/* ===================================
   CSS Custom Properties (Variables)
   =================================== */
:root {
  /* Colors - WCAG AA compliant */
  --color-primary: #003366;
  --color-primary-light: #0055aa;
  --color-background: #ffffff;
  --color-surface: #f5f5f5;
  --color-text: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-border: #d0d0d0;
  --color-border-light: #e8e8e8;
  
  /* Playoff indicators - WCAG AA compliant */
  --color-division-leader: #1a5f1a;
  --color-division-leader-bg: #e8f5e8;
  --color-wild-card: #8b4513;
  --color-wild-card-bg: #fff4e6;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  
  /* Layout */
  --max-width: 1340px;
  --border-radius: 0.5rem;
}

/* ===================================
   Reset and Base Styles
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-surface);
  line-height: 1.6;
  min-width: 320px;
}

/* ===================================
   Typography
   =================================== */
h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  border-bottom: 3px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
}

h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

/* ===================================
   Layout - Mobile First
   =================================== */

/* Skip to main content link for keyboard navigation */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background-color: var(--color-primary);
  color: var(--color-background);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  font-weight: 600;
  z-index: 100;
  border-radius: 0 0 var(--border-radius) 0;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-background);
  outline-offset: -3px;
}

header {
  background-color: var(--color-primary);
  color: var(--color-background);
  padding: var(--spacing-lg) var(--spacing-md);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

header h1 {
  color: var(--color-background);
}

.last-updated {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
  margin-top: var(--spacing-xs);
}

/* ===================================
   Warning Banner
   =================================== */
.warning-banner {
  background-color: #fff3cd;
  border: 2px solid #ffc107;
  color: #856404;
  padding: var(--spacing-md);
  margin: var(--spacing-md);
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: 500;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.warning-banner strong {
  font-weight: 700;
}

.legend {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  margin: 0 auto;
  max-width: 280px;
}

.legend-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  text-align: center;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-xs);
}

.legend-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs);
  border-radius: 0.375rem;
  transition: background-color 0.2s ease;
}

.legend-item:hover {
  background-color: rgba(0, 51, 102, 0.05);
}

.legend-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  flex: 1;
}

.legend-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  min-height: 2rem;
  font-weight: 700;
  border-radius: 0.375rem;
  flex-shrink: 0;
}

.legend-icon-star {
  background-color: var(--color-division-leader-bg);
  color: var(--color-division-leader);
  font-size: 1.1rem;
  border: 2px solid var(--color-division-leader);
}

.legend-icon-wc {
  background-color: var(--color-wild-card);
  color: var(--color-background);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 0.4rem;
}

main {
  padding: var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

footer {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border-light);
}

/* ===================================
   Playoff Calculator Control
   =================================== */
.playoff-calculator-control {
  background-color: var(--color-background);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin: 0 auto var(--spacing-lg);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  max-width: var(--max-width);
}

.calculator-toggle {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 0.5rem;
  appearance: none;
  -webkit-appearance: none;
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.calculator-toggle:hover,
.calculator-toggle:focus-visible {
  border-color: var(--color-primary);
  background-color: var(--color-background-alt);
  box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
  outline: none;
}

.calculator-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.toggle-icon {
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  transition: transform 0.2s ease;
}

.calculator-toggle[aria-expanded="true"] .toggle-icon {
  transform: rotate(180deg);
}

.calculator-content {
  margin-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--spacing-md);
}

.calculator-input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.calculator-input-group label {
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.input-wrapper {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  flex-wrap: wrap;
}

.playoff-calculator-control input[type="number"] {
  width: 140px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  border: 2px solid var(--color-border);
  border-radius: 0.375rem;
  background-color: var(--color-background);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.playoff-calculator-control input[type="number"]:hover {
  border-color: var(--color-primary-light);
}

.playoff-calculator-control input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

.playoff-calculator-control input[type="number"]:invalid,
.playoff-calculator-control input[type="number"][aria-invalid="true"] {
  border-color: #dc3545;
}

.playoff-calculator-control input[type="number"]::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.6;
}

/* Remove spinner arrows on number input for cleaner look */
.playoff-calculator-control input[type="number"]::-webkit-inner-spin-button,
.playoff-calculator-control input[type="number"]::-webkit-outer-spin-button {
  opacity: 1;
}

.clear-button {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-family: var(--font-family);
  color: var(--color-text-secondary);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.clear-button:hover {
  background-color: var(--color-border);
  border-color: var(--color-text-secondary);
  color: var(--color-text);
}

.clear-button:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.helper-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  display: block;
}

.error-message {
  font-size: var(--font-size-sm);
  color: #dc3545;
  font-weight: 500;
  display: block;
  padding: var(--spacing-xs) 0;
}

/* ===================================
   Status Badges (Playoff Calculator)
   =================================== */
.status-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  line-height: 1.2;
  white-space: nowrap;
}

.status-clinched {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.status-eliminated {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* ===================================
   Required Percentage Color Coding
   =================================== */

/* Achievable: 0-50% - Team needs to play at or below current pace */
.achievable {
  color: #28a745;
  font-weight: 600;
}

/* Moderate: 50-60% - Team needs to improve slightly */
.moderate {
  color: #ffc107;
  font-weight: 600;
}

/* Difficult: 60-75% - Team needs significant improvement */
.difficult {
  color: #fd7e14;
  font-weight: 600;
}

/* Very Difficult: 75%+ - Team needs to win almost all remaining games */
.very-difficult {
  color: #dc3545;
  font-weight: 700;
}

/* ===================================
   Playoff Calculator Column Transitions
   =================================== */

/* Smooth transitions for calculator column appearance/disappearance */
.standings-table {
  transition: width 0.25s ease-in-out;
}

/* Column header transitions */
.standings-table th.req-pts-col {
  opacity: 0;
  max-width: 0;
  padding-left: 0;
  padding-right: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: opacity 0.25s ease-in-out, 
              max-width 0.25s ease-in-out,
              padding 0.25s ease-in-out;
}

.standings-table th.req-pts-col.visible {
  opacity: 1;
  max-width: 120px;
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
}

/* Column cell transitions */
.standings-table td.req-pts-cell {
  opacity: 0;
  max-width: 0;
  padding-left: 0;
  padding-right: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: opacity 0.25s ease-in-out,
              max-width 0.25s ease-in-out,
              padding 0.25s ease-in-out;
}

.standings-table td.req-pts-cell.visible {
  opacity: 1;
  max-width: 120px;
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
}

/* Tablet and desktop - larger max-width */
@media (min-width: 768px) {
  .standings-table th.req-pts-col.visible {
    max-width: 150px;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
  
  .standings-table td.req-pts-cell.visible {
    max-width: 150px;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

/* ===================================
   Conference Sections
   =================================== */
.conference {
  margin-bottom: var(--spacing-xl);
  background-color: var(--color-background);
  padding: var(--spacing-lg) var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* ===================================
   Division and Wild Card Sections
   =================================== */
.division,
.wild-card {
  margin-bottom: var(--spacing-lg);
}

.wild-card {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--color-border);
}

.standings-table-wrapper {
  width: 100%;
  overflow-x: auto;
  background-color: var(--color-background);
  border-radius: var(--border-radius);
  box-shadow: inset 0 0 0 1px var(--color-border-light);
  padding-bottom: var(--spacing-xs);
}

.standings-table-wrapper::-webkit-scrollbar {
  height: 6px;
}

.standings-table-wrapper::-webkit-scrollbar-track {
  background-color: transparent;
}

.standings-table-wrapper::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 4px;
}

/* ===================================
   Tables - Mobile First
   =================================== */
.standings-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-background);
  font-size: var(--font-size-sm);
  min-width: 520px;
}

.standings-table thead {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

.standings-table th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.standings-table th:first-child {
  text-align: left;
  min-width: 120px;
}

.standings-table th:not(:first-child) {
  text-align: center;
}

.standings-table tbody tr {
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color 0.2s ease;
}

.standings-table tbody tr:hover {
  background-color: var(--color-surface);
}

.standings-table td {
  padding: var(--spacing-sm);
  text-align: left;
}

.standings-table td:first-child {
  font-weight: 500;
  position: relative;
  padding-left: var(--spacing-md);
}

.standings-table td:not(:first-child) {
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Screen reader only content */
.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;
}

/* ===================================
   Keyboard Navigation and Focus Styles
   =================================== */

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Table row focus for keyboard navigation */
.standings-table tbody tr:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  background-color: var(--color-surface);
}

/* Remove default focus outline for mouse users */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
[tabindex]:focus:not(:focus-visible) {
  outline: none;
}

/* Ensure abbr elements have proper styling */
abbr {
  text-decoration: none;
  cursor: help;
  border-bottom: 1px dotted var(--color-text-secondary);
}

abbr:hover,
abbr:focus {
  border-bottom-style: solid;
  border-bottom-color: var(--color-primary);
}

/* ===================================
   Playoff Position Indicators
   =================================== */

/* Division Leader Badge */
.standings-table tbody tr.division-leader td:first-child::before {
  content: "★";
  display: inline-block;
  margin-right: var(--spacing-xs);
  color: var(--color-division-leader);
  font-weight: 700;
  font-size: 1.1em;
}

.standings-table tbody tr.division-leader {
  background-color: var(--color-division-leader-bg);
  border-left: 4px solid var(--color-division-leader);
}

.standings-table tbody tr.division-leader:hover {
  background-color: #d4ead4;
}

/* Wild Card Badge */
.standings-table tbody tr.wild-card td:first-child::before {
  content: "WC";
  display: inline-block;
  margin-right: var(--spacing-xs);
  color: var(--color-wild-card);
  font-weight: 700;
  font-size: 0.75em;
  padding: 0.125rem 0.25rem;
  background-color: var(--color-wild-card);
  color: var(--color-background);
  border-radius: 0.25rem;
  vertical-align: middle;
}

.standings-table tbody tr.wild-card {
  background-color: var(--color-wild-card-bg);
  border-left: 4px solid var(--color-wild-card);
}

.standings-table tbody tr.wild-card:hover {
  background-color: #ffe8cc;
}

/* ===================================
   Responsive Design - Mobile (max-width: 767px)
   =================================== */
@media (max-width: 767px) {
  /* Playoff Calculator - Full width on mobile */
  .playoff-calculator-control {
    margin: var(--spacing-md);
    padding: var(--spacing-md);
  }
  
  .playoff-calculator-control input[type="number"] {
    width: 100%;
    max-width: 200px;
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 44px; /* Touch-friendly size */
  }
  
  .clear-button {
    min-height: 44px; /* Touch-friendly size */
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  .input-wrapper {
    width: 100%;
  }
  
  /* Table adjustments for calculator column */
  .standings-table {
    font-size: 0.75rem;
  }
  
  .standings-table th,
  .standings-table td {
    padding: var(--spacing-xs) 0.25rem;
  }
  
  .standings-table th:first-child,
  .standings-table td:first-child {
    min-width: 100px;
    padding-left: var(--spacing-sm);
  }
  
  /* Hide less critical columns when calculator is active */
  .standings-table.calculator-active th:nth-child(2),
  .standings-table.calculator-active td:nth-child(2) {
    display: none; /* Hide GP (Games Played) */
  }
  
  .standings-table.calculator-active th:nth-child(3),
  .standings-table.calculator-active td:nth-child(3) {
    display: none; /* Hide W (Wins) */
  }
  
  .standings-table.calculator-active th:nth-child(4),
  .standings-table.calculator-active td:nth-child(4) {
    display: none; /* Hide L (Losses) */
  }
  
  .standings-table.calculator-active th:nth-child(5),
  .standings-table.calculator-active td:nth-child(5) {
    display: none; /* Hide OTL (Overtime Losses) */
  }
  
  /* Ensure calculator column remains visible and readable */
  .standings-table th:last-child,
  .standings-table td:last-child {
    min-width: 70px;
    font-size: 0.75rem;
  }
  
  /* Status badges - smaller on mobile */
  .status-badge {
    font-size: 0.65rem;
    padding: 0.2rem 0.4rem;
  }
  
  /* Percentage values - ensure readability */
  .standings-table td.achievable,
  .standings-table td.moderate,
  .standings-table td.difficult,
  .standings-table td.very-difficult {
    font-size: 0.75rem;
    font-weight: 700;
  }
  
  /* Touch-friendly hover states (disable on mobile) */
  .standings-table tbody tr:hover {
    background-color: transparent;
  }
  
  .standings-table tbody tr.division-leader:hover {
    background-color: var(--color-division-leader-bg);
  }
  
  .standings-table tbody tr.wild-card:hover {
    background-color: var(--color-wild-card-bg);
  }
}

/* ===================================
   Responsive Design - Tablet (768px+)
   =================================== */
@media (min-width: 768px) {
  header {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
  
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
  
  .header-main {
    text-align: left;
    flex: 1;
  }
  
  .legend {
    margin: 0;
    min-width: 240px;
  }
  
  .playoff-calculator-control {
    margin: var(--spacing-xl) var(--spacing-lg);
    padding: var(--spacing-xl);
  }
  
  .calculator-input-group {
    flex-direction: row;
    align-items: flex-start;
    flex-wrap: wrap;
  }
  
  .calculator-input-group label {
    min-width: 280px;
    padding-top: var(--spacing-xs);
  }
  
  .input-wrapper {
    flex: 1;
    min-width: 200px;
  }
  
  .helper-text {
    flex-basis: 100%;
    margin-left: 280px;
  }
  
  .error-message {
    flex-basis: 100%;
    margin-left: 280px;
  }
  
  main {
    padding: var(--spacing-lg);
  }
  
  .conference {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
  
  .standings-table {
    font-size: var(--font-size-base);
    display: table;
  }
  
  .standings-table th,
  .standings-table td {
    padding: var(--spacing-md);
  }
}

/* ===================================
   Responsive Design - Desktop (1024px+)
   =================================== */
@media (min-width: 1024px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  /* CSS Grid Layout for Divisions */
  .conference {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(520px, 1fr));
    gap: var(--spacing-xl);
  }
  
  .conference > h2 {
    grid-column: 1 / -1;
  }
  
  .conference .wild-card {
    grid-column: 1 / -1;
    border-top: 2px solid var(--color-border);
    padding-top: var(--spacing-lg);
  }
  
  .standings-table th:first-child {
    min-width: 180px;
  }
}

/* ===================================
   Print Styles
   =================================== */
@media print {
  body {
    background-color: white;
  }
  
  .conference {
    box-shadow: none;
    page-break-inside: avoid;
  }
  
  .standings-table tbody tr:hover {
    background-color: transparent;
  }
}