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

  :root {
    --bg-deep: #191127;
    --bg-panel: #1f1232;
    --bg-card: #23133a;
    --bg-input: #0a0f16;
    --border: #3a1c63;
    --border-glow: #5e309d;
    --accent: #883CF0;
    --accent-dim: #4e039f1a;
    --accent-mid: #4e039fdd;
    --accent2: #7c3aed;
    --accent3: #8b5cf6;
    --text: #e0e8f0;
    --text-dim: #c8ccd0;
    --text-mid: #d6d6d6;
    --success: #00e5a0;
    --warning: #ffaa00;
    --danger: #ff4466;
  }

  html { scroll-behavior: smooth; }

  body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-deep);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* Animated grid background */
  body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
      linear-gradient(90deg, transparent 98%, var(--border) 100%),
      linear-gradient(0deg, transparent 98%, var(--border) 100%);
    background-size: 60px 60px;
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
  }

  body::after {
    content: '';
    position: fixed;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(ellipse at 30% 20%, var(--accent-dim) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, #8000ff11 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: ambientDrift 20s ease-in-out infinite alternate;
  }

  @keyframes ambientDrift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-5%, 3%); }
  }

  .container {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
  }

  /* ─── HEADER ─── */
  header {
    text-align: center;
    padding: 60px 20px 40px;
    position: relative;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
  }

  .logo-icon {
    width: 52px; height: 52px;
    border: 2px solid var(--accent);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    background: var(--accent-dim);
    box-shadow: 0 0 30px var(--accent-dim), inset 0 0 20px var(--accent-dim);
    animation: iconPulse 3s ease-in-out infinite;
  }

  @keyframes iconPulse {
    0%, 100% { box-shadow: 0 0 30px var(--accent-dim), inset 0 0 20px var(--accent-dim); }
    50% { box-shadow: 0 0 50px var(--accent-mid), inset 0 0 30px var(--accent-dim); }
  }

  .logo-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--accent);
    text-transform: uppercase;
  }

  header p {
    color: var(--text-dim);
    font-size: 15px;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
  }

  /* ─── TAB NAV ─── */
  .tab-nav {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 36px;
    flex-wrap: wrap;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 6px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
  }

  .tab-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s;
    position: relative;
  }

  .tab-btn:hover { color: var(--text); background: var(--bg-card); }

  .tab-btn.active {
    background: var(--accent);
    color: var(--bg-deep);
    font-weight: 700;
    box-shadow: 0 0 20px var(--accent-dim);
  }

  /* ─── PANELS ─── */
  .panel {
    display: none;
    animation: panelIn 0.4s ease;
  }
  .panel.active { display: block; }

  @keyframes panelIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-mid), transparent);
    opacity: 0.5;
  }

  .card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
  }

  .card-header .icon {
    width: 40px; height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: var(--accent-dim);
    border: 1px solid var(--accent-mid);
  }

  .card-header h2 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
  }

  .card-header .badge {
    margin-left: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--accent-mid);
  }

  /* ─── FORM ELEMENTS ─── */
  label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 8px;
  }

  textarea, input[type="text"], input[type="password"], input[type="number"] {
    width: 100%;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--text);
    resize: vertical;
    transition: border-color 0.3s, box-shadow 0.3s;
    outline: none;
  }

  textarea:focus, input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
  }

  textarea { min-height: 120px; line-height: 1.6; }

  select {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 16px;
    color: var(--text);
    cursor: pointer;
    outline: none;
    width: 100%;
    transition: border-color 0.3s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%235a6a7a'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
  }

  select:focus { border-color: var(--accent); }

  .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
  }

  .form-group { margin-bottom: 16px; }

  /* ─── BUTTONS ─── */
  .btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    border-radius: 12px;
    padding: 14px 28px;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }

  .btn-primary {
    background: var(--accent);
    color: var(--bg-deep);
    box-shadow: 0 4px 20px var(--accent-dim);
  }
  .btn-primary:hover {
    box-shadow: 0 4px 30px var(--accent-mid);
    transform: translateY(-1px);
  }

  .btn-secondary {
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
  }
  .btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
  }

  .btn-danger {
    background: var(--danger);
    color: white;
  }

  .btn-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
  }

  /* ─── OUTPUT ─── */
  .output-area {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-top: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    color: var(--accent);
    min-height: 80px;
    word-break: break-all;
    white-space: pre-wrap;
    position: relative;
  }

  .output-area.empty { color: var(--text-dim); font-style: italic; }

  .output-area .copy-badge {
    position: absolute;
    top: 10px; right: 10px;
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-dim);
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 8px;
    cursor: pointer;
    transition: all 0.3s;
  }
  .output-area .copy-badge:hover {
    color: var(--accent);
    border-color: var(--accent);
  }

  /* ─── STATUS ─── */
  .status {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 1px;
    padding: 8px 14px;
    border-radius: 8px;
    margin-top: 12px;
    display: none;
  }
  .status.show { display: inline-block; }
  .status.success { background: #00e5a018; color: var(--success); border: 1px solid #00e5a033; }
  .status.error { background: #ff446618; color: var(--danger); border: 1px solid #ff446633; }

  /* ─── ALGO CARDS ─── */
  .algo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
  }

  .algo-card {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'JetBrains Mono', monospace;
  }

  .algo-card:hover { border-color: var(--accent); background: var(--accent-dim); }
  .algo-card.selected {
    border-color: var(--accent);
    background: var(--accent-dim);
    box-shadow: 0 0 20px var(--accent-dim);
  }

  .algo-card .algo-name { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
  .algo-card .algo-desc { font-size: 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }

  /* ─── PASSWORD METER ─── */
  .strength-bar {
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    margin-top: 8px;
    overflow: hidden;
  }
  .strength-bar .fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.4s, background 0.4s;
  }

  /* ─── INFO SECTION ─── */
  .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 24px;
  }

  .info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
    transition: all 0.3s;
  }
  .info-card:hover {
    border-color: var(--accent-mid);
    transform: translateY(-2px);
  }

  .info-card .info-icon { font-size: 28px; margin-bottom: 12px; }
  .info-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
  .info-card p { font-size: 13px; color: var(--text-dim); line-height: 1.6; }

  /* ─── CHECKBOX ─── */
  .checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
  }

  .checkbox-row input[type="checkbox"] {
    width: 18px; height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
  }

  .checkbox-row label {
    margin: 0;
    font-size: 13px;
    color: var(--text-mid);
    cursor: pointer;
  }

  /* ─── RANGE ─── */
  input[type="range"] {
    width: 100%;
    /* -webkit-appearance: none; */
    height: 6px;
    border-radius: 3px;
    background: var(--border);
    outline: none;
  }
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-mid);
  }

  .range-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    text-align: center;
    margin-bottom: 8px;
  }

  /* ─── FOOTER ─── */
  footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-dim);
    font-size: 12px;
    letter-spacing: 1px;
    border-top: 1px solid var(--border);
    margin-top: 40px;
  }

  footer .secure-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-dim);
    border: 1px solid var(--accent-mid);
    padding: 6px 14px;
    border-radius: 8px;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    margin-bottom: 12px;
  }

  /* ─── RESPONSIVE ─── */
  @media (max-width: 640px) {
    .form-row { grid-template-columns: 1fr; }
    .tab-nav { border-radius: 12px; }
    .tab-btn { padding: 10px 14px; font-size: 10px; }
    .card { padding: 24px 18px; }
    .logo-text { font-size: 22px; }
    .algo-grid { grid-template-columns: repeat(2, 1fr); }
    .info-grid { grid-template-columns: 1fr; }
  }