:root {
  /* Color Scheme - Red Accent with Light Background */
  --color-bg-primary: #f5f5f0;
  --color-bg-secondary: #ffffff;
  --color-bg-tertiary: #e8e8e3;
  --color-bg-elevated: #fafaf8;

  --color-accent: #dc2626;
  --color-accent-dark: #b91c1c;
  --color-accent-dark: #b91c1c;
  --color-accent-light: #ef4444;

  /* Admin Accents */
  --color-accent-blue: #2563eb;
  --color-accent-blue-dark: #1d4ed8;

  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-text-muted: #6b6b6b;

  --color-border: #d4d4d0;
  --color-border-light: #e5e5e0;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Montserrat', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px rgba(220, 38, 38, 0.2);

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

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

html {
  scroll-behavior: smooth;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3.5rem;
  color: var(--color-text-primary);
}

h2 {
  font-size: 2.5rem;
  color: var(--color-text-primary);
}

h3 {
  font-size: 1.75rem;
  color: var(--color-accent);
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

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

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

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

nav {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  transition: color var(--transition-base);
}

.logo-link {
  text-decoration: none;
  color: inherit;
}

.logo-link:hover .logo {
  color: var(--color-accent-light);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  position: relative;
}

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

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

.nav-links a:hover::after {
  width: 80%;
}

/* Header Controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.icon-button {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
}

.icon-button:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.icon-button .lang-text {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.icon-button:hover .lang-text {
  color: var(--color-accent);
}

.theme-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  transition: transform var(--transition-base);
}

.icon-button:hover .theme-icon {
  transform: scale(1.1);
}



/* Main Container */
main {
  margin-top: 80px;
  max-width: 1600px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

/* Section Styles */
section {
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0;
}

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

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

/* Card Component */
.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}



.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}



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

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Button Component */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  font-family: var(--font-body);
  font-size: 1rem;
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
  background: var(--color-accent);
  color: #ffffff;
}

/* Tag Component */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--color-accent);
  color: #ffffff;
  cursor: pointer;
}

/* Input Component */
.input-group {
  margin-bottom: var(--spacing-md);
}

.input-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
}

.input {
  width: 100%;
  padding: var(--spacing-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

select.input {
  cursor: pointer;
}

/* Loading Animation */
@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Fade In Animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  /* Mobile Header Optimization */
  header {
    padding: 0.5rem 0;
  }

  nav {
    padding: 0 1rem;
  }

  .logo {
    font-size: 1rem !important;
    font-weight: 400 !important;
  }

  .nav-links {
    gap: 0.5rem;
    font-size: 0.85rem;
  }

  .nav-links a {
    padding: 0.25rem 0.5rem;
  }

  .icon-button {
    min-width: 36px;
    height: 36px;
    padding: 0.25rem 0.5rem;
    font-size: 1rem;
  }

  .icon-button .lang-text {
    font-size: 0.75rem;
  }

  .theme-icon {
    width: 20px;
    height: 20px;
  }

  main {
    margin-top: 60px;
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  section {
    padding: var(--spacing-lg) 0;
  }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}