/* Project Ouroboros companion site — Lithos-style Codex chrome. */

:root {
  --font-sans: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --font-serif: "Source Serif 4", "Iowan Old Style", Palatino, Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --ink: #0f1218;
  --raised: #171b24;
  --panel: #1c2230;
  --accent: #6fd3a0;
  --accent-dim: #3f8f6a;
  --copper: #c48a4a;
  --paper: #e8e4dc;
  --muted: #9aa3b2;
  --rule: #2a3140;
  --danger: #c45c45;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--ink);
  color: var(--paper);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgb(111 211 160 / 8%), transparent 50%),
    radial-gradient(900px 400px at 100% 0%, rgb(196 138 74 / 10%), transparent 45%),
    var(--ink);
}

::selection {
  background: rgb(111 211 160 / 30%);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--copper);
}

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--copper);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  width: 100%;
  border-bottom: 1px solid var(--rule);
  background: rgb(15 18 24 / 85%);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.brand:hover {
  color: inherit;
}

.brand-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--paper);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--paper);
}

.site-main {
  flex: 1;
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.site-footer {
  border-top: 1px solid var(--rule);
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.25rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-note {
  color: var(--accent-dim);
  margin: 0;
}

.footer-note a {
  color: var(--accent);
  text-decoration: none;
}

.footer-note a:hover {
  color: var(--copper);
  text-decoration: underline;
}

.site-footer p {
  margin: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-dim);
  margin: 0 0 0.75rem;
}

.crumb {
  margin-bottom: 1.25rem;
}

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.lede {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--muted);
  max-width: 40rem;
  margin: 0 0 1.5rem;
}

.lede.narrow {
  max-width: 42rem;
}

.muted {
  color: var(--muted);
}

.btn-solid,
.btn-ghost {
  display: inline-block;
  padding: 0.55rem 1rem;
  font-weight: 500;
  text-decoration: none;
  font-size: 0.95rem;
}

.btn-solid {
  background: var(--accent);
  color: var(--ink);
}

.btn-solid:hover {
  background: #8be0b4;
  color: var(--ink);
}

.btn-ghost {
  border: 1px solid var(--rule);
  color: var(--paper);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }

  .hero-art {
    position: sticky;
    top: 5.5rem;
  }
}

.hero-copy h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.12;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.slot-card {
  background: linear-gradient(180deg, rgb(28 34 48 / 92%), rgb(15 18 24 / 92%));
  border: 1px solid var(--rule);
  box-shadow: inset 0 1px 0 rgb(111 211 160 / 10%);
  padding: 1.15rem 1.25rem;
}

.slot-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.slot-card ol {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  display: grid;
  gap: 0.65rem;
  font-size: 0.95rem;
}

.slot-card ol span {
  color: var(--paper);
}

.art-frame {
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--raised);
  overflow: hidden;
}

.art-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.card-grid {
  margin-top: 3rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.card-link {
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease;
}

.card-link:hover {
  border-color: rgb(111 211 160 / 55%);
  color: inherit;
}

.card-link h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0;
  color: var(--paper);
}

.card-link p {
  margin: 0.55rem 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.volume-card {
  display: grid;
  gap: 1.5rem;
  text-decoration: none;
  color: inherit;
  margin: 2rem 0 3rem;
  padding: 1rem;
  border: 1px solid var(--rule);
  background: linear-gradient(180deg, rgb(28 34 48 / 70%), rgb(15 18 24 / 70%));
}

.volume-card:hover {
  border-color: rgb(111 211 160 / 50%);
  color: inherit;
}

@media (min-width: 720px) {
  .volume-card {
    grid-template-columns: minmax(0, 14rem) minmax(0, 1fr);
    align-items: center;
  }
}

.volume-meta h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin: 0.35rem 0 0.5rem;
}

.start-link {
  margin: 1rem 0 0;
  color: var(--accent);
  font-weight: 500;
}

.act-block {
  margin: 2.5rem 0;
}

.chapter-list {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.45rem;
}

.chapter-list a {
  color: var(--paper);
  text-decoration: none;
}

.chapter-list a:hover,
.chapter-list a.is-current {
  color: var(--accent);
}

.chapter-plate {
  margin: 0 0 1.5rem;
  max-width: 48rem;
}

.prose-novel,
.prose-codex {
  max-width: 42rem;
}

.prose-novel {
  font-family: var(--font-serif);
}

.prose-novel h1,
.prose-codex h1,
.prose-codex h2,
.prose-codex h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.prose-novel h1 {
  font-size: 2.1rem;
  line-height: 1.15;
  margin: 0 0 1.25rem;
}

.prose-codex h1.page-title,
.prose-codex > h1:first-child {
  font-size: clamp(2rem, 4vw, 2.6rem);
  margin-bottom: 1rem;
}

.prose-codex h2 {
  font-size: 1.3rem;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--rule);
}

.prose-codex h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
}

.prose-novel p,
.prose-novel li,
.prose-codex p,
.prose-codex li {
  color: rgb(232 228 220 / 90%);
  line-height: 1.7;
}

.prose-novel p,
.prose-novel li {
  font-size: 1.08rem;
  line-height: 1.85;
}

.prose-novel p + p {
  margin-top: 1.35rem;
}

.prose-codex p + p {
  margin-top: 1rem;
}

.prose-novel pre,
.prose-codex pre {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  background: var(--raised);
  border: 1px solid var(--rule);
  padding: 1rem;
  overflow-x: auto;
}

.prose-novel code,
.prose-codex code {
  font-family: var(--font-mono);
}

.prose-novel blockquote,
.prose-codex blockquote {
  margin: 1.2rem 0;
  padding-left: 1rem;
  border-left: 2px solid var(--accent-dim);
  color: var(--muted);
}

.prose-codex ul,
.prose-codex ol {
  margin: 0.85rem 0 0.85rem 1.2rem;
}

.prose-codex hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 1.75rem 0;
}

.prose-novel hr {
  border: 0;
  text-align: center;
  margin: 2.5rem 0;
}

.prose-novel hr::before {
  content: "◆ ◆ ◆";
  color: var(--muted);
  letter-spacing: 0.45em;
  font-size: 0.85rem;
}

.chapter-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 3rem 0 1rem;
  max-width: 42rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
}

.pager-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-decoration: none;
  color: var(--paper);
  padding: 0.75rem 0;
}

.pager-link:hover {
  color: var(--accent);
}

.pager-link[rel="next"],
.pager-link:last-child:not([rel="prev"]) {
  text-align: right;
  align-items: flex-end;
}

.pager-dir {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.pager-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
}

.kbd-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  max-width: 42rem;
}

.kbd-hint kbd {
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 0.05rem 0.35rem;
  color: var(--paper);
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
  }

  .chapter-pager {
    grid-template-columns: 1fr;
  }

  .pager-link[rel="next"],
  .pager-link:last-child:not([rel="prev"]) {
    text-align: left;
    align-items: flex-start;
  }
}