/* =============================================================================
   GLOBAL STYLES - The Hop Charity Darts League
   =============================================================================
   
   Structure:
   1. CSS Variables (Colors, Spacing, Fonts)
   2. Reset & Base Styles
   3. Typography
   4. Layout Components (Header, Footer, Navigation)
   5. UI Components (Buttons, Cards, Forms, Tables)
   6. Utility Classes
   7. Loading Spinners
   8. Toast Notifications
   9. Dark Mode Overrides
   10. Responsive Breakpoints
   
   ============================================================================= */

/* =============================================================================
   1. CSS VARIABLES
   ============================================================================= */

:root {
  /* Brand Colors */
  --color-primary: #1a4d4d;        /* Teal */
  --color-accent: #f4c430;         /* Gold */
  --color-black: #000000;
  --color-white: #ffffff;
  --color-light-grey: #f5f5f5;
  --color-dark-grey: #333333;
  
  /* Semantic Colors - Light Mode */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #e8e8e8;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-inverse: #ffffff;
  --border-color: #dddddd;
  
  /* Status Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;
  
  /* Highlight Colors (for standings) */
  --highlight-green: #22c55e;
  --highlight-bronze: #cd7f32;
  --highlight-yellow: #fbbf24;
  --highlight-red: #ef4444;
  --highlight-grey: #9ca3af;
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Z-index Layers */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-modal: 1030;
  --z-toast: 1040;
  --z-tooltip: 1050;
  
  /* Fonts */
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #242424;
  --bg-tertiary: #2e2e2e;
  --text-primary: #e5e5e5;
  --text-secondary: #a3a3a3;
  --text-inverse: #1a1a1a;
  --border-color: #404040;
  
  /* Adjust primary color for dark mode visibility */
  --color-primary: #2d7a7a;
}

/* =============================================================================
   2. RESET & BASE STYLES
   ============================================================================= */

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* =============================================================================
   3. TYPOGRAPHY
   ============================================================================= */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

strong {
  font-weight: 600;
}

/* =============================================================================
   4. LAYOUT COMPONENTS
   ============================================================================= */

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

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* Header */
.header {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-inverse);
  cursor: pointer;
}

.logo img {
  height: 40px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-link {
  color: var(--text-inverse);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-accent);
}

.nav-link.active {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-accent);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-inverse);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-sm);
}

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

.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.user-menu-trigger:hover {
  background: rgba(255, 255, 255, 0.2);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--color-accent);
}

.user-menu-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  display: none;
  z-index: var(--z-dropdown);
}

.user-menu-dropdown.open {
  display: block;
}

.user-menu-item {
  display: block;
  padding: var(--spacing-md);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-fast);
}

.user-menu-item:last-child {
  border-bottom: none;
}

.user-menu-item:hover {
  background-color: var(--bg-secondary);
}

/* Dark Mode Toggle */
.theme-toggle {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--text-inverse);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.25rem;
  transition: background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Footer */
.footer {
  background-color: var(--color-dark-grey);
  color: var(--text-inverse);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
}

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

.footer-section h4 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-sm);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

/* =============================================================================
   5. UI COMPONENTS
   ============================================================================= */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  min-height: 44px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

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

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-black);
}

.btn-primary:hover:not(:disabled) {
  background-color: #d4a827;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: #2d7a7a;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

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

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
}

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

.btn-small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
  min-height: 36px;
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

/* Cards */
.card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

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

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.card-body {
  margin-bottom: var(--spacing-md);
}

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

/* Forms */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

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

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: 44px;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 77, 77, 0.1);
}

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

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

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

.form-error {
  display: block;
  color: var(--color-danger);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.form-help {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.form-checkbox input,
.form-radio input {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-primary);
}

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

.table th {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 10;
}

.table tbody tr:hover {
  background-color: var(--bg-secondary);
}

.table tbody tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

.table tbody tr:nth-child(odd) {
  background-color: var(--bg-primary);
}

/* Table highlighting for standings */
.table tbody tr.highlight-green {
  background-color: rgba(34, 197, 94, 0.1) !important;
}

.table tbody tr.highlight-bronze {
  background-color: rgba(205, 127, 50, 0.1) !important;
}

.table tbody tr.highlight-yellow {
  background-color: rgba(251, 191, 36, 0.1) !important;
}

.table tbody tr.highlight-red {
  background-color: rgba(239, 68, 68, 0.1) !important;
}

.table tbody tr.highlight-grey {
  background-color: rgba(156, 163, 175, 0.1) !important;
}

/* Text center alignment for table cells */
.text-center {
  text-align: center !important;
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

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

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

.badge-info {
  background-color: var(--color-info);
  color: var(--text-inverse);
}

.badge-grey {
  background-color: var(--highlight-grey);
  color: var(--text-inverse);
}

/* =============================================================================
   6. UTILITY CLASSES
   ============================================================================= */

.mt-0 { margin-top: 0 !important; }
.mt-sm { margin-top: var(--spacing-sm) !important; }
.mt-md { margin-top: var(--spacing-md) !important; }
.mt-lg { margin-top: var(--spacing-lg) !important; }
.mt-xl { margin-top: var(--spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-sm { margin-bottom: var(--spacing-sm) !important; }
.mb-md { margin-bottom: var(--spacing-md) !important; }
.mb-lg { margin-bottom: var(--spacing-lg) !important; }
.mb-xl { margin-bottom: var(--spacing-xl) !important; }

.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-success { color: var(--color-success) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-danger { color: var(--color-danger) !important; }

.bg-primary { background-color: var(--bg-primary) !important; }
.bg-secondary { background-color: var(--bg-secondary) !important; }

.hidden { display: none !important; }
.flex { display: flex !important; }
.flex-column { flex-direction: column !important; }
.justify-between { justify-content: space-between !important; }
.justify-center { justify-content: center !important; }
.align-center { align-items: center !important; }
.gap-sm { gap: var(--spacing-sm) !important; }
.gap-md { gap: var(--spacing-md) !important; }
.gap-lg { gap: var(--spacing-lg) !important; }

/* =============================================================================
   7. LOADING SPINNERS
   ============================================================================= */

/* Spinning Circle Loader */
.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

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

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

/* Pulsing Dots Loader */
.dots-loader {
  display: inline-flex;
  gap: var(--spacing-sm);
}

.dots-loader span {
  width: 12px;
  height: 12px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: pulse 1.4s infinite ease-in-out both;
}

.dots-loader span:nth-child(1) {
  animation-delay: -0.32s;
}

.dots-loader span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes pulse {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  40% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

/* Inline Button Spinner */
.btn .spinner-small {
  margin-right: var(--spacing-sm);
}

/* Full-page Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.loading-overlay.hidden {
  display: none;
}

/* =============================================================================
   8. TOAST NOTIFICATIONS
   ============================================================================= */

.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
}

.toast {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--color-info);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-left-color: var(--color-success);
}

.toast.warning {
  border-left-color: var(--color-warning);
}

.toast.error {
  border-left-color: var(--color-danger);
}

.toast-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.toast-message {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0;
  flex-shrink: 0;
}

.toast-close:hover {
  color: var(--text-primary);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* =============================================================================
   9. DARK MODE OVERRIDES
   ============================================================================= */

[data-theme="dark"] .card {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus {
  box-shadow: 0 0 0 3px rgba(45, 122, 122, 0.2);
}

[data-theme="dark"] .spinner {
  border-color: var(--border-color);
  border-top-color: var(--color-primary);
}

/* =============================================================================
   10. RESPONSIVE BREAKPOINTS
   ============================================================================= */

/* Tablet and below */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
  
  .header-content {
    flex-wrap: wrap;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav {
    flex-direction: column;
    width: 100%;
    display: none;
  }
  
  .nav.open {
    display: flex;
  }
  
  .nav-links {
    flex-direction: column;
    width: 100%;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
    max-width: none;
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .table-container {
    font-size: 0.875rem;
  }
  
  .table th,
  .table td {
    padding: var(--spacing-sm);
  }
}

/* Mobile */
@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  
  .btn {
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* Desktop large screens */
@media (min-width: 1400px) {
  .container-wide {
    max-width: 1600px;
  }
}