/* ============================================
   GByte Informática - Estilos Principais
   ============================================ */

/* Variáveis CSS */
:root {
  /* Cores Primárias */
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-primary-dark: #020617;
  
  /* Cores Secundárias */
  --color-secondary: #3b82f6;
  --color-secondary-light: #60a5fa;
  --color-secondary-dark: #2563eb;
  
  /* Cores de Accent */
  --color-accent: #f59e0b;
  --color-accent-light: #fbbf24;
  --color-accent-dark: #d97706;
  
  /* Cores de Status */
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  
  /* Cores Neutras */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  
  /* Tipografia */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Poppins', sans-serif;
  
  /* Tamanhos de Fonte */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Espaçamento */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Bordas */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Sombras */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  /* Transições */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Layout */
  --container-max: 1280px;
  --header-height: 70px;
}

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Tipografia */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-gray-600);
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utilitários */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }

.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-light { background-color: var(--color-gray-100); }

/* ============================================
   Header e Navegação
   ============================================ */
#app-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  height: var(--header-height);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-white);
}

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

.logo-icon {
  font-size: var(--text-3xl);
}

.logo-text span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-8);
}

.nav-links a {
  color: var(--color-gray-300);
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-white);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.search-btn,
.cart-btn,
.mobile-menu-btn {
  background: transparent;
  border: none;
  color: var(--color-gray-300);
  font-size: var(--text-xl);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.search-btn:hover,
.cart-btn:hover,
.mobile-menu-btn:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.cart-btn {
  position: relative;
}

.cart-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 600;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-btn {
  display: none;
}

/* ============================================
   Main Content Area
   ============================================ */
#app,
.app-container {
  flex: 1;
  min-height: calc(100vh - var(--header-height) - 300px);
}

.section {
  padding: var(--space-12) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title h2 {
  margin-bottom: var(--space-4);
}

.section-title p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-gray-600);
}

/* ============================================
   Footer
   ============================================ */
#app-footer {
  background: var(--color-primary);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-section h3,
.footer-section h4 {
  color: var(--color-white);
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
}

.footer-section p {
  color: var(--color-gray-400);
  line-height: 1.8;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--space-3);
}

.footer-section ul li a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--color-accent);
}

.social-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  color: var(--color-gray-300);
  font-size: var(--text-xl);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-3px);
}

.contact-info li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-gray-400);
}

.footer-bottom {
  border-top: 1px solid var(--color-primary-light);
  padding-top: var(--space-8);
  text-align: center;
}

.footer-bottom p {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

/* ============================================
   Botões
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

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

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

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

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

.btn-outline:hover {
  background: var(--color-secondary);
  color: var(--color-white);
}

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

.btn-outline-light:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ============================================
   Formulários
   ============================================ */
.form-group {
  margin-bottom: var(--space-6);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
  color: var(--color-gray-700);
}

.form-control,
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  transition: border-color var(--transition-fast);
}

.form-control:focus,
.input:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder,
.input::placeholder {
  color: var(--color-gray-400);
}

textarea.form-control,
textarea.input {
  min-height: 120px;
  resize: vertical;
}

select.form-control,
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* ============================================
   Loading e Animações
   ============================================ */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-secondary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

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

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

/* ============================================
   Breadcrumbs
   ============================================ */
.breadcrumb,
.breadcrumbs {
  padding: var(--space-4) 0;
  margin-bottom: var(--space-8);
}

.breadcrumb a,
.breadcrumbs a {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumbs a:hover {
  color: var(--color-secondary);
}

.breadcrumb > *,
.breadcrumbs > * {
  display: inline;
}

.breadcrumbs ul {
  display: flex;
  list-style: none;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.breadcrumbs li:not(:last-child)::after {
  content: '/';
  margin-left: var(--space-2);
  color: var(--color-gray-400);
}

.breadcrumbs li:last-child {
  color: var(--color-gray-700);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* ============================================
    Seções
    ============================================ */
.section {
  padding: var(--space-16) 0;
}

.section-light {
  background: var(--color-white);
}

.section-gray {
  background: var(--color-gray-100);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-gray-500);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title h2 {
  margin-bottom: var(--space-4);
}

.section-title p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-gray-500);
}