/* ========================================
   Navigation
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  text-decoration: none;
}

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

.nav__links {
  display: flex;
  gap: var(--sp-8);
}

.nav__links a {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

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

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ========================================
   Hero
   ======================================== */

.hero__inner {
  display: flex;
  gap: var(--sp-12);
  align-items: flex-start;
}

.hero__photo {
  width: 160px;
  height: 160px;
  min-width: 160px;
  border-radius: var(--radius-full);
  background-color: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  color: var(--text-secondary);
  user-select: none;
  overflow: hidden;
}

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

.hero__photo-fallback {
  display: none;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.hero__name {
  margin-bottom: var(--sp-2);
}

.hero__tagline {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
  font-family: var(--font-heading);
  font-style: italic;
}

.hero__bio p {
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.hero__social {
  display: flex;
  gap: var(--sp-4);
  margin-top: var(--sp-6);
}

.hero__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.hero__social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: rgba(61, 90, 128, 0.05);
}

.hero__social svg {
  width: 18px;
  height: 18px;
}

.hero__contact {
  margin-top: var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.hero__contact a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 2px;
}

.hero__contact a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

/* ========================================
   Affiliations
   ======================================== */

.affiliations__grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6);
  justify-content: center;
}

.affiliation-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--sp-6) var(--sp-4);
  min-width: 140px;
  max-width: 180px;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform var(--transition-fast);
}

.affiliation-card:hover {
  transform: translateY(-2px);
  color: var(--text-primary);
}

.affiliation-card__logo {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-3);
  overflow: hidden;
}

.affiliation-card__logo img {
  max-width: 56px;
  max-height: 56px;
  object-fit: contain;
}

.affiliation-card__logo span {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-align: center;
  line-height: 1.2;
  padding: var(--sp-1);
}

.affiliation-card__institution {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  margin-bottom: var(--sp-1);
}

.affiliation-card__role {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  line-height: 1.3;
}

.affiliation-card__period {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: var(--sp-1);
}

/* ========================================
   Logo Bar (Featured In)
   ======================================== */

.logo-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
}

.logo-bar__item {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.logo-bar__item:hover {
  transform: translateY(-1px);
}

.logo-bar__item img {
  height: 36px;
  width: auto;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: filter var(--transition-base), opacity var(--transition-base);
}

.logo-bar__item:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* Text-based logo placeholder */
.logo-bar__text {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.logo-bar__item:hover .logo-bar__text {
  color: var(--text-primary);
  border-color: var(--border);
}

/* ========================================
   Writing List (Selected Writing)
   ======================================== */

.writing-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.writing-item {
  display: block;
  padding: var(--sp-4) var(--sp-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
  border-bottom: 1px solid var(--border-light);
}

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

.writing-item:hover {
  background-color: rgba(61, 90, 128, 0.04);
  color: var(--text-primary);
}

.writing-item__header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  margin-bottom: var(--sp-1);
  flex-wrap: wrap;
}

.writing-item__title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
}

.writing-item__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-2);
}

.writing-item__venue {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.writing-item__date {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.writing-item__coauthors {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  font-style: italic;
}

.writing-item__description {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-top: var(--sp-2);
  line-height: var(--lh-normal);
}

/* Type Tags */
.tag {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.tag--op-ed {
  background-color: var(--tag-op-ed);
  color: var(--tag-op-ed-text);
}

.tag--policy-analysis,
.tag--policy-brief,
.tag--policy-contribution,
.tag--standards-work {
  background-color: var(--tag-policy);
  color: var(--tag-policy-text);
}

.tag--working-paper,
.tag--research-in-progress,
.tag--conference-paper {
  background-color: var(--tag-working-paper);
  color: var(--tag-working-paper-text);
}

.tag--newsletter {
  background-color: var(--tag-newsletter);
  color: var(--tag-newsletter-text);
}

.tag--thesis {
  background-color: var(--tag-thesis);
  color: var(--tag-thesis-text);
}

.tag--report {
  background-color: var(--tag-report);
  color: var(--tag-report-text);
}

.view-all-link {
  display: inline-block;
  margin-top: var(--sp-6);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--accent);
}

.view-all-link:hover {
  color: var(--accent-hover);
}

/* ========================================
   Media List (In the Media)
   ======================================== */

.media-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.media-item {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
  border-bottom: 1px solid var(--border-light);
}

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

.media-item:hover {
  background-color: rgba(61, 90, 128, 0.04);
  color: var(--text-primary);
}

.media-item__outlet {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  min-width: 140px;
  color: var(--text-secondary);
}

.media-item__headline {
  font-size: var(--fs-sm);
  color: var(--text-primary);
  flex: 1;
}

.media-item__date {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  white-space: nowrap;
}

/* ========================================
   Talks List
   ======================================== */

.talks-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.talk-item {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border-light);
}

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

.talk-item__header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.talk-item__event {
  font-family: var(--font-heading);
  font-weight: var(--fw-medium);
  font-size: var(--fs-base);
}

.talk-item__location {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.talk-item__date {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.talk-item__description {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-top: var(--sp-1);
}

/* ========================================
   Research Interests
   ======================================== */

.research-text {
  max-width: 680px;
}

.research-text p {
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  font-size: var(--fs-lg);
}

.research-text strong {
  color: var(--text-primary);
}

/* ========================================
   Newsletter CTA
   ======================================== */

.newsletter__inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.newsletter__description {
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
}

.btn {
  display: inline-block;
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn--primary {
  background-color: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background-color: var(--accent-hover);
  color: #fff;
}

/* ========================================
   Footer
   ======================================== */

.footer {
  padding: var(--sp-8) 0;
  border-top: 1px solid var(--border-light);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copy {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: 0;
}

.footer__links {
  display: flex;
  gap: var(--sp-6);
}

.footer__links a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer__links a:hover {
  color: var(--text-primary);
}

/* ========================================
   Writing Page (Full List)
   ======================================== */

.writing-page__category {
  margin-bottom: var(--sp-12);
}

.writing-page__category h3 {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--border);
}

/* ========================================
   About Page
   ======================================== */

.about-content {
  max-width: 680px;
}

.about-content h2 {
  margin-top: var(--sp-12);
}

.about-content h2:first-child {
  margin-top: 0;
}

.about-content p {
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.about-content ul {
  list-style: disc;
  padding-left: var(--sp-6);
  margin-bottom: var(--sp-4);
}

.about__photo {
  margin: 2.5rem 0;
}

.about__photo figcaption {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
  text-align: center;
  font-style: italic;
}

.about__photo img {
  display: block;
  margin: 0 auto;
}
.about-content li {
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--sp-2);
}