:root {
  --color-primary: #016cd2;
  --color-accent: #7b1eb9;
  --color-action: #0d6efd;
  --color-warning: #ffb72c;
  --color-black: #0f172a;
  --color-white: #ffffff;
  --color-primary-rgb: 1, 108, 210;
  --color-accent-rgb: 123, 30, 185;
  --color-white-rgb: 255, 255, 255;
  --color-gradient-main: linear-gradient(90deg, var(--color-primary), var(--color-accent) 94.24%);
  --color-gradient-card: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  --color-gradient-subtle: linear-gradient(90deg, rgba(1, 108, 210, 0.1) 0%, rgba(123, 30, 185, 0.1) 100%);
  --color-grey-light: #f8fafc;
  --color-grey-medium: #e2e8f0;
  --color-grey-dark: #475569;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-info: var(--color-action);
  --color-background: #ffffff;
  --color-surface: #f8fafc;
  --color-border: #e2e8f0;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-active-green: #16a249;
  --color-active-green-rgb: 22, 162, 73;
  --color-gray-text: #737373;
  --color-gray-border: #dee3e8;
  --color-gray-border-light: #f0f2f4;
  --color-zinc-text: #3f3f46;
  --color-slate-bg: #f4f4f5;
  --color-slate-bg-light: #f1f5f9;
  --color-slate-text: #0f172a;
  --color-dark-text: #161a22;
  --color-secondary-text: #65758b;
  --color-heading-text: #242b32;
  --color-focus-bg: #fcfcfc;
  --color-focus-border: #006be6;
  --color-white-pure: #fff;
  --color-black-pure: #000;
  --color-warning-orange: #ffb22e;
  --color-success-green: #22c55e;
  --color-success-green-dark: #16a34a;
  --color-blue-bright: #3b82f6;
  --color-blue-dark: #0064d6;
  --color-purple-bright: #a855f7;
  --color-cyan-bright: #06b6d4;
  --color-orange-bright: #f97316;
  --color-amber-bright: #f59e0b;
  --color-text-dark: #020817;
  --color-text-medium: #333;
  --color-border-gray: #e5e7eb;
  --color-border-slate: #e2e8f0;
  --color-radio-border: #0056d6;
  --color-radio-checked: #0056d6;
  --color-success-059: #059669;
  --gradient-avatar: linear-gradient(135deg, #006be6 0%, #551abc 100%);
  --gradient-card-alt: linear-gradient(90deg, #006cd2 0%, #00a3ff 94.24%);
  --gradient-icon: linear-gradient(135deg, #0059d6 0%, #6514c8 100%);
  --gradient-icon-alt: linear-gradient(135deg, #0056d6 0%, #831db9 100%);
  --gradient-form-header: linear-gradient(95deg, rgba(0, 89, 214, 0.1) 0%, rgba(101, 20, 200, 0.05) 100%);
  --gradient-form-header-alt: linear-gradient(101deg, rgba(0, 89, 214, 0.1) 0%, rgba(101, 20, 200, 0.05) 100%);
  --gradient-primary-accent: linear-gradient(135deg, #006cd2 0%, #7b1eb9 100%);
  --bg-primary-010: rgba(1, 108, 210, 0.1);
  --bg-primary-005: rgba(1, 108, 210, 0.05);
  --bg-active-green-010: rgba(22, 162, 73, 0.1);
  --bg-active-green-020: rgba(22, 162, 73, 0.2);
  --bg-success-green-020: rgba(34, 197, 94, 0.2);
  --bg-success-green-030: rgba(16, 185, 129, 0.3);
  --bg-danger-010: rgba(239, 68, 68, 0.1);
  --bg-info-010: rgba(0, 112, 209, 0.1);
  --border-primary-020: rgba(1, 108, 210, 0.2);
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-toast: 0 10px 40px rgba(0, 0, 0, 0.1), 0 4px 25px rgba(0, 0, 0, 0.05);
  --shadow-focus-primary: 0 0 0 1px #006be6;
  --shadow-custom-1: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --font-family-base: 'Nunito', system-ui, -apple-system, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --radius-sm: 0.25rem;
  --radius-base: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --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);
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --layout-sidebar-width: 255px;
  --layout-topbar-height: 77px;
}

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

body {
  font-family: var(--font-family-base);
  background: linear-gradient(90deg, rgba(1, 108, 210, 0.05) 0%, rgba(1, 108, 210, 0) 100%), #fff;
  color: var(--color-text-primary);
  font-size: 0.875rem;
  line-height: var(--line-height-normal);
}

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

a:hover {
  color: var(--color-blue-dark);
}

h1, h2, h3, h4 {
  color: var(--color-heading-text);
  font-weight: var(--font-weight-bold);
  margin: 0;
}

h1 {
  font-size: 1.5rem;
  line-height: 2rem;
}

h2 {
  font-size: 1.25rem;
  line-height: 1.75rem;
}

h3 {
  font-size: 1.125rem;
  line-height: 1.5rem;
}

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

.sidebar {
  width: var(--layout-sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: fixed;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--space-6) var(--space-4);
  gap: var(--space-6);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading-text);
  font-size: 1.25rem;
}

.sidebar-header h2 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
}

.sidebar-header span {
  background: var(--gradient-icon);
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
}

.sidebar-section-label {
  color: var(--color-gray-text);
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.nav-links a {
  color: var(--color-zinc-text);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-links a:hover {
  background: var(--color-slate-bg-light);
  color: var(--color-primary);
}

.nav-links a.active {
  background: var(--color-slate-bg);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

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

.topbar {
  height: var(--layout-topbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: fixed;
  top: 0;
  right: 0;
  left: var(--layout-sidebar-width);
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 var(--space-6);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--gradient-avatar);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
}

.content-wrapper {
  padding: 20px 26px;
  margin-top: var(--layout-topbar-height);
  flex: 1;
}

.app-guest .app-layout {
  display: block;
}

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

.app-guest .content-wrapper {
  margin-top: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-top: 0.35rem;
}

.card {
  background: var(--color-white);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  padding: 25px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.card + .card {
  margin-top: var(--space-6);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.form-card {
  max-width: 640px;
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 15px;
  border-radius: 10px;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  line-height: 1.25rem;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
  gap: 0.5rem;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

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

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

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

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

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

.btn-text {
  background: none;
  border: none;
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  padding: 0;
}

.btn-text:hover {
  color: var(--color-blue-dark);
  text-decoration: underline;
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
}

.form-input,
input[type='text'],
input[type='email'],
input[type='password'],
input[type='file'],
select,
textarea {
  width: 100%;
  padding: 11px 13px;
  border-radius: 12px;
  border: 1px solid var(--color-gray-border-light);
  background: var(--color-white);
  color: var(--color-text-dark);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  transition: border var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.form-input:focus,
input[type='text']:focus,
input[type='email']:focus,
input[type='password']:focus,
input[type='file']:focus,
select:focus,
textarea:focus {
  outline: none;
  border: 1px solid var(--color-focus-border);
  background: var(--color-focus-bg);
  box-shadow: var(--shadow-focus-primary);
}

.helper-text {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  margin-top: 0.35rem;
}

.badge-green,
.badge-yellow,
.badge-blue,
.badge-red,
.badge-gray {
  border-radius: var(--radius-full);
  padding: 3px 11px;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.badge-green {
  background: var(--color-active-green);
  color: var(--color-white);
}

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

.badge-blue {
  background: var(--color-blue-dark);
  color: var(--color-white);
}

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

.badge-gray {
  background: var(--color-gray-100);
  color: var(--color-text-primary);
}

.progress-track {
  background: var(--color-gray-200);
  border-radius: 8px;
  height: 8px;
  width: 100%;
  overflow: hidden;
}

.progress-track-lg {
  height: 12px;
}

.progress-fill {
  background: var(--color-gradient-main);
  height: 100%;
  border-radius: 8px;
  transition: width 0.5s ease-out;
}

.table-wrapper {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

th {
  background: rgba(241, 245, 249, 0.4);
  color: var(--color-text-dark);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

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

tr:hover td {
  background: rgba(241, 245, 249, 0.4);
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.875rem;
  border: 1px solid transparent;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--color-danger);
}

.alert-success {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.35);
  color: var(--color-success-059);
}

.grid-cards {
  display: grid;
  gap: 20px;
  margin-bottom: 30px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-border);
  padding: 25px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.stat-card--neutral {
  border-top: 4px solid var(--color-gray-200);
}

.stat-card--info {
  border-top: 4px solid var(--color-blue-dark);
}

.stat-card--warning {
  border-top: 4px solid var(--color-warning);
}

.stat-card--success {
  border-top: 4px solid var(--color-success);
}

.stat-card--danger {
  border-top: 4px solid var(--color-danger);
}

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

.stat-value {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-heading-text);
}

.upload-form {
  margin-top: var(--space-4);
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.tab {
  padding: 10px 16px;
  color: var(--color-text-secondary);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-weight: var(--font-weight-medium);
}

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

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

.text-green {
  color: var(--color-success-059);
}

.text-gray {
  color: var(--color-text-secondary);
}

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

.text-danger {
  color: var(--color-danger);
}

.auth-container {
  max-width: 420px;
  width: 100%;
  padding: 32px;
  background: var(--color-white);
  border-radius: 16px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

.auth-container h2 {
  margin-bottom: 20px;
  text-align: center;
  font-size: 1.5rem;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  color: var(--color-text-secondary);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pagination {
  display: flex;
  gap: 10px;
  align-items: center;
}

@media (max-width: 1200px) {
  .grid-5 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

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

  .topbar {
    position: static;
    width: 100%;
    left: 0;
  }

  .content-wrapper {
    margin-top: 0;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .upload-form {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .card {
    padding: 20px;
  }

  th, td {
    padding: 12px;
  }

  .btn {
    width: 100%;
  }

  .card-actions {
    width: 100%;
  }

  .card-actions .btn {
    width: 100%;
  }
  
}