/* ========== CSS Variables & Theme System ========== */
:root {
  /* Color Palette - Light Mode (Default) */
  --primary-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
  --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%);
  --hero-gradient: linear-gradient(135deg, #f1f5f9 0%, #e0f2fe 50%, #dbeafe 100%);
  --accent-color: #0891b2;
  --accent-hover: #06b6d4;
  --accent-glow: rgba(6, 182, 212, 0.25);
  --accent-gradient: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
  
  /* Glass Effects - Light Mode */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(148, 163, 184, 0.3);
  --glass-border-hover: rgba(148, 163, 184, 0.5);
  --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.1);
  --glass-blur: blur(20px);
  --glass-inner-glow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  
  /* Text Colors - Light Mode */
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-gradient: linear-gradient(135deg, #0f172a 0%, var(--accent-color) 100%);
  
  /* Backgrounds - Light Mode */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-input: rgba(241, 245, 249, 0.8);
  --bg-input-focus: #ffffff;
  
  /* Semantic Colors - Enhanced with glow */
  --success: #059669;
  --success-light: #10b981;
  --success-glow: rgba(16, 185, 129, 0.25);
  --warning: #d97706;
  --warning-light: #f59e0b;
  --warning-glow: rgba(245, 158, 11, 0.25);
  --danger: #dc2626;
  --danger-light: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.25);
  --info: #2563eb;
  --info-light: #3b82f6;
  --info-glow: rgba(59, 130, 246, 0.25);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Shadows - Light Mode */
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 16px 48px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 40px var(--accent-glow);
}

/* ========== Dark Mode Variables ========== */
body.dark-mode {
  --primary-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  --hero-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
  --accent-color: #06b6d4;
  --accent-hover: #22d3ee;
  --accent-glow: rgba(6, 182, 212, 0.4);
  --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%);
  
  /* Glass Effects - Dark Mode */
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-bg-hover: rgba(15, 23, 42, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-hover: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glass-inner-glow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  
  /* Text Colors - Dark Mode */
  --text-primary: #f1f5f9;
  --text-secondary: rgba(241, 245, 249, 0.8);
  --text-muted: rgba(241, 245, 249, 0.5);
  --text-gradient: linear-gradient(135deg, #f1f5f9 0%, var(--accent-color) 100%);
  
  /* Backgrounds - Dark Mode */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.8);
  --bg-input: rgba(255, 255, 255, 0.08);
  --bg-input-focus: rgba(255, 255, 255, 0.12);
  
  /* Semantic Colors - Dark Mode with glow */
  --success: #10b981;
  --success-light: #34d399;
  --success-glow: rgba(16, 185, 129, 0.35);
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --warning-glow: rgba(245, 158, 11, 0.35);
  --danger: #ef4444;
  --danger-light: #f87171;
  --danger-glow: rgba(239, 68, 68, 0.35);
  --info: #3b82f6;
  --info-light: #60a5fa;
  --info-glow: rgba(59, 130, 246, 0.35);
  
  /* Shadows - Dark Mode */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.35);
}

/* ========== Base Reset & Typography ========== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--primary-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.landing {
  display: flex;
  flex-direction: column;
}

/* Animated Background Orbs */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  z-index: -1;
  animation: float 20s ease-in-out infinite;
  transition: var(--transition-slow);
}

body::before {
  width: 500px;
  height: 500px;
  background: rgba(6, 182, 212, 0.2);
  top: -100px;
  right: -100px;
}

body::after {
  width: 400px;
  height: 400px;
  background: rgba(59, 130, 246, 0.15);
  bottom: -100px;
  left: -100px;
  animation-delay: -10s;
}

/* Dark mode orbs - more vibrant */
body.dark-mode::before {
  background: rgba(6, 182, 212, 0.15);
  opacity: 0.5;
}

body.dark-mode::after {
  background: rgba(99, 102, 241, 0.12);
  opacity: 0.5;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  25% { transform: translate(30px, -30px) rotate(5deg) scale(1.05); }
  50% { transform: translate(-20px, 20px) rotate(-5deg) scale(0.95); }
  75% { transform: translate(-30px, -20px) rotate(3deg) scale(1.02); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 40px var(--accent-glow), 0 0 60px var(--accent-glow); }
}

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes ripple {
  0% { transform: scale(0); opacity: 0.5; }
  100% { transform: scale(4); opacity: 0; }
}

/* ========== Navbar ========== */
.navbar {
  width: 100%;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-inner-glow), 0 4px 30px rgba(0, 0, 0, 0.1);
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  transition: var(--transition-base);
}

.navbar.scrolled {
  padding: 0.75rem 2rem;
  background: rgba(0, 0, 0, 0.3);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo img {
  width: 2.5rem;
  height: 2.5rem;
  filter: brightness(0) invert(1) drop-shadow(0 0 8px rgba(6, 182, 212, 0.3));
  transition: var(--transition-bounce);
}

.logo:hover img {
  transform: rotate(-10deg) scale(1.15);
  filter: brightness(0) invert(1) drop-shadow(0 0 12px rgba(6, 182, 212, 0.5));
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(6, 182, 212, 0.2);
}

.navbar nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: var(--transition-base);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::before {
  width: 80%;
}

.nav-link.signup {
  background: var(--accent-gradient);
  color: #0f172a;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.nav-link.signup::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.5s ease;
}

.nav-link.signup:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.nav-link.signup:active::before {
  animation: ripple 0.6s ease-out;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ========== Theme Toggle Button ========== */
.theme-btn {
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  color: var(--accent-color);
  border-radius: var(--radius-full);
  font-size: 1.25rem;
  width: 2.75rem;
  height: 2.75rem;
  cursor: pointer;
  transition: var(--transition-bounce);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.theme-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition-base);
}

.theme-btn:hover {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #0f172a;
  transform: rotate(360deg) scale(1.15);
  box-shadow: 0 0 25px var(--accent-glow);
}

.theme-btn:hover::after {
  opacity: 1;
}

.theme-icon {
  z-index: 1;
  transition: transform 0.3s ease;
}

.theme-btn:hover .theme-icon {
  transform: scale(1.2);
}

/* ========== Hero Section ========== */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  min-height: 100vh;
}

.hero-content {
  max-width: 650px;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  padding: 3rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  text-align: center;
  animation: slideUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.hero-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), #f093fb, var(--accent-color));
  background-size: 200% 100%;
  animation: shimmer 3s ease infinite;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content h2 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-content .subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* ========== Feature Highlights ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-item {
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-6px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.feature-item:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
  transition: transform 0.3s ease;
}

.feature-item:hover .feature-icon {
  transform: scale(1.15) rotate(-5deg);
}

.feature-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.feature-item p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
}

/* ========== Buttons ========== */
.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transition: width 0.6s, height 0.6s, top 0.6s, left 0.6s;
  transform: translate(-50%, -50%);
}

.btn:active::after {
  width: 300px;
  height: 300px;
}

.btn.primary {
  background: var(--accent-gradient);
  color: #0f172a;
  box-shadow: 0 4px 20px var(--accent-glow);
  position: relative;
  z-index: 1;
}

.btn.primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-color) 100%);
  border-radius: inherit;
  opacity: 0;
  transition: var(--transition-base);
  z-index: -1;
}

.btn.primary:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 35px var(--accent-glow);
}

.btn.primary:hover::before {
  opacity: 1;
}

.btn.secondary {
  background: rgba(6, 182, 212, 0.1);
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
  backdrop-filter: blur(8px);
}

.btn.secondary:hover {
  background: var(--accent-color);
  color: #0f172a;
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn.danger {
  background: linear-gradient(135deg, var(--danger) 0%, var(--danger-light) 50%, var(--danger) 100%);
  background-size: 200% 100%;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn.danger:hover {
  box-shadow: 0 10px 30px var(--danger-glow);
  transform: translateY(-4px) scale(1.02);
  background-position: 100% 0;
}

.btn.success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: #fff;
}

.btn.success:hover {
  box-shadow: 0 8px 25px var(--success-glow);
  transform: translateY(-3px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn .btn-icon {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.btn:hover .btn-icon {
  transform: scale(1.2) rotate(-5deg);
}

/* Glow Button Effect */
.btn.btn-glow {
  animation: glow 3s ease-in-out infinite;
}

/* Loading State */
.btn.loading {
  pointer-events: none;
  position: relative;
  color: transparent !important;
}

.btn.loading::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  border: 3px solid transparent;
  border-top-color: #1a1a2e;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========== Hero Badge ========== */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
  animation: slideUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-badge .badge-icon {
  animation: float 3s ease-in-out infinite;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-color) 0%, #6366f1 50%, var(--accent-color) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

/* Trust Badges */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: all 0.3s ease;
}

.trust-badge:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  transform: translateY(-2px);
}

/* ========== Form Styles ========== */
.input-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition-base);
  outline: none;
}

.input-group input::placeholder,
.input-group textarea::placeholder {
  color: var(--text-muted);
}

.input-group input:hover,
.input-group textarea:hover {
  background: rgba(255, 255, 255, 0.12);
}

.input-group input:focus,
.input-group textarea:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Floating Labels */
.input-group.floating {
  margin-bottom: 1.75rem;
}

.input-group.floating label {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
  pointer-events: none;
  transition: var(--transition-base);
  margin: 0;
}

.input-group.floating textarea ~ label {
  top: 1.25rem;
  transform: none;
}

.input-group.floating input:focus ~ label,
.input-group.floating input:not(:placeholder-shown) ~ label,
.input-group.floating textarea:focus ~ label,
.input-group.floating textarea:not(:placeholder-shown) ~ label {
  top: -0.5rem;
  left: 0.75rem;
  font-size: 0.8rem;
  color: var(--accent-color);
  background: linear-gradient(135deg, #667eea, #764ba2);
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* Password Toggle */
.password-wrapper {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0.25rem;
  transition: var(--transition-fast);
}

.password-toggle:hover {
  color: var(--accent-color);
}

/* Form Links */
.form-links {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.form-links a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-fast);
}

.form-links a:hover {
  text-decoration: underline;
}

/* ========== Footer ========== */
.footer {
  text-align: center;
  padding: 2rem;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--glass-border);
}

.github-section {
  margin-bottom: 1rem;
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--accent-color);
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.github-link:hover {
  background: var(--accent-color);
  color: #1a1a2e;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.github-link img {
  width: 1.25rem;
  filter: brightness(0) invert(1);
  transition: var(--transition-fast);
}

.github-link:hover img {
  filter: none;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========== Toast Notifications ========== */
.toast-container {
  position: fixed;
  top: 5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 10000;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 380px;
}

.toast.removing {
  animation: toastOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.success .toast-icon { color: var(--success); }

.toast.error { border-left: 4px solid var(--danger); }
.toast.error .toast-icon { color: var(--danger); }

.toast.warning { border-left: 4px solid var(--warning); }
.toast.warning .toast-icon { color: var(--warning); }

.toast.info { border-left: 4px solid var(--info); }
.toast.info .toast-icon { color: var(--info); }

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.toast-message {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0.25rem;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.toast-close:hover {
  color: var(--text-primary);
}

/* ========== Loading Overlay ========== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--glass-border);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* ========== Modal Styles ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  padding: 1rem;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 450px;
  width: 100%;
  transform: scale(0.9) translateY(20px);
  transition: var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-close:hover {
  color: var(--danger);
  transform: rotate(90deg);
}

.modal-body {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.modal-footer {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

/* ========== Skeleton Loading ========== */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 25%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.05) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ========== Accessibility ========== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* ========== Scroll Reveal Animation ========== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Ripple Effect ========== */
.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: rippleAnim 0.6s linear;
  pointer-events: none;
  width: 20px;
  height: 20px;
  margin-left: -10px;
  margin-top: -10px;
}

@keyframes rippleAnim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ========== Selection Color ========== */
::selection {
  background: var(--accent-color);
  color: #1a1a2e;
}

/* ========== Custom Scrollbar ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-color) 0%, #6366f1 100%);
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
  background-clip: padding-box;
}

/* ========== Input Autofill Styling ========== */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--text-primary);
  -webkit-box-shadow: 0 0 0px 1000px rgba(255, 255, 255, 0.1) inset;
  transition: background-color 5000s ease-in-out 0s;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .reveal-on-scroll {
    opacity: 1;
    transform: none;
  }
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .navbar {
    padding: 0.75rem 1rem;
  }
  
  .navbar nav {
    gap: 0.5rem;
  }
  
  .nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }
  
  .hero {
    padding: 6rem 1rem 2rem;
  }
  
  .hero-content {
    padding: 2rem 1.5rem;
  }
  
  .hero-content h2 {
    font-size: 2rem;
  }
  
  .hero-badge {
    font-size: 0.75rem;
    padding: 0.4rem 1rem;
  }
  
  .trust-badges {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .toast-container {
    left: 1rem;
    right: 1rem;
    top: 4.5rem;
  }
  
  .toast {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .logo h1 {
    font-size: 1.25rem;
  }
  
  .nav-link:not(.signup) {
    display: none;
  }
  
  .hero-content h2 {
    font-size: 1.75rem;
  }
}

/* ========== Light Mode Specific Styles ========== */
body:not(.dark-mode) .navbar {
  background: rgba(255, 255, 255, 0.85);
  border-bottom-color: var(--glass-border);
}

body:not(.dark-mode) .navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.1);
}

body:not(.dark-mode) .logo img {
  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.3));
}

body:not(.dark-mode) .logo:hover img {
  filter: drop-shadow(0 0 12px rgba(6, 182, 212, 0.5));
}

body:not(.dark-mode) .nav-link {
  color: var(--text-secondary);
}

body:not(.dark-mode) .nav-link:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

body:not(.dark-mode) .theme-toggle {
  background: var(--bg-secondary);
  border-color: var(--glass-border);
}

body:not(.dark-mode) .theme-toggle:hover {
  background: var(--bg-input-focus);
  border-color: var(--accent-color);
}

body:not(.dark-mode) .btn-primary {
  background: var(--accent-gradient);
  color: white;
}

body:not(.dark-mode) .btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--glass-border);
}

body:not(.dark-mode) .btn-secondary:hover {
  border-color: var(--accent-color);
  background: var(--bg-secondary);
}

body:not(.dark-mode) .glass-card,
body:not(.dark-mode) .auth-card {
  background: var(--bg-card);
  border-color: var(--glass-border);
  box-shadow: var(--shadow-lg);
}

body:not(.dark-mode) .form-group input {
  background: var(--bg-input);
  border-color: var(--glass-border);
  color: var(--text-primary);
}

body:not(.dark-mode) .form-group input:focus {
  background: var(--bg-input-focus);
  border-color: var(--accent-color);
}

body:not(.dark-mode) .form-group input::placeholder {
  color: var(--text-muted);
}

body:not(.dark-mode) .form-group label {
  color: var(--text-secondary);
}

body:not(.dark-mode) .feature-card {
  background: var(--bg-card);
  border-color: var(--glass-border);
}

body:not(.dark-mode) .feature-card:hover {
  border-color: var(--accent-color);
  box-shadow: var(--shadow-xl);
}

body:not(.dark-mode) .hero-content {
  background: var(--bg-card);
  border-color: var(--glass-border);
}

body:not(.dark-mode) .hero-badge {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

body:not(.dark-mode) .trust-badge {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

body:not(.dark-mode) footer {
  background: var(--bg-secondary);
  border-top-color: var(--glass-border);
}

body:not(.dark-mode) .toast {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--glass-border);
  box-shadow: var(--shadow-lg);
}

body:not(.dark-mode) .loading-overlay {
  background: rgba(248, 250, 252, 0.9);
}

body:not(.dark-mode) .spinner {
  border-color: var(--glass-border);
  border-top-color: var(--accent-color);
}