/* ==========================================================================
   Lodge Management System - Brand Standards CSS
   Based on BRAND_ACCESSIBILITY_GUIDELINES.md
   WCAG 2.1 AA/AAA Compliant
   ========================================================================== */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  /* Primary - Deep Navy Blue */
  --color-primary-900: #1a2744;
  --color-primary-800: #1e3a5f;
  --color-primary-700: #234b7a;  /* Primary brand color */
  --color-primary-600: #2d5f99;
  --color-primary-500: #3973b3;
  --color-primary-400: #5c91c7;
  --color-primary-300: #8ab4db;
  --color-primary-200: #b8d4ec;
  --color-primary-100: #e1eef8;
  --color-primary-50:  #f0f7fc;

  /* Secondary - Warm Gold */
  --color-secondary-700: #996515;
  --color-secondary-600: #b8860b;  /* Primary gold */
  --color-secondary-500: #d4a017;
  --color-secondary-400: #e8b923;
  --color-secondary-300: #f0cb4a;
  --color-secondary-200: #f5dc8a;
  --color-secondary-100: #faf0c8;
  --color-secondary-50:  #fdf8e8;

  /* Neutrals - Warm Gray */
  --color-neutral-900: #1a1a1a;
  --color-neutral-800: #2d2d2d;
  --color-neutral-700: #404040;
  --color-neutral-600: #525252;
  --color-neutral-500: #6b6b6b;
  --color-neutral-400: #8a8a8a;
  --color-neutral-300: #b0b0b0;
  --color-neutral-200: #d4d4d4;
  --color-neutral-100: #ededed;
  --color-neutral-50:  #f7f7f7;
  --color-neutral-0:   #ffffff;

  /* Semantic Colors */
  --color-success-700: #166534;
  --color-success-600: #16a34a;
  --color-success-500: #22c55e;
  --color-success-100: #dcfce7;

  --color-warning-700: #b45309;
  --color-warning-600: #d97706;
  --color-warning-500: #f59e0b;
  --color-warning-100: #fef3c7;

  --color-error-700: #b91c1c;
  --color-error-600: #dc2626;
  --color-error-500: #ef4444;
  --color-error-100: #fee2e2;

  --color-info-700: #1d4ed8;
  --color-info-600: #2563eb;
  --color-info-500: #3b82f6;
  --color-info-100: #dbeafe;

  /* Typography - System Fonts */
  --font-family-sans:
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    'Helvetica Neue',
    Arial,
    sans-serif,
    'Apple Color Emoji',
    'Segoe UI Emoji';

  --font-family-serif:
    Georgia,
    Cambria,
    'Times New Roman',
    Times,
    serif;

  --font-family-mono:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    monospace;

  /* Type Scale (1.25 ratio) */
  --text-base: 1rem;         /* 16px */
  --text-lg: 1.125rem;       /* 18px */
  --text-xl: 1.25rem;        /* 20px */
  --text-2xl: 1.5rem;        /* 24px */
  --text-3xl: 1.875rem;      /* 30px */
  --text-4xl: 2.25rem;       /* 36px */
  --text-5xl: 3rem;          /* 48px */
  --text-sm: 0.875rem;       /* 14px */
  --text-xs: 0.75rem;        /* 12px */

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;

  /* Semantic Aliases */
  --color-primary: var(--color-primary-700);
  --color-primary-hover: var(--color-primary-800);
  --color-primary-light: var(--color-primary-100);
  --color-text: var(--color-neutral-900);
  --color-text-secondary: var(--color-neutral-600);
  --color-text-muted: var(--color-neutral-500);
  --color-background: var(--color-neutral-0);
  --color-background-alt: var(--color-neutral-50);
  --color-border: var(--color-neutral-200);
  --color-border-strong: var(--color-neutral-300);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%; /* 16px base */
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Accessibility - Skip Link
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: var(--space-md);
  background: var(--color-primary-700);
  color: var(--color-neutral-0);
  text-decoration: none;
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* ==========================================================================
   Focus States (WCAG 2.4.7)
   ========================================================================== */

:focus-visible {
  outline: 3px solid var(--color-primary-500);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--space-sm);
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--color-neutral-900);
}

h1 {
  font-size: var(--text-4xl);
  letter-spacing: -0.025em;
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
}

h4 {
  font-size: var(--text-xl);
  font-weight: 600;
}

h5 {
  font-size: var(--text-lg);
  font-weight: 600;
}

h6 {
  font-size: var(--text-base);
  font-weight: 600;
}

p {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

.prose {
  max-width: 65ch;
}

a {
  color: var(--color-primary-700);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-800);
}

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

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

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

.text-lg {
  font-size: var(--text-lg);
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background-color: var(--color-background-alt);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

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

.grid-3 {
  grid-template-columns: repeat(1, 1fr);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  background-color: var(--color-primary-700);
  color: var(--color-neutral-0);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-neutral-0);
  text-decoration: none;
  font-size: var(--text-xl);
  font-weight: 700;
}

.logo:hover {
  color: var(--color-neutral-0);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-secondary-600);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.nav {
  display: none;
}

@media (min-width: 768px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
  }
}

.nav-link {
  color: var(--color-primary-100);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-neutral-0);
  background-color: var(--color-primary-800);
}

.nav-link.active {
  color: var(--color-neutral-0);
  background-color: var(--color-primary-800);
}

.mobile-menu-btn {
  display: flex;
  padding: var(--space-sm);
  background: none;
  border: none;
  color: var(--color-neutral-0);
  cursor: pointer;
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, var(--color-primary-800), var(--color-primary-600));
  color: var(--color-neutral-0);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.hero h1 {
  color: var(--color-neutral-0);
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: var(--text-lg);
  color: var(--color-primary-100);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  min-height: 48px;
  min-width: 120px;
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 2px var(--color-neutral-0),
    0 0 0 4px var(--color-primary-500);
}

.btn-primary {
  background-color: var(--color-primary-700);
  color: var(--color-neutral-0);
}

.btn-primary:hover {
  background-color: var(--color-primary-800);
  color: var(--color-neutral-0);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-neutral-300);
  color: var(--color-neutral-900);
}

.btn-secondary:hover {
  background-color: var(--color-neutral-100);
  border-color: var(--color-neutral-400);
  color: var(--color-neutral-900);
}

.btn-outline-white {
  background-color: transparent;
  border-color: var(--color-neutral-0);
  color: var(--color-neutral-0);
}

.btn-outline-white:hover {
  background-color: var(--color-neutral-0);
  color: var(--color-primary-700);
}

.btn-gold {
  background-color: var(--color-secondary-600);
  color: var(--color-neutral-0);
}

.btn-gold:hover {
  background-color: var(--color-secondary-700);
  color: var(--color-neutral-0);
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  min-height: 40px;
  min-width: 80px;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 1rem 2rem;
  min-height: 56px;
  font-size: var(--text-lg);
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background-color: var(--color-neutral-0);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0 0 var(--space-sm);
  color: var(--color-neutral-900);
}

.card-description {
  font-size: var(--text-base);
  color: var(--color-neutral-600);
  margin: 0;
}

.card-interactive {
  cursor: pointer;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card-interactive:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-interactive:focus-within {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.card-featured {
  border-color: var(--color-secondary-600);
  border-width: 2px;
}

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

.card-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-primary-100);
  color: var(--color-primary-700);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

/* ==========================================================================
   Forms
   ========================================================================== */

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

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-neutral-900);
}

.form-required {
  color: var(--color-error-600);
}

.form-input {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  min-height: 48px;
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  background-color: var(--color-neutral-0);
  border: 2px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:hover {
  border-color: var(--color-neutral-400);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

.form-input[aria-invalid="true"] {
  border-color: var(--color-error-600);
}

.form-input[aria-invalid="true"]:focus {
  box-shadow: 0 0 0 3px var(--color-error-100);
}

.form-hint {
  margin-top: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
}

.form-error {
  margin-top: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--color-error-700);
}

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

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23525252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 20px;
  padding-right: 2.5rem;
}

/* Checkbox and Radio */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.form-check-input {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--color-primary-700);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--text-base);
  color: var(--color-neutral-900);
  cursor: pointer;
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.table th,
.table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-neutral-200);
}

.table th {
  font-weight: 600;
  color: var(--color-neutral-700);
  background-color: var(--color-neutral-50);
}

.table tbody tr:hover {
  background-color: var(--color-neutral-50);
}

/* ==========================================================================
   Alerts / Messages
   ========================================================================== */

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

.alert-success {
  background-color: var(--color-success-100);
  color: var(--color-success-700);
  border-left: 4px solid var(--color-success-600);
}

.alert-warning {
  background-color: var(--color-warning-100);
  color: var(--color-warning-700);
  border-left: 4px solid var(--color-warning-600);
}

.alert-error {
  background-color: var(--color-error-100);
  color: var(--color-error-700);
  border-left: 4px solid var(--color-error-600);
}

.alert-info {
  background-color: var(--color-info-100);
  color: var(--color-info-700);
  border-left: 4px solid var(--color-info-600);
}

/* ==========================================================================
   Color Swatches (Demo Only)
   ========================================================================== */

.color-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-sm);
}

.color-swatch {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-end;
  padding: var(--space-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.color-swatch.light-text {
  color: var(--color-neutral-0);
}

.color-swatch.dark-text {
  color: var(--color-neutral-900);
}

/* ==========================================================================
   Badge
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
}

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

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

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

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background-color: var(--color-neutral-900);
  color: var(--color-neutral-300);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer h3 {
  color: var(--color-neutral-0);
  margin-bottom: var(--space-md);
  font-size: var(--text-lg);
}

.footer a {
  color: var(--color-neutral-300);
  text-decoration: none;
}

.footer a:hover {
  color: var(--color-neutral-0);
}

.footer-bottom {
  border-top: 1px solid var(--color-neutral-700);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: var(--text-sm);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

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

.text-gold {
  color: var(--color-secondary-600);
}

.mb-0 { margin-bottom: 0; }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* ==========================================================================
   Accessibility Preferences
   ========================================================================== */

/* 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 (forced-colors: active) {
  .btn-primary {
    border: 2px solid currentColor;
  }

  .card {
    border: 2px solid currentColor;
  }

  .form-input {
    border: 2px solid currentColor;
  }
}

/* Large text mode */
[data-text-size="large"] {
  --text-base: 1.25rem;
  --text-sm: 1rem;
  --text-lg: 1.5rem;
  --text-xl: 1.75rem;
  --text-2xl: 2rem;
}

/* High contrast theme */
[data-contrast="high"] {
  --color-primary-700: #000080;
  --color-neutral-900: #000000;
  --color-neutral-0: #ffffff;
  --color-neutral-600: #333333;
}