/* ============================================================================
   theme.css — bootleg zemax v3, original (v2) visual style.
   Professional light theme: white, Inter/system sans, blue accent, soft gray
   rules — matching the v2 tool's design system, applied to v3's markup.

   Palette (mirrored as constants in plots.js — keep in sync):
     bg #ffffff   bg-subtle #f8f9fa   border #e1e4e8 / #d0d4d9
     text #1f2328 / #57606a / #8b949e
     accent #2563eb   success #059669   warning #d97706   error #dc2626
     fields #2563eb  #059669  #dc2626  #7c3aed
   ==========================================================================*/

:root {
  --color-bg: #ffffff;
  --color-bg-subtle: #f8f9fa;
  --color-bg-muted: #f1f3f5;
  --color-border: #e1e4e8;
  --color-border-strong: #d0d4d9;

  --color-text-primary: #1f2328;
  --color-text-secondary: #57606a;
  --color-text-muted: #8b949e;

  --color-accent: #2563eb;
  --color-accent-subtle: #dbeafe;
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Menlo', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  padding: 32px;
  -webkit-font-smoothing: antialiased;
}

.sheet {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

/* ---- header ---- */
.masthead {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 4px;
}
.masthead h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-transform: none;
}
.masthead .sub {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}
.masthead .mark { display: none; }

.conventions {
  background: var(--color-bg-subtle);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 4px 4px 0;
  padding: 12px 16px;
  margin: 12px 0 8px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}
.conventions b { color: var(--color-text-primary); font-weight: 500; }

/* ---- section headings ---- */
h2.sec {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 24px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}
h2.sec::after { content: none; }
h2.sec .no { display: none; }

h3 {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin: 16px 0 8px;
}

/* ---- forms ---- */
.cfg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px 32px; }
.cfg-row { display: flex; align-items: center; gap: 12px; margin: 6px 0; flex-wrap: wrap; }
.cfg-row label { min-width: 130px; color: var(--color-text-secondary); font-size: 0.8125rem; }
.hint { font-size: 0.75rem; color: var(--color-text-muted); }

input[type="text"], input[type="number"] {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-primary);
  padding: 6px 10px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  width: 130px;
  transition: border-color 0.15s ease;
}
select {
  background: var(--color-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.8125rem;
  cursor: pointer;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}
input.invalid { border-color: var(--color-error); background: #fef2f2; }
input[type="checkbox"] { width: auto; accent-color: var(--color-accent); }

/* ---- buttons ---- */
button {
  background: var(--color-text-primary);
  color: var(--color-bg);
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  margin: 2px 8px 2px 0;
  transition: background-color 0.15s ease;
}
button:hover { background: var(--color-text-secondary); }
button.quiet {
  background: var(--color-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}
button.quiet:hover { background: var(--color-bg-subtle); }
button.primary { background: var(--color-success); color: #fff; }
button.primary:hover { background: #047857; }
button.danger { background: var(--color-error); color: #fff; }
button.danger:hover { background: #b91c1c; }

/* ---- prescription table ---- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}
th, td {
  padding: 8px 12px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
thead th {
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-top: none;
}
tbody tr:hover td { background: var(--color-bg-subtle); }
tbody tr:last-child td { border-bottom: 1px solid var(--color-border); }
td input { width: 100%; min-width: 56px; padding: 4px 6px; }
td.rownum { font-size: 0.75rem; color: var(--color-text-muted); }
tr.stop-row td.rownum { color: var(--color-accent); font-weight: 700; }

table.data td { font-family: var(--font-mono); font-size: 0.75rem; }
table.data td.lab { font-family: var(--font-sans); text-align: left; font-size: 0.8125rem; }
table.data tfoot td { border-top: 2px solid var(--color-border-strong); font-weight: 600; }

/* ---- status line ---- */
.statusline {
  padding: 8px 16px;
  border-radius: 4px;
  border-left: 3px solid var(--color-accent);
  background: #eff6ff;
  color: #1e40af;
  margin: 14px 0;
  font-size: 0.8125rem;
}
.statusline::before { content: none; }
.statusline.ok { background: #ecfdf5; border-left-color: var(--color-success); color: #065f46; }
.statusline.err { background: #fef2f2; border-left-color: var(--color-error); color: #991b1b; }
.statusline.busy { background: #fffbeb; border-left-color: var(--color-warning); color: #92400e; }

/* ---- metrics strip ---- */
.metrics { display: flex; gap: 12px; flex-wrap: wrap; margin: 6px 0; }
.metric {
  padding: 8px 16px;
  background: var(--color-bg-subtle);
  border-radius: 4px;
  border-right: none;
  margin-right: 0;
}
.metric .k {
  color: var(--color-text-muted);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: block;
}
.metric .v {
  font-size: 1rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.metric .u { font-size: 0.6875rem; color: var(--color-text-muted); }

/* ---- tabs ---- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  margin-top: 20px;
  flex-wrap: wrap;
}
.tab {
  padding: 8px 16px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  margin: 0 0 -1px 0;
  text-transform: none;
  letter-spacing: normal;
}
.tab:hover { color: var(--color-text-secondary); background: transparent; }
.tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 500;
}
.tab .n { display: none; }

.tabpane { display: none; padding: 24px 0 8px; }
.tabpane.active { display: block; }

/* ---- figure blocks ---- */
.fig-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.figure {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 8px;
  background: var(--color-bg);
}
.figure .caption {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 6px 4px 2px;
  border-top: 1px solid var(--color-border);
  margin-top: 6px;
  font-variant-numeric: tabular-nums;
}
.figure .caption b { font-family: var(--font-mono); color: var(--color-text-secondary); }
.bz-fan-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.bz-empty { color: var(--color-text-muted); font-style: italic; padding: 40px; text-align: center; }
canvas { display: block; }

pre.result {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  white-space: pre-wrap;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 12px 14px;
  max-height: 420px;
  overflow-y: auto;
}

/* validation checks */
.check { display: flex; gap: 12px; padding: 9px 2px; border-bottom: 1px solid var(--color-border); align-items: baseline; }
.check .badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 3px;
  min-width: 52px;
  text-align: center;
  color: #fff;
}
.check .badge.pass { background: var(--color-success); }
.check .badge.warn { background: var(--color-warning); }
.check .badge.fail { background: var(--color-error); }
.check .name { font-weight: 600; min-width: 210px; font-size: 0.8125rem; }
.check .detail { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-secondary); }
.check .note { font-size: 0.75rem; color: var(--color-text-muted); font-style: italic; }

/* zernike bars */
.zbar { display: inline-block; height: 8px; background: var(--color-accent); vertical-align: middle; border-radius: 1px; }
.zbar.neg { background: var(--color-error); }

/* ---- tooltip ---- */
.bz-tooltip {
  position: fixed;
  display: none;
  z-index: 9999;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  line-height: 1.55;
  padding: 7px 10px;
  max-width: 300px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}
.bz-tooltip-head {
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 4px;
  padding-bottom: 2px;
}
.bz-tooltip b { color: var(--color-text-primary); }

/* ---- controls row ---- */
.ctl { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; font-size: 0.8125rem; }
.ctl label { display: inline-flex; gap: 5px; align-items: center; color: var(--color-text-secondary); }

/* ---- title block footer: not part of the original style ---- */
.titleblock { display: none; }

/* ---- print ---- */
@media print {
  body { padding: 0; font-size: 11px; }
  button, .ctl, .statusline, .tabs { display: none !important; }
  .tabpane { display: block !important; page-break-inside: avoid; }
}

@media (max-width: 900px) {
  .cfg-grid { grid-template-columns: 1fr; }
}