/**
 * EDUGUARDIAN - Estilos Minimalistas
 * Versión: 1.0
 */

/* ===== VARIABLES CSS ===== */
:root {
  /* Colores primarios */
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #64748b;
  
  /* Colores semánticos */
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  
  /* Neutrales */
  --text: #1e293b;
  --text-light: #64748b;
  --bg: #ffffff;
  --bg-gray: #f8fafc;
  --border: #e2e8f0;
  
  /* Espaciado */
  --spacing: 8px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.1);
  
  /* Tipografía */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== RESET Y BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg-gray);
}

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

a:hover {
  text-decoration: underline;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing) * 2);
}

.main {
  min-height: calc(100vh - 140px);
  padding: calc(var(--spacing) * 4) 0;
}

/* ===== HEADER ===== */
.header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--spacing) * 2) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.nav {
  display: flex;
  gap: calc(var(--spacing) * 3);
  align-items: center;
}

.nav a {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  padding: calc(var(--spacing)) calc(var(--spacing) * 2);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.nav a:hover {
  background: var(--bg-gray);
  text-decoration: none;
}

.user-menu {
  display: flex;
  gap: calc(var(--spacing) * 2);
  align-items: center;
  padding-left: calc(var(--spacing) * 3);
  border-left: 1px solid var(--border);
}

.btn-logout {
  color: var(--danger) !important;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: calc(var(--spacing) * 3) 0;
  text-align: center;
  color: var(--text-light);
  font-size: 14px;
}

/* ===== ALERTAS ===== */
.alert {
  padding: calc(var(--spacing) * 2);
  border-radius: var(--radius);
  margin-bottom: calc(var(--spacing) * 3);
  border-left: 4px solid;
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 2);
}

.alert.success {
  background: #d1fae5;
  border-color: var(--success);
  color: #065f46;
}

.alert.error {
  background: #fee2e2;
  border-color: var(--danger);
  color: #991b1b;
}

.alert.warning {
  background: #fef3c7;
  border-color: var(--warning);
  color: #92400e;
}

.alert.info {
  background: #dbeafe;
  border-color: var(--info);
  color: #1e40af;
}

/* ===== BOTONES ===== */
.btn {
  display: inline-block;
  padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 3);
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  text-decoration: none;
}

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

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

.btn-sm {
  padding: calc(var(--spacing)) calc(var(--spacing) * 2);
  font-size: 13px;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--spacing) * 3);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--spacing) * 3);
}

.card h3, .card h4 {
  margin-bottom: calc(var(--spacing) * 2);
}

/* ===== FORMULARIOS ===== */
.form-group {
  margin-bottom: calc(var(--spacing) * 3);
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: var(--spacing);
  color: var(--text);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: calc(var(--spacing) * 1.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font-sans);
  transition: border-color 0.2s;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
}

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

/* ===== PÁGINA DE AUTENTICACIÓN ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: calc(var(--spacing) * 2);
}

.auth-container {
  width: 100%;
  max-width: 440px;
}

.auth-card {
  background: var(--bg);
  padding: calc(var(--spacing) * 5);
  border-radius: calc(var(--radius) * 2);
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.auth-title {
  text-align: center;
  margin-bottom: calc(var(--spacing));
  color: var(--primary);
  font-size: 28px;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: calc(var(--spacing) * 4);
  font-size: 14px;
}

.auth-form {
  margin-bottom: calc(var(--spacing) * 3);
}

.auth-footer {
  text-align: center;
  color: var(--text-light);
  font-size: 14px;
}

.demo-credentials {
  margin-top: calc(var(--spacing) * 4);
  padding: calc(var(--spacing) * 2);
  background: var(--bg-gray);
  border-radius: var(--radius);
  font-size: 12px;
}

.demo-credentials ul {
  list-style: none;
  margin-top: var(--spacing);
}

.demo-credentials li {
  padding: calc(var(--spacing) / 2) 0;
  font-family: monospace;
}

/* ===== DASHBOARD ===== */
.dashboard-header {
  margin-bottom: calc(var(--spacing) * 4);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dashboard-header h2 {
  font-size: 28px;
  color: var(--text);
}

.subtitle {
  color: var(--text-light);
  font-size: 14px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing) * 3);
  margin-bottom: calc(var(--spacing) * 4);
}

.stat-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--spacing) * 3);
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 2);
  box-shadow: var(--shadow);
}

.stat-card.alert-card {
  border-left: 4px solid var(--warning);
}

.stat-icon {
  font-size: 32px;
}

.stat-content h3 {
  font-size: 32px;
  margin: 0;
  color: var(--text);
}

.stat-content p {
  color: var(--text-light);
  font-size: 14px;
  margin: 0;
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: calc(var(--spacing) * 2);
}

.stat-label {
  font-size: 14px;
  color: var(--text-light);
  font-weight: 600;
}

.stat-limit {
  font-size: 12px;
  color: var(--text-light);
}

.stat-value {
  font-size: 42px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: calc(var(--spacing) * 2);
}

.stat-footer {
  font-size: 13px;
  color: var(--text-light);
  margin-top: calc(var(--spacing));
}

/* ===== SECCIONES ===== */
.section {
  margin-bottom: calc(var(--spacing) * 5);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: calc(var(--spacing) * 3);
}

.section-header h3 {
  font-size: 20px;
  color: var(--text);
}

/* ===== PROGRESS BAR ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-gray);
  border-radius: 4px;
  overflow: hidden;
  margin: calc(var(--spacing) * 2) 0;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s;
}

.progress-text {
  font-size: 13px;
  color: var(--text-light);
  margin-top: var(--spacing);
}

/* ===== GRIDS ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: calc(var(--spacing) * 3);
}

.curso-card h4 {
  color: var(--text);
  margin-bottom: var(--spacing);
}

.text-muted {
  color: var(--text-light);
  font-size: 14px;
}

/* ===== ESTADO VACÍO ===== */
.empty-state {
  text-align: center;
  padding: calc(var(--spacing) * 6) calc(var(--spacing) * 2);
  background: var(--bg);
  border-radius: var(--radius);
  border: 2px dashed var(--border);
}

.empty-state p {
  color: var(--text-light);
  margin-bottom: calc(var(--spacing) * 3);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: calc(var(--spacing) * 2);
}

.empty-chat {
  text-align: center;
  padding: calc(var(--spacing) * 8) calc(var(--spacing) * 2);
}

.empty-chat h3 {
  margin: calc(var(--spacing) * 2) 0;
}

/* ===== TABLAS ===== */
.table-container {
  overflow-x: auto;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

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

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

.table th {
  text-align: left;
  padding: calc(var(--spacing) * 2);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
}

.table td {
  padding: calc(var(--spacing) * 2);
  border-top: 1px solid var(--border);
}

/* ===== BADGES ===== */
.badge {
  display: inline-block;
  padding: calc(var(--spacing) / 2) calc(var(--spacing) * 1.5);
  font-size: 12px;
  font-weight: 600;
  border-radius: 12px;
  background: var(--bg-gray);
  color: var(--text);
}

.badge.success {
  background: #d1fae5;
  color: #065f46;
}

.badge.danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge.warning {
  background: #fef3c7;
  color: #92400e;
}

.badge.muted {
  background: var(--bg-gray);
  color: var(--text-light);
}

.badge-estudiante {
  background: #dbeafe;
  color: #1e40af;
}

.badge-docente {
  background: #d1fae5;
  color: #065f46;
}

.badge-admin {
  background: #fce7f3;
  color: #9f1239;
}

/* ===== API QUOTA ===== */
.api-quota {
  display: inline-block;
  padding: calc(var(--spacing)) calc(var(--spacing) * 2);
  background: #fef3c7;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
}

.api-quota.low {
  background: #fee2e2;
  color: #991b1b;
}

/* ===== CHAT IA ===== */
.ia-chat-container {
  max-width: 900px;
  margin: 0 auto;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: calc(var(--spacing) * 3);
}

.chat-messages {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--spacing) * 3);
  min-height: 500px;
  max-height: 600px;
  overflow-y: auto;
  margin-bottom: calc(var(--spacing) * 3);
}

.message {
  margin-bottom: calc(var(--spacing) * 3);
  padding: calc(var(--spacing) * 2);
  border-radius: var(--radius);
}

.user-message {
  background: var(--bg-gray);
  margin-left: calc(var(--spacing) * 6);
}

.ai-message {
  background: #dbeafe;
  margin-right: calc(var(--spacing) * 6);
}

.ai-message.pending {
  background: #fef3c7;
  border-left: 4px solid var(--warning);
}

.ai-message.approved {
  background: #d1fae5;
  border-left: 4px solid var(--success);
}

.info-message {
  background: #dbeafe;
  text-align: center;
}

.error-message {
  background: #fee2e2;
  color: #991b1b;
  text-align: center;
}

.message-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing);
}

.message-header strong {
  font-size: 14px;
}

.timestamp {
  font-size: 12px;
  color: var(--text-light);
}

.chat-input-form {
  display: flex;
  gap: calc(var(--spacing) * 2);
  align-items: flex-end;
}

.chat-input-form textarea {
  flex: 1;
}

.chat-footer-info {
  text-align: center;
  color: var(--text-light);
  font-size: 13px;
  margin-top: calc(var(--spacing) * 2);
}

/* ===== REVISAR IA ===== */
.interacciones-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing) * 3);
}

.interaccion-card {
  border-left: 4px solid var(--warning);
}

.interaccion-meta {
  display: flex;
  gap: calc(var(--spacing) * 2);
  margin-bottom: calc(var(--spacing) * 2);
  flex-wrap: wrap;
}

.interaccion-content {
  margin-bottom: calc(var(--spacing) * 3);
}

.pregunta-section,
.respuesta-section {
  margin-bottom: calc(var(--spacing) * 3);
}

.pregunta-section h4,
.respuesta-section h4 {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: var(--spacing);
}

.ia-response {
  background: var(--bg-gray);
  padding: calc(var(--spacing) * 2);
  border-radius: var(--radius);
  border-left: 3px solid var(--primary);
}

.revision-form {
  border-top: 1px solid var(--border);
  padding-top: calc(var(--spacing) * 3);
}

.revision-actions {
  display: flex;
  gap: calc(var(--spacing) * 2);
}

/* ===== ACCIONES RÁPIDAS ===== */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing) * 3);
}

.quick-action-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(var(--spacing) * 3);
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
}

.quick-action-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  text-decoration: none;
}

.quick-action-card .icon {
  font-size: 48px;
  margin-bottom: calc(var(--spacing) * 2);
}

.quick-action-card h4 {
  margin-bottom: var(--spacing);
  color: var(--text);
}

.quick-action-card p {
  color: var(--text-light);
  font-size: 14px;
  margin: 0;
}

.quick-action-card.info {
  background: #dbeafe;
  border-color: var(--info);
}

/* ===== GRÁFICO ASCII ===== */
.ascii-chart {
  font-family: monospace;
  font-size: 13px;
}

.chart-bar {
  display: flex;
  align-items: center;
  margin-bottom: calc(var(--spacing));
  gap: calc(var(--spacing) * 2);
}

.chart-label {
  width: 50px;
  color: var(--text-light);
}

.chart-fill {
  height: 20px;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.3s;
}

.chart-value {
  color: var(--text);
  font-weight: 600;
}

/* ===== LISTAS ===== */
.optimization-list {
  list-style: none;
}

.optimization-list li {
  padding: calc(var(--spacing)) 0;
  border-bottom: 1px solid var(--border);
}

.optimization-list li:last-child {
  border-bottom: none;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: calc(var(--spacing) * 2);
  margin-top: calc(var(--spacing) * 2);
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing) / 2);
}

.info-item strong {
  font-size: 13px;
  color: var(--text-light);
}

.info-item span {
  font-size: 15px;
  color: var(--text);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: calc(var(--spacing) * 2);
  }
  
  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .user-menu {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: calc(var(--spacing) * 2);
  }
  
  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: calc(var(--spacing) * 2);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .chat-input-form {
    flex-direction: column;
  }
  
  .revision-actions {
    flex-direction: column;
  }
  
  .message {
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
}

/* ===== UTILIDADES ===== */
.info-badge {
  display: inline-block;
  padding: calc(var(--spacing)) calc(var(--spacing) * 2);
  background: #dbeafe;
  border-radius: var(--radius);
  font-size: 13px;
  margin: calc(var(--spacing) * 2) 0;
}

.ia-promo {
  text-align: center;
}

.ia-promo p {
  margin-bottom: calc(var(--spacing) * 2);
}