:root {
  --md-primary: #1a237e;
  --md-primary-light: #534bae;
  --md-primary-dark: #000051;
  --md-secondary: #ff6f00;
  --md-secondary-light: #ffa040;
  --md-secondary-dark: #c43e00;
  --md-bg: #f5f5f5;
  --md-surface: #ffffff;
  --md-text: #212121;
  --md-text-secondary: #757575;
  --md-border: #e0e0e0;
  --md-success: #2e7d32;
  --md-warning: #f57f17;
  --md-error: #c62828;
  --md-info: #1565c0;
  --md-shadow: 0 2px 4px rgba(0,0,0,0.1), 0 3px 10px rgba(0,0,0,0.08);
  --md-shadow-hover: 0 8px 16px rgba(0,0,0,0.15), 0 6px 20px rgba(0,0,0,0.1);
  --md-radius: 12px;
  --md-radius-sm: 8px;
  --sidebar-width: 260px;
  --sidebar-collapsed: 0px;
  --header-height: 64px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(180deg, var(--md-primary-dark), var(--md-primary));
  color: white;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: 2px 0 12px rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 { font-size: 1.2rem; font-weight: 600; letter-spacing: 0.5px; }
.sidebar-header small { font-size: 0.8rem; opacity: 0.7; display: block; margin-top: 4px; }

.sidebar-nav {
  padding: 12px 0;
  flex: 1;
  overflow-y: auto;
}

.sidebar-nav .nav-section {
  padding: 8px 20px 4px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  opacity: 0.5;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
}

.sidebar-nav a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--md-secondary);
  transform: scaleY(0);
  transition: var(--transition);
}

.sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: white; }
.sidebar-nav a:hover::before { transform: scaleY(1); }
.sidebar-nav a.active { background: rgba(255,255,255,0.12); color: white; }
.sidebar-nav a.active::before { transform: scaleY(1); }

.sidebar-nav .nav-icon { width: 22px; text-align: center; font-size: 1.1rem; }

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-footer .user-info { font-size: 0.85rem; margin-bottom: 8px; }
.sidebar-footer .user-info strong { display: block; }
.sidebar-footer .user-info small { opacity: 0.6; }

/* Main content */
.main-content {
  margin-left: var(--sidebar-width);
  transition: var(--transition);
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--md-surface);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  height: var(--header-height);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--md-text);
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
}

.menu-toggle:hover { background: rgba(0,0,0,0.05); }

.page-content { padding: 24px; max-width: 1200px; margin: 0 auto; }

/* Cards */
.card {
  background: var(--md-surface);
  border-radius: var(--md-radius);
  box-shadow: var(--md-shadow);
  transition: var(--transition);
  overflow: hidden;
}

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

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--md-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.card-header h3 { font-size: 1.1rem; font-weight: 600; }

.card-body { padding: 20px; }

/* Cards de resumo (dashboard) */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card {
  background: var(--md-surface);
  border-radius: var(--md-radius);
  box-shadow: var(--md-shadow);
  padding: 20px;
  transition: var(--transition);
}

.summary-card:hover { box-shadow: var(--md-shadow-hover); transform: translateY(-2px); }

.summary-card .sc-icon { font-size: 2rem; margin-bottom: 8px; }
.summary-card .sc-label { font-size: 0.85rem; color: var(--md-text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.summary-card .sc-value { font-size: 1.8rem; font-weight: 700; margin-top: 4px; }
.summary-card .sc-value.positive { color: var(--md-success); }
.summary-card .sc-value.negative { color: var(--md-error); }
.summary-card .sc-value.neutral { color: var(--md-info); }

/* Forms */
.md-form-group { margin-bottom: 16px; }

.md-form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--md-text-secondary);
}

.md-input {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--md-border);
  border-radius: var(--md-radius-sm);
  font-size: 0.95rem;
  transition: var(--transition);
  background: var(--md-surface);
  color: var(--md-text);
  font-family: inherit;
}

.md-input:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 3px rgba(26,35,126,0.1);
}

.md-input.error { border-color: var(--md-error); }

textarea.md-input { resize: vertical; min-height: 80px; }
select.md-input { cursor: pointer; }
input[type="file"].md-input { padding: 8px; border-style: dashed; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

/* Buttons */
.md-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--md-radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
  font-family: inherit;
}

.md-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 1%, transparent 1%);
  background-position: 50%;
  background-size: 15000%;
  opacity: 0;
  transition: var(--transition);
}

.md-btn:active::after {
  background-size: 100%;
  opacity: 1;
  transition: background 0s;
}

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

.md-btn-secondary { background: var(--md-secondary); color: white; }
.md-btn-secondary:hover { background: var(--md-secondary-light); box-shadow: var(--md-shadow); }

.md-btn-success { background: var(--md-success); color: white; }
.md-btn-success:hover { opacity: 0.9; box-shadow: var(--md-shadow); }

.md-btn-danger { background: var(--md-error); color: white; }
.md-btn-danger:hover { opacity: 0.9; box-shadow: var(--md-shadow); }

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

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

.md-btn-sm { padding: 6px 16px; font-size: 0.8rem; }
.md-btn-block { width: 100%; justify-content: center; }

/* Tables */
.md-table-container {
  overflow-x: auto;
  border-radius: var(--md-radius-sm);
}

.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.md-table th {
  background: var(--md-primary);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.md-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--md-border);
  vertical-align: middle;
}

.md-table tr:hover td { background: rgba(26,35,126,0.03); }
.md-table tr:last-child td { border-bottom: none; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-success { background: #e8f5e9; color: var(--md-success); }
.badge-warning { background: #fff3e0; color: var(--md-warning); }
.badge-danger { background: #ffebee; color: var(--md-error); }
.badge-info { background: #e3f2fd; color: var(--md-info); }
.badge-default { background: #f5f5f5; color: var(--md-text-secondary); }

/* Alerts / Messages */
.alert {
  padding: 14px 20px;
  border-radius: var(--md-radius-sm);
  margin-bottom: 16px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.alert-success { background: #e8f5e9; color: var(--md-success); border-left: 4px solid var(--md-success); }
.alert-error { background: #ffebee; color: var(--md-error); border-left: 4px solid var(--md-error); }
.alert-info { background: #e3f2fd; color: var(--md-info); border-left: 4px solid var(--md-info); }
.alert-warning { background: #fff3e0; color: var(--md-warning); border-left: 4px solid var(--md-warning); }

/* Filters bar */
.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
}

.filters-bar .md-form-group { margin-bottom: 0; min-width: 160px; }
.filters-bar .md-input { padding: 8px 12px; font-size: 0.85rem; }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 20px;
}

.pagination a, .pagination span {
  padding: 8px 14px;
  border-radius: var(--md-radius-sm);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
  color: var(--md-primary);
  background: var(--md-surface);
  border: 1px solid var(--md-border);
}

.pagination a:hover { background: var(--md-primary); color: white; }
.pagination .current { background: var(--md-primary); color: white; border-color: var(--md-primary); }

/* Charts container */
.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

@media (max-width: 900px) {
  .charts-grid { grid-template-columns: 1fr; }
}

.chart-container {
  background: var(--md-surface);
  border-radius: var(--md-radius);
  box-shadow: var(--md-shadow);
  padding: 20px;
}

.chart-container h4 { margin-bottom: 16px; font-size: 0.95rem; color: var(--md-text-secondary); }

.chart-container canvas { max-height: 300px; max-width: 100%; }

/* Quick actions */
.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

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

.login-card {
  background: var(--md-surface);
  border-radius: var(--md-radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  margin: 16px;
}

.login-card h1 {
  text-align: center;
  margin-bottom: 8px;
  font-size: 1.6rem;
  color: var(--md-primary);
}

.login-card p {
  text-align: center;
  color: var(--md-text-secondary);
  margin-bottom: 32px;
  font-size: 0.9rem;
}

.login-card .md-btn { margin-top: 8px; }

.login-card .errorlist { list-style: none; margin-bottom: 12px; }
.login-card .errorlist li {
  background: #ffebee;
  color: var(--md-error);
  padding: 10px 14px;
  border-radius: var(--md-radius-sm);
  font-size: 0.85rem;
}

/* Toggle sidebar overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.active { display: block; }

  .main-content { margin-left: 0; }

  .menu-toggle { display: block; }

  .summary-cards { grid-template-columns: 1fr 1fr; }

  .page-content { padding: 16px; }
}

@media (max-width: 480px) {
  .summary-cards { grid-template-columns: 1fr; }

  .login-card { padding: 24px; }

  .filters-bar { flex-direction: column; }
  .filters-bar .md-form-group { width: 100%; }
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--md-text-secondary);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; opacity: 0.5; }
.empty-state h3 { font-size: 1.2rem; margin-bottom: 8px; color: var(--md-text); }
.empty-state p { font-size: 0.9rem; }