/* Small component styles (load early to avoid FOUC) */
@import url("/pages/style/cms-component/forms.css");
@import url("/pages/style/cms-component/tables.css");
@import url("/pages/style/cms-component/notifications.css");
@import url("/pages/style/cms-component/modals.css");
@import url("/pages/style/cms-component/profile.css");
@import url("/pages/style/cms-component/settings.css");
@import url("/pages/style/cms-component/classrooms.css");

/* Base Styles & Variables */
:root {
  /* Light Theme Variables */
  --light-bg: #f5f7fa;
  --light-sidebar-bg: #ffffff;
  --light-header-bg: #ffffff;
  --light-text: #333333;
  --light-secondary-text: #6c757d;
  --light-border: #e9ecef;
  --light-hover: #f1f3f5;
  --light-active: #e2e6ea;
  --light-card-bg: #ffffff;
  --light-input-bg: #ffffff;
  --light-input-border: #ced4da;
  --light-shadow: rgba(0, 0, 0, 0.05);
  
  /* Dark Theme Variables */
  --dark-bg: #1a1d21;
  --dark-sidebar-bg: #232529;
  --dark-header-bg: #2c2f33;
  --dark-text: #f8f9fa;
  --dark-secondary-text: #adb5bd;
  --dark-border: #343a40;
  --dark-hover: #343a40;
  --dark-active: #4e535c;
  --dark-card-bg: #2c2f36;
  --dark-input-bg: #2c2f36;
  --dark-input-border: #40444b;
  --dark-shadow: rgba(0, 0, 0, 0.3);
  
  /* Common Variables */
  --primary: #5865f2;
  --primary-hover: #4752c4;
  --secondary: #6c757d;
  --success: #2ecc71;
  --info: #3498db;
  --warning: #f39c12;
  --danger: #e74c3c;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --border-radius: 8px;
  --transition-speed: 0.2s;
  
  --header-height: 60px;
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 64px;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
}

/* Apply theme */
.light-theme {
  --bg: var(--light-bg);
  --sidebar-bg: var(--light-sidebar-bg);
  --header-bg: var(--light-header-bg);
  --text: var(--light-text);
  --secondary-text: var(--light-secondary-text);
  --border: var(--light-border);
  --hover: var(--light-hover);
  --active: var(--light-active);
  --card-bg: var(--light-card-bg);
  --input-bg: var(--light-input-bg);
  --input-border: var(--light-input-border);
  --shadow: var(--light-shadow);
}

.dark-theme {
  --bg: var(--dark-bg);
  --sidebar-bg: var(--dark-sidebar-bg);
  --header-bg: var(--dark-header-bg);
  --text: var(--dark-text);
  --secondary-text: var(--dark-secondary-text);
  --border: var(--dark-border);
  --hover: var(--dark-hover);
  --active: var(--dark-active);
  --card-bg: var(--dark-card-bg);
  --input-bg: var(--dark-input-bg);
  --input-border: var(--dark-input-border);
  --shadow: var(--dark-shadow);
}

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background-color: var(--bg);
  transition: background-color var(--transition-speed);
}

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

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
}

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex-grow: 1;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-speed);
  background-color: var(--bg);
}

.sidebar.collapsed + .main-content {
  margin-left: var(--sidebar-collapsed-width);
}

.content-area {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  position: relative; /* ensure .content-loader is scoped to content, not full viewport */
}

/* Sidebar collapse/expand (desktop) */
.sidebar {
  width: var(--sidebar-width) !important; /* ensure baseline width */
  transition: width var(--transition-speed) ease !important;
}
.sidebar.collapsed {
  width: var(--sidebar-collapsed-width) !important;
  overflow: hidden !important;
}

/* Adjust main content when collapsed (already handled by sibling selector) */
/* .sidebar.collapsed + .main-content { margin-left handled earlier } */

/* Sidebar dropdown visibility */
.sidebar .dropdown .dropdown-menu {
  display: none;
}
.sidebar .dropdown.open > .dropdown-menu {
  display: block;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background-color var(--transition-speed), transform var(--transition-speed);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--hover);
  color: var(--text);
}

.btn-secondary:hover {
  background-color: var(--active);
  transform: translateY(-1px);
}

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

.btn-danger:hover {
  background-color: #c0392b;
  transform: translateY(-1px);
}

.btn-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--secondary-text);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

.btn-icon:hover {
  background-color: var(--hover);
  color: var(--text);
}

.btn-icon[title="Delete"]:hover,
.btn-icon[title="Remove"]:hover {
  color: var(--danger);
}

/* Loader */
.content-loader {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.dark-theme .content-loader {
  background-color: rgba(26, 29, 33, 0.8);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(88, 101, 242, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spinner 1s linear infinite;
}

@keyframes spinner {
  to {transform: rotate(360deg);}
}

/* Responsive */
@media (max-width: 768px) {
  .main-content {
    margin-left: 0;
  }
  
  .content-area {
    padding: 1.5rem;
  }

  /* Mobile sidebar fallback to work with .active class */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width) !important;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease !important;
    z-index: 1200;
  }
  .sidebar.active {
    transform: translateX(0);
  }
}

/* Component styles are loaded via HTML <link> tags to ensure proper loading order and avoid @import issues */
/* (previous @import lines removed) */