/* ==============================================
   COMPONENTS — Navbar, cards, timeline, icons, tags
   ============================================== */

/* === NAVBAR === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  z-index: var(--z-navbar);
  transition: background-color var(--transition-base), border-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

.navbar--scrolled {
  background-color: rgba(36, 33, 30, 0.9);
  border-bottom-color: var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

[data-theme="light"] .navbar--scrolled {
  background-color: rgba(252, 249, 244, 0.9);
}

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

.navbar__logo {
  display: flex;
  align-items: center;
}

.navbar__logo img {
  height: 32px;
  width: auto;
}

.navbar__links {
  display: none;
  gap: var(--space-xs);
}

.navbar__links a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

.navbar__links a:hover {
  color: var(--color-text-primary);
  background-color: var(--color-accent-subtle);
}

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

.navbar__links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

.navbar__right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Hamburger toggle */
.navbar__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  padding: 2px;
}

.navbar__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-full);
  transform-origin: center;
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

/* Mobile menu */
.navbar__mobile-menu {
  display: none;
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-primary);
  padding: var(--space-xl);
  z-index: var(--z-navbar);
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.navbar--open .navbar__mobile-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  opacity: 1;
  transform: translateY(0);
}

.navbar__mobile-menu a {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  font-weight: 500;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.navbar__mobile-menu a:hover,
.navbar__mobile-menu a.active {
  color: var(--color-accent);
}

@media (min-width: 1024px) {
  .navbar__links {
    display: flex;
  }

  .navbar__toggle {
    display: none;
  }

  .navbar__mobile-menu {
    display: none !important;
  }
}

/* === HERO === */

/* Mobile: stacked (photo on top, text below, centered) */
.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2xl);
  max-width: var(--container-max);
  margin: 0 auto;
}

.hero__photo {
  flex-shrink: 0;
}

.hero__photo img {
  width: 200px;
  height: 260px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  border: 0px solid var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-subtle);
}

.hero__text {
  flex: 1;
  min-width: 0;
}

.hero__greeting {
  font-size: var(--text-lg);
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.hero__name {
  margin-bottom: var(--space-md);
}

.hero__title {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  font-weight: 400;
  margin-bottom: var(--space-xl);
}

.hero__title span {
  color: var(--color-accent2);
  font-weight: 500;
}

.hero__bio {
  font-size: var(--text-lg);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-lg);
}

.hero__typing {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent2);
  margin-bottom: var(--space-2xl);
  min-height: 1.8em;
}

.hero__social {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Desktop: two-column (photo left, text right) */
@media (min-width: 768px) {
  .hero__content {
    flex-direction: row;
    text-align: left;
    align-items: center;
    gap: var(--space-4xl);
  }

  .hero__photo img {
    width: 280px;
    height: 360px;
  }

  .hero__social {
    justify-content: flex-start;
  }
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.social-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  transform: translateY(-2px);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

/* === TECH STACK ICON GRID === */
.techstack-category {
  margin-bottom: var(--space-2xl);
}

.techstack-category:last-child {
  margin-bottom: 0;
}

.techstack-category__title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.icon-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.icon-grid__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-sm);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-base);
}

.icon-grid__item:hover {
  border-color: var(--color-border-hover);
  background-color: var(--color-accent-subtle);
  transform: translateY(-2px);
}

.icon-grid__item img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.icon-grid__item .icon--invert {
  filter: var(--icon-filter-invert);
}

.icon-grid__item span {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-align: center;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .icon-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (min-width: 1024px) {
  .icon-grid {
    grid-template-columns: repeat(8, 1fr);
  }
}

/* === TIMELINE (Experience) === */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 5px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-accent),
    var(--color-accent2),
    transparent
  );
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-2xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.timeline__card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.timeline__header {
  position: relative;
  margin-bottom: var(--space-md);
}

/* Dot is a pseudo-element on the header so it always
   vertically centers between role + company text */
.timeline__header::before {
  content: '';
  position: absolute;
  /* Reach back to the timeline line:
     card padding (--space-lg) + card border (1px) + timeline padding-left (32px)
     minus line center offset (6px) minus dot half-width (6px) */
  left: calc(-1 * var(--space-lg) - 33px);
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-bg-primary);
  z-index: var(--z-base);
}

[data-theme="light"] .timeline__header::before {
  border-color: var(--color-bg-primary);
}

.section--alt .timeline__header::before {
  border-color: var(--color-bg-secondary);
}

.timeline__role {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.timeline__company {
  font-size: var(--text-base);
  color: var(--color-accent2);
  font-weight: 500;
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
}

.timeline__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: var(--leading-normal);
}

.timeline__highlights {
  margin-bottom: var(--space-md);
}

.timeline__highlights li {
  position: relative;
  padding-left: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: var(--leading-normal);
}

.timeline__highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* === CARDS (Projects, Research) === */
.card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

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

.card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.card__title a {
  color: inherit;
  text-decoration: none;
}

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

.card__thumbnail a {
  display: block;
}

.card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-accent2);
  margin-bottom: var(--space-sm);
}

.card__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-md);
  flex: 1;
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.card__links {
  display: flex;
  gap: var(--space-sm);
}

.card__links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.card__links a:hover {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
}

.card__links a svg {
  width: 16px;
  height: 16px;
}

/* === Featured card === */
.card--featured {
  border-left: 3px solid var(--color-accent);
}

/* === Card thumbnail === */
.card__thumbnail {
  margin: calc(-1 * var(--space-lg)) calc(-1 * var(--space-lg)) var(--space-md);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
}

.card__thumbnail img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

/* === TAGS === */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-sm);
  border-radius: var(--radius-full);
  background-color: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: var(--text-xs);
  font-weight: 500;
  white-space: nowrap;
}

/* === EDUCATION CARD === */
.education-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 600px;
}

.education-card__degree {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.education-card__institution {
  font-size: var(--text-lg);
  color: var(--color-accent2);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.education-card__meta {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
}

.education-card__gpa {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.education-card__highlights li {
  position: relative;
  padding-left: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: var(--leading-normal);
}

.education-card__highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent2);
}

/* === ACHIEVEMENTS === */
.achievements-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.achievement-item {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base);
}

.achievement-item:hover {
  border-color: var(--color-border-hover);
}

.achievement-item__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
}

.achievement-item__icon img {
  max-width: 32px;
  max-height: 32px;
  object-fit: contain;
}

.achievement-item__content {
  flex: 1;
}

.achievement-item__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.achievement-item__year {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-sm);
}

.achievement-item__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

@media (min-width: 640px) {
  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === CONTACT === */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content__description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: var(--leading-normal);
}

.contact-content__email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-weight: 600;
  font-size: var(--text-base);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.contact-content__email:hover {
  background-color: var(--color-accent-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.contact-content__social {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

/* === FOOTER === */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}