/* Beyond the Chatbot · One Layer Deeper — field-notebook visual language */

:root {
  --paper: #f6f1e7;
  --paper-2: #fbf8f1;
  --paper-3: #e9e2d3;
  --ink: #2b2a28;
  --ink-2: #6b6660;
  --rule: rgba(43, 42, 40, 0.07);
  --margin: #d9a5a0;
  --red: #b0412e;
  --red-dark: #8c3324;
  --serif: "Lora", Georgia, "Times New Roman", serif;
  --hand: "Caveat", "Segoe Print", "Bradley Hand", cursive;
  --measure: 40rem;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  background-image: repeating-linear-gradient(0deg, transparent 0, transparent 39px, var(--rule) 39px, var(--rule) 40px);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: clamp(1.25rem, 6vw, 5.5rem);
  width: 2px;
  background: var(--margin);
  opacity: 0.75;
  pointer-events: none;
}

a { color: var(--red); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { color: var(--red-dark); }

.page {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 1.25rem 4rem clamp(2.5rem, 10vw, 8rem);
}

/* Header / nav */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 2rem 0 1.25rem;
  border-bottom: 1px solid rgba(43, 42, 40, 0.15);
}
.brand { text-decoration: none; color: var(--ink); }
.brand .series { font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); display: block; }
.brand .chapter { font-weight: 600; font-size: 1.3rem; letter-spacing: -0.005em; }
.nav { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 0.95rem; }
.nav a { color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--red); color: var(--ink); }

/* Type */
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; text-wrap: pretty; margin: 0; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 3rem; }
h3 { font-size: 1.2rem; margin-top: 2rem; }
p { margin: 0 0 1.25rem; max-width: var(--measure); }
.lede { font-size: 1.3rem; line-height: 1.5; color: var(--ink); }
.label { font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); }
.hand { font-family: var(--hand); color: var(--red); font-size: 1.6rem; line-height: 1.3; }
.muted { color: var(--ink-2); }
hr { border: 0; border-top: 1px solid rgba(43, 42, 40, 0.15); margin: 3rem 0; max-width: var(--measure); }

/* Hero */
.hero { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 2.5rem; align-items: center; padding: 3.5rem 0 2rem; }
.hero svg { width: 100%; height: auto; display: block; }
@media (max-width: 720px) { .hero { grid-template-columns: 1fr; padding-top: 2.5rem; } }

/* Cards / lists */
.arcs { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem 2rem; }
@media (max-width: 720px) { .arcs { grid-template-columns: 1fr; } }
.arcs li { border-top: 1px solid rgba(43, 42, 40, 0.2); padding: 0.9rem 0 0.4rem; }
.arcs .n { font-size: 0.8rem; letter-spacing: 0.14em; color: var(--red); display: block; margin-bottom: 0.2rem; }
.arcs a { color: var(--ink); text-decoration: none; font-weight: 600; }
.arcs a:hover { color: var(--red); }

.editions { list-style: none; padding: 0; margin: 1.5rem 0 0; max-width: var(--measure); }
.editions li { display: grid; grid-template-columns: 3.5rem 1fr; gap: 1rem; padding: 0.9rem 0; border-top: 1px solid rgba(43, 42, 40, 0.15); align-items: baseline; }
.editions .num { font-size: 0.85rem; letter-spacing: 0.1em; color: var(--ink-2); }
.editions .title { font-weight: 600; text-decoration: none; color: var(--ink); }
.editions .title:hover { color: var(--red); }
.editions .meta { display: block; font-size: 0.9rem; color: var(--ink-2); margin-top: 0.15rem; }
.editions .upcoming .title { color: var(--ink-2); font-weight: 500; }
.tag { display: inline-block; font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--red); border: 1px solid var(--red); border-radius: 2px; padding: 0.05rem 0.4rem; margin-left: 0.5rem; vertical-align: middle; }

/* Syllabus */
.arc { margin-top: 2.5rem; max-width: var(--measure); }
.arc h2 { margin-top: 0; font-size: 1.45rem; }
.arc .label { display: block; margin-bottom: 0.35rem; }
.arc ol { margin: 0.75rem 0 0; padding-left: 1.4rem; }
.arc li { margin: 0.35rem 0; }
.arc li .exp { display: block; font-size: 0.95rem; color: var(--ink-2); }

/* Edition (article) */
.edition { max-width: var(--measure); }
.edition header { margin: 3rem 0 2rem; }
.edition header .label { display: block; margin-bottom: 0.75rem; }
.edition header h1 { font-size: clamp(1.9rem, 4.5vw, 2.75rem); }
.edition header .meta { margin-top: 0.75rem; color: var(--ink-2); font-size: 0.95rem; }
.edition .section-break { text-align: center; color: var(--ink-2); margin: 2rem 0; letter-spacing: 0.5em; }
.figure { margin: 2.5rem 0; }
.figure svg { width: 100%; height: auto; display: block; }
.figure figcaption { margin-top: 0.5rem; font-size: 0.95rem; color: var(--ink-2); font-style: italic; }
.deeper { margin-top: 3rem; padding: 1.25rem 1.5rem; background: var(--paper-2); border: 1px solid rgba(43, 42, 40, 0.15); }
.deeper .label { display: block; margin-bottom: 0.5rem; color: var(--red); }
.deeper p:last-child { margin-bottom: 0; }

/* Subscribe */
.subscribe { margin-top: 3.5rem; padding: 1.75rem 0 0; border-top: 2px solid var(--ink); max-width: var(--measure); }
.subscribe p { margin-bottom: 1rem; }
.button { display: inline-block; font-family: var(--serif); font-weight: 600; font-size: 1rem; color: var(--paper); background: var(--ink); text-decoration: none; padding: 0.7rem 1.2rem; border-radius: 2px; }
.button:hover { background: var(--red); color: var(--paper); }
.button.secondary { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.button.secondary:hover { color: var(--red); border-color: var(--red); }
.buttons { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* Footer */
.site-footer { margin-top: 4rem; padding-top: 1.25rem; border-top: 1px solid rgba(43, 42, 40, 0.15); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem; font-size: 0.9rem; color: var(--ink-2); font-style: italic; }
.site-footer a { color: var(--ink-2); }

/* Nav prev/next */
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid rgba(43, 42, 40, 0.15); max-width: var(--measure); font-size: 0.95rem; }
.pager a { text-decoration: none; }
.pager .muted { text-decoration: none; }

/* Notebook additions */
.how { margin-top: 3.5rem; max-width: 46rem; }
.how ol { list-style: none; padding: 0; margin: 1.25rem 0 0; counter-reset: how; }
.how li { position: relative; padding: 0.9rem 0 0.9rem 3.2rem; border-top: 1px solid rgba(43, 42, 40, 0.15); counter-increment: how; }
.how li::before { content: counter(how, decimal-leading-zero); position: absolute; left: 0; top: 0.95rem; font-size: 0.85rem; letter-spacing: 0.12em; color: var(--red); }
.how li strong { font-weight: 600; }
.now { margin-top: 3.5rem; max-width: var(--measure); border-top: 2px solid var(--ink); padding-top: 1.25rem; }
.now .label { display: block; margin-bottom: 0.5rem; }
.now .title { font-weight: 600; font-size: 1.25rem; text-decoration: none; color: var(--ink); }
.now .title:hover { color: var(--red); }
.now .next { margin-top: 0.5rem; color: var(--ink-2); font-size: 0.95rem; }
.contents { list-style: none; padding: 0; margin: 1.25rem 0 0; max-width: 46rem; }
.contents > li { border-top: 1px solid rgba(43, 42, 40, 0.2); padding: 1rem 0 0.5rem; }
.contents .sec { display: block; font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--red); margin-bottom: 0.2rem; }
.contents .sec-title { font-weight: 600; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.contents .sec-title:hover { color: var(--red); }
.contents ol { margin: 0.6rem 0 0; padding-left: 0; list-style: none; }
.contents ol li { display: grid; grid-template-columns: 2.6rem 1fr; gap: 0.5rem; padding: 0.25rem 0; font-size: 1rem; }
.contents ol li .n { color: var(--ink-2); font-size: 0.85rem; letter-spacing: 0.1em; padding-top: 0.15rem; }
.contents ol li a { color: var(--ink); text-decoration: none; }
.contents ol li a:hover { color: var(--red); }
.contents ol li.unwritten { color: var(--ink-2); }
.gloss { max-width: var(--measure); }
.gloss dt { font-weight: 600; margin-top: 1.5rem; }
.gloss dd { margin: 0.3rem 0 0; }
.gloss dd .ref { display: block; font-size: 0.9rem; color: var(--ink-2); margin-top: 0.25rem; }