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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  line-height: 1.6;
  min-height: 100vh;
}

/* Container principal */
.main-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  background: rgb(32, 36, 32);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: #4f46e5;
  text-decoration: none;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.back-link:hover {
  background: #4f46e5;
  color: white;
  transform: translateX(-2px);
}

/* Menu do usuário */
.usuario-menu {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 12px;
  transition: all 0.3s ease;
}

.usuario-menu:hover {
  background: rgba(79, 70, 229, 0.1);
}

.foto-perfil {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #4f46e5;
  transition: all 0.3s ease;
}

.usuario-menu:hover .foto-perfil {
  transform: scale(1.05);
}

.usuario-menu span {
  font-weight: 600;
  color: white;
}

.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  min-width: 200px;
  margin-top: 0.5rem;
  overflow: hidden;
  z-index: 1000;
}

.usuario-menu.ativo .dropdown {
  display: block;
  animation: fadeInDown 0.3s ease;
}

.dropdown a {
  display: block;
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: black;
  font-weight: 500;
  transition: all 0.3s ease;
  border-bottom: 1px solid #f3f4f6;
}

.dropdown a:last-child {
  border-bottom: none;
}

.dropdown a:hover {
  background: #4f46e5;
  color: white;
  transform: translateX(4px);
}

/* Main content */
main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

/* Cards */
.card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(0, 0, 0, 0.15);
}

/* Títulos */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 2rem;
  text-align: center;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: #374151;
  margin: 2rem 0 1rem 0;
  padding-left: 1rem;
  border-left: 4px solid #4f46e5;
}

/* Formulários */
.form-container {
  max-width: 500px;
  margin: 0 auto;
  background: white;
  color: white;
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #374151;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: #f9fafb;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: #4f46e5;
  background: white;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  min-width: 120px;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
  background: #6b7280;
  color: white;
}

.btn-secondary:hover {
  background: #4b5563;
  transform: translateY(-2px);
}

.btn-success {
  background: #10b981;
  color: white;
}

.btn-success:hover {
  background: #059669;
  transform: translateY(-2px);
}

.btn-danger {
  background: #ef4444;
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
  transform: translateY(-2px);
}

/* Alertas */
.alert {
  padding: 1rem 1.5rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.alert-error {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.alert-success {
  background: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

/* Grid de aulas */
.aulas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.aula-card {
  background: white;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.aula-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #4f46e5, #7c3aed);
}

.aula-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
}

.aula-card.concluida {
  border-color: #10b981;
}

.aula-card.concluida::before {
  background: #10b981;
}

.aula-card.incorreta {
  border-color: #ef4444;
}

.aula-card.incorreta::before {
  background: #ef4444;
}

.aula-titulo {
  font-size: 1.25rem;
  font-weight: 600;
  color: black;
  margin-bottom: 0.75rem;
  text-decoration: none;
}

.aula-titulo:hover {
  color: #4f46e5;
}

.aula-descricao {
  color: black;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.status-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
}

/* Tabelas */
.table-container {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: #f8fafc;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: #374151;
  border-bottom: 2px solid #e5e7eb;
}

td {
  padding: 1rem;
  border-bottom: 1px solid #f3f4f6;
}

tr:hover {
  background: #f8fafc;
}

/* Barra de progresso */
.progress-container {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  text-align: center;
  margin-bottom: 2rem;
}

.progress-bar {
  background: #e5e7eb;
  border-radius: 50px;
  height: 12px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #4f46e5, #10b981);
  border-radius: 50px;
  transition: width 0.8s ease;
  position: relative;
}

.progress-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 0.5rem;
}

/* Editor de código */
.editor-container {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  margin: 1rem 0;
}

/* Quiz options */
.quiz-options {
  margin: 1.5rem 0;
}

.quiz-option {
  background: white;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quiz-option input[type="radio"] {
  width: 20px;
  height: 20px;
  accent-color: #4f46e5;
}

/* Vídeo container */
.video-container {
  background: white;
  border-radius: 16px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.video-container iframe {
  width: 100%;
  height: 400px;
  border-radius: 12px;
}

/* Responsividade */
@media (max-width: 768px) {
  main {
    padding: 1rem;
  }

  .form-container {
    padding: 2rem 1.5rem;
  }

  h1 {
    font-size: 2rem;
  }

  .aulas-grid {
    grid-template-columns: 1fr;
  }

  .usuario-menu span {
    display: none;
  }

  header nav {
    padding: 1rem;
  }
}

/* Animações */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  animation: fadeInUp 0.6s ease;
}

/* Utilitários */
.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}
.text-right {
  text-align: right;
}
.mb-1 {
  margin-bottom: 0.5rem;
}
.mb-2 {
  margin-bottom: 1rem;
}
.mb-3 {
  margin-bottom: 1.5rem;
}
.mt-1 {
  margin-top: 0.5rem;
}
.mt-2 {
  margin-top: 1rem;
}
.mt-3 {
  margin-top: 1.5rem;
}

/* Estilos específicos para páginas administrativas */
.admin-form {
  max-width: 700px;
  margin: 0 auto;
}

.form-section {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.form-section h3 {
  color: #374151;
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  border-bottom: 2px solid #f3f4f6;
  padding-bottom: 0.75rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.form-row.full {
  grid-template-columns: 1fr;
}

.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #8b5cf6, #a855f7);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.preview-section {
  background: #f8fafc;
  border: 2px dashed #cbd5e1;
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.preview-section h4 {
  color: #475569;
  margin-bottom: 1rem;
  font-size: 1rem;
  font-weight: 600;
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .admin-form {
    padding: 1rem;
  }
}