.as-tab {
      background: none; border: none; cursor: pointer;
      padding: 0.75rem 1rem; font-size: 0.85rem; font-weight: 500;
      color: var(--text-3, #9aa6b2); border-bottom: 2px solid transparent;
      margin-bottom: -1px; transition: color .15s, border-color .15s;
      white-space: nowrap;
    }
    .as-tab:hover { color: var(--text, #f8fafc); }
    .as-tab.active { color: var(--accent, #6366f1); border-bottom-color: var(--accent, #6366f1); }
    .as-panel { display: none; flex-direction: column; gap: 1rem; }
    .as-panel.active { display: flex; }
    .as-label { display: block; font-size: 0.8rem; color: var(--text-2, #c8d0db); margin-bottom: 0.35rem; font-weight: 500; }
    .as-input {
      width: 100%; box-sizing: border-box;
      padding: 0.6rem 0.85rem;
      background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px; color: #f8fafc; font-size: 0.9rem; outline: none;
      transition: border-color .15s;
    }
    .as-input:focus { border-color: var(--accent, #6366f1); }
    .as-field { display: flex; flex-direction: column; }
    .as-msg { font-size: 0.82rem; min-height: 1.1em; }
    .as-btn {
      display: inline-flex; align-items: center; justify-content: center;
      padding: 0.6rem 1.25rem; border-radius: 8px; font-size: 0.88rem;
      font-weight: 600; cursor: pointer; border: none; transition: opacity .15s, background .15s;
    }
    .as-btn:hover { opacity: 0.88; }
    .as-btn.primary { background: var(--accent, #6366f1); color: #fff; }
    .as-btn.danger { background: #ef4444; color: #fff; }
    .as-btn.ghost { background: rgba(255,255,255,0.07); color: var(--text, #f8fafc); border: 1px solid rgba(255,255,255,0.12); }

/* ── Profile avatar button ───────────────────────────────────── */
    .nav-avatar-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: var(--accent);
      border: none;
      cursor: pointer;
      padding: 0;
      transition: opacity 0.15s, box-shadow 0.15s;
      outline: none;
    }
    .nav-avatar-btn:hover { opacity: 0.85; box-shadow: 0 0 0 3px rgba(var(--accent-rgb, 99,102,241),0.2); }
    .nav-avatar-btn:focus-visible { box-shadow: 0 0 0 3px rgba(var(--accent-rgb, 99,102,241),0.35); }
    .nav-avatar-icon {
      font-size: 0.75rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.01em;
      text-transform: uppercase;
      line-height: 1;
      pointer-events: none;
    }

    /* ── Dropdown ─────────────────────────────────────────────────── */
    .nav-dropdown {
      display: none;
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      min-width: 200px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg, 10px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.18);
      z-index: 9999;
      padding: 0.35rem 0;
      animation: dropIn 0.12s ease;
    }
    .nav-dropdown.open { display: block; }
    @keyframes dropIn {
      from { opacity: 0; transform: translateY(-4px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .nav-dropdown-user {
      padding: 0.6rem 0.9rem 0.5rem;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .nav-dropdown-name {
      font-size: 0.825rem;
      font-weight: 600;
      color: var(--text);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .nav-dropdown-email {
      font-size: 0.75rem;
      color: var(--text-3);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .nav-dropdown-sep {
      border: none;
      border-top: 1px solid var(--border);
      margin: 0.25rem 0;
    }
    .nav-dropdown-item {
      display: block;
      width: 100%;
      text-align: left;
      padding: 0.45rem 0.9rem;
      font-size: 0.825rem;
      font-weight: 500;
      color: var(--text-2);
      text-decoration: none;
      background: none;
      border: none;
      cursor: pointer;
      font-family: inherit;
      transition: background 0.1s, color 0.1s;
    }
    .nav-dropdown-item:hover { background: var(--surface-hover, rgba(255,255,255,0.04)); color: var(--text); }
    .nav-dropdown-signout { color: #f87171; }
    .nav-dropdown-signout:hover { background: rgba(239,68,68,0.08); color: #f87171; }