:root {
  --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, Menlo, "Cascadia Code", "Fira Mono", Consolas, monospace;
}

/* ── Light theme default ── */
:root {
  --bg:      #f4f5f7;
  --bg2:     #ffffff;
  --bg3:     #eef0f4;
  --border:  #d8dce6;
  --accent:  #2563eb;
  --accent2: #7c3aed;
  --accent3: #059669;
  --text:    #111827;
  --text2:   #374151;
  --text3:   #9ca3af;
  --danger:  #dc2626;
  --warn:    #d97706;
  --shadow:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --radius:  5px;
}

/* ── Dark theme ── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #0f1117;
    --bg2:     #161b27;
    --bg3:     #1e2535;
    --border:  #2a3249;
    --accent:  #4f9cf9;
    --accent2: #a78bfa;
    --accent3: #34d399;
    --text:    #e2e8f0;
    --text2:   #94a3b8;
    --text3:   #4a5568;
    --danger:  #f87171;
    --warn:    #fbbf24;
    --shadow:  0 1px 3px rgba(0,0,0,.4);
  }
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 15.5px;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
header {
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg2);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.logo {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: .4rem;
}

.logo span {
  color: var(--accent);
}

.header-meta {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--text3);
}

/* ── Layout ── */
main {
  display: grid;
  grid-template-columns: 350px minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  flex: 1;
  min-height: 0;
}

/* ── Panel base ── */
.panel {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  overflow-y: auto;
}

.panel-title {
  font-family: var(--mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text3);
  padding: 1rem 1.2rem .65rem;
  border-bottom: 1px solid var(--border);
}

.panel-section {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

#panel-input {
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
}

/* ── Drop zone ── */
.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.35rem .95rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: var(--bg3);
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.dropzone-icon {
  font-size: 1.7rem;
  margin-bottom: .45rem;
  opacity: .45;
}

.dropzone p {
  font-size: .86rem;
  color: var(--text2);
  line-height: 1.5;
}

.dropzone p strong {
  color: var(--accent);
  font-weight: 500;
}

.dropzone input[type=file] {
  display: none;
}

/* ── Or divider ── */
.or-divider {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: .65rem 0;
  font-size: .76rem;
  color: var(--text3);
  font-family: var(--mono);
}

.or-divider::before,
.or-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Textarea ── */
textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--mono);
  font-size: .82rem;
  padding: .65rem .75rem;
  resize: vertical;
  min-height: 105px;
  outline: none;
  transition: border-color .2s;
  line-height: 1.5;
}

textarea::placeholder {
  color: var(--text3);
}

textarea:focus {
  border-color: var(--accent);
}

/* ── Form controls ── */
label.field-label {
  display: block;
  font-size: .78rem;
  color: var(--text2);
  margin-bottom: .45rem;
  font-family: var(--mono);
}

input[type=text],
input[type=number],
select {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--mono);
  font-size: .86rem;
  padding: .5rem .65rem;
  outline: none;
  transition: border-color .2s;
}

input:focus,
select:focus {
  border-color: var(--accent);
}

select option {
  background: var(--bg2);
}

/* ── Toggle ── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}

.toggle-label {
  font-size: .88rem;
  color: var(--text2);
}

.toggle {
  position: relative;
  width: 38px;
  height: 21px;
  flex-shrink: 0;
}

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

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: background .2s, border-color .2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 13px;
  height: 13px;
  left: 3px;
  top: 3px;
  background: var(--text3);
  border-radius: 50%;
  transition: transform .2s, background .2s;
}

.toggle input:checked + .toggle-slider {
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  border-color: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(17px);
  background: var(--accent);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .55rem 1rem;
  border-radius: var(--radius);
  border: none;
  font-family: var(--mono);
  font-size: .86rem;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-primary:disabled {
  opacity: .35;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--text2);
  color: var(--text);
}

.btn-ghost:disabled {
  opacity: .35;
  cursor: not-allowed;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ── Metal tags ── */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .5rem;
}

#metal-tag-list {
  max-height: 150px;
  overflow-y: auto;
  padding-right: .2rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .25rem .6rem;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: .84rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}

.tag:hover {
  border-color: var(--accent2);
  color: var(--text);
}

.tag.active {
  background: color-mix(in srgb, var(--accent2) 12%, transparent);
  border-color: var(--accent2);
  color: var(--accent2);
}

/* ── Results ── */
#panel-results {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  min-height: 0;
  background: var(--bg);
  overflow-y: auto;
  padding: 1.25rem 1.55rem;
  padding-bottom: 410px;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.results-title {
  font-family: var(--mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text3);
}

.export-btns {
  display: flex;
  gap: .4rem;
}

/* ── Result card ── */
.result-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.result-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
}

.result-atom-label {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.result-cn-badge {
  font-family: var(--mono);
  font-size: .78rem;
  padding: .18rem .5rem;
  border-radius: 3px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--accent);
}

/* ── CShM table ── */
.cshm-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: .86rem;
}

.cshm-table th {
  text-align: left;
  padding: .5rem .8rem;
  color: var(--text3);
  font-weight: 500;
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.cshm-table td {
  padding: .5rem .8rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  color: var(--text2);
}

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

.cshm-table tr:hover td {
  background: color-mix(in srgb, var(--accent) 3%, transparent);
}

.cshm-table strong {
  color: var(--text);
  font-weight: 700;
}

.val-good {
  color: var(--accent3);
  font-weight: 600;
}

.val-mid {
  color: var(--warn);
}

.val-poor {
  color: var(--text2);
}

.bar-cell {
  width: 110px;
}

.cshm-bar-bg {
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
}

.cshm-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--accent);
  transition: width .4s ease;
}

/* ── States ── */
.state-empty {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text3);
  font-family: var(--mono);
  font-size: .86rem;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 0 auto .7rem;
}

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

/* ── Status bar ── */
#statusbar {
  height: 28px;
  border-top: 1px solid var(--border);
  background: var(--bg2);
  display: flex;
  align-items: center;
  padding: 0 1.1rem;
  gap: 1.2rem;
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--text3);
}

.status-item {
  display: flex;
  align-items: center;
  gap: .35rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text3);
}

.status-dot.ok {
  background: var(--accent3);
}

.status-dot.err {
  background: var(--danger);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text3);
}

/* ── Ligand list ── */
.ligand-list {
  padding: .65rem .8rem;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--text2);
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  align-items: center;
  border-top: 1px solid var(--border);
}

.ligand-chip {
  display: inline-flex;
  align-items: center;
  gap: .2rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: .16rem .42rem;
  color: var(--text2);
  font-size: .8rem;
}

.symop-tag {
  font-size: .68rem;
  color: var(--accent2);
  background: color-mix(in srgb, var(--accent2) 10%, transparent);
  border-radius: 2px;
  padding: 0 .25rem;
  cursor: help;
}

/* ── Active result card ── */
.result-card.active-card {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

/* ── Viewer-focus tag currently shown in 3D viewer ── */
.tag.viewer-focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ── Per-card view button ── */
.btn-view-sphere {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text3);
  font-size: 1.15rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .15s;
  flex-shrink: 0;
  font-family: var(--mono);
  padding: 0;
  line-height: 1;
}

.btn-view-sphere:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-view-sphere.active {
  border-color: var(--accent);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

/* ── Per-card tolerance slider ── */
.card-tol-row {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .65rem .85rem;
  border-top: 1px solid var(--border);
  background: var(--bg3);
}

.card-tol-label {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--text3);
  white-space: nowrap;
  flex-shrink: 0;
}

.card-tol-slider {
  flex: 1;
  accent-color: var(--accent);
  height: 4px;
  cursor: pointer;
}

.card-tol-value {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--accent);
  font-weight: 600;
  width: 3rem;
  text-align: right;
  flex-shrink: 0;
}

/* ── Geometry badges: compact, readable, no loud blue ─────────────────────── */

.geom-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  padding: .65rem .8rem;
  border-top: 1px solid var(--border);
  background: var(--bg2);
}

.geom-badge {
  font-family: var(--mono);
  font-size: .82rem;
  padding: .24rem .52rem;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text2);
}

.geom-key {
  color: var(--text);
  font-weight: 600;
}

.geom-eq {
  color: var(--text3);
  margin: 0 .18rem;
}

.geom-val {
  color: var(--text);
  font-weight: 600;
}

/* Header badge for best CShM: keep highlight, but less aggressive */
.result-card-header .geom-badge.highlight {
  border-color: color-mix(in srgb, var(--accent3) 30%, var(--border));
  background: color-mix(in srgb, var(--accent3) 7%, var(--bg3));
  color: var(--text);
  font-size: .78rem;
}

.result-card-header .geom-badge.highlight strong {
  color: var(--text);
}

/* Existing highlight class should not force all geometry badges green */
.geom-badge.highlight {
  color: var(--text);
}

/* ── Clickable ligand chips ───────────────────────────────────────────────── */

.ligand-chip {
  cursor: pointer;
  transition: opacity .15s, border-color .15s, background .15s, color .15s, text-decoration-color .15s;
}

.ligand-chip.active {
  border-color: color-mix(in srgb, var(--accent2) 35%, var(--border));
  background: color-mix(in srgb, var(--accent2) 8%, var(--bg3));
  color: var(--text);
}

.ligand-chip.inactive {
  opacity: .42;
  color: var(--text3);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--text3);
}

.ligand-chip.inactive .symop-tag {
  opacity: .55;
}

.ligand-chip:hover {
  border-color: var(--accent);
  color: var(--text);
  opacity: 1;
}

/* ── Collapsible floating 3D viewer ───────────────────────────────────────── */
/* HTML structure:
   #panel-viewer
     #viewer-header
       #viewer-toggle
       .viewer-title
     #viewer-content
       #viewer-placeholder
       #molviewer
*/

/* Keep normal app layout: input left, results right */
main {
  display: grid;
  grid-template-columns: 350px minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  flex: 1;
  min-height: 0;
}

#panel-input {
  grid-column: 1;
  grid-row: 1;
  border-right: 1px solid var(--border);
  border-bottom: none;
  min-height: 0;
  overflow-y: auto;
}

#panel-results {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  padding: 1.25rem 1.55rem;
  padding-bottom: 410px; /* space for open floating viewer */
}

/* Floating viewer frame */
#panel-viewer {
  display: flex !important;
  flex-direction: column;

  position: fixed;
  right: 1.1rem;
  bottom: calc(28px + 1.1rem);

  width: min(520px, 38vw);
  height: 380px;

  grid-column: auto;
  grid-row: auto;

  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(0,0,0,.22);

  z-index: 250;
  overflow: hidden;

  align-items: stretch !important;
  justify-content: flex-start !important;

  opacity: .96;
  transition:
    opacity .15s,
    box-shadow .15s,
    height .18s ease,
    width .18s ease;
}

#panel-viewer:hover {
  opacity: 1;
  box-shadow: 0 10px 34px rgba(0,0,0,.28);
}

/* Header */
#viewer-header {
  height: 30px;
  flex: 0 0 30px;

  display: flex;
  align-items: center;
  gap: .45rem;

  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  color: var(--text2);

  font-family: var(--mono);
  font-size: .78rem;

  padding: 0 .55rem;
  user-select: none;
}

#viewer-toggle {
  width: 22px;
  height: 22px;

  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg2);
  color: var(--accent);

  display: inline-flex;
  align-items: center;
  justify-content: center;

  font-family: var(--mono);
  font-size: .85rem;
  line-height: 1;

  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

#viewer-toggle:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--bg2));
}

#viewer-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
}

.viewer-title {
  color: var(--text2);
  white-space: nowrap;
}

/* Viewer content area.
   This is the important part for 3Dmol sizing. */
#viewer-content {
  flex: 1 1 auto;
  width: 100%;
  min-height: 0;
  position: relative;
  background: var(--bg2);
}

/* 3Dmol container fills viewer-content.
   display is controlled by app.js: none before structure, block after showInViewer(). */
#molviewer {
  position: absolute;
  inset: 0;

  width: 100% !important;
  height: 100% !important;

  display: none;
}

/* Placeholder also fills viewer-content */
#viewer-placeholder {
  position: absolute;
  inset: 0;

  width: 100%;
  height: 100%;
  min-height: 0;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  text-align: center;
  color: var(--text3);
  font-family: var(--mono);
  font-size: .86rem;
  pointer-events: none;
}

#viewer-placeholder .big {
  font-size: 2.4rem;
  margin-bottom: .4rem;
  opacity: .25;
}

/* Collapsed state */
#panel-viewer.collapsed {
  width: 180px;
  height: 30px;
}

#panel-viewer.collapsed #viewer-header {
  border-bottom: none;
}

#panel-viewer.collapsed #viewer-content {
  display: none;
}

/* If panel-viewer is before panel-results in the DOM, reduce reserved bottom
   space when collapsed. If selector does not apply in some layout, harmless. */
#panel-viewer.collapsed ~ #panel-results {
  padding-bottom: 1.25rem;
}

/* Responsive: bottom drawer on smaller screens */
@media (max-width: 980px) {
  main {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
  }

  #panel-input {
    grid-column: 1;
    grid-row: 1;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  #panel-results {
    grid-column: 1;
    grid-row: 2;
    padding-bottom: 345px;
  }

  #panel-viewer {
    left: .8rem;
    right: .8rem;
    bottom: calc(28px + .8rem);

    width: auto;
    height: 315px;
  }

  #panel-viewer.collapsed {
    left: auto;
    right: .8rem;
    width: 180px;
    height: 30px;
  }
}

/* ── Harmonized badges in result-card header ───────────────────────────────── */

.result-card-header > div:first-child {
  align-items: center;
}

/* Common badge geometry */
.result-block-label,
.result-atom-label,
.result-cn-badge {
  display: inline-flex;
  align-items: center;
  height: 1.65rem;
  line-height: 1;
  border-radius: 3px;
  padding: 0 .48rem;
  font-family: var(--mono);
  white-space: nowrap;
}

/* Structure/block name */
.result-block-label {
  font-size: .78rem;
  font-weight: 500;
  color: var(--text2);
  background: var(--bg2);
  border: 1px solid var(--border);
  max-width: 18rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Metal atom label */
.result-atom-label {
  font-size: .86rem;
  font-weight: 700;
  color: var(--text);
  background: color-mix(in srgb, var(--accent2) 7%, var(--bg2));
  border: 1px solid color-mix(in srgb, var(--accent2) 24%, var(--border));
}

/* Coordination number */
.result-cn-badge {
  font-size: .78rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--accent) 10%, var(--bg2));
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  color: var(--accent);
}

/* Active card: slightly clearer, but not too loud */
.result-card.active-card .result-block-label {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 25%, var(--border));
}

.result-card.active-card .result-atom-label {
  border-color: color-mix(in srgb, var(--accent2) 40%, var(--border));
}

.result-card.active-card .result-cn-badge {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
}