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

:root {
  --bg: #0a0f1a;
  --surface: #131a2b;
  --surface-hover: #1c2640;
  --border: #1e2a45;
  --text: #d1d5e0;
  --text-muted: #7a8299;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --green: #22c55e;
  --red: #ef4444;
  --orange: #f59e0b;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

header h1 { font-size: 1.25rem; font-weight: 700; }
header h1 a { color: var(--text); }
header h1 a:hover { text-decoration: none; color: var(--accent); }

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.welcome {
  text-align: center;
  padding: 4rem 1rem;
}

.welcome h2 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.welcome p { color: var(--text-muted); margin-bottom: 1.5rem; }

section { margin-bottom: 2.5rem; }

section h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
}

.btn-small { padding: 0.375rem 0.75rem; font-size: 0.8rem; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.challenge-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.challenge-card.joined { border-color: var(--accent); }

.challenge-card.compact { padding: 0.5rem 0.75rem; }
.challenge-card.compact .challenge-header { margin-bottom: 0; }
.challenge-card.compact .challenge-header h3 { font-size: 0.9rem; }
.challenge-card.compact p { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.125rem; }

.challenge-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}
.challenge-card:not(.compact) .challenge-header { justify-content: space-between; }

.challenge-header h3 { font-size: 1rem; font-weight: 600; }

.badge {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  background: var(--border);
  color: var(--text-muted);
}

.progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.75rem 0;
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.summit-list, .activity-list {
  list-style: none;
}

.summit-item, .activity-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

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

.date, .activity-date {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.activity-type {
  font-size: 0.75rem;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  background: var(--border);
  color: var(--text-muted);
}

.summit-count { color: var(--green); font-size: 0.85rem; }
.no-summits { color: var(--text-muted); font-size: 0.8rem; }
.analysing { color: var(--text-muted); font-size: 0.8rem; font-style: italic; }

.empty { color: var(--text-muted); text-align: center; padding: 1.5rem; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 400px;
  width: 90%;
}

.modal h3 { margin-bottom: 0.5rem; font-size: 1.1rem; }
.modal > p { color: var(--text-muted); margin-bottom: 1rem; font-size: 0.9rem; }

.btn-block {
  width: 100%;
  justify-content: center;
  margin-bottom: 0.375rem;
}

.modal-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.challenge-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
}

.joined-date { color: var(--green); }

.desc-setting { color: var(--text-muted); }

.modal-label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 1rem;
  margin-bottom: 0.375rem;
  color: var(--text);
}

.modal-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
  transition: border-color 0.15s, background 0.15s;
}

.modal-option.active {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.modal-option input { accent-color: var(--accent); }

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1rem;
}

.gpx-section .hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.gpx-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: 'SF Mono', 'Menlo', monospace;
  font-size: 0.8rem;
  padding: 0.75rem;
  resize: vertical;
  margin-bottom: 0.75rem;
}

.gpx-input:focus {
  outline: none;
  border-color: var(--accent);
}

.gpx-result {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.gpx-result h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.gpx-result > p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* Admin */
.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.admin-header h2 {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.admin-slug {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Menlo', monospace;
  margin-right: 0.5rem;
}
.admin-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}
.admin-actions {
  display: flex;
  gap: 0.375rem;
}
.admin-form.card {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.admin-form.card h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
}
.form-group {
  margin-bottom: 0.875rem;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-muted);
}
.form-group input[type="text"],
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  padding: 0.5rem 0.625rem;
  font-family: inherit;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; }
.radio-group {
  display: flex;
  gap: 0.5rem;
}
.radio-label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.radio-label.active {
  border-color: var(--accent);
  background: var(--surface-hover);
}
.radio-label input { accent-color: var(--accent); }
.form-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1rem;
}
.error {
  color: var(--red);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}