:root {
      --c2-bg: #0a0a0f;
      --c2-surface: #12121a;
      --c2-card: #16161f;
      --c2-card-hover: #1c1c2a;
      --c2-border: #2a2a3a;
      --c2-border-active: #ff2a2a;
      --c2-green: #00ff41;
      --c2-green-dim: rgba(0,255,65,0.3);
      --c2-red: #ff0000;
      --c2-red-dim: rgba(255,0,0,0.15);
      --c2-orange: #ff8800;
      --c2-blue: #0088ff;
      --c2-text: #c8c8d0;
      --c2-text-dim: #6a6a7a;
      --c2-font: 'Inter', system-ui, -apple-system, sans-serif;
      --c2-mono: 'Fira Code', 'Cascadia Code', monospace;
      --safe-bottom: env(safe-area-inset-bottom, 0px);
      --safe-top: env(safe-area-inset-top, 0px);
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { font-size: 16px; -webkit-text-size-adjust: 100%; }
    body {
      background: var(--c2-bg);
      color: var(--c2-text);
      font-family: var(--c2-font);
      line-height: 1.5;
      min-height: 100vh;
      min-height: 100dvh;
      padding-top: 56px;
      padding-bottom: calc(70px + var(--safe-bottom));
      overflow-x: hidden;
    }
    body::after {
      content: '';
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 9998;
      background: repeating-linear-gradient(0deg,
        transparent, transparent 2px,
        rgba(0,255,65,0.012) 2px, rgba(0,255,65,0.012) 4px);
    }
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 9997;
      background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.6) 100%);
    }
    ::-webkit-scrollbar { width: 4px; height: 4px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { background: var(--c2-border); border-radius: 4px; }
    ::-webkit-scrollbar-thumb:hover { background: var(--c2-text-dim); }
    ::selection { background: var(--c2-red-dim); color: var(--c2-green); }

    /* ── Top Bar ── */
    .c2-topbar {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 9999;
      height: 56px;
      background: rgba(10,10,15,0.92);
      backdrop-filter: blur(20px) saturate(1.4);
      -webkit-backdrop-filter: blur(20px) saturate(1.4);
      border-bottom: 1px solid var(--c2-border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 12px;
      padding-top: var(--safe-top);
    }
    .c2-topbar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--c2-green);
      font-weight: 700;
      font-size: 0.95rem;
    }
    .c2-topbar-brand img {
      width: 28px; height: 28px;
      border-radius: 6px;
      border: 1px solid var(--c2-green-dim);
    }
    .c2-topbar-brand .brand-tag {
      font-size: 0.6rem;
      color: var(--c2-red);
      background: var(--c2-red-dim);
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 800;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-left: 4px;
    }
    .c2-topbar-right {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .c2-topbar-right .user-badge {
      font-size: 0.7rem;
      color: var(--c2-text-dim);
      font-family: var(--c2-mono);
      max-width: 120px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .c2-topbar-right .user-badge i { color: var(--c2-green); margin-right: 4px; }
    .c2-btn-icon {
      width: 36px; height: 36px;
      border-radius: 10px;
      border: 1px solid var(--c2-border);
      background: var(--c2-surface);
      color: var(--c2-text);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 0.95rem;
      transition: all 0.2s;
      flex-shrink: 0;
      -webkit-tap-highlight-color: transparent;
    }
    .c2-btn-icon:hover, .c2-btn-icon:active {
      border-color: var(--c2-green-dim);
      color: var(--c2-green);
      background: rgba(0,255,65,0.05);
    }
    .c2-btn-icon.logout { color: var(--c2-red); }
    .c2-btn-icon.logout:hover, .c2-btn-icon.logout:active {
      border-color: var(--c2-red-dim);
      background: var(--c2-red-dim);
    }

    /* ── Hamburger ── */
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 4px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
      -webkit-tap-highlight-color: transparent;
    }
    .hamburger span {
      display: block;
      width: 22px; height: 2px;
      background: var(--c2-green);
      border-radius: 2px;
      transition: all 0.3s;
    }
    .hamburger.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 56px; left: 0; right: 0;
      bottom: 0;
      z-index: 9998;
      background: rgba(10,10,15,0.96);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      padding: 20px 16px 40px;
      overflow-y: auto;
      flex-direction: column;
      gap: 6px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 14px;
      background: var(--c2-card);
      border: 1px solid var(--c2-border);
      border-radius: 12px;
      color: var(--c2-text);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.85rem;
      transition: all 0.2s;
    }
    .mobile-menu a i { width: 20px; text-align: center; color: var(--c2-green); font-size: 1rem; }
    .mobile-menu a:hover, .mobile-menu a:active { border-color: var(--c2-green-dim); background: var(--c2-card-hover); }
    .mobile-menu .menu-label {
      font-size: 0.65rem;
      color: var(--c2-text-dim);
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 10px 4px 4px;
      font-weight: 600;
    }

    /* ── Command Bar ── */
    .cmd-bar {
      background: var(--c2-surface);
      border-bottom: 1px solid var(--c2-border);
      padding: 10px 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .cmd-bar .cmd-prompt {
      font-family: var(--c2-mono);
      font-size: 0.75rem;
      color: var(--c2-green);
      white-space: nowrap;
      font-weight: 600;
    }
    .cmd-bar .cmd-prompt .c2-user { color: var(--c2-orange); }
    .cmd-bar input {
      flex: 1;
      background: var(--c2-bg);
      border: 1px solid var(--c2-border);
      border-radius: 8px;
      padding: 8px 12px;
      font-family: var(--c2-mono);
      font-size: 0.8rem;
      color: var(--c2-green);
      outline: none;
      transition: border-color 0.2s;
      min-height: 38px;
    }
    .cmd-bar input:focus { border-color: var(--c2-green-dim); }
    .cmd-bar input::placeholder { color: var(--c2-text-dim); font-family: var(--c2-font); }
    .cmd-bar .cmd-hint { font-size: 0.65rem; color: var(--c2-text-dim); display: none; }
    @media (min-width: 768px) { .cmd-bar .cmd-hint { display: block; } }

    /* ── Container ── */
    .c2-container { max-width: 1400px; margin: 0 auto; padding: 12px; }

    /* ── Status Bar ── */
    .c2-status-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      padding: 8px 0 4px;
      margin-bottom: 8px;
    }
    .c2-status-item {
      font-size: 0.6rem;
      font-weight: 600;
      font-family: var(--c2-mono);
      padding: 4px 8px;
      border-radius: 20px;
      background: var(--c2-card);
      border: 1px solid var(--c2-border);
      display: flex;
      align-items: center;
      gap: 4px;
      color: var(--c2-text-dim);
    }
    .c2-status-item .dot {
      width: 6px; height: 6px;
      border-radius: 50%;
      display: inline-block;
    }
    .c2-status-item .dot.green { background: var(--c2-green); box-shadow: 0 0 6px var(--c2-green); }
    .c2-status-item .dot.orange { background: var(--c2-orange); box-shadow: 0 0 6px var(--c2-orange); }

    /* ── Section Title ── */
    .c2-section-title {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 16px 0 10px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--c2-text);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .c2-section-title i { color: var(--c2-red); font-size: 0.9rem; }
    .c2-section-title::after {
      content: '';
      flex: 1;
      height: 1px;
      background: linear-gradient(to right, var(--c2-border), transparent);
    }
    .c2-section-title .count {
      font-family: var(--c2-mono);
      font-size: 0.7rem;
      color: var(--c2-text-dim);
      background: var(--c2-card);
      padding: 2px 8px;
      border-radius: 10px;
      border: 1px solid var(--c2-border);
    }

    /* ── Tools Grid ── */
    .c2-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 10px;
    }
    @media (min-width: 600px) { .c2-grid { grid-template-columns: 1fr 1fr; gap: 12px; } }
    @media (min-width: 1024px) { .c2-grid { grid-template-columns: 1fr 1fr 1fr; gap: 14px; } }
    @media (min-width: 1400px) { .c2-grid { grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px; } }

    /* ── Tool Card ── */
    .c2-card {
      background: var(--c2-card);
      border: 1px solid var(--c2-border);
      border-radius: 14px;
      overflow: hidden;
      transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
    }
    .c2-card-header {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 12px 0;
      cursor: pointer;
      -webkit-tap-highlight-color: transparent;
      user-select: none;
    }
    .c2-card-header .card-icon {
      width: 34px; height: 34px;
      border-radius: 10px;
      background: var(--c2-red-dim);
      border: 1px solid rgba(255,0,0,0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      color: var(--c2-red);
      flex-shrink: 0;
    }
    .c2-card-header .card-info { flex: 1; min-width: 0; }
    .c2-card-header .card-info h3 {
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--c2-green);
      line-height: 1.3;
    }
    .c2-card-header .card-info .card-sub {
      font-size: 0.62rem;
      color: var(--c2-text-dim);
      font-weight: 500;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .c2-card-header .card-toggle {
      width: 26px; height: 26px;
      border-radius: 8px;
      border: 1px solid var(--c2-border);
      background: transparent;
      color: var(--c2-text-dim);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.7rem;
      cursor: pointer;
      transition: all 0.3s;
      flex-shrink: 0;
    }
    .c2-card-header .card-toggle.open { transform: rotate(180deg); color: var(--c2-green); border-color: var(--c2-green-dim); }
    .c2-card-body {
      padding: 0 12px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0.4,0,0.2,1), padding 0.35s ease;
    }
    .c2-card-body.open {
      max-height: 600px;
      padding: 12px;
    }
    .c2-card-body.expanded { max-height: none; padding: 12px; }

    /* ── Form Elements ── */
    .c2-label {
      display: block;
      font-size: 0.65rem;
      font-weight: 600;
      color: var(--c2-text-dim);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 4px;
    }
    .c2-input {
      width: 100%;
      background: var(--c2-bg);
      border: 1px solid var(--c2-border);
      border-radius: 9px;
      padding: 9px 11px;
      font-family: var(--c2-mono);
      font-size: 0.82rem;
      color: var(--c2-green);
      outline: none;
      transition: border-color 0.2s;
      min-height: 40px;
      -webkit-appearance: none;
      appearance: none;
    }
    .c2-input:focus { border-color: var(--c2-red); }
    .c2-input::placeholder { color: var(--c2-text-dim); font-family: var(--c2-font); }
    select.c2-input {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%236a6a7a' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 12px center;
      padding-right: 30px;
      cursor: pointer;
      color: var(--c2-text);
    }
    select.c2-input option { background: var(--c2-surface); color: var(--c2-text); }
    .c2-input-group { display: flex; gap: 8px; flex-wrap: wrap; }
    .c2-input-group .c2-input { flex: 1; min-width: 120px; }

    .c2-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      background: var(--c2-red);
      color: #fff;
      border: none;
      padding: 9px 16px;
      border-radius: 10px;
      font-weight: 700;
      font-size: 0.78rem;
      font-family: inherit;
      cursor: pointer;
      transition: all 0.25s;
      min-height: 40px;
      white-space: nowrap;
      -webkit-tap-highlight-color: transparent;
    }
    .c2-btn:active { transform: scale(0.96); }
    .c2-btn:hover { filter: brightness(1.15); box-shadow: 0 4px 20px rgba(255,0,0,0.3); }
    .c2-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; }
    .c2-btn-outline {
      background: transparent;
      border: 1px solid var(--c2-border);
      color: var(--c2-text);
    }
    .c2-btn-outline:hover { border-color: var(--c2-green-dim); color: var(--c2-green); box-shadow: none; }
    .c2-btn-sm { padding: 6px 12px; font-size: 0.72rem; min-height: 34px; }

    .c2-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 0.62rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 20px;
      text-transform: uppercase;
      letter-spacing: 0.3px;
      font-family: var(--c2-mono);
    }
    .c2-badge.idle { background: rgba(0,255,65,0.08); color: var(--c2-green-dim); border: 1px solid rgba(0,255,65,0.15); }
    .c2-badge.running { background: rgba(255,136,0,0.1); color: var(--c2-orange); border: 1px solid rgba(255,136,0,0.25); animation: pulse 1s infinite; }
    .c2-badge.done { background: rgba(0,255,65,0.12); color: var(--c2-green); border: 1px solid rgba(0,255,65,0.25); }
    .c2-badge.error { background: rgba(255,0,0,0.12); color: var(--c2-red); border: 1px solid rgba(255,0,0,0.25); }
    @keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

    /* ── Terminal Output ── */
    .c2-terminal {
      background: #050508;
      border: 1px solid var(--c2-border);
      border-radius: 9px;
      padding: 9px;
      margin-top: 9px;
      font-family: var(--c2-mono);
      font-size: 0.7rem;
      line-height: 1.5;
      max-height: 180px;
      overflow-y: auto;
      white-space: pre-wrap;
      word-break: break-all;
    }
    .c2-terminal .line { display: block; }
    .c2-terminal .prompt { color: var(--c2-green); }
    .c2-terminal .info { color: var(--c2-blue); }
    .c2-terminal .success { color: var(--c2-green); }
    .c2-terminal .warn { color: var(--c2-orange); }
    .c2-terminal .error { color: var(--c2-red); }
    .c2-terminal .dim { color: var(--c2-text-dim); }

    /* ── PW Generator ── */
    .pw-options { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin: 8px 0; }
    .pw-opt { display: flex; align-items: center; gap: 6px; font-size: 0.75rem; color: var(--c2-text); cursor: pointer; }
    .pw-opt input[type="checkbox"] {
      -webkit-appearance: none; appearance: none;
      width: 17px; height: 17px;
      background: var(--c2-bg); border: 1px solid var(--c2-border);
      border-radius: 4px; cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      transition: all 0.2s; flex-shrink: 0;
    }
    .pw-opt input[type="checkbox"]:checked { background: var(--c2-red); border-color: var(--c2-red); }
    .pw-opt input[type="checkbox"]:checked::after { content: '✓'; color: #fff; font-size: 0.6rem; font-weight: 700; }
    .pw-length-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
    .pw-length-row input[type="range"] {
      flex: 1; -webkit-appearance: none; appearance: none;
      height: 5px; background: var(--c2-border); border-radius: 3px; outline: none;
    }
    .pw-length-row input[type="range"]::-webkit-slider-thumb {
      -webkit-appearance: none; appearance: none;
      width: 20px; height: 20px; background: var(--c2-red); border-radius: 50%; cursor: pointer; border: none;
    }
    .pw-length-row input[type="range"]::-moz-range-thumb {
      width: 20px; height: 20px; background: var(--c2-red); border-radius: 50%; cursor: pointer; border: none;
    }
    .pw-length-val { font-family: var(--c2-mono); font-size: 0.95rem; font-weight: 700; color: var(--c2-green); min-width: 30px; text-align: center; }
    .pw-display {
      background: var(--c2-bg); border: 1px solid var(--c2-border); border-radius: 9px;
      padding: 11px; font-family: var(--c2-mono); font-size: 0.9rem;
      color: var(--c2-green); word-break: break-all; text-align: center;
      margin: 8px 0; min-height: 42px; display: flex; align-items: center; justify-content: center;
    }
    .pw-strength { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
    .pw-strength-bar { flex: 1; height: 5px; background: var(--c2-border); border-radius: 3px; overflow: hidden; }
    .pw-strength-bar-fill { height: 100%; border-radius: 3px; transition: all 0.3s; }
    .pw-strength-label { font-size: 0.68rem; font-weight: 700; min-width: 55px; text-align: right; font-family: var(--c2-mono); }

    /* ── Bottom Nav ── */
    .c2-bottom-nav {
      position: fixed;
      bottom: 0; left: 0; right: 0;
      z-index: 9999;
      background: rgba(10,10,15,0.94);
      backdrop-filter: blur(20px) saturate(1.4);
      -webkit-backdrop-filter: blur(20px) saturate(1.4);
      border-top: 1px solid var(--c2-border);
      display: flex;
      align-items: center;
      gap: 2px;
      padding: 4px 6px;
      padding-bottom: calc(4px + var(--safe-bottom));
      height: 60px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }
    .c2-bottom-nav::-webkit-scrollbar { display: none; }
    .c2-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1px;
      text-decoration: none;
      color: var(--c2-text-dim);
      font-size: 0.5rem;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 8px;
      transition: all 0.2s;
      white-space: nowrap;
      -webkit-tap-highlight-color: transparent;
      flex-shrink: 0;
    }
    .c2-bottom-nav a i { font-size: 1.05rem; transition: all 0.2s; }
    .c2-bottom-nav a:hover, .c2-bottom-nav a:active, .c2-bottom-nav a.active { color: var(--c2-green); }

    /* ── Responsive ── */
    @media (min-width: 768px) {
      body { padding-top: 64px; padding-bottom: 24px; }
      .c2-topbar { height: 64px; padding: 0 20px; }
      .c2-topbar-brand { font-size: 1rem; }
      .c2-topbar-brand img { width: 32px; height: 32px; }
      .c2-btn-icon { width: 40px; height: 40px; font-size: 1rem; }
      .c2-container { padding: 20px; }
      .c2-card-header { padding: 14px 14px 0; }
      .c2-card-body.open, .c2-card-body.expanded { padding: 14px; }
      .c2-card-body { padding: 0 14px; }
      .c2-card-body.open { max-height: 500px; }
      .c2-terminal { max-height: 220px; font-size: 0.75rem; }
      .hamburger { display: none !important; }
      .mobile-menu { display: none !important; }
      .c2-bottom-nav { display: none; }
    }
    @media (max-width: 767px) {
      .hamburger { display: flex; }
      .c2-topbar-right .user-badge { display: none; }
      .desktop-nav { display: none !important; }
    }
    @media (max-width: 380px) {
      .pw-options { grid-template-columns: 1fr; }
      .c2-input-group { flex-direction: column; }
      .c2-input-group .c2-input { min-width: 100%; }
    }

    /* ── Utilities ── */
    .desktop-nav { display: flex; align-items: center; gap: 4px; }
    .flex { display: flex; }
    .flex-wrap { flex-wrap: wrap; }
    .gap-8 { gap: 8px; }
    .mt-8 { margin-top: 8px; }
    .mb-8 { margin-bottom: 8px; }
    .text-center { text-align: center; }
    .text-dim { color: var(--c2-text-dim); }
    .text-green { color: var(--c2-green); }
    .text-red { color: var(--c2-red); }
    .text-sm { font-size: 0.75rem; }
    .text-xs { font-size: 0.65rem; }
    .font-mono { font-family: var(--c2-mono); }