/* style.css — dataguru components */

/* Layout container */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-8));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: var(--text-base);
}
.brand svg {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}
.brand-name {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0;
}
.brand-name .accent {
  color: var(--color-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-links {
  display: none;
  gap: var(--space-1);
  list-style: none;
}
@media (min-width: 720px) {
  .nav-links {
    display: flex;
  }
}
.nav-links a {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.controls {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid transparent;
}
.icon-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}

.lang-toggle {
  width: auto;
  padding: 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.lang-toggle .lang-sep {
  margin-inline: 4px;
  color: var(--color-text-faint);
}
.lang-toggle .lang-active {
  color: var(--color-primary);
}

/* Sections */
main {
  display: block;
}
section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
section + section {
  border-top: 1px solid var(--color-divider);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-primary);
}

/* Hero */
.hero {
  position: relative;
  padding-top: clamp(var(--space-10), 6vw, var(--space-16));
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-20));
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: center;
}
@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

.hero h1 {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-top: var(--space-4);
  max-width: 18ch;
}
.hero h1 .accent {
  color: var(--color-primary);
}
.hero h1 .underline {
  position: relative;
  white-space: nowrap;
}
.hero h1 .underline::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.05em;
  height: 0.18em;
  background: var(--color-primary-highlight);
  z-index: -1;
}
.hero p.lead {
  margin-top: var(--space-5);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
}
.hero .cta-row {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  line-height: 1;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
[data-theme='dark'] .btn-primary {
  color: #0a0d14;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-text-faint);
}
.btn svg {
  width: 14px;
  height: 14px;
}

/* Hero meta strip */
.hero-meta {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-divider);
}
.meta-item .meta-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.meta-item .meta-value {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}

/* Inspection visual */
.inspection {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.inspection-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  z-index: 4;
}
.inspection-header .live {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.inspection-header .live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-anomaly);
  box-shadow: 0 0 0 0 var(--color-anomaly);
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 color-mix(in oklab, var(--color-anomaly) 70%, transparent);
  }
  70% {
    box-shadow: 0 0 0 8px transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

.inspection-canvas {
  position: absolute;
  inset: 36px 0 28px 0;
  width: 100%;
  height: calc(100% - 64px);
}
.inspection-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--color-divider);
  background: var(--color-surface-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  justify-content: space-between;
  z-index: 4;
}
.inspection-footer .score {
  color: var(--color-anomaly);
  font-weight: 600;
}

/* Section common */
.section-head {
  max-width: 720px;
  margin-bottom: clamp(var(--space-8), 5vw, var(--space-16));
}
.section-head h2 {
  font-size: var(--text-xl);
  margin-top: var(--space-3);
  letter-spacing: -0.02em;
}
.section-head p {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
}
@media (min-width: 880px) {
  .about-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}
.about-sidebar {
  position: relative;
}
.about-card {
  position: sticky;
  top: calc(var(--space-16) + var(--space-2));
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.about-card .role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.about-card h3 {
  margin-top: var(--space-2);
  font-size: var(--text-lg);
  font-weight: 600;
}
.about-card .stats {
  margin-top: var(--space-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4) var(--space-6);
}
.about-card .stat-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.about-card .stat-value {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}

.about-body p {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.about-body p.muted {
  color: var(--color-text-muted);
}
.skills-list {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  list-style: none;
  border-top: 1px solid var(--color-divider);
}
.skills-list li {
  display: grid;
  grid-template-columns: minmax(120px, 200px) 1fr;
  gap: var(--space-6);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.skills-list .skill-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding-top: 2px;
}
.skills-list .skill-desc {
  font-size: var(--text-sm);
  color: var(--color-text);
  max-width: none;
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 720px) {
  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    border-color var(--transition-interactive),
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.project-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.project-card.featured {
  grid-column: 1 / -1;
}
@media (min-width: 720px) {
  .project-card.featured {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    display: grid;
  }
}
.project-visual {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-divider);
  overflow: hidden;
}
.project-card.featured .project-visual {
  aspect-ratio: auto;
  border-bottom: none;
  border-right: 1px solid var(--color-divider);
  min-height: 320px;
}
@media (max-width: 719px) {
  .project-card.featured .project-visual {
    border-right: none;
    border-bottom: 1px solid var(--color-divider);
    aspect-ratio: 16 / 10;
    min-height: 0;
  }
}
.project-visual svg {
  width: 100%;
  height: 100%;
  display: block;
}
.project-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}
.project-meta .tag {
  padding: 2px var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}
.project-card h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-1);
}
.project-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.project-section {
  margin-top: var(--space-2);
}
.project-section .label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  display: block;
  margin-bottom: 2px;
}
.project-section .value {
  font-size: var(--text-sm);
  color: var(--color-text);
}
.project-metrics {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: var(--space-4);
}
.metric .metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}
.metric .metric-label {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
  background: var(--color-surface);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media (min-width: 720px) {
  .footer-grid {
    grid-template-columns: 1fr auto auto;
    align-items: start;
  }
}
.footer-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-nav a:hover {
  color: var(--color-primary);
}
.footer-social {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-social > a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-social > a:hover {
  color: var(--color-primary);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  justify-content: space-between;
  align-items: flex-start;
}
@media (min-width: 720px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
  }
}
.footer-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.footer-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
}

/* Mobile-only nav: collapse projects link */
@media (max-width: 540px) {
  .hero-meta {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===== Multi-Page Navigation ===== */
.nav-links a[aria-current='page'] {
  color: var(--color-primary);
  background: var(--color-surface-offset);
}

/* ===== Page Header (sub-pages) ===== */
.page-hero {
  padding-top: clamp(var(--space-8), 4vw, var(--space-12));
  padding-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}
.page-hero .section-head {
  margin-bottom: 0;
}

/* ===== Filter Tabs ===== */
.filter-bar {
  margin-bottom: clamp(var(--space-6), 3vw, var(--space-10));
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: transparent;
  text-transform: uppercase;
}
.filter-btn:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
  background: var(--color-surface-offset);
}
.filter-btn[aria-pressed='true'] {
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border-color: var(--color-primary);
}
[data-theme='dark'] .filter-btn[aria-pressed='true'] {
  color: #0a0d14;
}

/* filter animation */
.project-card[data-hidden] {
  display: none !important;
}

/* ===== Skills Strip ===== */
.skills-strip {
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
  border-top: 1px solid var(--color-divider);
}
.skills-strip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-6);
  text-align: center;
}
.skill-block .skill-icon {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  color: var(--color-primary);
}
.skill-block h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.skill-block p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  max-width: none;
}

/* ===== CTA Banner ===== */
.cta-banner {
  text-align: center;
  padding-block: var(--space-8);
}

/* ===== Profile Section (about.html) ===== */
.profile-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
}
@media (min-width: 720px) {
  .profile-section {
    grid-template-columns: 280px 1fr;
  }
}

.profile-card {
  position: sticky;
  top: calc(var(--space-16) + var(--space-2));
  text-align: center;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.profile-photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  margin-inline: auto;
  border: 3px solid var(--color-border);
  margin-bottom: var(--space-4);
}
.profile-card h1 {
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}
.profile-card .role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: var(--space-1);
}
.profile-card .location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}
.profile-links {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.profile-links a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.profile-links a:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--color-divider);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) + 7px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  border: 2px solid var(--color-bg);
}
.timeline-item.current::before {
  background: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-highlight);
}
.timeline-item .time-period {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.timeline-item h3 {
  font-size: var(--text-base);
  margin-top: var(--space-1);
}
.timeline-item .time-org {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: 2px;
}
.timeline-item .time-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}
.timeline-item .time-desc li {
  max-width: none;
}

/* ===== About Body Sections ===== */
.about-section {
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}
.about-section h2 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

/* Education grid */
.edu-grid {
  display: grid;
  gap: var(--space-4);
}
.edu-item {
  display: grid;
  grid-template-columns: minmax(100px, 180px) 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.edu-item:last-child {
  border-bottom: none;
}
.edu-item .edu-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
  padding-top: 3px;
}
.edu-item h3 {
  font-size: var(--text-sm);
  font-weight: 600;
}
.edu-item .edu-school {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.edu-item .edu-detail {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

/* Skills grid (about page) */
.about-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}
.about-skill-card {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.about-skill-card h3 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.about-skill-card p {
  font-size: var(--text-sm);
  color: var(--color-text);
  max-width: none;
}

/* ===== Project card compact variant ===== */
.project-card.compact .project-visual {
  aspect-ratio: 3 / 1;
  min-height: 0;
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.project-card.compact .project-visual svg {
  width: 100%;
  height: 100%;
}
.project-card.compact {
  display: flex;
  flex-direction: column;
}

/* ===== Clickable project cards ===== */
.project-card[data-modal] {
  cursor: pointer;
}

/* ===== Project Detail Modal ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: color-mix(in oklab, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 250ms ease;
}
.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}
.modal-panel {
  position: fixed;
  inset: var(--space-6);
  z-index: 201;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 250ms ease, transform 250ms ease;
}
@media (min-width: 720px) {
  .modal-panel {
    inset: var(--space-8) auto var(--space-8) auto;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    width: min(900px, calc(100vw - var(--space-12)));
  }
  .modal-panel.open {
    transform: translateX(-50%) translateY(0);
  }
}
.modal-panel.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.modal-close {
  position: sticky;
  top: 0;
  float: right;
  margin: var(--space-4);
  z-index: 5;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}
.modal-close:hover {
  color: var(--color-text);
  background: var(--color-surface-offset-2);
}
.modal-body {
  padding: var(--space-6) var(--space-8) var(--space-8);
}
.modal-body h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}
.modal-body .modal-subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-5);
}
.modal-body .modal-desc {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}
.modal-body .modal-desc p + p {
  margin-top: var(--space-3);
}
.modal-metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  margin-bottom: var(--space-6);
}
.modal-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.modal-gallery img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.modal-gallery figcaption {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
  max-width: none;
}
.modal-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.modal-tech .tag {
  padding: 3px var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ===== Rotating Hero ===== */
.hero-rotate-wrapper {
  position: relative;
  min-height: 1.2em;
}
.hero-rotate-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  transition: opacity 600ms ease;
  pointer-events: none;
}
.hero-rotate-item.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
}

/* ===== Category Color Borders (compact cards) ===== */
.project-card.compact[data-category~="anomaly"] { border-left: 4px solid var(--cat-anomaly); }
.project-card.compact[data-category~="vision"]  { border-left: 4px solid var(--cat-vision); }
.project-card.compact[data-category~="research"]{ border-left: 4px solid var(--cat-research); }
.project-card.compact[data-category~="thermal"] { border-left: 4px solid var(--cat-thermal); }
.project-card.compact[data-category~="quality"] { border-left: 4px solid var(--cat-quality); }
.project-card.compact[data-category~="tools"]   { border-left: 4px solid var(--cat-tools); }

/* ===== Page Load Fade-In ===== */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
main {
  animation: fade-in-up 600ms ease both;
}

/* ===== Skill Block Hover ===== */
.skill-block {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.skill-block:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.about-skill-card {
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.about-skill-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

/* ===== Scroll Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2) { transition-delay: 80ms; }
.reveal:nth-child(3) { transition-delay: 160ms; }
.reveal:nth-child(4) { transition-delay: 240ms; }
.reveal:nth-child(5) { transition-delay: 320ms; }
.reveal:nth-child(6) { transition-delay: 400ms; }

/* ===== Mobile Hamburger Menu ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid transparent;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 300ms ease, opacity 300ms ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 719px) {
  .hamburger {
    display: flex;
  }
}
.hamburger:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}

/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 250ms ease;
}
.mobile-drawer.open {
  pointer-events: auto;
  opacity: 1;
}
.mobile-drawer-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in oklab, var(--color-bg) 70%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.mobile-drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(300px, 80vw);
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-drawer.open .mobile-drawer-panel {
  transform: translateX(0);
}
.mobile-drawer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.mobile-drawer-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-md);
}
.mobile-drawer-nav a:hover,
.mobile-drawer-nav a[aria-current='page'] {
  background: var(--color-surface-offset);
  color: var(--color-primary);
}
.mobile-drawer-controls {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

/* ===== Scroll to Top Button ===== */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 300ms ease, transform 300ms ease, color var(--transition-interactive), background var(--transition-interactive);
}
.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.scroll-top:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-surface-offset);
}

/* Lang switching helpers — hide the inactive language, revert the active one
   so its native display value (inline / block / etc.) is preserved. */
html[lang='de'] [data-lang-en],
html[lang='en'] [data-lang-de] {
  display: none !important;
}

/* =====================================================================
   POLISH LAYER — refined UX/UI (additive, overrides earlier rules)
   ===================================================================== */

/* ---------- Header: glass + scroll-aware shadow ---------- */
.site-header {
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  transition: box-shadow 240ms ease, background 240ms ease, border-color 240ms ease;
}
.site-header.is-scrolled {
  box-shadow: 0 1px 0 0 var(--color-divider), 0 8px 24px -16px rgba(14, 20, 34, 0.16);
  background: color-mix(in oklab, var(--color-bg) 94%, transparent);
}
[data-theme='dark'] .site-header.is-scrolled {
  box-shadow: 0 1px 0 0 var(--color-divider), 0 8px 24px -12px rgba(0, 0, 0, 0.6);
}

/* Nav link underline-on-hover */
.nav-links a {
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: 4px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 240ms cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-links a:hover::after,
.nav-links a[aria-current='page']::after {
  transform: scaleX(1);
}
.nav-links a[aria-current='page'] {
  background: transparent;
}

/* ---------- Eyebrow: subtle pulse dot ---------- */
.eyebrow::before {
  width: 28px;
  background: linear-gradient(90deg, var(--color-primary), color-mix(in oklab, var(--color-primary) 20%, transparent));
}

/* Section heads get a slim accent above H2 */
.section-head h2 {
  position: relative;
}

/* ---------- Hero: subtle technical grid backdrop ---------- */
.hero {
  background-image:
    radial-gradient(ellipse 80% 60% at 80% 0%, color-mix(in oklab, var(--color-primary) 8%, transparent), transparent 60%),
    linear-gradient(to bottom, color-mix(in oklab, var(--color-primary-highlight) 35%, transparent), transparent 40%);
}
[data-theme='dark'] .hero {
  background-image:
    radial-gradient(ellipse 80% 60% at 80% 0%, color-mix(in oklab, var(--color-primary) 14%, transparent), transparent 60%),
    linear-gradient(to bottom, color-mix(in oklab, var(--color-primary) 6%, transparent), transparent 40%);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 65% 60% at 50% 30%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 65% 60% at 50% 30%, #000 0%, transparent 75%);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}
.hero .container {
  position: relative;
  z-index: 1;
}

/* Eyebrow gets a tinted chip on the hero */
.hero .eyebrow {
  padding: 4px var(--space-3) 4px var(--space-2);
  background: color-mix(in oklab, var(--color-primary) 8%, transparent);
  border: 1px solid color-mix(in oklab, var(--color-primary) 18%, transparent);
  border-radius: var(--radius-full);
  color: var(--color-primary);
}
.hero .eyebrow::before {
  width: 16px;
  background: var(--color-primary);
}

/* Hero headline rotation: stack all items in the same grid cell so the
   wrapper sizes to the tallest variant — prevents layout jump as items rotate. */
.hero-rotate-wrapper {
  display: grid;
  min-height: 0;
}
.hero-rotate-item {
  grid-column: 1;
  grid-row: 1;
  position: static;
  top: auto;
  left: auto;
  width: auto;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 500ms ease, transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.hero-rotate-item.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Hero skills & interests tag cloud (replaces the old meta strip) */
.hero-tags-section {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.hero-tags-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px var(--space-3) 6px 10px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-text);
  background: color-mix(in oklab, var(--color-surface) 80%, transparent);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
}
.hero-tag::before {
  content: '';
  flex-shrink: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.75;
}
.hero-tag:hover {
  border-color: color-mix(in oklab, var(--color-primary) 45%, var(--color-border));
  background: color-mix(in oklab, var(--color-primary) 8%, var(--color-surface));
  transform: translateY(-1px);
}
.hero-tag:hover::before {
  opacity: 1;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 18%, transparent);
}

/* Inspection card: subtle glow + corner notch detail */
.inspection {
  box-shadow:
    0 4px 16px rgba(14, 20, 34, 0.08),
    0 0 0 1px color-mix(in oklab, var(--color-primary) 12%, transparent),
    0 24px 60px -32px color-mix(in oklab, var(--color-primary) 50%, transparent);
}
[data-theme='dark'] .inspection {
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.5),
    0 0 0 1px color-mix(in oklab, var(--color-primary) 18%, transparent),
    0 24px 60px -28px color-mix(in oklab, var(--color-primary) 55%, transparent);
}

/* ---------- Buttons: refined press + glow ---------- */
.btn {
  position: relative;
  padding-block: calc(var(--space-3) + 1px);
  padding-inline: var(--space-5);
  letter-spacing: 0.01em;
  will-change: transform;
}
.btn-primary {
  box-shadow:
    0 1px 0 inset color-mix(in oklab, #fff 30%, transparent),
    0 6px 14px -6px color-mix(in oklab, var(--color-primary) 60%, transparent);
}
.btn-primary:hover {
  box-shadow:
    0 1px 0 inset color-mix(in oklab, #fff 30%, transparent),
    0 10px 26px -8px color-mix(in oklab, var(--color-primary) 70%, transparent);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow:
    0 1px 0 inset color-mix(in oklab, #fff 15%, transparent),
    0 2px 6px -2px color-mix(in oklab, var(--color-primary) 50%, transparent);
}
.btn svg {
  transition: transform var(--transition-interactive);
}
.btn:hover svg {
  transform: translateX(2px);
}

/* ---------- Filter bar: sticky with backdrop ---------- */
.filter-bar {
  position: sticky;
  top: calc(var(--space-16));
  z-index: 30;
  padding: var(--space-3) 0;
  margin: 0 calc(-1 * var(--space-2)) clamp(var(--space-6), 3vw, var(--space-10));
  padding-inline: var(--space-2);
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.filter-bar.is-stuck {
  border-bottom-color: var(--color-divider);
  box-shadow: 0 8px 16px -12px rgba(14, 20, 34, 0.15);
}
[data-theme='dark'] .filter-bar.is-stuck {
  box-shadow: 0 8px 16px -10px rgba(0, 0, 0, 0.6);
}
.filter-btn {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}
.filter-btn[aria-pressed='true'] {
  box-shadow: 0 6px 14px -8px color-mix(in oklab, var(--color-primary) 70%, transparent);
}

/* ---------- Project cards: lift, image scale, view-details cue ---------- */
.project-card {
  transition:
    border-color 260ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 260ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 260ms cubic-bezier(0.16, 1, 0.3, 1);
}
.project-card .project-visual {
  transition: background 320ms ease;
}
.project-card .project-visual svg {
  transition: transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: center;
}
.project-card:hover {
  border-color: color-mix(in oklab, var(--color-primary) 60%, var(--color-border));
  transform: translateY(-4px);
  box-shadow:
    0 12px 28px -16px rgba(14, 20, 34, 0.18),
    0 0 0 1px color-mix(in oklab, var(--color-primary) 18%, transparent);
}
[data-theme='dark'] .project-card:hover {
  box-shadow:
    0 16px 36px -16px rgba(0, 0, 0, 0.7),
    0 0 0 1px color-mix(in oklab, var(--color-primary) 30%, transparent);
}
.project-card:hover .project-visual svg {
  transform: scale(1.03);
}

/* "View details" cue at top-right of clickable cards */
.project-card[data-modal] .project-body {
  position: relative;
}
.project-card[data-modal] .project-body::after {
  content: '→';
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  opacity: 0;
  transform: translateX(-6px) rotate(-12deg);
  transition: opacity 240ms ease, transform 240ms cubic-bezier(0.16, 1, 0.3, 1),
    background 240ms ease, color 240ms ease, border-color 240ms ease;
}
.project-card[data-modal]:hover .project-body::after {
  opacity: 1;
  transform: translateX(0) rotate(0);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}
[data-theme='dark'] .project-card[data-modal]:hover .project-body::after {
  color: #0a0d14;
}

/* Featured card emphasis */
.project-card.featured {
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-primary) 4%, transparent), transparent 50%),
    var(--color-surface);
  border-color: color-mix(in oklab, var(--color-primary) 28%, var(--color-border));
}
.project-card.featured h3 {
  font-size: clamp(var(--text-lg), 2vw, var(--text-xl));
}
.project-card.featured .project-visual {
  background: var(--color-surface-2);
}

/* Project tags refined */
.project-meta .tag {
  background: var(--color-surface-2);
  transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
}
.project-card:hover .project-meta .tag {
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}

/* Metric value pop */
.metric .metric-value {
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, var(--color-primary), color-mix(in oklab, var(--color-primary) 70%, var(--color-text)));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Skills strip refinement ---------- */
.skills-strip {
  background:
    radial-gradient(ellipse 60% 80% at 50% 0%, color-mix(in oklab, var(--color-primary) 4%, transparent), transparent 60%);
}
.skill-block {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  text-align: left;
  position: relative;
  overflow: hidden;
}
.skills-strip-grid {
  text-align: left;
}
.skill-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, color-mix(in oklab, var(--color-primary) 12%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity 320ms ease;
  pointer-events: none;
}
.skill-block:hover {
  border-color: color-mix(in oklab, var(--color-primary) 40%, var(--color-border));
  transform: translateY(-3px);
}
.skill-block:hover::before {
  opacity: 1;
}
.skill-block > * {
  position: relative;
}
.skill-block .skill-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: color-mix(in oklab, var(--color-primary) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--color-primary) 20%, transparent);
  margin-bottom: var(--space-3);
}
.skill-block h3 {
  font-size: var(--text-base);
}
.skill-block p {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
}

/* ---------- About page refinements ---------- */
.profile-card {
  position: relative;
  overflow: hidden;
}
.profile-card::before {
  content: '';
  position: absolute;
  top: -60px;
  left: -60px;
  right: -60px;
  height: 140px;
  background: radial-gradient(ellipse at center, color-mix(in oklab, var(--color-primary) 16%, transparent), transparent 70%);
  pointer-events: none;
}
.profile-photo {
  position: relative;
  border: 3px solid var(--color-surface);
  box-shadow:
    0 0 0 1px color-mix(in oklab, var(--color-primary) 30%, transparent),
    0 12px 32px -10px color-mix(in oklab, var(--color-primary) 45%, transparent);
}

.timeline::before {
  background: linear-gradient(to bottom, color-mix(in oklab, var(--color-primary) 40%, var(--color-divider)), var(--color-divider));
}
.timeline-item h3 {
  font-size: var(--text-base);
  font-weight: 600;
}
.timeline-item.current h3 {
  color: var(--color-primary);
}
.timeline-item.current::before {
  animation: pulse-ring 2.4s ease-out infinite;
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--color-primary) 60%, transparent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.about-section h2 {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}
.about-section h2::before {
  content: '';
  width: 3px;
  height: 0.95em;
  background: var(--color-primary);
  border-radius: 2px;
  align-self: center;
}
/* Avoid double-marker on the title block */
.about-section#about-title h2::before { display: none; }

/* ---------- Modal: smoother animation, gallery hover ---------- */
.modal-panel {
  transition: opacity 280ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 360ms cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-backdrop {
  transition: opacity 300ms ease;
}
.modal-body .modal-subtitle {
  display: inline-block;
  padding: 3px var(--space-3);
  background: color-mix(in oklab, var(--color-primary) 12%, transparent);
  border-radius: var(--radius-full);
  color: var(--color-primary);
}
.modal-metrics-row {
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-primary) 6%, transparent), transparent 60%),
    var(--color-surface-2);
}
.modal-gallery figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  transition: transform 320ms cubic-bezier(0.16, 1, 0.3, 1), box-shadow 320ms ease, border-color 320ms ease;
}
.modal-gallery img {
  border: none;
  border-radius: 0;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-gallery figure:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in oklab, var(--color-primary) 35%, var(--color-border));
}
.modal-gallery figure:hover img {
  transform: scale(1.04);
}
.modal-gallery figcaption {
  padding: var(--space-3) var(--space-4) var(--space-4);
}

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  background: linear-gradient(135deg, color-mix(in oklab, var(--color-primary) 8%, transparent), transparent 70%);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-soft) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 60% 70% at 50% 50%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 50%, #000 0%, transparent 75%);
  opacity: 0.35;
  pointer-events: none;
}
.cta-banner > * { position: relative; }

/* ---------- Footer polish ---------- */
.site-footer {
  background: linear-gradient(to bottom, var(--color-bg), var(--color-surface));
}
.footer-meta {
  text-transform: none;
  letter-spacing: 0.02em;
}
.footer-social > a {
  padding: 2px 0;
  position: relative;
}
.footer-social > a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: width 220ms ease;
}
.footer-social > a:hover::after {
  width: 100%;
}

/* ---------- Edu items: subtle hover ---------- */
.edu-item {
  padding: var(--space-3) var(--space-3);
  margin-inline: calc(-1 * var(--space-3));
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-interactive);
}
.edu-item:hover {
  background: var(--color-surface);
}

/* ---------- Page hero subtle background ---------- */
.page-hero {
  background: linear-gradient(180deg, color-mix(in oklab, var(--color-primary) 5%, transparent), transparent 80%);
}

/* ---------- Focus ring consistency ---------- */
.project-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

/* ---------- Profile links: chip style ---------- */
.profile-links a {
  background: var(--color-surface-2);
  transition: background var(--transition-interactive), color var(--transition-interactive),
    border-color var(--transition-interactive), transform var(--transition-interactive);
}
.profile-links a:hover {
  background: color-mix(in oklab, var(--color-primary) 10%, transparent);
  transform: translateY(-1px);
}

/* ---------- Scroll-top: nudge animation ---------- */
.scroll-top svg {
  transition: transform var(--transition-interactive);
}
.scroll-top:hover svg {
  transform: translateY(-2px);
}

/* ---------- About skill card: refined ---------- */
.about-skill-card {
  background:
    linear-gradient(180deg, var(--color-surface), color-mix(in oklab, var(--color-surface-2) 60%, var(--color-surface)));
}

/* ---------- Smooth modal scroll within panel ---------- */
.modal-panel {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}
.modal-panel::-webkit-scrollbar { width: 8px; }
.modal-panel::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
.modal-panel::-webkit-scrollbar-track { background: transparent; }

/* ---------- Tighter section dividers ---------- */
section + section {
  border-top: 1px solid color-mix(in oklab, var(--color-divider) 70%, transparent);
}

/* ---------- Print-friendly small refinements ---------- */
@media print {
  .site-header, .site-footer, .scroll-top, .mobile-drawer, .hamburger, .filter-bar { display: none !important; }
  .hero::before, .cta-banner::before { display: none; }
  .project-card { break-inside: avoid; box-shadow: none; }
}

/* ---------- Mobile: compact spacing where it matters ---------- */
@media (max-width: 540px) {
  .filter-bar {
    top: calc(var(--space-12));
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .filter-bar::-webkit-scrollbar { display: none; }
  .filter-btn { flex-shrink: 0; }
  .project-card[data-modal] .project-body::after {
    top: var(--space-4);
    right: var(--space-4);
    width: 26px;
    height: 26px;
    font-size: 12px;
    opacity: 0.7; /* visible on touch (no hover) */
    transform: none;
  }
  .hero-meta {
    padding: var(--space-4);
  }
}

/* ---------- Reduce hero pattern in dark for clarity ---------- */
[data-theme='dark'] .hero::before {
  opacity: 0.25;
}

/* ---------- Modal close button: sticky in the top-right with glass bg ---------- */
.modal-close {
  margin: var(--space-3);
  background: color-mix(in oklab, var(--color-surface) 80%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.modal-body { padding-top: var(--space-2); }