*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --bg: #0f1117;
      --surface: #1a1d27;
      --surface2: #22263a;
      --border: #2e3250;
      --accent: #6c63ff;
      --success: #00d4aa;
      --danger: #ff4d6d;
      --text: #e2e8f0;
      --muted: #8892a4;
      --font: 'Segoe UI', system-ui, sans-serif;
      --mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
      --z-modal: 1000;
    }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: var(--font);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* ── Header ── */
    header {
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      padding: 13px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo { font-size: 1.45rem; font-weight: 800; letter-spacing: -1px; }
    .logo .sec { color: var(--accent); }
    .logo .blocks { color: #f59e0b; }
    .tagline { font-size: 0.76rem; color: var(--muted); margin-top: 2px; }
    .header-links { display: flex; gap: 12px; align-items: center; }
    .header-links a {
      display: flex; align-items: center; gap: 6px;
      font-size: 0.82rem; color: var(--muted); text-decoration: none;
      padding: 5px 10px; border-radius: 6px; border: 1px solid var(--border);
      transition: color 0.2s, border-color 0.2s;
    }
    .header-links a:hover { color: var(--accent); border-color: var(--accent); }
    .header-links a svg { flex-shrink: 0; }
    @media (max-width: 600px) { .header-links a.desktop-only { display: none; } }

    /* ── Tabs ── */
    .tabs {
      display: flex;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      padding: 0 24px;
    }
    .tab-btn {
      padding: 11px 20px;
      background: none;
      border: none;
      border-bottom: 2px solid transparent;
      color: var(--muted);
      font-size: 0.88rem;
      cursor: pointer;
      transition: all 0.2s;
      font-family: var(--font);
    }
    .tab-btn:hover { color: var(--text); }
    .tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

    .main { flex: 1; padding: 20px 24px; max-width: 1280px; margin: 0 auto; width: 100%; }

    .tab-panel { display: none; }
    .tab-panel.active { display: block; }

    /* ── Levels panel ── */
    .levels-panel {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
    }

    .levels-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 11px 16px;
      cursor: pointer;
      user-select: none;
      gap: 10px;
    }
    .levels-header:hover { background: var(--surface2); }

    .levels-title {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .levels-body {
      border-top: 1px solid var(--border);
      padding: 12px 14px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .levels-body.collapsed { display: none; }

    .level-row {
      display: grid;
      grid-template-columns: auto 1fr auto auto;
      gap: 10px;
      align-items: center;
      background: var(--surface2);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 8px 12px;
    }

    .level-badge {
      font-family: var(--mono);
      font-size: 0.78rem;
      font-weight: 700;
      padding: 3px 9px;
      border-radius: 5px;
      letter-spacing: 0.3px;
      white-space: nowrap;
    }

    .level-info {
      display: flex;
      flex-direction: column;
      gap: 1px;
      min-width: 0;
    }
    .level-desc {
      font-size: 0.82rem;
      color: var(--text);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .level-tag {
      font-family: var(--mono);
      font-size: 0.72rem;
      color: var(--muted);
    }

    .level-pass-wrap {
      display: flex;
      gap: 5px;
      align-items: center;
      min-width: 200px;
    }

    input[type="password"], input[type="text"], textarea {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--text);
      font-family: var(--mono);
      font-size: 0.88rem;
      padding: 7px 10px;
      outline: none;
      transition: border-color 0.2s;
      width: 100%;
    }
    input:focus, textarea:focus { border-color: var(--accent); }

    .icon-btn {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--muted);
      cursor: pointer;
      font-size: 0.82rem;
      padding: 6px 9px;
      white-space: nowrap;
      transition: all 0.2s;
      flex-shrink: 0;
    }
    .icon-btn:hover { border-color: var(--accent); color: var(--text); }
    .icon-btn.del:hover { border-color: var(--danger); color: var(--danger); }

    /* Add-level form */
    .add-level-row {
      display: grid;
      grid-template-columns: 80px 1fr auto;
      gap: 8px;
      align-items: center;
      padding-top: 4px;
      border-top: 1px solid var(--border);
      margin-top: 4px;
    }
    .add-level-row input[type="text"] { font-size: 0.85rem; }

    @media (max-width: 600px) {
      /* level-row: badge + info na 1ª linha, senha abaixo; delete oculto */
      .level-row {
        grid-template-columns: auto 1fr;
      }
      .level-row .icon-btn.del { display: none; }
      .level-pass-wrap {
        grid-column: 1 / -1;
        min-width: 0;
      }

      /* add-level: inputs na 1ª linha, botão na 2ª */
      .add-level-row {
        grid-template-columns: 70px 1fr;
      }
      .add-level-row .icon-btn {
        grid-column: 1 / -1;
      }

      /* header: permite quebrar se necessário */
      .levels-header { flex-wrap: wrap; gap: 8px; }
    }

    /* ── Status bar ── */
    .status-bar {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 9px 14px;
      font-size: 0.82rem;
      color: var(--muted);
      margin-bottom: 14px;
      min-height: 37px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-bar.ok   { border-color: var(--success); color: var(--success); }
    .status-bar.err  { border-color: var(--danger);  color: var(--danger);  }
    .status-bar.info { border-color: var(--accent);  color: var(--accent);  }

    /* ── Action buttons ── */
    .actions { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }

    .btn {
      padding: 9px 20px;
      border-radius: 8px;
      border: none;
      cursor: pointer;
      font-size: 0.88rem;
      font-family: var(--font);
      font-weight: 600;
      transition: all 0.15s;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .btn:hover { transform: translateY(-1px); filter: brightness(1.1); }
    .btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; filter: none !important; }

    .btn-encrypt { background: var(--accent); color: #fff; }
    .btn-decrypt { background: var(--success); color: #0f1117; }
    .btn-ghost {
      background: var(--surface2);
      border: 1px solid var(--border);
      color: var(--muted);
    }
    .btn-ghost:hover { border-color: var(--accent); color: var(--text); }

    /* ── Editor ── */
    .editor-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    @media (max-width: 800px) { .editor-grid { grid-template-columns: 1fr; } }

    .editor-box {
      display: flex;
      flex-direction: column;
      gap: 0;
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--border);
    }

    /* ENTRADA — azul/roxo */
    .editor-box:first-child { border-color: rgba(99,102,241,0.45); }
    .editor-box:first-child .editor-header {
      background: rgba(99,102,241,0.12);
      border-bottom: 1px solid rgba(99,102,241,0.3);
    }
    .editor-box:first-child .editor-title { color: #818cf8; }

    /* SAÍDA — verde */
    .editor-box:last-child { border-color: rgba(16,185,129,0.4); }
    .editor-box:last-child .editor-header {
      background: rgba(16,185,129,0.1);
      border-bottom: 1px solid rgba(16,185,129,0.3);
    }
    .editor-box:last-child .editor-title { color: #34d399; }

    .editor-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 14px;
    }
    .editor-title {
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .editor-box textarea {
      border: none !important;
      border-radius: 0 !important;
      outline: none !important;
    }

    .copy-btn {
      background: none;
      border: 1px solid var(--border);
      border-radius: 5px;
      color: var(--muted);
      cursor: pointer;
      font-size: 0.72rem;
      padding: 3px 9px;
      transition: all 0.2s;
      font-family: var(--font);
    }
    .copy-btn:hover { border-color: var(--success); color: var(--success); }
    .copy-btn.copied { border-color: var(--success); color: var(--success); }

    textarea {
      flex: 1;
      min-height: 460px;
      resize: vertical;
      line-height: 1.6;
    }

    /* ── Help box ── */
    .help-box {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 13px 17px;
      margin-bottom: 14px;
      font-size: 0.82rem;
      line-height: 1.6;
      color: var(--muted);
    }
    .help-box h4 { color: var(--text); margin-bottom: 6px; font-size: 0.86rem; }
    .help-box code {
      font-family: var(--mono);
      background: var(--surface2);
      padding: 1px 5px;
      border-radius: 4px;
      font-size: 0.79rem;
      color: var(--accent);
    }
    .help-box ul { padding-left: 18px; display: flex; flex-direction: column; gap: 4px; }

    /* ── Direct mode sub-tabs (mobile only) ── */
    .direct-subtabs {
      display: none;
      gap: 0;
      margin-bottom: 12px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: hidden;
    }
    .direct-subtab {
      flex: 1;
      padding: 10px;
      background: none;
      border: none;
      color: var(--muted);
      font-size: 0.88rem;
      font-family: var(--font);
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
    }
    .direct-subtab.active { background: var(--surface2); color: var(--text); }
    .direct-subtab:first-child { border-right: 1px solid var(--border); }

    /* ── Direct mode ── */
    .direct-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    @media (max-width: 800px) {
      .direct-subtabs { display: flex; }
      .direct-grid { grid-template-columns: 1fr; }
      .direct-grid .direct-box { display: none; }
      .direct-grid .direct-box.direct-active { display: flex; }
    }

    .direct-box {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 10px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      gap: 0;
    }
    .direct-box-header {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 16px;
      border-bottom: 1px solid var(--border);
    }
    .direct-box-header svg { flex-shrink: 0; }
    .direct-box-header h3 {
      font-size: 0.9rem;
      font-weight: 700;
      margin: 0;
      letter-spacing: -0.2px;
    }
    .direct-box-body {
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .direct-box textarea { min-height: 110px; }

    /* Encrypt — azul/roxo */
    .direct-box.box-encrypt { border-color: rgba(99,102,241,0.45); }
    .direct-box.box-encrypt .direct-box-header {
      background: rgba(99,102,241,0.12);
      border-bottom-color: rgba(99,102,241,0.3);
    }
    .direct-box.box-encrypt .direct-box-header h3 { color: #818cf8; }
    .direct-box.box-encrypt .direct-box-header svg { color: #818cf8; }

    /* Decrypt — verde */
    .direct-box.box-decrypt { border-color: rgba(16,185,129,0.4); }
    .direct-box.box-decrypt .direct-box-header {
      background: rgba(16,185,129,0.1);
      border-bottom-color: rgba(16,185,129,0.3);
    }
    .direct-box.box-decrypt .direct-box-header h3 { color: #34d399; }
    .direct-box.box-decrypt .direct-box-header svg { color: #34d399; }

    .level-select-wrap {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .level-select-wrap label { font-size: 0.78rem; color: var(--muted); white-space: nowrap; }
    select {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--text);
      font-family: var(--mono);
      font-size: 0.84rem;
      padding: 6px 10px;
      outline: none;
      cursor: pointer;
    }
    select:focus { border-color: var(--accent); }

    .row-btns { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

    /* chevron */
    .chevron { transition: transform 0.2s; font-style: normal; font-size: 0.75rem; color: var(--muted); }
    .chevron.open { transform: rotate(180deg); }

    /* ── Vault Banner ── */
    .vault-banner {
      display: none;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      background: var(--surface);
      border: 1px solid var(--accent);
      border-radius: 8px;
      padding: 9px 14px;
      font-size: 0.82rem;
      color: var(--accent);
      margin-bottom: 14px;
    }
    .vault-banner span { display: flex; align-items: center; gap: 6px; }

    /* ── Vault Layout ── */
    .vault-layout {
      display: grid;
      grid-template-columns: 380px 1fr;
      gap: 20px;
      align-items: start;
    }
    @media (max-width: 800px) {
      .vault-layout { grid-template-columns: 1fr; }
    }

    /* ── Vault Tab Panel ── */
    .vault-panel {
      position: sticky;
      top: 16px;
    }

    .vault-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 32px 28px 24px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .vault-card::before {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: 16px;
      opacity: 0.06;
      pointer-events: none;
    }

    /* state: empty */
    .vault-card--empty { border-color: var(--border); }
    .vault-card--empty::before { background: var(--muted); }
    .vault-card--empty .vault-card-icon-wrap { background: rgba(136,146,164,0.12); border-color: rgba(136,146,164,0.2); }
    .vault-card--empty .vault-card-icon { filter: grayscale(1) opacity(0.5); }

    /* state: locked */
    .vault-card--locked { border-color: rgba(108,99,255,0.4); }
    .vault-card--locked::before { background: var(--accent); }
    .vault-card--locked .vault-card-icon-wrap { background: rgba(108,99,255,0.12); border-color: rgba(108,99,255,0.3); }

    /* state: unlocked */
    .vault-card--unlocked { border-color: rgba(0,212,170,0.4); }
    .vault-card--unlocked::before { background: var(--success); }
    .vault-card--unlocked .vault-card-icon-wrap { background: rgba(0,212,170,0.12); border-color: rgba(0,212,170,0.3); }

    .vault-card-icon-wrap {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      border: 1px solid transparent;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .vault-card-icon { font-size: 2.2rem; line-height: 1; }

    .vault-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text);
      margin: 0 0 6px;
    }
    .vault-card-desc {
      font-size: 0.84rem;
      color: var(--muted);
      margin: 0 0 20px;
      line-height: 1.5;
    }

    .vault-card-badge {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 20px;
      margin-bottom: 20px;
    }
    .vault-card--locked  .vault-card-badge { background: rgba(108,99,255,0.15); color: #a5b4fc; border: 1px solid rgba(108,99,255,0.3); }
    .vault-card--unlocked .vault-card-badge { background: rgba(0,212,170,0.12); color: var(--success); border: 1px solid rgba(0,212,170,0.3); }

    .vault-card-divider {
      width: 100%;
      height: 1px;
      background: var(--border);
      margin-bottom: 18px;
    }

    .vault-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }

    /* ── Vault Buttons ── */
    .btn-vault  { background: var(--accent); color: #fff; }
    .btn-danger { background: transparent; color: var(--danger); border: 1px solid rgba(255,77,109,0.4); }
    .btn-danger:hover { background: rgba(255,77,109,0.1); }

    /* ── Vault Modal ── */
    .vault-modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,.65);
      z-index: var(--z-modal);
      align-items: center;
      justify-content: center;
    }
    .vault-modal {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 24px;
      min-width: min(320px, 90vw);
      max-width: 420px;
      width: 90%;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .vault-modal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .vault-modal-header span {
      font-weight: 700;
      font-size: 1rem;
      color: var(--text);
    }
    .vault-modal-body { display: flex; flex-direction: column; gap: 12px; }
    .vault-modal-msg  { color: var(--muted); font-size: 0.88rem; margin: 0; }
    .vault-modal-hint { color: var(--muted); font-size: 0.82rem; margin: 0; }
    .vault-modal-btns { display: flex; gap: 8px; flex-wrap: wrap; }

    /* ── PIN Input ── */
    .vault-pin-wrap { display: flex; flex-direction: column; gap: 4px; }
    .vault-pin-wrap label { font-size: 0.8rem; color: var(--muted); }
    .vault-pin-input { letter-spacing: 4px; font-size: 1.1rem; text-align: center; }
    .vault-pin-err  { color: var(--danger); font-size: 0.8rem; margin: 0; }

    /* ── QR Scanner ── */
    .qr-scanner-wrap {
      position: relative;
      border-radius: 10px;
      overflow: hidden;
      background: #000;
      aspect-ratio: 1;
      width: 100%;
      max-width: 320px;
      margin: 0 auto;
    }
    .qr-scanner-wrap video {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .qr-viewfinder {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      pointer-events: none;
    }
    .qr-frame {
      position: relative;
      width: 65%;
      aspect-ratio: 1;
    }
    .qr-frame::before, .qr-frame::after,
    .qr-frame > span::before, .qr-frame > span::after {
      content: '';
      position: absolute;
      width: 20px;
      height: 20px;
      border-color: var(--accent);
      border-style: solid;
    }
    .qr-frame::before      { top: 0;    left: 0;  border-width: 3px 0 0 3px; }
    .qr-frame::after       { top: 0;    right: 0; border-width: 3px 3px 0 0; }
    .qr-frame > span::before { bottom: 0; left: 0;  border-width: 0 0 3px 3px; }
    .qr-frame > span::after  { bottom: 0; right: 0; border-width: 0 3px 3px 0; }
    .qr-scanline {
      position: absolute;
      left: 5%;
      width: 90%;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--accent), transparent);
      animation: qr-scan 2s ease-in-out infinite;
    }
    @keyframes qr-scan {
      0%   { top: 10%; opacity: 1; }
      50%  { top: 88%; opacity: 1; }
      100% { top: 10%; opacity: 1; }
    }