/* Peptide Workbench — visual language aligned with protein.tacular.dev */

:root {
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --fg: #0f172a;
  --fg-soft: #334155;
  --muted: #64748b;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --accent: #4f46e5;
  --accent-2: #7c3aed;
  --accent-soft: #eef2ff;
  --row-hover: #f1f5f9;
  --row-active: #e0e7ff;

  --aa-hydrophobic: #f0f9ff;
  --aa-polar: #f0fdf4;
  --aa-acidic: #fef2f2;
  --aa-basic: #eff6ff;
  --aa-special: #fefce8;

  --error-bg: #fef2f2;
  --error-fg: #b91c1c;
  --error-border: #fecaca;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 6px 16px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10);
  --gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 55%, #ec4899 100%);

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 22px;
  position: sticky;
  top: 0;
  background: var(--gradient);
  color: white;
  z-index: 10;
  box-shadow: var(--shadow);
}
.topbar h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.topbar h1::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95), rgba(255,255,255,0.55) 35%, rgba(255,255,255,0) 70%),
    conic-gradient(from 200deg, #fcd34d, #f472b6, #60a5fa, #34d399, #fcd34d);
  box-shadow: 0 0 0 2px rgba(255,255,255,0.18), inset 0 0 6px rgba(0,0,0,0.25);
}
.status {
  color: rgba(255, 255, 255, 0.88);
  font-size: 13px;
  flex: 1;
  font-variant-numeric: tabular-nums;
}

/* ---------- App layout (sidebar + detail) ---------- */
main#app {
  display: grid;
  grid-template-columns: 360px 1fr;
  height: calc(100vh - 53px);
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  box-shadow: var(--shadow-sm);
}

.input-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.docs-link {
  text-transform: none;
  letter-spacing: 0;
  color: var(--accent);
  text-decoration: none;
  font-size: 11px;
  font-weight: 500;
}
.docs-link:hover { text-decoration: underline; }

#seqInput {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 13px;
  resize: vertical;
  line-height: 1.5;
  background: white;
  color: var(--fg);
  transition: border-color 0.15s, box-shadow 0.15s;
}
#seqInput:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.settings-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.setting {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
}
.setting select,
.setting input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 13px;
  background: white;
  font-family: inherit;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 500;
  color: var(--fg);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.setting select:focus,
.setting input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.stat-row { display: flex; justify-content: space-between; gap: 8px; }
.stat-row .k { color: var(--muted); }
.stat-row .v { font-weight: 600; font-variant-numeric: tabular-nums; color: var(--fg); }
.stat-row .v.formula { font-family: var(--mono); font-weight: 500; word-break: break-all; }

.parse-error {
  border: 1px solid var(--error-border);
  background: var(--error-bg);
  color: var(--error-fg);
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 12px;
}
.parse-error.big {
  font-size: 14px;
  padding: 14px 16px;
  margin-top: 12px;
}

/* ---------- Detail / tabs ---------- */
.detail {
  padding: 18px 24px 40px;
  overflow-y: auto;
  min-height: 0;
}

.tabs {
  display: flex;
  gap: 2px;
  margin: 0 0 14px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab {
  border: none;
  background: none;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  font-family: inherit;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  border-radius: 6px 6px 0 0;
  white-space: nowrap;
}
.tab:hover { color: var(--fg); background: var(--row-hover); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.section-title {
  margin: 4px 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
  font-weight: 600;
}

/* ---------- Headline strip (Overview tab) ---------- */
.headline-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 16px;
  padding: 12px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.headline-strip::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--gradient);
}
.headline-strip .hl {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 10px 4px 14px;
  border-right: 1px solid var(--border);
  font-size: 12px;
  min-width: 0;
}
.headline-strip .hl:last-child { border-right: none; }
.headline-strip .hl .k {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}
.headline-strip .hl .v {
  font-weight: 700;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}
.headline-strip .hl .v.formula { font-family: var(--mono); font-weight: 600; }

/* pH input embedded in the Charge & stability card. */
.stat-row.pH-row .k {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.stat-row.pH-row input {
  width: 4.5em;
  padding: 2px 6px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-family: var(--mono);
}
.stat-row.pH-row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

/* ---------- Residue pills (inspector) ---------- */
.residue-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 13px;
  background: var(--bg-elev);
  box-shadow: var(--shadow-sm);
}
.pill .pos {
  font-size: 10px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.pill .aa { font-weight: 700; }
.pill .mod-badge {
  font-size: 10px;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
  border-radius: 3px;
  padding: 1px 4px;
  font-family: inherit;
}
.pill.hydrophobic { background: var(--aa-hydrophobic); }
.pill.polar { background: var(--aa-polar); }
.pill.acidic { background: var(--aa-acidic); color: #991b1b; }
.pill.basic { background: var(--aa-basic); color: #1e40af; }
.pill.special { background: var(--aa-special); }
.pill.terminal-mod {
  background: #fef3c7;
  border-color: #fde68a;
  color: #92400e;
}

/* ---------- Info cards (inspector / properties / formula) ---------- */
.inspector-aside {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
.info-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  background: var(--bg-elev);
  box-shadow: var(--shadow-sm);
}
.info-card h4 {
  margin: 0 0 8px;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
}

.flag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}
.flag .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.flag.yes { color: var(--fg); font-weight: 500; }
.flag.yes .dot { background: var(--accent); }
.flag.no { color: var(--muted); }
.flag.no .dot { background: var(--border-strong); }

/* ---------- Generic legend chips ---------- */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 12px;
  color: var(--muted);
  padding: 10px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 8px 0 12px;
  align-items: center;
}
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.legend-square {
  display: inline-block;
  width: 16px; height: 16px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
  line-height: 16px;
  border: 1px solid var(--border);
}
.legend-square.hydrophobic { background: var(--aa-hydrophobic); }
.legend-square.polar { background: var(--aa-polar); }
.legend-square.acidic { background: var(--aa-acidic); color: #991b1b; }
.legend-square.basic { background: var(--aa-basic); color: #1e40af; }
.legend-square.special { background: var(--aa-special); }

.empty { color: var(--muted); font-style: italic; padding: 10px 0; }

/* ---------- Per-tab control bars ---------- */
.tab-controls { margin-bottom: 14px; }
.frag-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}
.frag-controls .ctl {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
}
.frag-controls .ctl.inline {
  flex-direction: row;
  align-items: center;
  gap: 5px;
  text-transform: none;
  letter-spacing: normal;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg);
}
.frag-controls .ctl input[type="number"] {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 13px;
  background: white;
  font-family: inherit;
  width: 9ch;
  color: var(--fg);
  font-weight: 500;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.frag-controls .ctl input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.ion-toggles, .adduct-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.ion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: white;
  box-shadow: var(--shadow-sm);
  transition: transform 0.08s;
}
.ion-toggle:active { transform: translateY(1px); }
.ion-toggle input { margin: 0; }

/* ---------- Plot containers ---------- */
.plot {
  margin: 14px 0;
  min-height: 240px;
  padding: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

/* ---------- Data tables (fragments / isotope / m/z) ---------- */
.table-wrap {
  margin-top: 10px;
  overflow-x: auto;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
}
.data-table th,
.data-table td {
  padding: 6px 10px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
.data-table th {
  background: var(--bg);
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
}
.data-table td:first-child,
.data-table th:first-child { text-align: left; }
.data-table tbody tr { transition: background 0.1s; }
.data-table tbody tr:hover { background: var(--row-hover); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr.out-of-range td { color: var(--muted); background: #fafafa; }

/* ---------- Summary chips ---------- */
.iso-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  padding: 10px 0 0;
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.iso-summary b { color: var(--fg); font-weight: 700; margin-right: 4px; }
.iso-summary code {
  font-family: var(--mono);
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ---------- Properties tab ---------- */
.prop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.prop-grid-wide {
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
}
.prop-note {
  font-size: 11px;
  color: var(--muted);
  margin-top: 8px;
  font-style: italic;
  line-height: 1.4;
}

/* ---------- Scale mini-bars (Properties tab) ---------- */
.scales-card .scale-section + .scale-section { margin-top: 14px; }
.scale-section-heading {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
  margin: 0 0 6px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}
.scale-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 2px;
}
.scale-row {
  display: grid;
  grid-template-columns: minmax(160px, 1.4fr) 5ch 1fr minmax(80px, auto);
  align-items: center;
  gap: 10px;
  font-size: 12px;
}
.scale-name {
  color: var(--fg-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.scale-value {
  font-family: var(--mono);
  font-weight: 600;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--fg);
}
.scale-track {
  position: relative;
  height: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: visible;
}
.scale-track::after {
  /* Centerline so users can see where the mid-range falls. */
  content: "";
  position: absolute;
  top: -2px;
  bottom: -2px;
  left: 50%;
  width: 1px;
  background: var(--border-strong);
}
.scale-fill {
  position: absolute;
  top: -3px;
  width: 4px;
  height: 14px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  transform: translateX(-50%);
  box-shadow: 0 1px 3px rgba(79, 70, 229, 0.4);
}
.scale-range {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 11px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.scale-empty {
  color: var(--muted);
  font-style: italic;
}

/* ---------- Isotope tab niceties ---------- */
.iso-unavailable {
  border-color: var(--border-strong);
  background: var(--bg);
  margin-top: 14px;
}
.iso-unavailable p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- Composition (shared with protein) ---------- */
.composition-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 8px;
}
.comp-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  background: var(--bg-elev);
  box-shadow: var(--shadow-sm);
}
.comp-bar-row {
  display: grid;
  grid-template-columns: 2.5ch 4ch 1fr 4ch;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  margin-bottom: 4px;
  font-family: var(--mono);
}
.comp-bar-row .aa-label { font-weight: 700; }
.comp-bar-row .pct,
.comp-bar-row .count {
  color: var(--muted);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.comp-bar {
  height: 10px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.comp-bar > div {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  transition: width 0.3s;
}
.comp-bar.hydrophobic > div { background: linear-gradient(90deg, #38bdf8, #2563eb); }
.comp-bar.polar > div { background: linear-gradient(90deg, #34d399, #059669); }
.comp-bar.acidic > div { background: linear-gradient(90deg, #fb7185, #be123c); }
.comp-bar.basic > div { background: linear-gradient(90deg, #818cf8, #4338ca); }
.comp-bar.special > div { background: linear-gradient(90deg, #fbbf24, #b45309); }

/* ---------- Responsive: collapse sidebar on small screens ---------- */
@media (max-width: 880px) {
  main#app {
    grid-template-columns: 1fr;
    height: auto;
  }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .detail { padding-bottom: 60px; }
}