:root {
  /* Core color palette - simplified hierarchy */
  --color-primary: #1e3a73;    /* Deep blue - main brand color */
  --color-secondary: #002338;  /* Dark navy - supporting color */
  --color-tertiary: #ffffff;   /* White - contrast color */
  --color-quaternary: #f8f9fa; /* Light gray - background/accent color */
  
  /* Derived colors - automatically calculated from the core palette */
  --color-primary-light: #2a4d8f;
  --color-primary-dark: #152a57;
  --color-secondary-light: #003652;
  --color-secondary-dark: #001625;
  
  /* Functional colors - based on the hierarchy */
  --text-on-light: var(--color-secondary);
  --text-on-dark: var(--color-tertiary);
  --text-muted: #6c757d;
  --border-color: rgba(0, 0, 0, 0.1);
  
  /* Component styling */
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --hover-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Base styles */
body {
  background-color: var(--color-tertiary);
  margin: 0;
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-on-light);
}

/* Header and Navigation */
.main-header .navbar .nav > li > a,
.main-header .navbar .sidebar-toggle {
  color: var(--text-on-light);
  transition: all var(--transition-fast);
  padding: 15px 18px;
  font-weight: 500;
}

.main-header .navbar .nav > li > a:hover,
.main-header .navbar .nav > li > a:focus,
.main-header .navbar .sidebar-toggle:hover {
  color: var(--text-on-dark) !important;
  background-color: var(--color-secondary) !important;
  transform: translateY(-2px);
}

/* Sidebar styling */
.sidebar a {
  color: var(--text-on-dark) !important;
  padding: 12px 15px;
  border-radius: var(--border-radius-sm);
  margin: 2px 10px;
  transition: all var(--transition-normal);
}

aside.main-sidebar {
  background-color: var(--color-primary) !important;
  box-shadow: var(--box-shadow);
}

.sidebar-menu > li.menu-open > a {
  background-color: rgba(255, 255, 255, 0.1) !important;
  border-left: 3px solid var(--color-tertiary);
}

.sidebar-menu > li:hover > a {
  background-color: var(--color-secondary) !important;
  transform: translateX(5px);
}

.sidebar-menu > li > .treeview-menu {
  background-color: var(--color-tertiary) !important;
  margin: 0 10px;
  border-radius: var(--border-radius-sm);
}

.sidebar-menu .treeview-menu > li > a {
  color: var(--color-primary) !important;
  padding: 10px 15px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.sidebar-menu .treeview-menu > li > a:hover {
  color: var(--color-secondary) !important;
  background-color: var(--color-quaternary);
  padding-left: 20px;
}

/* Navbar styling */
.navbar.navbar-static-top.navbar-portal {
  border-bottom: 2px solid var(--color-secondary) !important;
  background-color: var(--color-primary) !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Alert styling */
.aviso {
  font-size: 16px;
  font-weight: 600;
  background-color: #dc3545;
  border-left: 4px solid #a71d2a;
  padding: 12px 20px;
  margin-bottom: 20px;
  color: var(--color-tertiary);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--box-shadow);
}

/* Menu title styling */
.menutitulo {
  font-family: 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin: 20px 15px 10px;
  padding: 8px 0;
  color: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border-color);
}

/* Logo and branding */
.topo-logo {
  background: var(--color-tertiary);
  padding: 10px 0;
}

.logo-portal, .navbar-portal {
  background-color: var(--color-tertiary) !important;
  transition: all var(--transition-normal);
}

.logo-portal img {
  max-height: 50px;
  max-width: 160px;
  transition: transform var(--transition-normal);
}

.logo-portal img:hover {
  transform: scale(1.05);
}

.user-header-portal {
  background-color: var(--color-primary) !important;
  background-image: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.sidebar-toggle-portal:hover {
  background-color: rgba(0, 0, 0, 0.2) !important;
  border-radius: var(--border-radius-sm);
}

/* Login styling */
.login_logo {
  max-height: 120px;
  width: auto;
  margin-bottom: 20px;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.login-box-body {
  background-color: var(--color-tertiary);
  border-radius: var(--border-radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  padding: 30px;
  border-top: 4px solid var(--color-primary);
}

.login-box-body .btn-primary {
  background-color: var(--color-secondary) !important;
  border-color: transparent !important;
  border-radius: var(--border-radius-sm);
  padding: 10px 16px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all var(--transition-fast);
}

.login-box-body .btn-primary:hover {
  background-color: var(--color-primary) !important;
  transform: translateY(-2px);
  box-shadow: var(--hover-shadow);
}

.login-box-body .login-box-msg {
  color: var(--text-on-light);
  font-size: 16px;
  margin-bottom: 20px;
}

.login-box small {
  color: var(--text-muted);
}

/* Events module styling */
.topo-eventos {
  background: var(--color-quaternary);
  border-radius: var(--border-radius-sm);
  padding: 15px;
  margin-bottom: 20px;
}

.btn-primary-eventos {
  background-color: var(--color-secondary) !important;
  color: var(--text-on-dark) !important;
  border: none !important;
  border-radius: var(--border-radius-sm) !important;
  padding: 10px 20px;
  font-weight: 600;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast) !important;
}

.btn-primary-eventos:hover {
  background-color: var(--color-primary) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.2);
}

.btn-primary-eventos:active {
  transform: translateY(0);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
}

.bt-evento, 
.btn-evento,
.btn-cliente {
  background-color: var(--color-primary) !important;
  border: none !important;
  border-radius: var(--border-radius-sm) !important;
  padding: 10px 20px;
  font-weight: 500;
  color: var(--text-on-dark) !important;
  transition: all var(--transition-fast);
}

.bt-evento:hover, 
.btn-evento:hover,
.btn-cliente:hover {
  background-color: var(--color-secondary) !important;
  transform: translateY(-2px);
  box-shadow: var(--hover-shadow);
}

.box-evento {
  border: none !important;
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.box-evento:hover {
  box-shadow: var(--hover-shadow);
  transform: translateY(-5px);
}

.box-evento-form {
  border: none !important;
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow);
  padding: 20px;
  background-color: var(--color-quaternary);
  position: relative;
}

.box-evento-form:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.container-geral-eventos h3 {
  color: var(--text-on-light);
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.container-geral-eventos h3:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--color-primary);
}

.container-eventos-acesso {
  max-width: 500px;
  margin: 5% auto;
  background-color: var(--color-tertiary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--box-shadow);
  padding: 30px;
}

/* Utility classes */
.grid-bt-detalhes li {
  margin-bottom: 8px;
  padding: 5px 0;
}

code {
  padding: 0 !important;
  background-color: var(--color-quaternary);
  border-radius: var(--border-radius-sm);
}

.texto_confirmacao {
  color: var(--color-primary-dark) !important;
  font-weight: 500;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .container-eventos-acesso {
    margin: 10% 15px;
  }
  
  .login-box-body {
    padding: 20px;
  }
  
  .logo-portal img {
    max-height: 40px;
  }
}