:root {
  --bg: #0b1020;
  --panel: #151d36;
  --text: #e9ecf8;
  --muted: #b4bddb;
  --accent: #80a9ff;
  --accent-strong: #5e8dff;
  --border: #243054;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #1a2650 0%, var(--bg) 50%);
  line-height: 1.65;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #a4c1ff; }

.hero, main { max-width: 1120px; margin: 0 auto; padding: 2rem 1.5rem; }
.hero { padding-bottom: 2rem; }
.nav { display:flex; justify-content:space-between; align-items:center; gap:1rem; flex-wrap:wrap; }
.logo { font-weight: 800; font-size: 1.1rem; color:#fff; }
.nav-links { display:flex; gap:1rem; flex-wrap:wrap; }
.nav-links a { color: var(--muted); font-weight:500; font-size:0.98rem; }


.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-nav-links {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}
.nav-link {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-link.is-active,
.nav-link[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}
.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: rgba(11, 16, 32, 0.7);
  color: var(--text);
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 0.86rem;
}
.site-footer-nav {
  margin-bottom: 0.55rem;
  color: var(--muted);
}
.site-footer-nav p {
  margin: 0;
  font-size: 0.92rem;
}
.site-footer-nav p + p {
  margin-top: 0.28rem;
}
.site-footer-nav a {
  color: var(--muted);
}
.site-footer-nav a:hover {
  color: var(--text);
}

.hero-content { margin-top:2.4rem; max-width: 980px; }
.eyebrow { text-transform: uppercase; letter-spacing:0.08em; color:var(--accent); font-weight:700; font-size:0.8rem; }
h1 { font-size: clamp(2rem, 4.6vw, 3.5rem); line-height:1.1; margin:0.35rem 0 0.8rem; }
.intro { color:var(--muted); font-size:1.08rem; line-height:1.7; margin-bottom:0.35rem; max-width: 880px; }
.memorable-line { margin: 0.15rem 0 0.9rem; color:#e2eaff; font-weight:700; font-size:1.02rem; }

.hero-proof-strip {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.55rem;
  margin: 0.45rem 0 0;
}
.stat-chip {
  border: 1px solid rgba(128, 169, 255, 0.42);
  background: rgba(18, 31, 58, 0.86);
  border-radius: 11px;
  padding: 0.5rem 0.64rem;
  font-size: 0.85rem;
  color: #dbe5ff;
}

.proof-strip { display:flex; flex-wrap:wrap; gap:0.48rem; }
.chip {
  display:inline-flex; align-items:center; border:1px solid rgba(128, 169, 255, 0.35);
  background: rgba(18, 31, 58, 0.8); color:#dce4ff; border-radius:999px;
  padding:0.3rem 0.74rem; font-size:0.81rem; font-weight:600;
}

.impact-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.15rem 0 0.55rem;
}
.impact-header .chip {
  background: rgba(26, 42, 74, 0.88);
  border-color: rgba(128, 169, 255, 0.45);
}

.hero-actions { margin-top:1.1rem; display:flex; gap:0.65rem; flex-wrap:wrap; }
.btn { padding:0.7rem 1.1rem; border-radius:999px; font-weight:600; border:1px solid transparent; }
.btn.primary { background: var(--accent-strong); color:#fff; }
.btn.secondary, .btn.tertiary { border-color:var(--border); color:var(--text); }
.btn.tertiary { color:var(--muted); }

.scan-nav {
  position: sticky; top: 0; z-index: 15; display:flex; gap:0.55rem; flex-wrap:wrap;
  padding:0.7rem; background: rgba(11, 16, 32, 0.93); border:1px solid var(--border);
  border-radius: 12px; margin-bottom:1.3rem;
}
.scan-nav a {
  color: var(--muted); border:1px solid rgba(128,169,255,0.2); border-radius:999px;
  padding:0.24rem 0.66rem; font-size:0.85rem; font-weight:600;
}

.section { margin-bottom: 2.7rem; }
.section h2 { font-size:1.72rem; margin-bottom:0.45rem; }
.section p, .card li { color: var(--muted); }
.section p { font-size:1.01rem; line-height:1.7; }
.section-intro { margin-top:0; margin-bottom:0.95rem; max-width: 820px; }

.signature-impact {
  background: rgba(9, 14, 28, 0.92);
  border: 1px solid rgba(128, 169, 255, 0.42);
  border-radius: 16px;
  padding: 1.1rem;
}
.impact-statements {
  display: grid;
  gap: 0.7rem;
}

.impact-lead { margin: 0 0 0.65rem; color: #d5e1ff; font-weight: 600; }
.impact-statements p {
  margin: 0;
  font-size: 1.12rem;
  color: #d7e2ff;
  border-left: 3px solid rgba(128, 169, 255, 0.7);
  padding-left: 0.75rem;
}
.impact-statements strong {
  color: #ffffff;
  font-size: 1.12em; font-weight: 800;
}

.known-for ul {
  margin: 0;
  padding-left: 1.2rem;
}
.known-for li {
  margin-bottom: 0.35rem;
  color: var(--muted);
}

.failure-thinking ul {
  margin: 0;
  padding-left: 1.2rem;
}
.failure-thinking li {
  margin-bottom: 0.3rem;
  color: var(--muted);
}
.failure-takeaway {
  margin: 0.7rem 0 0;
  color: #d9e5ff;
  font-weight: 600;
}
.related-thinking {
  margin: 0.35rem 0 0.65rem;
  border-left: 3px solid rgba(128, 169, 255, 0.5);
  padding-left: 0.7rem;
  font-size: 0.9rem;
}
.related-thinking span {
  color: #c7d4f6;
}


.related-concepts ul {
  margin: 0.65rem 0 0;
  padding-left: 1.1rem;
}
.related-concepts li {
  margin-bottom: 0.45rem;
  color: var(--muted);
}
.related-concepts a {
  font-weight: 600;
}

.grid, .tech-grid, .timeline, .case-study-list, .signature-grid { display:grid; gap:1rem; }
.card, .project {
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border:1px solid var(--border); border-radius:16px; padding:1.05rem 1.1rem;
}
.card ul { margin: 0.58rem 0 0; padding-left:1.05rem; }
.card li { font-size:0.95rem; line-height:1.62; margin-bottom:0.34rem; }

.signature-strip { border:1px solid rgba(128,169,255,0.23); border-radius:16px; padding:1rem; background:rgba(10,14,28,0.4); }
.signature-item { border:1px solid rgba(128,169,255,0.16); border-radius:12px; padding:0.72rem 0.8rem; background:rgba(11,16,32,0.35); }
.signature-item h3 { margin:0 0 0.2rem; font-size:1rem; }
.signature-item p { margin:0; font-size:0.94rem; }

.featured-section { border: 1px solid rgba(128, 169, 255, 0.24); border-radius: 18px; padding: 1.1rem; background: rgba(10, 14, 28, 0.45); }
.case-study { padding: 1rem; border-color: rgba(36, 48, 84, 0.56); background: rgba(14, 21, 38, 0.42); }
.flagship-artifact {
  border: 1px solid rgba(128, 169, 255, 0.72);
  background: rgba(20, 34, 62, 0.86);
  box-shadow: 0 0 0 1px rgba(128, 169, 255, 0.22), 0 26px 34px -24px rgba(0, 0, 0, 0.78);
  padding: 2.1rem;
  margin-bottom: 1rem;
}
.flagship-callout {
  border: 1px solid rgba(128, 169, 255, 0.7);
  background: rgba(20, 34, 62, 0.82);
  border-radius: 16px;
  padding: 1.2rem;
}
.secondary-case {
  border-color: rgba(36, 48, 84, 0.42);
  background: rgba(14, 21, 38, 0.28);
}

.flagship-label {
  margin: 0 0 0.35rem;
  display: inline-block;
  padding: 0.2rem 0.52rem;
  border-radius: 999px;
  border: 1px solid rgba(128, 169, 255, 0.5);
  color: #dbe6ff;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.project-eyebrow {
  margin: 0 0 0.3rem;
  color: #9bb7ff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.flagship-headline {
  margin: 0;
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
  line-height: 1.28;
}
.flagship-grid {
  margin-top: 0.75rem;
}
.flagship-grid div {
  background: rgba(16, 24, 44, 0.55);
}

.case-header-row { display:flex; align-items:baseline; justify-content:space-between; gap:1rem; }
.case-header-row h3 { font-size: 1.3rem; margin: 0; }
.case-takeaway { margin: 0.45rem 0 0.6rem; color: #d7e2ff; font-weight: 600; }
.case-study:not(.flagship-artifact) .architecture-diagram { opacity: 0.86; }
.case-study:not(.flagship-artifact) .case-takeaway { color: #bdcaea; }
.case-study:not(.flagship-artifact) .chip { opacity: 0.92; }
.anchor-link { color: rgba(128, 169, 255, 0.85); font-weight: 700; }
.architecture-diagram { margin: 0.55rem 0 0.5rem; }
.architecture-diagram svg { width:100%; height:auto; border:1px solid rgba(128, 169, 255, 0.28); border-radius: 14px; background: rgba(8, 12, 26, 0.84); }
.architecture-diagram figcaption { margin-top:0.46rem; font-size:0.9rem; color:var(--muted); }
.why-line { margin:0.35rem 0 0.5rem; font-size:0.94rem; color:#d0dcfb; }

.case-study-grid { display:grid; gap:0.75rem; margin-top:0.65rem; }
.case-study-grid div { border:1px solid rgba(128, 169, 255, 0.18); border-radius:12px; padding:0.7rem 0.78rem; background: rgba(11, 16, 32, 0.36); }
.case-study-grid h4 { margin:0 0 0.22rem; font-size:0.9rem; }
.case-study-grid p { margin:0; font-size:0.94rem; line-height:1.56; }
.case-study-grid ul { margin:0; padding-left:1.05rem; color:var(--muted); }
.case-study-grid li { margin-bottom:0.24rem; font-size:0.92rem; }

.writing-support { border-top:1px dashed rgba(128,169,255,0.34); padding-top:1.35rem; }
.date, .project span { font-size:0.84rem; color:var(--accent); font-weight:600; }

footer { border-top:1px solid var(--border); padding:1.3rem; text-align:center; color:var(--muted); }
section[id] { scroll-margin-top: 4.4rem; }

@media (min-width: 780px) {
  .grid, .tech-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .signature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-study-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .impact-statements { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topic-path-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 779px) { .scan-nav { position: static; }

  .site-nav {
    align-items: flex-start;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
    padding-top: 0.45rem;
  }

  .site-nav-links.is-open {
    display: flex;
  }
 }

.blog-post { max-width: 780px; }
.breadcrumb { margin:0 0 0.65rem; font-size:0.9rem; font-weight:500; line-height:1.35; color:var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--text); }
.blog-post pre { max-width:100%; overflow-x:auto; white-space: pre; }
.blog-post pre code { word-break: normal; }
.blog-post p,
.blog-post li {
  overflow-wrap: break-word;
}
.blog-post a {
  overflow-wrap: anywhere;
}
.blog-post p code, .blog-post li code { overflow-wrap:anywhere; word-break:normal; }
.blog-post .blog-dek { margin:0 0 1.5rem; font-size:1.05rem; line-height:1.7; color:#cbd5e1; }
.article-tags { margin-top: 1rem; }
.article-tags-label {
  margin: 0 0 0.35rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 700;
}
.tag-list,
.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.entry-tags {
  margin-top: 0.7rem;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(128, 169, 255, 0.35);
  border-radius: 999px;
  padding: 0.16rem 0.56rem;
  color: #dbe5ff;
  background: rgba(15, 24, 44, 0.72);
  font-size: 0.78rem;
  font-weight: 600;
}
.tag-chip:hover,
.tag-chip.is-active {
  border-color: rgba(128, 169, 255, 0.65);
  color: #ffffff;
}
.tag-cloud {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.8rem;
}
.tag-cloud-item {
  color: var(--muted);
  font-size: 0.82rem;
}
.is-hidden {
  display: none !important;
}
.related-writing {
  margin-top: 1.3rem;
  border-top: 1px dashed rgba(128, 169, 255, 0.3);
  padding-top: 1rem;
}
.related-writing ul {
  margin: 0.35rem 0 0;
  padding-left: 1.15rem;
}
.topic-path-grid {
  display: grid;
  gap: 0.9rem;
}
.topic-path {
  border: 1px solid rgba(128, 169, 255, 0.2);
  background: rgba(14, 21, 38, 0.36);
  border-radius: 14px;
  padding: 0.85rem 0.95rem;
}
.topic-path h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}
.topic-path p {
  margin: 0 0 0.45rem;
}
.topic-path-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.blog-diagram { margin:1.75rem 0 2rem; }
.blog-diagram img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
}
.blog-diagram figcaption {
  margin-top: 0.75rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: #cbd5e1;
}
.blog-post table { width:100%; border-collapse:collapse; margin:1.5rem 0; }
.blog-post th, .blog-post td {
  border:1px solid rgba(148,163,184,0.3);
  padding: 0.65rem 0.72rem;
  vertical-align: top;
  overflow-wrap: anywhere;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
}
.table-scroll table {
  min-width: 760px;
  margin: 0;
}
.askrich-grid {
  display: grid;
  gap: 1rem;
}

.askrich-shell {
  --ask-surface: #0f1a36;
  --ask-surface-2: #132245;
  --ask-border: #3a4f82;
  --ask-text: #f5f8ff;
  --ask-muted: #d8e2ff;
  --ask-input-bg: #0b1530;
  --ask-user-bg: #14315f;
  --ask-assistant-bg: #1c2c52;
}

.ask-rich-page .breadcrumb,
.ask-rich-page .breadcrumb a {
  color: #d4def8;
}

.ask-rich-page .intro {
  color: #edf2ff;
  font-size: 1.08rem;
}

.askrich-setup p {
  margin-top: 0;
  color: var(--ask-muted);
}

.askrich-shell .card {
  background: var(--ask-surface);
  border: 1px solid var(--ask-border);
}

.askrich-shell h2 {
  color: var(--ask-text);
}

.askrich-prompt-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.prompt-chip {
  border: 1px solid var(--ask-border);
  background: rgba(17, 33, 67, 0.85);
  color: var(--ask-text);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font: 600 0.94rem/1.25 "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.prompt-chip:hover {
  border-color: #8cb4ff;
  background: rgba(30, 55, 106, 0.95);
}

.askrich-settings {
  margin-top: 1rem;
  border-top: 1px solid var(--ask-border);
  padding-top: 0.8rem;
}

.askrich-settings summary {
  cursor: pointer;
  color: var(--ask-muted);
  margin-bottom: 0.65rem;
  font-weight: 600;
}

.askrich-settings label {
  display: block;
  margin: 0.4rem 0;
  color: var(--ask-muted);
  font-size: 0.92rem;
}

.askrich-settings input {
  width: 100%;
  border: 1px solid var(--ask-border);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  background: var(--ask-input-bg);
  color: var(--ask-text);
  font-size: 0.96rem;
}

.askrich-chat-card {
  display: flex;
  flex-direction: column;
}

.askrich-chat-card h2 {
  margin-top: 0;
}

.askrich-messages {
  min-height: 360px;
  max-height: 560px;
  overflow-y: auto;
  background: #0a1228;
  border: 1px solid var(--ask-border);
  border-radius: 12px;
  padding: 0.9rem;
}

.message {
  border: 1px solid var(--ask-border);
  border-radius: 12px;
  padding: 0.72rem 0.82rem;
  margin-bottom: 0.78rem;
}

.message .role {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
  color: #cfddff;
  font-weight: 700;
}

.message .answer {
  color: var(--ask-text);
  font-size: 1rem;
  line-height: 1.6;
  white-space: pre-wrap;
}

.message.user {
  background: var(--ask-user-bg);
}

.message.assistant {
  background: var(--ask-assistant-bg);
}

.message.system {
  background: #232020;
  border-color: #4f2f2f;
}

.citations {
  margin-top: 0.65rem;
}

.citations summary {
  cursor: pointer;
  color: #9fc1ff;
  font-size: 0.9rem;
  font-weight: 600;
}

.citations ol {
  margin: 0.55rem 0 0;
  padding-left: 1.15rem;
}

.citations li {
  color: var(--ask-muted);
  margin-bottom: 0.35rem;
}

.feedback-controls {
  margin-top: 0.65rem;
  padding-top: 0.55rem;
  border-top: 1px dashed var(--ask-border);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.feedback-prompt {
  font-size: 0.82rem;
  color: var(--ask-muted);
}

.feedback-btn {
  border: 1px solid var(--ask-border);
  border-radius: 8px;
  background: #0f1b39;
  color: var(--ask-text);
  font-size: 0.82rem;
  padding: 0.24rem 0.54rem;
  cursor: pointer;
}

.feedback-btn.selected {
  background: #0369a1;
  border-color: #0369a1;
  color: #ffffff;
}

.feedback-btn.selected.unhelpful {
  background: #b91c1c;
  border-color: #b91c1c;
}

.feedback-status {
  font-size: 0.8rem;
  color: var(--ask-muted);
}

.askrich-form {
  margin-top: 0.85rem;
}

.askrich-form textarea {
  width: 100%;
  border: 1px solid var(--ask-border);
  border-radius: 12px;
  padding: 0.82rem 0.88rem;
  background: var(--ask-input-bg);
  color: var(--ask-text);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.98rem;
  line-height: 1.5;
  resize: vertical;
}

.askrich-form textarea::placeholder {
  color: #b8c8ef;
}

.askrich-form textarea:focus,
.askrich-settings input:focus,
.prompt-chip:focus-visible {
  outline: 2px solid #8cb4ff;
  outline-offset: 2px;
}
.askrich-form button {
  margin-top: 0.7rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (min-width: 920px) {
  .askrich-grid {
    grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.6fr);
    align-items: start;
  }
}