:root {
  --ia-bg: #0c100d;
  --ia-card: #151c16;
  --ia-line: #2f4030;
  --ia-amber: #e8a33d;
  --ia-green: #83c98a;
  --ia-text: #e8e6e0;
  --ia-dim: #96a38f;
  --ia-mono: ui-monospace, monospace;
  --ia-sans: system-ui, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ia-bg);
  color: var(--ia-text);
  font-family: var(--ia-sans);
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 28px;
}

.crumb {
  padding-top: 22px;
  font: 13px var(--ia-mono);
  color: #647263;
}
.crumb a:hover { color: var(--ia-amber); }

/* Hero */
.ia-hero {
  padding: 54px 0 62px;
  border-bottom: 1px solid var(--ia-line);
  background:
    radial-gradient(circle at 78% 20%, rgba(232, 163, 61, 0.12), transparent 33%),
    linear-gradient(145deg, #101710, #0c100d);
}
.ia-kicker,
.section-kicker,
.track-tag,
.project-type,
.prompt-label,
.content-tag,
.ex-label {
  font: 12px var(--ia-mono);
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--ia-amber);
}
.pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--ia-green);
  box-shadow: 0 0 0 5px rgba(131, 201, 138, 0.1);
}

h1, h2, h3 { line-height: 1.2; }
h1 {
  font-size: clamp(36px, 7vw, 76px);
  letter-spacing: -0.04em;
  margin: 22px 0 18px;
  max-width: 820px;
}
h1 span { color: var(--ia-amber); }
h2 {
  font-size: clamp(26px, 4vw, 38px);
  margin: 12px 0;
}
.sub-heading {
  font-size: 18px;
  margin: 36px 0 16px;
  color: var(--ia-text);
  font-weight: 600;
}
.ia-lede {
  max-width: 720px;
  color: var(--ia-dim);
  font-size: 18px;
}
.ia-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 28px 0 40px;
}
.btn {
  display: inline-block;
  border-radius: 8px;
  padding: 12px 20px;
  font-weight: 600;
}
.btn.primary {
  background: var(--ia-amber);
  color: #10130f;
}
.btn.ghost {
  border: 1px solid var(--ia-line);
  color: var(--ia-text);
}
.btn.ghost:hover {
  border-color: var(--ia-amber);
  color: var(--ia-amber);
}
.ia-stats {
  display: flex;
  gap: 42px;
  flex-wrap: wrap;
}
.ia-stats div {
  display: flex;
  flex-direction: column;
}
.ia-stats strong {
  font: 24px var(--ia-mono);
  color: var(--ia-amber);
}
.ia-stats span {
  font: 12px var(--ia-mono);
  color: var(--ia-dim);
}

section { padding: 72px 0; }
.section-alt {
  background: #101610;
  border-top: 1px solid #1d2a1e;
  border-bottom: 1px solid #1d2a1e;
}
.section-intro {
  max-width: 720px;
  color: var(--ia-dim);
  margin: 0 0 28px;
}

/* Tools */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.tool-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.tool-card {
  background: var(--ia-card);
  border: 1px solid var(--ia-line);
  border-radius: 14px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s, transform 0.2s;
}
.tool-card:hover {
  border-color: var(--ia-amber);
  transform: translateY(-2px);
}
.tool-card.featured-tool {
  border-color: rgba(232, 163, 61, 0.55);
  background: linear-gradient(135deg, rgba(232, 163, 61, 0.08), var(--ia-card));
}
.tool-icon {
  font: 600 13px var(--ia-mono);
  color: var(--ia-amber);
  letter-spacing: 0.06em;
}
.tool-card h3 {
  font-size: 18px;
  margin: 0;
}
.tool-card p {
  color: var(--ia-dim);
  font-size: 14px;
  margin: 0;
  flex: 1;
}
.tool-example {
  background: #0b0f0c;
  border: 1px solid var(--ia-line);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 4px 0;
}
.tool-example .ex-label {
  display: block;
  margin-bottom: 6px;
}
.tool-example code {
  font: 12px/1.5 var(--ia-mono);
  color: var(--ia-green);
  white-space: pre-wrap;
}
.tool-card .copy-prompt {
  align-self: flex-start;
  margin-top: 4px;
}
.tool-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--ia-amber);
  font: 12px var(--ia-mono);
}
.tool-link:hover { text-decoration: underline; }

/* Tracks */
.track-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.track-card {
  position: relative;
  background: var(--ia-card);
  border: 1px solid var(--ia-line);
  border-radius: 14px;
  padding: 24px;
  min-height: 260px;
  transition: transform 0.2s, border-color 0.2s;
}
.track-card:hover {
  transform: translateY(-3px);
  border-color: var(--ia-amber);
}
.track-card.featured-track {
  border-color: rgba(232, 163, 61, 0.65);
  background: linear-gradient(135deg, rgba(232, 163, 61, 0.1), var(--ia-card));
}
.track-number {
  position: absolute;
  right: 22px;
  top: 20px;
  font: 28px var(--ia-mono);
  color: #435543;
}
.track-card h3 {
  font-size: 23px;
  margin: 12px 0;
}
.track-card p,
.project-grid p {
  color: var(--ia-dim);
}
.track-card > a {
  display: inline-block;
  margin-top: 18px;
  color: var(--ia-amber);
  font: 12px var(--ia-mono);
}
.chips {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}
.chips span {
  border: 1px solid var(--ia-line);
  border-radius: 999px;
  padding: 4px 9px;
  color: var(--ia-dim);
  font: 11px var(--ia-mono);
}

/* Content cards */
.content-block { margin-bottom: 8px; }
.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.content-block .content-grid:has(.content-card:nth-child(2):last-child) {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.content-card {
  background: var(--ia-card);
  border: 1px solid var(--ia-line);
  border-radius: 12px;
  padding: 20px;
  transition: border-color 0.2s;
}
.content-card:hover { border-color: var(--ia-amber); }
.content-card h3 {
  font-size: 17px;
  margin: 8px 0 10px;
}
.content-card p {
  color: var(--ia-dim);
  font-size: 14px;
  margin: 0 0 12px;
}
.content-list {
  margin: 0;
  padding-left: 18px;
  color: var(--ia-dim);
  font-size: 13px;
}
.content-list li { margin-bottom: 4px; }

/* Prompts */
.prompt-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.prompt-card {
  background: #0b0f0c;
  border: 1px solid var(--ia-line);
  border-radius: 12px;
  padding: 18px;
}
.prompt-card pre {
  white-space: pre-wrap;
  min-height: 130px;
  margin: 12px 0;
  background: transparent;
  color: var(--ia-green);
  font: 12px/1.6 var(--ia-mono);
}
.copy-prompt {
  border: 1px solid var(--ia-line);
  background: transparent;
  color: var(--ia-amber);
  border-radius: 6px;
  padding: 8px 11px;
  cursor: pointer;
  font: 11px var(--ia-mono);
}
.copy-prompt:hover {
  background: rgba(232, 163, 61, 0.1);
}

/* Projects */
.project-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.project-grid article {
  border-top: 2px solid var(--ia-line);
  padding: 18px 4px;
}
.project-grid h3 {
  font-size: 19px;
  margin: 10px 0;
}
.project-grid strong {
  font: 11px var(--ia-mono);
  color: var(--ia-amber);
}
.project-grid article:hover { border-color: var(--ia-amber); }

/* Architecture */
.architecture {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 12px;
  align-items: stretch;
  margin: 28px 0;
}
.arch-step {
  background: var(--ia-card);
  border: 1px solid var(--ia-line);
  border-radius: 10px;
  padding: 16px;
}
.arch-step b {
  font: 12px var(--ia-mono);
  color: var(--ia-amber);
}
.arch-step span {
  display: block;
  margin: 9px 0;
  font-weight: 600;
}
.arch-step p {
  font-size: 13px;
  color: var(--ia-dim);
  margin: 0;
}
.arch-arrow {
  align-self: center;
  color: var(--ia-amber);
  font: 20px var(--ia-mono);
}
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.principles div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-left: 2px solid var(--ia-amber);
  padding-left: 12px;
}
.principles b {
  font: 12px var(--ia-mono);
  color: var(--ia-amber);
}
.principles span {
  color: var(--ia-dim);
  font-size: 13px;
}

/* Roadmap */
.roadmap-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.roadmap-list { border-left: 1px solid var(--ia-line); }
.roadmap-list div {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  padding: 0 0 20px 20px;
  position: relative;
}
.roadmap-list div:before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ia-amber);
}
.roadmap-list span {
  font: 11px var(--ia-mono);
  color: var(--ia-amber);
}
.roadmap-list p {
  margin: 0;
  color: var(--ia-dim);
}

footer {
  border-top: 1px solid var(--ia-line);
  padding: 36px 0;
  color: #667364;
  font: 13px var(--ia-mono);
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
footer a { color: var(--ia-dim); }
footer a:hover { color: var(--ia-amber); }

/* Responsive */
@media (max-width: 900px) {
  .tool-grid,
  .tool-grid-2,
  .content-grid,
  .prompt-grid {
    grid-template-columns: 1fr 1fr;
  }
  .project-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .wrap {
    padding-left: 16px;
    padding-right: 16px;
  }
  .ia-hero { padding-top: 38px; }
  .ia-lede { font-size: 16px; }
  .track-grid,
  .tool-grid,
  .tool-grid-2,
  .prompt-grid,
  .project-grid,
  .content-grid,
  .roadmap-wrap {
    grid-template-columns: 1fr;
  }
  .architecture {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .arch-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }
  .principles { grid-template-columns: 1fr; }
  .ia-stats { gap: 22px; }
  .project-grid article { min-height: 0; }
}

.content-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ia-amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}
.content-link:hover {
  border-bottom-color: var(--ia-amber);
}
.content-soon {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-faint);
  border: 1px solid var(--border);
  padding: 2px 8px;
}