:root {
  --bg: #EEF0EA;
  --panel: #FFFFFF;
  --ink: #15201C;
  --muted: #5B6660;
  --line: #D7DACE;
  --accent: #2F6F5E;
  --accent-ink: #FFFFFF;
  --amber: #C98A2B;
  --radius: 6px;
  --max: 920px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
  --bg: #0d1117;
  --panel: #161b22;
  --ink: #f0f6fc;
  --muted: #8b949e;
  --line: #30363d;
  --accent: #2ea043;
  --accent-ink: #ffffff;
  --amber: #d29922;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

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

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav & Theme Toggle */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0 0;
}

.theme-toggle {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

header.hero {
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--amber);
  display: inline-block;
  border-radius: 50%;
}

h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  line-height: 1.1;
}

.thesis {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 28px;
}

.thesis strong {
  color: var(--ink);
  font-weight: 600;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
}

.contact-row a {
  color: var(--ink);
}

.contact-row span.sep {
  margin: 0 12px;
  color: var(--line);
}

section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

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

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 24px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.section-label .n {
  color: var(--amber);
}

.summary p {
  font-size: 1.02rem;
  max-width: 72ch;
  color: var(--ink);
  line-height: 1.7;
}

/* Projects */
.project-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.project {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
  box-shadow: var(--shadow);
}

.project-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.project-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.25rem;
  margin: 0;
}

.project-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 12px;
  background: var(--bg);
}

.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3px 8px;
}

.project ul {
  margin: 0;
  padding-left: 18px;
}

.project li {
  margin-bottom: 8px;
  font-size: 0.97rem;
}

.project li:last-child {
  margin-bottom: 0;
}

/* Pipeline diagram */
.pipeline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 0;
  margin: 18px 0 22px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

.pipeline .step {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 6px 10px;
  color: var(--ink);
  white-space: nowrap;
}

.pipeline .step.hot {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.pipeline .arrow {
  color: var(--muted);
  padding: 0 6px;
  font-size: 14px;
}

/* Experience */
.role {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.role:first-of-type {
  border-top: none;
}

.role-title {
  font-weight: 600;
  font-size: 1.05rem;
}

.role-org {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  color: var(--muted);
  grid-column: 1;
}

.role-dates {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  color: var(--muted);
  grid-column: 2;
  text-align: right;
  white-space: nowrap;
}

.role ul {
  grid-column: 1 / -1;
  margin: 10px 0 0;
  padding-left: 18px;
}

.role li {
  margin-bottom: 6px;
  font-size: 0.95rem;
}

/* Skills */
.skill-group {
  margin-bottom: 20px;
}

.skill-group:last-child {
  margin-bottom: 0;
}

.skill-cat {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

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

.chip {
  font-size: 13px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 5px 12px;
}

/* Education / Certs */
.edu-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.edu-item:first-of-type {
  border-top: none;
}

.edu-degree {
  font-weight: 600;
}

.edu-org {
  font-size: 0.92rem;
  color: var(--muted);
  grid-column: 1;
}

.edu-dates {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  color: var(--muted);
  text-align: right;
}

.certs-line {
  font-size: 0.96rem;
  color: var(--ink);
  line-height: 1.6;
}

.certs-note {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
}

footer {
  padding: 48px 0 60px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--line);
}

@media (max-width: 600px) {
  header.hero {
    padding: 40px 0 32px;
  }
  section {
    padding: 40px 0;
  }
  .role {
    grid-template-columns: 1fr;
  }
  .role-dates {
    grid-column: 1;
    text-align: left;
  }
  .edu-item {
    grid-template-columns: 1fr;
  }
  .edu-dates {
    grid-column: 1;
    text-align: left;
  }
  .project-head {
    flex-direction: column;
    align-items: flex-start;
  }
}