:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #323232;
  --bg-card: #2a2a2a;
  --bg-glass: rgba(42, 42, 42, 0.95);
  --bg-overlay: #323232;
  
  --color-accent: #4a9eff;
  --color-accent-dark: #357abd;
  --color-accent-light: #6ab0ff;
  --accent-dim: rgba(74, 158, 255, 0.12);
  
  --color-gold: #f0883e;
  --color-gold-dark: #d2691e;
  
  --color-success: #3fb950;
  --color-danger: #f85149;
  --color-warning: #d29922;
  --color-purple: #a371f7;
  
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;
  
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(74, 158, 255, 0.4);
  
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-accent: 0 0 20px rgba(74, 158, 255, 0.2);
  --shadow-gold: 0 0 20px rgba(240, 136, 62, 0.2);
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f6f8fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f0f2f5;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.95);
  
  --color-accent: #0969da;
  --color-accent-dark: #0550ae;
  --color-accent-light: #218bff;
  --accent-dim: rgba(9, 105, 218, 0.08);
  
  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --text-muted: #9199a1;
  
  --border-subtle: rgba(31, 35, 40, 0.1);
  --border-accent: rgba(88, 166, 255, 0.5);
  
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-accent: 0 0 20px rgba(88, 166, 255, 0.15);
  --shadow-gold: 0 0 20px rgba(240, 136, 62, 0.15);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

*:active {
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(88, 166, 255, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(163, 113, 247, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(240, 246, 252, 0.03) 1px, transparent 0);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -1;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #30363d, #21262d);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #3d4349, #30363d);
}

::selection {
  background: rgba(88, 166, 255, 0.3);
  color: var(--text-primary);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fade-in-up {
  from { 
    opacity: 0; 
    transform: translateY(20px);
  }
  to { 
    opacity: 1; 
    transform: translateY(0);
  }
}

@keyframes scale-in {
  from { 
    opacity: 0; 
    transform: scale(0.95);
  }
  to { 
    opacity: 1; 
    transform: scale(1);
  }
}

@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes gradient-flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 24px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.card:hover::before {
  opacity: 1;
}

.title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 36px;
  position: relative;
  letter-spacing: 1px;
}

.title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  border-radius: 2px;
}

.title-section {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.title-section::before {
  content: '';
  width: 3px;
  height: 20px;
  background: var(--color-accent);
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: left 0.6s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: #161b22;
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #da3633);
  color: #fff;
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(248, 81, 73, 0.35);
}

.btn-success {
  background: linear-gradient(135deg, var(--color-success), #238636);
  color: #fff;
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(63, 185, 80, 0.35);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-accent);
  color: var(--color-accent);
}

.btn-outline:hover {
  background: rgba(88, 166, 255, 0.12);
  border-color: var(--color-accent);
}

.btn-purple {
  background: linear-gradient(135deg, #8957e5, var(--color-purple));
  color: #fff;
}

.btn-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(137, 87, 229, 0.35);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}

.btn-lg {
  padding: 15px 38px;
  font-size: 15px;
}

.btn-block {
  width: 100%;
}

input, textarea, select {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: all var(--transition-fast);
  margin-bottom: 14px;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%238b949e' viewBox='0 0 24 24'%3E%3Cpath d='M12 16l-4-4 1.41-1.41L12 13.17l6.59-6.59L20 9z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  cursor: pointer;
}

input[type="checkbox"], input[type="radio"] {
  width: auto;
  margin-right: 10px;
  margin-bottom: 0;
}

input[type="color"] {
  padding: 2px;
  cursor: pointer;
}

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

a:hover {
  color: var(--color-accent-light);
  text-decoration: underline;
}

.info-box {
  display: inline-block;
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.1), rgba(88, 166, 255, 0.05));
  color: var(--color-accent);
  padding: 16px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(88, 166, 255, 0.2);
  transition: all var(--transition-fast);
}

.info-box:hover {
  border-color: var(--color-accent);
}

.alert {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  font-weight: 500;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.alert-success {
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.25);
  color: var(--color-success);
}

.alert-danger {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.25);
  color: var(--color-danger);
}

.alert-warning {
  background: rgba(210, 153, 34, 0.1);
  border: 1px solid rgba(210, 153, 34, 0.25);
  color: var(--color-warning);
}

.vip-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  margin-left: 10px;
  vertical-align: middle;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

.vip-badge.vip {
  background: rgba(88, 166, 255, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(88, 166, 255, 0.35);
}

.vip-badge.svip {
  background: rgba(163, 113, 247, 0.15);
  color: var(--color-purple);
  border: 1px solid rgba(163, 113, 247, 0.35);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--bg-tertiary);
  padding: 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.stat-card .label {
  color: var(--text-secondary);
  font-size: 12px;
  margin-bottom: 10px;
  display: block;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-card .value {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
}

.stat-card.gold .value { color: var(--color-gold); }
.stat-card.red .value { color: var(--color-danger); }
.stat-card.green .value { color: var(--color-success); }

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.badge-primary {
  background: rgba(88, 166, 255, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(88, 166, 255, 0.3);
}

.badge-success {
  background: rgba(63, 185, 80, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(63, 185, 80, 0.3);
}

.badge-danger {
  background: rgba(248, 81, 73, 0.15);
  color: var(--color-danger);
  border: 1px solid rgba(248, 81, 73, 0.3);
}

.badge-warning {
  background: rgba(210, 153, 34, 0.15);
  color: var(--color-warning);
  border: 1px solid rgba(210, 153, 34, 0.3);
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
  margin: 20px 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }

.text-sm { font-size: 13px; }
.text-lg { font-size: 17px; }
.text-xl { font-size: 22px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }

header {
  background: var(--bg-secondary);
  backdrop-filter: blur(12px);
  padding: 12px 24px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

header.scrolled {
  background: rgba(22, 27, 34, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.nav > div {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  letter-spacing: 2px;
  transition: transform var(--transition-fast);
  background: linear-gradient(135deg, var(--color-accent), #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo:hover {
  transform: scale(1.05);
}

.user-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: bold;
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 15px rgba(88, 166, 255, 0.3);
}

.user-icon:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 20px rgba(88, 166, 255, 0.4);
}

.menu {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.menu-container {
  display: flex;
  align-items: center;
  gap: 14px;
}

.menu a {
  color: var(--text-secondary);
  font-size: 13px;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 26px;
  white-space: nowrap;
  background: rgba(240, 246, 252, 0.03);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.menu a:hover {
  color: var(--text-primary);
  background: rgba(88, 166, 255, 0.1);
  border-color: rgba(88, 166, 255, 0.3);
}

.menu a.vip-link {
  background: rgba(163, 113, 247, 0.15);
  color: var(--color-purple);
  border: 1px solid rgba(163, 113, 247, 0.35);
}

.menu a.recharge-link {
  background: rgba(240, 136, 62, 0.15);
  color: var(--color-gold);
  border: 1px solid rgba(240, 136, 62, 0.35);
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 38px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.mobile-menu-toggle:hover {
  border-color: var(--color-accent);
}

.mobile-menu-toggle::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  box-shadow: 0 5px 0 var(--text-secondary), 0 -5px 0 var(--text-secondary);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle.active::before {
  transform: rotate(45deg);
  box-shadow: none;
}

.mobile-menu-toggle.active::after {
  content: '';
  position: absolute;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  transform: rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: -300px;
  width: 280px;
  height: 100vh;
  background: #ffffff;
  backdrop-filter: blur(20px);
  border-right: 1px solid #e0e0e0;
  z-index: 9998;
  padding: 70px 16px 30px;
  overflow-y: auto;
  transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
  display: block;
  left: 0;
}

.mobile-menu a {
  display: block;
  padding: 14px 18px;
  color: #000000 !important;
  text-decoration: none;
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  transition: all var(--transition-fast);
  font-size: 16px;
  font-weight: 500;
}

.mobile-menu a:hover {
  color: var(--text-primary);
  background: rgba(88, 166, 255, 0.12);
}

.mobile-menu a.vip-link {
  background: rgba(163, 113, 247, 0.12);
  color: var(--color-purple);
}

.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9997;
  transition: opacity 0.3s ease;
}

.menu-overlay.active {
  display: block;
}

.hero {
  padding: 90px 0 60px;
  text-align: center;
  animation: fade-in-up 0.6s ease;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--text-primary), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 17px;
  color: var(--text-secondary);
  letter-spacing: 2px;
}

.hero .subtitle {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 6px;
  margin-top: 14px;
  text-transform: uppercase;
}

.section {
  padding: 50px 0;
  animation: fade-in-up 0.6s ease;
}

.section:nth-child(odd) {
  background: rgba(240, 246, 252, 0.02);
}

[data-theme="light"] .section:nth-child(odd) {
  background: rgba(88, 166, 255, 0.03);
}

footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border-subtle);
  margin-top: 60px;
  background: var(--bg-secondary);
}

footer::before {
  content: '';
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  body {
    padding-top: 70px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
  }
  
  .container {
    padding: 0 16px;
  }
  
  header {
    padding: 10px 16px;
  }
  
  .nav {
    gap: 8px;
  }
  
  .logo-area {
    gap: 8px;
  }
  
  .logo {
    font-size: 20px;
    letter-spacing: 1px;
  }
  
  .user-icon {
    width: 38px;
    height: 38px;
    font-size: 16px;
  }
  
  .theme-toggle-btn {
    width: 44px;
    height: 44px;
    font-size: 18px;
  }
  
  .theme-toggle-btn svg {
    width: 22px;
    height: 22px;
  }
  
  .theme-toggle-btn .tooltip {
    position: fixed;
    left: 50%;
    top: auto;
    bottom: 80px;
    transform: translateX(-50%) translateY(0);
  }
  
  .theme-toggle-btn .tooltip::after {
    border-right-color: transparent;
    border-top-color: #323232;
    top: 100%;
    right: 50%;
    transform: translateX(50%);
  }
  
  .theme-dropdown {
    right: 0;
    top: 48px;
    min-width: 140px;
  }
  
  .theme-option {
    padding: 14px 16px;
    font-size: 15px;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .menu {
    display: none;
  }
  
  .mobile-menu a {
    padding: 16px 18px;
    font-size: 15px;
  }
  
  .hero {
    padding: 60px 0 40px;
  }
  
  .hero h1 {
    font-size: 28px;
    letter-spacing: 2px;
    margin-bottom: 16px;
  }
  
  .hero p {
    font-size: 14px;
    margin-bottom: 8px;
  }
  
  .hero .subtitle {
    font-size: 11px;
    letter-spacing: 3px;
  }
  
  .section {
    padding: 36px 0;
  }
  
  .card {
    padding: 22px;
  }
  
  .title {
    font-size: 22px;
    margin-bottom: 24px;
  }
  
  .btn {
    padding: 14px 26px;
    font-size: 15px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .stat-card {
    padding: 18px;
  }
  
  .stat-card .value {
    font-size: 24px;
  }
  
  footer {
    padding: 30px 16px;
  }
  
  input, textarea, select {
    min-height: 48px;
    font-size: 16px;
    padding: 14px 16px;
  }
  
  .theme-toggle-btn, .user-icon, .mobile-menu-toggle {
    min-height: 44px;
    min-width: 44px;
  }
}

@media (max-width: 480px) {
  body {
    padding-top: 68px;
  }
  
  .hero h1 {
    font-size: 24px;
    letter-spacing: 1px;
  }
  
  .hero p {
    font-size: 13px;
  }
  
  .card {
    padding: 18px;
  }
  
  .mobile-menu {
    width: 80%;
    max-width: 280px;
    left: -80%;
  }
  
  .mobile-menu.active {
    transform: translateX(80%);
  }
  
  .title {
    font-size: 20px;
  }
  
  .btn {
    padding: 12px 22px;
    font-size: 14px;
  }
  
  .nav {
    flex-wrap: nowrap;
  }
  
  .logo-area {
    flex-shrink: 0;
  }
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  padding: 0;
  position: relative;
}

.theme-toggle-btn:hover {
  border-color: var(--color-accent);
  background: rgba(88, 166, 255, 0.1);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle-btn:hover svg {
  color: var(--color-accent);
  transform: scale(1.1);
}

.theme-toggle-btn .tooltip {
  position: absolute;
  top: 50%;
  left: calc(100% + 10px);
  transform: translateY(-50%);
  background: #323232;
  color: #ffffff;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  border: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: 1000;
}

.theme-toggle-btn:hover .tooltip,
.theme-toggle-btn:focus-visible .tooltip {
  opacity: 1;
  visibility: visible;
}

.theme-toggle-btn .tooltip::after {
  content: '';
  position: absolute;
  right: 100%;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-right-color: #323232;
}

.theme-switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.theme-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
}

.icon-btn {
  position: relative;
  overflow: hidden;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.icon-btn:hover {
  color: var(--text-primary);
  background: var(--accent-dim);
}

.icon-btn:active {
  background: rgba(88, 166, 255, 0.18);
}

.icon-btn svg {
  position: relative;
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.icon-btn.active {
  color: var(--color-accent);
  background: var(--accent-dim);
}

[data-theme="light"] #btn-light,
[data-theme="dark"] #btn-dark,
[data-theme="system"] #btn-system {
  color: var(--color-accent);
  background: var(--accent-dim);
}



[data-theme="light"] body::before {
  background: 
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(88, 166, 255, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(240, 136, 62, 0.08) 0%, transparent 50%);
}

[data-theme="light"] body::after {
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(31, 35, 40, 0.04) 1px, transparent 0);
}

[data-theme="light"] header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #d1d9e0, #e1e4e8);
  border: 2px solid var(--bg-secondary);
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #c1c9d0, #d1d9e0);
}

[data-theme="light"] select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23656d76' viewBox='0 0 24 24'%3E%3Cpath d='M12 16l-4-4 1.41-1.41L12 13.17l6.59-6.59L20 9z'/%3E%3C/svg%3E");
}