/* SVS MSP Calculator - Base */
/* Extracted during Phase 5 to keep the HTML shell stable while splitting the monolithic stylesheet. */
  body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'Lato', sans-serif;
    font-size: var(--text-body-size);
    line-height: var(--text-body-line);
    min-height: 100vh;
  }

  /* ── TOP BAR ────────────────────────────────────────────────────
     Sticky header. z-index:100 sits below mobile panel (z:300)
     and mobile pill (z:200). Background is --ink (cream) not --paper.
     Contains: SVS logo SVG (inline) | quote ref + date (DM Mono).
  ─────────────────────────────────────────────────────────────── */
  .top-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--top-bar-bg);
    border-bottom: var(--border-medium) solid var(--top-bar-border);
    box-shadow: var(--top-bar-shadow);
    padding: 14px 0;
    display: flex;
    justify-content: center;
  }
  .top-bar-inner {
    width: 100%;
    max-width: var(--page-max-width);
    padding: 0 var(--page-gutter-x);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-stack-roomy);
  }
  .top-bar-logo { margin-left: clamp(26px, 5.2vw, 78px); flex-shrink: 0; }
  .top-bar-right {
    font-family: 'DM Mono', monospace;
    font-size: var(--text-meta-size);
    letter-spacing: 0.07em;
    color: var(--top-bar-meta);
    text-align: right;
    line-height: 1.55;
    margin-left: auto;
  }

  /* ── THEME TOGGLE BUTTON ────────────────────────────────────────
     Sits to the right of the quote ref/date in .top-bar-inner.
     Slightly darker chip vs the cream top-bar bg so it reads as
     a distinct control, not noise. Works on both theme top-bars.
  ─────────────────────────────────────────────────────────────── */
  .theme-toggle-btn {
    background: var(--theme-chip-bg);
    border: var(--border-thin) solid var(--theme-chip-border);
    border-radius: var(--radius-md);
    width: 36px;
    height: 36px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--theme-chip-fg);
    transition: background var(--transition-fast);
    flex-shrink: 0;
    margin-left: 14px;
    box-shadow: var(--theme-chip-shadow);
  }
  .theme-toggle-btn:hover  { background: var(--theme-chip-hover); }
  .theme-toggle-btn:active { background: var(--theme-chip-active); }
  .theme-toggle-btn svg    { display: block; }