:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #1f2030;
  --muted: #5e6176;
  --border: #dfe2ee;
  --accent: #6e4dcc;
  --accent-2: #ece7ff;
  --shadow: 0 10px 24px rgba(24, 18, 52, 0.08);
}

[data-theme="dark"] {
  --bg: #11121a;
  --surface: #1b1d2a;
  --text: #f3f4fb;
  --muted: #b7b9cb;
  --border: #303348;
  --accent: #a38cff;
  --accent-2: #2b2444;
  --shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] body {
  background:
    radial-gradient(circle at 14% -8%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 40%),
    radial-gradient(circle at 92% 0%, color-mix(in srgb, var(--accent-2) 88%, #11121a), transparent 44%),
    linear-gradient(165deg, #10111a 0%, #151829 56%, #101420 100%);
}

html {
  scroll-behavior: smooth;
}

body {
  background: radial-gradient(circle at top right, var(--accent-2), transparent 45%), var(--bg);
  color: var(--text);
}

a {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 50%, white);
  outline-offset: 2px;
}

.profile-header {
  position: relative;
  background:
    radial-gradient(circle at 12% 8%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 40%),
    var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 16px 30px color-mix(in srgb, var(--accent) 28%, transparent);
  overflow: hidden;
}

[data-theme="dark"] .profile-header {
  background:
    radial-gradient(circle at 10% 10%, color-mix(in srgb, var(--accent) 30%, transparent), transparent 42%),
    linear-gradient(145deg, #24283b 0%, #1f2335 52%, #1a1f2f 100%);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}

.profile-header .text-white {
  color: var(--text) !important;
}

.profile-header .text-secondary {
  color: var(--muted) !important;
}

.profile-header .icon {
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  padding: 0.4rem 0.8rem;
  margin: 0.2rem;
}

.hero-kicker {
  font-size: 0.92rem;
  letter-spacing: 0.16em;
  font-weight: 700;
  color: var(--accent);
}

.hero-title {
  font-size: clamp(2rem, 4.2vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-summary {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.02rem;
}

.hero-roles {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.hero-role {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  padding: 0;
  font-weight: 700;
  font-size: 1.22rem;
}

.hero-role + .hero-role::before {
  content: "•";
  margin-right: 0.55rem;
  color: var(--accent);
}

.hero-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.nav-tabs {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  padding: 0.65rem 0.2rem 0.75rem;
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.nav-tabs .nav-link {
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 10px 10px 0 0;
  background: var(--surface);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.55rem 1rem;
  line-height: 1.2;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
  text-shadow: none;
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.tab-icon {
  display: inline-block;
  margin-right: 0.45rem;
  font-size: 1.05em;
  line-height: 1;
  vertical-align: -0.05em;
}

.tab-icon svg {
  fill: var(--accent);
}

[data-theme="dark"] .tab-icon svg {
  fill: #ffffff;
}

.nav-tabs .nav-link:hover,
.nav-tabs .nav-link:focus,
.nav-tabs .nav-link.active {
  color: var(--accent);
  background: var(--surface);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  border-bottom-color: var(--accent);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 24%, transparent);
  transform: translateY(-1px);
}

.theme-toggle {
  margin-left: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  padding: 0.35rem 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.profile-header .theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  margin-left: 0;
}

.tab-content {
  padding-top: 0.75rem;
}

.tab-pane > .row.mt-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.tab-pane > .row.mt-2 > .col {
  width: auto;
  max-width: none;
  padding: 0;
}

.card {
  width: 100% !important;
  min-height: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.card .card-subtitle,
.card .text-secondary {
  color: var(--muted) !important;
}

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

.card .card-body {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card .card-body > .row:first-child {
  position: relative;
  margin-left: 0;
  margin-right: 0;
  padding-right: 0;
}

.card .card-body > .row:first-child > .col:first-child {
  padding-left: 0;
  padding-right: 0;
  padding-right: 2rem;
}

.card .card-body > .row:first-child > .col:nth-child(2) {
  position: absolute;
  top: 0;
  right: 0;
  width: auto;
  padding-left: 0;
  padding-right: 0;
  display: flex;
  justify-content: flex-end;
}

.card .row.mt-2 {
  margin-top: auto !important;
  margin-left: 0;
  margin-right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.5rem;
  width: 100%;
}

.card .row.mt-2 > .col {
  flex: 1 1 auto;
  padding-left: 0;
  padding-right: 0;
}

.card .row.mt-2 > .col:last-child {
  margin-left: auto;
  flex: 0 0 auto;
  text-align: right;
}

.card .row.mt-2 > .col:last-child.d-flex {
  justify-content: flex-end;
}

.card .row.mt-2 > .col.text-secondary,
.card .row.mt-2 > .text-secondary {
  margin-left: auto;
  display: flex;
  justify-content: flex-end;
  text-align: right;
}

.card .row.mt-2 > .col.text-secondary > * {
  margin-left: auto;
  text-align: right;
}

.lang-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.lang-tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.1;
}

.topic-tag {
  background: var(--accent-2);
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
}

.topic-ai {
  background: #7927f5;
  color: #ffffff;
  border-color: transparent;
}

.topic-cv {
  background: #278bf5;
  color: #ffffff;
  border-color: transparent;
}

.topic-paper {
  background: #f1e7ff;
  color: #4b2d8c;
  border-color: #d5bfff;
}

#conferences .card .row.mt-2 .col p {
  color: var(--accent);
  font-weight: 700;
}

.card-clickable {
  cursor: pointer;
}

.keyword-tag {
  background: color-mix(in srgb, var(--surface) 40%, var(--accent-2));
  color: var(--text);
  border: 1px solid var(--border);
}

.subtitle-tag {
  background: color-mix(in srgb, var(--surface) 35%, #e8ecf7);
  color: var(--text);
  border: 1px solid var(--border);
}

.subtitle-hidden {
  display: none;
}

.tag-filter-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  margin: 0.75rem 0 0.5rem;
  color: var(--muted);
}

.tag-filter-label {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.tag-filter-select {
  max-width: 280px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  padding: 0.35rem 0.6rem;
}

.site-footer {
  margin: 2rem auto 1rem;
  padding: 0.9rem 1rem;
  text-align: center;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

@media (min-width: 768px) {
  .tab-pane > .row.mt-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .tab-pane > .row.mt-2 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}