Pre-Alpha to Alpha Ready

pre-alpha/SVS-MSP-Calculator-base.css

@@ -0,0 +1,73 @@
+/* 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: 2px 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: 16px;
+  }
+  .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: 1px solid var(--theme-chip-border);
+    border-radius: 8px;
+    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; }
+
+