
      from { opacity: 0; transform: translateX(-12px); }
      to   { opacity: 1; transform: translateX(0); }
    }

    @keyframes slideOut {
      from { opacity: 1; transform: translateX(0); max-height: 60px; }
      to   { opacity: 0; transform: translateX(40px); max-height: 0; padding: 0; margin: 0; }
    }

    .todo-item.removing {
      animation: slideOut 0.3s ease forwards;
    }

    /* Custom checkbox */
    .todo-checkbox {
      appearance: none;
      -webkit-appearance: none;
      width: 20px;
      height: 20px;
      border: 1.5px solid rgba(255,255,255,0.15);
      border-radius: 50%;
      cursor: pointer;
      flex-shrink: 0;
      transition: var(--transition);
      position: relative;
      background: transparent;
    }

    .todo-checkbox:hover { border-color: var(--accent); }

    .todo-checkbox:checked {
      background: var(--success);
      border-color: var(--success);
    }

    .todo-checkbox:checked::after {
      content: '';
      position: absolute;
      top: 2px;
      left: 5px;
      width: 5px;
      height: 9px;
      border: solid #fff;
      border-width: 0 2px 2px 0;
      transform: rotate(45deg);
    }

    .todo-text {
      flex: 1;
      font-size: 0.88rem;
      word-break: break-word;
      cursor: default;
      transition: var(--transition);
      color: var(--text);
    }

    .todo-item.completed .todo-text {
      text-decoration: line-through;
      color: var(--text-tertiary);
    }

    /* ========== Link Detection ========== */
    .todo-text a.safe-link {
      color: var(--accent);
      text-decoration: underline;
      text-underline-offset: 2px;
    }
    .todo-text a.safe-link:hover { color: var(--accent-hover); }

    .danger-link {
      color: var(--danger);
      text-decoration: line-through;
      cursor: not-allowed;
      opacity: 0.7;
    }
    .danger-link .warn-icon { font-size: 0.85em; }

    /* Edit mode */
    .todo-edit-input {
      flex: 1;
      font-size: 0.88rem;
      padding: 5px 8px;
      border: 1px solid var(--accent);
      border-radius: var(--radius-sm);
      outline: none;
      background: rgba(255,255,255,0.06);
      color: var(--text);
      font-family: inherit;
    }

    .btn-delete {
      background: none;
      border: none;
      cursor: pointer;
      color: var(--text-tertiary);
      font-size: 1rem;
      padding: 3px 5px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      flex-shrink: 0;
      line-height: 1;
      opacity: 0;
    }

    .todo-item:hover .btn-delete { opacity: 1; }

    .btn-delete:hover {
      color: var(--danger);
      background: rgba(239,68,68,0.1);
    }

    /* ========== Footer ========== */
    .footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 16px;
      padding-top: 12px;
      border-top: 1px solid var(--border);
      font-size: 0.8rem;
      color: var(--text-tertiary);
    }

    .footer .count strong {
      color: var(--accent);
      font-weight: 600;
    }

    /* ========== Empty State ========== */
    .empty-state {
      text-align: center;
      padding: 28px 12px;
      color: var(--text-tertiary);
    }

    .empty-state .icon {
      font-size: 2.5rem;
      margin-bottom: 10px;
      opacity: 0.5;
    }

    .empty-state p {
      font-size: 0.85rem;
    }

    /* ========== Admin ========== */
    .admin-badge {
      display: none;
      font-size: 0.65rem;
      background: var(--danger);
      color: #fff;
      padding: 2px 8px;
      border-radius: 10px;
      margin-left: 6px;
      vertical-align: middle;
    }
    .admin-active .admin-badge { display: inline; }

    .admin-entry {
      background: none;
      border: none;
      font-size: 1rem;
      cursor: pointer;
      opacity: 0.3;
      transition: var(--transition);
      position: absolute;
      top: 10px;
      right: 44px;
    }
    .admin-entry:hover { opacity: 0.8; }

    /* Context Menu */
    .context-menu {
      position: fixed;
      background: #1a1a1e;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      padding: 6px 0;
      z-index: 9999;
      min-width: 160px;
      animation: ctxFadeIn 0.15s ease;
      display: none;
    }
    @keyframes ctxFadeIn {
      from { opacity: 0; transform: scale(0.94); }
      to { opacity: 1; transform: scale(1); }
    }
    @keyframes fadeIn {
      from { opacity: 0; transform: scale(0.92); }
      to { opacity: 1; transform: scale(1); }
    }
    .context-menu .menu-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 16px;
      cursor: pointer;
      font-size: 0.88rem;
      border: none;
      background: none;
      width: 100%;
      text-align: left;
      color: var(--text);
      transition: 0.12s;
    }
    .context-menu .menu-item:hover { background: var(--surface-hover); }
    .context-menu .menu-item.danger { color: var(--danger); }
    .context-menu .menu-item.danger:hover { background: rgba(239,68,68,0.1); }
    .context-menu .menu-divider {
      height: 1px;
      background: var(--border);
      margin: 4px 0;
    }

    /* ===== Scrollbar ===== */
    ::-webkit-scrollbar { width: 5px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
    ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }
    .drawer-inner { scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.08) transparent; }

    /* ===== L2 Animations ===== */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(16px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    .music-player {
      animation: fadeInUp 0.5s ease;
    }

    .reveal {
      opacity: 0;
      transform: translateY(12px);
      transition: opacity 0.5s ease, transform 0.5s ease;
    }
    .reveal.revealed { opacity: 1; transform: translateY(0); }

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

    /* ===== Responsive ===== */
    @media (max-width: 600px) {
      .todo-drawer, .music-drawer {
        width: 100%;
        max-width: 100vw;
        border-radius: 0;
        border-right: none;
        border-left: none;
      }
      .music-player { padding: 16px; }
      .input-section { flex-direction: column; }
      .btn-primary { justify-content: center; }
      .filter-section { flex-direction: column; align-items: stretch; }
      .filters { justify-content: center; }
    }

    /* ========== Wallpaper Toggle (Top Right) ========== */
    .wallpaper-toggle {
      position: fixed;
      top: 20px;
      right: 20px;
      z-index: 1000;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.06);
      cursor: pointer;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.25s ease;
      color: #fff;
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    .wallpaper-toggle:hover {
      background: rgba(255,255,255,0.14);
      transform: scale(1.1);
      box-shadow: 0 4px 16px rgba(0,0,0,0.3);
    }

    /* ========== Wallpaper Overlay ========== */
    .wallpaper-overlay {
      position: fixed;
      inset: 0;
      z-index: 3000;
      background: rgba(0,0,0,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.35s ease, visibility 0.35s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 40px;
    }
    .wallpaper-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    .wallpaper-panel {
      background: rgba(20,20,24,0.98);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 16px;
      width: 100%;
      max-width: 720px;
      max-height: 80vh;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      box-shadow: 0 16px 48px rgba(0,0,0,0.6);
      animation: panelIn 0.3s ease;
    }
    @keyframes panelIn {
      from { opacity: 0; transform: translateY(20px) scale(0.96); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }

    .wp-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px 0;
    }
    .wp-header h2 {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--text);
    }
    .wp-close {
      width: 32px; height: 32px;
      border-radius: 50%;
      border: 1px solid var(--border);
      background: var(--surface);
      cursor: pointer;
      font-size: 0.9rem;
      display: flex; align-items: center; justify-content: center;
      color: var(--text-secondary);
      transition: var(--transition);
    }
    .wp-close:hover {
      background: rgba(239,68,68,0.15);
      color: var(--danger);
      border-color: var(--danger);
    }

    .wp-body {
      padding: 20px 24px 24px;
      overflow-y: auto;
      flex: 1;
    }

    /* Upload Zone */
    .wp-upload-zone {
      border: 2px dashed rgba(255,255,255,0.12);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      cursor: pointer;
      transition: all 0.25s ease;
      margin-bottom: 20px;
    }
    .wp-upload-zone:hover,
    .wp-upload-zone.dragover {
      border-color: var(--accent);
      background: rgba(var(--accent-rgb), 0.06);
    }
    .wp-upload-zone .upload-icon {
      font-size: 2rem;
      margin-bottom: 6px;
    }
    .wp-upload-zone .upload-text {
      color: rgba(255,255,255,0.5);
      font-size: 0.82rem;
    }
    .wp-upload-zone .upload-hint {
      color: rgba(255,255,255,0.25);
      font-size: 0.7rem;
      margin-top: 4px;
    }

    /* Wallpaper Grid */
    .wp-section-title {
      font-size: 0.8rem;
      font-weight: 600;
      color: rgba(255,255,255,0.4);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 10px;
    }
    .wp-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
      gap: 12px;
      margin-bottom: 20px;
    }
    .wp-card {
      position: relative;
      border-radius: 10px;
      overflow: hidden;
      aspect-ratio: 16/10;
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.2s ease;
      background: rgba(255,255,255,0.04);
    }
    .wp-card:hover {
      border-color: rgba(255,255,255,0.2);
      transform: translateY(-2px);
    }
    .wp-card.active {
      border-color: var(--accent);
      box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.4);
    }
    .wp-card.active::after {
      content: '✓';
      position: absolute;
      top: 8px;
      right: 8px;
      width: 22px; height: 22px;
      border-radius: 50%;
      background: var(--accent);
      color: #fff;
      font-size: 0.7rem;
      display: flex; align-items: center; justify-content: center;
      font-weight: 700;
    }
    .wp-card .wp-thumb {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .wp-card .wp-card-label {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 6px 8px;
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      font-size: 0.72rem;
      color: #fff;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .wp-card .wp-card-badge {
      position: absolute;
      top: 6px;
      left: 6px;
      font-size: 0.6rem;
      padding: 2px 6px;
      border-radius: 4px;
      background: rgba(0,0,0,0.5);
      color: rgba(255,255,255,0.7);
    }
    .wp-card .wp-delete-btn {
      position: absolute;
      top: 6px;
      right: 6px;
      width: 24px; height: 24px;
      border-radius: 50%;
      border: none;
      background: rgba(0,0,0,0.5);
      color: #fff;
      font-size: 0.7rem;
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      opacity: 0;
      transition: opacity 0.2s;
    }
    .wp-card:hover .wp-delete-btn {
      opacity: 1;
    }
    .wp-card .wp-delete-btn:hover {
      background: var(--danger);
    }

    /* Background Image (for static wallpapers) */
    #bgImage {
      position: fixed;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      display: none;
    }
    #bgVideo.hidden { display: none; }