/* ==========================================================================
   Site Nav + Dark Mode
   ========================================================================== */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10000;
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.site-nav__inner {
  display: flex;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.72rem 1.15rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-nav__brand {
  color: #0f172a;
  font-size: 1.02rem;
  font-weight: 750;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav__brand:hover {
  color: #2563eb;
  text-decoration: none;
}

.site-nav__right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.site-nav__links a {
  padding: 0.38rem 0.62rem;
  border-radius: 0.45rem;
  color: #475569;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 0.18s ease, background 0.18s ease;
}

.site-nav__links a:hover {
  color: #0f172a;
  background: rgba(37, 99, 235, 0.08);
  text-decoration: none;
}

.site-nav__burger {
  display: none;
  width: 2.35rem;
  height: 2.35rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.28rem;
  padding: 0;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.7);
  cursor: pointer;
}

.site-nav__burger span {
  display: block;
  width: 1.05rem;
  height: 1.5px;
  border-radius: 999px;
  background: #334155;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav.is-open .site-nav__burger span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-nav.is-open .site-nav__burger span:nth-child(2) {
  opacity: 0;
}

.site-nav.is-open .site-nav__burger span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.theme-toggle {
  position: relative;
  display: inline-flex;
  width: 2.35rem;
  height: 2.35rem;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 999px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.85));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  color: #0f172a;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, background 0.35s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px) scale(1.04);
}

.theme-toggle:focus-visible {
  outline: 2px solid #38bdf8;
  outline-offset: 3px;
}

.theme-toggle__icons {
  position: relative;
  width: 1.05rem;
  height: 1.05rem;
}

.theme-toggle__icon {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  transition: opacity 0.28s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.theme-toggle__icon--sun {
  opacity: 0;
  transform: rotate(-40deg) scale(0.6);
  color: #fbbf24;
}

.theme-toggle__icon--moon {
  opacity: 1;
  transform: rotate(0) scale(1);
  color: #334155;
}

html {
  color-scheme: light;
  scroll-padding-top: var(--site-nav-offset, 3.6rem);
}

html[data-theme="dark"] {
  color-scheme: dark;
}

html[data-theme="dark"] body {
  background:
    radial-gradient(ellipse 80% 50% at 100% -10%, rgba(56, 189, 248, 0.08), transparent 50%),
    radial-gradient(ellipse 60% 40% at 0% 100%, rgba(45, 212, 191, 0.05), transparent 45%),
    #0a0c10;
  color: #d5dbe6;
  transition: background 0.35s ease, color 0.35s ease;
}

html[data-theme="dark"] a {
  color: #7dd3fc;
}

html[data-theme="dark"] a:hover {
  color: #bae6fd;
}

html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] h4,
html[data-theme="dark"] h5,
html[data-theme="dark"] h6 {
  color: #eef2f7;
}

html[data-theme="dark"] #main {
  background: transparent;
}

html[data-theme="dark"] .site-nav {
  background: rgba(10, 12, 16, 0.84);
  border-bottom-color: rgba(148, 163, 184, 0.14);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
}

html[data-theme="dark"] .site-nav__brand {
  color: #f1f5f9;
}

html[data-theme="dark"] .site-nav__brand:hover {
  color: #7dd3fc;
}

html[data-theme="dark"] .site-nav__links a {
  color: #94a3b8;
}

html[data-theme="dark"] .site-nav__links a:hover {
  color: #e2e8f0;
  background: rgba(125, 211, 252, 0.1);
}

html[data-theme="dark"] .site-nav__burger {
  border-color: rgba(148, 163, 184, 0.22);
  background: rgba(30, 41, 59, 0.7);
}

html[data-theme="dark"] .site-nav__burger span {
  background: #e2e8f0;
}

html[data-theme="dark"] .page,
html[data-theme="dark"] .page__content,
html[data-theme="dark"] .page__inner-wrap {
  color: #d5dbe6;
}

html[data-theme="dark"] .page__title,
html[data-theme="dark"] .page__meta,
html[data-theme="dark"] .page__date {
  color: #e2e8f0;
}

html[data-theme="dark"] .sidebar {
  color: #c7d0dc;
}

html[data-theme="dark"] .author__avatar img {
  border-color: rgba(148, 163, 184, 0.28);
  background: #151b24;
  box-shadow: 0 0 0 4px rgba(125, 211, 252, 0.08);
}

html[data-theme="dark"] .author__name {
  color: #f1f5f9;
}

html[data-theme="dark"] .author__bio {
  color: #94a3b8;
}

html[data-theme="dark"] .author__urls {
  background: transparent;
}

html[data-theme="dark"] .author__urls a,
html[data-theme="dark"] .author__urls li,
html[data-theme="dark"] .sidebar-meta {
  color: #c7d0dc;
}

html[data-theme="dark"] .author__urls a:hover {
  color: #e2e8f0;
}

html[data-theme="dark"] .btn--inverse {
  background: rgba(30, 41, 59, 0.85);
  color: #e2e8f0;
  border-color: rgba(148, 163, 184, 0.35);
}

html[data-theme="dark"] .btn--inverse:hover {
  background: rgba(125, 211, 252, 0.14);
  color: #e0f2fe;
  border-color: rgba(125, 211, 252, 0.45);
}

.sidebar-social,
.sidebar-meta {
  display: flex !important;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  box-sizing: border-box;
  margin: 0;
  padding: 0.22rem 0;
  text-align: left;
}

.author__urls > li {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
}

.author__urls a.sidebar-social {
  display: flex !important;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0;
  padding-top: 0.22rem;
  padding-bottom: 0.22rem;
  padding-right: 0;
}

.sidebar-social i,
.sidebar-meta i {
  display: inline-flex;
  width: 1.55rem;
  height: 1.55rem;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: 0.4rem;
  font-size: 0.92rem;
  line-height: 1;
  text-align: center;
}

.sidebar-meta i {
  color: #64748b;
  background: rgba(148, 163, 184, 0.14);
}

.sidebar-social--email i {
  color: #64748b;
  background: rgba(148, 163, 184, 0.14);
}

.sidebar-social--github i {
  color: #24292f;
  background: rgba(36, 41, 47, 0.1);
}

.sidebar-social--scholar i {
  color: #4285f4;
  background: rgba(66, 133, 244, 0.12);
}

.sidebar-social--orcid i {
  color: #a6ce39;
  background: rgba(166, 206, 57, 0.16);
}

.sidebar-social--linkedin i {
  color: #0a66c2;
  background: rgba(10, 102, 194, 0.12);
}

.sidebar-social--researchgate i {
  color: #00d0af;
  background: rgba(0, 208, 175, 0.12);
}

.sidebar-social--link i {
  color: #2563eb;
  background: rgba(37, 99, 235, 0.1);
}

html[data-theme="dark"] .sidebar-meta i {
  color: #cbd5e1;
  background: rgba(148, 163, 184, 0.18);
}

html[data-theme="dark"] .sidebar-social--email i {
  color: #cbd5e1;
  background: rgba(148, 163, 184, 0.18);
}

html[data-theme="dark"] .sidebar-social--github i {
  color: #f8fafc;
  background: rgba(148, 163, 184, 0.2);
}

html[data-theme="dark"] .sidebar-social--scholar i {
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.2);
}

html[data-theme="dark"] .sidebar-social--orcid i {
  color: #d9f99d;
  background: rgba(166, 206, 57, 0.22);
}

html[data-theme="dark"] .sidebar-social--linkedin i {
  color: #93c5fd;
  background: rgba(14, 165, 233, 0.18);
}

html[data-theme="dark"] .sidebar-social--researchgate i {
  color: #5eead4;
  background: rgba(45, 212, 191, 0.18);
}

html[data-theme="dark"] .sidebar-social--link i {
  color: #7dd3fc;
  background: rgba(56, 189, 248, 0.16);
}

html[data-theme="dark"] .author__urls a.sidebar-social {
  padding: 0.28rem 0.2rem;
  border-radius: 0.45rem;
  transition: background 0.18s ease, color 0.18s ease;
}

html[data-theme="dark"] .author__urls a.sidebar-social:hover {
  background: rgba(148, 163, 184, 0.1);
  text-decoration: none;
}

html[data-theme="dark"] .page__footer {
  background: #07090d;
  border-top-color: rgba(148, 163, 184, 0.14);
  color: #8b97a8;
}

html[data-theme="dark"] .page__footer .fa {
  color: #8b97a8;
}

html[data-theme="dark"] table,
html[data-theme="dark"] .hoverTable {
  color: #d5dbe6;
}

html[data-theme="dark"] hr {
  border-color: rgba(148, 163, 184, 0.18);
}

html[data-theme="dark"] code {
  background: rgba(148, 163, 184, 0.12);
  color: #e2e8f0;
}

html[data-theme="dark"] pre {
  background: #12161e;
  border-color: rgba(148, 163, 184, 0.16);
}

html[data-theme="dark"] .theme-toggle {
  border-color: rgba(148, 163, 184, 0.22);
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.9));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  color: #e2e8f0;
}

html[data-theme="dark"] .theme-toggle__icon--sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

html[data-theme="dark"] .theme-toggle__icon--moon {
  opacity: 0;
  transform: rotate(40deg) scale(0.6);
}

@media (max-width: 860px) {
  .site-nav__burger {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav__right {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    padding: 0.85rem 1.15rem 1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.22);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  }

  html[data-theme="dark"] .site-nav__right {
    background: rgba(10, 12, 16, 0.96);
    border-bottom-color: rgba(148, 163, 184, 0.14);
  }

  .site-nav.is-open .site-nav__right {
    display: flex;
  }

  .site-nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .site-nav__links a {
    padding: 0.55rem 0.7rem;
  }

  .site-nav__right .theme-toggle {
    align-self: flex-end;
  }

  .site-nav {
    position: sticky;
  }

  .site-nav__inner {
    position: relative;
  }
}