@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Orbitron:wght@400;700;900&family=Rajdhani:wght@300;400;600&display=swap');

  :root {
    --bg: #050a0e;
    --panel: #0a1520;
    --panel2: #0d1e2e;
    --border: #1a3a5c;
    --accent: #00d4ff;
    --accent2: #00ff88;
    --accent3: #ff6b35;
    --warn: #ffcc00;
    --text: #c8e6f0;
    --text-dim: #4a7a9b;
    --glow: 0 0 20px rgba(0,212,255,0.3);
    --glow2: 0 0 20px rgba(0,255,136,0.3);
  }

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

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

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
      radial-gradient(ellipse at 10% 20%, rgba(0,212,255,0.04) 0%, transparent 50%),
      radial-gradient(ellipse at 90% 80%, rgba(0,255,136,0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
  }

  /* SCAN LINE */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,0.03) 2px,
      rgba(0,0,0,0.03) 4px
    );
    pointer-events: none;
    z-index: 1000;
  }

  header {
    position: relative;
    padding: 40px 40px 30px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(0,212,255,0.05) 0%, transparent 100%);
  }

  .header-grid {
    display: flex;
    align-items: flex-end;
    gap: 24px;
  }

  .logo-block {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .logo-icon {
    width: 48px; height: 48px;
    border: 2px solid var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    box-shadow: var(--glow);
    animation: pulse 3s ease-in-out infinite;
    flex-shrink: 0;
  }

  @keyframes pulse {
    0%,100% { box-shadow: 0 0 20px rgba(0,212,255,0.3); }
    50% { box-shadow: 0 0 40px rgba(0,212,255,0.6); }
  }

  h1 {
    font-family: 'Orbitron', monospace;
    font-size: 28px;
    font-weight: 900;
    color: var(--accent);
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(0,212,255,0.5);
    line-height: 1.1;
  }

  .subtitle {
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 3px;
    margin-top: 4px;
  }

  .status-bar {
    margin-left: auto;
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: var(--text-dim);
    text-align: right;
  }

  .status-dot {
    display: inline-block;
    width: 6px; height: 6px;
    background: var(--accent2);
    border-radius: 50%;
    margin-right: 6px;
    animation: blink 1.5s step-end infinite;
  }

  @keyframes blink { 50% { opacity: 0; } }

  /* TABS */
  .tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    padding: 0 40px;
    background: var(--panel);
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .tab {
    font-family: 'Orbitron', monospace;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-dim);
    padding: 16px 24px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    white-space: nowrap;
  }

  .tab:hover { color: var(--text); }
  .tab.active { color: var(--accent); border-bottom-color: var(--accent); }

  /* MAIN */
  main {
    padding: 32px 40px;
    max-width: 1400px;
    margin: 0 auto;
  }

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

  /* CARDS */
  .card {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 20px;
    position: relative;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--accent);
  }

  .card.green::before { background: var(--accent2); }
  .card.orange::before { background: var(--accent3); }
  .card.yellow::before { background: var(--warn); }

  .card-title {
    font-family: 'Orbitron', monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .card.green .card-title { color: var(--accent2); }
  .card.orange .card-title { color: var(--accent3); }
  .card.yellow .card-title { color: var(--warn); }

  /* FORM ELEMENTS */
  label {
    display: block;
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 2px;
    margin-bottom: 8px;
  }

  textarea, input[type="text"], select {
    width: 100%;
    background: rgba(0,212,255,0.03);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    padding: 12px 16px;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
  }

  textarea:focus, input:focus, select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(0,212,255,0.15);
  }

  textarea { resize: vertical; min-height: 100px; }

  select option { background: #0a1520; }

  .btn {
    font-family: 'Orbitron', monospace;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 3px;
    padding: 12px 28px;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
  }

  .btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent);
    transform: translateX(-100%);
    transition: transform 0.3s;
    z-index: -1;
  }

  .btn:hover { color: var(--bg); }
  .btn:hover::before { transform: translateX(0); }

  .btn.green { border-color: var(--accent2); color: var(--accent2); }
  .btn.green::before { background: var(--accent2); }
  .btn.orange { border-color: var(--accent3); color: var(--accent3); }
  .btn.orange::before { background: var(--accent3); }

  .btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 16px; }

  /* GRID */
  .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

  @media (max-width: 900px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    header { padding: 24px 20px; }
    main { padding: 20px; }
    .tabs { padding: 0 10px; }
  }

  /* OUTPUT AREAS */
  .mono-output {
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    padding: 16px;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 60px;
    color: var(--accent2);
    line-height: 1.6;
  }

  .result-key {
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 2px;
    margin-bottom: 4px;
    margin-top: 12px;
  }

  .result-val {
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    color: var(--accent);
    padding: 8px 12px;
    background: rgba(0,212,255,0.05);
    border-left: 2px solid var(--accent);
    word-break: break-all;
  }

  .result-val.green { color: var(--accent2); border-color: var(--accent2); background: rgba(0,255,136,0.05); }
  .result-val.orange { color: var(--accent3); border-color: var(--accent3); background: rgba(255,107,53,0.05); }
  .result-val.big { font-size: 22px; font-weight: bold; }

  /* IC BADGE */
  .ic-display {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 8px;
  }

  .ic-badge {
    flex: 1;
    min-width: 160px;
    padding: 16px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    text-align: center;
  }

  .ic-badge .val {
    font-family: 'Orbitron', monospace;
    font-size: 28px;
    font-weight: 900;
    color: var(--accent);
  }

  .ic-badge .lbl {
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 2px;
    margin-top: 4px;
  }

  .ic-badge .interpretation {
    font-size: 12px;
    color: var(--warn);
    margin-top: 8px;
    letter-spacing: 1px;
  }

  /* FREQ TABLE */
  .freq-table-wrapper { overflow-x: auto; margin-top: 8px; }

  .freq-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
  }

  .freq-table th {
    background: rgba(0,212,255,0.1);
    color: var(--accent);
    padding: 8px 12px;
    text-align: center;
    border: 1px solid var(--border);
    font-size: 10px;
    letter-spacing: 1px;
  }

  .freq-table td {
    padding: 6px 12px;
    border: 1px solid rgba(26,58,92,0.5);
    text-align: center;
    color: var(--text);
  }

  .freq-bar {
    display: inline-block;
    height: 8px;
    background: var(--accent);
    min-width: 2px;
    vertical-align: middle;
    margin-left: 6px;
    opacity: 0.7;
  }

  .freq-table tr:hover td { background: rgba(0,212,255,0.05); }

  /* BRUTE FORCE TABLE */
  .bf-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    margin-top: 8px;
  }

  .bf-table th {
    background: rgba(255,107,53,0.1);
    color: var(--accent3);
    padding: 8px;
    border: 1px solid var(--border);
    letter-spacing: 1px;
    font-size: 10px;
  }

  .bf-table td {
    padding: 5px 8px;
    border: 1px solid rgba(26,58,92,0.4);
    color: var(--text);
    word-break: break-all;
  }

  .bf-table tr.highlight { background: rgba(0,255,136,0.08); }
  .bf-table tr.highlight td { color: var(--accent2); }

  /* KASISKI */
  .kasiski-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Share Tech Mono', monospace;
    font-size: 11px;
    margin-top: 8px;
  }

  .kasiski-table th {
    background: rgba(255,204,0,0.1);
    color: var(--warn);
    padding: 8px;
    border: 1px solid var(--border);
    font-size: 10px;
    letter-spacing: 1px;
  }

  .kasiski-table td {
    padding: 5px 8px;
    border: 1px solid rgba(26,58,92,0.4);
    color: var(--text);
  }

  /* THEORY */
  .theory-block {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent2);
    padding: 16px 20px;
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
  }

  .theory-block h3 {
    font-family: 'Orbitron', monospace;
    font-size: 13px;
    color: var(--accent2);
    letter-spacing: 2px;
    margin-bottom: 12px;
  }

  .formula {
    background: rgba(0,212,255,0.05);
    border: 1px solid rgba(0,212,255,0.2);
    padding: 12px 16px;
    margin: 12px 0;
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
    color: var(--accent);
    text-align: center;
  }

  .note {
    background: rgba(255,204,0,0.05);
    border-left: 2px solid var(--warn);
    padding: 10px 14px;
    font-size: 13px;
    color: var(--warn);
    margin-top: 12px;
  }

  /* PROGRESS / SECTION HEADER */
  .section-header {
    font-family: 'Orbitron', monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 3px;
    padding-bottom: 12px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
  }

  /* ALERT */
  .alert {
    padding: 12px 16px;
    border: 1px solid var(--accent2);
    background: rgba(0,255,136,0.05);
    color: var(--accent2);
    font-family: 'Share Tech Mono', monospace;
    font-size: 12px;
    margin-top: 16px;
    display: none;
  }

  .alert.error { border-color: var(--accent3); background: rgba(255,107,53,0.05); color: var(--accent3); }
  .alert.visible { display: block; }

  /* DIVIDER */
  .divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 24px 0;
  }

  /* SCROLLBAR */
  ::-webkit-scrollbar { width: 6px; height: 6px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--border); }
  ::-webkit-scrollbar-thumb:hover { background: var(--accent); }

  /* SPINNER */
  .spin {
    display: inline-block;
    width: 14px; height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 8px;
  }

  @keyframes spin { to { transform: rotate(360deg); } }

  /* TAG */
  .tag {
    display: inline-block;
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    letter-spacing: 2px;
    padding: 3px 10px;
    border: 1px solid currentColor;
    margin-right: 6px;
  }

  .tag.green { color: var(--accent2); }
  .tag.blue { color: var(--accent); }
  .tag.orange { color: var(--accent3); }