/**
 * RELTE Leaderboard Widget Styles
 * Uses BEM naming convention: relte-leaderboard__element--modifier
 */

/* ========================================
   CSS Custom Properties (Variables)
   ======================================== */

:root {
  /* Colors */
  --relte-color-primary: #c41e3a;
  --relte-color-secondary: #041e42;
  --relte-color-accent: #667eea;
  --relte-color-text: #2d3748;
  --relte-color-text-muted: #718096;
  --relte-color-bg: #ffffff;
  --relte-color-bg-alt: #f7fafc;
  --relte-color-border: #e2e8f0;
  --relte-color-hover: #edf2f7;
  --relte-color-success: #48bb78;
  --relte-color-error: #f56565;

  /* Typography */
  --relte-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --relte-font-size-xs: 12px;
  --relte-font-size-sm: 14px;
  --relte-font-size-base: 16px;
  --relte-font-size-lg: 18px;
  --relte-font-size-xl: 20px;
  --relte-font-size-2xl: 24px;
  --relte-font-size-3xl: 30px;

  /* Spacing */
  --relte-spacing-xs: 4px;
  --relte-spacing-sm: 8px;
  --relte-spacing-md: 12px;
  --relte-spacing-lg: 16px;
  --relte-spacing-xl: 20px;
  --relte-spacing-2xl: 24px;
  --relte-spacing-3xl: 32px;

  /* Borders */
  --relte-radius-sm: 4px;
  --relte-radius-md: 8px;
  --relte-radius-lg: 12px;
  --relte-radius-xl: 16px;
  --relte-border-width: 1px;

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

  /* Transitions */
  --relte-transition-fast: 150ms ease-in-out;
  --relte-transition-base: 250ms ease-in-out;
  --relte-transition-slow: 350ms ease-in-out;

  /* Layout */
  --relte-container-max-width: 900px;
  --relte-header-height: 80px;
}

/* ========================================
   Base Component
   ======================================== */

.relte-leaderboard {
  font-family: var(--relte-font-family);
  font-size: var(--relte-font-size-base);
  color: var(--relte-color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  box-sizing: border-box;
}

.relte-leaderboard *,
.relte-leaderboard *::before,
.relte-leaderboard *::after {
  box-sizing: inherit;
}

/* ========================================
   Container
   ======================================== */

.relte-leaderboard__container {
  max-width: var(--relte-container-max-width);
  margin: 0 auto;
  background: var(--relte-color-bg);
  border-radius: var(--relte-radius-xl);
  box-shadow: var(--relte-shadow-xl);
  overflow: hidden;
}

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

.relte-leaderboard__header {
  background: linear-gradient(135deg, var(--relte-color-primary) 0%, var(--relte-color-secondary) 100%);
  color: white;
  padding: var(--relte-spacing-3xl) var(--relte-spacing-2xl);
  text-align: center;
}

.relte-leaderboard__header-title {
  font-size: var(--relte-font-size-3xl);
  font-weight: 700;
  margin: 0 0 var(--relte-spacing-sm) 0;
  line-height: 1.2;
}

.relte-leaderboard__header-subtitle {
  font-size: var(--relte-font-size-lg);
  font-weight: 400;
  margin: 0;
  opacity: 0.9;
}

/* ========================================
   Filters
   ======================================== */

.relte-leaderboard__filters {
  padding: var(--relte-spacing-2xl);
  background: var(--relte-color-bg-alt);
  border-bottom: var(--relte-border-width) solid var(--relte-color-border);
  display: flex;
  gap: var(--relte-spacing-lg);
  flex-wrap: wrap;
  align-items: flex-end;
}

.relte-leaderboard__filter-group {
  flex: 1;
  min-width: 200px;
}

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

.relte-leaderboard__filter-select {
  width: 100%;
  padding: var(--relte-spacing-md) var(--relte-spacing-lg);
  font-size: var(--relte-font-size-base);
  font-family: var(--relte-font-family);
  color: var(--relte-color-text);
  background: var(--relte-color-bg);
  border: var(--relte-border-width) solid var(--relte-color-border);
  border-radius: var(--relte-radius-md);
  cursor: pointer;
  transition: all var(--relte-transition-fast);
}

.relte-leaderboard__filter-select:hover {
  border-color: var(--relte-color-primary);
}

.relte-leaderboard__filter-select:focus {
  outline: none;
  border-color: var(--relte-color-primary);
  box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

/* ========================================
   Leaderboard
   ======================================== */

.relte-leaderboard__content {
  padding: var(--relte-spacing-2xl);
}

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

.relte-leaderboard__item {
  display: flex;
  align-items: center;
  padding: var(--relte-spacing-lg);
  border-bottom: var(--relte-border-width) solid var(--relte-color-border);
  transition: background-color var(--relte-transition-fast);
}

.relte-leaderboard__item:last-child {
  border-bottom: none;
}

.relte-leaderboard__item:hover {
  background-color: var(--relte-color-hover);
}

.relte-leaderboard__rank {
  font-size: var(--relte-font-size-xl);
  font-weight: 700;
  color: var(--relte-color-text-muted);
  min-width: 50px;
  text-align: center;
}

.relte-leaderboard__rank--top {
  color: var(--relte-color-primary);
  font-size: var(--relte-font-size-2xl);
}

.relte-leaderboard__author {
  flex: 1;
  font-size: var(--relte-font-size-lg);
  font-weight: 600;
  color: var(--relte-color-text);
  cursor: pointer;
  transition: color var(--relte-transition-fast);
}

.relte-leaderboard__author:hover {
  color: var(--relte-color-primary);
  text-decoration: underline;
}

.relte-leaderboard__count {
  font-size: var(--relte-font-size-xl);
  font-weight: 700;
  color: var(--relte-color-primary);
  margin-left: var(--relte-spacing-lg);
}

.relte-leaderboard__count-label {
  font-size: var(--relte-font-size-sm);
  color: var(--relte-color-text-muted);
  margin-left: var(--relte-spacing-xs);
}

.relte-leaderboard__percentage {
  font-size: var(--relte-font-size-sm);
  color: var(--relte-color-text-muted);
  margin-left: var(--relte-spacing-sm);
}

/* ========================================
   View States
   ======================================== */

.relte-leaderboard__leaderboard-view {
  display: none;
}

.relte-leaderboard__leaderboard-view.show {
  display: block;
}

/* ========================================
   Author Letters View
   ======================================== */

.relte-leaderboard__author-view {
  display: none;
  animation: relte-fadeIn var(--relte-transition-base);
}

.relte-leaderboard__author-view.show {
  display: block;
}

.relte-leaderboard__author-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--relte-spacing-2xl);
  padding-bottom: var(--relte-spacing-lg);
  border-bottom: 2px solid var(--relte-color-border);
}

.relte-leaderboard__author-name {
  font-size: var(--relte-font-size-2xl);
  font-weight: 700;
  color: var(--relte-color-text);
  margin: 0;
}

.relte-leaderboard__back-button {
  padding: var(--relte-spacing-md) var(--relte-spacing-xl);
  font-size: var(--relte-font-size-base);
  font-family: var(--relte-font-family);
  font-weight: 600;
  color: var(--relte-color-primary);
  background: transparent;
  border: 2px solid var(--relte-color-primary);
  border-radius: var(--relte-radius-md);
  cursor: pointer;
  transition: all var(--relte-transition-fast);
}

.relte-leaderboard__back-button:hover {
  background: var(--relte-color-primary);
  color: white;
}

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

.relte-leaderboard__letter-item {
  padding: var(--relte-spacing-lg);
  border-bottom: var(--relte-border-width) solid var(--relte-color-border);
  transition: background-color var(--relte-transition-fast);
}

.relte-leaderboard__letter-item:last-child {
  border-bottom: none;
}

.relte-leaderboard__letter-item:hover {
  background-color: var(--relte-color-hover);
}

.relte-leaderboard__letter-title {
  font-size: var(--relte-font-size-lg);
  font-weight: 600;
  color: var(--relte-color-primary);
  text-decoration: none;
  display: block;
  margin-bottom: var(--relte-spacing-xs);
  transition: color var(--relte-transition-fast);
}

.relte-leaderboard__letter-title:hover {
  color: var(--relte-color-secondary);
  text-decoration: underline;
}

.relte-leaderboard__letter-date {
  font-size: var(--relte-font-size-sm);
  color: var(--relte-color-text-muted);
}

.relte-leaderboard__letter-municipality {
  font-size: var(--relte-font-size-sm);
  color: var(--relte-color-text-muted);
  margin-left: var(--relte-spacing-md);
}

/* ========================================
   Loading & Error States
   ======================================== */

.relte-leaderboard__loading {
  display: none;
  text-align: center;
  padding: var(--relte-spacing-3xl);
}

.relte-leaderboard__loading.show {
  display: block;
}

.relte-leaderboard__spinner {
  border: 4px solid var(--relte-color-border);
  border-top: 4px solid var(--relte-color-primary);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: relte-spin 1s linear infinite;
  margin: 0 auto var(--relte-spacing-lg);
}

.relte-leaderboard__loading-text {
  font-size: var(--relte-font-size-lg);
  color: var(--relte-color-text-muted);
}

.relte-leaderboard__error {
  display: none;
  padding: var(--relte-spacing-2xl);
  background: #fff5f5;
  border: var(--relte-border-width) solid var(--relte-color-error);
  border-radius: var(--relte-radius-md);
  color: var(--relte-color-error);
  text-align: center;
}

.relte-leaderboard__error.show {
  display: block;
}

.relte-leaderboard__empty {
  display: none;
  text-align: center;
  padding: var(--relte-spacing-3xl);
  color: var(--relte-color-text-muted);
}

.relte-leaderboard__empty.show {
  display: block;
}

/* ========================================
   Animations
   ======================================== */

@keyframes relte-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes relte-fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  .relte-leaderboard__container {
    border-radius: 0;
  }

  .relte-leaderboard__header {
    padding: var(--relte-spacing-2xl) var(--relte-spacing-lg);
  }

  .relte-leaderboard__header-title {
    font-size: var(--relte-font-size-2xl);
  }

  .relte-leaderboard__header-subtitle {
    font-size: var(--relte-font-size-base);
  }

  .relte-leaderboard__filters {
    flex-direction: column;
    padding: var(--relte-spacing-lg);
  }

  .relte-leaderboard__filter-group {
    min-width: 100%;
  }

  .relte-leaderboard__content {
    padding: var(--relte-spacing-lg);
  }

  .relte-leaderboard__item {
    padding: var(--relte-spacing-md);
  }

  .relte-leaderboard__rank {
    min-width: 40px;
    font-size: var(--relte-font-size-lg);
  }

  .relte-leaderboard__rank--top {
    font-size: var(--relte-font-size-xl);
  }

  .relte-leaderboard__author {
    font-size: var(--relte-font-size-base);
  }

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

  .relte-leaderboard__author-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--relte-spacing-md);
  }

  .relte-leaderboard__author-name {
    font-size: var(--relte-font-size-xl);
  }

  .relte-leaderboard__back-button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .relte-leaderboard__header-title {
    font-size: var(--relte-font-size-xl);
  }

  .relte-leaderboard__header-subtitle {
    font-size: var(--relte-font-size-sm);
  }
}