/* ===== Design tokens ===== */
:root {
  --bg: #faf7f2;
  --bg-raised: #ffffff;
  --ink: #17140f;
  --ink-soft: #5c564c;
  --accent: #e63b2e;
  --accent-soft: #fdeceb;
  --line: #e5dfd4;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-serif: "Lora", Georgia, serif;
  --radius: 14px;
  --maxw: 66rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14110c;
    --bg-raised: #1e1a14;
    --ink: #f1ece2;
    --ink-soft: #a89f8f;
    --accent: #ff5a4d;
    --accent-soft: #3a1c18;
    --line: #2e2921;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* Site-wide punctuation motif: spans injected by accentPunctuation() in script.js */
.punct { color: var(--accent); }
h1 .punct, h2 .punct, h3 .punct { font-weight: 700; }

a { color: inherit; }

/* ===== Header ===== */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.6rem;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo-mark, .logo-dot { color: var(--accent); }

.lang-toggle {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.4rem 0.9rem;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-toggle:hover { background: var(--ink); color: var(--bg); }

/* ===== Hero ===== */
.hero {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 6rem 1.5rem 7rem;
  overflow: hidden;
}

.hero-net {
  position: absolute;
  inset: 0;
  left: 38%;
  pointer-events: none;
  user-select: none;
  opacity: 0.35;
}
.hero-net svg { width: 100%; height: 100%; display: block; }
.hero-net line {
  stroke: var(--ink-soft);
  stroke-width: 0.5;
  opacity: 0.28;
}
.hero-net circle {
  fill: none;
  stroke: var(--ink-soft);
  stroke-width: 1;
  opacity: 0.55;
}

.hero-glyph {
  position: absolute;
  top: -6rem;
  right: -2rem;
  font-family: var(--font-serif);
  font-size: 34rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.09;
  pointer-events: none;
  user-select: none;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0 0 1.5rem;
  max-width: 18ch;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 40rem;
  margin: 0 0 2.5rem;
}

.craft-badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 0.8rem;
  margin: 0 0 2.75rem;
  padding: 0;
  max-width: 40rem;
}

.craft-badges li {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 0.42rem 0.85rem;
  border: 1.5px solid var(--ink);
  border-radius: 8px;
  background: var(--bg-raised);
  transition: transform 0.2s;
}
.craft-badges li::before {
  content: "✱ ";
  color: var(--accent);
}
.craft-badges li:nth-child(1) { transform: rotate(-1.4deg); }
.craft-badges li:nth-child(2) { transform: rotate(1deg); }
.craft-badges li:nth-child(3) { transform: rotate(-0.8deg); }
.craft-badges li:nth-child(4) { transform: rotate(1.3deg); }
.craft-badges li:hover { transform: rotate(0); }

.hero-cta {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  transition: transform 0.15s, background 0.15s;
}
.hero-cta:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }

/* ===== Sections ===== */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
  border-top: 1px solid var(--line);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

.section-lead {
  color: var(--ink-soft);
  font-size: 1.12rem;
  max-width: 40rem;
  margin: 0 0 2.5rem;
}

/* ===== Demo ===== */

.demo-box {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  line-height: 1.8;
  background: var(--bg-raised);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  min-height: 9.5rem;
  margin: 2rem 0 1.25rem;
  box-shadow: 0 2px 20px rgba(0,0,0,0.04);
}

.demo-box .caret {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 0.9s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.demo-box .mark {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  width: 0;
  opacity: 0;
  transform: scale(0) translateY(0.15em);
}
.demo-box .mark.on {
  width: auto;
  opacity: 1;
  transform: scale(1);
  transition: transform 0.35s cubic-bezier(0.2, 2.2, 0.4, 1), opacity 0.2s;
}

.demo-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.demo-btn {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  padding: 0.85rem 1.6rem;
  border: none;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  cursor: default;
  pointer-events: none;
  transition: transform 0.12s, box-shadow 0.12s, opacity 0.2s;
  opacity: 0.55;
}
.demo-btn.armed { opacity: 1; box-shadow: 0 4px 18px rgba(230, 59, 46, 0.35); }
.demo-btn.pressed { transform: scale(0.93); box-shadow: none; }

.demo-status {
  color: var(--ink-soft);
  font-size: 0.95rem;
  min-height: 1.4em;
}
.demo-status.working::after {
  content: "";
  display: inline-block;
  width: 0.85em; height: 0.85em;
  margin-left: 0.45em;
  border: 2px solid var(--accent);
  border-top-color: transparent;
  border-radius: 50%;
  vertical-align: -0.1em;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.demo-note {
  position: relative;
  margin-top: 1.5rem;
  padding-left: 1.35rem;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.9rem;
  max-width: 40rem;
}
.demo-note::before {
  content: "✱";
  position: absolute;
  left: 0;
  top: 0.15em;
  font-style: normal;
  font-size: 0.85em;
  color: var(--accent);
}

/* ===== Steps ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2rem;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0.75rem 0 0.5rem;
}
.step p { margin: 0; color: var(--ink-soft); font-size: 1rem; }

.step-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  width: 2.3rem; height: 2.3rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
}

/* ===== Books ===== */
.books-group-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.82rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 1rem;
}
.books-group-test {
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px dashed var(--line);
  color: var(--accent);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: 1rem;
}

.book {
  background: var(--bg-raised);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  transition: transform 0.15s, border-color 0.15s;
}
.book:hover { transform: translateY(-3px); border-color: var(--accent); }

.book-title {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.3;
}
.book-author { color: var(--ink-soft); font-size: 0.88rem; }

.books-credit { margin-top: 2rem; color: var(--ink-soft); font-size: 0.95rem; }
.books-credit a { color: var(--accent); }

/* ===== Tech ===== */
.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.fact {
  background: var(--bg-raised);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.fact-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.9rem;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.fact-label { color: var(--ink-soft); font-size: 0.92rem; }

.arch { margin: 0 0 3rem; }

.arch-flow {
  display: flex;
  align-items: stretch;
}

.arch-node {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  text-align: center;
  background: var(--bg-raised);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 1rem 0.75rem;
}
.arch-out { border-color: var(--accent); }

.arch-t1 { font-family: var(--font-display); font-weight: 500; font-size: 0.98rem; }
.arch-t2 { font-size: 0.85rem; color: var(--ink-soft); }
.arch-out .arch-t2 { color: var(--accent); font-weight: 700; }

.arch-link {
  flex: none;
  align-self: center;
  width: 2rem;
  height: 1.5px;
  background: var(--ink-soft);
}

.arch figcaption { color: var(--ink-soft); font-size: 0.92rem; margin-top: 1rem; max-width: 40rem; }

@media (max-width: 640px) {
  .arch-flow { flex-direction: column; }
  .arch-node { width: 100%; flex: none; }
  .arch-link { width: 1.5px; height: 1.5rem; }
}

.roadmap-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 1.25rem;
}

.roadmap {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 30rem;
  display: flex;
  flex-direction: column;
}

.roadmap li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.roadmap li + li { margin-top: 1.1rem; }
.roadmap li + li::before {
  content: "";
  position: absolute;
  left: calc(1rem + 0.9rem - 0.75px);
  top: calc(-1.1rem - 1.5px);
  width: 1.5px;
  height: calc(1.1rem + 1.5px);
  background: var(--line);
}
.roadmap li.done + li.done::before { background: var(--accent); }
.roadmap li.done { border-color: var(--accent); color: var(--ink); }
.roadmap li.current { background: var(--accent-soft); }

.roadmap .stage {
  font-family: var(--font-display);
  font-weight: 700;
  flex: none;
  width: 1.8rem; height: 1.8rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  font-size: 0.85rem;
}
.roadmap li.done .stage { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ===== Links ===== */
.links-grid { display: grid; gap: 1rem; }

.link-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "kicker arrow" "name arrow";
  align-items: center;
  gap: 0.15rem 1rem;
  text-decoration: none;
  background: var(--bg-raised);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  transition: transform 0.15s, border-color 0.15s;
}
.link-card:hover { transform: translateY(-3px); border-color: var(--accent); }

.link-kicker {
  grid-area: kicker;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
}
.link-name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.08rem;
  overflow-wrap: anywhere;
}
.link-arrow {
  grid-area: arrow;
  font-size: 1.5rem;
  color: var(--accent);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--line);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.footer-ai {
  margin-top: 0.8rem;
  font-size: 0.88rem;
  max-width: 40rem;
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
}
.footer-author { margin-top: 1.2rem; font-size: 0.88rem; }

/* ===== Motion & small screens ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

@media (max-width: 480px) {
  .hero { padding: 3.5rem 1.5rem 4.5rem; }
  .hero-glyph { font-size: 20rem; top: -4rem; right: -3rem; }
  .hero-net { left: 15%; opacity: 0.22; }
  .section { padding: 3rem 1.5rem; }
  .demo-box { padding: 1.25rem 1.35rem; }
}