/* ========================================
   APRENDER ENSINANDO - Sistema de Gestão
   ======================================== */

:root {
  /* Cores Neutras Profissionais */
  --primary: #2c3e50;
  --primary-dark: #1a252f;
  --primary-light: #34495e;
  
  --secondary: #95a5a6;
  --secondary-dark: #7f8c8d;
  --secondary-light: #bdc3c7;
  
  --accent: #3498db;
  --accent-dark: #2980b9;
  
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #3498db;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #ecf0f1;
  
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --text-light: #95a5a6;
  
  --border-color: #dfe6e9;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
  
  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.container-fluid {
  width: 100%;
  padding: 20px;
}

/* Header */
.header {
  background: var(--primary);
  color: white;
  padding: 1rem 0;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

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

.nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav a:hover {
  background: var(--primary-light);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-name {
  color: var(--secondary-light);
}

.btn-logout {
  background: var(--danger);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.btn-logout:hover {
  opacity: 0.9;
}

/* Cards */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-header {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--bg-tertiary);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary);
}

.card-body {
  padding: 0;
}

/* Grid */
.grid {
  display: grid;
  gap: 1.5rem;
}

.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));
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-label.required::after {
  content: " *";
  color: var(--danger);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-control:disabled {
  background: var(--bg-tertiary);
  cursor: not-allowed;
}

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

select.form-control {
  cursor: pointer;
}

.form-text {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.5;
}

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

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--secondary-dark);
}

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

.btn-success:hover:not(:disabled) {
  opacity: 0.9;
}

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

.btn-danger:hover:not(:disabled) {
  opacity: 0.9;
}

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

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

.btn-block {
  display: block;
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
}

.stat-card.success {
  border-left-color: var(--success);
}

.stat-card.warning {
  border-left-color: var(--warning);
}

.stat-card.danger {
  border-left-color: var(--danger);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-icon {
  font-size: 2rem;
  opacity: 0.2;
  float: right;
}

/* Table */
.table-responsive {
  overflow-x: auto;
  margin-top: 1rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-primary);
}

.table thead {
  background: var(--bg-tertiary);
}

.table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--primary);
  border-bottom: 2px solid var(--border-color);
}

.table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
  background: var(--bg-secondary);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.badge-warning {
  background: var(--warning);
  color: white;
}

.badge-danger {
  background: var(--danger);
  color: white;
}

.badge-info {
  background: var(--info);
  color: white;
}

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

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  border-left: 4px solid;
}

.alert-success {
  background: rgba(39, 174, 96, 0.1);
  border-color: var(--success);
  color: var(--success);
}

.alert-warning {
  background: rgba(243, 156, 18, 0.1);
  border-color: var(--warning);
  color: var(--warning);
}

.alert-danger {
  background: rgba(231, 76, 60, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

.alert-info {
  background: rgba(52, 152, 219, 0.1);
  border-color: var(--info);
  color: var(--info);
}

/* Loading */
.loading {
  text-align: center;
  padding: 2rem;
}

.spinner {
  border: 3px solid var(--bg-tertiary);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

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

/* Login Page */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-card {
  width: 100%;
  max-width: 400px;
  padding: 2rem;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-title {
  font-size: 1.75rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

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

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav {
    flex-direction: column;
    width: 100%;
  }
  
  .nav a {
    width: 100%;
    text-align: center;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .table {
    font-size: 0.875rem;
  }
  
  .table th,
  .table td {
    padding: 0.5rem;
  }
}

@media print {
  .header,
  .nav,
  .btn,
  .no-print {
    display: none !important;
  }
  
  body {
    background: white;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid var(--border-color);
  }
}