:root {
  --bg: #f8f8f6;
  --surface: #ffffff;
  --surface-2: #f5f7fb;
  --line: #d7dbe3;
  --ink: #171b24;
  --muted: #5f6675;
  --accent: #124a8c;
  --accent-2: #0f3f79;
  --danger: #7a1f1f;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

.landing-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.landing-card {
  width: min(900px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  display: grid;
  gap: 12px;
}

.landing-title {
  margin: 0;
  font-size: 1.8rem;
}

.landing-subtitle {
  margin: 0;
  color: var(--muted);
}

.home-topbar,
.home-content,
.site-header-inner,
.home-nav-inner {
  width: min(860px, 100%);
  margin: 0 auto;
}

.home-topbar {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
  grid-template-areas:
    "title copy"
    "nav copy";
  gap: 10px 36px;
  margin-bottom: 24px;
}

.site-header {
  grid-area: title;
}

.site-header-inner {
  display: grid;
  gap: 10px;
  width: 100%;
  justify-items: center;
  text-align: center;
}

.home-title {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  font-size: clamp(2.2rem, 5vw, 3rem);
  line-height: 1;
  letter-spacing: 0.01em;
}

.home-subtitle,
.site-header-copy {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  max-width: 68ch;
  line-height: 1.45;
}

.site-header-copy {
  grid-area: copy;
  display: grid;
  gap: 6px;
  width: min(100%, 82ch);
  align-content: start;
}

.site-header-copy p {
  margin: 0;
}

.home-nav {
  grid-area: nav;
}

.home-nav-inner {
  padding-bottom: 12px;
  display: flex;
  justify-content: center;
}

.home-selector {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.home-tab {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 2px 0;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

.home-tab:hover {
  color: var(--ink);
}

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

.home-tab.active:hover {
  color: var(--accent);
}

.home-panel {
  padding: 0;
}

.project-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.project-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
  padding: 12px;
  display: grid;
  gap: 8px;
}

.project-name {
  margin: 0;
  font-size: 1.1rem;
}

.project-summary {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.project-link {
  display: inline-block;
  width: fit-content;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 7px 10px;
  font-size: 0.9rem;
}

.project-link:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
}

.project-link.secondary {
  background: transparent;
  color: var(--accent);
}

.project-link.secondary:hover {
  background: #eaf1ff;
  border-color: var(--accent);
}

.paper-app-shell {
  min-height: 100vh;
  padding: 52px 20px 72px;
}

.paper-app-topbar {
  width: min(860px, 100%);
  margin: 0 auto;
}

.paper-app-nav {
  width: 100%;
}

.app-shell {
  width: min(1320px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(224px, 270px) minmax(0, 1fr) minmax(224px, 270px);
  gap: 20px;
  padding: 0;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 14px;
  align-self: start;
  max-height: calc(100vh - 28px);
  overflow: auto;
  display: grid;
  gap: 12px;
}

.sidebar-left {
  border-right: 1px solid var(--line);
  padding-right: 14px;
}

.sidebar-right {
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

.paper-main {
  min-width: 0;
}

.control-column-box {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
}

.control-column-box .panel {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
}

.control-column-box .panel + .panel {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.app-title {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: 0.01em;
}

.app-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.4;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  display: grid;
  gap: 10px;
}

.panel-title {
  margin: 0;
  font-size: 1rem;
}

.run-actions {
  display: flex;
  gap: 8px;
}

.split-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.action,
.preset-btn {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-2);
  color: var(--ink);
  padding: 7px 10px;
  font-size: 0.9rem;
  cursor: pointer;
}

.action.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.action.primary:hover {
  background: var(--accent-2);
}

.action:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.status-line {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.control {
  display: grid;
  gap: 6px;
}

.control-label {
  font-size: 0.88rem;
  color: var(--muted);
}

input[type="range"],
input[type="number"],
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 8px;
  background: white;
  color: var(--ink);
}

.paper {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 18px 20px;
  display: grid;
  gap: 22px;
}

.paper-app-shell .paper-main {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
}

.paper-section {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.paper-section + .paper-section {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.paper-section-title {
  margin: 0;
  font-size: 1.3rem;
  padding-bottom: 0;
}

.paper-doc {
  padding: 0;
  display: grid;
  gap: 12px;
  font-family: "STIX Two Text", "Iowan Old Style", "Georgia", serif;
  line-height: 1.6;
  font-size: 1.03rem;
}

.paper-doc .katex {
  font-size: 1.05em;
}

.paper-doc h1,
.paper-doc h2,
.paper-doc h3 {
  font-family: "STIX Two Text", "Iowan Old Style", "Georgia", serif;
  letter-spacing: 0.01em;
  margin: 0.2rem 0 0.35rem;
  line-height: 1.25;
}

.paper-doc h1 {
  font-size: 1.85rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.42rem;
}

.paper-doc h2 {
  font-size: 1.28rem;
}

.paper-doc p {
  margin: 0.35rem 0 0.72rem;
}

.paper-doc ul {
  margin: 0.2rem 0 0.8rem 1.2rem;
}

.paper-doc li {
  margin: 0.22rem 0;
}

.paper-doc .katex-display {
  margin: 0.65rem 0 0.95rem;
  overflow-x: auto;
  overflow-y: hidden;
}

.paper-math-fallback {
  margin: 0;
  font-family: "STIX Two Text", "Iowan Old Style", "Georgia", serif;
  font-size: 1.02rem;
  color: var(--ink);
}

.section-figures {
  display: grid;
  gap: 16px;
}

.figure-card {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 6px 0 10px;
  cursor: pointer;
  transition: opacity 140ms ease;
}

.figure-card-focused {
  opacity: 1;
}

.figure-card-passive {
  opacity: 0.86;
}

.figure-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.figure-title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.figure-focus-chip {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.figure-card-focused .figure-focus-chip {
  color: var(--accent-2);
  font-weight: 500;
}

.plot-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.plot-control {
  display: grid;
  gap: 5px;
  min-width: 170px;
}

.plot-control-label {
  font-size: 0.8rem;
  color: var(--muted);
}

.plot-control-value {
  font-size: 0.8rem;
  color: var(--muted);
}

.plot-canvas {
  width: 100%;
  min-height: 220px;
  background: transparent;
  border: 0;
  border-radius: 0;
}

canvas.plot-canvas {
  display: block;
  height: var(--plot-height, 280px);
  image-rendering: auto;
}

.split-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.split-table th,
.split-table td {
  border: 1px solid var(--line);
  padding: 6px 8px;
  text-align: right;
}

.split-table th:first-child,
.split-table td:first-child {
  text-align: left;
}

@media (max-width: 1240px) {
  .app-shell {
    grid-template-columns: minmax(224px, 260px) minmax(0, 1fr);
  }

  .sidebar-right {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 12px;
    position: static;
    max-height: none;
    overflow: visible;
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 12px;
  }
}

@media (max-width: 1120px) {
  .paper-app-shell {
    padding-top: 34px;
  }

  .home-topbar {
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "copy"
      "nav";
    gap: 12px;
  }

  .site-header-copy {
    width: 100%;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
  }

  .sidebar-left,
  .sidebar-right {
    border: 0;
    padding: 0;
  }

  .sidebar-right {
    grid-template-columns: 1fr;
  }
}