:root {
  color-scheme: dark;
  --bg: #14171c;
  --bg-2: #1b1f26;
  --panel: #1f242c;
  --ink: #ede6d6;
  --muted: #9c9686;
  --faint: #6b665a;
  --brass: #c9a227;
  --brass-soft: rgba(201, 162, 39, 0.14);
  --brass-line: rgba(201, 162, 39, 0.45);
  --verdigris: #4c8a6a;
  --line: rgba(237, 230, 214, 0.12);
  --shadow: rgba(0, 0, 0, 0.5);
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 0%, rgba(201, 162, 39, 0.08), transparent 32rem),
    linear-gradient(180deg, #16191f 0%, #101318 55%, #0d0f13 100%);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
.save-pill:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  display: block;
}

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--brass);
  margin: 0 0 0.6rem;
}

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(20, 23, 28, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.05rem;
}

.brand img {
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 0.35rem;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 1.5rem);
  font-size: 0.85rem;
  color: var(--muted);
}

nav a {
  transition: color 150ms ease;
}

nav a:hover {
  color: var(--ink);
}

.nav-cta {
  border: 1px solid var(--brass-line);
  border-radius: 0.4rem;
  padding: 0.45rem 0.85rem;
  color: var(--brass);
  background: var(--brass-soft);
}

.nav-cta:hover {
  color: var(--ink);
  border-color: var(--brass);
}

/* ---------- layout scaffolding ---------- */

main > section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.2rem, 4vw, 2rem);
}

.section-head {
  max-width: 40rem;
  margin: 0 0 2.6rem;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 0.3rem;
}

.section-head p:not(.eyebrow) {
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.6;
  margin-top: 0.9rem;
}

.section-head.compact {
  margin-bottom: 2rem;
}

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
  padding-top: clamp(3.5rem, 9vw, 6rem) !important;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.1rem);
  line-height: 1.12;
  margin-bottom: 1.1rem;
}

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
  max-width: 34rem;
  margin: 0 0 1.8rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.75rem 1.3rem;
  border-radius: 0.5rem;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.btn-primary {
  background: var(--brass);
  color: #1a1503;
}

.btn-primary:hover {
  transform: translateY(-1px);
  background: #dcb531;
}

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

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

.hero-fineprint {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--faint);
  margin: 0;
}

/* ---------- hero visual: the index card ---------- */

.hero-visual {
  display: flex;
  justify-content: center;
}

.index-card {
  position: relative;
  width: min(100%, 22rem);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  padding: 1.4rem 1.4rem 2.2rem;
  box-shadow: 0 1.5rem 3rem var(--shadow);
}

.card-head {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.card-head .dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--line);
}

.card-line {
  font-size: 0.88rem;
  line-height: 1.55;
  margin: 0 0 0.7rem;
}

.card-line--muted {
  color: var(--faint);
}

.card-line--highlight {
  color: var(--ink);
  background: var(--brass-soft);
  box-shadow: 0 0 0 3px var(--brass-soft);
  border-radius: 0.2rem;
  display: inline;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.save-pill {
  position: absolute;
  right: 1.6rem;
  bottom: 2.6rem;
  background: #0f1216;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  box-shadow: 0 0.5rem 1rem var(--shadow);
  animation: pill-pulse 3.6s ease-in-out infinite;
}

.stamp {
  position: absolute;
  right: 1.3rem;
  bottom: 0.9rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--verdigris);
  border: 1.5px solid var(--verdigris);
  border-radius: 0.3rem;
  padding: 0.15rem 0.5rem;
  transform: rotate(-7deg);
  opacity: 0;
  animation: stamp-appear 3.6s ease-in-out infinite;
}

@keyframes pill-pulse {
  0%, 55% { opacity: 1; transform: translateY(0); }
  70%, 100% { opacity: 0; transform: translateY(4px); }
}

@keyframes stamp-appear {
  0%, 60% { opacity: 0; transform: rotate(-7deg) scale(0.8); }
  72%, 92% { opacity: 1; transform: rotate(-7deg) scale(1); }
  100% { opacity: 0; transform: rotate(-7deg) scale(1); }
}

/* ---------- sequence ---------- */

.sequence-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.sequence-rail article {
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
}

.seq-number {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--brass);
  margin-bottom: 0.6rem;
}

.sequence-rail h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.sequence-rail p {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
}

/* ---------- file preview ---------- */

.md-card {
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  overflow: hidden;
  background: #0e1013;
  max-width: 38rem;
}

.md-card-bar {
  padding: 0.65rem 1rem;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  color: var(--muted);
}

.md-card-body {
  margin: 0;
  padding: 1.2rem 1.3rem 1.4rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre-wrap;
}

.md-rule {
  color: var(--faint);
}

.md-key {
  color: var(--brass);
}

.md-str {
  color: var(--verdigris);
}

/* ---------- principles ---------- */

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.principle-grid article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  padding: 1.4rem 1.4rem 1.5rem;
}

.principle-grid h3 {
  font-size: 1.02rem;
  margin-bottom: 0.6rem;
}

.principle-grid p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

/* ---------- sources ---------- */

.source-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.source-badge {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  padding: 0.5rem 0.9rem;
  border-radius: 0.4rem;
  border: 1px solid var(--brass-line);
  color: var(--brass);
  background: var(--brass-soft);
}

.source-badge--soon {
  border-color: var(--line);
  color: var(--faint);
  background: transparent;
}

.sources-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.sources-note a {
  color: var(--brass);
  border-bottom: 1px solid var(--brass-line);
}

/* ---------- community ---------- */

.community-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  margin-top: 0.6rem;
}

.community-links a {
  font-size: 0.92rem;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.15rem;
  transition: border-color 150ms ease, color 150ms ease;
}

.community-links a:hover {
  color: var(--brass);
  border-color: var(--brass-line);
}

/* ---------- footer ---------- */

footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  padding: 2rem 1.2rem 3rem;
  color: var(--faint);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  border-top: 1px solid var(--line);
}

footer a {
  color: var(--muted);
  transition: color 150ms ease;
}

footer a:hover {
  color: var(--brass);
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .sequence-rail,
  .principle-grid {
    grid-template-columns: 1fr;
  }

  nav a:not(.nav-cta) {
    display: none;
  }
}