:root {
  --bg: #0c0f14;
  --bg-elevated: #141a24;
  --bg-input: #0e131c;
  --border: rgba(94, 234, 212, 0.12);
  --accent: #5eead4;
  --accent-dim: rgba(94, 234, 212, 0.55);
  --text: #e8edf5;
  --text-muted: #8b98ab;
  --danger: #f87171;
  --conserved: rgba(94, 234, 212, 0.15);
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  --radius: 12px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(94, 234, 212, 0.08), transparent),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(56, 189, 248, 0.06), transparent),
    var(--bg);
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

header.hero {
  text-align: center;
  margin-bottom: 2rem;
}

header.hero h1 {
  margin: 0 0 0.35rem;
  font-weight: 700;
  font-size: clamp(1.65rem, 4vw, 2.15rem);
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #f0fdfa 0%, var(--accent) 55%, #38bdf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

header.hero .hero-guide {
  max-width: 44rem;
  margin: 0.75rem auto 0;
  text-align: left;
}

header.hero .hero-guide p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.58;
}

header.hero .hero-guide p + p {
  margin-top: 0.85rem;
}

header.hero .hero-guide a {
  color: var(--accent);
  font-weight: 600;
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: var(--shadow);
}

.panel + .panel {
  margin-top: 1.25rem;
}

.field-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dim);
  margin-bottom: 0.45rem;
}

.field-hint {
  margin: 0.35rem 0 0.75rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.form-span-2 {
  grid-column: 1 / -1;
}

@media (max-width: 720px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.cts-input,
.cts-select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.cts-input[type="number"] {
  font-family: var(--font-mono);
}

.cts-input:focus,
.cts-select:focus {
  outline: none;
  border-color: rgba(94, 234, 212, 0.45);
  box-shadow: 0 0 0 3px rgba(94, 234, 212, 0.12);
}

.cts-slider-val {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.toolbar--secondary {
  margin: 0.5rem 0 0.75rem;
}

.btn-primary {
  padding: 0.65rem 1.35rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  color: #042f2e;
  background: linear-gradient(135deg, #5eead4 0%, #2dd4bf 50%, #22d3ee 100%);
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
}

.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.6;
  cursor: wait;
}

.btn-secondary {
  padding: 0.5rem 1rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.btn-secondary:hover:not(:disabled) {
  border-color: rgba(94, 234, 212, 0.45);
}

.stats-row {
  margin-top: 0.85rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.stats-row .error {
  color: var(--danger);
}

.cts-species-heading {
  margin: 1.25rem 0 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
}

.cts-species-tss-block:first-child .cts-species-heading {
  margin-top: 0;
}

.cts-tss-table-wrap,
.cts-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-input);
}

.cts-tss-table,
.cts-results {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.cts-tss-table th,
.cts-tss-table td,
.cts-results th,
.cts-results td {
  padding: 0.5rem 0.6rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.cts-tss-table th,
.cts-results th {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-dim);
}

.cts-sort-th {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  color: inherit;
  cursor: pointer;
}

.cts-sort-th:hover {
  color: var(--accent);
}

.cts-sort-th--active {
  color: var(--accent);
}

.cts-sort-th::after {
  content: "↕";
  font-size: 0.65rem;
  opacity: 0.45;
}

.cts-sort-th--asc::after {
  content: "↑";
  opacity: 1;
}

.cts-sort-th--desc::after {
  content: "↓";
  opacity: 1;
}

.cts-sp3-col.cts-sp3-col--hidden {
  display: none;
}

.cts-results .cts-sp3-col--hidden {
  display: none;
}

#sp3TssBlock.cts-sp3-block--hidden {
  display: none;
}

.cts-tss-table tbody tr {
  cursor: pointer;
}

.cts-tss-table tbody tr:hover {
  background: rgba(94, 234, 212, 0.05);
}

.cts-tss-row--selected,
.cts-row--conserved {
  background: var(--conserved);
}

.cts-tss-col-select {
  width: 3rem;
  text-align: center;
}

.cts-acc-list,
.cts-tss-list {
  margin: 0;
  padding-left: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.cts-tss-list {
  list-style: none;
  padding: 0;
}

.cts-method {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.cts-pick-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cts-pick-btn {
  text-align: left;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.cts-pick-btn:hover {
  border-color: rgba(94, 234, 212, 0.45);
}

.cts-align-out {
  margin: 0.5rem 0 0.5rem;
  padding: 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.45;
}

.cts-align-legend {
  margin-top: 0.35rem;
}

.cts-block-sep {
  color: #fbbf24;
  font-weight: 700;
  padding: 0 0.1rem;
}

.cts-aln-gap {
  color: rgba(139, 152, 171, 0.55);
  background: rgba(251, 191, 36, 0.08);
}

#alignStats {
  margin: 0.25rem 0 0.5rem;
  color: var(--accent-dim);
}

.cts-align-chunk {
  margin-bottom: 0.5rem;
}

.cts-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 1rem;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

footer.note {
  margin-top: 2rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

footer.note a {
  color: var(--accent);
}