/* Atlas landing — cartographic instrument aesthetic */

:root {
  --ink: #14201a;
  --ink-soft: #2a3d33;
  --paper: #d7e4d8;
  --paper-deep: #c5d6c8;
  --mist: #eaf2eb;
  --signal: #0f766e;
  --signal-bright: #14b8a6;
  --ember: #b45309;
  --line: rgba(20, 32, 26, 0.14);
  --shadow: rgba(20, 32, 26, 0.12);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --display: "Bricolage Grotesque", system-ui, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --radius: 2px;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(20, 184, 166, 0.12), transparent 55%),
    radial-gradient(900px 500px at -10% 30%, rgba(180, 83, 9, 0.06), transparent 50%),
    linear-gradient(180deg, var(--mist) 0%, var(--paper) 40%, var(--paper-deep) 100%);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

a {
  color: inherit;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem clamp(1.25rem, 4vw, 3rem);
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--mist) 78%, transparent);
  border-bottom: 1px solid var(--line);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.mark {
  width: 0.85rem;
  height: 0.85rem;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px var(--paper), 0 0 0 1px var(--signal);
  background: radial-gradient(circle at 40% 40%, var(--signal-bright), var(--signal));
}

.nav-links {
  display: none;
  gap: 1.5rem;
  font-family: var(--display);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-links a {
  text-decoration: none;
  opacity: 0.72;
  transition: opacity 160ms ease;
}

.nav-links a:hover {
  opacity: 1;
}

.nav-cta {
  font-family: var(--display);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.55rem 0.95rem;
  background: var(--ink);
  color: var(--mist);
  border-radius: var(--radius);
}

@media (min-width: 820px) {
  .nav-links {
    display: flex;
  }
}

/* Hero */
.hero {
  position: relative;
  min-height: min(100vh, 920px);
  display: grid;
  align-items: end;
  padding: clamp(3rem, 8vh, 6rem) clamp(1.25rem, 4vw, 3rem) clamp(3.5rem, 9vh, 6.5rem);
  overflow: hidden;
  isolation: isolate;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.topo {
  width: 100%;
  height: 100%;
  display: block;
}

.topo-lines path,
.topo-lines ellipse {
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: draw-line 2.8s ease forwards;
}

.topo-lines path:nth-child(2),
.topo-lines ellipse:nth-child(10) { animation-delay: 0.12s; }
.topo-lines path:nth-child(3),
.topo-lines ellipse:nth-child(11) { animation-delay: 0.22s; }
.topo-lines path:nth-child(4) { animation-delay: 0.32s; }
.topo-lines path:nth-child(5) { animation-delay: 0.18s; }
.topo-lines path:nth-child(6) { animation-delay: 0.28s; }
.topo-lines path:nth-child(7) { animation-delay: 0.38s; }
.topo-lines path:nth-child(8) { animation-delay: 0.45s; }

@keyframes draw-line {
  to { stroke-dashoffset: 0; }
}

.hero-orb {
  position: absolute;
  right: 8%;
  top: 18%;
  width: min(38vw, 420px);
  height: min(38vw, 420px);
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.55), transparent 35%),
    radial-gradient(circle at 50% 50%, rgba(20, 184, 166, 0.28), transparent 68%);
  filter: blur(2px);
  animation: drift 12s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-18px, 22px) scale(1.05); }
}

.hero-copy {
  max-width: 820px;
}

.hero-brand {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-size: clamp(3.8rem, 12vw, 8.5rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.9;
  color: var(--ink);
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-title {
  margin: 0 0 1.25rem;
  max-width: 16ch;
  font-family: var(--display);
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.12;
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.12s both;
}

.hero-lede {
  margin: 0 0 2rem;
  max-width: 38ch;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--ink-soft);
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.22s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.32s both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: var(--mist);
}

.btn-primary:hover {
  background: var(--signal);
}

.btn-ghost {
  border-color: color-mix(in srgb, var(--ink) 35%, transparent);
  background: color-mix(in srgb, var(--mist) 55%, transparent);
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--mist);
}

/* Sections */
.section {
  padding: clamp(4.5rem, 10vh, 7.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-inner.narrow {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
}

.section h2 {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.section-sub,
.lead {
  margin: 0 0 2.5rem;
  max-width: 42ch;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.lead em {
  font-style: italic;
  color: var(--ink);
}

/* Philosophy pillars — not cards; open list with rules */
.pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.pillars li {
  display: grid;
  gap: 0.35rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 720px) {
  .pillars li {
    grid-template-columns: 11rem 1fr;
    align-items: baseline;
    gap: 2rem;
  }
}

.pillars strong {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.pillars span {
  color: var(--ink-soft);
}

/* Problem compare */
.compare {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 860px) {
  .compare {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .compare article {
    padding: 0 1.5rem;
    border-left: 1px solid var(--line);
  }

  .compare article:first-child {
    padding-left: 0;
    border-left: none;
  }
}

.compare h3 {
  margin: 0 0 0.65rem;
  font-family: var(--display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.compare p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.compare-win h3 {
  color: var(--signal);
}

.compare-win {
  position: relative;
}

.compare-win::before {
  content: "";
  position: absolute;
  inset: -1rem -1rem -1rem -1.25rem;
  background: color-mix(in srgb, var(--signal-bright) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--signal) 25%, transparent);
  border-radius: var(--radius);
  z-index: -1;
}

/* Capabilities — open index layout, not card stack */
.cap-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.cap {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.75rem 1.25rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
  transition: background 200ms ease;
}

.cap:hover {
  background: color-mix(in srgb, var(--mist) 55%, transparent);
}

.cap-index {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--signal);
  padding-top: 0.35rem;
}

.cap h3 {
  margin: 0;
  grid-column: 2;
  font-family: var(--display);
  font-size: 1.25rem;
  letter-spacing: -0.025em;
}

.cap p {
  margin: 0;
  grid-column: 2;
  color: var(--ink-soft);
}

@media (min-width: 860px) {
  .cap-grid {
    grid-template-columns: 1fr 1fr;
    column-gap: 3rem;
  }
}

/* Providers */
.provider-split {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .provider-split {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.provider header {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.65rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--signal);
}

.live-dot::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--signal-bright);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--signal-bright) 25%, transparent);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--signal-bright) 0%, transparent); }
}

.provider h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.75rem;
  letter-spacing: -0.03em;
}

.provider ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.provider li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.provider li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.45rem;
  height: 1px;
  background: var(--signal);
}

/* Agent terminal */
.terminal {
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--ink) 55%, transparent);
  border-radius: 6px;
  background: #101814;
  color: #d7e8dc;
  box-shadow:
    0 24px 60px var(--shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  background: #18241e;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-bar span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #3d5247;
}

.terminal-bar span:nth-child(1) { background: #b45309; }
.terminal-bar span:nth-child(2) { background: #ca8a04; }
.terminal-bar span:nth-child(3) { background: #0f766e; }

.terminal-bar code {
  margin-left: auto;
  font-size: 0.72rem;
  opacity: 0.55;
}

.terminal-body {
  margin: 0;
  padding: 1.35rem 1.25rem 1.6rem;
  font-family: var(--mono);
  font-size: clamp(0.78rem, 1.6vw, 0.9rem);
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
}

.terminal-body .cmt { color: #6f8a7b; }
.terminal-body .prompt { color: var(--signal-bright); }
.terminal-body .ok { color: #5eead4; }

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 0;
}

.steps li {
  counter-increment: step;
  display: grid;
  gap: 0.35rem;
  padding: 1.4rem 0 1.4rem 3.25rem;
  border-top: 1px solid var(--line);
  position: relative;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.55rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--signal);
}

.steps strong {
  font-family: var(--display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.steps span {
  color: var(--ink-soft);
}

/* Roadmap */
.roadmap-track {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 900px) {
  .roadmap-track {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }
}

.roadmap-track article {
  padding-top: 1rem;
  border-top: 2px solid var(--ink);
}

.roadmap-track .phase {
  display: block;
  margin-bottom: 0.65rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.roadmap-track h3 {
  margin: 0 0 0.55rem;
  font-family: var(--display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.roadmap-track p {
  margin: 0 0 1rem;
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--line);
}

.badge.done {
  color: var(--signal);
  border-color: color-mix(in srgb, var(--signal) 40%, transparent);
  background: color-mix(in srgb, var(--signal-bright) 12%, transparent);
}

.badge.next {
  color: var(--ember);
  border-color: color-mix(in srgb, var(--ember) 40%, transparent);
}

.coming-chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.coming-chips li {
  font-family: var(--display);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.45rem 0.75rem;
  border: 1px dashed color-mix(in srgb, var(--ink) 30%, transparent);
  color: var(--ink-soft);
}

/* Start */
.start {
  background:
    linear-gradient(180deg, transparent, color-mix(in srgb, var(--signal) 8%, transparent));
}

.install {
  margin: 0 0 1.75rem;
  padding: 1.25rem 1.35rem;
  background: #101814;
  color: #d7e8dc;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.7;
  overflow-x: auto;
}

.footnote {
  margin: 2rem 0 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

/* Footer */
.footer {
  padding: 3rem clamp(1.25rem, 4vw, 3rem) 4rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
}

.footer-tag {
  margin: 0 0 1.25rem;
  max-width: 36ch;
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0 0 1.25rem;
  font-family: var(--display);
  font-size: 0.88rem;
  font-weight: 500;
}

.footer-links a {
  text-decoration: none;
  opacity: 0.72;
  transition: opacity 160ms ease;
}

.footer-links a:hover {
  opacity: 1;
}

.footer-meta {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: color-mix(in srgb, var(--ink-soft) 80%, transparent);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}