.loading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent));
  transform: translateX(-100%);
  z-index: 10000;
  opacity: 0;
  transition: opacity var(--transition-fast) var(--ease-out-cubic);
}

.loading-progress.active {
  opacity: 1;
  animation: progressBar 1.5s var(--ease-out-cubic) infinite;
}

.site-header {
  position: sticky;
  top: 20px;
  z-index: 10;
  margin: 24px auto 32px;
  width: min(var(--content-max-width), calc(100% - var(--page-gutter-2x)));
  border-radius: 24px;
  animation: themeEnter 0.86s var(--ease-enter, var(--ease-out-cubic)) both;
  transition:
    transform var(--transition-base),
    background-color var(--transition-base),
    border-color var(--transition-base);
}

.site-header.scrolled {
  transform: translate3d(0, -6px, 0) scale(0.98);
  backdrop-filter: blur(26px) saturate(1.6);
  -webkit-backdrop-filter: blur(26px) saturate(1.6);
}

@media (hover: none) and (pointer: coarse) {
  .site-header.scrolled {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: "Playfair Display", serif;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.6px;
}

.logo-text {
  font-weight: 800;
  letter-spacing: 0.4px;
}

.logo-mark {
  color: var(--accent-strong);
  font-size: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
  color: var(--muted);
}

.nav a {
  position: relative;
  padding: 10px 16px;
  border-radius: 12px;
  transition:
    transform var(--transition-smooth) var(--ease-out-cubic),
    background-color var(--transition-smooth) var(--ease-out-cubic),
    color var(--transition-smooth) var(--ease-out-cubic);
}

.nav a::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(
    circle,
    rgba(125, 211, 252, 0.15) 0%,
    transparent 70%
  );
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition:
    width var(--transition-smooth) var(--ease-out-cubic),
    height var(--transition-smooth) var(--ease-out-cubic),
    opacity var(--transition-smooth) var(--ease-out-cubic);
  opacity: 0;
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-smooth) var(--ease-out-cubic);
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-hover);
}

.nav a:hover::before {
  width: 120%;
  height: 120%;
  opacity: 1;
}

.nav a:hover::after {
  width: 70%;
}

.nav a:active {
  transform: translateY(0) scale(1);
  transition-duration: 0.1s;
}

body.theme-light .nav a:hover {
  background: rgba(15, 23, 42, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition:
    transform var(--transition-base) var(--ease-out-cubic),
    background-color var(--transition-base) var(--ease-out-cubic),
    border-color var(--transition-base) var(--ease-out-cubic);
  display: flex;
  align-items: center;
  padding: 2px;
}

.theme-toggle::before {
  content: "🌙";
  position: absolute;
  left: 3px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  opacity: 0.8;
  transition: opacity var(--transition-base) var(--ease-out-cubic);
}

.theme-toggle::after {
  content: "☀️";
  position: absolute;
  right: 3px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  opacity: 0.6;
  transition: opacity var(--transition-base) var(--ease-out-cubic);
}

.theme-toggle .toggle-handle {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  transition: transform var(--transition-base) var(--ease-out-cubic);
  position: relative;
  z-index: 1;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

.theme-toggle:hover .toggle-handle {
  transform: scale(1.1);
}

.theme-toggle.active {
  background: rgba(56, 189, 248, 0.2);
  border-color: rgba(56, 189, 248, 0.4);
}

.theme-toggle.active .toggle-handle {
  transform: translateX(20px);
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
}

.theme-toggle.active::before {
  opacity: 0.6;
}

.theme-toggle.active::after {
  opacity: 0.9;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  transition:
    transform var(--transition-base) var(--ease-out-cubic),
    box-shadow var(--transition-base) var(--ease-out-cubic),
    background-color var(--transition-base) var(--ease-out-cubic),
    border-color var(--transition-base) var(--ease-out-cubic),
    color var(--transition-base) var(--ease-out-cubic);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  isolation: isolate;
}

.btn.primary {
  background: linear-gradient(
    135deg,
    rgba(56, 189, 248, 0.95),
    rgba(14, 165, 233, 0.7)
  );
  color: #0b1020;
  box-shadow: var(--shadow-accent);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.btn.ghost {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
}

body.theme-light .btn.ghost {
  border-color: rgba(15, 23, 42, 0.25);
  color: var(--light-text);
  background: rgba(15, 23, 42, 0.08);
}

.btn:hover {
  transform: var(--animation-translate-up-md) var(--animation-scale-sm);
  box-shadow: var(--shadow-accent-lg);
  border-color: rgba(56, 189, 248, 0.5);
}

.btn:hover::before {
  width: 120%;
  height: 120%;
  opacity: 1;
}

.btn:active {
  transform: var(--animation-translate-down-sm) scale(0.98);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-instant) var(--ease-out-quad),
    box-shadow var(--transition-instant) var(--ease-out-quad);
}

.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.15) 0%,
    transparent 60%
  );
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition:
    width var(--transition-smooth) var(--ease-out-cubic),
    height var(--transition-smooth) var(--ease-out-cubic),
    opacity var(--transition-smooth) var(--ease-out-cubic);
  opacity: 0;
  pointer-events: none;
  z-index: -1;
}

.btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(
    circle,
    rgba(125, 211, 252, 0.25) 0%,
    transparent 70%
  );
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition:
    width 0.35s ease-out,
    height 0.35s ease-out,
    opacity 0.35s ease-out;
  opacity: 0;
  pointer-events: none;
  z-index: -1;
}

.btn:hover::before {
  width: 100%;
  height: 100%;
  opacity: 1;
}

.btn:active::after {
  width: 60px;
  height: 60px;
  opacity: 1;
  transition:
    width 0.2s ease-out,
    height 0.2s ease-out,
    opacity 0.1s;
}

.hero {
  padding: 64px 48px;
  border-radius: 32px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 20% 20%,
    rgba(125, 211, 252, 0.2),
    transparent 60%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 620px;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 4rem);
  font-family: "Playfair Display", serif;
  margin-bottom: 16px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.post-header h1 {
  font-size: clamp(2rem, 3vw, 3rem);
  margin-bottom: 12px;
}

.post-header .post-meta {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.post-header .post-meta a {
  color: var(--accent-light);
}

.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(12px) saturate(1.8);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-modal) var(--ease-out-cubic);
  will-change: opacity;
}

@media (hover: none) and (pointer: coarse) {
  .search-overlay {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(10, 15, 26, 0.92);
  }
}

body.theme-light .search-overlay {
  background: rgba(248, 250, 252, 0);
}

.search-overlay.is-visible {
  opacity: 1;
}

.search-dialog {
  width: min(90%, 680px);
  max-height: 75vh;
  border-radius: 20px;
  padding: 0;
  background: var(--bg-1);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-glass);
  transform: scale(0.95) translateY(-20px);
  opacity: 0;
  transition:
    transform var(--transition-modal) var(--ease-out-back),
    opacity var(--transition-modal) var(--ease-out-cubic);
  will-change: transform, opacity;
  overflow: hidden;
}

body.theme-light .search-dialog {
  background: var(--light-bg-1);
  border-color: var(--light-glass-border);
  box-shadow: var(--light-shadow-glass);
}

.search-overlay.is-visible .search-dialog {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.search-input {
  padding: 28px;
}

body.theme-light .search-input {
  background: var(--light-bg-1);
}

.search-input input {
  width: 100%;
  padding: 18px 24px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 2px solid var(--glass-border);
  color: var(--text);
  font-size: 1.1rem;
  transition:
    border-color var(--transition-base) var(--ease-out-cubic),
    box-shadow var(--transition-base) var(--ease-out-cubic),
    background-color var(--transition-base) var(--ease-out-cubic),
    transform var(--transition-base) var(--ease-out-cubic),
    color var(--transition-base) var(--ease-out-cubic);
  font-weight: 500;
}

body.theme-light .search-input input {
  background: var(--light-bg-2);
  border-color: var(--light-glass-border);
  color: var(--light-text);
}

.search-input input::placeholder {
  color: var(--text-dim);
  font-weight: normal;
}

body.theme-light .search-input input::placeholder {
  color: var(--light-text-dim);
}

.search-input input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
  background: var(--bg-3);
  transform: translateY(-2px);
}

body.theme-light .search-input input:focus {
  border-color: var(--light-accent);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  background: var(--light-bg-3);
}

.search-results {
  max-height: 350px;
  overflow-y: auto;
  padding: 0 28px 28px;
  background: var(--bg-1);
  scrollbar-width: none;
}

.search-results::-webkit-scrollbar {
  width: 0;
  height: 0;
}

body.theme-light .search-results {
  background: var(--light-bg-1);
}

.search-empty {
  text-align: center;
  padding: 56px 28px;
  color: var(--text-dim);
  font-size: 1rem;
  font-style: italic;
}

body.theme-light .search-empty {
  color: var(--light-text-dim);
}

.search-item {
  display: block;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 12px;
  background: var(--bg-2);
  border: 1px solid var(--glass-border);
  transition:
    transform var(--transition-base) var(--ease-out-cubic),
    background-color var(--transition-base) var(--ease-out-cubic),
    border-color var(--transition-base) var(--ease-out-cubic),
    box-shadow var(--transition-base) var(--ease-out-cubic);
  cursor: pointer;
}

body.theme-light .search-item {
  background: var(--light-bg-2);
  border-color: var(--light-glass-border);
}

.search-item:hover {
  background: var(--bg-3);
  border-color: var(--accent-light);
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-sm);
}

body.theme-light .search-item:hover {
  background: var(--light-bg-3);
  border-color: var(--light-accent-light);
}

.search-item-title {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.3;
}

body.theme-light .search-item-title {
  color: var(--light-text);
}

.search-item-excerpt {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
  opacity: 0.8;
}

body.theme-light .search-item-excerpt {
  color: var(--light-text-muted);
}

body.search-open {
  position: fixed;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body.search-open .site-wrapper,
body.search-open .site-footer {
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

body.search-open .site-header {
  transform: none !important;
  transition: none !important;
  opacity: 0;
  pointer-events: none;
}

body.search-open .header-inner {
  transform: none !important;
  transition: none !important;
}

.search-overlay[hidden] {
  display: none;
}