/* ── Medium screens: compact tab bar so all tabs fit ── */
@media (max-width: 960px) {
  .tabbar-spacer { display: none; }
  .tabbar-sep    { display: none; }
  .tabbar { padding: 0 0.5rem; }
  .tab-btn {
    padding: 0 0.9rem;
    font-size: 0.72rem;
    letter-spacing: .06em;
  }
}

/* ── Very narrow: icon-only tabs to prevent overflow clipping ── */
@media (max-width: 600px) {
  .tab-btn span { display: none; }
  .tab-btn {
    padding: 0 0.65rem;
    gap: 0;
  }
}

/* ── Mobile / narrow-screen overrides ── */
@media (max-width: 768px) {

  /* Allow page to scroll vertically on mobile instead of clipping to 100vh */
  html, body {
    height: auto;
    overflow: auto;
    overflow-x: hidden;
  }

  /* ── Header: shorter, tighter padding ── */
  header {
    height: 56px;
    padding: 0 1rem;
    gap: 0.65rem;
  }
  .header-title { font-size: 1.05rem; }
  .header-sub   { display: none; }

  /* ── Tab bar: tighter padding on small screens ── */
  .tabbar {
    padding: 0 0.5rem;
  }
  .tab-btn {
    padding: 0 1rem;
    font-size: 0.72rem;
    letter-spacing: .06em;
  }

  /* ── Main area: allow natural height so content scrolls ── */
  .main { overflow: visible; min-height: 0; }

  /* ── Tab panels: stack vertically, auto height ── */
  .tab-panel { display: none; flex-direction: column; }
  .tab-panel.active {
    display: flex;
    flex-direction: column;
    overflow: visible;
    height: auto;
  }

  /* ── Generate layout: single column, no resize handle ── */
  .gen-layout {
    display: flex;
    flex-direction: column;
    overflow: visible;
  }
  .rtp-resize-handle { display: none; }

  /* ── RTP layout: single column, no resize handle ── */
  .rtp-layout {
    display: flex;
    flex-direction: column;
    overflow: visible;
  }

  /* ── Spin Test layout: single column ── */
  .spin-test-layout {
    display: flex;
    flex-direction: column;
    overflow: visible;
  }

  /* ── Form column & output column: natural height ── */
  .form-col,
  .output-col,
  .rtp-config-col,
  .rtp-result-col,
  .spin-test-nav,
  .spin-test-output-col {
    overflow: visible;
    height: auto;
    min-height: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  /* Last pane in each split has no extra bottom border */
  .output-col,
  .rtp-result-col,
  .spin-test-output-col {
    border-bottom: none;
  }

  /* ── Form scroll: natural height instead of flex-overflow ── */
  .form-scroll {
    overflow: visible;
    height: auto;
    padding: 0.75rem 1rem 1rem;
  }

  /* ── Output body / result bodies: natural height ── */
  .output-body,
  .rtp-result-body,
  .spin-test-results-body {
    overflow: visible;
    height: auto;
  }

  /* ── RTP symbol row: allow wrapping ── */
  .rtp-sym-header,
  .rtp-sym-row {
    grid-template-columns: 32px 90px 1fr 28px;
    gap: 0.25rem;
    padding: 0.35rem 0.5rem;
    font-size: 0.68rem;
  }

  /* ── Wild multiplier fields: remove the fixed left padding ── */
  .rtp-wild-fields {
    padding-left: 0;
  }

  /* ── Modals: full-width on small screens ── */
  .modal {
    width: 96vw;
    max-height: 90vh;
  }

  /* ── Info key column: shorter min-width ── */
  .info-key { min-width: 100px; }

  /* ── Field grid: single column on very narrow screens ── */
  .field-grid { grid-template-columns: 1fr; }

  /* ── Convert tab: stack panes vertically ── */
  .conv-layout { overflow: visible; padding: 0.75rem 1rem 1rem; }
  .conv-split {
    grid-template-columns: 1fr;
    overflow: visible;
    min-height: 0;
  }
  .pane-body { min-height: 220px; }

  /* ── CodeMirror editors: fixed height so they're scrollable ── */
  .CodeMirror { height: 220px !important; }

  /* ── Buttons: minimum tap target ── */
  .run-btn { height: 36px; padding: 0 1.25rem; font-size: 0.78rem; }
  .icon-btn { width: 32px; height: 32px; }
  .theme-btn { width: 36px; height: 36px; }
  .info-btn  { width: 36px; height: 36px; }

  /* ── Spin screen cells: slightly smaller ── */
  .spin-screen-col { min-width: 30px; }
  .spin-screen-cell { width: 30px; height: 26px; font-size: 0.72rem; }
}

/* ── Extra-narrow (phones ≤ 480px) ── */
@media (max-width: 480px) {
  .header-title { font-size: 0.95rem; }
  .logo { width: 36px; height: 36px; }

  .rtp-sym-header,
  .rtp-sym-row {
    grid-template-columns: 28px 80px 1fr 26px;
    gap: 0.2rem;
    padding: 0.3rem 0.4rem;
  }
  .info-key { min-width: 80px; }

  .rtp-big-number { font-size: 2.6rem; }
}