:root {
      --bg: #f8f8fa;
      --surface: #ffffff;
      --surface2: #f1f1f4;
      --border: #e4e4e9;
      --text: #1a1a1c;
      --muted: #6c6c72;
      --accent: #c8f135;
      --accent-dim: #b0d42e;
      --danger: #ff4545;
      --unread-glow: rgba(0,0,0,0.03);
    }
    * { box-sizing: border-box; }
    html, body {
      margin: 0; padding: 0;
      background: var(--bg);
      color: var(--text);
      font-family: 'Syne', sans-serif;
      min-height: 100vh;
    }
    .mono { font-family: 'DM Mono', monospace; }
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.02'/%3E%3C/svg%3E");
      pointer-events: none;
      z-index: 9999;
      opacity: 0.2;
    }
    .page {
      display: none;
      opacity: 0;
      transform: translateY(12px) scale(0.98);
      transition: opacity 0.35s cubic-bezier(0.2, 0.9, 0.4, 1.1), transform 0.35s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    }
    .page.active {
      display: block;
      opacity: 1;
      transform: translateY(0) scale(1);
    }
    .tab-content {
      transition: opacity 0.25s ease, transform 0.25s ease;
      opacity: 0;
      transform: translateX(8px);
    }
    .tab-content.active {
      opacity: 1;
      transform: translateX(0);
    }
    .inp {
      width: 100%;
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--text);
      padding: 12px 16px;
      font-family: 'DM Mono', monospace;
      font-size: 14px;
      outline: none;
      border-radius: 6px;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .inp:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(200,241,53,0.2); }
    .inp::placeholder { color: var(--muted); }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      font-family: 'Syne', sans-serif;
      font-weight: 600;
      font-size: 14px;
      border: none;
      cursor: pointer;
      transition: all 0.2s cubic-bezier(0.2, 0.9, 0.4, 1.1);
      border-radius: 6px;
      letter-spacing: 0.02em;
    }
    .btn-accent {
      background: var(--accent);
      color: #0a0a0a;
      box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    }
    .btn-accent:hover { background: var(--accent-dim); transform: translateY(-2px); box-shadow: 0 6px 12px rgba(0,0,0,0.08); }
    .btn-accent:active { transform: translateY(1px); }
    .btn-ghost {
      background: transparent;
      color: var(--muted);
      border: 1px solid var(--border);
    }
    .btn-ghost:hover { border-color: var(--text); color: var(--text); transform: translateY(-1px); background: rgba(0,0,0,0.02); }
    .btn-danger {
      background: transparent;
      color: var(--danger);
      border: 1px solid var(--danger);
    }
    .btn-danger:hover { background: var(--danger); color: white; transform: translateY(-1px); }
    .nav-link {
      padding: 8px 16px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--muted);
      cursor: pointer;
      border-radius: 4px;
      transition: all 0.15s;
    }
    .nav-link:hover { color: var(--text); background: rgba(0,0,0,0.03); }
    .nav-link.active {
      color: var(--text);
      background: var(--surface2);
      box-shadow: inset 2px 2px 5px rgba(0, 0, 0, 0.08), inset -1px -1px 2px rgba(255, 255, 255, 0.8);
    }
    .msg-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 18px 20px;
      position: relative;
      overflow: hidden;
      transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
      cursor: pointer;
      animation: fadeUp 0.35s ease forwards;
      opacity: 0;
      box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    }
    .msg-card.unread {
      border-left: 3px solid var(--accent);
      background: #ffffff;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
    }
    .msg-card.unread .new-message-badge {
      display: inline-block;
      background: var(--accent);
      color: #0a0a0a;
      font-size: 10px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 20px;
      letter-spacing: 0.5px;
      margin-bottom: 8px;
    }
    .msg-card.read {
      opacity: 0.92;
      border-left-color: transparent;
    }
    .msg-card:hover {
      transform: translateY(-4px);
      border-color: #cdcdd4;
      box-shadow: 0 12px 22px rgba(0,0,0,0.08);
    }
    .msg-card::before {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: 12px;
      padding: 1px;
      background: linear-gradient(120deg, transparent, rgba(200,241,53,0.3), transparent);
      -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
      -webkit-mask-composite: xor;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.35s;
    }
    .msg-card:hover::before { opacity: 1; }
    .link-box {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 16px 20px;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    }
    .link-box:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: 0 6px 12px rgba(0,0,0,0.05); }
    #toast {
      position: fixed;
      bottom: 24px;
      right: 24px;
      z-index: 1000;
      padding: 12px 20px;
      border-radius: 8px;
      font-size: 13px;
      font-family: 'DM Mono', monospace;
      transform: translateY(80px);
      opacity: 0;
      transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
      max-width: 320px;
    }
    #toast.show { transform: translateY(0); opacity: 1; }
    #toast.success { background: var(--accent); color: #0a0a0a; }
    #toast.error { background: var(--danger); color: white; }
    .send-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 40px;
      max-width: 480px;
      width: 100%;
      transition: transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 8px 20px rgba(0,0,0,0.04);
    }
    .send-card:hover { box-shadow: 0 20px 30px -8px rgba(0,0,0,0.1); }
    .logo {
      font-family: 'Syne', sans-serif;
      font-weight: 800;
      font-size: 22px;
      letter-spacing: -0.03em;
      color: var(--accent);
    }
    .logo span { color: var(--muted); font-weight: 400; }
    .dot {
      width: 6px; height: 6px;
      background: var(--accent);
      border-radius: 50%;
      display: inline-block;
    }
    .empty {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 12px;
      padding: 60px 20px;
      color: var(--muted);
      text-align: center;
      animation: fadeUp 0.4s ease;
    }
    .spin {
      width: 18px; height: 18px;
      border: 2px solid rgba(0,0,0,0.1);
      border-top-color: currentColor;
      border-radius: 50%;
      animation: spin 0.6s linear infinite;
    }
    @keyframes spin { to { transform: rotate(360deg); } }
    textarea.inp { resize: none; line-height: 1.6; }
    .char-count { font-size: 11px; color: var(--muted); font-family: 'DM Mono', monospace; transition: color 0.2s; }
    .char-count.warn { color: #f97316; }
    .char-count.danger { color: var(--danger); }
    .tab-bar { display: flex; border-bottom: 1px solid var(--border); gap: 0; }
    .tab {
      padding: 12px 20px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--muted);
      cursor: pointer;
      border-bottom: 2px solid transparent;
      margin-bottom: -1px;
      transition: all 0.2s;
    }
    .tab:hover { color: var(--text); background: rgba(0,0,0,0.02); }
    .tab.active {
      color: var(--text);
      border-bottom-color: transparent;
      background: var(--surface2);
      box-shadow: inset 2px 2px 5px rgba(0, 0, 0, 0.08);
      border-radius: 6px;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 18px;
      height: 18px;
      padding: 0 5px;
      background: var(--accent);
      color: #0a0a0a;
      font-size: 10px;
      font-weight: 700;
      border-radius: 9px;
      font-family: 'DM Mono', monospace;
    }
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(16px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .fade-up { animation: fadeUp 0.35s ease forwards; }
    #msg-viewer {
      opacity: 0;
      transform: scale(0.96);
      transition: opacity 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1), transform 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
      backdrop-filter: blur(24px);
      background: rgba(255,255,255,0.92);
      will-change: transform, opacity;
      pointer-events: none;
    }
    #msg-viewer.show {
      opacity: 1;
      transform: scale(1);
      pointer-events: auto;
    }
    #modal-backdrop {
      transition: opacity 0.25s ease;
      opacity: 0;
      pointer-events: none;
    }
    #modal-backdrop.show { opacity: 1; pointer-events: auto; }
    .modal-container {
      transition: opacity 0.25s ease, transform 0.25s ease;
      opacity: 0;
      transform: scale(0.95);
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      margin: auto;
      height: fit-content;
      pointer-events: none;
    }
    .modal-container.show {
      opacity: 1;
      transform: scale(1);
      pointer-events: auto;
    }
    .scroll-top {
      position: fixed;
      bottom: 24px;
      left: 24px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 40px;
      padding: 10px 14px;
      cursor: pointer;
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.25s;
      pointer-events: none;
      z-index: 90;
      box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    }
    .scroll-top.visible {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }
    .scroll-top:hover {
      border-color: var(--accent);
      background: var(--surface2);
    }
    .logo-glow {
      position: relative;
      display: inline-block;
      background: linear-gradient(90deg, var(--accent) 0%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      overflow: hidden;
    }
    .logo-glow::after {
      content: "";
      position: absolute;
      top: 0;
      left: -150%;
      width: 50%;
      height: 100%;
      background: linear-gradient(120deg, transparent 0%, rgba(255,255,255,0.8) 50%, transparent 100%);
      transform: skewX(-20deg);
      animation: shimmer 2.5s infinite;
    }
    @keyframes shimmer {
      0% { left: -150%; }
      100% { left: 200%; }
    }
    @keyframes shimmer-sweep {
      0% { background-position: -200% 0; }
      100% { background-position: 200% 0; }
    }
    .shimmer-logo {
      color: var(--accent);
      background: linear-gradient(120deg, var(--accent) 30%, rgba(255, 255, 255, 0.8) 50%, var(--accent) 70%);
      background-size: 200% 100%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: shimmer-sweep 2.5s infinite linear;
      text-shadow: 0 0 8px rgba(200, 241, 53, 0.2);
      display: inline-block;
    }
    .shimmer-logo span {
      -webkit-text-fill-color: var(--muted);
    }
    .vn-recorder {
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 16px;
      background: var(--surface2);
      margin-bottom: 12px;
    }
    .vn-btn-record {
      width: 52px; height: 52px;
      border-radius: 50%;
      border: none;
      background: var(--surface);
      border: 2px solid var(--border);
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s;
      flex-shrink: 0;
    }
    .vn-btn-record:hover { border-color: var(--danger); }
    .vn-btn-record.recording {
      background: var(--danger);
      border-color: var(--danger);
      animation: pulse-rec 1.2s ease infinite;
    }
    @keyframes pulse-rec {
      0%, 100% { box-shadow: 0 0 0 0 rgba(255,69,69,0.4); }
      50% { box-shadow: 0 0 0 8px rgba(255,69,69,0); }
    }
    .vn-timer {
      font-family: 'DM Mono', monospace;
      font-size: 13px;
      color: var(--muted);
      min-width: 36px;
    }
    .vn-timer.active { color: var(--danger); }
    .vn-preview {
      display: flex;
      align-items: center;
      gap: 10px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 10px 14px;
      margin-top: 10px;
    }
    .vn-play-btn {
      width: 32px; height: 32px;
      border-radius: 50%;
      border: none;
      background: var(--text);
      color: var(--surface);
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
      transition: background 0.15s;
    }
    .vn-play-btn:hover { background: var(--accent); color: #0a0a0a; }
    .vn-progress-wrap {
      flex: 1;
      height: 3px;
      background: var(--border);
      border-radius: 2px;
      cursor: pointer;
      position: relative;
    }
    .vn-progress-bar {
      height: 100%;
      background: var(--accent);
      border-radius: 2px;
      width: 0%;
      transition: width 0.1s linear;
    }
    .vn-duration {
      font-family: 'DM Mono', monospace;
      font-size: 11px;
      color: var(--muted);
      flex-shrink: 0;
    }
    .msg-audio-player {
      display: flex;
      align-items: center;
      gap: 10px;
      background: var(--surface2);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 10px 14px;
      margin-top: 10px;
    }
    .msg-play-btn {
      width: 30px; height: 30px;
      border-radius: 50%;
      border: none;
      background: var(--text);
      color: var(--surface);
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
      transition: background 0.15s;
    }
    .msg-play-btn:hover { background: var(--accent); color: #0a0a0a; }
    .msg-audio-icon {
      display: flex; align-items: center; justify-content: center;
      width: 28px; height: 28px;
      border-radius: 50%;
      background: rgba(200,241,53,0.12);
      flex-shrink: 0;
    }