/* ── CSS Variables ─────────────────────────────────────────────────────────── */
:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-raised: #f6f8fa;
  --surface-hover: #f3f4f6;
  --border: #d0d7de;
  --border-subtle: #e5e7eb;

  --accent: #0969da;
  --accent-hover: #0550ae;
  --accent-muted: rgba(9, 105, 218, 0.1);

  --teal: #1a7f37;
  --teal-muted: rgba(26, 127, 55, 0.1);
  --amber: #9a6700;
  --amber-muted: rgba(154, 103, 0, 0.1);
  --red: #cf222e;
  --red-muted: rgba(207, 34, 46, 0.1);
  --green: #1a7f37;
  --green-muted: rgba(26, 127, 55, 0.1);

  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --text-muted: #9198a1;

  --node-source: #0969da;
  --node-target: #1a7f37;
  --node-intermediate: #9a6700;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  --transition: 0.15s ease;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

/* ── Reset & Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── App Header ────────────────────────────────────────────────────────────── */
.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.app-logo svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}

.health-badge {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 500;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--surface-raised);
  transition: var(--transition);
  white-space: nowrap;
}

.health-badge.ok {
  color: var(--green);
  border-color: rgba(34, 197, 94, 0.3);
  background: var(--green-muted);
}

.health-badge.err {
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.3);
  background: var(--red-muted);
}

/* ── Tab Bar ───────────────────────────────────────────────────────────────── */
.tab-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 56px;
  z-index: 99;
}

.tab-bar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  gap: 0;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: -1px;
}

.tab-btn:hover { color: var(--text-primary); background: var(--surface-hover); }

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-btn svg { width: 16px; height: 16px; }

/* ── Main Layout ───────────────────────────────────────────────────────────── */
.app-main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Cards ─────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* ── Two-column molecule input ─────────────────────────────────────────────── */
.mol-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 768px) {
  .mol-inputs { grid-template-columns: 1fr; }
}

.mol-input-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mol-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 20px;
  width: fit-content;
}

.mol-badge.source {
  color: var(--accent);
  background: var(--accent-muted);
  border: 1px solid rgba(9,105,218,0.3);
}

.mol-badge.target {
  color: var(--teal);
  background: var(--teal-muted);
  border: 1px solid rgba(26,127,55,0.3);
}

.mol-preview {
  background: white;
  border-radius: var(--radius-sm);
  min-height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.mol-preview svg { width: 100%; height: auto; }

.mol-preview-placeholder {
  color: #aaa;
  font-size: 12px;
  text-align: center;
  padding: 1rem;
}

.mol-preview-error {
  color: var(--red);
  font-size: 11px;
  padding: 0.5rem;
  text-align: center;
}

/* ── Form controls ─────────────────────────────────────────────────────────── */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

input[type="text"],
input[type="number"],
textarea,
select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-sans);
  padding: 0.5rem 0.75rem;
  width: 100%;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

input[type="text"].smiles-input,
textarea.smiles-input {
  font-family: var(--font-mono);
  font-size: 12px;
}

input[type="number"] { width: 100px; }

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

/* ── Toggle Switch ─────────────────────────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.toggle-row:last-child { border-bottom: none; }

.toggle-label {
  font-size: 13px;
  color: var(--text-primary);
}

.toggle-label small {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 1px;
}

.toggle {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--surface-hover);
  border: 1px solid var(--border);
  border-radius: 22px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}

.toggle input:checked + .toggle-slider {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(18px) translateY(-50%);
  background: white;
}

/* ── Slider ────────────────────────────────────────────────────────────────── */
.slider-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-subtle);
  gap: 1rem;
}

.slider-row:last-child { border-bottom: none; }

.slider-label {
  font-size: 13px;
  color: var(--text-primary);
  flex: 1;
  min-width: 0;
}

.slider-label small {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
}

.slider-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  background: var(--border);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg);
  cursor: pointer;
}

.slider-value {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  width: 3.5rem;
  text-align: right;
  flex-shrink: 0;
}

/* ── Number row ────────────────────────────────────────────────────────────── */
.number-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
  gap: 1rem;
}

.number-row:last-child { border-bottom: none; }

.number-row input[type="number"] {
  width: 90px;
  text-align: right;
  flex-shrink: 0;
}

/* ── Collapsible param sections ────────────────────────────────────────────── */
.param-section {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.param-section-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-raised);
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: background var(--transition);
  border: none;
  width: 100%;
  text-align: left;
}

.param-section-header:hover { background: var(--surface-hover); }

.param-section-header .chevron {
  margin-left: auto;
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
  color: var(--text-muted);
}

.param-section-header.open .chevron { transform: rotate(180deg); }

.param-section-body {
  padding: 0.75rem 1rem;
  display: none;
  background: var(--surface);
}

.param-section-body.open { display: block; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-secondary {
  background: var(--surface-raised);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) { background: var(--surface-hover); }

.btn-danger {
  background: var(--red-muted);
  color: var(--red);
  border: 1px solid rgba(239,68,68,0.3);
}
.btn-danger:hover:not(:disabled) { background: rgba(239,68,68,0.2); }

.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 12px;
}

.btn-icon { padding: 0.45rem; }

.btn svg { width: 15px; height: 15px; }

/* Generate / Submit row */
.action-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 0;
}

/* ── Spinner ───────────────────────────────────────────────────────────────── */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

.spinner-wrap {
  display: none;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 13px;
}

.spinner-wrap.visible { display: flex; }

/* ── Alert / Toast ─────────────────────────────────────────────────────────── */
.alert {
  display: none;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-top: 0.75rem;
  border: 1px solid;
}

.alert.visible { display: block; }
.alert.success { background: var(--green-muted); color: var(--green); border-color: rgba(34,197,94,0.3); }
.alert.error   { background: var(--red-muted); color: var(--red); border-color: rgba(239,68,68,0.3); }
.alert.info    { background: var(--accent-muted); color: var(--accent); border-color: rgba(99,102,241,0.3); }

/* ── Graph container ───────────────────────────────────────────────────────── */
.graph-section {
  display: none;
}

.graph-section.visible { display: block; }

.graph-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 1rem;
  min-height: 520px;
}

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

.cy-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  min-height: 480px;
}

#cy-pair, #cy-map {
  width: 100%;
  height: 100%;
  min-height: 480px;
}

.cy-toolbar {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  display: flex;
  gap: 0.35rem;
  z-index: 10;
}

.graph-stats {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  font-size: 11px;
  color: var(--text-muted);
  background: rgba(246,248,250,0.85);
  border: 1px solid var(--border-subtle);
  padding: 3px 8px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
  pointer-events: none;
}

/* ── Node info sidebar ─────────────────────────────────────────────────────── */
.node-sidebar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow-y: auto;
}

.sidebar-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 200px;
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  gap: 0.5rem;
}

.sidebar-placeholder svg {
  width: 32px;
  height: 32px;
  opacity: 0.4;
}

.node-mol-preview {
  background: white;
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  text-align: center;
}

.node-mol-preview svg { max-width: 100%; height: auto; }

.node-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 12px;
}

.node-type-badge.source       { color: var(--accent); background: var(--accent-muted); }
.node-type-badge.target       { color: var(--teal); background: var(--teal-muted); }
.node-type-badge.intermediate { color: var(--amber); background: var(--amber-muted); }

.node-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.smiles-box {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.6rem;
  word-break: break-all;
  cursor: text;
  user-select: all;
}

.props-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.prop-item {
  background: var(--surface-raised);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
}

.prop-item .prop-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.prop-item .prop-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* ── Dropzone ──────────────────────────────────────────────────────────────── */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--accent);
  background: var(--accent-muted);
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-icon {
  width: 32px;
  height: 32px;
  color: var(--text-muted);
  margin: 0 auto 0.5rem;
}

.dropzone-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.dropzone-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.dropzone-filename {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-top: 0.5rem;
  font-weight: 500;
}

/* ── Jobs table ────────────────────────────────────────────────────────────── */
.jobs-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead {
  background: var(--surface-raised);
  border-bottom: 1px solid var(--border);
}

th {
  padding: 0.65rem 1rem;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  white-space: nowrap;
}

td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

tr:last-child td { border-bottom: none; }

tbody tr:hover { background: var(--surface-hover); }

.job-id-cell {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Status badges ─────────────────────────────────────────────────────────── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 12px;
}

.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.status-queued     { color: var(--text-secondary); background: var(--surface-raised); }
.status-running    { color: var(--amber); background: var(--amber-muted); animation: pulse 1.5s infinite; }
.status-completed  { color: var(--green); background: var(--green-muted); }
.status-done       { color: var(--green); background: var(--green-muted); }
.status-failed     { color: var(--red); background: var(--red-muted); }
.status-cancelled  { color: var(--text-muted); background: var(--surface-raised); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ── Section header row ────────────────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ── Legend ────────────────────────────────────────────────────────────────── */
.graph-legend {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 12px;
  color: var(--text-secondary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 2px solid;
}

.legend-dot.source       { background: var(--accent-muted); border-color: var(--node-source); }
.legend-dot.target       { background: var(--teal-muted); border-color: var(--node-target); }
.legend-dot.intermediate { background: var(--amber-muted); border-color: var(--node-intermediate); }

/* ── Progress bar ──────────────────────────────────────────────────────────── */
.progress-text {
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Utility ───────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 0.75rem 0;
}

/* ── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Card title row (with side actions) ────────────────────────────────────── */
.card-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-title-row .card-title { margin-bottom: 0; }

.mol-card-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ── Mode toggle (SMILES / SDF) ────────────────────────────────────────────── */
.mode-toggle {
  display: flex;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}

.mode-btn {
  padding: 0.28rem 0.75rem;
  border-radius: calc(var(--radius-sm) - 2px);
  border: none;
  background: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.mode-btn.active {
  background: var(--accent);
  color: white;
}

.mode-btn:not(.active):hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

/* ── Compact dropzone for pair SDF input ───────────────────────────────────── */
.dropzone-sm {
  padding: 1rem;
}

.dropzone-sm .dropzone-icon {
  width: 22px;
  height: 22px;
  margin-bottom: 0.25rem;
}

.dropzone-sm .dropzone-text { font-size: 13px; }

/* ── 3Dmol.js viewer ───────────────────────────────────────────────────────── */
.mol-3d-viewer {
  width: 100%;
  height: 220px;
  position: relative;
  background: white;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

/* ── Overlay selection names ───────────────────────────────────────────────── */
.overlay-names {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.25rem;
}

/* ── Edge MCS highlight info ───────────────────────────────────────────────── */
.edge-mcs-info {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.mcs-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 11px;
}

.mcs-legend-item {
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}

.mcs-common  { color: #1a7f37; background: rgba(26,127,55,0.12); }
.mcs-deleted { color: #cf222e; background: rgba(207,34,46,0.12); }
.mcs-inserted { color: #0969da; background: rgba(9,105,218,0.12); }

.mcs-mol-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.mcs-mol-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.mcs-mol-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
}

.mcs-mol-svg {
  background: white;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  text-align: center;
}

.mcs-mol-svg svg {
  width: 100%;
  height: auto;
}