/*
 * Ultreia Admin Design System
 * Mobile-first, Camino-inspired
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Color Palette - Earthy, muted, expressive */
  --color-primary-50: #f0f5f1;
  --color-primary-100: #dce8de;
  --color-primary-200: #b8d1bc;
  --color-primary-300: #8fb896;
  --color-primary-400: #6a9e73;
  --color-primary-500: #4a7c54;
  --color-primary-600: #3d6545;
  --color-primary-700: #325238;
  --color-primary-800: #2a422e;
  --color-primary-900: #1e2f21;

  --color-secondary-50: #fdf6f3;
  --color-secondary-100: #fae8e0;
  --color-secondary-200: #f5d0c1;
  --color-secondary-300: #e8a989;
  --color-secondary-400: #d98860;
  --color-secondary-500: #c46d42;
  --color-secondary-600: #a65636;
  --color-secondary-700: #89452e;
  --color-secondary-800: #6e3826;
  --color-secondary-900: #4a2619;

  --color-accent-50: #fefaed;
  --color-accent-100: #fdf3d0;
  --color-accent-200: #fae49e;
  --color-accent-300: #f5d06a;
  --color-accent-400: #e9b83e;
  --color-accent-500: #d49a1f;
  --color-accent-600: #b37a16;
  --color-accent-700: #8f5c14;
  --color-accent-800: #734817;
  --color-accent-900: #5c3a15;

  /* Neutrals - Warm undertone */
  --color-neutral-50: #fafaf9;
  --color-neutral-100: #f5f4f2;
  --color-neutral-200: #e8e6e3;
  --color-neutral-300: #d6d3ce;
  --color-neutral-400: #a8a49c;
  --color-neutral-500: #78746b;
  --color-neutral-600: #5c5850;
  --color-neutral-700: #45423c;
  --color-neutral-800: #302e2a;
  --color-neutral-900: #1c1b18;

  /* Semantic Colors */
  --color-success-100: #e8f5eb;
  --color-success-500: #5a9a6a;
  --color-success-600: #4a8058;
  --color-success-700: #3d6848;
  --color-warning-500: #d4920a;
  --color-warning-600: #b37a08;
  --color-danger-100: #fceae8;
  --color-danger-500: #c45a4a;
  --color-danger-600: #a64a3c;
  --color-danger-700: #8a3d32;
  --color-info-500: #5a8aa0;
  --color-info-600: #4a7288;
  --color-highlight-traditional: var(--color-accent-100);

  /* Applied Colors */
  --bg-page: var(--color-neutral-100);
  --bg-surface: #ffffff;
  --bg-surface-raised: #ffffff;
  --bg-surface-sunken: var(--color-neutral-50);
  --bg-interactive: var(--color-neutral-200);
  --bg-interactive-hover: var(--color-neutral-300);

  --text-primary: var(--color-neutral-800);
  --text-secondary: var(--color-neutral-600);
  --text-tertiary: var(--color-neutral-500);
  --text-inverse: #ffffff;
  --text-link: var(--color-primary-600);
  --text-link-hover: var(--color-primary-700);

  --border-default: var(--color-neutral-200);
  --border-strong: var(--color-neutral-300);
  --border-focus: var(--color-primary-400);

  /* Typography */
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* Spacing */
  --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;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --sidebar-width: 16rem;
  --header-height: 3.5rem;
  --content-max-width: 64rem;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  font-feature-settings: "kern" 1, "liga" 1;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas {
  display: block;
  max-width: 100%;
}

/* SVGs need special handling - don't constrain icons */
svg {
  display: block;
}

/* Inline icons in buttons/links should not be constrained */
.btn svg,
button svg,
a svg {
  max-width: none;
  flex-shrink: 0;
}

input, button, textarea, select {
  font: inherit;
}

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

a:hover {
  color: var(--text-link-hover);
}

a.btn {
  color: inherit;
}

a.btn:hover {
  color: inherit;
}

/* Ensure white text on colored button backgrounds (override a.btn inherit) */
a.btn--primary,
a.btn--primary:hover,
a.btn--danger,
a.btn--danger:hover {
  color: var(--text-inverse);
}

/* ============================================
   Layout: Mobile-First Admin Shell
   ============================================ */
.admin-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Mobile Header */
.admin-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary-700);
  color: var(--text-inverse);
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  gap: var(--space-4);
}

.admin-header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.admin-header__menu-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.admin-header__logo {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.admin-header__logo-icon {
  width: 1.5rem;
  height: 1.5rem;
  background: var(--color-accent-400);
  border-radius: var(--radius-full);
}

/* Sidebar Navigation */
.admin-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-default);
  z-index: 100000;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.admin-sidebar__header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border-default);
}

.admin-sidebar__close {
  margin-left: auto;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
}

.admin-sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
}

.admin-sidebar__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 99999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.admin-sidebar__overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* Navigation Items */
.nav-section {
  margin-bottom: var(--space-6);
}

.nav-section__title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--text-tertiary);
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-item:hover {
  background: var(--bg-interactive);
  color: var(--text-primary);
}

.nav-item.is-active {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.nav-item__icon {
  width: 1.25rem;
  height: 1.25rem;
  opacity: 0.7;
}

.nav-badge {
  margin-left: auto;
  background: var(--color-danger-500);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 9999px;
  min-width: 18px;
  text-align: center;
}

/* Main Content Area */
.admin-main {
  flex: 1;
  padding: var(--space-4);
}

.admin-main__content {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* ============================================
   Typography
   ============================================ */
.heading-1 {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.heading-2 {
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.heading-3 {
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.font-medium { font-weight: 500; }
.font-mono { font-family: var(--font-mono); }

/* ============================================
   Page Header
   ============================================ */
.page-header {
  margin-bottom: var(--space-6);
}

.page-header__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-header__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.page-header__breadcrumb a {
  color: var(--text-secondary);
}

.page-header__breadcrumb-sep {
  color: var(--text-tertiary);
}

.page-header__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

.page-header__actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card__header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.card__title {
  font-size: var(--text-base);
  font-weight: 600;
}

.card__body {
  padding: var(--space-4);
}

.card__footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-default);
  background: var(--bg-surface-sunken);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-primary-600);
  color: var(--text-inverse);
  border-color: var(--color-primary-600);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
}

.btn--secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn--secondary:hover:not(:disabled) {
  background: var(--bg-interactive);
  border-color: var(--border-strong);
}

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

.btn--ghost:hover:not(:disabled) {
  background: var(--bg-interactive);
  color: var(--text-primary);
}

.btn--danger {
  background: var(--color-danger-500);
  color: var(--text-inverse);
  border-color: var(--color-danger-500);
}

.btn--danger:hover:not(:disabled) {
  background: var(--color-danger-600);
  border-color: var(--color-danger-600);
}

.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn--icon {
  padding: var(--space-2);
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-label--required::after {
  content: " *";
  color: var(--color-danger-500);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-checkbox__input {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--color-primary-600);
}

.form-checkbox__label {
  font-size: var(--text-base);
  color: var(--text-primary);
  user-select: none;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

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

.form-input--error,
.form-textarea--error {
  border-color: var(--color-danger-500);
}

.form-input--error:focus,
.form-textarea--error:focus {
  box-shadow: 0 0 0 3px rgba(196, 90, 74, 0.15);
}

.form-textarea {
  min-height: 8rem;
  resize: vertical;
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger-500);
  margin-top: var(--space-1);
}

.checkbox-label-inline {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.checkbox-label-inline input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  accent-color: var(--color-primary-500);
  cursor: pointer;
}

.form-actions {
  display: flex;
  gap: var(--space-3);
  padding-top: var(--space-4);
}

/* File Input */
.form-file {
  position: relative;
}

.form-file__input {
  width: 100%;
  padding: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  background: var(--bg-surface-sunken);
  border: 2px dashed var(--border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.form-file__input:hover {
  border-color: var(--border-strong);
  background: var(--bg-interactive);
}

.form-file__input:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* Radio & Checkbox Groups */
.form-choice-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.form-choice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
}

.form-choice__input {
  margin-top: 0.125rem;
  accent-color: var(--color-primary-600);
}

.form-choice__label {
  font-weight: 500;
  color: var(--text-primary);
}

.form-choice__description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

/* Tri-state Toggle (yes/unknown/no) */
.tristate {
  display: inline-flex;
  background: var(--bg-surface-sunken);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
}

.tristate__input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tristate__label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2rem;
  border-radius: calc(var(--radius-md) - 2px);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-tertiary);
}

.tristate__label:hover {
  background: var(--bg-interactive);
  color: var(--text-secondary);
}

.tristate__label svg {
  width: 18px;
  height: 18px;
}

/* Selected states */
.tristate__input:checked + .tristate__label--yes {
  background: var(--color-success-100);
  color: var(--color-success-700);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tristate__input:checked + .tristate__label--unknown {
  background: var(--color-neutral-200);
  color: var(--color-neutral-600);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tristate__input:checked + .tristate__label--no {
  background: var(--color-danger-100);
  color: var(--color-danger-700);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Focus state */
.tristate__input:focus-visible + .tristate__label {
  outline: 2px solid var(--border-focus);
  outline-offset: 1px;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--text-tertiary);
  background: var(--bg-surface-sunken);
  border-bottom: 1px solid var(--border-default);
}

.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-default);
  vertical-align: top;
}

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

.table tr:hover td {
  background: var(--bg-surface-sunken);
}

.table__stacked {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.feature-icons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  color: var(--text-tertiary);
}

.feature-icons svg {
  opacity: 0.7;
}

.feature-icons svg:hover {
  opacity: 1;
}

.warning-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-danger-600);
  font-size: var(--text-xs);
  font-weight: 500;
}

.warning-badge__label {
  white-space: nowrap;
}

.warning-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.table__actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
  align-items: flex-start;
}

.table__actions .btn--ghost {
  color: var(--text-tertiary);
}

.table__actions .btn--ghost:hover {
  color: var(--text-primary);
  background: var(--bg-interactive);
}

.table__actions .btn--danger-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-tertiary);
}

.table__actions .btn--danger-ghost:hover {
  color: var(--color-danger-500);
  background: var(--color-danger-100);
}

/* Responsive table - stack on mobile */
@media (max-width: 640px) {
  .table--responsive thead {
    display: none;
  }

  .table--responsive tr {
    display: block;
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-default);
  }

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

  .table--responsive td {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border-bottom: none;
  }

  .table--responsive td::before {
    content: attr(data-label);
    font-weight: 600;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--text-tertiary);
  }

  .table--responsive td:has(.table__actions) {
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-default);
    margin-top: var(--space-2);
  }
}

/* ============================================
   Data Display
   ============================================ */
.data-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.data-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.data-item__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--text-tertiary);
}

.data-item__value {
  color: var(--text-primary);
}

.data-item__value--mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background: var(--bg-surface-sunken);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* ============================================
   Badges & Tags
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-interactive);
  color: var(--text-secondary);
}

.badge--success {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge--warning {
  background: var(--color-accent-100);
  color: var(--color-accent-700);
}

.badge--danger {
  background: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge--info {
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

/* ============================================
   Filter Pills
   ============================================ */
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border-default);
  transition: all 0.15s ease;
}

.filter-pill:hover {
  background: var(--bg-interactive);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.filter-pill--active {
  background: var(--color-primary-600);
  color: white;
  border-color: var(--color-primary-600);
}

.filter-pill--active:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: white;
}

/* ============================================
   Flash Messages / Alerts
   ============================================ */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.alert--success {
  background: var(--color-primary-50);
  color: var(--color-primary-800);
  border: 1px solid var(--color-primary-200);
}

.alert--error {
  background: var(--color-secondary-50);
  color: var(--color-secondary-800);
  border: 1px solid var(--color-secondary-200);
}

.alert--warning {
  background: var(--color-accent-50);
  color: var(--color-accent-800);
  border: 1px solid var(--color-accent-200);
}

.alert--info {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
  border: 1px solid var(--color-neutral-200);
}

/* ============================================
   Empty States
   ============================================ */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
}

.empty-state__icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--space-4);
  color: var(--text-tertiary);
}

.empty-state__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.empty-state__description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  max-width: 24rem;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Stats / Metrics
   ============================================ */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat__value {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.stats-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
}

/* ============================================
   Utilities
   ============================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

/* ============================================
   Desktop Styles (768px+)
   ============================================ */
@media (min-width: 768px) {
  :root {
    --header-height: 4rem;
  }

  .admin-header__menu-btn {
    display: none;
  }

  .admin-sidebar {
    transform: translateX(0);
    top: var(--header-height);
  }

  .admin-sidebar__header {
    display: none;
  }

  .admin-sidebar__overlay {
    display: none;
  }

  .admin-main {
    margin-left: var(--sidebar-width);
    padding: var(--space-6);
  }

  .page-header__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-header__actions {
    margin-top: 0;
  }

  .form-choice-group--inline {
    flex-direction: row;
    gap: var(--space-6);
  }

  .data-list--grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4) var(--space-8);
  }
}

/* ============================================
   Large Desktop Styles (1024px+)
   ============================================ */
@media (min-width: 1024px) {
  .data-list--grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   Login Page
   ============================================ */
.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-neutral-100) 50%, var(--color-secondary-50) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.login-container {
  width: 100%;
  max-width: 24rem;
}

.login-card {
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
}

.login-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.login-logo {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.login-logo__icon {
  width: 4rem;
  height: 4rem;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
  border-radius: var(--radius-lg);
  position: relative;
}

.login-logo__icon::before {
  content: "";
  position: absolute;
  inset: 0.75rem;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2'%3E%3Cpath d='M12 2L2 7l10 5 10-5-10-5zM2 17l10 5 10-5M2 12l10 5 10-5'/%3E%3C/svg%3E") center / contain no-repeat;
}

.login-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.login-actions {
  margin-top: var(--space-2);
}

.btn--full {
  width: 100%;
  justify-content: center;
}

/* User menu in sidebar */
.sidebar-user {
  padding: var(--space-4);
  border-top: 1px solid var(--border-default);
  margin-top: auto;
}

.sidebar-user__info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.sidebar-user__avatar {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-primary-100);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-600);
}

.sidebar-user__name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.sidebar-user__email {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.btn--logout {
  width: 100%;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
}

.btn--logout:hover {
  background: var(--bg-interactive);
  color: var(--text-primary);
}

/* ==========================================================================
   Image Upload & Gallery
   ========================================================================== */

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: var(--bg-primary);
  margin-bottom: var(--space-4);
}

.upload-zone:hover {
  border-color: var(--color-primary-400);
  background: var(--color-primary-50);
}

.upload-zone--active {
  border-color: var(--color-primary-500);
  background: var(--color-primary-100);
  border-style: solid;
}

.upload-zone__input {
  display: none;
}

.upload-zone__content {
  pointer-events: none;
}

.upload-zone__icon {
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}

.upload-zone:hover .upload-zone__icon {
  color: var(--color-primary-500);
}

.upload-zone__text {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-primary);
  margin: 0 0 var(--space-1) 0;
}

.upload-zone__hint {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0 0 var(--space-2) 0;
}

.upload-zone__formats {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin: 0;
}

/* Image Gallery */
.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

@media (min-width: 768px) {
  .image-gallery {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

.image-gallery__empty {
  text-align: center;
  padding: var(--space-6);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

.image-gallery__hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin: 0;
}

/* Image Card */
.image-card {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid transparent;
  transition: all var(--transition-base);
}

.image-card:hover {
  border-color: var(--color-primary-300);
}

.image-card--featured {
  border-color: var(--color-accent-400);
}

.image-card--dragging {
  opacity: 0.5;
  transform: scale(0.95);
}

.image-card--uploading {
  opacity: 0.7;
}

.image-card__preview {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  position: relative;
}

.image-card__preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-card__badge {
  position: absolute;
  top: var(--space-1);
  left: var(--space-1);
  background: var(--color-accent-500);
  color: white;
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.image-card__spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-default);
  border-top-color: var(--color-primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.image-card__error {
  color: var(--color-danger-500);
  font-size: var(--text-xs);
  font-weight: 500;
}

.image-card__info {
  padding: var(--space-2);
}

.image-card__filename {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.image-card__status {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.image-card__actions {
  position: absolute;
  top: var(--space-1);
  right: var(--space-1);
  display: flex;
  gap: var(--space-1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.image-card:hover .image-card__actions {
  opacity: 1;
}

.image-card__action {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.image-card__action:hover {
  background: var(--color-primary-500);
  color: white;
}

.image-card__action--danger:hover {
  background: var(--color-danger-500);
}

/* ============================================
   JSON Import Diff View
   ============================================ */
.json-diff {
  background: var(--bg-surface-sunken);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  max-height: 300px;
  overflow-y: auto;
}

.diff-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-default);
}

.diff-select-all {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
}

.diff-select-all input {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary-600);
}

.diff-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.diff-item {
  display: grid;
  grid-template-columns: 24px 140px auto 1fr 1fr;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-2);
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}

.diff-checkbox {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary-600);
  cursor: pointer;
}

@media (max-width: 640px) {
  .diff-item {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-2);
  }
  .diff-checkbox {
    flex-shrink: 0;
  }
  .diff-field {
    flex: 1;
    min-width: 80px;
  }
  .diff-arrow {
    display: none;
  }
  .diff-old,
  .diff-new {
    width: 100%;
    padding-left: 24px;
    font-size: var(--text-xs);
  }
}

.diff-field {
  font-weight: 500;
  color: var(--text-primary);
}

.diff-arrow {
  color: var(--text-tertiary);
  text-align: center;
}

.diff-old {
  color: var(--color-danger-600);
  text-decoration: line-through;
  opacity: 0.7;
}

.diff-new {
  color: var(--color-success-600);
  font-weight: 500;
}

/* OSM Results */
.osm-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.osm-result {
  padding: var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.osm-result:hover {
  border-color: var(--color-primary-400);
  background: var(--color-primary-50);
}

.osm-result-name {
  font-weight: 500;
  color: var(--text-primary);
}

.osm-result-meta {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.osm-id {
  font-family: var(--font-mono);
}

.spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Research Links */
.research-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg-surface-sunken);
  border-radius: var(--radius-md);
}

/* Responsive utilities */
.show-on-mobile {
  display: none;
}

@media (max-width: 640px) {
  .hide-on-mobile {
    display: none;
  }
  .show-on-mobile {
    display: inline;
  }
}