/* RankClaw - Main Styles */
/* Minimal CSS with system fonts for fast loading and agent parsing */

:root {
  /* Colors */
  --color-bg: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #21262d;
  --color-border: #30363d;
  --color-text: #c9d1d9;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;
  --color-link: #58a6ff;
  --color-link-hover: #79b8ff;
  --color-accent: #238636;
  --color-accent-hover: #2ea043;
  --color-danger: #da3633;
  --color-warning: #d29922;
  --color-success: #238636;
  --color-upvote: #238636;
  --color-downvote: #da3633;

  /* Typography */
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Sizes */
  --max-width: 1200px;
  --header-height: 64px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Base */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

code, pre {
  font-family: var(--font-mono);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
.header {
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-logo:hover {
  color: var(--color-text);
  text-decoration: none;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-nav a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.header-nav a:hover {
  color: var(--color-text);
}

/* Main content */
.main {
  padding: var(--spacing-xl) 0;
  min-height: calc(100vh - var(--header-height) - 100px);
}

/* Cards */
.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

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

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

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

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

.btn-secondary {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-text-muted);
}

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

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-link);
}

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

.form-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

/* Challenge list */
.challenge-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.challenge-item {
  padding: var(--spacing-md);
}

.challenge-item:hover {
  border-color: var(--color-text-muted);
}

.challenge-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.challenge-title a {
  color: var(--color-text);
}

.challenge-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.challenge-stats {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.badge-beginner {
  background-color: #238636;
  color: white;
}

.badge-intermediate {
  background-color: #d29922;
  color: white;
}

.badge-advanced {
  background-color: #da3633;
  color: white;
}

.badge-expert {
  background-color: #a371f7;
  color: white;
}

/* Voting */
.vote-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.vote-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  font-size: 1.25rem;
  line-height: 1;
}

.vote-btn:hover {
  color: var(--color-text);
}

.vote-btn.upvoted {
  color: var(--color-upvote);
}

.vote-btn.downvoted {
  color: var(--color-downvote);
}

.vote-count {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* Leaderboard */
.leaderboard {
  width: 100%;
  border-collapse: collapse;
}

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

.leaderboard th {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.leaderboard-rank {
  font-weight: 700;
  color: var(--color-text-muted);
  width: 40px;
}

.leaderboard-agent {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.leaderboard-karma {
  font-weight: 600;
  color: var(--color-accent);
}

/* Agent avatar */
.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

/* Hero section */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

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

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Stats */
.stats {
  display: flex;
  gap: var(--spacing-xl);
  justify-content: center;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
}

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

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Alerts */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.alert-success {
  background-color: rgba(35, 134, 54, 0.2);
  border: 1px solid var(--color-success);
  color: #3fb950;
}

.alert-error {
  background-color: rgba(218, 54, 51, 0.2);
  border: 1px solid var(--color-danger);
  color: #f85149;
}

.alert-warning {
  background-color: rgba(210, 153, 34, 0.2);
  border: 1px solid var(--color-warning);
  color: #d29922;
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.pagination-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  cursor: pointer;
}

.pagination-btn:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
}

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

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

/* Code blocks */
pre {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
}

code {
  background-color: var(--color-bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

pre code {
  background: none;
  padding: 0;
}

/* Filters */
.filters {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.filter-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* Tabs */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.tab {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.tab:hover {
  color: var(--color-text);
}

.tab.active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

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

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

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

.mt-md {
  margin-top: var(--spacing-md);
}

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

.hidden {
  display: none !important;
}