/* Estilo Principal do AgenteAula — Aula Prof. Juliano */
@font-face {
  font-family: 'Instrument Sans';
  src: url('/fonts/instrument-sans.woff2') format('woff2');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg-app: #F5F7FB;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFC;
  --text-main: #172033;
  --text-muted: #596579;
  --text-light: #8C9BAE;
  --border: #DEE4EE;
  --border-focus: #4F46E5;
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  --success: #0F766E;
  --success-light: #F0FDF4;
  --warning: #92400E;
  --warning-light: #FEF3C7;
  --danger: #B91C1C;
  --danger-light: #FEF2F2;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --trans: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Instrument Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}

.brand-info h1 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}

.brand-info span {
  font-size: 12px;
  color: var(--text-muted);
}

.user-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.turma-tag {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}

/* Layout Principal */
.app-container {
  display: flex;
  min-height: calc(100vh - 64px);
}

.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--trans);
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: var(--bg-app);
  color: var(--text-main);
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.main-content {
  flex: 1;
  padding: 32px 40px;
  max-width: 1400px;
}

/* Status Banner */
.status-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-badge.rascunho { background: #F1F5F9; color: #475569; }
.status-badge.em_avaliacao { background: var(--warning-light); color: var(--warning); }
.status-badge.ajustes_solicitados { background: #FEF3C7; color: #B45309; }
.status-badge.aprovado { background: var(--success-light); color: var(--success); }
.status-badge.reprovado { background: var(--danger-light); color: var(--danger); }

/* Estúdio Layout (2/3 + 1/3) */
.studio-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 28px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--text-main);
  background: #fff;
  transition: border-color var(--trans), box-shadow var(--trans);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

textarea.form-control {
  resize: vertical;
}

.editor-prompt {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.6;
  min-height: 240px;
}

.counter {
  display: flex;
  justify-content: flex-end;
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--trans);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: #fff;
  border-color: var(--border);
  color: var(--text-main);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: #CBD5E1;
}

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

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

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* Chat de Teste */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 600px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.chat-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: #F8FAFC;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.msg-bubble {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 15px;
  line-height: 1.5;
  word-break: break-word;
}

.msg-bubble.user {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-bubble.assistant {
  align-self: flex-start;
  background: #F1F5F9;
  color: var(--text-main);
  border-bottom-left-radius: 4px;
}

.chat-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  background: #fff;
  display: flex;
  gap: 10px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-content {
  background: #fff;
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

/* Responsividade */
@media (max-width: 1024px) {
  .studio-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 10px;
  }
  .main-content {
    padding: 20px 16px;
  }
}