:root {
  color-scheme: light;
  --paper: #fafaf9;
  --surface: #ffffff;
  --ink: #0a0a0a;
  --ink-soft: #1c1917;
  --muted: #57534e;
  --muted-2: #78716c;
  --line: #e7e5e4;
  --line-soft: #f5f5f4;
  --accent: #15803d;
  --accent-hover: #166534;
  --accent-soft: #dcfce7;
  --accent-ink: #052e16;

  --term-bg: #0c0d0c;
  --term-surface: #161816;
  --term-line: #262826;
  --term-text: #d6d3d1;
  --term-muted: #78716c;
  --term-green: #4ade80;
  --term-blue: #60a5fa;
  --term-amber: #fbbf24;
  --term-red: #f87171;

  --shadow-sm: 0 1px 2px rgba(10, 10, 10, 0.04);
  --shadow-md: 0 12px 32px rgba(10, 10, 10, 0.06);
  --shadow-lg: 0 30px 80px rgba(10, 10, 10, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-feature-settings: "cv11", "ss01", "ss03";
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* -------------------- Header -------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 14px clamp(20px, 4vw, 56px);
  border-bottom: 1px solid rgba(10, 10, 10, 0.06);
  background: rgba(250, 250, 249, 0.82);
  backdrop-filter: saturate(160%) blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 6px;
  background: var(--ink);
  color: var(--accent-soft);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 14px;
}

.nav a {
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
}

.nav a:hover {
  color: var(--ink);
  background: var(--line-soft);
}

.header-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-self: end;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  font-size: 14px;
  font-weight: 600;
  transition: border-color 0.15s ease, transform 0.15s ease;
  box-shadow: var(--shadow-sm);
}

.header-action:hover {
  border-color: var(--ink);
}

.header-action::after {
  content: "→";
  font-weight: 500;
  transition: transform 0.15s ease;
}

.header-action:hover::after {
  transform: translateX(2px);
}

/* -------------------- Hero -------------------- */

.hero {
  position: relative;
  padding: clamp(56px, 7vw, 96px) clamp(20px, 4vw, 56px) clamp(48px, 6vw, 80px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 70% at 85% 10%, rgba(21, 128, 61, 0.06), transparent 60%),
    radial-gradient(40% 50% at 10% 80%, rgba(21, 128, 61, 0.04), transparent 60%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(36px, 5vw, 72px);
  width: min(100%, 1240px);
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(21, 128, 61, 0.15);
}

h1, h2, h3, p {
  margin-top: 0;
}

h1 {
  margin: 0 0 22px;
  font-size: clamp(40px, 5.4vw, 72px);
  line-height: 1;
  letter-spacing: -0.035em;
  font-weight: 600;
}

h1 .accent {
  color: var(--accent);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 600;
}

h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.lede {
  max-width: 540px;
  margin: 0 0 32px;
  color: var(--muted);
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button.primary:hover {
  background: var(--ink-soft);
  transform: translateY(-1px);
}

.button.secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

.button.secondary:hover {
  border-color: var(--ink);
}

.button .arrow {
  transition: transform 0.15s ease;
}

.button:hover .arrow {
  transform: translateX(2px);
}

.hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.hero-meta strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.02em;
}

/* -------------------- Terminal -------------------- */

.terminal {
  display: flex;
  flex-direction: column;
  margin: 0;
  border: 1px solid var(--term-line);
  border-radius: 12px;
  background: var(--term-bg);
  color: var(--term-text);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--term-line);
  background: var(--term-surface);
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--term-line);
}

.terminal-dot:nth-child(1) { background: #ef4444; }
.terminal-dot:nth-child(2) { background: #f59e0b; }
.terminal-dot:nth-child(3) { background: #22c55e; }

.terminal-title {
  margin-left: 6px;
  color: var(--term-muted);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.terminal-body {
  margin: 0;
  padding: 22px 22px 26px;
  font-size: 13.5px;
  line-height: 1.65;
  white-space: pre;
  overflow-x: auto;
}

.term-prompt { color: var(--term-green); margin-right: 8px; }
.term-cmd    { color: var(--term-text); font-weight: 500; }
.term-flag   { color: var(--term-amber); }
.term-arg    { color: var(--term-blue); }
.term-ok     { color: var(--term-green); }
.term-warn   { color: var(--term-amber); }
.term-muted  { color: var(--term-muted); }
.term-label  { color: var(--term-amber); font-weight: 600; }
.term-arrow  { color: var(--term-blue); }
.term-path   { color: var(--term-blue); }

/* -------------------- Statement -------------------- */

.statement {
  padding: clamp(60px, 7vw, 96px) clamp(20px, 4vw, 56px);
  background: var(--ink);
  color: var(--paper);
}

.statement-inner {
  width: min(100%, 1180px);
  margin: 0 auto;
}

.statement p {
  max-width: 980px;
  margin: 0;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 500;
}

.statement .accent {
  color: var(--term-green);
}

/* -------------------- Sections -------------------- */

.section {
  padding: clamp(72px, 9vw, 128px) clamp(20px, 4vw, 56px);
}

.section-inner {
  width: min(100%, 1180px);
  margin: 0 auto;
}

.split-section .section-inner,
.grid-section .section-inner,
.repo-section .section-inner {
  display: grid;
  gap: clamp(28px, 5vw, 72px);
}

.split-section .section-inner {
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
}

.grid-section .section-inner {
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
}

.repo-section .section-inner {
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.7fr);
  align-items: start;
}

.split-section {
  border-bottom: 1px solid var(--line);
}

.copy-stack {
  display: grid;
  gap: 18px;
  max-width: 720px;
}

.copy-stack p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.45;
}

/* -------------------- Feature grid (The Model) -------------------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.feature {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 200px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.feature:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}

.feature code {
  display: inline;
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--line-soft);
  color: var(--ink-soft);
  font-size: 12.5px;
}

/* -------------------- System grid (Inside the Harness) -------------------- */

.system-section {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--line);
  overflow: hidden;
}

.system-item {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 230px;
  padding: 28px;
  background: var(--surface);
  transition: background 0.15s ease;
}

.system-item:hover {
  background: var(--line-soft);
}

.system-item-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.system-item-label::before {
  content: "//";
  color: var(--muted-2);
  font-weight: 500;
}

.system-item h3 {
  max-width: 440px;
}

.system-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}

.system-item code {
  display: inline;
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--line-soft);
  color: var(--ink-soft);
  font-size: 12.5px;
}

/* -------------------- Workflow (dark) -------------------- */

.workflow {
  background: var(--ink);
  color: var(--paper);
}

.workflow .eyebrow {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  color: rgba(250, 250, 249, 0.7);
}

.workflow h2 {
  color: var(--paper);
}

.workflow .section-heading {
  max-width: 760px;
  margin-bottom: 40px;
}

.workflow .section-heading p {
  max-width: 640px;
  margin: 0;
  color: rgba(250, 250, 249, 0.6);
  font-size: 17px;
}

.stage-tabs {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 14px;
  padding: 6px;
  border: 1px solid var(--term-line);
  border-radius: 10px;
  background: var(--term-surface);
}

.stage-tab {
  min-height: 40px;
  padding: 8px 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--term-muted);
  font: inherit;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.stage-tab:hover {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.04);
}

.stage-tab.is-active {
  background: var(--accent);
  color: #fff;
}

.stage-terminal {
  margin-top: 14px;
}

.stage-panel {
  padding: clamp(28px, 4vw, 44px);
}

.stage-kicker {
  margin: 0 0 14px;
  color: var(--term-amber);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stage-panel h3 {
  max-width: 780px;
  margin-bottom: 14px;
  color: var(--paper);
  font-size: clamp(24px, 3vw, 36px);
  letter-spacing: -0.025em;
}

.stage-panel > p {
  max-width: 720px;
  margin: 0 0 28px;
  color: rgba(250, 250, 249, 0.65);
  font-size: 16px;
  line-height: 1.55;
}

.stage-command {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--term-line);
  border-radius: 8px;
  background: var(--term-surface);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 14px;
}

.stage-command .term-prompt {
  margin: 0;
}

.stage-command code {
  display: inline;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-size: 14px;
}

/* -------------------- Staff -------------------- */

.staff-section {
  background: var(--paper);
}

.staff-section .section-heading {
  max-width: 860px;
  margin-bottom: 40px;
}

.staff-section .section-heading p {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.staff-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.staff-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.staff-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.staff-mono {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--accent-soft);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 18px;
  font-weight: 600;
}

.staff-meta {
  min-width: 0;
}

.staff-role {
  display: block;
  margin-bottom: 4px;
  color: var(--accent);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.staff-meta h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.staff-meta p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

/* -------------------- Bands (Principles) -------------------- */

.bands {
  padding: 0;
  background: var(--ink);
  color: var(--paper);
}

.bands-inner {
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: clamp(40px, 5vw, 64px) clamp(20px, 4vw, 56px);
}

.bands-heading {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.bands-heading p {
  margin: 0;
  color: var(--term-amber);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.bands-list {
  display: grid;
  gap: 0;
}

.band {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.band:last-child {
  border-bottom: 0;
}

.band-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.band p {
  margin: 0;
  font-size: clamp(18px, 2vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 400;
}

/* -------------------- Repo section -------------------- */

.repo-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.repo-section .copy-stack p {
  font-size: 17px;
  line-height: 1.55;
}

.command-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--term-line);
  border-radius: 12px;
  background: var(--term-bg);
  color: var(--term-text);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.command-card-chrome {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--term-line);
  background: var(--term-surface);
}

.command-card-chrome .terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.command-card-chrome .terminal-title { color: var(--term-muted); font-size: 12px; margin-left: 6px; }

.command-card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px 22px;
  font-size: 13px;
  line-height: 1.7;
}

.command-card-body .cmd {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.command-card-body .cmd .term-prompt { margin: 0; }
.command-card-body .cmd-text { color: var(--term-text); }
.command-card-body .cmd-comment {
  margin-top: 8px;
  color: var(--term-muted);
}

.command-card-body a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--term-line);
  color: var(--term-green);
  font-size: 13px;
  font-family: inherit;
}

.command-card-body a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* -------------------- Inline code (body copy) -------------------- */

p code,
.copy-stack code,
.staff-meta code,
.feature p code,
.system-item p code {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

/* -------------------- Footer -------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.site-footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 1fr));
  gap: 40px;
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: clamp(48px, 5vw, 72px) clamp(20px, 4vw, 56px) 32px;
}

.site-footer-brand {
  display: grid;
  gap: 14px;
  max-width: 360px;
}

.site-footer-brand .brand {
  font-size: 16px;
}

.site-footer-brand p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.site-footer-col h4 {
  margin: 0 0 14px;
  color: var(--muted-2);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-footer-col ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer-col a {
  color: var(--ink);
  font-size: 14px;
  transition: color 0.15s ease;
}

.site-footer-col a:hover {
  color: var(--accent);
}

.site-footer-base {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: 18px clamp(20px, 4vw, 56px) 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer-base p {
  margin: 0;
}

/* -------------------- Responsive -------------------- */

@media (max-width: 980px) {
  .hero-grid,
  .split-section .section-inner,
  .grid-section .section-inner,
  .repo-section .section-inner {
    grid-template-columns: 1fr;
  }

  .system-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .staff-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .hero-meta {
    flex-wrap: wrap;
    gap: 20px;
  }
}

@media (max-width: 720px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .stage-tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 40px;
  }

  .hero,
  .section,
  .statement {
    padding-left: 18px;
    padding-right: 18px;
  }

  .system-grid,
  .staff-grid {
    grid-template-columns: 1fr;
  }

  .site-footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .band {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 22px 0;
  }

  .site-footer-base {
    flex-direction: column;
    align-items: flex-start;
  }
}