/**
 * a11yOS Global Style Guide
 * Version 1.0.0
 *
 * Pencil Aesthetic Design System
 * - Minimalist, clean, professional
 * - WCAG 2.1 AA compliant
 * - Consistent across all application components
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
  /* Colors - Monochrome Primary */
  --color-primary: #1a1a1a;
  --color-primary-dark: #000000;
  --color-primary-light: #404040;

  /* Colors - Accent */
  --color-accent-green: #047857;
  --color-accent-green-dark: #065f46;
  --color-accent-green-light: #10b981;

  --color-accent-blue: #3b82f6;
  --color-accent-blue-dark: #2563eb;
  --color-accent-blue-light: #60a5fa;

  /* Colors - Background */
  --color-bg-base: #FAFAFA;
  --color-bg-subtle: #FFFFFF;
  --color-bg-elevated: #FFFFFF;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);

  /* Colors - Border */
  --color-border-subtle: rgba(0, 0, 0, 0.12);
  --color-border-medium: rgba(0, 0, 0, 0.2);
  --color-border-strong: rgba(0, 0, 0, 0.3);

  /* Colors - Text */
  --color-text-strong: #000000;
  --color-text-medium: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-text-inverse: #FFFFFF;

  /* Colors - Semantic */
  --color-success: #047857;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-success-border: rgba(16, 185, 129, 0.3);

  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-warning-border: rgba(245, 158, 11, 0.3);

  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  --color-danger-border: rgba(239, 68, 68, 0.3);

  --color-info: #6b7280;
  --color-info-bg: rgba(107, 114, 128, 0.1);
  --color-info-border: rgba(107, 114, 128, 0.3);

  /* Typography - Font Families */
  --font-family-base: -apple-system, BlinkMacSystemFont, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;

  /* Typography - Font Sizes */
  --font-size-h1: 28px;
  --font-size-h2: 22px;
  --font-size-h3: 18px;
  --font-size-body: 14px;
  --font-size-small: 12px;
  --font-size-tiny: 11px;

  /* Typography - Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Typography - Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;

  /* Spacing Scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-3xl: 48px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 18px;
  --radius-pill: 999px;

  /* Shadows - Pencil Aesthetic */
  --shadow-sm: 2px 2px 0 rgba(0, 0, 0, 0.05), 4px 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 3px 3px 0 rgba(0, 0, 0, 0.05), 6px 6px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 4px 4px 0 rgba(0, 0, 0, 0.08), 8px 8px 16px rgba(0, 0, 0, 0.12);

  /* Focus Ring */
  --focus-ring: 0 0 0 3px rgba(4, 120, 87, 0.3);
  --focus-outline: 2px solid var(--color-accent-green);
  --focus-offset: 3px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --layout-max-width: 1280px;
  --layout-gutter: 24px;

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-tooltip: 1600;
  --z-widget: 2147483646;
  --z-widget-top: 2147483647;
}

/* ============================================
   BASE STYLES
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-body);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-medium);
  background: var(--color-bg-base);
  min-height: 100vh;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text-strong);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
}

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

a:hover {
  color: var(--color-accent-green-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
  border-radius: 2px;
}

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

.a11yos-btn,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-family-base);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: 1.5px solid;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  outline: none;
  user-select: none;
  position: relative;
  min-height: 44px;
}

.a11yos-btn:focus-visible,
.btn:focus-visible {
  box-shadow: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.a11yos-btn:active,
.btn:active {
  transform: translateY(1px);
}

.a11yos-btn:disabled,
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button Variants */
.a11yos-btn-primary,
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.a11yos-btn-primary:hover,
.btn-primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  text-decoration: none;
}

.a11yos-btn-secondary,
.btn-secondary {
  background: var(--color-bg-subtle);
  color: var(--color-text-medium);
  border-color: var(--color-border-medium);
}

.a11yos-btn-secondary:hover,
.btn-secondary:hover {
  background: var(--color-bg-base);
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.a11yos-btn-accent,
.btn-success {
  background: var(--color-accent-green);
  color: var(--color-text-inverse);
  border-color: var(--color-accent-green);
}

.a11yos-btn-accent:hover,
.btn-success:hover {
  background: var(--color-accent-green-dark);
  color: var(--color-text-inverse);
  border-color: var(--color-accent-green-dark);
  text-decoration: none;
}

.a11yos-btn-blue {
  background: var(--color-accent-blue);
  color: var(--color-text-inverse);
  border-color: var(--color-accent-blue);
}

.a11yos-btn-blue:hover {
  background: var(--color-accent-blue-dark);
  border-color: var(--color-accent-blue-dark);
  text-decoration: none;
}

.a11yos-btn-ghost,
.btn-ghost {
  background: transparent;
  color: var(--color-text-medium);
  border-color: transparent;
}

.a11yos-btn-ghost:hover,
.btn-ghost:hover {
  background: var(--color-bg-base);
  border-color: var(--color-border-subtle);
  text-decoration: none;
}

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

.btn-danger:hover {
  background: #dc2626;
  border-color: #dc2626;
  text-decoration: none;
}

/* Button Sizes */
.a11yos-btn-sm,
.btn-small {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-small);
  min-height: 36px;
}

.a11yos-btn-lg,
.btn-large {
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--font-size-body);
}

/* Icon Button */
.a11yos-btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.a11yos-input,
.a11yos-textarea,
.a11yos-select,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-family-base);
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
  color: var(--color-text-medium);
  background: var(--color-bg-subtle);
  border: 1.5px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
  min-height: 44px;
}

.a11yos-input:hover,
.a11yos-textarea:hover,
.a11yos-select:hover,
input:hover,
textarea:hover,
select:hover {
  border-color: var(--color-border-medium);
}

.a11yos-input:focus,
.a11yos-textarea:focus,
.a11yos-select:focus,
input:focus,
textarea:focus,
select:focus {
  border-color: var(--color-accent-green);
  box-shadow: var(--focus-ring);
}

.a11yos-input::placeholder,
.a11yos-textarea::placeholder,
input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

.a11yos-textarea,
textarea {
  min-height: 120px;
  resize: vertical;
}

.a11yos-label,
label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-strong);
}

.a11yos-form-group,
.form-group {
  margin-bottom: var(--space-lg);
}

.a11yos-form-hint {
  margin-top: var(--space-xs);
  font-size: 14px;
  color: var(--color-text-muted);
}

.a11yos-form-error {
  margin-top: var(--space-xs);
  font-size: 16px;
  color: var(--color-danger);
}

.a11yos-form-actions,
.form-actions {
  margin-top: var(--space-xl);
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

/* Checkbox & Radio */
.a11yos-checkbox,
.a11yos-radio,
input[type="checkbox"],
input[type="radio"] {
  appearance: none;
  width: 20px;
  height: 20px;
  min-width: 20px;
  min-height: 20px;
  border: 1.5px solid var(--color-border-medium);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
}

.a11yos-radio,
input[type="radio"] {
  border-radius: 50%;
}

.a11yos-checkbox:checked,
.a11yos-radio:checked,
input[type="checkbox"]:checked,
input[type="radio"]:checked {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
}

.a11yos-checkbox:checked::after,
input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 2px;
  width: 6px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.a11yos-radio:checked::after,
input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  background: white;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.a11yos-checkbox:focus-visible,
.a11yos-radio:focus-visible,
input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-border-medium);
  border-radius: var(--radius-pill);
  transition: var(--transition-base);
  border: 1.5px solid var(--color-border-medium);
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background: white;
  border-radius: 50%;
  transition: var(--transition-base);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(24px);
}

.toggle-switch input:focus-visible + .toggle-slider {
  box-shadow: var(--focus-ring);
}

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

.a11yos-card,
.card {
  background: var(--color-bg-subtle);
  border: 1.5px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  margin-bottom: var(--space-xl);
}

.a11yos-card:hover,
.card:hover {
  border-color: var(--color-border-medium);
  box-shadow: var(--shadow-md);
}

.a11yos-card-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1.5px solid var(--color-border-subtle);
}

.a11yos-card-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-strong);
  margin: 0;
}

.a11yos-card-body {
  margin-bottom: var(--space-lg);
}

.a11yos-card-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1.5px solid var(--color-border-subtle);
}

/* ============================================
   BADGES
   ============================================ */

.a11yos-badge,
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.a11yos-badge-default {
  background: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-info-border);
}

.a11yos-badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success-border);
}

.a11yos-badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning-border);
}

.a11yos-badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid var(--color-danger-border);
}

/* ============================================
   ALERTS
   ============================================ */

.a11yos-alert {
  padding: var(--space-lg);
  border: 1.5px solid;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.a11yos-alert-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border-color: var(--color-info-border);
}

.a11yos-alert-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success-border);
}

.a11yos-alert-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: var(--color-warning-border);
}

.a11yos-alert-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}

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

.a11yos-modal-backdrop,
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.a11yos-modal-backdrop.active,
.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.a11yos-modal,
.modal-content {
  background: var(--color-bg-subtle);
  border: 1.5px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-base);
  z-index: var(--z-modal);
}

.a11yos-modal-backdrop.active .a11yos-modal,
.modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.a11yos-modal-header,
.modal-header {
  padding: var(--space-xl);
  border-bottom: 1.5px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.a11yos-modal-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-strong);
  margin: 0;
}

.a11yos-modal-close,
.modal-close {
  width: 32px;
  height: 32px;
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 24px;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.a11yos-modal-close:hover,
.modal-close:hover {
  background: var(--color-bg-base);
  color: var(--color-text-strong);
}

.a11yos-modal-body {
  padding: var(--space-xl);
  overflow-y: auto;
  flex: 1;
}

.a11yos-modal-footer {
  padding: var(--space-xl);
  border-top: 1.5px solid var(--color-border-subtle);
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
}

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

.admin-layout {
  display: flex;
  min-height: 100vh;
  background: var(--color-bg-base);
}

.sidebar {
  width: 240px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  flex-direction: column;
  border-right: 1.5px solid var(--color-border-subtle);
}

.sidebar-header {
  padding: var(--space-xl);
  border-bottom: 1.5px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
  color: var(--color-text-inverse);
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-h3);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.sidebar-header img {
  height: 32px;
  width: auto;
}

.sidebar-header p {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin: 0;
  opacity: 0.8;
}

.nav-menu {
  list-style: none;
  padding: var(--space-md) 0;
  margin: 0;
}

.nav-menu li {
  margin: 0;
}

.nav-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  color: var(--color-text-inverse);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  opacity: 0.9;
}

.nav-menu a:hover {
  background: rgba(255, 255, 255, 0.1);
  opacity: 1;
  text-decoration: none;
}

.nav-menu a.active,
.nav-menu a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.15);
  border-left-color: var(--color-accent-green);
  opacity: 1;
  font-weight: var(--font-weight-semibold);
}

.nav-menu a:focus-visible {
  outline: 3px solid var(--color-accent-green);
  outline-offset: -3px;
  background: rgba(255, 255, 255, 0.1);
}

.main-content {
  flex: 1;
  padding: var(--space-3xl);
  overflow-y: auto;
}

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

.content-header h1 {
  margin: 0;
}

/* ============================================
   LISTS
   ============================================ */

.section-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.section-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  border: 1.5px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  transition: all var(--transition-fast);
}

.section-item:hover {
  border-color: var(--color-border-medium);
  background: var(--color-bg-elevated);
}

.section-info h3 {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
}

.section-info p {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.section-meta {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.section-actions {
  display: flex;
  gap: var(--space-sm);
}

/* ============================================
   TABS
   ============================================ */

.tab-buttons {
  display: flex;
  gap: var(--space-xs);
  border-bottom: 1.5px solid var(--color-border-subtle);
  background: var(--color-bg-base);
  margin: calc(var(--space-xl) * -1);
  margin-bottom: 0;
  padding: 0 var(--space-xl);
}

.tab-button {
  padding: var(--space-md) var(--space-lg);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  position: relative;
  top: 1.5px;
  min-height: 44px;
}

.tab-button:hover {
  color: var(--color-text-medium);
  background: rgba(0, 0, 0, 0.02);
}

.tab-button.active {
  color: var(--color-accent-green);
  border-bottom-color: var(--color-accent-green);
  background: var(--color-bg-subtle);
}

.tab-button:focus-visible {
  outline: var(--focus-outline);
  outline-offset: -2px;
}

.content-tab {
  display: none;
  padding: var(--space-xl);
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */

.a11yos-sr-only,
.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;
}

/* Skip Links */
.skip-link,
.a11yos-skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  z-index: 100000;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus,
.a11yos-skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent-green);
  outline-offset: 2px;
}

/* Spacing Utilities */
.a11yos-mt-xs { margin-top: var(--space-xs); }
.a11yos-mt-sm { margin-top: var(--space-sm); }
.a11yos-mt-md { margin-top: var(--space-md); }
.a11yos-mt-lg { margin-top: var(--space-lg); }
.a11yos-mt-xl { margin-top: var(--space-xl); }

.a11yos-mb-xs { margin-bottom: var(--space-xs); }
.a11yos-mb-sm { margin-bottom: var(--space-sm); }
.a11yos-mb-md { margin-bottom: var(--space-md); }
.a11yos-mb-lg { margin-bottom: var(--space-lg); }
.a11yos-mb-xl { margin-bottom: var(--space-xl); }

/* Text Utilities */
.a11yos-text-center { text-align: center; }
.a11yos-text-left { text-align: left; }
.a11yos-text-right { text-align: right; }
.a11yos-text-strong { color: var(--color-text-strong); font-weight: var(--font-weight-semibold); }
.a11yos-text-muted { color: var(--color-text-muted); }
.a11yos-text-small { font-size: var(--font-size-small); }

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

*:focus-visible {
  outline: 3px solid var(--color-accent-green);
  outline-offset: 2px;
}

[role="status"],
[role="alert"],
[aria-live] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

[role="status"].visible,
[role="alert"].visible,
[aria-live].visible {
  position: static;
  width: auto;
  height: auto;
  margin: var(--space-md) 0;
  clip: auto;
  white-space: normal;
}

[disabled],
[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

[aria-busy="true"] {
  cursor: wait;
  opacity: 0.7;
}

/* ============================================
   MOBILE MENU (Marketing Pages)
   ============================================ */

/* Mobile Menu Toggle Button - Hidden by default on desktop */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-text-strong);
  font-size: 24px;
  line-height: 1;
  transition: color var(--transition-fast);
}

.mobile-menu-toggle:hover {
  color: var(--color-accent-green);
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-accent-green);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

@media (max-width: 768px) {
  :root {
    --font-size-h1: 24px;
    --font-size-h2: 20px;
    --font-size-h3: 16px;
  }

  .admin-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1.5px solid var(--color-border-subtle);
  }

  .main-content {
    padding: var(--space-lg);
  }

  .a11yos-modal,
  .modal-content {
    max-width: 95%;
  }

  .content-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  /* Mobile Navigation - Show toggle button on mobile */
  .mobile-menu-toggle {
    display: block;
  }

  /* Marketing navigation container needs position relative for dropdown */
  .marketing-nav-container {
    position: relative;
  }

  /* Marketing navigation - hide by default on mobile */
  .marketing-nav .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    margin-top: var(--space-md);
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-md);
    z-index: var(--z-dropdown);
  }

  /* Show nav menu when active class is added */
  .marketing-nav .nav-menu.active {
    display: flex;
  }

  /* Style nav links for mobile dropdown */
  .marketing-nav .nav-menu .nav-link-plain,
  .marketing-nav .nav-menu .a11yos-btn {
    width: 100%;
    text-align: center;
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    justify-content: center;
  }

  .marketing-nav .nav-menu .nav-link-plain {
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .marketing-nav .nav-menu .nav-link-plain:last-of-type {
    border-bottom: none;
  }

  .marketing-nav .nav-menu .a11yos-btn {
    margin-top: var(--space-sm);
  }
}

/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   HIGH CONTRAST MODE
   ============================================ */

@media (prefers-contrast: high) {
  :root {
    --color-border-subtle: rgba(0, 0, 0, 0.4);
    --color-border-medium: rgba(0, 0, 0, 0.6);
    --color-border-strong: rgba(0, 0, 0, 0.8);
  }

  .a11yos-btn,
  .btn,
  .a11yos-input,
  .a11yos-card,
  .card,
  input,
  textarea,
  select {
    border-width: 2px;
  }

  *:focus-visible {
    outline-width: 4px;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .sidebar,
  .btn,
  .a11yos-btn,
  .modal,
  .a11yos-modal-backdrop {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  a[href]:after {
    content: " (" attr(href) ")";
  }
}

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

.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-bg-base);
}

.login-container {
  width: 100%;
  max-width: 420px;
  padding: var(--space-xl);
}

.login-box {
  background: var(--color-bg-subtle);
  border: 1.5px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
  box-shadow: var(--shadow-lg);
}

.btn-block {
  width: 100%;
}

.error-message {
  padding: var(--space-md);
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1.5px solid var(--color-danger-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-size: 16px;
}

.success-message {
  padding: var(--space-md);
  background: #d4edda;
  color: #155724;
  border: 1.5px solid #c3e6cb;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-size: 16px;
}

.login-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1.5px solid var(--color-border-subtle);
  text-align: center;
}

.login-footer p {
  font-size: 16px;
  color: var(--color-text-muted);
  margin: 0;
}