/* Harvard T.H. Chan School of Public Health / APR Editorial Style
   Orthogonal Payment Model Explorer for America's Essential Hospitals
   Zero AI cliches: No neon gradients, no 16px bubble cards, strict typographic discipline. */

:root {
  --harvard-crimson: #a51c30;
  --harvard-crimson-dark: #7a0019;
  --harvard-crimson-tint: #fbebee;
  --harvard-gold: #c49a45;
  --harvard-slate: #1e2229;
  --harvard-slate-light: #2d3139;
  
  --ink: #141414;
  --ink-secondary: #4a5568;
  --ink-muted: #718096;
  --ink-faint: #a0aec0;
  
  --paper-ground: #fafafa;
  --paper-card: #ffffff;
  --paper-sunk: #f4f3f0;
  --paper-rule: #dcd8d0;
  --paper-rule-strong: #b8b3a9;
  
  --positive: #2d6a4f;
  --positive-bg: #eaf5ee;
  --negative: #be3a34;
  --negative-bg: #fbebee;
  
  --font-serif: "Iowan Old Style", "Baskerville", "Georgia", "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;
  
  --radius: 2px;
  --max-width: 1200px;
}

* { box-sizing: border-box; }
html { font-size: 16px; background-color: var(--paper-ground); color: var(--ink); }
body {
  margin: 0;
  font-family: var(--font-sans);
  line-height: 1.6;
  background-color: var(--paper-ground);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

/* Institutional Masthead */
.masthead {
  border-top: 5px solid var(--harvard-crimson);
  background: var(--paper-card);
  border-bottom: 1px solid var(--paper-rule);
  padding: 1.25rem 2rem 1rem;
}
.masthead-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
}
.institution-title {
  display: flex;
  flex-direction: column;
}
.institution-eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--harvard-crimson);
  margin-bottom: 0.25rem;
}
.institution-name {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--harvard-slate);
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 0;
}
.institution-sub {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  margin-top: 0.35rem;
}
.masthead-meta {
  text-align: right;
  font-size: 0.82rem;
  color: var(--ink-muted);
  line-height: 1.45;
  border-left: 1px solid var(--paper-rule);
  padding-left: 1.5rem;
}
.meta-chip {
  display: inline-block;
  background: var(--paper-sunk);
  padding: 0.2rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border-radius: var(--radius);
  margin-top: 0.35rem;
  color: var(--harvard-slate);
  border: 1px solid var(--paper-rule);
}

/* Navigation bar */
.nav-bar {
  background: var(--harvard-slate);
  color: #fff;
  border-bottom: 1px solid #111;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
}
.nav-item {
  color: #d1d5db;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.6rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav-item:hover, .nav-item.active {
  color: #ffffff;
  border-bottom-color: var(--harvard-crimson);
}
.user-status {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.user-status a {
  color: #fca5a5;
  text-decoration: underline;
}

/* Page Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
}

/* Executive Abstract & Brief */
.brief-section {
  background: var(--paper-card);
  border: 1px solid var(--paper-rule);
  border-left: 4px solid var(--harvard-crimson);
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
}
.brief-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}
.brief-text h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-top: 0;
  color: var(--harvard-slate);
}
.brief-text p {
  color: var(--ink-secondary);
  font-size: 0.98rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}
.study-box {
  background: var(--paper-sunk);
  border: 1px solid var(--paper-rule);
  padding: 1rem 1.25rem;
  font-size: 0.85rem;
}
.study-box h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.5rem;
  color: var(--harvard-crimson);
  border-bottom: 1px solid var(--paper-rule);
  padding-bottom: 0.35rem;
}
.study-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.study-list li {
  margin-bottom: 0.4rem;
  display: flex;
  justify-content: space-between;
}
.study-list li .label {
  color: var(--ink-muted);
}
.study-list li .val {
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

/* Section Titles */
.section-header {
  border-bottom: 2px solid var(--paper-rule-strong);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.section-header h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin: 0;
  color: var(--harvard-slate);
}
.section-header .section-tag {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  font-weight: 600;
}

/* Orthogonal Explorer Workspace */
.explorer-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

/* Control Panel */
.panel-controls {
  background: var(--paper-card);
  border: 1px solid var(--paper-rule);
  padding: 1.25rem;
}
.control-header {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin: 0 0 0.75rem;
  color: var(--harvard-slate);
  border-bottom: 1px solid var(--paper-rule);
  padding-bottom: 0.5rem;
}

/* Presets & Archetypes */
.archetype-presets {
  margin-bottom: 1.25rem;
}
.preset-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  font-weight: 700;
  margin-bottom: 0.4rem;
  display: block;
}
.preset-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.btn-preset {
  background: var(--paper-sunk);
  border: 1px solid var(--paper-rule);
  padding: 0.45rem 0.65rem;
  text-align: left;
  font-size: 0.82rem;
  font-family: var(--font-sans);
  cursor: pointer;
  border-radius: var(--radius);
  color: var(--ink);
  transition: all 0.15s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.btn-preset:hover {
  background: #eae8e3;
  border-color: var(--paper-rule-strong);
}
.btn-preset.active {
  background: var(--harvard-crimson-tint);
  border-color: var(--harvard-crimson);
  font-weight: 600;
  color: var(--harvard-crimson-dark);
}

/* 4 Orthogonal Axis Sliders / Selectors */
.dimension-group {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--paper-rule);
}
.axis-card {
  margin-bottom: 1.25rem;
}
.axis-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.25rem;
}
.axis-num {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--harvard-crimson);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.axis-name {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--harvard-slate);
}
.axis-val-badge {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--harvard-crimson-dark);
  font-weight: 600;
  background: var(--harvard-crimson-tint);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius);
}
.axis-desc {
  font-size: 0.76rem;
  color: var(--ink-secondary);
  line-height: 1.35;
  margin: 0.2rem 0 0.5rem;
}
.axis-slider {
  width: 100%;
  accent-color: var(--harvard-crimson);
  margin: 0.35rem 0;
  cursor: pointer;
}
.axis-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  color: var(--ink-muted);
  text-transform: uppercase;
}

/* Shock Scenarios */
.shock-section {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--paper-rule);
}
.shock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}
.btn-shock {
  background: var(--paper-sunk);
  border: 1px solid var(--paper-rule);
  padding: 0.4rem;
  font-size: 0.75rem;
  cursor: pointer;
  border-radius: var(--radius);
  text-align: center;
  color: var(--ink-secondary);
}
.btn-shock.active {
  background: var(--harvard-slate);
  color: #fff;
  border-color: var(--harvard-slate);
  font-weight: 600;
}

/* Visualization Display Area */
.panel-vis {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 2D Phase Space Projection */
.vis-card {
  background: var(--paper-card);
  border: 1px solid var(--paper-rule);
  padding: 1.5rem;
}
.vis-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--paper-rule);
  padding-bottom: 0.5rem;
}
.vis-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--harvard-slate);
  margin: 0;
}
.vis-legend {
  font-size: 0.75rem;
  color: var(--ink-muted);
  display: flex;
  gap: 1rem;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

/* Canvas Container */
.phase-canvas-container {
  position: relative;
  width: 100%;
  height: 380px;
  background: #fafaf8;
  border: 1px solid var(--paper-rule);
}
#phaseCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Impact Metrics Dashboard */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.metric-box {
  background: var(--paper-sunk);
  border: 1px solid var(--paper-rule);
  padding: 0.85rem;
  text-align: left;
}
.metric-lbl {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.metric-val {
  font-size: 1.4rem;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--harvard-slate);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.metric-sub {
  font-size: 0.74rem;
  color: var(--ink-secondary);
  margin-top: 0.2rem;
}
.metric-box.positive .metric-val { color: var(--positive); }
.metric-box.negative .metric-val { color: var(--negative); }

/* Model Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 1rem;
}
.comparison-table th, .comparison-table td {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--paper-rule);
  text-align: left;
}
.comparison-table th {
  background: var(--paper-sunk);
  font-weight: 700;
  color: var(--harvard-slate);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.comparison-table tr.active-row {
  background: var(--harvard-crimson-tint);
  font-weight: 600;
}

/* APRIL Agent & Subfolder Deployment Interface */
.april-section {
  background: var(--paper-card);
  border: 1px solid var(--paper-rule);
  border-top: 3px solid var(--harvard-crimson);
  padding: 1.75rem 2rem;
  margin-bottom: 2.5rem;
}
.april-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.april-intro h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--harvard-slate);
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.april-badge {
  background: var(--harvard-crimson);
  color: #fff;
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.april-instruction {
  background: var(--paper-sunk);
  border: 1px solid var(--paper-rule);
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin-bottom: 1rem;
  border-left: 3px solid var(--harvard-gold);
}
.april-chat-window {
  border: 1px solid var(--paper-rule);
  height: 220px;
  overflow-y: auto;
  padding: 0.85rem;
  background: #fafaf8;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}
.chat-msg {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  line-height: 1.45;
  max-width: 90%;
}
.chat-msg.april {
  background: #ffffff;
  border: 1px solid var(--paper-rule);
  border-left: 3px solid var(--harvard-crimson);
  align-self: flex-start;
}
.chat-msg.user {
  background: var(--harvard-slate);
  color: #fff;
  align-self: flex-end;
}
.chat-input-row {
  display: flex;
  gap: 0.5rem;
}
.chat-input {
  flex: 1;
  border: 1px solid var(--paper-rule-strong);
  padding: 0.45rem 0.65rem;
  font-size: 0.88rem;
  border-radius: var(--radius);
  font-family: inherit;
}
.chat-btn {
  background: var(--harvard-crimson);
  color: #fff;
  border: 0;
  padding: 0.45rem 1rem;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: var(--radius);
}
.chat-btn:hover { background: var(--harvard-crimson-dark); }

/* Subfolder Deployment Card */
.deploy-box {
  background: var(--paper-sunk);
  border: 1px solid var(--paper-rule);
  padding: 1.25rem;
}
.deploy-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.4rem;
  color: var(--harvard-slate);
}
.deploy-desc {
  font-size: 0.82rem;
  color: var(--ink-secondary);
  margin-bottom: 1rem;
}
.form-field {
  margin-bottom: 0.85rem;
}
.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-secondary);
  margin-bottom: 0.25rem;
}
.form-input-group {
  display: flex;
  align-items: center;
}
.form-prefix {
  background: #e2e8f0;
  padding: 0.45rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border: 1px solid var(--paper-rule-strong);
  border-right: 0;
  color: var(--ink-muted);
}
.form-input {
  flex: 1;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--paper-rule-strong);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.avail-indicator {
  font-size: 0.75rem;
  margin-top: 0.25rem;
  font-weight: 600;
}
.avail-indicator.ok { color: var(--positive); }
.avail-indicator.taken { color: var(--negative); }

.btn-deploy {
  background: var(--harvard-slate);
  color: #fff;
  border: 0;
  width: 100%;
  padding: 0.65rem;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background 0.15s;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
}
.btn-deploy:hover { background: #000; }
.btn-deploy:disabled { opacity: 0.5; cursor: not-allowed; }

.deploy-result {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: #fff;
  border: 1px solid var(--paper-rule);
  font-size: 0.82rem;
  display: none;
}
.deploy-result.active { display: block; }
.deploy-result a {
  color: var(--harvard-crimson);
  font-weight: 700;
  word-break: break-all;
}

/* Policy References & Footer */
.policy-deepdive {
  background: var(--paper-card);
  border: 1px solid var(--paper-rule);
  padding: 2rem;
  margin-bottom: 2.5rem;
}
.policy-deepdive h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--harvard-slate);
  margin-top: 1.5rem;
  border-bottom: 1px solid var(--paper-rule);
  padding-bottom: 0.4rem;
}
.policy-deepdive h3:first-child { margin-top: 0; }
.policy-deepdive p {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.65;
}
.citation-list {
  font-size: 0.82rem;
  color: var(--ink-muted);
  line-height: 1.5;
  border-top: 1px solid var(--paper-rule);
  padding-top: 1rem;
  margin-top: 1.5rem;
}

/* Institutional Footer */
.footer {
  background: var(--paper-sunk);
  border-top: 1px solid var(--paper-rule);
  padding: 2rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links a {
  color: var(--harvard-crimson);
  text-decoration: none;
  margin-left: 1.25rem;
}
.footer-links a:hover { text-decoration: underline; }

@media (max-width: 960px) {
  .explorer-grid, .april-layout, .brief-grid { grid-template-columns: 1fr; }
  .metrics-row { grid-template-columns: 1fr 1fr; }
  .masthead-inner { flex-direction: column; }
  .masthead-meta { border-left: 0; padding-left: 0; text-align: left; }
}