/* CUA Challenge Site - Shared Styles */
:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #242836;
  --border: #2e3345;
  --text: #e4e7ef;
  --text-muted: #8b90a0;
  --accent: #6c63ff;
  --accent-hover: #5a52e0;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --radius: 12px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

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

/* Hub card grid */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.challenge-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.challenge-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(108, 99, 255, 0.15);
  color: var(--text);
}

.challenge-card .icon {
  font-size: 2.5rem;
}

.challenge-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
}

.challenge-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  flex: 1;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  align-self: flex-start;
}

.badge-easy { background: rgba(52, 211, 153, 0.15); color: var(--success); }
.badge-medium { background: rgba(251, 191, 36, 0.15); color: var(--warning); }
.badge-hard { background: rgba(248, 113, 113, 0.15); color: var(--danger); }

/* Challenge page layout */
.challenge-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

.challenge-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.challenge-header h1 {
  font-size: 1.5rem;
  flex: 1;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: border-color 0.2s;
}

.back-link:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:active { transform: scale(0.97); }

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

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

.btn-success {
  background: var(--success);
  color: #000;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* Results panel */
.results-panel {
  margin-top: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: none;
}

.results-panel.visible { display: block; }

.results-panel h2 {
  padding: 16px 20px;
  font-size: 1rem;
  background: rgba(108, 99, 255, 0.1);
  border-bottom: 1px solid var(--border);
}

.results-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px;
  font-size: 1.3rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
}
.results-status.pass { color: var(--success); background: rgba(52, 211, 153, 0.06); }
.results-status.fail { color: var(--danger); background: rgba(248, 113, 113, 0.06); }

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1px;
  background: var(--border);
}

.results-grid .metric {
  background: var(--surface);
  padding: 16px 20px;
}

.results-grid .metric-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.results-grid .metric-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.results-time {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.results-time .metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.results-time .metric-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.results-section {
  border-top: 1px solid var(--border);
}
.results-section h4 {
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 20px 0;
}

/* Status bar */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

.status-bar .label { color: var(--text-muted); }
.status-bar .value { font-weight: 600; }

/* Arena / play area */
.arena {
  position: relative;
  width: 100%;
  height: min(500px, calc(100vh - 220px));
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* Header bar for site title */
.site-header {
  text-align: center;
  padding: 40px 20px 10px;
}

.site-header h1 {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-header p {
  color: var(--text-muted);
  margin-top: 8px;
  font-size: 1rem;
}

/* Popup / Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 500px;
  width: 90%;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s;
}

.modal-close:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* Form styles */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

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

/* Scrollable container */
.scrollable {
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: var(--bg);
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 900;
}

/* Feed cards */
.feed {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 40px;
}

.feed-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.feed-card.target {
  border-color: var(--warning);
}

.feed-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.feed-card .username {
  font-weight: 600;
  font-size: 0.9rem;
}

.feed-card .timestamp {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.feed-card .card-body {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.collect-btn {
  margin-top: 10px;
  padding: 6px 14px;
  background: var(--warning);
  color: #000;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
}

.collect-btn:hover { opacity: 0.85; }
.collect-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Start screen */
.start-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  gap: 16px;
}

.start-screen p {
  color: var(--text-muted);
  max-width: 500px;
  text-align: center;
}