/* 🚀 2025 CUTTING-EDGE DESIGN - HIGH PERFORMANCE MODE */
/* CSS Variables for Dark/Light Theme */
:root {
  color-scheme: light dark;
  
  /* 🎨 Dark theme - Ultra-modern with advanced graphics */
  --bg-primary: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #0f0a1f 100%);
  --bg-secondary: rgba(15, 17, 24, 0.85);
  --bg-card: linear-gradient(145deg, rgba(0, 212, 255, 0.08) 0%, rgba(157, 78, 221, 0.08) 50%, rgba(255, 0, 110, 0.05) 100%);
  --bg-hover: linear-gradient(145deg, rgba(0, 212, 255, 0.18) 0%, rgba(157, 78, 221, 0.18) 50%, rgba(255, 0, 110, 0.12) 100%);
  --border-primary: rgba(30, 34, 48, 0.8);
  --border-secondary: rgba(0, 212, 255, 0.35);
  --border-card: linear-gradient(145deg, rgba(0, 212, 255, 0.25), rgba(157, 78, 221, 0.25), rgba(255, 0, 110, 0.2));
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  /* 🌈 2025 Accent Colors */
  --accent-cyan: #00f0ff;
  --accent-purple: #a855f7;
  --accent-yellow: #fbbf24;
  --accent-red: #f43f5e;
  --accent-green: #10b981;
  --accent-pink: #ec4899;
  --accent-blue: #3b82f6;
  --accent-orange: #f97316;
  
  /* 🎭 Glassmorphism & Effects */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --nav-bg: linear-gradient(145deg, rgba(21, 24, 38, 0.95) 0%, rgba(27, 32, 49, 0.95) 100%);
  --nav-hover: linear-gradient(145deg, rgba(0, 212, 255, 0.2) 0%, rgba(157, 78, 221, 0.2) 100%);
  
  /* ✨ Advanced Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15), 0 2px 8px rgba(0, 212, 255, 0.1);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3), 0 4px 20px rgba(0, 212, 255, 0.15);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.4), 0 8px 30px rgba(157, 78, 221, 0.2);
  --glow-cyan: 0 0 30px rgba(0, 240, 255, 0.6), 0 0 60px rgba(0, 240, 255, 0.3);
  --glow-purple: 0 0 30px rgba(168, 85, 247, 0.6), 0 0 60px rgba(168, 85, 247, 0.3);
  --glow-rainbow: 0 0 40px rgba(0, 240, 255, 0.4), 0 0 80px rgba(168, 85, 247, 0.3), 0 0 120px rgba(236, 72, 153, 0.2);
  
  /* 🎯 Backdrop Filters (2025 Standard) */
  --blur-sm: blur(8px);
  --blur-md: blur(16px);
  --blur-lg: blur(24px);
  --blur-xl: blur(40px);
}

/* ☀️ Light theme - Clean 2025 aesthetic */
[data-theme="light"] {
  --bg-primary: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 50%, #f1f5f9 100%);
  --bg-secondary: rgba(255, 255, 255, 0.9);
  --bg-card: linear-gradient(145deg, rgba(59, 130, 246, 0.04) 0%, rgba(168, 85, 247, 0.04) 50%, rgba(236, 72, 153, 0.03) 100%);
  --bg-hover: linear-gradient(145deg, rgba(59, 130, 246, 0.1) 0%, rgba(168, 85, 247, 0.1) 50%, rgba(236, 72, 153, 0.08) 100%);
  --border-primary: rgba(226, 232, 240, 0.8);
  --border-secondary: rgba(59, 130, 246, 0.3);
  --border-card: linear-gradient(145deg, rgba(59, 130, 246, 0.25), rgba(168, 85, 247, 0.25), rgba(236, 72, 153, 0.2));
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent-cyan: #0ea5e9;
  --accent-purple: #9333ea;
  --accent-yellow: #f59e0b;
  --accent-red: #dc2626;
  --accent-green: #059669;
  --accent-pink: #db2777;
  --accent-blue: #2563eb;
  --accent-orange: #ea580c;
  
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.8);
  --nav-bg: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.95) 100%);
  --nav-hover: linear-gradient(145deg, rgba(59, 130, 246, 0.12) 0%, rgba(168, 85, 247, 0.12) 100%);
  
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 3px 12px rgba(0, 0, 0, 0.08), 0 1px 6px rgba(59, 130, 246, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12), 0 3px 16px rgba(59, 130, 246, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15), 0 6px 24px rgba(168, 85, 247, 0.12);
  --glow-cyan: 0 0 24px rgba(14, 165, 233, 0.4), 0 0 48px rgba(14, 165, 233, 0.2);
  --glow-purple: 0 0 24px rgba(147, 51, 234, 0.4), 0 0 48px rgba(147, 51, 234, 0.2);
  --glow-rainbow: 0 0 32px rgba(14, 165, 233, 0.3), 0 0 64px rgba(147, 51, 234, 0.2), 0 0 96px rgba(219, 39, 119, 0.15);
}

/* ⚡ LOW PERFORMANCE MODE - Fast & Flat Design (Dark Theme) */
.low-performance {
  /* Override all fancy variables with flat colors */
  --bg-primary: #111;
  --bg-secondary: #0f1118;
  --bg-card: rgba(255,255,255,0.04);
  --bg-hover: rgba(255,255,255,0.08);
  --border-primary: #1e2230;
  --border-secondary: #2a3042;
  --border-card: rgba(255,255,255,0.08);
  --glass-bg: rgba(255,255,255,0.03);
  --glass-border: rgba(255,255,255,0.06);
  --nav-bg: #151826;
  --nav-hover: #1b2031;
  
  /* Minimal shadows */
  --shadow-sm: none;
  --shadow-md: 0 2px 4px rgba(0,0,0,0.2);
  --shadow-lg: 0 4px 8px rgba(0,0,0,0.25);
  --shadow-xl: 0 6px 12px rgba(0,0,0,0.3);
  --glow-cyan: none;
  --glow-purple: none;
  --glow-rainbow: none;
  
  /* No blur */
  --blur-sm: none;
  --blur-md: none;
  --blur-lg: none;
  --blur-xl: none;
}

/* ☀️ LOW PERFORMANCE MODE - Light Theme Override */
[data-theme="light"] .low-performance {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-hover: #e8e8e8;
  --border-primary: #d0d0d0;
  --border-secondary: #c0c0c0;
  --border-card: #e0e0e0;
  --glass-bg: #fafafa;
  --glass-border: #e5e5e5;
  --nav-bg: #ffffff;
  --nav-hover: #f0f0f0;
  
  /* Light theme text colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Light theme accents */
  --accent-cyan: #0ea5e9;
  --accent-purple: #9333ea;
  --accent-yellow: #f59e0b;
  --accent-red: #dc2626;
  --accent-green: #059669;
  --accent-pink: #db2777;
  --accent-blue: #2563eb;
  --accent-orange: #ea580c;
}

/* � SMOOTH PAGE LOAD ANIMATIONS */
@keyframes pageLoad {
  0% { 
    opacity: 0; 
    transform: translateY(20px);
  }
  100% { 
    opacity: 1; 
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(30px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

/* Apply page load animation to containers */
body:not(.low-performance) .container {
  animation: pageLoad 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

body:not(.low-performance) .app-header {
  animation: slideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.1s both;
}

body:not(.low-performance) .card {
  animation: slideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) both;
  animation-delay: calc(var(--card-index, 0) * 0.05s);
}

body:not(.low-performance) .site-header {
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* 🎨 CUSTOM SCROLLBAR */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 10px;
  border: 2px solid var(--bg-secondary);
  transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent-purple), var(--accent-pink));
  box-shadow: 0 0 10px var(--accent-cyan);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--accent-cyan) var(--bg-secondary);
}

/* Low performance - simple scrollbar */
.low-performance ::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  box-shadow: none;
}

.low-performance ::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* �🎬 ULTRA-SMOOTH ANIMATIONS - High Performance Only */
body:not(.low-performance) * {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body:not(.low-performance) .card,
body:not(.low-performance) .tool-card {
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); /* Bouncy effect */
}

body:not(.low-performance) .theme-toggle,
body:not(.low-performance) .nav-link,
body:not(.low-performance) .copDb {
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Elastic */
}

/* ⚡ LOW PERFORMANCE - NO TRANSITIONS */
.low-performance,
.low-performance * {
  transition: none !important;
  animation: none !important;
  transform: none !important;
}

/* 🎨 HIGH PERFORMANCE - Advanced Theme Toggle with 3D */
body:not(.low-performance) .theme-toggle {
  cursor: pointer;
  font-size: 20px;
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border: 2px solid var(--glass-border);
  padding: 10px 16px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .theme-toggle::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(0, 240, 255, 0.1), transparent);
  transform: rotate(45deg);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

body:not(.low-performance) .theme-toggle:hover {
  background: var(--nav-hover);
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
  transform: translateY(-3px) scale(1.05);
}

body:not(.low-performance) .theme-toggle:active {
  transform: translateY(-1px) scale(1.02);
}

body:not(.low-performance) .theme-toggle .theme-icon {
  font-size: 22px;
  filter: drop-shadow(0 0 12px currentColor);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-4px) rotate(5deg); }
}

/* ⚡ LOW PERFORMANCE - Simple Theme Toggle */
.low-performance .theme-toggle {
  cursor: pointer;
  font-size: 20px;
  background: var(--nav-bg);
  border: 1px solid var(--border-secondary);
  padding: 6px 10px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
}

.low-performance .theme-toggle:hover {
  background: var(--nav-hover);
}

.low-performance .theme-toggle::before {
  display: none;
}

.low-performance .theme-toggle .theme-icon {
  font-size: 18px;
  filter: none;
}


/* 🎨 HIGH PERFORMANCE - Glassmorphism Header with Backdrop Blur */
body:not(.low-performance) .site-header { 
  position: sticky; 
  top: 0; 
  z-index: 1000; 
  background: var(--glass-bg);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border-bottom: 2px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
}

/* ⚡ LOW PERFORMANCE - Solid Header */
.low-performance .site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  backdrop-filter: none;
}

.site-header-inner { 
  max-width: 1100px; 
  margin: 0 auto; 
  padding: 12px 20px; 
  display: flex; 
  align-items: center; 
  gap: 20px; 
  justify-content: space-between; 
}

.brand-row { 
  display: flex; 
  align-items: center; 
  gap: 12px; 
}

/* 🎨 HIGH PERFORMANCE - Animated Gradient Badge */
body:not(.low-performance) .brand-badge { 
  font-weight: 700; 
  font-size: 13px; 
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
  background-size: 200% 200%;
  animation: gradientFlow 5s ease infinite;
  color: #fff;
  padding: 5px 12px;
  border-radius: 14px;
  box-shadow: var(--glow-rainbow);
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .brand-badge::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shine 3s infinite;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes shine {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

/* ⚡ LOW PERFORMANCE - Simple Badge */
.low-performance .brand-badge {
  font-weight: 700;
  font-size: 13px;
  background: var(--accent-yellow);
  color: #111;
  padding: 3px 8px;
  border-radius: 12px;
}

.low-performance .brand-badge::before {
  display: none;
}

/* 🎨 HIGH PERFORMANCE - Ultra Gradient Title with Text Shadow */
body:not(.low-performance) .title-gradient { 
  font-weight: 800; 
  font-size: 24px; 
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 30%, var(--accent-pink) 60%, var(--accent-orange) 100%);
  background-size: 300% 300%;
  animation: gradientFlow 8s ease infinite;
  -webkit-background-clip: text; 
  -webkit-text-fill-color: transparent; 
  background-clip: text;
  filter: drop-shadow(0 0 16px rgba(0, 240, 255, 0.6)) drop-shadow(0 0 32px rgba(168, 85, 247, 0.4));
  position: relative;
}

/* ⚡ LOW PERFORMANCE - Simple Gradient Title */
.low-performance .title-gradient {
  font-weight: 800;
  font-size: 18px;
  color: var(--accent-cyan);
  filter: none;
}


/* 🎨 HIGH PERFORMANCE - 3D Interactive Navigation Links */
body:not(.low-performance) .site-nav { 
  display: flex; 
  gap: 12px; 
  align-items: center; 
}

body:not(.low-performance) .site-nav .nav-link { 
  color: var(--text-secondary); 
  text-decoration: none; 
  font-size: 14px; 
  font-weight: 600;
  padding: 10px 16px; 
  border-radius: 14px; 
  border: 2px solid transparent;
  background: var(--glass-bg);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .site-nav .nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.2), transparent);
  transition: left 0.5s;
}

body:not(.low-performance) .site-nav .nav-link:hover::before {
  left: 100%;
}

body:not(.low-performance) .site-nav button.nav-link { 
  cursor: pointer; 
  font-family: inherit; 
}

body:not(.low-performance) .site-nav .nav-link[aria-current="page"],
body:not(.low-performance) .site-nav .nav-link:hover { 
  color: var(--accent-cyan);
  background: var(--nav-hover);
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
  transform: translateY(-3px) scale(1.05);
}

body:not(.low-performance) .site-nav .nav-link:active {
  transform: translateY(-1px) scale(1.02);
}

/* ⚡ LOW PERFORMANCE - Simple Navigation */
.low-performance .site-nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.low-performance .site-nav .nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-secondary);
  background: var(--nav-bg);
  backdrop-filter: none;
}

.low-performance .site-nav .nav-link::before {
  display: none;
}

.low-performance .site-nav button.nav-link {
  cursor: pointer;
  font-family: inherit;
}

.low-performance .site-nav .nav-link[aria-current="page"],
.low-performance .site-nav .nav-link:hover {
  color: var(--text-primary);
  background: var(--nav-hover);
}

/* 🎨 HIGH PERFORMANCE - Pulsing RAM Monitor with Particles */
body:not(.low-performance) .ram-monitor { 
  color: var(--accent-cyan); 
  font-size: 13px; 
  font-weight: 700; 
  padding: 10px 16px; 
  border-radius: 14px; 
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.15), rgba(168, 85, 247, 0.15));
  border: 2px solid var(--accent-cyan);
  white-space: nowrap;
  box-shadow: var(--glow-cyan);
  animation: pulse 3s ease-in-out infinite, rainbow-border 6s linear infinite;
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .ram-monitor::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.3) 0%, transparent 70%);
  animation: particle-flow 4s linear infinite;
}

@keyframes pulse {
  0%, 100% { 
    box-shadow: var(--glow-cyan);
    transform: scale(1);
  }
  50% { 
    box-shadow: var(--glow-purple);
    transform: scale(1.03);
  }
}

@keyframes rainbow-border {
  0%, 100% { border-color: var(--accent-cyan); }
  33% { border-color: var(--accent-purple); }
  66% { border-color: var(--accent-pink); }
}

@keyframes particle-flow {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ⚡ LOW PERFORMANCE - Simple RAM Monitor */
.low-performance .ram-monitor {
  color: var(--accent-cyan);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  white-space: nowrap;
}

.low-performance .ram-monitor::after {
  display: none;
}

/* 🌐 Global HTML & Body Theming */
html {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* 🎨 Base Body Styles - Works for ALL modes and themes */
body { 
  background: var(--bg-primary);
  color: var(--text-primary); 
  text-align: center; 
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}

/* 🎨 HIGH PERFORMANCE - Animated Gradient Background with Particles */
body:not(.low-performance)::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
  animation: backgroundPulse 10s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes backgroundPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ⚡ LOW PERFORMANCE - No particles effect */
.low-performance::before {
  display: none;
}

/* Layout container with better spacing */
.container { 
  max-width: 1100px; 
  margin: 0 auto; 
  padding: 16px 20px;
  position: relative;
  z-index: 1;
}

/* Enhanced app header */
.app-header { 
  margin: 12px auto 16px; 
  position: sticky; 
  top: 0; 
  background: var(--nav-bg); 
  z-index: 5;
  border-radius: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

/* Enhanced header bar */
.header-bar { 
  display: grid; 
  grid-template-columns: 1fr auto 1fr; 
  align-items: center; 
  gap: 16px;
  padding: 12px 20px;
}
.header-left { 
  text-align: left;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Header Logo Styling */
.header-logo {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body:not(.low-performance) .header-logo:hover {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--glow-cyan);
}

.low-performance .header-logo {
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.low-performance .header-logo:hover {
  transform: none;
}

.header-center { 
  text-align: center;
  flex: 1;
}

.subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  font-weight: 500;
}
.header-right { 
  text-align: right; 
  display: flex; 
  justify-content: flex-end; 
  align-items: center; 
}

/* Enhanced brand elements */
.brand { 
  display: flex; 
  align-items: baseline; 
  gap: 10px; 
}
.brand-title { 
  font-size: 24px; 
  font-weight: 800; 
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.badge { 
  font-size: 12px; 
  background: linear-gradient(135deg, var(--accent-yellow), var(--accent-red));
  color: #111; 
  border-radius: 12px; 
  padding: 4px 10px; 
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(255, 213, 77, 0.4);
}
.byline { 
  font-size: 12px; 
  color: var(--text-muted); 
  margin-top: 4px; 
}

/* Enhanced clock and greeting */
.clock { 
  font-family: "Arial Black", Gadget, sans-serif; 
  font-size: 16px; 
  background: linear-gradient(135deg, var(--accent-red), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 10px rgba(255, 51, 102, 0.5));
}
.greeting { 
  font-size: 13px; 
  color: var(--text-secondary); 
  margin-top: 2px;
  font-weight: 500;
}

/* Enhanced footer with better visual hierarchy */
/* 🎨 Enhanced Professional Footer */
.app-footer { 
  margin: 48px auto 0; 
  background: var(--nav-bg);
  border-top: 3px solid var(--border-secondary);
  padding: 0;
  box-shadow: var(--shadow-xl);
  border-radius: 20px 20px 0 0;
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .app-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink), var(--accent-cyan));
  background-size: 200% 100%;
  animation: gradientFlow 5s linear infinite;
}

.footer-container { 
  max-width: 1100px; 
  margin: 0 auto; 
  padding: 40px 24px 0; 
}

.footer-content { 
  display: grid; 
  grid-template-columns: 1.5fr 1fr 1fr 1fr; 
  gap: 32px; 
  margin-bottom: 32px; 
}

.footer-brand {
  grid-column: span 1;
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-section-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-secondary);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-title { 
  font-size: 22px; 
  font-weight: 800; 
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 12px 0; 
  display: flex; 
  align-items: center; 
  gap: 10px;
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.3));
}

.version-badge { 
  font-size: 12px; 
  background: linear-gradient(135deg, var(--accent-yellow), var(--accent-red));
  color: #111; 
  padding: 4px 10px; 
  border-radius: 12px; 
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(255, 213, 77, 0.4);
}

.footer-desc { 
  font-size: 14px; 
  color: var(--text-secondary); 
  margin: 0 0 16px 0; 
  line-height: 1.6; 
}

.footer-stats {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 8px;
  transition: all 0.3s ease;
}

body:not(.low-performance) .stat-item:hover {
  background: rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.stat-icon {
  font-size: 18px;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.footer-links { 
  display: flex; 
  flex-direction: column;
  gap: 10px; 
}

.footer-link { 
  color: var(--text-secondary); 
  text-decoration: none; 
  font-size: 14px; 
  padding: 6px 0; 
  border-left: 3px solid transparent;
  padding-left: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-link .link-icon {
  font-size: 16px;
  transition: transform 0.3s ease;
}

.footer-link:hover { 
  color: var(--accent-cyan);
  border-left-color: var(--accent-cyan);
  padding-left: 16px;
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

body:not(.low-performance) .footer-link:hover .link-icon {
  transform: scale(1.2) rotate(5deg);
}

.footer-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-features li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-meta { 
  font-size: 13px; 
  color: var(--text-muted); 
  margin: 4px 0; 
}

.footer-meta strong { 
  color: var(--accent-cyan);
  font-weight: 700;
}

.footer-creators {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 8px 0;
}

.footer-creators strong {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 8px;
  text-decoration: none;
  font-size: 18px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ✨ Floating animation for social icons */
body:not(.low-performance) .social-link {
  animation: float 3s ease-in-out infinite;
}

body:not(.low-performance) .social-link:nth-child(1) { animation-delay: 0s; }
body:not(.low-performance) .social-link:nth-child(2) { animation-delay: 0.2s; }
body:not(.low-performance) .social-link:nth-child(3) { animation-delay: 0.4s; }
body:not(.low-performance) .social-link:nth-child(4) { animation-delay: 0.6s; }

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-4px); }
}

body:not(.low-performance) .social-link:hover {
  background: rgba(0, 212, 255, 0.2);
  transform: translateY(-6px) scale(1.15) rotate(5deg);
  box-shadow: 0 6px 16px rgba(0, 212, 255, 0.5), 
              0 0 20px rgba(0, 240, 255, 0.3);
  animation: none; /* Stop floating on hover */
}

.footer-bottom { 
  text-align: center; 
  padding: 24px 0; 
  border-top: 2px solid var(--border-secondary);
  background: rgba(0, 0, 0, 0.2);
}

.footer-bottom-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.copyright {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  font-weight: 500;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

.footer-tech {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
  opacity: 0.7;
}

/* Responsive Footer */
@media (max-width: 968px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  
  .footer-brand {
    grid-column: span 2;
  }
  
  .footer-stats {
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .footer-brand {
    grid-column: span 1;
  }
  
  .footer-container {
    padding: 32px 16px 0;
  }
  
  .footer-stats {
    justify-content: center;
  }
  
  .footer-social {
    justify-content: center;
  }
}

/* Low Performance Footer Optimizations */
.low-performance .app-footer::before {
  display: none;
}

.low-performance .stat-item:hover,
.low-performance .social-link:hover,
.low-performance .footer-link:hover .link-icon {
  transform: none;
}

.low-performance .footer-link:hover {
  padding-left: 12px;
}

/* 🎨 HIGH PERFORMANCE - Animated Gradient Section Title */
body:not(.low-performance) .section-title { 
  margin: 10px 0 14px; 
  font-size: 22px; 
  background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent-orange) 50%, var(--accent-red) 100%);
  background-size: 200% 200%;
  animation: gradientFlow 5s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: "Arial Black", Gadget, sans-serif;
  font-weight: 900;
  filter: drop-shadow(0 0 16px rgba(251, 191, 36, 0.6)) drop-shadow(0 0 32px rgba(249, 115, 22, 0.4));
  position: relative;
  padding-bottom: 16px;
}

/* ✨ Gradient divider below section titles */
body:not(.low-performance) .section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, 
    var(--accent-cyan) 0%, 
    var(--accent-purple) 33%, 
    var(--accent-pink) 66%, 
    transparent 100%);
  border-radius: 2px;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.5; transform: scaleX(1); }
  50% { opacity: 1; transform: scaleX(1.05); }
}

/* ⚡ LOW PERFORMANCE - Simple Section Title */
.low-performance .section-title {
  margin: 4px 0 8px;
  font-size: 18px;
  color: var(--accent-yellow);
  font-family: "Arial Black", Gadget, sans-serif;
  filter: none;
}

/* 🎨 HIGH PERFORMANCE - Glassmorphism Cards with 3D Hover */
body:not(.low-performance) .card { 
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  position: relative;
  z-index: 2;
  border: 2px solid var(--glass-border);
  border-radius: 20px; 
  padding: 24px; 
  margin: 16px auto; 
  width: min(100%, 1000px); 
  text-align: left;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(0, 240, 255, 0.05), transparent);
  transform: rotate(45deg);
  animation: cardShimmer 6s infinite;
}

@keyframes cardShimmer {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

body:not(.low-performance) .card:hover {
  transform: translateY(-8px) scale(1.02) rotateX(3deg);
  box-shadow: var(--shadow-xl), var(--glow-rainbow);
  border-color: var(--accent-cyan);
  border-width: 3px;
}

/* 🌟 Sparkle effect on hover */
body:not(.low-performance) .card:hover::after {
  content: '✨';
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 20px;
  animation: sparkle 1s ease-in-out infinite;
  pointer-events: none;
}

@keyframes sparkle {
  0%, 100% { 
    opacity: 0;
    transform: scale(0.5) rotate(0deg);
  }
  50% { 
    opacity: 1;
    transform: scale(1) rotate(180deg);
  }
}

/* ⚡ LOW PERFORMANCE - Simple Flat Cards */
.low-performance .card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  padding: 12px;
  margin: 10px auto;
  width: min(100%, 1000px);
  text-align: left;
  box-shadow: none;
  backdrop-filter: none;
  position: relative;
  z-index: 2;
}

.low-performance .card::before {
  display: none;
}

/* 🎨 HIGH PERFORMANCE - Enhanced Tool Cards */
body:not(.low-performance) .tool-card { 
  background: var(--glass-bg) !important;
  backdrop-filter: var(--blur-md) !important;
  -webkit-backdrop-filter: var(--blur-md) !important;
  border: 2px solid var(--glass-border) !important;
  border-radius: 20px !important;
  box-shadow: var(--shadow-lg) !important;
  position: relative !important;
  overflow: hidden !important;
}

body:not(.low-performance) .tool-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(168, 85, 247, 0.05), transparent);
  transform: rotate(45deg);
  animation: cardShimmer 6s infinite;
}

body:not(.low-performance) .tool-card:hover { 
  transform: translateY(-6px) scale(1.01) !important;
  box-shadow: var(--shadow-xl), var(--glow-rainbow) !important;
  border-color: var(--accent-purple) !important;
}

/* ⚡ LOW PERFORMANCE - Simple Tool Cards */
.low-performance .tool-card {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-card) !important;
  border-radius: 12px !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
}

.low-performance .tool-card::before {
  display: none;
}
.form-section { position: relative; z-index: 2; }
.form-section label { display: inline-block; min-width: 180px; margin: 4px 0; }
.form-section input, .form-section select, .form-section button { margin: 4px 0; position: relative; z-index: 2; }
.form-section button { margin-right: 6px; }

/* Quick links collapsible */
details > summary.section-title { cursor: pointer; list-style: none; }
details > summary.section-title::-webkit-details-marker { display: none; }
.ql-body { padding-top: 6px; }

/* Skip link for accessibility */
.skip-link { position: absolute; left: -999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.skip-link:focus { left: 12px; top: 12px; width: auto; height: auto; padding: 6px 10px; background: #000; color: #fff; border-radius: 6px; z-index: 1001; }

/* Compact copy actions grid */
.copy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 8px 12px; align-items: center; }
.copy-grid label { margin: 0; }
.copy-grid br { display: none; }
.copy-grid .copDb { width: 100%; }

/* Tighten table spacing */
.table2 td, .table2 th { padding: 4px 6px; }

/* Visible focus for keyboard users */
:where(button, input, select, a):focus-visible {
  outline: 2px solid var(--accent-yellow);
  outline-offset: 2px;
}

/* Reduce shadows for performance */
.style1, .style3, .copDb { box-shadow: none !important; }

/* Improve contrast of dark-red on black */
.darkbar { background: #7a0404; color: #fff; }

/* Lightweight buttons used for copy actions */
/* Lightweight site nav shared by pages */
.site-nav { position: sticky; top: 0; z-index: 1000; background: var(--bg-secondary); border-bottom: 1px solid var(--border-primary); padding: 6px 10px; display: flex; gap: 10px; }
.site-nav .nav-link { color: var(--text-secondary); text-decoration: none; font-size: 14px; padding: 4px 8px; border-radius: 6px; }
.site-nav button.nav-link { cursor: pointer; font-family: inherit; }
.site-nav .nav-link[aria-current="page"], .site-nav .nav-link:hover { color: var(--text-primary); background: var(--nav-hover); }

/* 🎨 HIGH PERFORMANCE - Interactive Buttons with Ripple Effect */
body:not(.low-performance) .btn-surface,
body:not(.low-performance) .style3,
body:not(.low-performance) .style4,
body:not(.low-performance) .copDb {
  color: var(--text-primary);
  background: var(--glass-bg);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 2px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .btn-surface::after,
body:not(.low-performance) .style3::after,
body:not(.low-performance) .style4::after,
body:not(.low-performance) .copDb::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

body:not(.low-performance) .btn-surface:active::after,
body:not(.low-performance) .style3:active::after,
body:not(.low-performance) .style4:active::after,
body:not(.low-performance) .copDb:active::after {
  width: 300px;
  height: 300px;
}

body:not(.low-performance) .btn-surface:hover,
body:not(.low-performance) .style3:hover,
body:not(.low-performance) .style4:hover,
body:not(.low-performance) .copDb:hover { 
  background: var(--nav-hover);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan), 
              inset 0 2px 8px rgba(0, 240, 255, 0.3),
              0 8px 24px rgba(0, 240, 255, 0.4);
  transform: translateY(-4px) scale(1.06);
}

body:not(.low-performance) .btn-surface:active,
body:not(.low-performance) .style3:active,
body:not(.low-performance) .style4:active,
body:not(.low-performance) .copDb:active { 
  transform: translateY(1px) scale(0.97);
  box-shadow: inset 0 4px 12px rgba(0, 212, 255, 0.5),
              0 2px 8px rgba(0, 212, 255, 0.3);
}

/* ⚡ LOW PERFORMANCE - Simple Buttons */
.low-performance .btn-surface,
.low-performance .style3,
.low-performance .style4,
.low-performance .copDb {
  color: var(--text-secondary);
  background: var(--nav-bg);
  border: 1px solid var(--border-secondary);
  backdrop-filter: none;
}

.low-performance .btn-surface::after,
.low-performance .style3::after,
.low-performance .style4::after,
.low-performance .copDb::after {
  display: none;
}

.low-performance .btn-surface:hover,
.low-performance .style3:hover,
.low-performance .style4:hover,
.low-performance .copDb:hover {
  background: var(--nav-hover);
  color: var(--text-primary);
}

/* 🎨 HIGH PERFORMANCE - Enhanced Copy Button */
body:not(.low-performance) .copDb {
  display: inline-block;
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  border-radius: 14px;
}

body:not(.low-performance) .copDb { 
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.12), rgba(168, 85, 247, 0.12));
  color: var(--text-primary);
  border: 2px solid var(--accent-cyan);
}

body:not(.low-performance) .copDb.active { 
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.25), rgba(168, 85, 247, 0.25));
  color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
  animation: successPulse 0.6s ease;
}

@keyframes successPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

body:not(.low-performance) .copDb:hover {
  box-shadow: var(--glow-cyan);
}

/* ⚡ LOW PERFORMANCE - Simple Copy Button */
.low-performance .copDb {
  display: inline-block;
  padding: 10px 16px;
  font-size: 16px;
  cursor: pointer;
  text-align: center;
  border-radius: 10px;
}

.low-performance .copDb {
  background: var(--nav-bg);
  color: var(--text-secondary);
}

.low-performance .copDb.active {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* 🎨 HIGH PERFORMANCE - Enhanced Low Banner */
body:not(.low-performance) .low-banner { 
  position: sticky; 
  top: 0; 
  z-index: 1001; 
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  color: var(--text-secondary); 
  border-bottom: 2px solid var(--glass-border);
  padding: 10px 14px; 
  font-size: 13px;
  box-shadow: var(--shadow-md);
}

/* ⚡ LOW PERFORMANCE - Simple Banner */
.low-performance .low-banner {
  position: sticky;
  top: 0;
  z-index: 1001;
  background: var(--nav-bg);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-secondary);
  padding: 6px 10px;
  font-size: 13px;
  backdrop-filter: none;
}

/* Compact header button overrides */
.header-bar .style1 {
  margin: 0;
  width: auto;
  font-size: 16px;
  font-weight: 800;
  padding: 8px 12px;
  border-left-width: 2px;
  border-right-width: 2px;
  display: inline-block;
}

/* Header bar styling (was .head inline) */
.head {
  background: #7a0404;
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  font-family: Suiss, GE_SS_Two, Roboto, Arial, sans-serif;
}

/* Small paragraph alignment previously in .pp */
.pp {
  text-align: right;
  font-size: 13px;
  font-family: Gill Sans, Gill Sans MT, Calibri, Trebuchet MS, sans-serif;
}

/* 🎨 HIGH PERFORMANCE - Ultra 3D "Start Day!" Button */
body:not(.low-performance) .style1 {
  border-radius: 20px;
  width: 250px;
  text-align: center;
  font-family: "Arial Black", Gadget, sans-serif;
  font-size: 26px;
  font-weight: 900;
  border: 0;
  margin: 30px auto;
  padding: 18px 28px;
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.15), rgba(168, 85, 247, 0.15), rgba(236, 72, 153, 0.15));
  border: 3px solid var(--accent-yellow);
  display: block;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(251, 191, 36, 0.4);
  position: relative;
  overflow: hidden;
}

body:not(.low-performance) .style1::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: rotate(45deg);
  animation: buttonShine 3s infinite;
}

@keyframes buttonShine {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

body:not(.low-performance) .style1:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: var(--glow-rainbow);
  transform: translateY(-6px) scale(1.05) rotateX(5deg);
  animation: buttonPulse 1s infinite;
}

@keyframes buttonPulse {
  0%, 100% { box-shadow: var(--glow-cyan); }
  50% { box-shadow: var(--glow-purple); }
}

body:not(.low-performance) .style1:active {
  transform: translateY(-2px) scale(1.02);
}

/* ⚡ LOW PERFORMANCE - Simple Primary Button */
.low-performance .style1 {
  border-radius: 15px;
  width: 250px;
  text-align: center;
  font-family: "Arial Black", Gadget, sans-serif;
  font-size: 24px;
  font-weight: 900;
  border: 0;
  margin: 30px auto;
  padding: 15px 20px;
  background-color: transparent;
  border-left: 3px solid var(--accent-yellow);
  border-right: 3px solid var(--accent-yellow);
  display: block;
  color: inherit;
}

.low-performance .style1::before {
  display: none;
}

.low-performance .style1:hover {
  border-left-color: var(--text-primary);
  border-right-color: var(--text-primary);
  color: var(--accent-yellow);
}

/* 🎨 HIGH PERFORMANCE - Enhanced Utility Buttons */
body:not(.low-performance) .style3,
body:not(.low-performance) .style4 {
  font-size: 18px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  border: 2px solid var(--accent-yellow);
  padding: 10px 14px;
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.1), rgba(168, 85, 247, 0.1));
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  width: 160px;
  border-radius: 12px;
  color: var(--text-primary);
  box-shadow: 0 6px 16px rgba(251, 191, 36, 0.3);
}

body:not(.low-performance) .style3:hover,
body:not(.low-performance) .style4:hover { 
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
  transform: translateY(-3px) scale(1.05);
}

body:not(.low-performance) .style4:hover { 
  width: 200px;
}

/* ⚡ LOW PERFORMANCE - Simple Utility Buttons */
.low-performance .style3,
.low-performance .style4 {
  font-size: 18px;
  border: none;
  cursor: pointer;
  border-left: 2px solid var(--accent-yellow);
  border-right: 2px solid var(--accent-yellow);
  padding: 5px 8px;
  background-color: transparent;
  width: 160px;
  border-radius: 5px;
  color: inherit;
  backdrop-filter: none;
}

.low-performance .style3:hover,
.low-performance .style4:hover {
  color: var(--accent-yellow);
  border-left-color: var(--text-primary);
  border-right-color: var(--text-primary);
}

.low-performance .style4:hover {
  width: 160px;
}

/* Tables */
.table {
  width: 800px;
  font-size: 14px;
  margin: 0 auto;
  padding: 10px;
  border-radius: 5px;
}
.table th h1 { font-weight: bold; font-size: 16px; text-align: center; }
.table th { font-family: "Arial Black", Gadget, sans-serif; font-size: 18px; border-radius: 10px; }
.table td { font-family: Arial, Helvetica, sans-serif; font-size: 18px; padding: 5px 0; }

.table2 {
  width: 100%;
  font-size: 14px;
  margin: 0 auto;
  padding: 10px;
}
.table2 th h1 { font-weight: bold; font-size: 16px; text-align: center; }
.table2 th { font-family: "Arial Black", Gadget, sans-serif; font-size: 14px; padding: 5px; }
.table2 td { font-family: Arial, Helvetica, sans-serif; font-size: 14px; padding: 5px 0; }

/* Captions and clock */
.cap { color: #FC3; font-family: "Arial Black", Gadget, sans-serif; font-size: 22px; }
/* Keep header clock compact */
#clock { font-family: "Arial Black", Gadget, sans-serif; font-size: 22px; color: #F53; margin-bottom: 0; }

/* visibility helper */
.hidden { display: none !important; }
/* Toast notification styling */
#toast {
  position: fixed;
  z-index: 1000;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  opacity: 0;
  transition: opacity .15s ease;
}
#toast.active { opacity: 1; }

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* 📱 MOBILE & TABLET RESPONSIVE STYLES */
@media (max-width: 1024px) {
  .site-header-inner {
    flex-direction: column;
    gap: 12px;
    padding: 12px 16px;
  }
  
  .brand-row {
    width: 100%;
    justify-content: center;
  }
  
  .site-nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
  }
  
  .site-nav .nav-link {
    font-size: 13px;
    padding: 8px 12px;
    white-space: nowrap;
  }
  
  .title-gradient {
    font-size: 20px !important;
  }
  
  .brand-badge {
    font-size: 12px !important;
    padding: 4px 10px !important;
  }
}

@media (max-width: 768px) {
  .site-header-inner {
    padding: 10px 12px;
    gap: 10px;
  }
  
  .brand-row {
    gap: 8px;
  }
  
  .title-gradient {
    font-size: 18px !important;
  }
  
  .brand-badge {
    font-size: 11px !important;
    padding: 3px 8px !important;
  }
  
  .site-nav {
    gap: 6px;
    max-width: 100%;
  }
  
  .site-nav .nav-link {
    font-size: 12px;
    padding: 6px 10px;
    flex: 1 1 auto;
    min-width: fit-content;
    text-align: center;
  }
  
  /* Hide RAM monitor on smaller screens */
  .ram-monitor {
    display: none;
  }
  
  /* Compact theme toggle */
  .theme-toggle {
    min-width: auto;
  }
  
  .theme-text {
    display: none;
  }
  
  .theme-icon {
    font-size: 18px;
  }
}

@media (max-width: 640px) {
  .site-header-inner {
    padding: 8px 10px;
  }
  
  .title-gradient {
    font-size: 16px !important;
  }
  
  .brand-badge {
    font-size: 10px !important;
    padding: 2px 6px !important;
  }
  
  .site-nav {
    gap: 4px;
  }
  
  .site-nav .nav-link {
    font-size: 11px;
    padding: 5px 8px;
  }
  
  /* Make nav items stack on very small screens if needed */
  .site-nav {
    max-height: none;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  
  /* Make performance toggle compact on mobile */
  #perfToggle {
    font-size: 11px;
    padding: 5px 8px;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .site-header-inner {
    padding: 8px;
  }
  
  .brand-row {
    gap: 6px;
  }
  
  .title-gradient {
    font-size: 14px !important;
  }
  
  .brand-badge {
    font-size: 9px !important;
    padding: 2px 5px !important;
  }
  
  .site-nav {
    gap: 3px;
  }
  
  .site-nav .nav-link {
    font-size: 10px;
    padding: 4px 6px;
    border-radius: 6px;
  }
  
  /* Even more compact on tiny screens */
  .theme-toggle {
    padding: 4px 8px;
  }
  
  .theme-icon {
    font-size: 16px;
  }
}

/* Fix animated background on mobile */
@media (max-width: 768px) {
  .animated-bg {
    position: fixed;
    opacity: 0.3;
  }
  
  .floating-shapes .shape {
    width: 200px;
    height: 200px;
  }
  
  /* Prevent black screen issues */
  body {
    min-height: 100vh;
    background: var(--bg-primary);
  }
  
  .container {
    position: relative;
    z-index: 1;
  }
}

/* Mail preview area */
.mail-preview {
  max-width: 900px;
  margin: 24px auto;
  text-align: left;
}
.mail { border-collapse: collapse; width: 100%; }
.mail caption { text-align: left; }
.mail .cap1 { margin-bottom: 30px; }
.mail .cap2 { margin-bottom: 20px; }
.mail td { border: 0; padding: 6px 8px; }
.mail .cell { border: 1px solid #000; }
.mail .bar { background: darkred; color: #fff; font-weight: bold; }
.mail .bar-edge { background: darkred; color: #fff; font-weight: bold; border-width: 1px; border-style: solid; border-color: #000 #000 #fff #fff; }
.mail .regards { margin-top: 30px; text-align: left; border: 0 !important; }

/* ====================================
   🎓 INTERACTIVE TUTORIAL SYSTEM
   ==================================== */

/* Tutorial Overlay */
.tutorial-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 99998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tutorial-overlay.active {
  opacity: 1;
}

/* Tutorial Tooltip */
.tutorial-tooltip {
  position: fixed;
  max-width: 420px;
  width: 90%;
  background: linear-gradient(145deg, rgba(21, 24, 38, 0.98) 0%, rgba(27, 32, 49, 0.98) 100%);
  border: 2px solid;
  border-image: linear-gradient(145deg, var(--accent-cyan), var(--accent-purple)) 1;
  border-radius: 16px;
  padding: 0;
  z-index: 99999;
  box-shadow: var(--shadow-xl), var(--glow-cyan);
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.3s ease, transform 0.3s ease;
  overflow: hidden;
}

.tutorial-tooltip.active {
  opacity: 1;
  transform: scale(1);
}

/* Tutorial Header */
.tutorial-header {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(157, 78, 221, 0.15) 100%);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(0, 212, 255, 0.3);
}

.tutorial-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-cyan);
  margin: 0;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
}

.tutorial-close {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.tutorial-close:hover {
  background: rgba(244, 63, 94, 0.3);
  border-color: var(--accent-red);
  transform: rotate(90deg);
}

/* Tutorial Content */
.tutorial-content {
  padding: 20px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.tutorial-content strong {
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Tutorial Progress */
.tutorial-progress {
  padding: 0 20px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.tutorial-progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.tutorial-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 3px;
  transition: width 0.3s ease;
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.6);
}

.tutorial-progress-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 45px;
  text-align: right;
}

/* Tutorial Controls */
.tutorial-controls {
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.tutorial-btn {
  flex: 1;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tutorial-btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: #111;
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.4);
}

.tutorial-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.6);
}

.tutorial-btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.tutorial-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-cyan);
}

/* Element Highlighting */
.tutorial-highlight {
  position: relative;
  z-index: 99997 !important;
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.6), 
              0 0 0 8px rgba(0, 212, 255, 0.3),
              0 0 40px rgba(0, 212, 255, 0.8) !important;
  animation: tutorial-highlight-pulse 2s ease-in-out infinite;
}

@keyframes tutorial-highlight-pulse {
  0%, 100% {
    box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.6), 
                0 0 0 8px rgba(0, 212, 255, 0.3),
                0 0 40px rgba(0, 212, 255, 0.8);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(157, 78, 221, 0.6), 
                0 0 0 8px rgba(157, 78, 221, 0.3),
                0 0 40px rgba(157, 78, 221, 0.8);
  }
}

/* Pulse Animation for Interactive Elements */
.tutorial-pulse {
  animation: tutorial-pulse 1.5s ease-in-out infinite;
}

@keyframes tutorial-pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Tutorial Completion Screen */
.tutorial-completion {
  padding: 40px 20px;
  text-align: center;
}

.completion-icon {
  font-size: 80px;
  margin-bottom: 20px;
  animation: completion-bounce 0.6s ease-in-out;
}

@keyframes completion-bounce {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.3);
  }
}

.completion-title {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.completion-message {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}

/* Tutorial Help Button (Floating) */
.tutorial-help-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 24px;
  color: #111;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.6);
  z-index: 9999;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.tutorial-help-btn:hover {
  transform: scale(1.1) rotate(15deg);
  box-shadow: 0 6px 30px rgba(0, 212, 255, 0.8);
}

.tutorial-help-btn:active {
  transform: scale(0.95);
}

/* Tutorial Menu (When help button clicked) */
.tutorial-menu {
  position: fixed;
  bottom: 90px;
  right: 24px;
  background: linear-gradient(145deg, rgba(21, 24, 38, 0.98) 0%, rgba(27, 32, 49, 0.98) 100%);
  border: 2px solid;
  border-image: linear-gradient(145deg, var(--accent-cyan), var(--accent-purple)) 1;
  border-radius: 16px;
  padding: 16px;
  min-width: 280px;
  box-shadow: var(--shadow-xl);
  z-index: 9998;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s ease;
}

.tutorial-menu.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.tutorial-menu-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--accent-cyan);
  margin: 0 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.3);
}

.tutorial-menu-item {
  padding: 10px 12px;
  margin: 6px 0;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.tutorial-menu-item:hover {
  background: rgba(0, 212, 255, 0.15);
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}

.tutorial-menu-item .icon {
  font-size: 18px;
}

.tutorial-menu-item.completed::after {
  content: '✓';
  margin-left: auto;
  color: var(--accent-green);
  font-weight: 900;
}

/* Mobile Responsive Tutorial */
@media (max-width: 768px) {
  .tutorial-tooltip {
    max-width: calc(100% - 32px);
    left: 16px !important;
    right: 16px !important;
    transform: translateX(0) !important;
  }
  
  .tutorial-tooltip.active {
    transform: translateX(0) scale(1) !important;
  }
  
  .tutorial-title {
    font-size: 16px;
  }
  
  .tutorial-content {
    font-size: 14px;
    padding: 16px;
  }
  
  .tutorial-controls {
    flex-direction: column;
  }
  
  .tutorial-btn {
    width: 100%;
  }
  
  .tutorial-help-btn {
    width: 48px;
    height: 48px;
    font-size: 20px;
    bottom: 16px;
    right: 16px;
  }
  
  .tutorial-menu {
    right: 16px;
    bottom: 74px;
    min-width: 240px;
  }
  
  .completion-icon {
    font-size: 60px;
  }
  
  .completion-title {
    font-size: 22px;
  }
}

/* Low Performance Mode - Disable Tutorial Animations */
.low-performance .tutorial-highlight {
  animation: none;
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.8) !important;
}

.low-performance .tutorial-pulse {
  animation: none;
}

.low-performance .tutorial-tooltip,
.low-performance .tutorial-overlay {
  transition: none;
}

/* Light Theme Tutorial Adjustments */
[data-theme="light"] .tutorial-overlay {
  background: rgba(255, 255, 255, 0.85);
}

[data-theme="light"] .tutorial-tooltip {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 250, 252, 0.98) 100%);
  border-color: var(--accent-cyan);
  color: #1a1a2e;
}

[data-theme="light"] .tutorial-header {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(157, 78, 221, 0.1) 100%);
}

[data-theme="light"] .tutorial-title {
  color: #0891b2;
}

[data-theme="light"] .tutorial-content {
  color: #475569;
}

[data-theme="light"] .tutorial-content strong {
  color: #0891b2;
}

[data-theme="light"] .tutorial-close {
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.1);
  color: #1a1a2e;
}

[data-theme="light"] .tutorial-close:hover {
  background: rgba(244, 63, 94, 0.2);
}