/* =================================================================
   GOOGLE FONTS - MANROPE
   ================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

/* =================================================================
   CSS VARIABLES & THEME SYSTEM
   ================================================================= */

:root {
  /* Colors - Light Theme (Modern & Vibrant) */
  --color-primary: #4A69FF;
  --color-primary-hover: #3451E8;
  --color-primary-light: rgba(74, 105, 255, 0.1);

  --color-secondary: #6B7FFF;
  --color-accent: #8B9EFF;

  --color-success: #1DD1A1;
  --color-success-hover: #10B981;
  --color-success-light: rgba(29, 209, 161, 0.1);

  --color-warning: #FFA502;
  --color-warning-light: rgba(255, 165, 2, 0.1);

  --color-error: #EE5A6F;
  --color-error-hover: #E63946;
  --color-error-light: rgba(238, 90, 111, 0.1);

  --color-info: #4A69FF;
  --color-info-light: rgba(74, 105, 255, 0.1);

  --color-bg: #FAFBFC;
  --color-bg-secondary: #FFFFFF;
  --color-bg-tertiary: #F5F7FA;
  --color-bg-card: rgba(255, 255, 255, 0.95);
  --color-sidebar: #FFFFFF;

  --color-text: #1A202C;
  --color-text-secondary: #4A5568;
  --color-text-tertiary: #718096;

  --color-border: #E2E8F0;
  --color-border-light: #EDF2F7;

  /* Spacing - 8px Grid System */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 1rem;       /* 16px */
  --spacing-lg: 1.5rem;     /* 24px */
  --spacing-xl: 2rem;       /* 32px */
  --spacing-2xl: 3rem;      /* 48px */
  --spacing-3xl: 4rem;      /* 64px */

  /* Border radius - Modern smooth curves */
  --radius-sm: 0.375rem;    /* 6px */
  --radius-md: 0.5rem;      /* 8px */
  --radius-lg: 0.75rem;     /* 12px */
  --radius-xl: 1rem;        /* 16px */
  --radius-2xl: 1.5rem;     /* 24px */

  /* Shadows - 4-Tier Professional System */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.16), 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.20), 0 8px 24px rgba(0, 0, 0, 0.16);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-blur: 12px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --sidebar-width: 220px;
  --sidebar-collapsed-width: 70px;
  --header-height: 72px;

  /* Typography Scale */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 2rem;       /* 32px */
  --font-size-4xl: 2.5rem;     /* 40px */
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;
  --color-bg-card: rgba(30, 41, 59, 0.95);
  --color-sidebar: #1E293B;

  --color-text: #F1F5F9;
  --color-text-secondary: #4A5568;
  --color-text-tertiary: #94A3B8;

  --color-border: #334155;
  --color-border-light: #475569;

  /* Adjusted shadows for dark theme */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4), 0 1px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6), 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.7), 0 8px 24px rgba(0, 0, 0, 0.6);

  /* Dark glassmorphism */
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 16px;
}

/* Material Symbols Configuration */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  font-size: 24px;
  user-select: none;
}

/* =================================================================
   RESET & BASE STYLES
   ================================================================= */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

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

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

/* Focus styles for accessibility */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* =================================================================
   LAYOUT
   ================================================================= */

#app {
  display: flex;
  min-height: 100vh;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-base);
}

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

.main.no-sidebar {
  margin-left: 0;
}

/* =================================================================
   SIDEBAR
   ================================================================= */

.sidebar {
  position: fixed;
  left: 0;
  top: var(--header-height);
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-sidebar, var(--color-bg-secondary));
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), width var(--transition-base);
  z-index: 1000;
  box-shadow: var(--shadow-subtle);
}

.sidebar-hidden {
  transform: translateX(-100%);
}

/* When sidebar is hidden, main should not have left margin */
.sidebar.sidebar-hidden ~ .main {
  margin-left: 0;
}

.sidebar-collapsed {
  width: var(--sidebar-collapsed-width);
}

/* When sidebar is collapsed, center icons and hide text */
.sidebar.sidebar-collapsed .nav-link {
  justify-content: center;
  padding: var(--spacing-md);
  gap: 0;
}

.sidebar.sidebar-collapsed .nav-link .nav-link-label {
  opacity: 0;
  width: 0;
  overflow: hidden;
  position: absolute;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
  overflow-x: hidden;
}

/* Custom scrollbar for sidebar */
.sidebar-nav::-webkit-scrollbar {
  width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.938rem;
  line-height: 1.2;
  position: relative;
  background: transparent;
  border: none;
  text-align: left;
  appearance: none;
}

.nav-link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(74, 105, 255, 0.2);
}

.nav-link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: currentColor;
  transition: color var(--transition-base);
}

.nav-link-icon svg,
.nav-link-icon .material-symbols-outlined {
  width: 20px;
  height: 20px;
  display: block;
  font-size: 20px;
}

.nav-link-label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-link:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
}

.nav-link.active {
  background-color: rgba(74, 105, 255, 0.15);
  color: var(--color-primary);
  font-weight: 600;
}

[data-theme="dark"] .nav-link.active {
  background-color: rgba(74, 105, 255, 0.25);
}

/* =================================================================
   HEADER
   ================================================================= */

.header {
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-xl);
  transition: all var(--transition-base);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  box-shadow: var(--shadow-subtle);
}

.header-hidden {
  display: none;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

#page-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

/* Sidebar toggle - visible on desktop */
#sidebar-toggle {
  display: flex;
}

/* Mobile menu toggle - hidden on desktop, visible on mobile */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  cursor: pointer;
  color: var(--color-text);
  padding: 0;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  width: 44px;
  height: 44px;
}

/* Mobile: hide sidebar toggle, show mobile menu toggle */
@media (max-width: 768px) {
  #sidebar-toggle {
    display: none !important;
  }

  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

.mobile-menu-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.mobile-menu-toggle:hover {
  background-color: var(--color-bg-tertiary);
  transform: scale(1.05);
}

.mobile-menu-toggle:active {
  transform: scale(0.95);
}

/* =================================================================
   CONTENT
   ================================================================= */

.content {
  flex: 1;
  padding: var(--spacing-xl);
  padding-top: calc(var(--header-height) + var(--spacing-xl));
  transition: opacity var(--transition-base);
  opacity: 1;
}

/* When header is hidden, remove top padding */
.header-hidden ~ .content {
  padding-top: var(--spacing-xl);
}

/* =================================================================
   BUTTONS
   ================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.02em;
  font-family: 'Manrope', sans-serif;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-border);
  border-color: var(--color-text-tertiary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-error) 0%, var(--color-error-hover) 100%);
  color: white;
  box-shadow: var(--shadow-sm);
}

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

.btn-success {
  background: linear-gradient(135deg, var(--color-success) 0%, var(--color-success-hover) 100%);
  color: white;
  box-shadow: var(--shadow-sm);
}

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

.btn-warning {
  background-color: var(--color-warning);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-warning:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  filter: brightness(1.1);
}

/* Button sizes */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--font-size-base);
}

/* Icon buttons */
.btn-icon {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
}

.btn-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.btn-icon:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  transform: scale(1.05);
}

.btn-icon:active {
  transform: scale(0.95);
}

/* User avatar button */
.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  font-weight: 700;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.user-avatar:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* User menu dropdown */
.user-menu {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  visibility: hidden;
  transform: translateY(-10px) scale(0.95);
  transition: all var(--transition-base);
  z-index: 1002;
  padding: 0;
  overflow: hidden;
}

.dropdown-menu:not(.hidden) {
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* Dropdown header (user info) */
.dropdown-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.dropdown-header .user-name {
  display: block;
  color: var(--color-text);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-xs);
}

.dropdown-header .user-role {
  display: block;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Theme selector in dropdown */
.theme-selector-dropdown {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

.btn-icon-sm {
  padding: var(--spacing-xs);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  -webkit-text-fill-color: var(--color-text-secondary);
}

.btn-icon-sm svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.btn-icon-sm .material-symbols-outlined {
  font-size: 18px;
}

.btn-icon-sm:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.theme-btn {
  position: relative;
  transition: all var(--transition-base);
  color: var(--color-text-secondary);
}

.theme-btn svg,
.theme-btn .material-symbols-outlined {
  width: 20px;
  height: 20px;
  font-size: 20px;
  display: block;
  stroke: currentColor;
}

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

.theme-btn.active svg,
.theme-btn.active .material-symbols-outlined {
  stroke: currentColor;
  color: white;
}

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

/* Dropdown item (logout button) */
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border: none;
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.dropdown-item:hover {
  background-color: var(--color-bg-tertiary);
}

.dropdown-item svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  flex-shrink: 0;
}

/* =================================================================
   FORMS
   ================================================================= */

.form-group {
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  letter-spacing: 0.01em;
  transition: all var(--transition-base);
}

.form-input,
.form-select,
.form-textarea,
.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: var(--font-size-base);
  font-family: 'Manrope', sans-serif;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-subtle);
}

.form-input::placeholder,
.form-textarea::placeholder,
.form-control::placeholder {
  color: var(--color-text-tertiary);
  opacity: 1;
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus,
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-bg);
  box-shadow: 0 0 0 4px var(--color-primary-light), var(--shadow-sm);
  transform: translateY(-2px);
}

.form-input.invalid {
  border-color: var(--color-error);
  background-color: var(--color-error-light);
}

.form-input.invalid:focus {
  box-shadow: 0 0 0 4px var(--color-error-light), var(--shadow-sm);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-xs);
  font-weight: 500;
  margin-top: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.form-error::before {
  content: 'âš ';
  font-size: var(--font-size-sm);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Floating label variant */
.form-group-floating {
  position: relative;
  margin-bottom: var(--spacing-xl);
}

.form-group-floating .form-label {
  position: absolute;
  left: 1rem;
  top: 0.875rem;
  pointer-events: none;
  transition: all var(--transition-base);
  background-color: transparent;
  padding: 0 0.25rem;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

.form-group-floating .form-input:focus ~ .form-label,
.form-group-floating .form-input:not(:placeholder-shown) ~ .form-label {
  top: -0.5rem;
  left: 0.75rem;
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  background-color: var(--color-bg);
  font-weight: 600;
}

/* Checkbox and Radio styles */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* =================================================================
   CARDS
   ================================================================= */

.card {
  background: var(--color-bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-accent) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
  font-weight: 500;
}

.card-body {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.card-footer {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
}

/* Card variations */
.card-primary {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(74, 105, 255, 0.05) 0%, rgba(107, 127, 255, 0.05) 100%);
}

.card-success {
  border-color: var(--color-success);
  background: linear-gradient(135deg, rgba(29, 209, 161, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.card-error {
  border-color: var(--color-error);
  background: linear-gradient(135deg, rgba(238, 90, 111, 0.05) 0%, rgba(230, 57, 70, 0.05) 100%);
}

/* =================================================================
   TOASTS
   ================================================================= */

.toast-container {
  position: fixed;
  top: calc(var(--header-height) + var(--spacing-lg));
  right: var(--spacing-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  pointer-events: none;
}

.toast {
  min-width: 320px;
  max-width: 480px;
  padding: var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  opacity: 0;
  transform: translateX(120%) scale(0.9);
  transition: all var(--transition-slow);
  pointer-events: auto;
  position: relative;
  overflow: hidden;
}

.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

.toast-show {
  opacity: 1;
  transform: translateX(0) scale(1);
}

.toast-hide {
  opacity: 0;
  transform: translateX(120%) scale(0.9);
}

.toast-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: 1;
}

.toast-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.5;
}

.toast-success::before {
  background: var(--color-success);
}

.toast-success .toast-icon {
  background: var(--color-success-light);
  color: var(--color-success);
}

.toast-error::before {
  background: var(--color-error);
}

.toast-error .toast-icon {
  background: var(--color-error-light);
  color: var(--color-error);
}

.toast-warning::before {
  background: var(--color-warning);
}

.toast-warning .toast-icon {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

.toast-info::before {
  background: var(--color-info);
}

.toast-info .toast-icon {
  background: var(--color-info-light);
  color: var(--color-info);
}

.toast-close {
  background: var(--color-bg-tertiary);
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: var(--font-size-lg);
  cursor: pointer;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.toast-close:hover {
  background: var(--color-border);
  color: var(--color-text);
  transform: scale(1.1);
}

.toast-close:active {
  transform: scale(0.95);
}

/* =================================================================
   MODALS
   ================================================================= */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

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

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-slow);
}

.modal-show .modal-content {
  transform: scale(1) translateY(0);
}

.confirm-modal-content {
  padding: var(--spacing-2xl);
}

.confirm-header {
  margin-bottom: var(--spacing-lg);
}

.confirm-header h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
}

.confirm-body {
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

.confirm-footer {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

/* Modal animations */
@keyframes modalSlideIn {
  from {
    transform: scale(0.9) translateY(20px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.modal-show .modal-content {
  animation: modalSlideIn var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

/* =================================================================
   RESPONSIVE
   ================================================================= */

@media (max-width: 768px) {
  .main {
    margin-left: 0 !important;
  }

  .sidebar {
    top: 0;
    transform: translateX(-100%);
  }

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

  .mobile-menu-toggle {
    display: block;
  }

  .mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

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

  .content {
    padding: var(--spacing-md);
  }

  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
  }

  .toast {
    min-width: 0;
    max-width: none;
  }
}

/* =================================================================
   LOGIN PAGE
   ================================================================= */

.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #4A69FF 0%, #6B7FFF 50%, #8B9EFF 100%);
}

/* Animated background elements */
.login-container::before,
.login-container::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  animation: float 20s infinite ease-in-out;
}

.login-container::before {
  width: 600px;
  height: 600px;
  background: white;
  top: -200px;
  left: -200px;
  animation-delay: 0s;
}

.login-container::after {
  width: 400px;
  height: 400px;
  background: white;
  bottom: -100px;
  right: -100px;
  animation-delay: 5s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(50px, -50px) scale(1.1);
  }
  66% {
    transform: translate(-50px, 50px) scale(0.9);
  }
}

.login-box {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  padding: var(--spacing-3xl);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 440px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  z-index: 1;
  animation: slideUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--color-text);
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  position: relative;
}

.login-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  margin: var(--spacing-md) auto 0;
  border-radius: 2px;
}

.login-box .btn-primary {
  margin-top: var(--spacing-md);
}

/* Login form specific styling */
#login-form .form-group:last-of-type {
  margin-bottom: var(--spacing-lg);
}

/* =================================================================
   UTILITIES
   ================================================================= */

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* Spacing utilities */
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }

.ml-1 { margin-left: var(--spacing-md); }
.mr-1 { margin-right: var(--spacing-md); }

.p-1 { padding: var(--spacing-md); }
.p-2 { padding: var(--spacing-lg); }
.p-3 { padding: var(--spacing-xl); }

/* Display utilities */
.hidden { display: none; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flex utilities */
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--spacing-md); }
.gap-2 { gap: var(--spacing-lg); }

/* Loading spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-lg {
  width: 60px;
  height: 60px;
  border-width: 6px;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-error {
  background: var(--color-error-light);
  color: var(--color-error);
}

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

/* Divider */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-lg) 0;
}

/* Skeleton loader */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-border) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

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

.skeleton-text {
  height: 1rem;
  margin-bottom: var(--spacing-sm);
}

.skeleton-title {
  height: 1.5rem;
  margin-bottom: var(--spacing-md);
  width: 60%;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

/* Fade in animation */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

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

/* Pulse animation */
.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* =================================================================
   DATA MANAGEMENT
   ================================================================= */

.data-management-container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-header {
  margin-bottom: var(--spacing-2xl);
}

.page-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-sm);
}

.entities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.checkbox-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  background-color: var(--color-bg-secondary);
}

.checkbox-card:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg-tertiary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.checkbox-card input[type="checkbox"] {
  display: none;
}

.checkbox-card input[type="checkbox"]:checked + .checkbox-content {
  color: var(--color-primary);
}

.checkbox-card input[type="checkbox"]:checked ~ .checkbox-content {
  color: var(--color-primary);
}

.checkbox-card:has(input:checked) {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(74, 105, 255, 0.1) 0%, rgba(107, 127, 255, 0.05) 100%);
}

.checkbox-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
  color: var(--color-text);
  transition: color var(--transition-base);
}

.checkbox-content .material-symbols-outlined {
  font-size: 32px;
}

.alert {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
}

.alert .material-symbols-outlined {
  flex-shrink: 0;
  font-size: 24px;
}

.alert-info {
  background-color: var(--color-info-light);
  border-left-color: var(--color-info);
  color: var(--color-text);
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-left-color: var(--color-warning);
  color: var(--color-text);
}

.alert strong {
  display: block;
  margin-bottom: var(--spacing-xs);
}

.alert p, .alert ul {
  margin: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.alert ul {
  padding-left: var(--spacing-lg);
}

.file-input-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.file-input-wrapper input[type="file"] {
  display: none;
}

.file-input-label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-bg-tertiary);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.file-input-label:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.file-input-label .material-symbols-outlined {
  font-size: 24px;
}

.file-name {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-style: italic;
}

.import-preview {
  padding: var(--spacing-lg);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.import-preview h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.preview-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.stat-item .material-symbols-outlined {
  font-size: 24px;
  color: var(--color-primary);
}

.stat-item div {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.stat-item strong {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.stat-item span {
  font-size: var(--font-size-base);
  color: var(--color-text);
}


/* =================================================================
   APPEARANCE DESIGNER
   ================================================================= */

.appearance {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.appearance-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-xl);
}

.appearance-helper {
  color: var(--color-text-secondary);
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.appearance-eyebrow {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-xs);
}

.appearance-panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.appearance-panel-header h3 {
  margin: 0;
}

.appearance-panel-header p {
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.appearance-fields {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.appearance-field {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.appearance-field-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.appearance-field-label {
  font-weight: 600;
  color: var(--color-text);
}

.appearance-field-value {
  font-family: 'Manrope', monospace;
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.appearance-field-control {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.appearance-field-control input[type="color"] {
  width: 56px;
  height: 56px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-secondary);
  padding: 0;
  cursor: pointer;
}

.appearance-field-control small {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
}

.appearance-presets {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.appearance-presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.appearance-preset-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  background: var(--color-bg-secondary);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.appearance-preset-info {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.appearance-preset-info h4 {
  margin: 0;
  font-size: var(--font-size-lg);
}

.appearance-preset-info p {
  margin: var(--spacing-xs) 0 0 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.appearance-preset-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-md);
}

.preset-swatch {
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  min-height: 80px;
  display: flex;
  align-items: flex-end;
  font-weight: 600;
  box-shadow: var(--shadow-subtle);
}

.appearance-status {
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-secondary);
  border: 1px dashed var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: opacity var(--transition-base);
  opacity: 0.85;
}

.appearance-status.active {
  opacity: 1;
  border-color: var(--color-primary);
}

@media (max-width: 768px) {
  .appearance-header {
    flex-direction: column;
  }

  .appearance-preset-info {
    flex-direction: column;
  }
}