/* ========================================
   ExploreGTA6 - CSS Central
   Mobile-First Design System
======================================== */

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

/* ========================================
   CSS Variables - Design System
======================================== */
:root {
  /* Cores Principais - Tema GTA VI/Vice City */
  --color-primary: #FF007F;
  --color-primary-dark: #E6006B;
  --color-primary-light: #FF4DA6;
  --color-secondary: #00BFFF;
  --color-secondary-dark: #0099CC;
  --color-accent: #FECA57;
  
  /* Cores Funcionais */
  --color-success: #48dbfb;
  --color-danger: #ff6b6b;
  --color-warning: #ffeaa7;
  --color-info: #74b9ff;
  
  /* Backgrounds */
  --bg-main: #f6f6f6;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-lighter: #e9ecef;
  --bg-dark: #2c3e50;
  --bg-gradient: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  
  /* Textos */
  --text-dark: #333333;
  --text-medium: #666666;
  --text-light: #999999;
  --text-lighter: #cccccc;
  
  /* Bordas */
  --border-light: #e9ecef;
  --border-medium: #dee2e6;
  --border-dark: #adb5bd;
  
  /* Sombras */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);
  --shadow-2xl: 0 20px 64px rgba(0,0,0,0.2);
  
  /* Raios de Borda */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Espaçamentos */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* Tipografia */
  --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 10px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 32px;
  
  /* Layout */
  --header-height: 60px;
  --sidebar-width: 320px;
  --footer-height: 80px;
  --content-max-width: 1200px;
  
  /* Z-indexes */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 10000;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-main);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Tipografia
======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-medium);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* ========================================
   Layout Base
======================================== */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.main-content {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
  padding: var(--spacing-lg) 0;
}

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

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

.section-title {
  color: var(--color-primary);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  color: var(--text-medium);
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: 0 auto;
}

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

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.flex {
  display: flex;
}

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

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

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

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* ========================================
   Componentes de Botão
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 44px;
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--color-secondary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-secondary-dark);
  transform: translateY(-2px);
}

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

.btn-outline:hover:not(:disabled) {
  background: var(--color-primary);
  color: white;
}

.btn-ghost {
  background: transparent;
  color: var(--text-medium);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-light);
  color: var(--text-dark);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

.btn-full {
  width: 100%;
}

/* ========================================
   Componentes de Card
======================================== */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-light);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  background: var(--bg-light);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

/* ========================================
   Header Universal
======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  z-index: var(--z-fixed);
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--spacing-md);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.menu-toggle {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-dark);
}

.menu-toggle:hover {
  background: var(--color-primary);
  color: white;
  transform: scale(1.05);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--bg-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.logo-text h1 {
  color: var(--text-dark);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin: 0;
}

.logo-text .subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  display: none;
}

.header-nav {
  display: none;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-medium);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(255, 0, 127, 0.1);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--bg-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.user-avatar:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.auth-buttons {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-login {
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-primary);
  font-weight: 500;
}

.btn-register {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-gradient);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 500;
}

/* ========================================
   Sidebar/Navigation
======================================== */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(2px);
}

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

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100%;
  background: var(--bg-white);
  z-index: var(--z-modal);
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-xl);
}

.sidebar.active {
  transform: translateX(0);
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-gradient);
  color: white;
}

.sidebar-header h3 {
  margin: 0;
  color: white;
}

.sidebar-nav {
  padding: var(--spacing-lg) 0;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-dark);
  border-left: 3px solid transparent;
  transition: all 0.3s ease;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
  color: var(--color-primary);
  background: rgba(255, 0, 127, 0.05);
  border-left-color: var(--color-primary);
}

.sidebar-nav hr {
  border: none;
  height: 1px;
  background: var(--border-light);
  margin: var(--spacing-md) var(--spacing-lg);
}

/* ========================================
   Forms
======================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  color: var(--text-dark);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: all 0.3s ease;
  min-height: 44px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(0, 191, 255, 0.1);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-error {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Badges e Tags
======================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary { background: var(--color-primary); color: white; }
.badge-secondary { background: var(--color-secondary); color: white; }
.badge-success { background: var(--color-success); color: white; }
.badge-warning { background: var(--color-warning); color: var(--text-dark); }
.badge-danger { background: var(--color-danger); color: white; }
.badge-info { background: var(--color-info); color: white; }

.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-light);
  color: var(--text-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all 0.3s ease;
}

.tag:hover {
  background: var(--color-primary);
  color: white;
}

/* ========================================
   Toast Notifications
======================================== */
.toast {
  position: fixed;
  top: calc(var(--header-height) + var(--spacing-md));
  left: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  color: var(--text-dark);
  z-index: var(--z-toast);
  transform: translateY(-150%);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.toast.show {
  transform: translateY(0);
}

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

.toast-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  margin-left: auto;
  padding: var(--spacing-xs);
}

/* ========================================
   Modal System
======================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
  backdrop-filter: blur(4px);
  padding: var(--spacing-md);
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
  animation: modalEnter 0.3s ease;
}

@keyframes modalEnter {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-gradient);
  color: white;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal-title {
  font-weight: 600;
  font-size: var(--font-size-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: white;
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  opacity: 0.8;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
  opacity: 1;
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  background: var(--bg-light);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ========================================
   Stats e Métricas
======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.stat-card {
  background: var(--bg-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-medium);
  font-weight: 500;
}

.stat-trend {
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.stat-trend.up { color: var(--color-success); }
.stat-trend.down { color: var(--color-danger); }

/* ========================================
   User Profile Elements
======================================== */
.user-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.user-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.user-avatar-lg {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background: var(--bg-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
  font-weight: 600;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.user-info h4 {
  margin: 0 0 var(--spacing-xs) 0;
  color: var(--color-primary);
}

.user-info p {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--text-light);
}

.user-level {
  background: var(--color-accent);
  color: var(--text-dark);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-left: auto;
}

/* ========================================
   Floating Action Button
======================================== */
.fab {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--bg-gradient);
  border: none;
  color: white;
  font-size: var(--font-size-xl);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-fixed);
  display: flex;
  align-items: center;
  justify-content: center;
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl);
}

.fab:active {
  transform: scale(0.95);
}

/* ========================================
   Utilitários
======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.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); }

.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); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

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

/* ========================================
   Loading States
======================================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  color: var(--text-light);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-top: 2px solid var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
  margin-right: var(--spacing-sm);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-light) 25%, var(--bg-lighter) 50%, var(--bg-light) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: var(--radius-md);
}

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

.skeleton-text {
  height: 16px;
  margin-bottom: var(--spacing-sm);
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: var(--spacing-md);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

/* ========================================
   Progress Bars
======================================== */
.progress {
  width: 100%;
  height: 8px;
  background: var(--bg-lighter);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: var(--spacing-sm) 0;
}

.progress-bar {
  height: 100%;
  background: var(--bg-gradient);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
  position: relative;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background-image: linear-gradient(
    -45deg,
    rgba(255, 255, 255, 0.2) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 75%,
    transparent 75%,
    transparent
  );
  background-size: 30px 30px;
  animation: progress-stripes 1s linear infinite;
}

@keyframes progress-stripes {
  0% { background-position: 0 0; }
  100% { background-position: 30px 0; }
}

/* ========================================
   Responsive Design
======================================== */

/* Tablet */
@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .header-nav {
    display: flex;
  }
  
  .logo-text .subtitle {
    display: block;
  }
  
  .modal {
    max-width: 600px;
  }
  
  .grid-responsive {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .menu-toggle {
    display: none;
  }
  
  .sidebar {
    transform: translateX(0);
    position: fixed;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    box-shadow: var(--shadow-md);
  }
  
  .sidebar-overlay {
    display: none;
  }
  
  .main-content {
    margin-left: var(--sidebar-width);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
  
  .grid-responsive {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .modal {
    max-width: 700px;
  }
}

/* Large Desktop */
@media (min-width: 1200px) {
  .grid-responsive {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

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

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

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.8; }
  100% { transform: scale(1); opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.5s ease;
}

.slide-in-left {
  animation: slideInLeft 0.5s ease;
}

.slide-in-right {
  animation: slideInRight 0.5s ease;
}

.pulse-animation {
  animation: pulse 2s infinite;
}

/* ========================================
   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:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 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;
    scroll-behavior: auto !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-light: #000000;
    --text-light: #000000;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
  }
}

/* Dark mode support (futuro) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-main: #1a1a1a;
    --bg-white: #2d2d2d;
    --bg-light: #3a3a3a;
    --bg-lighter: #4a4a4a;
    --text-dark: #ffffff;
    --text-medium: #cccccc;
    --text-light: #999999;
    --border-light: #4a4a4a;
    --border-medium: #666666;
  }
}

/* ========================================
   Print Styles
======================================== */
@media print {
  .header,
  .sidebar,
  .fab,
  .toast,
  .modal-overlay {
    display: none !important;
  }
  
  .main-content {
    margin: 0 !important;
  }
  
  * {
    box-shadow: none !important;
    color: #000 !important;
    background: #fff !important;
  }
  
  .btn {
    border: 1px solid #000 !important;
  }
}

/* ========================================
   Custom Scrollbar
======================================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

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

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

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) var(--bg-light);
}

/* ========================================
   Mobile Specific Styles
======================================== */
@media (max-width: 767px) {
  /* Increase touch targets on mobile */
  .btn {
    min-height: 48px;
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .nav-link {
    min-height: 48px;
    display: flex;
    align-items: center;
  }
  
  /* Better mobile typography */
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }
  
  /* Mobile-friendly modals */
  .modal {
    margin: var(--spacing-md);
    max-height: calc(100vh - var(--spacing-lg));
  }
  
  /* Mobile-friendly forms */
  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px; /* Prevent zoom on iOS */
  }
  
  /* Better mobile grid */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* iOS specific fixes */
@supports (-webkit-touch-callout: none) {
  .btn,
  .form-input,
  .form-select {
    -webkit-appearance: none;
    border-radius: var(--radius-lg);
  }
}

/* Android specific fixes */
@media screen and (-webkit-min-device-pixel-ratio: 0) and (min-resolution: 0.001dpcm) {
  .btn {
    background-clip: padding-box;
  }
}