/* ============================================================
   Gene Structure Viewer — viewer.css
   Light background, navy exons, red highlight, site font sizes.
   Scope: .gsv-* only. No page-level styles.
   ============================================================ */

.gsv-root {
  --gsv-red:     #e5261f;
  --gsv-red-dk:  #a01b16;
  --gsv-black:   #2f2f41;
  --gsv-steel:   #5c5a5a;
  --gsv-border:  #dcdcdc;
  --gsv-surf:    #ffffff;
  --gsv-soft:    #f3f2f2;
  /* exon colours: navy CDS, lighter navy UTR */
  --gsv-cds:     #1e3a5f;
  --gsv-cds-d:   #0d2340;
  --gsv-utr:     #7b9cbf;
  --gsv-utr-d:   #3a6491;
  /* highlight: site red */
  --gsv-hl:      #e5261f;
  --gsv-hl-bg:   rgba(229, 38, 31, 0.08);
}

/* ── card ──────────────────────────────────────────────────────────────── */
.gsv-card {
  border: 1px solid var(--gsv-border);
  border-radius: 6px;
  background: var(--gsv-surf);
  padding: 16px 18px 14px;
}
.gsv-card[hidden] { display: none; }

/* ── card header ───────────────────────────────────────────────────────── */
.gsv-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.gsv-card-gene {
  margin: 0;
  font-size: 1rem;       /* matches site <p> */
  font-weight: 700;
  color: var(--gsv-black);
  line-height: 1.3;
}

.gsv-card-loc {
  margin: .15rem 0 0;
  font-size: .9rem;      /* close to site body */
  color: var(--gsv-steel);
}

.gsv-tx-wrap {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex-shrink: 0;
}

.gsv-label {
  font-size: .78rem;
  font-weight: 700;
  color: var(--gsv-steel);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ── transcript select ─────────────────────────────────────────────────── */
.gsv-select {
  height: 38px;
  padding: 0 8px;
  border: 1px solid var(--gsv-border);
  border-radius: 5px;
  background: var(--gsv-surf);
  color: var(--gsv-black);
  font-family: inherit;
  font-size: .9rem;
  cursor: pointer;
  outline: none;
  min-width: 200px;
  max-width: 380px;
}
.gsv-select:focus { border-color: var(--gsv-red); }

/* ── canvas ────────────────────────────────────────────────────────────── */
.gsv-canvas-wrap { overflow-x: auto; }
.gsv-canvas-wrap canvas { display: block; }

/* ── status ────────────────────────────────────────────────────────────── */
.gsv-status {
  font-size: .9rem;
  color: var(--gsv-steel);
  min-height: 20px;
  margin-bottom: 10px;
}
.gsv-status.gsv-error {
  color: var(--gsv-red-dk);
  font-weight: 600;
}

/* ── legend ────────────────────────────────────────────────────────────── */
.gsv-legend {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  margin-top: 10px;
  font-size: .85rem;     /* close to site body */
  color: var(--gsv-steel);
  align-items: center;
}
.gsv-li   { display: flex; align-items: center; gap: 6px; }
.gsv-sw   { width: 14px; height: 10px; border-radius: 2px; flex-shrink: 0; }
.gsv-sw-line { width: 20px; height: 2px; background: var(--gsv-steel); opacity: .4; flex-shrink: 0; }

/* ── info row ──────────────────────────────────────────────────────────── */
.gsv-info-row {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem 1.25rem;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--gsv-border);
  font-size: .85rem;
  color: var(--gsv-steel);
}

/* ── tooltip ───────────────────────────────────────────────────────────── */
.gsv-tooltip {
  position: fixed;
  background: var(--gsv-surf);
  border: 1px solid var(--gsv-border);
  border-radius: 6px;
  padding: 9px 13px;
  font-size: .85rem;
  color: var(--gsv-black);
  pointer-events: none;
  display: none;
  z-index: 9999;
  line-height: 1.6;
  box-shadow: 0 4px 18px rgba(0,0,0,.10);
  max-width: 280px;
  font-family: inherit;
}
.gsv-tooltip strong { color: var(--gsv-red); display: block; }

/* ── footer ────────────────────────────────────────────────────────────── */
.gsv-footer {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--gsv-border);
  font-size: .82rem;
  color: var(--gsv-steel);
  line-height: 1.6;
}
.gsv-footer a { color: var(--gsv-steel); text-decoration: underline; text-underline-offset: 2px; }
.gsv-footer a:hover { color: var(--gsv-red); }

/* ── responsive ────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .gsv-card-head { flex-direction: column; }
  .gsv-select    { min-width: 0; width: 100%; max-width: none; }
}