:root {
      --bg: #0a0f1f;
      --bg-2: #10172a;
      --panel: #0f1729;
      --panel-2: #131d35;
      --card: #111b30;
      --text: #dbe9ff;
      --muted: #95a9c9;
      --accent: #5df2a2;
      --accent-2: #72d5ff;
      --border: #243556;
      --shadow: rgba(2, 10, 28, 0.55);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      line-height: 1.5;
      color: var(--text);
      background:
        radial-gradient(circle at 15% 10%, rgba(93, 242, 162, 0.1), transparent 28%),
        radial-gradient(circle at 90% 90%, rgba(114, 213, 255, 0.1), transparent 24%),
        linear-gradient(145deg, var(--bg), var(--bg-2));
      min-height: 100vh;
    }

    .container {
      max-width: 1000px;
      margin: 2.2rem auto;
      padding: 0 1rem;
    }

    .terminal {
      border: 1px solid var(--border);
      border-radius: 16px;
      background: linear-gradient(180deg, var(--panel), var(--panel-2));
      box-shadow: 0 24px 60px var(--shadow);
      overflow: hidden;
    }

    .terminal-header {
      height: 42px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 0.95rem;
      background: rgba(6, 11, 21, 0.55);
    }

    .window-buttons {
      display: flex;
      align-items: center;
      gap: 0.42rem;
    }

    .dot {
      width: 11px;
      height: 11px;
      border-radius: 50%;
      border: 1px solid rgba(255, 255, 255, 0.12);
    }

    .dot.red { background: #ff5f56; }
    .dot.yellow { background: #ffbd2e; }
    .dot.green { background: #27c93f; }

    .terminal-label {
      color: var(--muted);
      font-size: 0.78rem;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .terminal-body {
      padding: 1.2rem;
    }

    h1 {
      margin: 0 0 0.25rem;
      font-size: 1.8rem;
      color: #eaf2ff;
      letter-spacing: 0.02em;
    }

    .subtitle {
      margin: 0 0 1.25rem;
      color: var(--muted);
    }

    .command-box {
      background: #0a1224;
      color: #dff8ea;
      padding: 0.8rem 1rem;
      border-radius: 10px;
      margin-bottom: 1rem;
      overflow-x: auto;
      border: 1px solid #1f3152;
      position: relative;
    }

    .command-box::before {
      content: "$";
      color: var(--accent);
      margin-right: 0.6rem;
      font-weight: 700;
    }

    .command-box.filter-bar::before {
      content: "";
      margin-right: 0;
    }

    .filter-wrap {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.65rem;
    }

    .filter-label {
      color: var(--muted);
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .filter-btn {
      border: 1px solid #2a4167;
      background: #101d35;
      color: #d9e8ff;
      border-radius: 999px;
      padding: 0.4rem 0.72rem;
      font-size: 0.85rem;
      cursor: pointer;
      transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
      font-family: inherit;
    }

    .filter-btn:hover {
      border-color: var(--accent-2);
      transform: translateY(-1px);
    }

    .filter-btn.active {
      border-color: var(--accent);
      background: rgba(93, 242, 162, 0.14);
      color: #eafff4;
    }

    .command-box code,
    .option-card code,
    .overlay-panel code {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      font-size: 0.95rem;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(170px, 200px));
      gap: 1.1rem;
      justify-content: center;
    }

    .option-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 0.85rem;
      cursor: pointer;
      transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease, background 120ms ease;
      position: relative;
      backdrop-filter: blur(2px);
    }

    .option-card:hover,
    .option-card:focus-visible {
      transform: translateY(-2px);
      border-color: var(--accent);
      background: #162443;
      box-shadow: 0 10px 24px rgba(93, 242, 162, 0.16);
      outline: none;
    }

    .option-name {
      font-weight: 600;
      margin-bottom: 0.2rem;
    }

    .option-short {
      color: var(--muted);
      font-size: 0.92rem;
      margin: 0;
    }

    .hint {
      margin-top: 1rem;
      color: var(--muted);
      font-size: 0.9rem;
    }

    .example {
      background: #0d162b;
      border: 1px solid #203457;
      border-radius: 8px;
      padding: 0.65rem 0.75rem;
      margin-bottom: 0.65rem;
    }

    .overlay-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(6, 11, 21, 0.4);
      backdrop-filter: blur(2.6px) saturate(108%);
      opacity: 0;
      visibility: hidden;
      transition: opacity 140ms ease, visibility 140ms ease;
      pointer-events: none;
      z-index: 900;
    }

    .overlay-backdrop.show {
      opacity: 1;
      visibility: visible;
    }

    .overlay-panel {
      position: fixed;
      left: 50%;
      bottom: 2rem;
      transform: translateX(-50%) translateY(14px);
      width: min(860px, calc(100vw - 2rem));
      background: rgba(16, 26, 49, 0.94);
      border: 1px solid rgba(93, 242, 162, 0.35);
      border-radius: 14px;
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45);
      padding: 1rem;
      opacity: 0;
      visibility: hidden;
      transition: opacity 140ms ease, transform 140ms ease, visibility 140ms ease;
      pointer-events: none;
      z-index: 901;
    }

    .overlay-panel.show {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
    }

    .overlay-title {
      margin: 0 0 0.35rem;
      font-size: 1rem;
    }

    .overlay-desc {
      margin: 0 0 0.7rem;
      color: var(--muted);
    }

    .demo-terminal {
      margin: 0;
      min-height: 82px;
      color: #cfffe1;
      white-space: pre-wrap;
      line-height: 1.45;
      font-size: 0.9rem;
    }

    .copy-toast {
      position: fixed;
      right: 1rem;
      bottom: 1rem;
      background: rgba(16, 26, 49, 0.96);
      border: 1px solid var(--accent);
      color: #e8fff4;
      padding: 0.55rem 0.75rem;
      border-radius: 10px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
      opacity: 0;
      transform: translateY(8px);
      pointer-events: none;
      transition: opacity 140ms ease, transform 140ms ease;
      font-size: 0.86rem;
      z-index: 1000;
    }

    .copy-toast.show {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 700px) {
      .terminal-body {
        padding: 1rem;
      }

      h1 {
        font-size: 1.45rem;
      }

      .overlay-panel {
        bottom: 1rem;
      }
    }