:root {
  --bg: #f7f5ef;
  --bg-card: #efece2;
  --ink: #0a0908;
  --ink-soft: #1c1a17;
  --mute: #7a7268;
  --rule: rgba(10, 9, 8, 0.12);
  --rule-soft: rgba(10, 9, 8, 0.06);
  --wine: #8b1f2d;
  --green: #2b6a3c;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.55;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a { color: inherit; }

/* Mono helper used inline */
.mono, .kicker, .bar-meta, .bar-link, .bar-spacer,
.foot-mid, .step-tag, .fit-label, .artifact, pre {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-feature-settings: "ss01", "ss02", "cv02", "calt";
}

.dim { color: var(--mute); }

/* subtle paper grain */
body::before {
  content: "";
  position: fixed;
  inset: -10%;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.04 0 0 0 0 0.035 0 0 0 0 0.03 0 0 0 0 0.32 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.5;
  mix-blend-mode: multiply;
}

::selection {
  background: var(--ink);
  color: var(--bg);
}

/* ════════ TOP BAR ════════ */

.bar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 1.25rem clamp(1rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  font-family: "Cabinet Grotesk", "Inter", sans-serif;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
}

.mark {
  color: var(--wine);
  margin-right: 0.3rem;
}

.bar-meta {
  font-size: 0.78rem;
  color: var(--mute);
  letter-spacing: 0;
}

.bar-spacer { flex: 1; }

.bar-link {
  text-decoration: none;
  font-size: 0.82rem;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.bar-link:hover { color: var(--wine); border-color: var(--wine); }
.bar-link .arr {
  display: inline-block;
  transition: transform 0.2s ease;
}
.bar-link:hover .arr { transform: translate(2px, -2px); }

/* ════════ MAIN ════════ */

main {
  flex: 1;
  width: 100%;
  max-width: 64rem;
  margin: 0 auto;
  padding: clamp(2rem, 6vh, 4rem) clamp(1rem, 4vw, 2.5rem) 4rem;
  position: relative;
  z-index: 2;
}

.section {
  margin: clamp(3rem, 7vh, 5rem) 0;
}

.kicker {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
  letter-spacing: 0;
}

hr.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}

/* ════════ HERO ════════ */

.hero {
  padding: clamp(2.5rem, 8vh, 5rem) 0 clamp(1.5rem, 4vh, 3rem);
  animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero h1 {
  font-family: "Cabinet Grotesk", "Inter", sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin-bottom: 1.75rem;
}

.hero h1 em {
  font-style: italic;
  font-weight: 500;
  color: var(--wine);
  letter-spacing: -0.025em;
}

.hero .sub {
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.55;
  max-width: 38rem;
  margin-bottom: 2.25rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
}

/* blinking caret */
.cursor {
  display: inline-block;
  width: 0.5ch;
  height: 0.95em;
  background: var(--wine);
  margin-left: 0.18ch;
  vertical-align: -0.08em;
  animation: blink 1.05s steps(2, start) infinite;
}

@keyframes blink { to { opacity: 0; } }

/* ════════ BUTTONS ════════ */

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: "Cabinet Grotesk", sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  color: var(--bg);
  background: var(--ink);
  padding: 0.95rem 1.35rem;
  border: 1px solid var(--ink);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn-primary:hover {
  background: var(--wine);
  border-color: var(--wine);
  transform: translateY(-1px);
}
.btn-primary .arr {
  display: inline-block;
  transition: transform 0.2s ease;
}
.btn-primary:hover .arr { transform: translateX(3px); }

.btn-primary.btn-lg {
  font-size: 1rem;
  padding: 1.1rem 1.6rem;
}

.btn-quiet {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.84rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.btn-quiet:hover {
  color: var(--wine);
  border-color: var(--wine);
}

/* ════════ SECTION HEADS ════════ */

.section-title {
  font-family: "Cabinet Grotesk", sans-serif;
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.section-deck {
  color: var(--ink-soft);
  font-size: 1rem;
  max-width: 36rem;
  margin-bottom: 2rem;
}

/* ════════ ARTIFACT ════════ */

.artifact {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.6rem clamp(1.1rem, 3vw, 2rem);
  overflow-x: auto;
  white-space: pre;
  position: relative;
  box-shadow:
    0 1px 0 rgba(10, 9, 8, 0.04),
    0 18px 40px -28px rgba(10, 9, 8, 0.30);
}

.artifact::before {
  content: "● ● ●";
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  font-size: 0.55rem;
  color: var(--rule);
  letter-spacing: 0.4em;
}

.art-c { color: var(--mute); font-style: italic; }
.art-k { color: var(--wine); font-weight: 500; }
.art-d { color: var(--ink-soft); }

/* ════════ STEPS ════════ */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.steps li {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.6rem 0;
  border-top: 1px solid var(--rule-soft);
}
.steps li:first-child { border-top: none; padding-top: 0.5rem; }

.step-tag {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--wine);
  letter-spacing: 0;
  padding-top: 0.35rem;
}

.steps h3 {
  font-family: "Cabinet Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.018em;
  margin-bottom: 0.4rem;
}

.steps p {
  color: var(--ink-soft);
  font-size: 0.98rem;
  max-width: 42rem;
}

/* ════════ FIT TABLE ════════ */

.fit {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.fit-col {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.4rem 1.5rem;
}

.fit-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  margin-bottom: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.fit-yes .fit-label { color: var(--green); }
.fit-no  .fit-label { color: var(--wine); }
.fit-yes .fit-label .dim { color: var(--green); opacity: 0.55; }
.fit-no  .fit-label .dim { color: var(--wine); opacity: 0.55; }

.fit ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.fit li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.96rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.fit-yes li::before {
  content: "+";
  position: absolute;
  left: 0;
  color: var(--green);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
}

.fit-no li::before {
  content: "−";
  position: absolute;
  left: 0;
  color: var(--wine);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
}

/* ════════ CLOSE ════════ */

.close {
  padding: clamp(2rem, 5vh, 3.5rem) 0 clamp(2rem, 4vh, 3rem);
}

.close-title {
  font-family: "Cabinet Grotesk", sans-serif;
  font-weight: 800;
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1rem;
}
.close-title em {
  font-style: italic;
  font-weight: 500;
  color: var(--wine);
}

.close-deck {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 36rem;
  margin-bottom: 2rem;
}

/* ════════ PAGE FOOT ════════ */

.page-foot {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem clamp(1rem, 4vw, 2.5rem);
  border-top: 1px solid var(--rule);
  font-size: 0.78rem;
  color: var(--mute);
}

.foot-mark {
  font-family: "Cabinet Grotesk", sans-serif;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.foot-mid {
  flex: 1;
  text-align: center;
}

.page-foot a {
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-foot a:hover {
  color: var(--wine);
  border-color: var(--wine);
}

/* ════════ ANIMATIONS ════════ */

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ════════ RESPONSIVE ════════ */

@media (max-width: 720px) {
  .fit { grid-template-columns: 1fr; }
  .steps li { grid-template-columns: 1fr; gap: 0.4rem; }
  .step-tag { padding-top: 0; }
}

@media (max-width: 560px) {
  .bar {
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    padding: 1rem;
  }
  .bar-meta { display: none; }
  .bar-spacer { display: none; }
  .hero h1 { font-size: 1.9rem; }
  .artifact { font-size: 0.74rem; padding: 1.1rem 1rem; }
  .page-foot {
    flex-direction: column;
    gap: 0.4rem;
    text-align: center;
  }
  .foot-mid { order: -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}