/* Modern UI - Gradients, Glassmorphism & Core Styles */

/* ===== CSS Variables ===== */
:root {
  /* Primary Colors */
  --primary-indigo: #6366f1;
  --primary-purple: #8b5cf6;
  --primary-pink: #ec4899;

  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
  --gradient-dark: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.95);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

  /* Dark Mode */
  --dark-bg: #1a202c;
  --dark-card: #2d3748;
  --dark-border: #4a5568;
  --dark-text: #e2e8f0;

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

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;

  /* 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, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
               Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a202c;
  background: var(--gradient-primary);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* ===== Glassmorphism Effects ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass-dark {
  background: rgba(26, 32, 44, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

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

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

/* ===== Navigation Header ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  margin-bottom: var(--spacing-lg);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

.navbar-brand-icon {
  font-size: 2rem;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ===== Grid System ===== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

.fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

.slide-in {
  animation: slideIn var(--transition-base) ease-out;
}

/* ===== 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); }

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

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

/* ===== Dark Mode Support ===== */
body.dark-mode {
  background: var(--gradient-dark);
  color: var(--dark-text);
}

body.dark-mode .glass {
  background: rgba(45, 55, 72, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4,
body.dark-mode h5,
body.dark-mode h6 {
  color: var(--dark-text);
}

body.dark-mode .navbar {
  background: var(--dark-card);
  border-bottom-color: var(--dark-border);
}

body.dark-mode .section {
  background: transparent;
}

body.dark-mode .btn-outline {
  border-color: var(--dark-border);
  color: var(--dark-text);
}

body.dark-mode .btn-outline:hover {
  background: var(--dark-card);
  border-color: var(--primary-indigo);
  color: var(--primary-indigo);
}

body.dark-mode .btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--dark-text);
}

body.dark-mode .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

body.dark-mode .badge-primary {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
}

body.dark-mode .badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
}

body.dark-mode .badge-warning {
  background: rgba(245, 158, 11, 0.2);
  color: #fcd34d;
}

body.dark-mode .badge-error {
  background: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
}

body.dark-mode .badge-info {
  background: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
}

body.dark-mode .tab {
  color: #9ca3af;
  border-bottom-color: transparent;
}

body.dark-mode .tab:hover {
  color: var(--primary-indigo);
  background: rgba(99, 102, 241, 0.1);
}

body.dark-mode .tab.active {
  color: var(--primary-indigo);
  border-bottom-color: var(--primary-indigo);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  :root {
    font-size: 14px;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }

  .navbar-content {
    flex-direction: column;
    text-align: center;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}

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

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-purple);
}

/* ===== Selection Styling ===== */
::selection {
  background: var(--primary-purple);
  color: white;
}

::-moz-selection {
  background: var(--primary-purple);
  color: white;
}