/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 12px;
}

.nav__brand {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-text);
  display: inline-block;
  padding-left: 1.1em;
  text-indent: -1.1em;
  transition: opacity 0.15s ease;
}

.nav__brand:hover {
  opacity: 0.8;
}

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

.nav__links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav__links a {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.nav__links a:hover {
  color: var(--color-accent);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: transparent;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 640px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    padding: 8px 24px 16px;
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__links a {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .lang-toggle {
    align-self: flex-start;
    margin-top: 8px;
  }
}

/* Language toggle */
.lang-toggle {
  display: flex;
  gap: 4px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.lang-toggle__button {
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 3px;
  transition: background 0.15s ease, color 0.15s ease;
}

.lang-toggle__button.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

/* Hero */
.hero {
  padding-top: 96px;
  padding-bottom: 96px;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.9rem;
}

.hero__eyebrow::before {
  content: "> ";
}

.hero__name {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin: 0.2em 0 0.1em;
}

.hero__role {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 1em;
}

.hero__tagline {
  max-width: 560px;
  color: var(--color-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 1.5em;
}

/* Buttons */
.button {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.button--primary {
  color: var(--color-bg);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.button--primary:hover {
  opacity: 0.9;
}

.button--secondary {
  color: var(--color-accent);
}

.button--secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

/* Cards (shared) */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

/* About */
.about__intro {
  color: var(--color-text-muted);
  max-width: 620px;
}

.about__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about__list dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.about__list dd {
  margin: 2px 0 0;
}

.about__list dd.about__degree {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 10px;
}

.about__list dd.about__degree:first-of-type {
  margin-top: 4px;
}

.about__degree-main {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.about__degree-icon {
  margin-top: 4px;
}

.about__degree-years {
  margin-left: 24px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* Experience */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.experience-item {
  padding-left: 20px;
  border-left: 2px solid var(--color-border);
}

.experience-item__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.experience-item__role {
  font-weight: 500;
}

.experience-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}

.experience-item__dates {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  white-space: nowrap;
}

.experience-item__location {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.experience-item__description {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 8px 0 0;
}

/* Project cards */
.project-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-card__title {
  font-size: 1.05rem;
  min-height: 2.65rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-clamp: 2;
  overflow: hidden;
}

.project-card__description {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
  flex-grow: 1;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.project-card__environment {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.project-card__link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  align-self: flex-start;
}

.project-card__link:hover {
  text-decoration: underline;
}

/* Certification cards */
.cert-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  min-height: 140px;
}

.cert-card__name {
  font-weight: 500;
  line-height: 1.35;
  min-height: 2.7rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-clamp: 2;
  overflow: hidden;
}

.cert-card__code {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.cert-card__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.cert-issuer {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.issuer-icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.issuer-icon svg {
  width: 100%;
  height: 100%;
}

.cert-card__verify-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  white-space: nowrap;
}

.cert-card__verify-link:hover {
  text-decoration: underline;
}

/* Retired certifications */
.subsection-heading {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 32px 0 12px;
}

.retired-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.retired-list li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.retired-list li:last-child {
  border-bottom: none;
}

.retired-list__code {
  font-family: var(--font-mono);
  color: var(--color-text);
}

.retired-list__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.retired-list__verify-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .retired-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .retired-list__meta {
    margin-left: 0;
    width: 100%;
    justify-content: space-between;
  }
}

.retired-list__verify-link:hover {
  text-decoration: underline;
}

/* Contact */
.contact__links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 1.5em;
}

@media (max-width: 640px) {
  .contact__links {
    gap: 12px;
  }

  .contact__link:nth-child(1),
  .contact__link:nth-child(2) {
    flex: 1 1 0;
    justify-content: center;
  }
}

.contact__link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  transition: border-color 0.15s ease, color 0.15s ease;
  min-width: 0;
  max-width: 100%;
}

.contact__link span:last-child {
  overflow-wrap: anywhere;
  word-break: break-word;
}

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

.contact__link-icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact__link-icon svg {
  width: 100%;
  height: 100%;
}

/* Footer */
.footer {
  padding: 32px 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  display: flex;
  justify-content: center;
  text-align: center;
}