/* Foundations: reset, header, controls, inputs, buttons, footer.
   Color tokens live in tokens.css. */
  * { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; }
  body {
    background: var(--mist);
    color: var(--ink);
    font-family: var(--font-ui);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
  }

  /* Header floats on the canvas — no border, no fill */
  header.app {
    max-width: var(--page-max-width);
    margin: 0 auto;
    padding: 36px 24px 12px;
    display: flex;
    align-items: center;
    gap: 14px;
  }
  header.app h1 {
    margin: 0;
    font-size: var(--text-heading);
    font-weight: 700;
    color: var(--ink);
  }
  header.app p {
    margin: 2px 0 0;
    color: var(--fog);
    font-size: var(--text-body);
    line-height: 1.5;
  }

  /* Controls bar floats on the canvas — no fill, no border */
  .controls {
    max-width: var(--page-max-width);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    align-items: center;
    padding: 8px 24px 4px;
  }
  .controls .group { display: flex; align-items: center; gap: 8px; }
  .controls label { color: var(--fog); font-size: var(--text-caption); }
  .controls .sep { width: 1px; height: 22px; background: var(--hairline); }

  input[type="number"], input[type="text"] {
    background: var(--paper);
    color: var(--ink);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-control);
    padding: 7px 9px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.12s, box-shadow 0.12s;
  }
  input[type="number"] { width: 64px; }
  input[type="number"]:focus, input[type="text"]:focus {
    border-color: var(--signal-blue);
    box-shadow: 0 0 0 3px rgba(37, 118, 235, 0.12);
  }

  /* Quiet by default; Signal Blue reserved for the one primary action per area */
  button {
    background: var(--paper);
    color: var(--ink);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-control);
    padding: 7px 12px;
    font-size: var(--text-caption);
    font-family: inherit;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, color 0.12s, transform 0.05s;
  }
  button:hover { border-color: var(--silver); }
  button:active { transform: translateY(1px); }
  button.primary {
    background: var(--signal-blue);
    border-color: var(--signal-blue);
    color: #fff;
    font-weight: 600;
  }
  button.primary:hover { background: var(--signal-blue-deep); border-color: var(--signal-blue-deep); }
  button.ghost { background: transparent; border-color: transparent; color: var(--ash); }
  button.ghost:hover { background: var(--paper); border-color: var(--hairline); color: var(--ink); }

  .symbols { display: flex; flex-wrap: wrap; gap: 6px; }
  .symbols button { min-width: 34px; font-size: 15px; padding: 6px 8px; color: var(--ash); }
  .symbols button:hover { color: var(--ink); }
  .symbols .key { color: var(--silver); font-size: 11px; margin-left: 3px; }

  .warn {
    max-width: var(--page-max-width);
    margin: 8px auto 0;
    padding: 10px 14px;
    background: var(--false-bg);
    color: var(--false);
    font-size: var(--text-caption);
    border-radius: var(--radius-control);
    display: none;
  }
  .warn.show { display: block; }

  .hint { color: var(--fog); font-size: 12px; }
  a { color: var(--signal-blue); text-decoration: none; }
  a:hover { color: var(--signal-blue-deep); }

  /* ----- footer + version (quiet text link) ----- */
  .app-footer {
    max-width: var(--page-max-width);
    margin: 0 auto;
    padding: 28px 24px 48px;
    text-align: center;
  }
  .version-btn {
    background: transparent;
    border: none;
    color: var(--fog);
    padding: 6px 8px;
    font-size: var(--text-caption);
    cursor: pointer;
  }
  .version-btn:hover { color: var(--ink); }
  .version-btn #versionLabel { color: var(--signal-blue); font-weight: 700; }

  .nowrap { white-space: nowrap; }

  /* ===================== bottom tab bar (mobile only) ===================== */
  .tabbar { display: none; }

  @media (max-width: 700px) {
    /* Bottom tab bar replaces the top nav on phones */
    header.app .app-nav { display: none; }

    .tabbar {
      position: fixed;
      left: 0; right: 0; bottom: 0;
      z-index: 50;
      display: flex;
      background: var(--paper);
      border-top: 1px solid var(--hairline);
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
      padding-bottom: env(safe-area-inset-bottom, 0);
    }
    .tabbar .tab {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 3px;
      min-height: 56px;
      padding: 8px 4px;
      color: var(--fog);
      font-size: 11px;
      font-weight: 600;
      border-bottom: none;
      -webkit-tap-highlight-color: transparent;
    }
    .tabbar .tab .tab-icon {
      width: 24px; height: 24px;
      fill: none; stroke: currentColor; stroke-width: 1.8;
      stroke-linecap: round; stroke-linejoin: round;
    }
    .tabbar .tab.active { color: var(--signal-blue); border-bottom: none; }

    /* Header: slimmer, title only (nav moved to the tab bar) */
    header.app { padding: 16px 16px 8px; }
    header.app h1 { font-size: var(--text-heading-sm); }

    /* Tighter page gutters everywhere */
    .controls { padding: 8px 16px 4px; }
    .view-sub { padding: 0 16px; }
    #tables { padding: 12px 16px 24px; }
    .warn { margin: 8px 16px 0; }

    /* Keep content clear of the fixed tab bar */
    body { padding-bottom: calc(64px + env(safe-area-inset-bottom, 0)); }
    .app-footer { padding: 20px 16px 24px; }

    /* Prevent iOS zoom-on-focus (needs >= 16px) and give inputs room to tap */
    input[type="number"], input[type="text"], input[type="search"] { font-size: 16px; }

    /* Comfortable tap targets */
    .symbols button { min-width: 40px; min-height: 40px; font-size: 16px; }
    .icon-btn { width: 26px; height: 20px; }
  }