:root{
  --parchment:#f3eddc;
  --paper:#fbf8ee;
  --oak:#9b6a3d;
  --oak-light:#c99b67;
  --walnut:#3c281c;
  --walnut-2:#5a3b26;
  --forest:#789173;
  --forest-light:#a9bca0;
  --forest-dark:#385043;
  --brass:#ad9562;
  --ink:#26241f;
  --muted:#6e685d;
  --line:#d9ccb2;
  --shadow:0 18px 50px rgba(55,38,23,.14);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:
    linear-gradient(rgba(255,255,255,.12),rgba(255,255,255,.12)),
    var(--parchment);
  font-family:Georgia,"Times New Roman",serif;
  line-height:1.58;
}

button,input{font:inherit}

.masthead{
  color:#f8f1df;
  background:
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px) 0 0/18px 100%,
    var(--walnut);
  border-bottom:8px solid var(--forest-dark);
  box-shadow:0 8px 24px rgba(35,24,16,.2);
}

.brand-wrap{
  max-width:1180px;
  margin:0 auto;
  padding:34px 24px 30px;
  display:flex;
  align-items:center;
  gap:20px;
}

.book-mark{
  width:68px;
  height:78px;
  display:grid;
  place-items:center;
  flex:0 0 auto;
  font-size:42px;
  color:#f6eedc;
  background:var(--forest);
  border:1px solid #b9c9b1;
  border-radius:4px 4px 16px 4px;
  box-shadow:inset 0 0 0 5px rgba(255,255,255,.08), 0 6px 18px rgba(0,0,0,.2);
}

.eyebrow,.kicker{
  margin:0 0 3px;
  font-family:Arial,sans-serif;
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
}

.eyebrow{color:#d3c19a}
.kicker{color:var(--forest-dark)}

h1,h2,h3,h4,p{margin-top:0}
h1{
  margin-bottom:2px;
  font-size:clamp(2.35rem,5vw,4.3rem);
  line-height:1;
  font-weight:500;
  letter-spacing:-.025em;
}
.subtitle{margin:8px 0 0;color:#ded3bc;font-size:1.03rem}

.shell{max-width:1180px;margin:0 auto;padding:28px 24px 52px}

.controls{
  display:flex;
  gap:16px;
  align-items:end;
  justify-content:space-between;
  margin-bottom:22px;
}

.search-wrap{
  display:grid;
  gap:6px;
  flex:1 1 430px;
  font-family:Arial,sans-serif;
  font-size:.78rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--forest-dark);
}

.search-wrap input{
  width:100%;
  padding:13px 14px;
  border:1px solid #bbaa8d;
  border-radius:5px;
  background:#fffdf6;
  color:var(--ink);
  outline:none;
  box-shadow:inset 0 1px 3px rgba(75,48,24,.08);
}

.search-wrap input:focus{
  border-color:var(--forest-dark);
  box-shadow:0 0 0 3px rgba(120,145,115,.2);
}

.filters{display:flex;flex-wrap:wrap;gap:7px;justify-content:flex-end}

.filter-btn{
  border:1px solid #b5a887;
  border-radius:999px;
  background:#eee6d3;
  color:#554b3b;
  padding:8px 11px;
  cursor:pointer;
  font-family:Arial,sans-serif;
  font-size:.75rem;
  font-weight:700;
}
.filter-btn:hover,.filter-btn.active{
  background:var(--forest-dark);
  color:#fff8e8;
  border-color:var(--forest-dark);
}

.workspace{
  display:grid;
  grid-template-columns:minmax(250px,330px) minmax(0,1fr);
  gap:22px;
  align-items:start;
}

.index-panel,.entry-panel{
  border:1px solid #c9b99b;
  box-shadow:var(--shadow);
}

.index-panel{
  background:
    linear-gradient(90deg,rgba(255,255,255,.06),transparent 34%,rgba(55,30,15,.06)),
    var(--oak);
  border-color:#79502e;
  padding:14px;
  border-radius:7px;
}

.panel-heading{
  color:#fff8e8;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:7px 7px 13px;
}
.panel-heading .kicker{color:#e2d2ad}
.panel-heading h2{margin:0;font-size:1.55rem;font-weight:500}
.count-badge{
  font-family:Arial,sans-serif;
  font-size:.72rem;
  background:rgba(54,39,28,.38);
  border:1px solid rgba(255,255,255,.18);
  padding:4px 8px;
  border-radius:999px;
}

.term-list{display:grid;gap:8px}

.term-btn{
  width:100%;
  text-align:left;
  cursor:pointer;
  color:#2d2a23;
  background:#f5efdf;
  border:1px solid #d0bb94;
  border-left:5px solid var(--forest);
  border-radius:4px;
  padding:12px 13px;
  box-shadow:0 3px 8px rgba(70,43,22,.15);
  transition:transform .15s ease,background .15s ease,border-color .15s ease;
}
.term-btn:hover{transform:translateX(3px);background:#fffaf0}
.term-btn.active{
  background:var(--forest-light);
  border-color:var(--forest-dark);
  color:#1f2b23;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.45),0 4px 10px rgba(47,46,33,.15);
}
.term-name{display:block;font-weight:700;font-size:1.02rem}
.term-cat{
  display:block;
  margin-top:2px;
  font-family:Arial,sans-serif;
  color:#706856;
  font-size:.7rem;
  text-transform:uppercase;
  letter-spacing:.08em;
}
.term-btn.active .term-cat{color:#405343}

.entry-panel{
  min-height:600px;
  background:var(--paper);
  border-radius:7px;
  overflow:hidden;
}

.entry-inner{padding:30px clamp(22px,4vw,48px) 46px}

.entry-header{
  margin:-30px clamp(-48px,-4vw,-22px) 28px;
  padding:26px clamp(22px,4vw,48px) 22px;
  background:#e7ecdF;
  border-bottom:1px solid #c5d0be;
}
.entry-header .category{
  color:var(--forest-dark);
  font-family:Arial,sans-serif;
  font-size:.72rem;
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:.13em;
}
.entry-header h2{
  margin:4px 0 4px;
  color:#2f4034;
  font-size:clamp(2rem,4vw,3.25rem);
  line-height:1.06;
  font-weight:500;
}
.entry-header .lede{font-size:1.16rem;max-width:760px;margin:8px 0 0}

.entry-section{margin:0 0 27px}
.entry-section h3{
  margin-bottom:8px;
  padding-bottom:5px;
  border-bottom:1px solid var(--line);
  color:#4a382a;
  font-size:1.24rem;
}
.entry-section p:last-child{margin-bottom:0}

.example{
  padding:12px 15px;
  border-left:4px solid var(--brass);
  background:#f5efdf;
  font-style:italic;
}

.memory{
  padding:17px 18px;
  border:1px solid #9fb197;
  background:#e6ecdf;
  color:#304234;
  border-radius:5px;
  font-size:1.08rem;
}

.flow{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:14px 0;
}
.flow span{
  padding:8px 11px;
  background:#efe4cc;
  border:1px solid #d7c49f;
  border-radius:4px;
}
.flow b{color:var(--forest-dark)}

.compare-grid,.definition-grid,.diagram-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:15px;
}
.compare-card,.definition-card,.diagram-card{
  padding:17px;
  background:#f6f0e2;
  border:1px solid #d9cbb1;
  border-radius:6px;
}
.compare-card h3,.definition-card h3,.diagram-card h3{border:0;margin-bottom:8px}
.compare-card.green{background:#e6ecdf;border-color:#aabca2}

table{
  width:100%;
  border-collapse:collapse;
  margin:14px 0;
  background:#fffaf0;
  font-size:.94rem;
}
th,td{padding:10px 11px;border:1px solid #d8cbb1;vertical-align:top}
th{background:#e7ecdF;text-align:left;color:#33463a}

.wild-map{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:9px;
  margin:16px 0 22px;
}
.wild-core{
  grid-column:1/-1;
  text-align:center;
  background:var(--forest-dark);
  color:white;
  padding:15px;
  border-radius:5px;
  font-size:1.25rem;
}
.wild-branch{
  background:#f1e5cd;
  border:1px solid #d5bd94;
  padding:10px;
  border-radius:4px;
  text-align:center;
}
.wild-branch b{display:block;color:#4d3928}

.sense-list{
  counter-reset:sense;
  display:grid;
  gap:12px;
}
.sense{
  counter-increment:sense;
  padding:15px 16px;
  background:#faf6eb;
  border:1px solid #ded2ba;
  border-left:4px solid var(--forest);
}
.sense h4{margin:0 0 5px;font-size:1.03rem;color:#364b3d}
.sense h4::before{content:counter(sense) ". ";color:#987047}
.sense p{margin-bottom:6px}
.sense small{font-family:Arial,sans-serif;color:#6c665d}

.math{
  font-family:"Times New Roman",serif;
  font-size:1.3rem;
  text-align:center;
  padding:10px;
}
.formula{
  display:inline-block;
  padding:9px 13px;
  margin:4px;
  color:#26382d;
  background:#e2eadc;
  border:1px solid #a9bba2;
  border-radius:4px;
  font-size:1.2rem;
}

svg{width:100%;height:auto;display:block}
.diagram-label{font-family:Arial,sans-serif;font-size:13px;fill:#2d3f34}
.diagram-line{stroke:#3f5948;stroke-width:3;fill:none}
.diagram-accent{stroke:#9c6b3f;stroke-width:3;fill:none}

.language-tree{
  display:grid;
  gap:9px;
  text-align:center;
}
.tree-node{
  padding:10px;
  border:1px solid #cdbd9f;
  background:#f6f0e2;
  border-radius:5px;
}
.tree-node.root{background:var(--forest-dark);color:white;border-color:var(--forest-dark)}
.tree-row{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}

.no-results{
  color:#fff8e8;
  background:rgba(54,39,28,.45);
  border:1px solid rgba(255,255,255,.18);
  padding:14px;
  border-radius:5px;
  text-align:center;
}

.empty-state{
  min-height:600px;
  display:grid;
  align-content:center;
  justify-items:center;
  text-align:center;
  padding:35px;
  color:#5b5549;
}
.empty-state h2{margin-bottom:6px;color:#33463a;font-size:2rem}
.empty-state p:last-child{max-width:420px}
.empty-monogram{
  width:88px;height:88px;display:grid;place-items:center;
  margin-bottom:16px;border:1px solid #aebca5;color:#425849;
  background:#e6ecdf;border-radius:50%;font-size:2.8rem;
}

footer{
  padding:24px;text-align:center;color:#776d5c;
  font-family:Arial,sans-serif;font-size:.76rem;
  border-top:1px solid #d9ccb2;
}

@media (max-width:820px){
  .controls{display:grid;align-items:stretch}
  .filters{justify-content:flex-start}
  .workspace{grid-template-columns:1fr}
  .term-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .entry-panel{min-height:420px}
  .empty-state{min-height:420px}
}

@media (max-width:560px){
  .brand-wrap{align-items:flex-start}
  .book-mark{width:54px;height:64px;font-size:32px}
  .shell{padding:20px 14px 40px}
  .term-list{grid-template-columns:1fr}
  .compare-grid,.definition-grid,.diagram-grid{grid-template-columns:1fr}
  .wild-map{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tree-row{grid-template-columns:1fr}
  .entry-inner{padding:24px 18px 34px}
  .entry-header{margin:-24px -18px 24px;padding:22px 18px 18px}
}


/* Grammar Guide integration */
.grammar-definition{
  padding:14px 16px;
  background:#edf1e8;
  border:1px solid #c2cdbb;
  border-left:5px solid var(--forest);
  border-radius:5px;
}
.grammar-definition h3{border:0;margin-bottom:5px}
.grammar-example-list,.question-list,.evolution-list,.pair-list{display:grid;gap:10px}
.example-note,.grammar-note{color:var(--muted);font-size:.9rem}
.grammar-tokens{
  display:flex;
  flex-wrap:wrap;
  gap:9px;
  align-items:stretch;
}
.grammar-token{
  display:grid;
  gap:4px;
  min-width:90px;
  padding:9px 10px;
  background:#f4ead6;
  border:1px solid #d1bd98;
  border-radius:5px;
}
.grammar-token strong{font-size:1.04rem;color:#3e3024}
.grammar-token small{font-family:Arial,sans-serif;font-size:.7rem;line-height:1.35;color:#665f55}
.grammar-why{
  padding:17px 18px;
  border-left:5px solid var(--forest-dark);
  background:#e6ecdf;
  border-radius:4px;
}
.grammar-why strong{
  display:block;
  margin-bottom:4px;
  color:#314638;
  font-size:1.05rem;
}
.grammar-why p{margin:0}
.grammar-wrong{background:#f3e7df;border-color:#d7b8a7}
.grammar-wrong h3{color:#704536}
.grammar-wrong-text{border-left-color:#9c6249!important;background:#f4e9e2!important}
.grammar-card{position:relative}
.grammar-big{
  width:max-content;
  min-width:44px;
  padding:5px 8px;
  margin-bottom:9px;
  background:var(--forest-dark);
  color:#fff;
  border-radius:4px;
  text-align:center;
  font-family:Arial,sans-serif;
  font-weight:800;
  font-size:.85rem;
}
.grammar-card ul,.compare-card ul{margin:8px 0 0;padding-left:20px}
.grammar-card li,.compare-card li{margin:3px 0}
.grammar-timeline{display:grid;gap:9px}
.timeline-era{
  border:1px solid #d3c5aa;
  border-radius:5px;
  background:#faf5e9;
  overflow:hidden;
}
.timeline-era summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  justify-content:space-between;
  gap:14px;
  padding:12px 14px;
  background:#e8eddf;
  color:#314638;
}
.timeline-era summary::-webkit-details-marker{display:none}
.timeline-era summary span{font-family:Arial,sans-serif;font-size:.8rem;color:#69645a}
.timeline-body{padding:14px 16px}
.timeline-body ul{padding-left:20px}
.tense-track{
  position:relative;
  height:88px;
  margin:18px 12px 8px;
}
.tense-line{
  position:absolute;
  left:0;right:0;top:38px;
  height:3px;
  background:#806346;
}
.tense-point{
  position:absolute;
  top:28px;
  transform:translateX(-50%);
  display:grid;
  justify-items:center;
  gap:8px;
  min-width:70px;
  text-align:center;
}
.tense-point span{
  width:19px;height:19px;border-radius:50%;
  background:var(--forest-dark);
  border:3px solid #edf1e8;
  box-shadow:0 0 0 1px var(--forest-dark);
}
.tense-point b{font-size:.78rem;color:#4b4236}
.table-scroll{overflow-x:auto}
.morph-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:12px 0;
}
.morph-part{
  display:grid;
  justify-items:center;
  padding:8px 11px;
  background:#ede4d1;
  border:1px solid #cdbb98;
  border-radius:5px;
}
.morph-part small{
  margin-top:2px;
  font-family:Arial,sans-serif;
  font-size:.68rem;
  text-transform:uppercase;
  letter-spacing:.07em;
  color:#716856;
}
.morph-plus{color:var(--forest-dark);font-size:1.15rem}
.evolution-chain{
  padding:12px 14px;
  border:1px solid #d8cbb1;
  background:#faf6eb;
  border-radius:5px;
}
.evolution-chain .flow{margin:0 0 5px}
.pair-row{
  display:grid;
  grid-template-columns:minmax(100px,160px) 1fr;
  gap:12px;
  padding:10px 12px;
  border:1px solid #d9cbb1;
  background:#faf6eb;
  border-radius:5px;
}
.pair-row strong{color:#354a3c}
.grammar-check{
  margin-top:34px;
  padding-top:4px;
}
.question-card{
  position:relative;
  padding:15px 16px 14px 48px;
  border:1px solid #d8cbb1;
  background:#faf6eb;
  border-radius:6px;
}
.question-card p{margin-bottom:8px}
.question-number{
  position:absolute;
  left:13px;top:13px;
  width:25px;height:25px;
  display:grid;
  place-items:center;
  margin:0!important;
  border-radius:50%;
  background:var(--forest-dark);
  color:white;
  font-family:Arial,sans-serif;
  font-size:.75rem;
  font-weight:800;
}
.question-sentence{
  padding:9px 11px;
  background:#f1e6d1;
  border-left:4px solid var(--brass);
  font-style:italic;
}
.question-card ol{margin:8px 0 10px;padding-left:25px}
.answer-reveal{
  margin-top:10px;
  border-top:1px solid #dfd2bb;
  padding-top:8px;
}
.answer-reveal summary{
  cursor:pointer;
  color:var(--forest-dark);
  font-family:Arial,sans-serif;
  font-size:.8rem;
  font-weight:800;
}
.answer-reveal[open] summary{margin-bottom:8px}
.answer-reveal p:last-child{margin-bottom:0}

@media (max-width:560px){
  .pair-row{grid-template-columns:1fr}
  .question-card{padding-left:44px}
  .timeline-era summary{display:grid}
}


/* Top-level library tabs */
.content-tabs{
  display:flex;
  gap:8px;
  margin:0 0 18px;
  padding:8px;
  background:#d8c19b;
  border:1px solid #b99567;
  border-radius:7px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35);
}
.content-tab{
  flex:1 1 0;
  cursor:pointer;
  border:1px solid #8c6039;
  border-radius:5px;
  padding:12px 16px;
  background:
    linear-gradient(rgba(255,255,255,.08),rgba(0,0,0,.03)),
    var(--oak);
  color:#fff8e8;
  box-shadow:0 3px 7px rgba(68,43,24,.16);
  font-family:Georgia,"Times New Roman",serif;
  font-size:1.05rem;
  font-weight:700;
  letter-spacing:.015em;
  transition:transform .15s ease, background .15s ease, box-shadow .15s ease;
}
.content-tab:hover{
  transform:translateY(-1px);
  background:var(--oak-light);
  color:#2f261d;
}
.content-tab.active{
  background:var(--forest-dark);
  border-color:#2b4034;
  color:#fff9e8;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.12),0 4px 10px rgba(52,50,35,.16);
}

@media (max-width:560px){
  .content-tabs{gap:5px;padding:6px}
  .content-tab{padding:10px 7px;font-size:.92rem}
}


/* Baby-step primers */
.primer{
  max-width:900px;
}
.primer-hero{
  padding-bottom:28px;
  margin-bottom:10px;
  border-bottom:2px solid var(--walnut);
}
.primer-hero h2{
  margin:.35rem 0 .7rem;
  font-size:clamp(1.9rem,3.6vw,3.2rem);
  line-height:1.02;
  color:var(--walnut);
}
.primer-chain{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:8px;
  margin:24px 0 4px;
  padding:18px;
  border:1px solid #d6c6a7;
  background:#f5eedf;
  border-radius:6px;
}
.primer-chain span{
  padding:8px 12px;
  background:#fffaf0;
  border:1px solid #cdb996;
  border-radius:4px;
  font-weight:700;
}
.primer-chain b{
  color:var(--forest-dark);
  font-family:Arial,sans-serif;
}
.primer-step{
  position:relative;
  margin:0;
  padding:38px 0 40px;
  border-bottom:1px solid #d7cbb7;
}
.primer-step-number{
  margin-bottom:8px;
  font-family:Arial,sans-serif;
  font-size:.7rem;
  font-weight:800;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--forest-dark);
}
.primer-step>h3{
  margin:0 0 14px;
  font-size:clamp(1.4rem,2.2vw,1.9rem);
  line-height:1.12;
  color:var(--walnut);
}
.primer-step-body{
  font-size:.94rem;
  line-height:1.62;
}
.primer-step-body>p{
  max-width:760px;
}
.primer-term{
  margin:18px 0;
  padding:14px 16px;
  border-left:4px solid var(--brass);
  background:#f6efe0;
  box-shadow:inset 0 0 0 1px rgba(151,119,72,.16);
}
.primer-label{
  margin:0 0 3px!important;
  font-family:Arial,sans-serif;
  font-size:.66rem!important;
  line-height:1.2!important;
  font-weight:800;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:#8a6a38;
}
.primer-term h3{
  margin:0 0 4px;
  font-size:1.3rem;
  color:var(--walnut);
}
.primer-term p:last-child{
  margin:0;
  max-width:720px;
}
.primer-sentence{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:22px 0;
  padding:18px;
  border:1px solid #d3c2a1;
  background:#f8f1e4;
  border-radius:6px;
}
.pword{
  display:grid;
  gap:3px;
  padding:8px 10px;
  border:1px solid #cbb58f;
  background:#fffaf1;
  border-radius:4px;
}
.pword b{font-size:1.05rem}
.pword small{
  font-family:Arial,sans-serif;
  font-size:.66rem;
  color:#6d6558;
}
.primer-tree{
  margin:24px 0;
  text-align:center;
}
.primer-tree-root{
  display:inline-block;
  padding:12px 18px;
  border:2px solid var(--forest-dark);
  background:#e7ede2;
  border-radius:5px;
  font-weight:800;
  color:#314638;
}
.primer-tree-branches{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
  margin-top:30px;
  position:relative;
}
.primer-tree-branches:before{
  content:"";
  position:absolute;
  left:25%;
  right:25%;
  top:-15px;
  height:1px;
  background:#8d7657;
}
.primer-tree-branches>div{
  position:relative;
  padding:14px;
  border:1px solid #ccb892;
  background:#faf5e9;
  border-radius:5px;
}
.primer-tree-branches>div:before{
  content:"";
  position:absolute;
  left:50%;
  top:-15px;
  height:15px;
  width:1px;
  background:#8d7657;
}
.primer-tree-branches strong,
.primer-tree-branches span{
  display:block;
}
.primer-tree-branches span{
  margin-top:5px;
  color:#665f55;
}
.language-road-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
  margin:24px 0;
}
.language-road{
  padding:16px;
  border:1px solid #ccb892;
  background:#faf5e9;
  border-radius:6px;
  text-align:center;
}
.language-road h3{
  margin:0 0 10px;
  color:var(--forest-dark);
  font-size:1.15rem;
}
.language-road p{
  margin:6px 0;
  padding:7px 6px;
  background:#fffaf1;
  border:1px solid #e0d2b9;
  border-radius:4px;
  font-size:.9rem;
}
.language-road b{
  display:block;
  color:#8c6b3e;
}
.primer-finish{
  margin-top:34px;
  padding:26px 28px;
  border:2px solid var(--forest-dark);
  background:#e7ede2;
  border-radius:6px;
}
.primer-finish h3{
  margin:4px 0 8px;
  color:#314638;
  font-size:1.55rem;
}
.primer-finish p:last-child{
  margin-bottom:0;
}

@media (max-width:720px){
  .language-road-grid{grid-template-columns:1fr}
  .primer-tree-branches{grid-template-columns:1fr}
  .primer-tree-branches:before{display:none}
  .primer-tree-branches>div:before{display:none}
  .primer-step{padding:30px 0 32px}
}