/* ==========================================================================
   Tokens
   ========================================================================== */

:root {
  --bg: #12161c;
  --surface: #171c23;
  --border: #2a323c;
  --border-soft: #1f252d;
  --text: #e7eaee;
  --text-muted: #8b95a1;
  --text-faint: #5b6472;
  --accent: #4fd7c4;
  --accent-dim: #2f5f59;
  --signal: #e0a53d;

  --font-sans: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --measure: 720px;
  --gutter: 24px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f7;
    --surface: #ffffff;
    --border: #dadfe4;
    --border-soft: #e7eaed;
    --text: #1a1f26;
    --text-muted: #565f6b;
    --text-faint: #8a93a0;
    --accent: #0f8f7c;
    --accent-dim: #cfeee8;
    --signal: #b3760f;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
}

a:hover,
a:focus-visible {
  border-bottom-color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  padding: 40px 0 0;
  border-bottom: 1px solid var(--border-soft);
}

.site-header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 28px;
  flex-wrap: wrap;
}

.identity-mark {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.identity-mark strong {
  color: var(--text);
  font-weight: 500;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  font-family: var(--font-mono);
  font-size: 14px;
}

@media (max-width: 480px) {
  .site-nav {
    gap: 10px 14px;
    font-size: 13px;
  }
}

.site-nav a {
  color: var(--text-muted);
  border-bottom: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: 72px 0 56px;
}

.hero h1 {
  font-size: clamp(34px, 5vw, 50px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

.hero .role {
  font-size: clamp(18px, 2.4vw, 22px);
  color: var(--text-muted);
  font-weight: 400;
  margin: 0 0 28px;
}

.hero .thesis {
  font-size: 19px;
  max-width: 58ch;
  color: var(--text);
  margin: 0 0 36px;
}

.hero .thesis em {
  font-style: normal;
  color: var(--accent);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.btn {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0c1a18;
  font-weight: 500;
}

.btn.primary:hover,
.btn.primary:focus-visible {
  background: transparent;
  color: var(--accent);
}

/* stat strip */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}

.stat {
  padding: 20px 18px 20px 0;
  border-left: 1px solid var(--border-soft);
}

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

.stat .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  color: var(--accent);
  font-weight: 500;
}

.stat .label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.35;
}

@media (max-width: 640px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat:nth-child(2) {
    border-left: 1px solid var(--border-soft);
    padding-left: 18px;
  }
  .stat:nth-child(3) {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border-soft);
    padding-top: 20px;
  }
  .stat:nth-child(4) {
    border-top: 1px solid var(--border-soft);
    padding-top: 20px;
  }
}

/* ==========================================================================
   Section shell
   ========================================================================== */

section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-soft);
}

section:last-of-type {
  border-bottom: none;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 0;
}

.section-head .tag {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-faint);
}

/* ==========================================================================
   Consulting
   ========================================================================== */

.lede {
  font-size: 17px;
  max-width: 62ch;
  color: var(--text-muted);
  margin: 0 0 36px;
}

.consult-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  margin-bottom: 36px;
}

.consult-item {
  background: var(--bg);
  padding: 22px 24px;
}

.consult-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 8px;
}

.consult-item p {
  font-size: 14.5px;
  color: var(--text-muted);
  margin: 0;
}

@media (max-width: 600px) {
  .consult-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Experience timeline
   ========================================================================== */

.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--accent) 0%,
    var(--border) 14%,
    var(--border) 100%
  );
}

.role-entry {
  position: relative;
  padding-bottom: 44px;
}

.role-entry:last-child {
  padding-bottom: 0;
}

.role-entry::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--accent);
}

.role-entry.current::before {
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.role-entry .when {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-faint);
  display: block;
  margin-bottom: 6px;
}

.role-entry h3 {
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 2px;
}

.role-entry .company {
  font-size: 15px;
  color: var(--text-muted);
  margin: 0 0 14px;
}

.role-entry ul {
  margin: 0 0 16px;
  padding-left: 18px;
}

.role-entry li {
  margin-bottom: 7px;
  color: var(--text);
}

.role-entry li::marker {
  color: var(--text-faint);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags span {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 3px 8px;
}

.earlier-career {
  margin-top: 8px;
  padding-top: 8px;
  color: var(--text-muted);
  font-size: 15px;
}

.earlier-career strong {
  color: var(--text);
  font-weight: 500;
}

/* ==========================================================================
   Skills
   ========================================================================== */

.skill-groups {
  display: grid;
  gap: 28px;
}

.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 12px;
}

.skill-group .tags span {
  font-size: 13px;
}

/* ==========================================================================
   Credentials (certs / education / languages)
   ========================================================================== */

.credentials-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

@media (max-width: 600px) {
  .credentials-grid {
    grid-template-columns: 1fr;
  }
}

.credentials-grid h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 12px;
}

.credentials-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.credentials-grid li {
  padding: 9px 0;
  border-top: 1px solid var(--border-soft);
  font-size: 15px;
}

.credentials-grid li:first-child {
  border-top: none;
}

.credentials-grid .meta {
  display: block;
  color: var(--text-faint);
  font-size: 13px;
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-block {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 28px;
}

.contact-block p {
  max-width: 46ch;
  color: var(--text-muted);
  margin: 0 0 24px;
}

.contact-links {
  display: grid;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
}

.contact-links a {
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.contact-links a:hover,
.contact-links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
  padding: 28px 0 48px;
}

footer .wrap {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}