:root {
  --bg: #0b0e1a;
  --bg-card: #141828;
  --bg-elevated: #1c2136;
  --border: #2a2f48;
  --text: #e2e4f0;
  --text-dim: #8b8fa8;
  --accent: #a78bfa;
  --accent-hover: #c4b5fd;
  --accent-glow: rgba(167, 139, 250, 0.15);
  --star: #e8d5f5;
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --tier-naked: #34d399;
  --tier-binoculars: #60a5fa;
  --tier-small: #a78bfa;
  --tier-medium: #fbbf24;
  --tier-large: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
}

.logo-text {
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.2;
}
.logo-text small {
  font-weight: 400;
  color: var(--text-dim);
  font-size: 0.7rem;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}
.site-nav a:hover { color: var(--accent-hover); }

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.setup-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 2rem;
}

.setup-panel h1 {
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

.setup-intro {
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.field-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

.field-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  appearance: auto;
}

.seg {
  display: flex;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.seg-btn {
  flex: 1;
  padding: 0.6rem;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.seg-btn.active {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
}

.seg-btn:not(.active):hover {
  color: var(--text);
}

.presets-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-family: inherit;
}

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

.btn.subtle {
  background: transparent;
  border-color: transparent;
  color: var(--text-dim);
}
.btn.subtle:hover { color: var(--accent-hover); background: var(--accent-glow); }

.btn.danger {
  color: var(--danger);
  border-color: var(--danger);
  background: transparent;
}
.btn.danger:hover { background: rgba(248,113,113,0.1); }

.results-area {
  margin-bottom: 2rem;
}

.results-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1rem;
}

.results-header h2 {
  font-size: 1.3rem;
}

.result-count {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.results-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.object-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.object-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}

.object-card:hover {
  border-color: var(--accent);
}

.object-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  color: var(--text);
  font-family: inherit;
  font-size: inherit;
}

.object-card-header:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.obj-check {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s;
}

.obj-check.checked {
  background: var(--success);
  border-color: var(--success);
}

.obj-check.checked::after {
  content: '✓';
  color: var(--bg);
  font-size: 0.8rem;
  font-weight: 700;
}

.obj-main {
  flex: 1;
  min-width: 0;
}

.obj-name {
  font-weight: 600;
  font-size: 1rem;
}

.obj-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.tag {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tag-type { background: var(--accent-glow); color: var(--accent); }
.tag-gear-naked { background: rgba(52,211,153,0.15); color: var(--tier-naked); }
.tag-gear-binoculars { background: rgba(96,165,250,0.15); color: var(--tier-binoculars); }
.tag-gear-small { background: rgba(167,139,250,0.15); color: var(--tier-small); }
.tag-gear-medium { background: rgba(251,191,36,0.15); color: var(--tier-medium); }
.tag-gear-large { background: rgba(248,113,113,0.15); color: var(--tier-large); }
.tag-mag { background: rgba(232,213,245,0.12); color: var(--star); }
.tag-constellation { color: var(--text-dim); font-size: 0.75rem; }

.obj-rank {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.object-card-body {
  padding: 0 1.25rem 1rem;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.object-card-body p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.object-card-body .tip {
  color: var(--accent-hover);
  font-style: italic;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
}

.content-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.observation-log, .gear-guide {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.observation-log h2, .gear-guide h2 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.log-info {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.log-stats {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.log-list {
  list-style: none;
  margin-bottom: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.log-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.log-list li .log-gear {
  color: var(--text-dim);
  font-size: 0.75rem;
}

.gear-tiers {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.gear-tier h3 {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.gear-tier p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.magnitude-explainer, .common-mistakes, .urban-vs-dark {
  margin-bottom: 2rem;
}

.magnitude-explainer h2, .common-mistakes h2, .urban-vs-dark h2 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.magnitude-explainer p, .common-mistakes p {
  color: var(--text-dim);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.mistake-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mistake-list li {
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-dim);
}

.mistake-list li strong {
  color: var(--text);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.compare-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.compare-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.compare-card p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  margin-top: 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}

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

@media (max-width: 768px) {
  .header-inner { padding: 0.6rem 1rem; }
  main { padding: 1.25rem 1rem 3rem; }
  .setup-panel { padding: 1.25rem; }
  .setup-grid { grid-template-columns: 1fr 1fr; }
  .results-header { flex-direction: column; align-items: flex-start; }
  .content-columns { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .log-stats { gap: 1rem; }
}

@media (max-width: 480px) {
  .setup-grid { grid-template-columns: 1fr; }
  .presets-row { flex-direction: column; }
  .results-actions { width: 100%; }
  .results-actions .btn { flex: 1; }
}

@media print {
  body { background: #fff; color: #222; }
  .site-header, .site-footer, .setup-panel, .observation-log, .results-actions, .magnitude-explainer, .common-mistakes, .urban-vs-dark { display: none; }
  .results-area h2 { color: #222; }
  .object-card { border: 1px solid #ccc; break-inside: avoid; }
  .object-card-body { display: block !important; }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}