/* DNA Sequence Analyzer — Custom Styles */

.layout-main { max-width: 900px; margin: 0 auto; }

.seq-textarea {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  resize: vertical;
  min-height: 100px;
  letter-spacing: 1px;
}

.example-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.stat-card {
  text-align: center;
  padding: var(--space-4);
}

.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 800;
}

.stat-card .stat-value.accent {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gc-gauge {
  height: 12px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
  position: relative;
}

.gc-gauge-fill {
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #3b82f6);
  border-radius: 99px;
  transition: width 0.6s cubic-bezier(0.25, 1, 0.5, 1);
  width: 0%;
}

.nucleotide-counts {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.nt-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  min-width: 60px;
}

.nt-letter { font-weight: 900; font-size: 1.3rem; }
.nt-count { font-size: 0.85rem; color: var(--color-text-secondary); margin-top: 2px; }
.nt-a { background: rgba(34,197,94,0.15); color: #22c55e; }
.nt-t { background: rgba(239,68,68,0.15); color: #ef4444; }
.nt-g { background: rgba(59,130,246,0.15); color: #3b82f6; }
.nt-c { background: rgba(245,158,11,0.15); color: #f59e0b; }

.seq-display {
  font-family: 'Courier New', monospace;
  font-size: 0.8rem;
  word-break: break-all;
  background: rgba(0,0,0,0.2);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  max-height: 80px;
  overflow-y: auto;
  letter-spacing: 1.5px;
  color: var(--color-text-secondary);
}

.strand-box { margin-bottom: 4px; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: var(--space-4);
  align-items: start;
}

.codon-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.codon-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  min-width: 50px;
  transition: all 0.2s;
}

.codon-chip:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.codon-chip.start { border-color: #22c55e; background: rgba(34,197,94,0.1); }
.codon-chip.stop { border-color: #ef4444; background: rgba(239,68,68,0.1); }

.codon-code { font-family: monospace; font-weight: 700; font-size: 0.75rem; }
.codon-aa { font-size: 0.7rem; color: var(--color-text-secondary); margin-top: 2px; }

.helix-card { display: flex; flex-direction: column; align-items: center; }

.helix-canvas {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.3);
}

.orf-item {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  font-size: 0.85rem;
}

.orf-item:hover { background: rgba(255,255,255,0.06); }

.error-msg {
  color: #ef4444;
  font-size: 0.85rem;
  font-weight: 500;
}

@media (max-width: 700px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .nucleotide-counts { flex-wrap: wrap; }
}