/* ─── Reset ────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ─── Custom Properties ────────────────────────────────────────────────────── */
:root {
  --color-sidebar-bg:  #0f172a;
  --color-main-bg:     #1e293b;
  --color-accent:      #7c3aed;
  --color-accent-glow: rgba(124, 58, 237, 0.35);
  --color-accent-text: #b197fc;
  --color-text:        #e2e8f0;
  --color-text-muted:  #94a3b8;
  --color-border:      rgba(255, 255, 255, 0.08);
  --color-card-bg:     rgba(255, 255, 255, 0.04);
  --sidebar-width:     300px;
  --font-family:       'Inter', system-ui, -apple-system, sans-serif;
  --transition-base:   200ms ease;
  --radius-card:       12px;
  --radius-badge:      6px;
}

/* ─── Base ─────────────────────────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--color-main-bg);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-accent-text);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ─── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

/* ─── Layout ────────────────────────────────────────────────────────────────── */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ────────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-sidebar-bg);
}

.sidebar__inner {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

/* ─── Sidebar Header ─────────────────────────────────────────────────────────── */
.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.sidebar__social {
  display: flex;
  gap: 0.625rem;
  align-items: center;
}

.sidebar__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* ─── Avatar ────────────────────────────────────────────────────────────────── */
.sidebar__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.avatar-initials {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  user-select: none;
}

/* ─── Sidebar Text ───────────────────────────────────────────────────────────── */
.sidebar__name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 0.25rem;
}

.sidebar__role {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent-text);
  margin-bottom: 0.375rem;
}

.sidebar__location {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* ─── Sidebar Divider ────────────────────────────────────────────────────────── */
.sidebar__divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 1.25rem 0;
}

/* ─── Sidebar Sections ───────────────────────────────────────────────────────── */
.sidebar__section {
  margin-bottom: 0;
}

.sidebar__section-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.625rem;
}

.sidebar__text {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ─── Language List ──────────────────────────────────────────────────────────── */
.language-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.language-item {
  font-size: 0.8125rem;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.language-item__level {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}


/* ─── Main Content ───────────────────────────────────────────────────────────── */
.main-content {
  flex: 1;
  background: var(--color-main-bg);
  padding: 2.5rem 2.5rem 4rem;
  min-width: 0;
}

/* ─── Sections ───────────────────────────────────────────────────────────────── */
.section {
  margin-bottom: 3rem;
}

.section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-text);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

/* ─── Card Shared ────────────────────────────────────────────────────────────── */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.25rem 1.5rem;
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent), 0 4px 24px var(--color-accent-glow);
  transform: translateY(-2px);
}

/* ─── Timeline ───────────────────────────────────────────────────────────────── */
.timeline {
  list-style: none;
  position: relative;
}

.timeline__item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.timeline__marker {
  flex-shrink: 0;
  width: 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 4px;
}

.timeline__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-main-bg);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.timeline__item--volunteer .timeline__dot {
  background: var(--color-text-muted);
}

.timeline__line {
  flex: 1;
  width: 2px;
  background: var(--color-border);
  margin-top: 4px;
}

.timeline__item:last-child .timeline__line {
  display: none;
}

.timeline__card {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}

/* ─── Timeline Card Content ───────────────────────────────────────────────────── */
.card-header {
  margin-bottom: 0.875rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.card-company {
  font-weight: 500;
}

.card-dates {
  color: var(--color-text-muted);
}

.card-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.35);
  color: var(--color-accent-text);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-badge--volunteer {
  background: rgba(148, 163, 184, 0.1);
  border-color: rgba(148, 163, 184, 0.3);
  color: var(--color-text);
}

.card-duties {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.card-duties > li {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding-left: 1rem;
  position: relative;
  line-height: 1.55;
}

.card-duties > li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.card-duties .card-duties {
  margin-top: 0.375rem;
  padding-left: 1rem;
}

.card-duties .card-duties > li::before {
  content: '·';
}

/* ─── Skills ─────────────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.skill-category__title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-badge);
  background: rgba(124, 58, 237, 0.12);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: var(--color-text);
  font-size: 0.8rem;
  font-weight: 500;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.badge:hover {
  background: rgba(124, 58, 237, 0.28);
  border-color: var(--color-accent);
}

/* ─── Article Cards ──────────────────────────────────────────────────────────── */
.article-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.article-card {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

.article-card:hover {
  text-decoration: none;
}

.article-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: calc(var(--radius-card) - 1px) calc(var(--radius-card) - 1px) 0 0;
  display: block;
}

.article-card__body {
  padding: 1.125rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.375rem;
}

.article-card__publisher {
  font-size: 0.6875rem;
  color: var(--color-accent-text);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.article-card__title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.article-card__description {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  flex: 1;
}

.article-card__date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: auto;
  padding-top: 0.5rem;
}

/* Article cards without image (fallback / no image) get standard padding */
.article-card:not(:has(.article-card__image)) {
  padding: 1.25rem 1.5rem;
}
.article-card:not(:has(.article-card__image)) .article-card__body {
  padding: 0;
}

/* ─── Skeleton Loading ───────────────────────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.article-card--skeleton {
  padding: 0;
  cursor: default;
  pointer-events: none;
}

.article-card--skeleton:hover {
  transform: none;
  border-color: var(--color-border);
  box-shadow: none;
}

.article-card__image--skeleton {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius-card) - 1px) calc(var(--radius-card) - 1px) 0 0;
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.09) 50%,
    rgba(255,255,255,0.04) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.article-card__skeleton-line {
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.09) 50%,
    rgba(255,255,255,0.04) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  margin: 0 1.25rem;
}

.article-card__skeleton-line + .article-card__skeleton-line {
  margin-top: 0.5rem;
  width: 70%;
}

.article-card__skeleton-line:last-child {
  margin-bottom: 1.25rem;
  width: 90%;
}

/* ─── Projects ───────────────────────────────────────────────────────────────── */
.project-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-card__description {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--color-accent-text);
  text-decoration: underline;
}

/* ─── Academic History ───────────────────────────────────────────────────────── */
.academic-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.edu-card__degree {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.edu-card__institution {
  font-size: 0.8125rem;
  color: var(--color-accent-text);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.edu-card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.edu-card__note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ─── Certifications ─────────────────────────────────────────────────────────── */
.cert-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cert-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-badge);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  flex-wrap: wrap;
  transition: border-color var(--transition-base);
}

.cert-item:has(> .cert-item__link):hover {
  border-color: rgba(124, 58, 237, 0.4);
}

.cert-item__name {
  font-size: 0.875rem;
  color: var(--color-text);
  font-weight: 500;
  flex: 1;
}

.cert-item__date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.cert-item__link {
  font-size: 0.75rem;
  color: var(--color-accent-text);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition-base);
}

.cert-item__link:hover {
  opacity: 0.8;
  text-decoration: none;
}

/* ─── Certification sub-items (Deque children) ───────────────────────────────── */
.cert-item--has-children {
  flex-direction: column;
  align-items: stretch;
}

.cert-sublist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding-left: 1rem;
  border-left: 2px solid var(--color-border);
  margin-top: 0.25rem;
}

.cert-subitem {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-badge);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  flex-wrap: wrap;
  transition: border-color var(--transition-base);
}

.cert-subitem:has(.cert-item__link):hover {
  border-color: rgba(124, 58, 237, 0.4);
}

.cert-subitem__name {
  font-size: 0.8125rem;
  color: var(--color-text);
  font-weight: 400;
  flex: 1;
}

/* ─── Certificate Modal ──────────────────────────────────────────────────────── */
#cert-modal {
  position: fixed;
  margin: auto;
  padding: 0;
  border: none;
  border-radius: var(--radius-badge);
  background: var(--color-card-bg);
  width: min(90vw, 900px);
  height: min(90vh, 700px);
  flex-direction: column;
}

#cert-modal[open] {
  display: flex;
}

#cert-modal::backdrop {
  background: rgba(0, 0, 0, 0.7);
}

.cert-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  gap: 1rem;
}

.cert-modal__external {
  font-size: 0.75rem;
  color: var(--color-accent-text);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition-base);
}

.cert-modal__external:hover {
  opacity: 0.8;
}

.cert-modal__close {
  background: none;
  border: none;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition-base);
}

.cert-modal__close:hover {
  color: var(--color-text);
}

.cert-modal__frame {
  flex: 1;
  width: 100%;
  border: none;
  border-radius: 0 0 var(--radius-badge) var(--radius-badge);
}

button.cert-item__link {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 767px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .sidebar__inner {
    position: static;
    height: auto;
    overflow-y: visible;
    padding: 1.5rem 1rem 1rem;
  }

  .main-content {
    padding: 1.5rem 1rem 3rem;
  }

  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }

  .article-cards {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --sidebar-width: 240px;
  }

  .main-content {
    padding: 2rem 1.5rem 3rem;
  }
}