/* 
  EduFlow SaaS Educational ERP - UI Design System Stylesheet
  Design System Tokens & Components
  ---------------------------------------------------------
*/

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300;400;600;700;800&family=Poppins:wght@400;500;600;700;800&display=swap');

:root {
  /* Brand Colors */
  --color-primary: #613DDF;
  --color-primary-rgb: 97, 61, 223;
  --color-primary-hover: #5031c5;
  --color-primary-active: #4026a2;
  
  --color-dark-primary: #241655;
  --color-dark-primary-rgb: 36, 22, 85;
  
  --color-accent: #FFDE59;
  --color-accent-rgb: 255, 222, 89;
  --color-accent-hover: #edd150;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-success-rgb: 16, 185, 129;
  
  --color-warning: #F59E0B;
  --color-warning-rgb: 245, 158, 11;
  
  --color-danger: #EF4444;
  --color-danger-rgb: 239, 68, 68;
  --color-danger-hover: #dc2626;
  
  --color-info: #3B82F6;
  --color-info-rgb: 59, 130, 246;

  /* Typography Scale */
  --font-headings: 'Poppins', sans-serif;
  --font-body: 'Nunito', sans-serif;

  /* Spacing Scale (8px system) */
  --space-1: 4px;   /* 0.25rem */
  --space-2: 8px;   /* 0.5rem */
  --space-3: 12px;  /* 0.75rem */
  --space-4: 16px;  /* 1rem */
  --space-5: 20px;  /* 1.25rem */
  --space-6: 24px;  /* 1.5rem */
  --space-8: 32px;  /* 2rem */
  --space-10: 40px; /* 2.5rem */
  --space-12: 48px; /* 3rem */
  --space-16: 64px; /* 4rem */
  --space-20: 80px; /* 5rem */
  --space-24: 96px; /* 6rem */
  --space-32: 128px;/* 8rem */

  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Mode specific variables */
[data-theme="light"] {
  --color-bg: #F8F9FD;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F3F4FC;
  --color-surface-active: #E8EAF7;
  --color-surface-card: #FFFFFF;
  --color-surface-soft: #DDDDF9;
  --color-surface-soft-rgb: 221, 221, 249;
  
  --color-border: #E2E4F0;
  --color-border-hover: #CED2E6;
  --color-border-focus: #613DDF;
  
  --color-text-primary: #1E2030;
  --color-text-secondary: #5D6385;
  --color-text-tertiary: #8A92B3;
  --color-text-on-primary: #FFFFFF;

  --color-success-bg: #ECFDF5;
  --color-warning-bg: #FFFBEB;
  --color-danger-bg: #FEF2F2;
  --color-info-bg: #EFF6FF;
  
  /* Soft Shadows */
  --shadow-sm: 0 1px 3px rgba(36, 22, 85, 0.04), 0 1px 2px rgba(36, 22, 85, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(36, 22, 85, 0.06), 0 2px 4px -1px rgba(36, 22, 85, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(36, 22, 85, 0.08), 0 4px 6px -2px rgba(36, 22, 85, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(36, 22, 85, 0.1), 0 10px 10px -5px rgba(36, 22, 85, 0.04);
  --shadow-inner: inset 0 2px 4px 0 rgba(36, 22, 85, 0.04);
  
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(226, 228, 240, 0.6);
  --glass-blur: 12px;
  
  /* Scrollbar */
  --scrollbar-track: #F1F3FB;
  --scrollbar-thumb: #C0C5E0;
  --scrollbar-thumb-hover: #A5ADC8;
}

/* Dark Mode specific variables */
[data-theme="dark"] {
  --color-bg: #0C081D;
  --color-surface: #140E2E;
  --color-surface-hover: #1E1744;
  --color-surface-active: #29205B;
  --color-surface-card: #181236;
  --color-surface-soft: #241655;
  --color-surface-soft-rgb: 36, 22, 85;
  
  --color-border: #251D4B;
  --color-border-hover: #362D68;
  --color-border-focus: #8C6DFD;
  
  --color-text-primary: #F0EDF9;
  --color-text-secondary: #A5A8C8;
  --color-text-tertiary: #71759C;
  --color-text-on-primary: #FFFFFF;

  --color-success-bg: rgba(16, 185, 129, 0.15);
  --color-warning-bg: rgba(245, 158, 11, 0.15);
  --color-danger-bg: rgba(239, 68, 68, 0.15);
  --color-info-bg: rgba(59, 130, 246, 0.15);
  
  /* Dark Soft Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.55), 0 4px 6px -2px rgba(0, 0, 0, 0.35);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.65), 0 10px 10px -5px rgba(0, 0, 0, 0.45);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.5);
  
  --glass-bg: rgba(20, 14, 46, 0.75);
  --glass-border: rgba(37, 29, 75, 0.6);
  --glass-blur: 12px;
  
  /* Scrollbar */
  --scrollbar-track: #140E2E;
  --scrollbar-thumb: #251D4B;
  --scrollbar-thumb-hover: #362D68;
}

/* --- Base Resets & Layout --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* App Containers */
.ds-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Navigator */
.ds-sidebar {
  width: 280px;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.ds-sidebar-header {
  padding: var(--space-6) var(--space-8);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.ds-logo-box {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-headings);
  font-size: 1.25rem;
  box-shadow: 0 4px 10px rgba(97, 61, 223, 0.3);
}

.ds-brand-name {
  font-family: var(--font-headings);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.ds-brand-suffix {
  color: var(--color-primary);
}

.ds-sidebar-search {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.ds-search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.ds-search-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.ds-search-field {
  width: 100%;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-8);
  font-size: 0.875rem;
  background-color: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  outline: none;
}

.ds-search-field:focus {
  border-color: var(--color-border-focus);
}

.ds-sidebar-menu {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-3);
}

.ds-menu-group {
  margin-bottom: var(--space-5);
}

.ds-menu-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  padding: 0 var(--space-3) var(--space-2);
}

.ds-menu-list {
  list-style: none;
}

.ds-menu-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.ds-menu-link:hover, .ds-menu-link.active {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
}

.ds-menu-link.active {
  font-weight: 700;
}

/* Header */
.ds-header {
  height: 72px;
  position: fixed;
  top: 0;
  right: 0;
  left: 280px;
  background-color: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
}

.ds-header-title {
  font-size: 1.125rem;
  color: var(--color-text-primary);
}

.ds-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Theme Switcher Button */
.ds-theme-toggle {
  background-color: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.ds-theme-toggle:hover {
  border-color: var(--color-border-hover);
  color: var(--color-primary);
}
.ds-theme-toggle svg {
  width: 20px;
  height: 20px;
}
[data-theme="light"] .sun-icon, 
[data-theme="dark"] .moon-icon {
  display: none;
}

/* Main Content Area */
.ds-main {
  margin-left: 280px;
  margin-top: 72px;
  padding: var(--space-8) 20px;
  flex: 1;
  max-width: 100%;
}

/* Introduction Banner */
.ds-intro {
  background: linear-gradient(135deg, var(--color-dark-primary) 0%, var(--color-primary) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-12);
  color: #FFFFFF;
  margin-bottom: var(--space-12);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.ds-intro::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(255,222,89,0.15) 0%, rgba(255,222,89,0) 70%);
  top: -100px;
  right: -50px;
}

.ds-intro-badge {
  background-color: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
  color: var(--color-accent);
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: inline-flex;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ds-intro h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.ds-intro p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 700px;
  margin-bottom: var(--space-6);
  font-weight: 400;
}

.ds-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-6);
}

.ds-meta-item {
  display: flex;
  flex-direction: column;
}

.ds-meta-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.ds-meta-val {
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: var(--space-1);
}

/* Documentation Sections */
.ds-section {
  margin-bottom: var(--space-16);
  scroll-margin-top: 100px;
}

.ds-section-header {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-6);
}

.ds-section-title {
  font-size: 1.75rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.ds-section-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* Grid & Visual Panels */
.ds-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.ds-panel-title {
  font-size: 1rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  font-weight: 700;
}

/* Swatch Grids */
.ds-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-4);
}

.ds-swatch-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface-card);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.ds-swatch-color {
  height: 100px;
  width: 100%;
}

.ds-swatch-info {
  padding: var(--space-3);
}

.ds-swatch-name {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-text-primary);
}

.ds-swatch-var {
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.ds-swatch-hex {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* Component Sandbox Wrapper */
.ds-sandbox {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-8);
}

.ds-sandbox-preview {
  padding: var(--space-8);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: flex-start;
  justify-content: center;
}

.ds-sandbox-preview.row-layout {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
}

.ds-sandbox-preview.grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  width: 100%;
}

.ds-sandbox-preview.full-layout {
  display: block;
  width: 100%;
}

.ds-sandbox-header {
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ds-sandbox-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-secondary);
}

.ds-sandbox-actions {
  display: flex;
  gap: var(--space-2);
}

.ds-btn-sandbox-toggle {
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.ds-btn-sandbox-toggle:hover, .ds-btn-sandbox-toggle.active {
  color: var(--color-primary);
  background-color: var(--color-surface-hover);
}

.ds-sandbox-code {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.ds-sandbox-code.expanded {
  max-height: 400px;
  overflow-y: auto;
  border-bottom: 1px solid var(--color-border);
}

.ds-code-block-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  position: relative;
}

.ds-code-copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-1.5);
  transition: all var(--transition-fast);
  z-index: 10;
}

.ds-code-copy-btn:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
}

.ds-code-tabs {
  display: flex;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-4);
}

.ds-code-tab {
  padding: var(--space-3) var(--space-4);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ds-code-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.ds-code-pre {
  background-color: var(--color-surface-card);
  padding: var(--space-4) var(--space-6);
  font-family: 'Fira Code', 'Courier New', Courier, monospace;
  font-size: 0.8125rem;
  color: var(--color-text-primary);
  white-space: pre-wrap;
  margin: 0;
  display: none;
}

.ds-code-pre.active {
  display: block;
}

/* Copy notification toast animation */
@keyframes toastIn {
  from { transform: translateY(100px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes toastOut {
  from { transform: translateY(0); opacity: 1; }
  to { transform: translateY(100px); opacity: 0; }
}

/* --- 6. BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.25;
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(97, 61, 223, 0.35);
}

/* Variants */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}
.btn-primary:hover {
  background-color: var(--color-primary-hover);
}
.btn-primary:active {
  background-color: var(--color-primary-active);
}

.btn-secondary {
  background-color: var(--color-surface-soft);
  color: var(--color-dark-primary);
  border-color: rgba(97, 61, 223, 0.1);
}
[data-theme="dark"] .btn-secondary {
  color: var(--color-text-primary);
  background-color: var(--color-surface-hover);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background-color: var(--color-surface-active);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
}

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

/* Sizes */
.btn-sm {
  padding: 6px 12px;
  font-size: 0.75rem;
  border-radius: var(--radius-xs);
}
.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

/* Disabled */
.btn:disabled, .btn.disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* Spinner for Loading State */
.btn-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: btn-spin 0.8s linear infinite;
}
.btn-secondary .btn-spinner {
  border-color: rgba(97, 61, 223, 0.2);
  border-top-color: var(--color-primary);
}
@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* --- 7. FORM ELEMENTS --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  max-width: 320px;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-secondary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-input:hover, .form-select:hover, .form-textarea:hover {
  border-color: var(--color-border-hover);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(97, 61, 223, 0.15);
}

/* Floating Label Inputs */
.form-floating-wrapper {
  position: relative;
  width: 100%;
}
.form-floating-input {
  width: 100%;
  padding: 18px 14px 6px;
  font-size: 0.875rem;
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  outline: none;
}
.form-floating-label {
  position: absolute;
  top: 50%;
  left: 14px;
  transform: translateY(-50%);
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  pointer-events: none;
  transition: all 0.2s ease;
}
.form-floating-input:focus ~ .form-floating-label,
.form-floating-input:not(:placeholder-shown) ~ .form-floating-label {
  top: 10px;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-primary);
}

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

/* Custom Checkbox */
.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-2.5);
  cursor: pointer;
  user-select: none;
}

.checkbox-input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkbox-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  color: white;
  background-color: var(--color-surface-card);
}

.checkbox-box svg {
  width: 12px;
  height: 12px;
  stroke-width: 3px;
  display: none;
}

.checkbox-wrapper:hover .checkbox-box {
  border-color: var(--color-border-hover);
}

.checkbox-input:checked ~ .checkbox-box {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-input:checked ~ .checkbox-box svg {
  display: block;
}

/* Custom Radio */
.radio-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-2.5);
  cursor: pointer;
  user-select: none;
}

.radio-input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.radio-circle {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  background-color: var(--color-surface-card);
}

.radio-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: white;
  transform: scale(0);
  transition: transform var(--transition-fast);
}

.radio-wrapper:hover .radio-circle {
  border-color: var(--color-border-hover);
}

.radio-input:checked ~ .radio-circle {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.radio-input:checked ~ .radio-circle .radio-dot {
  transform: scale(1);
}

/* Custom Switch */
.switch-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.switch-input {
  position: absolute;
  opacity: 0;
  height: 0;
  width: 0;
}

.switch-rail {
  width: 44px;
  height: 24px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  position: relative;
  transition: background-color var(--transition-fast);
}

.switch-knob {
  width: 18px;
  height: 18px;
  background-color: white;
  border-radius: var(--radius-full);
  position: absolute;
  top: 3px;
  left: 3px;
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.switch-input:checked ~ .switch-rail {
  background-color: var(--color-primary);
}

.switch-input:checked ~ .switch-rail .switch-knob {
  transform: translateX(20px);
}

/* Form Validation States */
.form-group.error .form-input {
  border-color: var(--color-danger);
}
.form-group.error .form-input:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}
.form-helper {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
}
.form-group.error .form-helper {
  color: var(--color-danger);
  font-weight: 600;
}

/* --- 8. CARDS --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  width: 100%;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card-interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(97, 61, 223, 0.15);
}

.card-body {
  padding: var(--space-6);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-surface-hover);
  border-top: 1px solid var(--color-border);
}

/* Premium Card Overlays/Profiles */
.profile-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}
.profile-avatar-wrapper {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
}
.profile-avatar {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-primary);
  padding: 2px;
}
.profile-status-dot {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  border: 3px solid var(--color-surface);
  background-color: var(--color-success);
}
.profile-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
}
.profile-role {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-surface-soft);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: var(--space-4);
}
[data-theme="dark"] .profile-role {
  background-color: rgba(97, 61, 223, 0.15);
}
.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-5);
  margin-top: var(--space-5);
}
.profile-stat-val {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-text-primary);
}
.profile-stat-lbl {
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  font-weight: 700;
}

/* Class card specific */
.class-card-subject {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.class-card-meta {
  display: flex;
  gap: var(--space-4);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}
.class-card-teacher {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.class-card-teacher-img {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

/* --- 9. TABLES --- */
.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

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

.table th {
  background-color: var(--color-surface-hover);
  padding: var(--space-4) var(--space-6);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border);
  user-select: none;
}

.table th.sortable {
  cursor: pointer;
}
.table th.sortable:hover {
  color: var(--color-primary);
}

.table td {
  padding: var(--space-4) var(--space-6);
  font-size: 0.875rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
  vertical-align: middle;
}

.table tr:last-child td {
  border-bottom: none;
}

.table tr {
  transition: background-color var(--transition-fast);
}

.table tr:hover {
  background-color: var(--color-surface-hover);
}

.table-student-cell {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.table-student-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.table-student-name {
  font-weight: 700;
  color: var(--color-text-primary);
}

.table-student-email {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

/* Table Pagination controls */
.table-pagination {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.pagination-info {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}
.pagination-btns {
  display: flex;
  gap: var(--space-2);
}

/* --- 10. BADGES --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

/* Semantic Badges */
.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}
.badge-success .badge-dot {
  background-color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}
.badge-warning .badge-dot {
  background-color: var(--color-warning);
}

.badge-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
}
.badge-danger .badge-dot {
  background-color: var(--color-danger);
}

.badge-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
}
.badge-info .badge-dot {
  background-color: var(--color-info);
}

.badge-primary {
  background-color: rgba(97, 61, 223, 0.1);
  color: var(--color-primary);
}
[data-theme="dark"] .badge-primary {
  background-color: rgba(97, 61, 223, 0.25);
  color: #8C6DFD;
}
.badge-primary .badge-dot {
  background-color: var(--color-primary);
}

/* --- 11. ALERTS --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3.5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  width: 100%;
}

.alert-icon {
  margin-top: 2px;
  flex-shrink: 0;
}

.alert-content {
  flex-grow: 1;
}

.alert-title {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.alert-desc {
  font-size: 0.8125rem;
  line-height: 1.4;
}

.alert-close {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
  margin-top: 2px;
}
.alert-close:hover {
  opacity: 1;
}

/* Semantic Alerts */
.alert-success {
  background-color: var(--color-success-bg);
  border-color: rgba(16, 185, 129, 0.2);
  color: #065F46;
}
[data-theme="dark"] .alert-success {
  color: #A7F3D0;
}
.alert-success .alert-title {
  color: #047857;
}
[data-theme="dark"] .alert-success .alert-title {
  color: #34D399;
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: rgba(245, 158, 11, 0.2);
  color: #92400E;
}
[data-theme="dark"] .alert-warning {
  color: #FDE68A;
}
.alert-warning .alert-title {
  color: #B45309;
}
[data-theme="dark"] .alert-warning .alert-title {
  color: #FBBF24;
}

.alert-danger {
  background-color: var(--color-danger-bg);
  border-color: rgba(239, 68, 68, 0.2);
  color: #991B1B;
}
[data-theme="dark"] .alert-danger {
  color: #FEE2E2;
}
.alert-danger .alert-title {
  color: #B91C1C;
}
[data-theme="dark"] .alert-danger .alert-title {
  color: #F87171;
}

.alert-info {
  background-color: var(--color-info-bg);
  border-color: rgba(59, 130, 246, 0.2);
  color: #1E40AF;
}
[data-theme="dark"] .alert-info {
  color: #DBEAFE;
}
.alert-info .alert-title {
  color: #1D4ED8;
}
[data-theme="dark"] .alert-info .alert-title {
  color: #60A5FA;
}

/* --- 12. MODALS --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(12, 8, 29, 0.4);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
  overflow: hidden;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-xs);
  padding: var(--space-1);
}
.modal-close:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-hover);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* --- 13. DRAWERS --- */
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(12, 8, 29, 0.4);
  backdrop-filter: blur(8px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 420px;
  background-color: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  z-index: 1001;
  display: flex;
  flex-direction: column;
}

.drawer-overlay.active + .drawer, 
.drawer.active {
  transform: translateX(0);
}

.drawer-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-title {
  font-size: 1.125rem;
  font-weight: 700;
}

.drawer-close {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-xs);
  padding: var(--space-1);
}
.drawer-close:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
}

.drawer-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.drawer-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-hover);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* --- 14. TABS --- */
.tabs-container {
  width: 100%;
}

.tabs-list {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
  position: relative;
  list-style: none;
}

.tab-btn {
  padding: var(--space-3) var(--space-5);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--color-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- 15. BREADCRUMBS --- */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.breadcrumb-item a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
}

.breadcrumb-item:last-child {
  color: var(--color-text-primary);
  font-weight: 700;
  pointer-events: none;
}

.breadcrumb-separator {
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
}

/* --- 16. EMPTY STATES --- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  max-width: 500px;
  margin: 0 auto;
}

.empty-state-icon-box {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.empty-state-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}

.empty-state-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  max-width: 320px;
}

/* --- 17. LOADING STATES --- */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-surface-soft);
  border-radius: var(--radius-full);
  border-top-color: var(--color-primary);
  animation: spinner-spin 0.8s linear infinite;
}

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

/* Skeleton Loading Wave Shimmer */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-hover) 25%,
    var(--color-surface-active) 50%,
    var(--color-surface-hover) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-xs);
}

.skeleton-text {
  height: 16px;
  width: 100%;
  margin-bottom: var(--space-2);
}

.skeleton-text-sm {
  height: 12px;
  width: 60%;
}

.skeleton-avatar {
  height: 48px;
  width: 48px;
  border-radius: var(--radius-full);
}

.skeleton-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  width: 100%;
  max-width: 320px;
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- 18. NOTIFICATION TOAST STYLES --- */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: 2000;
  max-width: 360px;
  width: 100%;
}

.toast {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-lg);
  display: flex;
  gap: var(--space-3.5);
  align-items: flex-start;
  animation: toastIn 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast.removing {
  animation: toastOut 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast-icon {
  margin-top: 2px;
  flex-shrink: 0;
}

.toast-body {
  flex-grow: 1;
}

.toast-title {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.toast-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: color var(--transition-fast);
}
.toast-close:hover {
  color: var(--color-text-primary);
}

/* Toast Semantic Highlights */
.toast-success .toast-icon { color: var(--color-success); }
.toast-danger .toast-icon { color: var(--color-danger); }
.toast-warning .toast-icon { color: var(--color-warning); }
.toast-info .toast-icon { color: var(--color-info); }

/* --- 19. KPI CARDS --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
  width: 100%;
}

.kpi-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.kpi-info {
  display: flex;
  flex-direction: column;
}

.kpi-label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.kpi-value {
  font-size: 1.875rem;
  font-weight: 800;
  margin: var(--space-1) 0;
  color: var(--color-text-primary);
  line-height: 1.1;
}

.kpi-trend {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.75rem;
  font-weight: 700;
}

.kpi-trend.up {
  color: var(--color-success);
}
.kpi-trend.down {
  color: var(--color-danger);
}

.kpi-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kpi-card.accent-indicator::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--color-primary);
}

/* --- 20. CHART STYLES (PURE CSS & SVG BAR & PROGRESS) --- */
.chart-card {
  padding: var(--space-6);
}

.chart-bar-container {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  height: 200px;
  padding-top: var(--space-6);
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-3);
  position: relative;
}

.chart-bar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.chart-bar {
  width: 28px;
  border-top-left-radius: var(--radius-xs);
  border-top-right-radius: var(--radius-xs);
  background: linear-gradient(180deg, var(--color-primary) 0%, rgba(97, 61, 223, 0.4) 100%);
  position: relative;
  cursor: pointer;
  transition: height 1s cubic-bezier(0.16, 1, 0.3, 1), background var(--transition-fast);
}

.chart-bar:hover {
  background: linear-gradient(180deg, var(--color-primary-hover) 0%, rgba(97, 61, 223, 0.6) 100%);
}

.chart-bar-tooltip {
  position: absolute;
  top: -36px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background-color: var(--color-dark-primary);
  color: white;
  padding: var(--space-1) var(--space-2);
  font-size: 0.6875rem;
  font-weight: 700;
  border-radius: var(--radius-xs);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

.chart-bar:hover .chart-bar-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.chart-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 700;
  margin-top: var(--space-3);
}

/* Circular/Ring Chart */
.chart-ring-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.chart-ring-svg {
  transform: rotate(-90deg);
}

.chart-ring-track {
  fill: none;
  stroke: var(--color-surface-hover);
  stroke-width: 12;
}

.chart-ring-fill {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-dasharray: 251.2;
  stroke-dashoffset: 62.8; /* 75% complete */
  transition: stroke-dashoffset 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.chart-ring-legend {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.legend-color {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
}

/* Sparkline for KPI Card */
.sparkline {
  width: 60px;
  height: 30px;
  fill: none;
  stroke: var(--color-success);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* RESPONSIVE LAYOUT adjustments */
@media (max-width: 1024px) {
  .ds-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
  }
  .ds-sidebar.active {
    transform: translateX(0);
  }
  .ds-header {
    left: 0;
  }
  .ds-main {
    margin-left: 0;
  }
  
  .ds-hamburger {
    display: flex !important;
  }
}

.ds-hamburger {
  display: none;
  background-color: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.ds-hamburger svg {
  width: 20px;
  height: 20px;
}