:root {
  /* Modern Dark Theme with Vibrant Accents */
  --primary-50: #e3f2fd;
  --primary-100: #bbdefb;
  --primary-200: #90caf9;
  --primary-300: #64b5f6;
  --primary-400: #42a5f5;
  --primary-500: #2196f3;
  --primary-600: #1e88e5;
  --primary-700: #1976d2;
  --primary-800: #1565c0;
  --primary-900: #0d47a1;

  --accent: #00e676;
  --accent-dark: #00c853;
  --accent-light: #69f0ae;

  --success: #4caf50;
  --warning: #ffa726;
  --error: #ef5350;
  --info: #29b6f6;

  /* Dark Theme Colors */
  --bg-primary: #0a0e27;
  --bg-secondary: #151a30;
  --bg-card: #1a1f3a;
  --bg-card-hover: #1f2540;

  --text-primary: #ffffff;
  --text-secondary: #b0b8d4;
  --text-disabled: #6b7280;

  /* Gradient Backgrounds */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-dark: linear-gradient(135deg, #1a1f3a 0%, #0a0e27 100%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.5);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

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

html,
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg-secondary);
  color: var(--text-primary);
  overflow-x: hidden;
}

body {
  max-width: 100vw;
  min-height: 100vh;
  padding-bottom: 80px;
  /* Space for bottom nav */
}

/* Mobile First - Optimized for 360px-480px */
@media (min-width: 768px) {
  body {
    max-width: 480px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
  }
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-700);
}

/* Button Styles - Material Design */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--gradient-accent);
  color: white;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-600);
  color: var(--primary-600);
  box-shadow: none;
}

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

/* Card Styles */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.card-header {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-100);
}

.card-body {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Container */
.container {
  padding: 16px;
  max-width: 100%;
}

/* Page Header */
.page-header {
  background: var(--gradient-primary);
  color: white;
  padding: 24px 16px;
  margin: -16px -16px 16px -16px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0;
}

.page-subtitle {
  font-size: 14px;
  opacity: 0.9;
  margin-top: 4px;
}

/* Input Styles */
.input-group {
  margin-bottom: 20px;
}

.input-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--primary-100);
  border-radius: var(--radius-md);
  font-size: 16px;
  background: var(--bg-card);
  color: var(--text-primary);
  transition: var(--transition);
}

.input:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--primary-100);
  color: var(--primary-800);
}

.badge-success {
  background: #e8f5e9;
  color: #2e7d32;
}

.badge-warning {
  background: #fff3e0;
  color: #e65100;
}

.badge-error {
  background: #ffebee;
  color: #c62828;
}

/* Progress Bar */
.progress {
  width: 100%;
  height: 8px;
  background: var(--primary-100);
  border-radius: 4px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-600) 0%, var(--accent) 100%);
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-around;
  padding: 8px 0 12px 0;
  z-index: 1000;
  border-top: 1px solid var(--primary-100);
}

@media (min-width: 768px) {
  .bottom-nav {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%);
  }
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1;
  padding: 8px;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  background: transparent;
}

.nav-item.active {
  color: var(--primary-600);
}

.nav-item:active {
  transform: scale(0.95);
}

.nav-icon {
  font-size: 24px;
}

.nav-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Loading Spinner */
.spinner {
  border: 3px solid var(--primary-100);
  border-top-color: var(--primary-600);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 0.8s linear infinite;
}

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

.loading-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

/* Ripple Effect */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.ripple:active::after {
  width: 200px;
  height: 200px;
}

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

.text-right {
  text-align: right;
}

.text-bold {
  font-weight: 700;
}

.text-sm {
  font-size: 12px;
}

.text-lg {
  font-size: 18px;
}

.text-xl {
  font-size: 24px;
}

.mt-1 {
  margin-top: 8px;
}

.mt-2 {
  margin-top: 16px;
}

.mt-3 {
  margin-top: 24px;
}

.mb-1 {
  margin-bottom: 8px;
}

.mb-2 {
  margin-bottom: 16px;
}

.mb-3 {
  margin-bottom: 24px;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-center {
  justify-content: center;
  align-items: center;
}

.flex-between {
  justify-content: space-between;
}

.gap-1 {
  gap: 8px;
}

.gap-2 {
  gap: 16px;
}

.gap-3 {
  gap: 24px;
}

.grid {
  display: grid;
  gap: 16px;
}

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

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }

  to {
    transform: translateY(0);
  }
}

.slide-up {
  animation: slideUp 0.3s ease-out;
}