:root{
  --bg: #f6f8fa;
  --card: #ffffff;
  --accent: #2b6cb0;
  --accent-2: #2c7be5;
  --text: #1f2937;
  --muted: #6b7280;
  --shadow: 0 8px 24px rgba(15,23,42,0.06);
  --radius: 10px;
}

*{box-sizing:border-box;}

body{
  margin:0;
  padding:28px 28px 120px;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
  display:flex;
  flex-direction:column;
  align-items:center;
  min-height:100vh;
}

.page-content{
  max-width:1100px;
  width:94%;
  margin:0 auto;
}

.info {
    max-width: none;
    margin-top: 8px;
    color: #374151;
    font-size: 1rem;
}

h2{
  margin:6px 0 12px;
  color:var(--accent-2);
  font-weight:600;
  font-size:2.15rem;
}

.page-content h3{
  margin:28px 0 10px;
  color: var(--accent-2);
  font-size: 1.35rem;
}

.info-list{
  max-width:none;
  margin-top:8px;
  color:#374151;
  font-size:1rem;
}

.example-quote{
  border-left: 4px solid #2c7be5;
  padding: 12px 16px;
  margin: 20px 0;
  background-color: #f6f8fa;
  font-style: italic;
  color: #374151;
  border-radius: 0 10px 10px 0;
}

.wrap{
  width:100%;
  max-width:none;
}

textarea{
  width:100%;
  min-height:140px;
  padding:12px;
  font-size:1rem;
  border:1px solid #d1d5db;
  border-radius:10px;
  font:inherit;
  color:inherit;
  background:#fff;
}

button{
  padding:12px;
  border:1px solid transparent;
  border-radius:10px;
  cursor:pointer;
  font:inherit;
}

button.primary{
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  color:#fff;
}

.meta{
  margin:14px 0;
  color:#374151;
}

table{
  width:100%;
  border-collapse:collapse;
  margin-top:10px;
}

th, td{
  border-bottom:1px solid #e5e7eb;
  padding:10px 8px;
  text-align:left;
  vertical-align:top;
}

th{
  position:sticky;
  top:0;
  background:#f9fafb;
  z-index:1;
}

code{
  background:#f3f4f6;
  padding:2px 6px;
  border-radius:6px;
}

.controls{
  display:flex;
  gap:18px;
  align-items:center;
  flex-wrap:wrap;
  margin-top:10px;
}

.controls label{
  color:#374151;
  font-size:0.95rem;
}

input[type="number"],
input[type="text"],
select{
  padding:12px;
  border:1px solid #d1d5db;
  border-radius:10px;
  font:inherit;
  color:inherit;
  background:#fff;
}

input[type="number"]{
  width:110px;
}

select{
  max-width:100%;
}

.hint{
  color:#6b7280;
  font-size:0.9rem;
  margin-top:8px;
}

.narrow-input{
  width:260px;
}

.section-gap{
  margin-top:10px;
}

.status-box{
  padding:12px;
}

.output-box{
  margin-top:10px;
}

#plot{
  width: min(960px, 94%);
  height: 420px;
  background:var(--card);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:10px;
  overflow:hidden;
}

button#paramButton{
  margin-top:18px;
  padding:12px 20px;
  font-size:16px;
  color:#fff;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  border: 1px solid rgba(44,123,229,0.18);
  border-radius:10px;
  cursor:pointer;
  box-shadow:0 10px 24px rgba(15,23,42,0.12), inset 0 1px 0 rgba(255,255,255,0.06);
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s;
  user-select:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:600;
  min-width:160px;
}

button#paramButton:hover{
  transform: translateY(-2px);
  box-shadow:0 16px 36px rgba(15,23,42,0.14);
}
button#paramButton:active{
  transform: translateY(0) scale(0.995);
  box-shadow:0 8px 18px rgba(15,23,42,0.08);
}
button#paramButton:focus{
  outline: 3px solid rgba(44,123,229,0.18);
  outline-offset: 2px;
}
button#paramButton[disabled]{
  opacity:0.64;
  cursor:not-allowed;
  transform:none;
  box-shadow:none;
}

@media (max-width:480px){
  body{ padding:16px 16px 120px; }
  #plot{ height:360px; }
  button#paramButton{ width:100%; padding:12px; font-size:15px; }
}

.page-grid{
  display:flex;
  align-items:flex-start;
  gap:18px;
  margin-top:12px;
}
.side-panel{
  flex: 0 0 240px;
}

.site-footer{
  position: fixed;
  left: 0;
  right: 0;
  bottom: 18px;
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 18px;
  pointer-events: none;
}
.site-footer .footer-left,
.site-footer .footer-right{
  pointer-events: auto;
}
.footer-nav{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--card);
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(15,23,42,0.06);
}
.footer-nav.disabled{
  opacity: 0.6;
  cursor: default;
  pointer-events: none;
}

@media (max-width:520px){
  .site-footer{ padding: 6px 12px; bottom:12px; }
  .footer-nav{ padding: 8px 10px; }
}


mjx-container[display="true"] {
  display: block;
  text-align: center;
  margin: 0.75em 0;
}

mjx-container {
  background: transparent !important;
}

.mathjax-hidden,
.MathJax_Preview,
script[type^="math/tex"] {
  display: none !important;
  visibility: hidden !important;
}

mjx-assistive-mml,
mjx-container + script {
  display: none !important;
}

/* Word2Vec page */
.w2v-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 12px;
}
.w2v-wrap { width: 100%; }
.w2v-hero {
  display: block;
  margin-bottom: 18px;
}
.w2v-intro {
  max-width: none;
}
.w2v-quote {
  margin: 18px 0 0;
  padding: 20px 22px;
  border: 1px solid #dbe4f0;
  border-left: 6px solid var(--accent-2);
  border-radius: 14px;
  background: linear-gradient(180deg, #f8fbff 0%, #fdfefe 100%);
  box-shadow: 0 10px 28px rgba(15,23,42,0.05);
  color: #334155;
}
.w2v-quote-title {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.w2v-quote p {
  margin: 0;
  line-height: 1.75;
}
.w2v-diagram-wrap {
  display: flex;
  justify-content: center;
  margin: 18px 0 22px;
}
.w2v-diagram {
  width: min(80%, 640px);
  max-width: 100%;
  height: auto;
  display: block;
}
.w2v-status {
  min-width: 160px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(44,123,229,0.08);
  border: 1px solid rgba(44,123,229,0.16);
  color: var(--accent-2);
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.3;
  white-space: nowrap;
}
.w2v-card {
  background: var(--card);
  border-radius: 14px;
  border: 1px solid rgba(15,23,42,0.06);
  box-shadow: var(--shadow);
  padding: 18px;
}
.w2v-plot-card { margin-bottom: 18px; }
.w2v-form-grid {
  display: grid;
  gap: 12px;
  align-items: end;
}
.w2v-toolbar {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 14px;
}
.w2v-cosine-form {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto minmax(180px, 220px);
  align-items: end;
}
.w2v-cosine-form .w2v-button-row {
  margin-top: 0;
  align-self: end;
}
.w2v-cosine-form .w2v-results {
  min-height: 44px;
  display: flex;
  align-items: center;
}
.w2v-form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: #374151;
  font-size: 0.95rem;
  min-width: 0;
}
.w2v-form-grid input,
.w2v-equation-term input,
.w2v-form-grid select,
.w2v-form-grid textarea {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 11px 12px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font: inherit;
  color: inherit;
  background: #fff;
}
.w2v-form-grid select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--accent-2) 50%),
    linear-gradient(135deg, var(--accent-2) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 3px),
    calc(100% - 12px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 34px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}
.w2v-form-grid input:focus,
.w2v-equation-term input:focus,
.w2v-form-grid select:focus {
  outline: 3px solid rgba(44,123,229,0.18);
  outline-offset: 1px;
  border-color: rgba(44,123,229,0.32);
}
.w2v-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}
.w2v-button {
  padding: 12px 16px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #f8fafc;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  color: var(--text);
}
.w2v-button.primary {
  border-color: rgba(44,123,229,0.18);
  color: #fff;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
}
.w2v-tools {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.w2v-tool-card {
  display: grid;
  grid-template-columns: minmax(340px, 1.35fr) minmax(240px, 0.85fr);
  gap: 18px;
  align-items: start;
}
.w2v-tool-card-cosine {
  grid-template-columns: 1fr;
}
.w2v-tool-main {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.w2v-tool-heading {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.w2v-tool-heading h3 {
  margin: 0;
}
.w2v-tool-panel,
.w2v-tool-result-panel {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 14px;
}
.w2v-tool-result-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
}
.w2v-result-label {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #64748b;
}
.w2v-results {
  color: #374151;
  font-size: 0.95rem;
  line-height: 1.5;
  background: #fff;
  border: 1px solid #dbe4f0;
  border-radius: 12px;
  padding: 12px;
  min-height: 64px;
}
.w2v-card h3 {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-size: 1.2rem;
}
.w2v-result-summary {
  margin: 0 0 10px;
  color: #0f172a;
  font-weight: 600;
}
.w2v-neighbours {
  margin: 0;
  padding-left: 20px;
}
.w2v-neighbours li + li {
  margin-top: 6px;
}
.w2v-neighbour-score {
  color: #64748b;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  margin-left: 8px;
}
.w2v-inline-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #f3f4f6;
  padding: 1px 6px;
  border-radius: 6px;
}
.w2v-subtle {
  margin: 0 0 10px;
  color: #6b7280;
  font-size: 0.95rem;
}
.w2v-inline-equation {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  flex-wrap: nowrap;
  min-width: 0;
}
.w2v-equation-term {
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.w2v-equation-term span {
  color: #475569;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
}
.w2v-equation-term input {
  text-align: center;
}
.w2v-operator {
  flex: 0 0 32px;
  align-self: flex-end;
  text-align: center;
  font-size: 1.2rem;
  color: var(--accent-2);
  font-weight: 700;
  line-height: 44px;
}
#plot {
  width: 100%;
  min-height: 480px;
}

@media (max-width:900px){
  .w2v-header {
    flex-direction: column;
    align-items: stretch;
  }
  .w2v-toolbar {
    grid-template-columns: 1fr 1fr;
  }
  .w2v-tools {
    gap: 18px;
  }
  .w2v-tool-card {
    grid-template-columns: 1fr;
  }
  .w2v-cosine-form {
    grid-template-columns: 1fr;
  }
  .w2v-inline-equation {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .w2v-operator {
    flex: 0 0 auto;
    align-self: center;
    line-height: 1;
  }
}

@media (max-width:640px){
  .w2v-toolbar {
    grid-template-columns: 1fr;
  }
}