/* ─── Overrides ─────────────────────────────────────────── */
/* This page uses color:inherit for links, no underlines on hover */
a { color: inherit; }
a:hover { text-decoration: none; }

/* Override shared pill badge — hero eyebrow is plain monospace text here */
.hero-eyebrow {
  display: flex;
  background: none;
  border: none;
  padding: 0;
}

/* ─── Nav ───────────────────────────────────────────────── */
/* Full override: this page has logo, links, hamburger, drawer */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 clamp(16px, 5vw, 80px);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
  font-weight: 500;
}

.nav-links a:hover { color: var(--text); }

/* Active nav link — underline in accent color */
.nav-links a.active {
  color: var(--accent);
  position: relative;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  background: var(--accent);
  opacity: 0.7;
}

/* Contact pill */
.nav-contact {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--bg) !important;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.nav-contact:hover { background: var(--accent-dim); }

/* When contact section is active: outline style, matching other active links */
.nav-contact.active {
  background: transparent;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
}

.nav-contact.active::after { display: none; }

/* Hamburger button — hidden on desktop */
.nav-hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all 0.25s;
  transform-origin: center;
}

/* Animate to X when open */
.nav-hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--bg-drawer);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  z-index: 99;
}

.nav-drawer.open { display: block; }

.nav-drawer ul {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.nav-drawer a {
  display: block;
  padding: 16px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-drawer a:hover { color: var(--text); }

.nav-drawer a.active { color: var(--accent); }

.nav-drawer .nav-contact {
  margin: 8px 24px;
}

/* ─── Hero ──────────────────────────────────────────────── */
#hero {
  padding: 96px 0 80px;
  position: relative;
  overflow: hidden;
}

/* Ambient glow only — hex pattern is handled by inline SVG */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 60% at 78% 40%, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-hex-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  animation: fadeUp 0.5s ease both;
}

.hero-name-row {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 16px;
}

.hero-name-row h1 { margin-bottom: 0; }

/* Photo */
.avatar {
  flex-shrink: 0;
  width: 136px;
  height: 136px;
  border-radius: 50%;
  border: 2px solid var(--accent-a35);
  box-shadow: 0 0 0 6px var(--accent-a06);
  overflow: hidden;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-placeholder {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
}

.hero-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--accent);
  opacity: 0.7;
  margin-bottom: 8px;
}

h1 {
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

h1 span { color: var(--accent); }

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  color: var(--text-muted);
  margin-bottom: 24px;
  max-width: 520px;
  line-height: 1.75;
}

/* Social links */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  animation: fadeUp 0.5s ease both;
  animation-delay: 0.08s;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-muted);
  transition: all 0.2s;
  cursor: pointer;
}

.social-btn:hover {
  border-color: var(--accent);
  color: var(--text);
  background: var(--accent-glow);
}

.social-btn--cta {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 600;
}

.social-btn--cta:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  color: var(--bg);
}

.social-btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* ─── Impact figures (replaces stats-bar card) ─────────── */
/* Loose number row — no card border, not a dashboard panel */
.impact-row {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  flex-wrap: wrap;
  animation: fadeUp 0.55s ease both;
  animation-delay: 0.15s;
}

.impact-item {
  display: flex;
  flex-direction: column-reverse; /* dt first in DOM, dd (number) first visually */
  gap: 4px;
}

.impact-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.impact-num .impact-plus { color: var(--accent); }

.impact-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ─── About ─────────────────────────────────────────────── */
#about { background: var(--surface); }

.about-text {
  font-size: 1.125rem;
  color: var(--text);
  line-height: 1.85;
  max-width: 660px;
}

.about-text strong { color: var(--text); font-weight: 600; }

.about-sharing {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.about-sharing-statement {
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.about-sharing-statement em {
  color: var(--accent);
  font-style: normal;
}

.about-sharing-detail {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 620px;
}

.about-sharing-detail strong { color: var(--text); font-weight: 600; }

/* ─── Skills ────────────────────────────────────────────── */
.expertise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.domain-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s, background 0.2s;
}

.domain-card:hover { border-color: var(--accent); background: var(--card-hover); }

.domain-card--lead {
  grid-column: 1 / -1;
  border-color: var(--accent);
}

.domain-category {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted); /* default: gray for flanking cards */
  margin-bottom: 8px;
}

/* same accent as "Kübler" in the hero/nav */
.domain-card--lead .domain-category { color: var(--accent); }

.domain-card--sci .domain-category { color: var(--text-muted); }
.domain-card--eng .domain-category { color: var(--text-muted); }

.domain-title {
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 8px;
}

.domain-stance {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.55;
  margin-bottom: 16px;
}

.domain-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.domain-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 500;
}

.domain-card--lead .domain-tag {
  background: var(--surface);
  border-color: var(--border);
}

/* Lead card: two-panel layout when spanning full width */
@media (min-width: 640px) {
  .domain-card--lead {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 32px;
    padding: 32px;
  }

  .domain-card--lead .domain-category { grid-column: 1; grid-row: 1; }

  .domain-card--lead .domain-title {
    grid-column: 1;
    grid-row: 2;
    font-size: 1.25rem;
  }

  .domain-card--lead .domain-stance {
    grid-column: 1;
    grid-row: 3;
    margin-bottom: 0;
  }

  .domain-card--lead .domain-tags {
    grid-column: 2;
    grid-row: 1 / 4;
    align-self: center;
  }
}

/* Expertise grid: single column on narrow viewports */
@media (max-width: 600px) {
  .expertise-grid { grid-template-columns: 1fr; }
}

/* ─── Experience ────────────────────────────────────────── */
#experience { background: var(--bg); }

/* Inline accent links within timeline bullets (e.g. open-source project links) */
.timeline-link { color: var(--accent); }

/* ─── Community ─────────────────────────────────────────── */
#community { background: var(--surface); }

.timeline-group-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding: 32px 0 16px;
}

.timeline-group-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Remove top padding when the group label directly follows the section title */
.section-title + .timeline-group-label {
  padding-top: 0;
}

.timeline { display: flex; flex-direction: column; gap: 0; }

.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.timeline-item:last-child { border-bottom: none; }

.timeline-meta {
  padding-top: 2px;
}

.timeline-period {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.timeline-company {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.timeline-type {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 4px 8px;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.timeline-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 65ch;
}

.timeline-bullets li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
  line-height: 1.55;
}

.timeline-bullets li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.timeline-bullets strong { color: var(--text); font-weight: 600; }

.timeline-subrole {
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.timeline-subrole:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
}

.timeline-subperiod {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-faint);
  margin-bottom: 0;
}

.timeline-subrole-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.timeline-subrole-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.timeline-focus-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

/* ─── Open Source (within Experience) ──────────────────── */
.os-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 8px 0;
}

.os-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.os-project {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.os-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

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

/* ─── Writing ───────────────────────────────────────────── */
#writing { background: var(--bg); }

.writing-header,
.pub-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.writing-header .section-title,
.pub-header .section-title { margin-bottom: 0; }

.writing-cta,
.scholar-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  align-self: flex-end;
  white-space: nowrap;
  transition: color 0.15s;
}

.writing-cta:hover,
.scholar-link:hover { color: var(--accent); text-decoration: none; }

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.article-card-link {
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.article-views {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 500;
}

.article-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  min-height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: border-color 0.2s, color 0.2s;
}

.pub-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ─── Article cards: editorial layout ──────────────────── */
/* Two featured articles at top, remaining four as a list */
.articles-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.article-featured {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s, background 0.2s;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.article-featured:hover {
  border-color: var(--accent);
  background: var(--card-hover);
}

.article-featured-title {
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.articles-list {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.article-row {
  display: grid;
  grid-template-columns: 52px 1fr 20px;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  min-height: 44px;
  border-bottom: 1px solid var(--border);
  color: inherit;
  text-decoration: none;
  transition: background 0.15s;
  position: relative;
}

.article-row:last-child { border-bottom: none; }
.article-row:hover { background: var(--accent-glow); }

.article-row-views {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 500;
  text-align: right;
}

.article-row-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
}

.article-row-arrow {
  color: var(--text-faint);
  opacity: 0;
  transition: opacity 0.15s;
}

.article-row:hover .article-row-arrow { opacity: 1; }

@media (max-width: 640px) {
  .articles-featured { grid-template-columns: 1fr; }
}

@media (max-width: 400px) {
  .article-row { grid-template-columns: 44px 1fr; }
  .article-row-arrow { display: none; }
}

/* ─── Section intro (used in Projects) ─────────────────── */
.section-intro {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  max-width: 65ch;
}

/* ─── Projects ──────────────────────────────────────────── */
#projects { background: var(--bg); }

.project-launch {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
}

/* Featured project — full-width, two-panel layout */
.project-featured {
  background: var(--card);
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: background 0.2s;
}

.project-featured:hover { background: var(--card-hover); }

.project-featured-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.project-featured-title {
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 12px;
}

.project-featured-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 60ch;
  margin-bottom: 20px;
}

@media (min-width: 640px) {
  .project-featured {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: 32px;
    align-items: start;
  }
}

/* ─── Skills ────────────────────────────────────────────── */
#skills { background: var(--surface); }

/* ─── Publications ──────────────────────────────────────── */
#publications { background: var(--bg); }

#publications .section-intro {
  font-size: 1rem;
  color: var(--text);
}

#publications .timeline {
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ─── Education ─────────────────────────────────────────── */
#education { background: var(--surface); }

/* ─── Volunteer ─────────────────────────────────────────── */

.awards-row {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.awards-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

/* ─── Contact ──────────────────────────────────────────── */
#contact { background: var(--surface); }

.contact-inner {
  max-width: 560px;
}

.contact-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

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

/* ─── Responsive ────────────────────────────────────────── */

/* Nav collapses to hamburger — 7 links + contact need room */
@media (max-width: 1023px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

@media (max-width: 640px) {
  .eyebrow-sep { display: none; }
  .eyebrow-item { display: block; }
  .hero-name-row { gap: 16px; }
  .avatar { width: 90px; height: 90px; }
  .social-links { justify-content: center; }
  .social-btn { padding: 6px 12px; font-size: 0.8125rem; gap: 6px; }
  .social-btn svg { width: 13px; height: 13px; }
  .impact-row { gap: 24px; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .timeline-meta { display: flex; gap: 16px; align-items: baseline; }
}

/* ─── Scroll entrance animations ───────────────────────── */
.scroll-animate {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  will-change: opacity, transform;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
  will-change: auto; /* free compositor layer once animation completes */
}

/* Focus styles — on-theme, visible for keyboard nav */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .hero-inner,
  .social-links,
  .impact-row,
  .scroll-animate {
    animation: none;
    transition: none;
    opacity: 1;
    transform: none;
  }
}