/* ============================================================
   Agent Farm — pure tinted black & white
   No accent color. Geist + JetBrains Mono. Asymmetric layout.
   Real micro-interactions. IntersectionObserver-driven reveals.
   ============================================================ */

:root {
  /* Tinted neutrals — never pure #FFF or #000. */
  --bone:        #FAFAF9;
  --bone-2:      #F2F2EF;
  --bone-3:      #EAEAE6;
  --ink-900:     #0F0F0E;
  --ink-800:     #1A1A18;
  --ink-700:     #2A2A27;
  --ink-600:     #3F3F3B;
  --ink-500:     #5C5C56;
  --ink-400:     #85857F;
  --ink-300:     #B5B5B0;
  --ink-200:     #D6D6D2;
  --line:        #E0E0DC;
  --line-strong: #C8C8C2;
  /* The single semantic color in the entire site. Used for one dot. */
  --pulse:       #0F0F0E;

  --font-sans: 'Geist', 'SF Pro Text', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, monospace;

  --ease-quart: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-expo:  cubic-bezier(0.16, 1, 0.3, 1);

  --measure: 64rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bone:        #0E0E0D;
    --bone-2:      #181816;
    --bone-3:      #232320;
    --ink-900:     #F2F2F0;
    --ink-800:     #E2E2DF;
    --ink-700:     #C8C8C4;
    --ink-600:     #A8A8A2;
    --ink-500:     #85857F;
    --ink-400:     #6E6E68;
    --ink-300:     #4F4F4B;
    --ink-200:     #353532;
    --line:        #25251E;
    --line-strong: #393935;
    --pulse:       #F2F2F0;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bone);
  color: var(--ink-900);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01', 'kern', 'tnum';
  min-height: 100vh;
}

::selection {
  background: rgba(15, 15, 14, 0.18);
  color: var(--ink-900);
}
@media (prefers-color-scheme: dark) {
  ::selection { background: rgba(242, 242, 240, 0.18); }
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 180ms var(--ease-quart);
}
a:hover { color: var(--ink-900); }

em { font-style: italic; }

code {
  font-family: var(--font-mono);
  font-size: 0.84em;
  background: var(--bone-2);
  border: 1px solid var(--line);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--ink-800);
}

/* ── Reveals ─────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: rise 0.7s var(--ease-quart) forwards;
  animation-delay: var(--d, 0ms);
}
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 800ms var(--ease-quart),
    transform 800ms var(--ease-quart);
  will-change: opacity, transform;
}
.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes cur {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-on-scroll { opacity: 1; transform: none; animation: none; transition: none; }
  .cur { animation: none; opacity: 1; }
}

/* ── Top bar ─────────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 40px;
  border-bottom: 1px solid var(--line);
  background: var(--bone);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bone) 80%, transparent);
}
.tb-l { display: flex; align-items: baseline; gap: 14px; }
.brand-name {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
}
.brand-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-400);
}
.tb-r { display: flex; gap: 26px; }
.tb-r a {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-500);
  position: relative;
  padding: 4px 0;
}
.tb-r a::after {
  content: '';
  position: absolute;
  inset: auto 0 -2px 0;
  height: 1px;
  background: var(--ink-900);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 280ms var(--ease-quart);
}
.tb-r a:hover { color: var(--ink-900); }
.tb-r a:hover::after { transform: scaleX(1); }

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 120px 40px 100px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: end;
}

.hero-content { min-width: 0; }

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--ink-500);
  margin-bottom: 32px;
}

.hero-title {
  font-weight: 600;
  font-size: clamp(48px, 7.4vw, 92px);
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--ink-900);
  margin-left: -0.04em;
}
.hl { display: block; }
.hl-mute { color: var(--ink-400); }

.hero-sub {
  margin-top: 32px;
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink-600);
  max-width: 38em;
}
.hero-sub em { color: var(--ink-900); font-style: italic; font-weight: 500; }

.hero-actions {
  margin-top: 38px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px 12px 16px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14.5px;
  border-radius: 6px;
  border: 0;
  cursor: pointer;
  transition:
    transform 200ms var(--ease-quart),
    background 200ms var(--ease-quart);
  white-space: nowrap;
}

.btn-pri {
  background: var(--ink-900);
  color: var(--bone);
}
.btn-pri:hover {
  background: var(--ink-700);
  color: var(--bone);
  transform: translateY(-1px);
}
.btn-pri:active { transform: translateY(0) scale(0.985); }

.apl { width: 16px; height: 16px; fill: currentColor; transform: translateY(1px); }
.apl-lg { width: 36px; height: 36px; fill: currentColor; }

.btn-tail {
  font-family: var(--font-mono);
  font-size: 13px;
  opacity: 0.65;
  transition: transform 280ms var(--ease-quart);
  margin-left: 2px;
}
.btn:hover .btn-tail { transform: translateY(2px); opacity: 1; }

.install-line {
  font-family: var(--font-mono);
  font-size: 13.5px;
  background: transparent;
  border: 1px solid var(--line);
  padding: 11px 14px;
  border-radius: 6px;
  color: var(--ink-700);
  transition: border-color 200ms var(--ease-quart), color 200ms var(--ease-quart);
}
.install-line:hover {
  border-color: var(--ink-700);
  color: var(--ink-900);
}

/* ── Hero rail ───────────────────────────────────────────────── */
.hero-rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 28px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--bone) 50%, var(--bone-2));
  min-width: 220px;
}
.rail-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  position: relative;
}
.rr-n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-400);
  width: 28px;
  font-variant-numeric: tabular-nums;
}
.rr-l {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: lowercase;
  color: var(--ink-700);
}
.rail-row-act .rr-n,
.rail-row-act .rr-l {
  color: var(--ink-900);
  font-weight: 600;
}
.rr-dot {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-900);
  box-shadow: 0 0 0 0 rgba(15, 15, 14, 0.45);
  animation: ringPulse 1.8s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}
@media (prefers-color-scheme: dark) {
  .rr-dot {
    background: var(--ink-900);
    animation-name: ringPulseDark;
  }
}
@keyframes ringPulse {
  0% { box-shadow: 0 0 0 0 rgba(15, 15, 14, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(15, 15, 14, 0); }
  100% { box-shadow: 0 0 0 0 rgba(15, 15, 14, 0); }
}
@keyframes ringPulseDark {
  0% { box-shadow: 0 0 0 0 rgba(242, 242, 240, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(242, 242, 240, 0); }
  100% { box-shadow: 0 0 0 0 rgba(242, 242, 240, 0); }
}

/* ── Terminal section ───────────────────────────────────────── */
.term-section {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 40px 110px;
}
.term-meta {
  display: flex;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-400);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.terminal {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-700);
  background: var(--bone-2);
  border: 1px solid var(--line);
  padding: 26px 30px;
  border-radius: 8px;
  overflow-x: auto;
}
.terminal code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
  white-space: pre;
}
.t-pr { color: var(--ink-900); font-weight: 600; }
.t-cmt { color: var(--ink-400); font-style: italic; }
.t-met { color: var(--ink-400); }
.t-arr { color: var(--ink-900); font-weight: 700; }

.cur {
  display: inline-block;
  width: 0.5em;
  height: 1em;
  background: currentColor;
  vertical-align: -0.13em;
  margin-left: 3px;
  animation: cur 1.05s steps(1, end) infinite;
}

/* ── How it works ───────────────────────────────────────────── */
.how {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 80px 40px 100px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
}
.how-l .kicker { margin-bottom: 18px; }
.how-h {
  font-weight: 600;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--ink-900);
}
.how-list {
  list-style: none;
}
.how-list li {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.how-list li:first-child { border-top: 0; padding-top: 0; }
.step-n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.10em;
  color: var(--ink-400);
  text-transform: uppercase;
  padding-top: 4px;
}
.step-h {
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.012em;
  margin-bottom: 6px;
  color: var(--ink-900);
}
.step-b {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-600);
  max-width: 50ch;
}

/* ── Anti-marketing ─────────────────────────────────────────── */
.anti {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 80px 40px 100px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
}
.anti-l .kicker { margin-bottom: 18px; }
.anti-h {
  font-weight: 600;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--ink-900);
  margin-bottom: 16px;
}
.anti-sub {
  font-size: 15px;
  color: var(--ink-500);
  max-width: 28ch;
  line-height: 1.5;
}
.anti-list {
  list-style: none;
}
.anti-list li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.anti-list li:first-child { border-top: 0; padding-top: 0; }
.ax {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--ink-300);
  font-weight: 400;
  padding-top: 0;
}
.ax-h {
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--ink-900);
  margin-bottom: 4px;
}
.ax-b {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-600);
  max-width: 56ch;
}

/* ── Install ────────────────────────────────────────────────── */
.install {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 80px 40px 110px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
  align-items: start;
}
.ins-l .kicker { margin-bottom: 18px; }
.ins-h {
  font-weight: 600;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--ink-900);
  margin-bottom: 16px;
}
.ins-sub {
  font-size: 15px;
  color: var(--ink-500);
  max-width: 32ch;
  line-height: 1.55;
}
.ins-r {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.ins-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bone);
  transition:
    transform 280ms var(--ease-quart),
    border-color 280ms var(--ease-quart),
    background 280ms var(--ease-quart);
}
.ins-card-link {
  text-decoration: none;
  cursor: pointer;
}
.ins-card-link:hover {
  transform: translateY(-2px);
  border-color: var(--ink-900);
  background: var(--ink-900);
  color: var(--bone);
}
.ins-card-link:hover .ins-tag { color: var(--bone); }
.ins-card-link:hover .ins-tail { color: var(--bone); transform: translateY(2px); }
.ins-card-link:hover .apl-lg { fill: var(--bone); }
.ins-card-link:hover .ins-dl-h { color: var(--bone); }
.ins-card-link:hover .ins-note { color: rgba(250, 250, 249, 0.6); }
.ins-card-link:hover .ins-link { color: var(--bone); }

.ins-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ins-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--ink-500);
  transition: color 280ms var(--ease-quart);
}
.ins-tail {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ink-400);
  transition: transform 280ms var(--ease-quart), color 280ms var(--ease-quart);
}
.ins-code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-700);
  background: var(--bone-2);
  border: 1px solid var(--line);
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
}
.ins-code code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
  white-space: pre;
}
.ins-dl {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
}
.ins-dl-h {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink-900);
  transition: color 280ms var(--ease-quart);
}
.ins-note {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-500);
  transition: color 280ms var(--ease-quart);
}
.ins-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-700);
  border-bottom: 1px solid var(--line);
  transition: color 280ms var(--ease-quart), border-color 280ms var(--ease-quart);
}

/* ── Footer ─────────────────────────────────────────────────── */
.foot {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 32px 40px 40px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 24px;
}
.foot-name {
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 4px;
}
.foot-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-400);
}
.foot-r {
  display: flex;
  gap: 24px;
}
.foot-r a {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-500);
  transition: color 200ms var(--ease-quart);
}
.foot-r a:hover { color: var(--ink-900); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 920px) {
  .topbar { padding: 18px 24px; flex-wrap: wrap; gap: 12px; }
  .tb-r { gap: 18px; }
  .hero { padding: 80px 24px 60px; grid-template-columns: 1fr; gap: 48px; }
  .hero-rail { width: 100%; }
  .term-section { padding: 0 24px 70px; }
  .how, .anti, .install {
    padding: 60px 24px 70px;
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .ins-r { grid-template-columns: 1fr; }
  .foot { padding: 24px 24px 32px; }
}

@media (max-width: 560px) {
  .hero-title { font-size: clamp(40px, 12vw, 60px); }
  .hero-sub { font-size: 17px; }
  .terminal { font-size: 12px; padding: 18px 20px; }
}