/* BinMaster Premium - Glassmorphism Design System */

/* Import Poppins Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* CSS Variables - Design Tokens */
:root {
  /* Primary Colors */
  --primary-50: #E5F2FF;
  --primary-100: #CCE5FF;
  --primary-500: #007AFF;
  --primary-600: #0051D5;
  --primary-900: #003D99;
  
  /* Neutral Colors */
  --neutral-50: #F8F9FA;
  --neutral-100: #F1F3F5;
  --neutral-200: #E9ECEF;
  --neutral-500: #86868B;
  --neutral-700: #495057;
  --neutral-900: #1D1D1F;
  
  /* Semantic Colors */
  --success-500: #10B981;
  --error-500: #EF4444;
  --warning-500: #F59E0B;
  --info-500: #3B82F6;
  
  /* Background */
  --bg-page: #FAFBFF;
  
  /* Glass Colors */
  --glass-white-40: rgba(255, 255, 255, 0.4);
  --glass-white-50: rgba(255, 255, 255, 0.5);
  --glass-white-35: rgba(255, 255, 255, 0.35);
  --glass-white-15: rgba(255, 255, 255, 0.15);
  
  /* Glass Borders */
  --glass-border-20: rgba(255, 255, 255, 0.2);
  --glass-border-30: rgba(255, 255, 255, 0.3);
  --glass-border-40: rgba(255, 255, 255, 0.4);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-glass-card: 0 8px 32px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.05);
  --shadow-glass-hover: 0 12px 40px rgba(0, 0, 0, 0.12), 0 6px 20px rgba(0, 0, 0, 0.08);
  --shadow-glass-modal: 0 20px 60px rgba(0, 0, 0, 0.15), 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-button: 0 4px 12px rgba(0, 122, 255, 0.3);
  
  /* Animation */
  --duration-fast: 200ms;
  --duration-normal: 300ms;
  --duration-smooth: 400ms;
  --easing: cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--neutral-700);
  background: linear-gradient(135deg, #E8EAF0 0%, #F4F5F9 50%, #FAFBFF 100%);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Glass Container Base */
.glass-card {
  background: var(--glass-white-40);
  backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid var(--glass-border-20);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-glass-card);
  transition: all var(--duration-normal) var(--easing);
}

/* Fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(20px)) {
  .glass-card {
    background: rgba(255, 255, 255, 0.85);
  }
}

.glass-card-hover:hover {
  transform: translateY(-8px);
  backdrop-filter: blur(25px) saturate(180%);
  border-color: var(--glass-border-35);
  box-shadow: var(--shadow-glass-hover);
}

.glass-card-strong {
  background: var(--glass-white-50);
  backdrop-filter: blur(40px) saturate(150%);
}

.glass-card-subtle {
  background: var(--glass-white-35);
  backdrop-filter: blur(15px) saturate(160%);
}

.glass-card-minimal {
  background: var(--glass-white-15);
  backdrop-filter: blur(10px) saturate(150%);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--neutral-900);
  line-height: 1.3;
}

h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 2.5rem;
  letter-spacing: 0;
}

h3 {
  font-size: 1.75rem;
  font-weight: 500;
}

.hero-title {
  font-size: 5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.text-body-large {
  font-size: 1.5rem;
  line-height: 1.6;
}

.text-small {
  font-size: 0.875rem;
}

.text-caption {
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.01em;
}

/* Text on glass - enhanced legibility */
.glass-card h1,
.glass-card h2,
.glass-card h3 {
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.glass-card p,
.glass-card li {
  font-weight: 400;
}

/* Layout & Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-article {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-tool {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation Bar - Sticky Glass */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--glass-white-15);
  backdrop-filter: blur(25px) saturate(180%);
  border-bottom: 1px solid var(--glass-border-20);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  transition: all var(--duration-fast) ease-out;
}

.navbar.scrolled {
  backdrop-filter: blur(30px) saturate(200%);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.navbar-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neutral-900);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.navbar-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--neutral-700);
  text-decoration: none;
  position: relative;
  transition: color var(--duration-fast) ease-out;
}

.navbar-link:hover {
  color: var(--primary-500);
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-500);
  transition: width var(--duration-normal) var(--easing);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  width: 100%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.25rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) ease-out;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-500);
  color: white;
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  background: var(--primary-600);
  transform: scale(1.02);
  box-shadow: 0 6px 16px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
  background: var(--glass-white-15);
  backdrop-filter: blur(10px);
  border: 1.5px solid var(--glass-border-30);
  color: var(--neutral-900);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: var(--glass-border-40);
}

.btn-large {
  height: 64px;
  padding: 0 2.5rem;
  font-size: 1.25rem;
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  background: var(--glass-white-15);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border-20);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Hero Section */
.hero {
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) var(--spacing-md);
  text-align: center;
}

.hero-glass {
  background: var(--glass-white-40);
  backdrop-filter: blur(25px) saturate(160%);
  border: 1px solid var(--glass-border-30);
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl) var(--spacing-2xl);
  box-shadow: var(--shadow-glass-modal);
  max-width: 800px;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Tool Cards */
.tool-card {
  background: var(--glass-white-40);
  backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid var(--glass-border-20);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-glass-card);
  transition: all var(--duration-normal) var(--easing);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.tool-card:hover {
  transform: translateY(-8px);
  backdrop-filter: blur(25px) saturate(180%);
  border-color: var(--glass-border-30);
  box-shadow: var(--shadow-glass-hover);
}

.tool-icon {
  width: 56px;
  height: 56px;
  color: var(--primary-500);
}

.tool-card-title {
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--neutral-900);
  margin: 0;
}

.tool-card-description {
  color: var(--neutral-700);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--neutral-700);
  margin-bottom: 12px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  height: 56px;
  padding: 0 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--neutral-900);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border-20);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) ease-out;
}

.form-textarea {
  height: auto;
  min-height: 120px;
  padding: 1rem 1.25rem;
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid var(--primary-500);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* Results Display */
.result-display {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border-15);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
  font-size: 1rem;
  word-break: break-all;
  position: relative;
}

.result-display.success {
  border-color: var(--success-500);
  background: rgba(16, 185, 129, 0.1);
}

.result-display.error {
  border-color: var(--error-500);
  background: rgba(239, 68, 68, 0.1);
}

/* Copy Button */
.copy-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
}

/* Sections */
.section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

/* Footer */
.footer {
  background: var(--glass-white-35);
  backdrop-filter: blur(20px) saturate(150%);
  border-top: 1px solid var(--glass-border-20);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--neutral-900);
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--neutral-700);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--duration-fast) ease-out;
}

.footer-links a:hover {
  color: var(--primary-500);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--glass-border-20);
  color: var(--neutral-500);
  font-size: 0.875rem;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.hidden { display: none; }
.visible { display: block; }

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
}

@media (max-width: 768px) {
  .navbar-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
}