/* ----- base ----- */

html {
  --paper: #f5f1e8;
  --paper-2: #ebe5d4;
  --ink: #1a1d24;
  --ink-2: #3a3f4a;
  --ink-3: #6b7280;
  --blue: #3771c8;
  --terra: #d30001; /* #b85540; */

  --paper-fixed: #f5f1e8;
  --paper-2-fixed: #ebe5d4;
  --ink-fixed: #1a1d24;
  --ink-2-fixed: #3a3f4a;
  --ink-3-fixed: #6b7280;
  --blue-fixed: #3771c8;
  --terra-fixed: #d30001;

  --cmd: #0d0e12;
  --rule: rgba(26, 29, 36, 0.14);
}
/* ----- dark mode ----- */
@media (prefers-color-scheme: dark) {
  html:not(.cs-light) {
    --paper: #1c1d20;
    --paper-2: #25272d;
    --ink: #f0ece0;
    --ink-2: #c5c1b6;
    --ink-3: #8a8780;
    --rule: rgba(240, 236, 224, 0.14);
    --blue: #6ba3f0;
    --terra: #ff5a5c;
    .axiom:hover { background: rgba(107, 163, 240, 0.06); }
  }
}
html.cs-dark {
  --paper: #1c1d20;
  --paper-2: #25272d;
  --ink: #f0ece0;
  --ink-2: #c5c1b6;
  --ink-3: #8a8780;
  --rule: rgba(240, 236, 224, 0.14);
  --blue: #6ba3f0;
  --terra: #ff5a5c;

  .axiom:hover { background: rgba(107, 163, 240, 0.06); }
}


.page-index {

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-family);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }

/* ----- utilities ----- */
.mono { font-family: var(--font-family-mono); }
.narr {
  font-style: italic;
  color: var(--ink-2);
}

/* ----- shared ----- */
.nav-inner,
.hero,
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-title em,
.axiom-title em {
  font-style: normal;
  color: var(--blue);
}
.axiom-body code,
.scaffolds-copy code {
  font-family: var(--font-family-mono);
  background: var(--paper-2);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 13.5px;
}
.batteries,
.claude {
  background: var(--paper-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

/* ----- nav ----- */
.nav {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 50;
}
.nav-inner {
  display: flex;
  justify-content: center;
  padding: 28px 40px;
}
.nav-links {
  display: flex;
  gap: 48px;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  font-weight: 500;
  font-size: 22px;
  color: var(--ink-2);
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--blue); }

.section {
  padding: 60px 40px;
}
.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-bottom: 60px;
  align-items: end;
}
.section-title {
  font-size: clamp(48px, 5vw, 70px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 20px 0 0;
}
.section-sub {
  font-size: 20px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 540px;
  margin: 0;
}

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

.hero {
  text-align: center;
}
.hero-version {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  margin-top: 56px;
}
.hero-version span {
  display: inline-block;
  padding: 4px 24px;
  border-radius: 24px;
  background: var(--ink-2);
  color: var(--paper);
}
.hero-title {
  font-family: var(--font-family);
  font-size: clamp(60px, 8vw, 100px);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
  margin: 20px 0 36px;
  color: var(--ink);
  display: inline-block;
  position: relative;
  white-space: nowrap;
}
.hero-title svg {
  width: clamp(60px, 8vw, 100px);
}
.hero-title .dot {
  display: inline-block;
  width: 0.16em;
  height: 0.16em;
  border-radius: 100px;
  background: var(--terra);
  margin-left: 0.04em;
  vertical-align: 0.04em;
}
.dek {
  font-family: var(--font-family);
  margin: 0 auto 48px;
  text-wrap: pretty;
  max-width: 840px;
  line-height: 1.4;
  font-size: clamp(30px, 3vw, 40px);
  color: var(--ink-2);
}
.dek em {
  font-style: italic;
  color: var(--ink);
  font-weight: 500;
}

/* ----- install ----- */
.install {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}
.install-cmd {
  display: inline-flex;
  flex-direction: row;
  width: auto;
  align-items: center;
  gap: 14px;
  background: var(--cmd);
  color: var(--paper-fixed);
  padding: 18px 80px 18px 24px;
  border-radius: 8px;
  font-family: var(--font-family-mono);
  font-size: 20px;
}
.install-cmd code {
  background: transparent;
}
.install-cmd .prompt {
  color: var(--blue-fixed);
  user-select: none;
}
.install-cmd .copy-btn {
  background: transparent;
  border: 0;
  color: var(--paper-fixed);
  opacity: 0.6;
  cursor: pointer;
  padding: 4px;
  margin-left: 8px;
  transition: opacity 0.15s;
}
.install-cmd .copy-btn:hover { opacity: 1; }
.install-note {
    font-size: 16px;
    color: var(--ink-3-fixed);
    max-width: 300px;
    line-height: 1.3;
}
.install-note .mono {
  color: var(--ink-2);
}

/* ----- cta ----- */

.cta.section {
  padding-top: 0;
  margin-bottom: 20px;
}
.cta .section-inner {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ----- axioms ----- */
.axioms-head {
  grid-template-columns: 1fr 1.4fr;
}
.axiom-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--rule);
}
.axiom {
  padding: 28px 24px 26px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  transition: background 0.2s;
}

@media (max-width: 900px) {
  .axiom-grid { grid-template-columns: 1fr; }
  .axiom { border-right: 0; }
}

.axiom:hover { background: rgba(55, 113, 200, 0.04); }
.axiom:nth-child(2n) { border-right: 0; }
.axiom-num {
  font-family: var(--font-family-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-3);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}
.axiom-title {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 20px;
  color: var(--ink);
}
.axiom-body {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0;
}

/* ----- batteries ----- */
.battery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (max-width: 900px) {
  .battery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .battery-grid {
    grid-template-columns: repeat(1, 1fr);
  }
}

.battery {
  background: var(--paper-2);
  padding: 28px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background 0.15s;
}
.battery:hover { background: var(--paper); }
.battery-icon {
  width: 28px;
  height: 28px;
  color: var(--blue);
}
.battery-name {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.battery-desc {
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0;
}
.battery-pkg {
  font-family: var(--font-family-mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-top: auto;
  padding-top: 8px;
}

/* ----- scaffolds ----- */
.scaffolds-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.scaffolds-copy .section-title { margin-bottom: 28px; }
.scaffolds-copy p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0 0 20px;
}

/* ----- claude callout ----- */
.claude-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.claude-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: 24px;
}
.claude-tag::before {
  content: "▶";
  font-size: 9px;
}
.claude-h {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 28px;
}
.claude-p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0 0 28px;
}
.cmd {
  background: var(--cmd);
  color: var(--paper-fixed);
  padding: 0 24px;
  border-radius: 8px;
  font-family: var(--font-family-mono);
  font-size: 15px;
  line-height: 1.7;
  white-space: pre;
  font-weight: 500;
  overflow-x: auto;
}
@media (max-width: 600px) {
  .cmd {
    padding: 0;
  }
}
.cmd .c { color: var(--ink-3-fixed); }
.cmd .p { color: var(--blue-fixed); }
.cmd .a { color: #ebc587; }
.cmd .h { color: #aeff93; }
.cmd .s { color: #f7ff82; }

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

@media (max-width: 900px) {
  .nav-links { gap: 24px; }
  .section {
    padding: 40px 24px;
  }
  .section-head,
  .axioms-head,
  .scaffolds-inner,
  .claude-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .axiom-grid { grid-template-columns: 1fr; }
  .axiom { border-right: 0; }
}

}