/* ============================================================
   Takshashila Scholar — editorial / scholarly press aesthetic
   Fraunces (display) + Newsreader (body). Warm paper, deep
   maroon, gold hairlines, a quiet lighthouse. Zero build.
   ============================================================ */

:root {
  --ink:        #1c1611;
  --ink-soft:   #463c33;
  --muted:      #7a6d5f;
  --paper:      #f6f1e7;
  --paper-2:    #fbf7ee;
  --raised:     #fffdf7;
  --maroon:     #5a0f22;
  --maroon-dp:  #420a18;
  --gold:       #b07d22;
  --gold-bright:#cf9a33;
  --rule:       rgba(28, 22, 17, 0.16);
  --rule-soft:  rgba(28, 22, 17, 0.08);
  --shadow:     0 1px 0 rgba(28,22,17,0.04), 0 18px 40px -28px rgba(66,10,24,0.45);
  --maxw:       1080px;
  --serif-d:    'Fraunces', Georgia, serif;
  --serif-b:    'Newsreader', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--serif-b);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 78% -8%, rgba(176,125,34,0.10), transparent 60%),
    radial-gradient(900px 520px at 6% 0%, rgba(90,15,34,0.07), transparent 55%),
    var(--paper);
  min-height: 100vh;
  font-variant-numeric: oldstyle-nums;
}

/* fine paper grain */
.grain {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 2rem; position: relative; z-index: 1; }

a { color: var(--maroon); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--gold); }

code {
  font-family: 'Newsreader', ui-monospace, monospace;
  background: rgba(176,125,34,0.13);
  padding: 0.05em 0.36em; border-radius: 3px; font-size: 0.94em;
}

/* ---------- Masthead ---------- */
.masthead { padding-top: 2.1rem; }
.masthead-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.brand { display: flex; align-items: center; gap: 0.95rem; text-decoration: none; color: var(--ink); }

.lighthouse { width: 34px; height: 46px; flex: none; }
.lighthouse path, .lighthouse rect { fill: var(--maroon); }
.lighthouse line { stroke: var(--paper); stroke-width: 1.6; }
.lighthouse .beam { fill: none; stroke: var(--gold-bright); stroke-width: 2; stroke-linecap: round; opacity: 0.9; }

.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-kicker {
  font-size: 0.7rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--muted); font-family: var(--serif-b); margin-bottom: 0.32rem;
}
.brand-title {
  font-family: var(--serif-d); font-weight: 600; font-size: 1.7rem;
  font-style: italic; color: var(--maroon); letter-spacing: 0.005em;
}

.masthead-nav { display: flex; align-items: center; gap: 1.6rem; }
.masthead-nav a { text-decoration: none; }
.ghost-btn.is-active { color: var(--maroon); border-bottom-color: var(--gold); }

/* ---------- Article (About) ---------- */
.article { max-width: 720px; padding: 4rem 0 4.5rem; }
.article .overline { margin-bottom: 1.4rem; }
.article .display { margin-bottom: 1.5rem; }
.article .standfirst { margin-bottom: 3rem; }
.article h2 {
  font-family: var(--serif-d); font-weight: 520; font-size: 1.62rem;
  color: var(--maroon); line-height: 1.18;
  margin: 3rem 0 1rem; padding-top: 1.6rem; border-top: 1px solid var(--rule);
}
.article p { font-size: 1.1rem; line-height: 1.74; color: var(--ink-soft); margin-bottom: 1.15rem; }
.article p strong { color: var(--ink); font-weight: 600; }
.article ul { margin: 0 0 1.3rem 1.3rem; }
.article li { font-size: 1.08rem; line-height: 1.7; color: var(--ink-soft); margin-bottom: 0.7rem; }
.article li strong { color: var(--maroon); font-family: var(--serif-d); font-weight: 560; }
.article table { border-collapse: collapse; width: 100%; margin: 1.4rem 0 1.6rem; font-size: 1rem; }
.article th, .article td { border: 1px solid var(--rule); padding: 0.65rem 0.85rem; text-align: left; }
.article th { background: rgba(90,15,34,0.06); font-family: var(--serif-d); font-weight: 560; color: var(--maroon); }
.article td { color: var(--ink-soft); }
.article-cta { margin-top: 2.6rem; padding-top: 1.8rem; border-top: 1px solid var(--rule); font-size: 1.15rem; }

.masthead-rule {
  height: 0; border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule-soft);
  margin: 1.6rem 0 0;
}
.masthead-rule::after {
  content: ""; display: block; max-width: var(--maxw); margin: 0 auto;
  height: 2px; background: var(--gold); width: 64px; position: relative; top: -1px;
  margin-left: 2rem;
}

/* ---------- Buttons ---------- */
.solid-btn, .line-btn, .ghost-btn {
  font-family: var(--serif-b); font-size: 0.95rem; cursor: pointer;
  border-radius: 2px; transition: background .18s, color .18s, border-color .18s, transform .18s;
}
.solid-btn {
  background: var(--maroon); color: var(--paper-2); border: 1px solid var(--maroon);
  padding: 0.62rem 1.5rem; letter-spacing: 0.01em;
}
.solid-btn:hover { background: var(--maroon-dp); border-color: var(--maroon-dp); }
.solid-btn:disabled { background: var(--muted); border-color: var(--muted); cursor: not-allowed; }
.line-btn {
  background: transparent; color: var(--maroon);
  border: 1px solid var(--rule); padding: 0.6rem 1.3rem;
}
.line-btn:hover { border-color: var(--maroon); background: rgba(90,15,34,0.05); }
.line-btn.small { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
.ghost-btn {
  background: transparent; color: var(--ink-soft); border: none;
  padding: 0.4rem 0.2rem; letter-spacing: 0.04em;
  border-bottom: 1px solid transparent;
}
.ghost-btn:hover { color: var(--maroon); border-bottom-color: var(--gold); }

/* ---------- Lede / hero ---------- */
.lede-wrap { padding: 4.5rem 0 5rem; }
.lede { max-width: 760px; }

.overline {
  font-size: 0.74rem; letter-spacing: 0.26em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 1.6rem;
  opacity: 0; animation: rise .8s .05s ease forwards;
}
.hero-strap {
  font-family: var(--serif-d);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(1.7rem, 4.6vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--maroon);
  margin-bottom: 1.4rem;
  padding-bottom: 1.1rem;
  position: relative;
  opacity: 0; animation: rise .8s .05s ease forwards;
}
.hero-strap em { font-style: italic; color: var(--gold); }
.hero-strap::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 64px; height: 3px; background: var(--gold);
}
.display {
  font-family: var(--serif-d);
  font-weight: 460;
  font-size: clamp(2.5rem, 6vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin-bottom: 1.7rem;
  opacity: 0; animation: rise .9s .12s ease forwards;
}
.display em { font-style: italic; color: var(--maroon); }
.standfirst {
  font-size: 1.2rem; line-height: 1.7; color: var(--ink-soft);
  max-width: 60ch;
  opacity: 0; animation: rise .9s .22s ease forwards;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Workflow grid ---------- */
.workflow-grid {
  list-style: none;
  margin-top: 3.4rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.workflow-grid > li {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  opacity: 0; animation: rise .7s ease forwards;
}
.workflow-grid > li:nth-child(1){ animation-delay:.28s }
.workflow-grid > li:nth-child(2){ animation-delay:.34s }
.workflow-grid > li:nth-child(3){ animation-delay:.40s }
.workflow-grid > li:nth-child(4){ animation-delay:.46s }
.workflow-grid > li:nth-child(5){ animation-delay:.52s }
.workflow-grid > li:nth-child(6){ animation-delay:.58s }

.workflow-card {
  display: block; width: 100%; height: 100%;
  text-align: left; background: transparent; border: none;
  padding: 2rem 1.7rem 2.1rem; cursor: pointer; position: relative;
  font-family: var(--serif-b);
  transition: background .22s;
}
.workflow-card::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.workflow-card:hover { background: var(--raised); }
.workflow-card:hover::after { transform: scaleX(1); }

.wf-index {
  font-family: var(--serif-d); font-size: 0.92rem; font-weight: 600;
  color: var(--gold); letter-spacing: 0.08em; display: block; margin-bottom: 1.1rem;
}
.workflow-card h3 {
  font-family: var(--serif-d); font-weight: 560; font-size: 1.3rem;
  color: var(--maroon); margin-bottom: 0.55rem; line-height: 1.15;
}
.workflow-card:hover h3 { color: var(--maroon-dp); }
.workflow-card p { color: var(--muted); font-size: 0.97rem; line-height: 1.55; }

/* ---------- Panel (settings) ---------- */
.panel {
  background: var(--raised);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--maroon);
  padding: 2.2rem;
  margin: 2.6rem 0;
  box-shadow: var(--shadow);
}
.panel-title { font-family: var(--serif-d); font-weight: 560; font-size: 1.5rem; margin-bottom: 0.6rem; }
.panel label {
  display: block; font-size: 0.78rem; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--ink-soft); margin: 1.4rem 0 0.5rem;
}
.panel input, .panel select {
  width: 100%; padding: 0.7rem 0.8rem; font-family: var(--serif-b); font-size: 1rem;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 2px;
}
.panel input:focus, .panel select:focus { outline: none; border-color: var(--maroon); }
.panel-actions { display: flex; gap: 0.8rem; margin-top: 1.6rem; }

/* ---------- Chat ---------- */
.chat { padding: 2.6rem 0 4rem; }
.chat-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding-bottom: 1.1rem; border-bottom: 1px solid var(--rule); margin-bottom: 1.6rem;
}
.chat-title { font-family: var(--serif-d); font-weight: 560; font-size: 1.6rem; color: var(--maroon); }

.messages {
  background: var(--raised);
  border: 1px solid var(--rule);
  padding: 1.8rem 2rem;
  min-height: 320px; max-height: 62vh; overflow-y: auto;
  box-shadow: var(--shadow);
}

.message { padding-bottom: 1.6rem; margin-bottom: 1.6rem; border-bottom: 1px solid var(--rule-soft); }
.message:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.message-role {
  font-family: var(--serif-b); font-size: 0.72rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 0.65rem;
}
.message.user .message-role { color: var(--gold); }
.message.assistant .message-role { color: var(--maroon); }
.message-content { white-space: normal; word-wrap: break-word; }
.message-content p { margin: 0 0 0.85rem; }
.message-content p:last-child { margin-bottom: 0; }
.message-content h1, .message-content h2, .message-content h3, .message-content h4 {
  font-family: var(--serif-d); color: var(--ink); margin: 1.3rem 0 0.6rem; line-height: 1.2;
}
.message-content h2 { font-size: 1.32rem; color: var(--maroon); }
.message-content h3 { font-size: 1.12rem; }
.message-content h4 { font-size: 1rem; }
.message-content ul, .message-content ol { margin: 0 0 0.9rem 1.3rem; }
.message-content li { margin-bottom: 0.3rem; }
.message-content strong { font-weight: 600; color: var(--ink); }
.message-content table { border-collapse: collapse; width: 100%; margin: 0.8rem 0 1rem; font-size: 0.96rem; }
.message-content th, .message-content td { border: 1px solid var(--rule); padding: 0.5rem 0.7rem; text-align: left; }
.message-content th { background: rgba(90,15,34,0.06); font-family: var(--serif-d); font-weight: 560; }
.message-content pre {
  background: #2a1d16; color: #f0e6d6; padding: 1rem 1.1rem;
  border-radius: 3px; overflow-x: auto; margin: 0 0 1rem;
}
.message-content pre code { background: transparent; padding: 0; color: inherit; }

.msg-tools { display: flex; gap: 0.6rem; margin-top: 1rem; }
.msg-tool {
  font-family: var(--serif-b); font-size: 0.78rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--muted);
  background: transparent; border: 1px solid var(--rule);
  padding: 0.34rem 0.75rem; border-radius: 2px; cursor: pointer;
  transition: color .15s, border-color .15s;
}
.msg-tool:hover { color: var(--maroon); border-color: var(--maroon); }

.thinking {
  color: var(--muted); font-style: italic; padding: 0.4rem 0;
}
.thinking::after {
  content: "···"; letter-spacing: 0.2em; animation: blink 1.2s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0.25; } }

.input-form { display: flex; gap: 0.9rem; align-items: stretch; margin-top: 1.4rem; }
.input-form textarea {
  flex: 1; padding: 0.85rem 1rem; font-family: var(--serif-b); font-size: 1.02rem;
  line-height: 1.55; background: var(--raised); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 2px; resize: vertical;
}
.input-form textarea:focus { outline: none; border-color: var(--maroon); }
.input-form .solid-btn { align-self: stretch; padding-inline: 1.8rem; }

/* ---------- Footer ---------- */
.site-footer { margin-top: 3rem; padding: 0 0 3.4rem; }
.footer-rule { height: 1px; background: var(--rule); margin-bottom: 1.6rem; }
.footer-main { font-size: 0.98rem; margin-bottom: 0.5rem; }
.footer-main strong { font-family: var(--serif-d); color: var(--maroon); font-weight: 600; }

/* ---------- Utility ---------- */
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; line-height: 1.55; }
.disclaimer { margin-top: 0.9rem; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .container { padding: 0 1.3rem; }
  .lede-wrap { padding: 3rem 0 3.4rem; }
  .workflow-grid { grid-template-columns: 1fr; }
  .input-form { flex-direction: column; }
  .input-form .solid-btn { width: 100%; }
  .masthead-rule::after { margin-left: 1.3rem; }

  /* Masthead: let the nav wrap below the brand instead of overflowing */
  .masthead { padding-top: 1.6rem; }
  .masthead-inner { flex-wrap: wrap; gap: 0.5rem 0.9rem; }
  .masthead-nav { gap: 1rem; font-size: 0.88rem; flex-wrap: wrap; }
  .brand-title { font-size: 1.45rem; }
  .brand-kicker { font-size: 0.64rem; }
  .lighthouse { width: 28px; height: 38px; }

  /* Chat and About tables: scroll inside their own box, never the page */
  .message-content table,
  .article table { display: block; overflow-x: auto; font-size: 0.9rem; white-space: normal; }
}

/* ---------- Router: choose a path ---------- */
.route-list { list-style: none; margin-top: 3rem; display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--rule); }
.route-list > li { border-bottom: 1px solid var(--rule); opacity: 0; animation: rise .7s ease forwards; }
.route-list > li:nth-child(1){ animation-delay:.28s }
.route-list > li:nth-child(2){ animation-delay:.36s }
.route-list > li:nth-child(3){ animation-delay:.44s }

.route-card {
  display: grid; grid-template-columns: 110px 1fr; gap: 1.8rem; align-items: start;
  width: 100%; text-align: left; background: transparent; border: none;
  padding: 2.1rem 1rem 2.1rem 0.2rem; cursor: pointer; font-family: var(--serif-b);
  transition: background .2s, padding-left .2s;
}
.route-card:hover { background: var(--raised); padding-left: 1.2rem; }
.route-tag {
  font-family: var(--serif-d); font-style: italic; font-size: 1.05rem;
  color: var(--gold); padding-top: 0.15rem;
}
.route-card h3 {
  font-family: var(--serif-d); font-weight: 560; font-size: 1.55rem;
  color: var(--maroon); margin-bottom: 0.5rem; line-height: 1.12;
}
.route-card:hover h3 { color: var(--maroon-dp); }
.route-card p { color: var(--ink-soft); font-size: 1.02rem; max-width: 64ch; margin-bottom: 0.9rem; }
.route-flow {
  display: inline-block; font-size: 0.84rem; letter-spacing: 0.04em;
  color: var(--muted); font-variant: small-caps; text-transform: lowercase;
}
.route-flow i { font-style: italic; opacity: 0.7; }

.route-newhere { margin-top: 2.4rem; font-size: 0.97rem; color: var(--muted); }
.route-aside { margin-top: 0.6rem; font-size: 0.97rem; color: var(--muted); }

.student-steps { margin: 1.2rem 0 1.4rem 1.3rem; }
.student-steps li { font-size: 1.05rem; line-height: 1.7; color: var(--ink-soft); margin-bottom: 0.7rem; padding-left: 0.3rem; }
.student-steps li strong { color: var(--maroon); font-family: var(--serif-d); font-weight: 560; }
#student-start p { font-size: 1.05rem; line-height: 1.7; color: var(--ink-soft); margin-bottom: 0.9rem; }
#student-start .back-to-router { display: inline-block; margin-bottom: 1.4rem; }
.text-link {
  background: none; border: none; padding: 0; cursor: pointer;
  font-family: var(--serif-b); font-size: inherit; color: var(--maroon);
  border-bottom: 1px solid var(--gold); line-height: 1.2;
}
.text-link:hover { color: var(--gold); }

/* ---------- Path view ---------- */
.path-view { padding: 3rem 0 4rem; }
.back-to-router { margin-bottom: 2rem; display: inline-block; }
.path-title { font-family: var(--serif-d); font-weight: 500; font-size: clamp(1.9rem,4vw,2.7rem); color: var(--ink); line-height: 1.1; margin-bottom: 0.7rem; }
.path-sub { font-size: 1.12rem; color: var(--ink-soft); max-width: 62ch; margin-bottom: 2.4rem; }

/* ---------- Rail ---------- */
.rail { display: flex; flex-wrap: wrap; align-items: center; gap: 0.55rem; }
.rail-lg { margin-bottom: 2.6rem; }
.rail-sm { margin-bottom: 1.4rem; padding-bottom: 1.2rem; border-bottom: 1px solid var(--rule-soft); }
.rail-node {
  font-family: var(--serif-b); font-size: 0.78rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--muted);
  padding: 0.34rem 0.7rem; border: 1px solid var(--rule); border-radius: 2px;
  background: transparent; white-space: nowrap;
}
.rail-node.is-done { color: var(--maroon); border-color: rgba(90,15,34,0.35); }
.rail-node.is-current {
  color: var(--paper-2); background: var(--maroon); border-color: var(--maroon);
  font-weight: 600;
}
.rail-node.is-draft { font-style: italic; text-transform: none; letter-spacing: 0.04em; border-style: dashed; }
.rail-sep { color: var(--rule); font-size: 0.85rem; }
.rail-sm .rail-node { font-size: 0.7rem; padding: 0.26rem 0.55rem; }

/* ---------- Stage list ---------- */
.stage-list { list-style: none; border-top: 1px solid var(--rule); }
.stage-row {
  display: grid; grid-template-columns: 44px 1fr auto; gap: 1.4rem; align-items: center;
  padding: 1.7rem 0.6rem 1.7rem 0.2rem; border-bottom: 1px solid var(--rule);
  cursor: pointer; transition: background .18s, padding-left .18s;
}
.stage-row:not(.is-draft):hover { background: var(--raised); padding-left: 1rem; }
.stage-num { font-family: var(--serif-d); font-size: 1.2rem; color: var(--gold); font-weight: 600; }
.stage-body h4 { font-family: var(--serif-d); font-weight: 560; font-size: 1.28rem; color: var(--maroon); margin-bottom: 0.3rem; }
.stage-body p { color: var(--muted); font-size: 0.97rem; max-width: 62ch; }
.stage-cta { font-size: 0.9rem; color: var(--maroon); white-space: nowrap; }
.stage-row.is-draft { cursor: default; opacity: 0.78; }
.stage-row.is-draft .stage-body h4 { color: var(--ink-soft); font-style: italic; }
.stage-row.is-draft .stage-num { color: var(--muted); }

/* ---------- Carryover note ---------- */
.carry-note {
  background: rgba(176,125,34,0.12); border-left: 3px solid var(--gold);
  padding: 0.85rem 1.1rem; font-size: 0.93rem; color: var(--ink-soft);
  margin-bottom: 1.2rem; border-radius: 2px;
}
.carry-note strong { font-family: var(--serif-d); color: var(--maroon); }

/* ---------- Next step ---------- */
.next-step {
  margin-top: 1.6rem; padding: 1.6rem 1.7rem;
  background: var(--raised); border: 1px solid var(--rule);
  border-left: 3px solid var(--maroon); border-radius: 2px;
}
.next-label {
  font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 0.5rem;
}
.next-step h4 { font-family: var(--serif-d); font-weight: 560; font-size: 1.3rem; color: var(--maroon); margin-bottom: 0.4rem; }
.next-step p { font-size: 0.98rem; margin-bottom: 0.6rem; }
.next-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1rem; }

@media (max-width: 600px) {
  .route-card { grid-template-columns: 1fr; gap: 0.6rem; }
  .stage-row { grid-template-columns: 32px 1fr; }
  .stage-cta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .overline, .hero-strap, .display, .standfirst, .workflow-grid > li, .route-list > li { opacity: 1; }
}