:root {
    --bg: #0d0f18;
    --panel: #13161f;
    --border: #1e2235;
    --accent: #7c6dfa;
    --accent2: #3ecfcf;
    --accent3: #f5a623;
    --text: #e2e4f0;
    --muted: #5a5f7a;
    --green: #4ade80;
    --red: #f87171;
    --blue: #60a5fa;
    --purple: #c084fc;
    --orange: #fb923c;
    --yellow: #fbbf24;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Syne', sans-serif;
    min-height: 100vh;
    padding: 0;
    overflow-x: hidden;
  }

  /* ── HEADER ── */
  header {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 18px 32px;
    display: flex;
    align-items: center;
    gap: 18px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
  }

  .ts-badge {
    background: var(--accent);
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 1px;
  }

  header h1 {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.5px;
  }

  header span {
    color: var(--muted);
    font-size: 13px;
    margin-left: auto;
    font-family: 'JetBrains Mono', monospace;
  }

  /* ── LAYOUT ── */
  .main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    height: calc(100vh - 61px);
  }

  /* ── TABS ── */
  .tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: var(--panel);
  }

  .tab {
    padding: 10px 20px;
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all .2s;
    letter-spacing: .5px;
  }

  .tab.active { color: var(--accent); border-bottom-color: var(--accent); }
  .tab:hover:not(.active) { color: var(--text); }

  /* ── CODE PANEL ── */
  .code-panel {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    overflow: hidden;
  }

  .code-scroll {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--bg);
  }

  pre {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    line-height: 1.85;
    white-space: pre;
    counter-reset: line;
  }

  .code-line {
    display: flex;
    counter-increment: line;
  }

  .code-line::before {
    content: counter(line);
    min-width: 36px;
    color: var(--muted);
    text-align: right;
    margin-right: 20px;
    user-select: none;
    opacity: .5;
    font-size: 11px;
    padding-top: 1px;
  }

  .code-line:hover { background: rgba(124,109,250,.05); border-radius: 4px; }

  /* ── SYNTAX TOKENS ── */
  .kw   { color: var(--purple); }
  .type { color: var(--accent2); }
  .str  { color: var(--green); }
  .num  { color: var(--orange); }
  .fn   { color: var(--blue); }
  .cmt  { color: var(--muted); font-style: italic; }
  .key  { color: var(--accent2); }
  .bool { color: var(--orange); }
  .op   { color: var(--accent); }

  /* ── RIGHT: CONCEPTS + CONSOLE ── */
  .right-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  /* ── CONCEPT CARDS ── */
  .concepts {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    background: var(--panel);
    overflow-y: auto;
    max-height: 280px;
  }

  .concepts-title {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--muted);
    text-transform: uppercase;
    margin-bottom: 12px;
  }

  .cards {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    transition: all .2s;
    min-width: 130px;
  }

  .card:hover { border-color: var(--accent); transform: translateY(-2px); }
  .card.active { border-color: var(--accent); background: rgba(124,109,250,.08); }

  .card-icon { font-size: 18px; margin-bottom: 4px; }
  .card-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: .5px;
  }
  .card-sub { font-size: 10px; color: var(--muted); margin-top: 2px; }

  /* ── CONSOLE ── */
  .console-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #090b12;
  }

  .console-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    background: var(--panel);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .console-header span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
  }

  .dot { width: 8px; height: 8px; border-radius: 50%; }
  .dot-red { background: #f87171; }
  .dot-yellow { background: #fbbf24; }
  .dot-green { background: #4ade80; }

  .run-btn {
    margin-left: auto;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 7px;
    padding: 6px 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: .5px;
    transition: all .2s;
  }

  .run-btn:hover { background: #6a5ce8; transform: scale(1.04); }
  .run-btn:active { transform: scale(.97); }

  .clear-btn {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    cursor: pointer;
    transition: all .2s;
    margin-left: 8px;
  }
  .clear-btn:hover { color: var(--text); border-color: var(--muted); }

  .console-output {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 2;
  }

  .log-section {
    color: var(--accent);
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 1px;
    margin: 10px 0 2px;
    padding: 4px 8px;
    background: rgba(124,109,250,.08);
    border-left: 3px solid var(--accent);
    border-radius: 0 4px 4px 0;
  }

  .log-line { color: var(--text); padding: 1px 0; }
  .log-key  { color: var(--accent2); }
  .log-str  { color: var(--green); }
  .log-num  { color: var(--orange); }
  .log-bool { color: var(--yellow); }
  .log-null { color: var(--muted); }

  .prompt { color: var(--muted); user-select: none; margin-right: 8px; }

  /* ── SCROLLBAR ── */
  ::-webkit-scrollbar { width: 5px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

  /* ── SECTION HIGHLIGHT ── */
  .section-banner {
    padding: 8px 24px 4px;
    font-size: 10px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    border-top: 1px solid var(--border);
    margin-top: 8px;
  }

  /* ── COMPILE STEPS ── */
  .compile-steps {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    font-size: 10px;
    font-family: 'JetBrains Mono', monospace;
    color: var(--muted);
    background: var(--panel);
    border-bottom: 1px solid var(--border);
  }
  .step { display: flex; align-items: center; gap: 4px; }
  .step-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
  .step.done .step-dot { background: var(--green); }
  .arrow { color: var(--border); }




 /* ============================================================
  TypeScript Assignment — style.css (linked from index.html)
  Author: Hassan Javed © 2026
 ============================================================ */