@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&family=DM+Mono:wght@300;400&display=swap');

:root {
  --bg: #0e0e0f;
  --bg2: #161618;
  --bg3: #1e1e21;
  --border: #2a2a2e;
  --border2: #333338;
  --text: #f0f0f2;
  --text2: #9898a8;
  --text3: #5a5a6a;
  --accent: #e8e0cc;
  --accent2: #c8bfa8;
  --green: #4ade80;
  --green-bg: rgba(74,222,128,.08);
  --green-border: rgba(74,222,128,.2);
  --amber: #fbbf24;
  --amber-bg: rgba(251,191,36,.08);
  --red: #f87171;
  --red-bg: rgba(248,113,113,.08);
  --blue: #60a5fa;
  --blue-bg: rgba(96,165,250,.08);
  --blue-border: rgba(96,165,250,.2);
  --radius: 8px;
  --radius-sm: 5px;
  --font: 'DM Sans', sans-serif;
  --mono: 'DM Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* Layout */
.container { max-width: 700px; margin: 0 auto; padding: 0 24px; }

/* Nav */
nav {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: rgba(14,14,15,.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}
.nav-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -.01em;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: 13px;
  color: var(--text3);
  text-decoration: none;
  transition: color .15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }

/* Hero */
.hero { padding: 80px 0 60px; }
.hero-label {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 20px;
  font-family: var(--mono);
}
.hero h1 {
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent2);
  font-weight: 300;
}
.hero-sub {
  font-size: 16px;
  color: var(--text2);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 32px;
  font-weight: 300;
}
.cta-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 400;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all .15s;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent2); border-color: var(--accent2); }
.btn-secondary {
  background: transparent;
  color: var(--text2);
  border-color: var(--border2);
}
.btn-secondary:hover { color: var(--text); border-color: var(--text3); }

/* Divider */
hr { border: none; border-top: 1px solid var(--border); margin: 48px 0; }

/* Section label */
.section-label {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 20px;
  font-family: var(--mono);
}

/* Domain grid */
.domain-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-bottom: 48px; }
.domain-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: border-color .15s;
}
.domain-card:hover { border-color: var(--border2); }
.domain-card h3 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.domain-card p { font-size: 12px; color: var(--text3); line-height: 1.6; }

/* Case study list */
.cs-list { margin-bottom: 48px; }
.cs-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: all .15s;
}
.cs-item:first-child { border-top: 1px solid var(--border); }
.cs-item:hover .cs-title { color: var(--accent); }
.cs-item:hover .cs-arrow { opacity: 1; transform: translateX(3px); }
.cs-type {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text3);
  font-family: var(--mono);
  margin-bottom: 5px;
}
.cs-title {
  font-size: 15px;
  font-weight: 400;
  color: var(--text2);
  margin-bottom: 8px;
  line-height: 1.45;
  transition: color .15s;
}
.cs-metrics { display: flex; gap: 14px; flex-wrap: wrap; }
.cs-metric { font-size: 12px; color: var(--text3); }
.cs-metric span { color: var(--green); font-weight: 500; }
.cs-arrow {
  font-size: 16px;
  color: var(--text3);
  opacity: 0;
  transition: all .15s;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Stats */
.stats-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; margin-bottom: 48px; }
.stat { padding: 16px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); }
.stat-val { font-size: 22px; font-weight: 300; color: var(--text); margin-bottom: 4px; letter-spacing: -.02em; }
.stat-lbl { font-size: 11px; color: var(--text3); line-height: 1.4; }

/* Contact block */
.contact-block {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.contact-block h3 { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 4px; }
.contact-block p { font-size: 13px; color: var(--text3); }
.contact-links { display: flex; gap: 8px; flex-wrap: wrap; }

/* Page header */
.page-header { padding: 60px 0 40px; }
.page-header h1 { font-size: clamp(24px, 4vw, 32px); font-weight: 300; color: var(--text); letter-spacing: -.02em; margin-bottom: 12px; }
.page-header p { font-size: 15px; color: var(--text2); line-height: 1.75; max-width: 500px; font-weight: 300; }

/* Case study page */
.cs-page { padding: 60px 0; }
.cs-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg3);
  color: var(--text3);
  font-family: var(--mono);
  margin-bottom: 20px;
}
.cs-page h1 { font-size: clamp(22px, 4vw, 28px); font-weight: 300; color: var(--text); line-height: 1.3; letter-spacing: -.02em; margin-bottom: 12px; }
.cs-page .subtitle { font-size: 15px; color: var(--text2); line-height: 1.75; margin-bottom: 32px; font-weight: 300; }

/* Metrics */
.metrics { display: grid; gap: 10px; margin-bottom: 32px; }
.metrics-3 { grid-template-columns: repeat(3,1fr); }
.metrics-4 { grid-template-columns: repeat(4,1fr); }
.metric { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.metric-val { font-size: 22px; font-weight: 300; color: var(--text); margin-bottom: 4px; letter-spacing: -.02em; }
.metric-val .up { font-size: 12px; color: var(--green); font-weight: 400; margin-left: 4px; }
.metric-val .dn { font-size: 12px; color: var(--amber); font-weight: 400; margin-left: 4px; }
.metric-lbl { font-size: 11px; color: var(--text3); line-height: 1.4; }

/* Pills */
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 32px; }
.pill {
  font-size: 11px;
  color: var(--text3);
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 100px;
  font-family: var(--mono);
}

/* Body copy */
.body-text h2 { font-size: 17px; font-weight: 500; color: var(--text); margin-bottom: 10px; margin-top: 32px; }
.body-text h2:first-child { margin-top: 0; }
.body-text p { font-size: 14px; color: var(--text2); line-height: 1.8; margin-bottom: 14px; font-weight: 300; }
.body-text p:last-child { margin-bottom: 0; }
.body-text .hl { color: var(--text); font-weight: 500; }

/* Callout */
.callout {
  border-left: 2px solid var(--border2);
  padding: 12px 16px;
  margin: 20px 0;
  background: var(--bg2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.callout p { font-size: 13px; color: var(--text2); margin: 0; font-style: italic; }
.callout.info { border-left-color: var(--blue); background: var(--blue-bg); }
.callout.info p { color: var(--blue); }
.callout.success { border-left-color: var(--green); background: var(--green-bg); }
.callout.success p { color: var(--green); }
.callout.warn { border-left-color: var(--amber); background: var(--amber-bg); }
.callout.warn p { color: var(--amber); }

/* Before/after */
.ba-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 20px 0; }
.ba-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.ba-label { font-size: 10px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 10px; font-family: var(--mono); }
.ba-card.before .ba-label { color: var(--red); }
.ba-card.after .ba-label { color: var(--green); }
.ba-card ul { list-style: none; }
.ba-card ul li { font-size: 12px; color: var(--text2); padding: 4px 0; display: flex; gap: 8px; align-items: flex-start; line-height: 1.5; }
.ba-card ul li::before { content: ''; display: block; width: 4px; height: 4px; border-radius: 50%; margin-top: 7px; flex-shrink: 0; }
.before ul li::before { background: var(--red); }
.after ul li::before { background: var(--green); }

/* Two col cards */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 20px 0; }
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.card-label { font-size: 10px; font-weight: 400; letter-spacing: .1em; text-transform: uppercase; color: var(--text3); font-family: var(--mono); margin-bottom: 6px; }
.card h3 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.card p { font-size: 12px; color: var(--text3); line-height: 1.6; margin: 0; }

/* Phase / step list */
.step-list { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 20px 0; }
.step-item { display: flex; gap: 14px; padding: 16px; border-bottom: 1px solid var(--border); align-items: flex-start; }
.step-item:last-child { border-bottom: none; }
.step-num { width: 22px; height: 22px; border-radius: 50%; background: var(--bg3); border: 1px solid var(--border2); display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 500; color: var(--text3); flex-shrink: 0; font-family: var(--mono); }
.step-content h3 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 3px; }
.step-content p { font-size: 12px; color: var(--text3); line-height: 1.6; margin: 0; }

/* Alert list */
.alert-list { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 20px 0; }
.alert-item { display: flex; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--border); align-items: flex-start; }
.alert-item:last-child { border-bottom: none; }
.alert-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; margin-top: 5px; }
.alert-dot.red { background: var(--red); }
.alert-dot.amber { background: var(--amber); }
.alert-dot.blue { background: var(--blue); }
.alert-content strong { font-size: 13px; font-weight: 500; color: var(--text); display: block; margin-bottom: 2px; }
.alert-content p { font-size: 12px; color: var(--text3); line-height: 1.5; margin: 0; }

/* Table */
.data-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 13px; }
.data-table th { text-align: left; font-size: 10px; font-weight: 400; letter-spacing: .08em; text-transform: uppercase; color: var(--text3); font-family: var(--mono); padding: 10px 12px; border-bottom: 1px solid var(--border); }
.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); color: var(--text2); vertical-align: top; font-size: 12px; }
.data-table td:first-child { color: var(--text); font-weight: 500; }
.data-table td.neg { color: var(--red); }
.data-table td.pos { color: var(--green); font-weight: 500; }
.data-table tr:last-child td { border-bottom: none; }

/* Example blocks */
.example-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 20px 0; }
.example { border-radius: var(--radius); padding: 14px 16px; }
.example.bad { background: var(--red-bg); border: 1px solid rgba(248,113,113,.15); }
.example.good { background: var(--green-bg); border: 1px solid var(--green-border); }
.example-label { font-size: 10px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 6px; font-family: var(--mono); }
.example.bad .example-label { color: var(--red); }
.example.good .example-label { color: var(--green); }
.example-text { font-size: 12px; line-height: 1.6; font-family: var(--mono); }
.example.bad .example-text { color: var(--red); }
.example.good .example-text { color: var(--green); }

/* Tier list */
.tier-list { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 20px 0; }
.tier-item { display: flex; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--border); align-items: flex-start; }
.tier-item:last-child { border-bottom: none; }
.tier-badge { font-size: 10px; font-weight: 500; padding: 3px 8px; border-radius: 100px; flex-shrink: 0; margin-top: 2px; font-family: var(--mono); letter-spacing: .04em; }
.tier-badge.star { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-border); }
.tier-badge.mid { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue-border); }
.tier-badge.low { background: var(--amber-bg); color: var(--amber); border: 1px solid rgba(251,191,36,.2); }
.tier-badge.drain { background: var(--red-bg); color: var(--red); border: 1px solid rgba(248,113,113,.2); }
.tier-content h3 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 2px; }
.tier-content p { font-size: 12px; color: var(--text3); line-height: 1.5; margin: 0; }

/* Source grid */
.source-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin: 20px 0; }

/* About page */
.about-intro p { font-size: 15px; color: var(--text2); line-height: 1.85; margin-bottom: 16px; font-weight: 300; }
.domain-pills { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0; }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }

/* Principles */
.principle { display: flex; gap: 20px; padding: 28px 0; border-bottom: 1px solid var(--border); }
.principle:first-of-type { border-top: 1px solid var(--border); }
.principle-num { font-size: 11px; color: var(--text3); font-family: var(--mono); width: 20px; flex-shrink: 0; padding-top: 2px; }
.principle-body h3 { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 8px; }
.principle-body p { font-size: 14px; color: var(--text2); line-height: 1.8; margin-bottom: 8px; font-weight: 300; }
.principle-body p:last-child { margin-bottom: 0; }
.principle-body em { font-style: italic; color: var(--text3); font-size: 13px; }

/* Writing page */
.post-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 10px;
  text-decoration: none;
  transition: border-color .15s, background .15s;
}
.post-card:hover { border-color: var(--border2); background: var(--bg2); }
.post-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.post-source { font-size: 10px; font-weight: 400; letter-spacing: .1em; text-transform: uppercase; color: var(--text3); font-family: var(--mono); }
.post-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--border2); }
.post-type { font-size: 11px; color: var(--text3); }
.post-title { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 8px; line-height: 1.4; }
.post-excerpt { font-size: 13px; color: var(--text2); line-height: 1.7; margin-bottom: 12px; font-weight: 300; }
.post-connection { font-size: 11px; color: var(--text3); display: flex; align-items: flex-start; gap: 6px; padding: 8px 10px; background: var(--bg3); border-radius: var(--radius-sm); margin-bottom: 12px; line-height: 1.5; }
.post-cta { font-size: 12px; color: var(--blue); }
.guide-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; background: var(--bg2); }
.guide-badge { display: inline-flex; align-items: center; gap: 5px; font-size: 10px; font-weight: 400; letter-spacing: .1em; text-transform: uppercase; color: var(--amber); background: var(--amber-bg); padding: 3px 8px; border-radius: 100px; margin-bottom: 12px; font-family: var(--mono); }
.guide-title { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 8px; line-height: 1.4; }
.guide-desc { font-size: 13px; color: var(--text2); line-height: 1.7; margin-bottom: 14px; font-weight: 300; }
.guide-topics { display: flex; flex-wrap: wrap; gap: 6px; }
.guide-topic { font-size: 11px; color: var(--text3); background: var(--bg3); padding: 3px 8px; border-radius: 100px; font-family: var(--mono); }

/* Personal rows */
.personal-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.personal-item:first-of-type { border-top: 1px solid var(--border); }
.personal-icon { font-size: 18px; flex-shrink: 0; width: 28px; text-align: center; margin-top: 2px; }
.personal-body h3 { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 3px; }
.personal-body p { font-size: 13px; color: var(--text3); line-height: 1.6; margin: 0; }

/* Guide page */
.guide-principle { padding: 32px 0; border-bottom: 1px solid var(--border); }
.guide-principle:first-of-type { border-top: 1px solid var(--border); }
.guide-principle-header { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 16px; }
.guide-principle-num { font-size: 11px; color: var(--text3); font-family: var(--mono); width: 20px; flex-shrink: 0; padding-top: 3px; }
.guide-principle-title { font-size: 18px; font-weight: 500; color: var(--text); line-height: 1.3; letter-spacing: -.01em; }
.guide-principle-body { padding-left: 36px; }
.guide-principle-body p { font-size: 14px; color: var(--text2); line-height: 1.8; margin-bottom: 14px; font-weight: 300; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 32px 0; margin-top: 80px; }
.footer-inner { max-width: 700px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.footer-name { font-size: 13px; color: var(--text3); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 12px; color: var(--text3); text-decoration: none; transition: color .15s; }
.footer-links a:hover { color: var(--text); }

/* Responsive */
@media (max-width: 600px) {
  .domain-grid, .stats-row, .metrics-4 { grid-template-columns: repeat(2,1fr); }
  .metrics-3 { grid-template-columns: repeat(2,1fr); }
  .ba-grid, .two-col, .source-grid, .example-grid, .info-grid { grid-template-columns: 1fr; }
  .contact-block { flex-direction: column; align-items: flex-start; }
  .hero h1 { font-size: 26px; }
}