.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-base) var(--space-desktop);
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--outline-variant);
  text-transform: uppercase;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-btn {
  background: none;
  border: none;
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--outline);
  cursor: pointer;
  padding: 2px 0;
  transition: color var(--duration-fast) ease;
  text-transform: uppercase;
}

.lang-btn:hover,
.lang-btn.active {
  color: var(--accent-gold);
}

.lang-sep {
  font-family: var(--font-label);
  font-size: 0.55rem;
  color: var(--outline-variant);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-family: var(--font-display);
  font-size: var(--text-metadata);
  color: var(--on-surface-variant);
  letter-spacing: 0.1em;
  transition: color var(--duration-fast) ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent-gold);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--duration-fast) var(--ease-out-expo);
}

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

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-connect {
  font-family: var(--font-display);
  font-size: var(--text-metadata);
  color: var(--primary);
  letter-spacing: 0.1em;
  transition: color var(--duration-fast) ease;
}

.nav-connect:hover {
  color: var(--accent-gold);
}

@media (max-width: 768px) {
  .nav {
    padding-left: var(--space-mobile);
    padding-right: var(--space-mobile);
  }
  .nav-links {
    display: none;
  }
  .nav-connect {
    display: none;
  }
  .lang-switcher {
    gap: 4px;
  }
}

/* Progress bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  z-index: 60;
  background: var(--surface-container-high);
}

.scroll-progress-bar {
  width: 100%;
  background: var(--accent-gold);
  transition: height 50ms linear;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-gutter);
}

.timeline-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--outline);
  opacity: 0.3;
}

.timeline-entry {
  position: relative;
  margin-bottom: 40px;
  padding-left: var(--space-gutter);
}

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

.timeline-dot {
  position: absolute;
  left: -5px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--accent-gold);
  box-shadow: 0 0 0 0 rgba(191, 140, 60, 0.5);
  animation: dot-pulse 3s ease-in-out infinite;
}

.timeline-dot.dim {
  background: var(--outline);
  box-shadow: none;
  animation: none;
}

.timeline-date {
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  margin-bottom: var(--space-base);
}

.timeline-date.dim {
  color: var(--outline);
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  color: inherit;
  margin-bottom: var(--space-base);
}

.timeline-body {
  font-family: var(--font-body);
  font-size: var(--text-body-reading);
  color: inherit;
  overflow-wrap: break-word;
  word-break: break-word;
}

@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(191, 140, 60, 0.5); }
  50% { box-shadow: 0 0 0 6px rgba(191, 140, 60, 0); }
}

/* Cards */
.card {
  padding: var(--space-card);
  border: 1px solid var(--outline-variant);
  transition: transform var(--duration-fast) var(--ease-out-expo),
              border-color var(--duration-fast) ease,
              box-shadow var(--duration-fast) ease;
  position: relative;
  overflow: hidden;
  display: block;
}

/* Clickable card wrapper */
a.card-link {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-gold);
  box-shadow: var(--shadow-md);
}

.card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  transform: translateX(-50%);
  transition: width var(--duration-fast) var(--ease-out-expo);
}

.card:hover::before {
  width: 100%;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: var(--space-base);
  color: var(--accent-gold);
}

.card-subtitle {
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  margin-bottom: 16px;
}

.card-body {
  font-family: var(--font-body);
  font-size: var(--text-body-reading);
  line-height: var(--leading-body);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  border: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
}

/* Link with underline animation */
.link-underline {
  position: relative;
  display: inline-block;
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  padding-bottom: 2px;
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-fast) var(--ease-out-expo);
}

.link-underline:hover::after {
  transform: scaleX(1);
}

/* Section divider (gold line) */
.section-divider {
  width: 64px;
  height: 1px;
  background: var(--accent-gold);
  margin: 40px 0;
}

/* Publication item */
.pub-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--outline-variant);
}

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

.pub-title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: inherit;
  transition: color var(--duration-fast) ease;
}

.pub-title:hover {
  color: var(--accent-gold);
}

.pub-journal {
  font-family: var(--font-body);
  font-size: var(--text-metadata);
  margin-top: 4px;
}

.pub-year {
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  font-weight: 600;
  color: var(--accent-gold);
  letter-spacing: var(--tracking-label);
}

/* Skill bar */
.skill-group-title {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: var(--tracking-display);
  margin-bottom: 24px;
  color: var(--accent-gold);
}

.skill-item {
  font-family: var(--font-body);
  font-size: var(--text-body-reading);
  padding: 8px 0;
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.skill-level {
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--outline);
  white-space: nowrap;
}

/* Hobby card */
.hobby-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
}

.hobby-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.2);
  transition: transform var(--duration-slow) ease, filter var(--duration-fast) ease;
}

.hobby-card:hover img {
  transform: scale(1.05);
  filter: grayscale(0.5) contrast(1);
}

.hobby-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  font-family: var(--font-display);
  font-size: var(--text-metadata);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--on-surface);
  transition: opacity var(--duration-fast) ease;
}

/* Contact */
.contact-block {
  text-align: center;
}

.contact-email {
  font-family: var(--font-display);
  font-size: var(--text-display-md);
  color: var(--accent-gold);
  transition: opacity var(--duration-fast) ease;
}

.contact-email:hover {
  opacity: 0.7;
}

.contact-social {
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--on-surface-variant);
  transition: color var(--duration-fast) ease;
}

.contact-social:hover {
  color: var(--accent-gold);
}

/* Watermark */
.watermark {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  overflow: hidden;
  font-family: var(--font-display);
  font-size: var(--text-display-lg);
  color: var(--on-surface);
  opacity: 0.06;
  white-space: nowrap;
  z-index: 0;
}

/* Custom cursor */
.custom-cursor {
  width: 32px;
  height: 32px;
  border: 1px solid var(--accent-gold);
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  display: none;
  transition: width 150ms ease, height 150ms ease, border-color 150ms ease;
}

.custom-cursor.hover {
  width: 48px;
  height: 48px;
  border-color: var(--primary);
}

@media (min-width: 1024px) {
  .custom-cursor {
    display: block;
  }
}

/* Footer */
.footer {
  position: relative;
  padding-top: var(--space-gap);
  padding-bottom: var(--space-gap);
  padding-left: var(--space-desktop);
  padding-right: var(--space-desktop);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  border-top: 1px solid var(--outline-variant);
  overflow: hidden;
}

.footer-copy {
  font-family: var(--font-body);
  font-size: var(--text-metadata);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--on-surface-variant);
  position: relative;
  z-index: 1;
}

.footer-links {
  display: flex;
  gap: 32px;
  margin-top: 16px;
  position: relative;
  z-index: 1;
}

.footer-credit {
  font-family: var(--font-body);
  font-size: var(--text-metadata);
  color: var(--on-surface-variant);
  opacity: 0.5;
  margin-top: 24px;
  position: relative;
  z-index: 1;
}

.footer-photo {
  position: absolute;
  right: var(--space-desktop);
  bottom: var(--space-gap);
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  object-fit: cover;
  filter: grayscale(1) contrast(1.3);
  opacity: 0.3;
  z-index: 1;
}

@media (max-width: 768px) {
  .footer {
    padding-left: var(--space-mobile);
    padding-right: var(--space-mobile);
    align-items: center;
  }
  .footer-photo {
    display: none;
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 100;
  padding: 8px 16px;
  background: var(--accent-gold);
  color: var(--on-primary);
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  transition: top 200ms ease;
}

.skip-link:focus {
  top: 8px;
}