* { margin: 0; padding: 0; box-sizing: border-box; }
@page { size: 20in 10in; margin: 0.2in; }

body {
  font-family: 'DM Sans', sans-serif;
  color: #2d2a26;
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Controls row */
.controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.pane-title {
  font-family: 'DM Serif Display', serif;
  font-size: 28px;
  font-weight: 400;
  letter-spacing: 0.3px;
  color: #2d2a26;
  margin-bottom: 6px;
  text-align: center;
}

.pane-subtitle {
  font-size: 13px;
  color: #8a8378;
  letter-spacing: 0.3px;
  margin-bottom: 24px;
  text-align: center;
  max-width: 680px;
  line-height: 1.5;
}

.tab-bar {
  display: flex;
  gap: 0;
  border: 1.5px solid #d5cfc5;
  border-radius: 6px;
  overflow: hidden;
}

.tab-link {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: #8a8378;
  text-decoration: none;
  padding: 8px 18px;
  border-right: 1px solid #d5cfc5;
  transition: color 0.15s, background 0.15s;
}

.tab-link:last-child { border-right: none; }
.tab-link:hover { color: #2d2a26; background: #f5f2ed; }
.tab-link.active { color: #2d2a26; background: #f0ece5; font-weight: 700; }
.tab-short { display: none; }

.nav-link {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: #8a8378;
  text-decoration: none;
  padding: 8px 14px;
  border: 1.5px solid #d5cfc5;
  border-radius: 6px;
  transition: color 0.15s, border-color 0.15s;
}

.nav-link:hover { color: #2d2a26; border-color: #2d2a26; }


/* Grid view */
#grid-view { width: 100%; max-width: 100%; display: flex; flex-direction: column; align-items: center; }
#detail-view { display: none; width: 100%; max-width: 800px; }

.table-wrapper { overflow-x: auto; max-width: 100%; }
table { border-collapse: separate; border-spacing: 0; min-width: 1000px; }
.axis-label-col { width: 110px; min-width: 110px; }
.corner-cell { position: relative; }

th.col-header {
  padding: 14px 8px 16px; text-align: center;
  vertical-align: bottom; border-bottom: 2px solid #d5cfc5; min-width: 128px;
}
th.col-header .col-name {
  font-size: 11px; font-weight: 700; letter-spacing: 1.2px;
  text-transform: uppercase; color: #2d2a26; display: block; margin-bottom: 3px;
}
th.col-header .col-desc {
  font-size: 9px; font-weight: 400; color: #9a9285;
  letter-spacing: 0.2px; display: block; line-height: 1.3;
}

th.row-header {
  padding: 12px 16px 12px 8px; text-align: right; vertical-align: middle;
  border-right: 2px solid #d5cfc5; width: 110px; min-width: 110px;
}
th.row-header .row-name {
  font-size: 11px; font-weight: 700; letter-spacing: 1.2px;
  text-transform: uppercase; color: #2d2a26; display: block;
}
th.row-header .row-desc {
  font-size: 9px; font-weight: 400; color: #9a9285; display: block; margin-top: 2px;
}

td {
  padding: 6px; vertical-align: middle; text-align: center;
  border-bottom: 1px solid #e6e1d8; border-right: 1px solid #e6e1d8; height: 72px;
}
td .cell-content {
  display: inline-block; padding: 8px 12px; border-radius: 6px;
  font-size: 11px; font-weight: 300; line-height: 1.35; max-width: 140px;
}

td.clickable { cursor: pointer; }
td.clickable:hover .cell-content {
  background: #f5f2ed;
  transition: background 0.15s;
}

tr.methods-row td {
  border-top: 2px solid #c8c2b6; border-bottom: none;
  padding: 12px 6px 16px; vertical-align: top; height: auto;
}
tr.methods-row th.row-header {
  vertical-align: top; padding-top: 16px; border-top: 2px solid #c8c2b6;
}
tr.methods-row .cell-content {
  background: none !important; box-shadow: none;
  padding: 4px 4px; font-size: 10px; font-weight: 400;
  line-height: 1.55; max-width: 140px; text-align: left;
}
tr.methods-row .method-tag {
  display: inline-block; font-size: 9.5px; font-weight: 400;
  padding: 2px 7px; border-radius: 3px; margin: 2px 1px;
  letter-spacing: 0.1px; color: #555;
}
tr.methods-row .method-tag.bold { font-size: 10px; font-weight: 700; color: black; }
tr.methods-row td.clickable { cursor: pointer; }
tr.methods-row td.clickable:hover .cell-content { background: #f5f2ed !important; }
tr:last-child td { border-bottom: none; }
td .cell-empty { color: #ccc; font-size: 13px; }

/* Detail page */
.detail-back {
  display: inline-block;
  font-size: 13px;
  color: #8a8378;
  text-decoration: none;
  margin-bottom: 24px;
  transition: color 0.15s;
}
.detail-back:hover { color: #2d2a26; }

.detail-breadcrumb {
  font-size: 12px;
  color: #9a9285;
  letter-spacing: 0.3px;
  margin-bottom: 8px;
}
.detail-breadcrumb a {
  color: #9a9285;
  text-decoration: none;
}
.detail-breadcrumb a:hover { color: #2d2a26; }

.detail-title {
  font-family: 'DM Serif Display', serif;
  font-size: 32px;
  font-weight: 400;
  color: #2d2a26;
  margin-bottom: 24px;
  line-height: 1.3;
}

.detail-body {
  font-size: 15px;
  line-height: 1.7;
  color: #3d3a36;
}

.detail-body h2 {
  font-family: 'DM Serif Display', serif;
  font-size: 22px;
  font-weight: 400;
  color: #2d2a26;
  margin-top: 40px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #e6e1d8;
}

.detail-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: #2d2a26;
  margin-top: 28px;
  margin-bottom: 8px;
}

.detail-body p {
  margin-bottom: 12px;
}

.detail-body ul, .detail-body ol {
  margin-bottom: 12px;
  padding-left: 24px;
}

.detail-body li {
  margin-bottom: 4px;
}

.detail-body strong {
  font-weight: 700;
  color: #2d2a26;
}

.detail-body em {
  font-style: italic;
}

.detail-body a {
  color: #6b5e4f;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.detail-body a:hover {
  color: #2d2a26;
}

.detail-placeholder {
  font-size: 14px;
  color: #b5b0a8;
  font-style: italic;
  padding: 24px;
  border: 1px dashed #d5cfc5;
  border-radius: 8px;
  text-align: center;
  margin-top: 16px;
}

.detail-placeholder a {
  color: #8a8378;
  text-decoration: underline;
}

.people-section {
  margin-top: 32px;
}

.people-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.person-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid #e6e1d8;
  border-radius: 8px;
  font-size: 13px;
}

.person-card .person-name {
  font-weight: 700;
  color: #2d2a26;
}

.person-card .person-role {
  color: #9a9285;
  font-size: 12px;
}

.person-card a {
  color: #6b5e4f;
  text-decoration: none;
}
.person-card a:hover { text-decoration: underline; }

/* Problem sets page */
.ps-page-title {
  font-family: 'DM Serif Display', serif;
  font-size: 32px;
  font-weight: 400;
  color: #2d2a26;
  margin-bottom: 8px;
}

.ps-page-subtitle {
  font-size: 14px;
  color: #8a8378;
  margin-bottom: 32px;
  line-height: 1.5;
  font-style: italic;
}

.ps-group-title {
  font-family: 'DM Serif Display', serif;
  font-size: 22px;
  font-weight: 400;
  color: #2d2a26;
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #e6e1d8;
}

.ps-entry {
  margin-bottom: 32px;
  padding: 20px 24px;
  border: 1px solid #e6e1d8;
  border-radius: 8px;
  background: #fdfcfb;
}

.ps-entry-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.ps-entry-title {
  font-size: 16px;
  font-weight: 700;
  color: #2d2a26;
}

.ps-entry-cell {
  font-size: 12px;
  color: #9a9285;
  padding: 2px 8px;
  border: 1px solid #e0dbd3;
  border-radius: 4px;
}

.ps-entry-cell a {
  color: inherit;
  text-decoration: none;
}
.ps-entry-cell a:hover { color: #2d2a26; }

.ps-entry-body {
  font-size: 14px;
  line-height: 1.65;
  color: #3d3a36;
}

.ps-entry-body p { margin-bottom: 10px; }
.ps-entry-body ul, .ps-entry-body ol { margin-bottom: 10px; padding-left: 20px; }
.ps-entry-body li { margin-bottom: 3px; }
.ps-entry-body strong { font-weight: 700; color: #2d2a26; }

.ps-notes {
  margin-top: 48px;
  padding: 20px 24px;
  border-left: 3px solid #d5cfc5;
  background: #faf9f7;
  font-size: 14px;
  line-height: 1.6;
  color: #6b5e4f;
}

.ps-notes h3 {
  font-size: 15px;
  font-weight: 700;
  color: #2d2a26;
  margin-bottom: 8px;
}

.ps-notes li {
  margin-bottom: 4px;
}

.ps-entry-number {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: #9a9285;
  min-width: 28px;
}

/* Problem set indicator — green triangle in top-right corner */
td.has-ps {
  position: relative;
}
td.has-ps::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  border-style: solid;
  border-width: 0 12px 12px 0;
  border-color: transparent #6aaa64 transparent transparent;
}

/* Methods embed in cell detail view */
.methods-embed {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid #e6e1d8;
}

.methods-embed summary {
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: #8a8378;
  cursor: pointer;
  padding: 8px 0;
}

.methods-embed summary:hover {
  color: #2d2a26;
}

.methods-embed .detail-body {
  margin-top: 12px;
}

/* ── Mobile breakpoints ─────────────────────────────────────────── */

/* Sticky row headers for horizontal scroll */
th.row-header {
  position: sticky;
  left: 0;
  z-index: 1;
  background: #fff;
}
tr.methods-row th.row-header {
  background: #fff;
}

/* Scroll hint on table wrapper */
.table-wrapper {
  position: relative;
}
.table-wrapper::after {
  content: '';
  position: sticky;
  right: 0;
  top: 0;
  bottom: 0;
  width: 24px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.8));
  pointer-events: none;
  display: block;
  position: absolute;
  height: 100%;
}

@media (max-width: 768px) {
  body {
    padding: 16px 8px;
  }

  .controls {
    gap: 6px;
    flex-direction: column;
    align-items: stretch;
  }

  .tab-bar {
    flex-wrap: nowrap;
    justify-content: stretch;
  }

  .tab-link {
    font-size: 12px;
    padding: 8px 14px;
    white-space: nowrap;
    text-align: center;
  }
  .tab-full { display: none; }
  .tab-short { display: inline; }

  .nav-link {
    font-size: 11px;
    padding: 6px 10px;
    text-align: center;
  }

  .pane-title {
    font-size: 18px;
    margin-bottom: 2px;
  }

  .pane-subtitle {
    font-size: 11px;
    margin-bottom: 12px;
    max-width: 100%;
  }

  table { min-width: 600px; }
  th.col-header { min-width: 80px; padding: 8px 4px 10px; }
  th.col-header .col-name { font-size: 9px; letter-spacing: 0.8px; }
  th.col-header .col-desc { font-size: 8px; }

  .axis-label-col,
  th.row-header {
    width: 36px !important;
    min-width: 36px !important;
    padding: 4px 4px 4px 2px;
  }
  th.row-header .row-name {
    font-size: 7px;
    letter-spacing: 0.3px;
  }
  th.row-header .row-desc {
    display: none;
  }

  td { height: 48px; padding: 3px; }
  td .cell-content {
    font-size: 9px;
    padding: 3px 4px;
    max-width: 90px;
  }

  tr.methods-row .cell-content {
    max-width: 90px;
    font-size: 8px;
  }
  tr.methods-row .method-tag {
    font-size: 8px;
    padding: 1px 3px;
  }

  td.has-ps::after { border-width: 0 7px 7px 0; }

  /* Detail page mobile */
  .detail-title { font-size: 24px; }
  .detail-body { font-size: 14px; }
  .detail-body h2 { font-size: 18px; }

  /* Problem sets mobile */
  .ps-page-title { font-size: 24px; }
  .ps-entry { padding: 14px 16px; }
  .ps-entry-header { flex-wrap: wrap; gap: 6px; }
  .ps-entry-title { font-size: 14px; }
}

/* Site footer */
.site-footer {
  margin-top: 48px;
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: #999;
}

.site-footer a {
  color: #999;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.site-footer a:hover {
  color: #666;
}