/* StarMapGen — shared styles (matrix template, indigo accent) */
:root {
  --accent: #3B4E9B;
  --accent-2: #8C9FE0;
  --bg: #FBFBFD;
  --ink: #1F2333;
  --muted: #5C6478;
  --line: #DDE0EC;
  --card: #FFFFFF;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* header */
.site-header { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 60px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.logo { font-family: Georgia, "Times New Roman", serif; font-weight: 400; font-size: 21px;
  color: var(--ink); letter-spacing: 0.03em; }
.logo:hover { text-decoration: none; }
.logo-dot { color: var(--accent-2); }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.main-nav a { color: var(--muted); font-size: 14px; padding: 6px 10px; border-radius: 6px; }
.main-nav a:hover { background: #EEF1FA; color: var(--accent); text-decoration: none; }

/* hero */
.hero { text-align: center; padding: 40px 0 16px; }
.hero h1 { font-family: Georgia, "Times New Roman", serif; font-weight: 400;
  font-size: 40px; margin: 0 0 12px; letter-spacing: 0.02em; }
.hero p { color: var(--muted); max-width: 680px; margin: 0 auto 18px; }
.badge-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.badge { background: #EEF1FA; color: var(--accent); border: 1px solid #CBD4F0; border-radius: 999px; padding: 4px 12px; font-size: 13px; font-weight: 500; }

/* star map tool */
.sm-shell { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 26px; margin: 22px 0; }
.sm-grid { display: grid; grid-template-columns: 320px 1fr; gap: 28px; }
.sm-form { display: flex; flex-direction: column; gap: 14px; }
.sm-field { display: flex; flex-direction: column; gap: 5px; position: relative; }
.sm-field label { font-size: 13px; font-weight: 600; color: var(--muted); }
/* quick-start preset chips */
.sm-presets { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; }
.sm-presets-label { flex-basis: 100%; font-size: 12px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: .06em; }
.sm-preset { border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 999px; padding: 5px 13px; font-size: 13px; cursor: pointer; }
.sm-preset:hover { border-color: var(--accent-2); background: #EEF1FA; }
.sm-preset.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.sm-field input, .sm-field select {
  padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 14px; background: #fff; color: var(--ink); width: 100%;
}
.sm-field input:focus, .sm-field select:focus { outline: 2px solid var(--accent-2); border-color: var(--accent-2); }
.sm-hint { font-size: 12px; color: var(--muted); }
.sm-dd { position: absolute; top: 100%; left: 0; right: 0; background: #fff; border: 1px solid var(--line);
  border-radius: 8px; box-shadow: 0 8px 22px rgba(31,35,51,.12); z-index: 30; max-height: 260px; overflow: auto; }
.sm-dd-item { padding: 9px 12px; font-size: 14px; cursor: pointer; }
.sm-dd-item:hover { background: #EEF1FA; }
.sm-dd-cc { color: var(--muted); font-size: 12px; }
.sm-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sm-toggles { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.sm-toggles label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink); }
.sm-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.sm-share-note { font-size: 13px; color: var(--accent); min-height: 20px; word-break: break-all; }
.sm-share-note.show { color: var(--accent); }
.sm-preview { min-width: 0; }
#sky-holder svg { width: 100%; height: auto; display: block; border-radius: 10px;
  box-shadow: 0 10px 34px rgba(20,26,58,.22); }
.sm-print-note { margin: 10px 0 0; font-size: 12.5px; color: var(--muted); text-align: center; }
.sm-print-note strong { color: var(--ink); font-weight: 600; }
.sm-error { color: #9B2C2C; }
#sky-holder svg { cursor: zoom-in; }
.sm-lightbox { position: fixed; inset: 0; background: rgba(6, 8, 18, .95); z-index: 200;
  display: flex; align-items: center; justify-content: center; padding: 12px; cursor: zoom-out; }
.sm-lightbox svg { max-width: 100%; max-height: 92vh; width: auto; height: auto;
  border-radius: 8px; box-shadow: 0 24px 60px rgba(0, 0, 0, .5); }
.sm-lightbox-close { position: fixed; z-index: 202; top: 14px; right: 16px; width: 38px; height: 38px;
  border-radius: 50%; border: 1px solid rgba(255, 255, 255, .35); background: rgba(255, 255, 255, .1);
  color: #fff; font-size: 20px; line-height: 1; cursor: pointer; }
.sm-lightbox-tip { position: fixed; z-index: 202; bottom: 14px; left: 0; right: 0; text-align: center;
  color: rgba(255, 255, 255, .6); font-size: 12.5px; letter-spacing: .04em; pointer-events: none; }
body.sm-locked { overflow: hidden; }
@media (max-width: 900px) {
  /* phones: show the poster at 2x and let the reader pan around it */
  .sm-lightbox { overflow: auto; display: block; padding: 8px; }
  .sm-lightbox svg { width: 780px; max-width: none; max-height: none; margin: 0 auto; display: block; }
}

.btn {
  display: inline-block; background: var(--accent); color: #fff; border: none; border-radius: 9px;
  padding: 12px 20px; font-size: 15px; font-weight: 600; cursor: pointer; letter-spacing: .01em;
}
.btn:hover { background: #2F3F7F; text-decoration: none; }
.btn-ghost { background: #fff; color: var(--accent); border: 1px solid var(--accent-2); }
.btn-ghost:hover { background: #EEF1FA; }

/* tool cards on hub */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; padding: 24px 0 12px; }
.tool-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px; display: flex; flex-direction: column; gap: 8px; transition: border-color .15s, box-shadow .15s; }
.tool-card:hover { border-color: var(--accent-2); box-shadow: 0 4px 18px rgba(59,78,155,.08); }
.tool-card h3 { margin: 0; font-size: 17px; }
.tool-card h3 a { color: var(--ink); }
.tool-card p { margin: 0; color: var(--muted); font-size: 14px; flex: 1; }
.tool-card .go { font-weight: 600; font-size: 14px; }

/* article content */
.article { padding: 8px 0 32px; }
.article h2 { font-size: 22px; margin: 28px 0 10px; letter-spacing: -0.01em; }
.article h3 { font-size: 17px; margin: 20px 0 8px; }
.article p { margin: 0 0 14px; }
.article ul, .article ol { padding-left: 24px; margin: 0 0 14px; }
.article li { margin: 4px 0; }
.article table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14px; }
.article th { text-align: left; background: #EEF1FA; padding: 8px 10px; border: 1px solid var(--line); }
.article td { padding: 8px 10px; border: 1px solid var(--line); }
.callout { background: #EEF1FA; border: 1px solid #CBD4F0; border-radius: 10px; padding: 14px 18px; margin: 16px 0; }
.callout p { margin: 0; }
.faq details { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin: 8px 0; background: #fff; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 15px; }
.faq details p { margin: 8px 0 2px; color: var(--muted); font-size: 14px; }
.tool-links { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.tool-links a { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 8px 14px; font-size: 14px; }
.tool-links a:hover { border-color: var(--accent-2); text-decoration: none; }

/* guides hub */
.guide-group { margin: 20px 0; }
.guide-group h2 { font-size: 18px; margin: 24px 0 10px; }
.guide-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr; gap: 8px; }
.guide-list li { border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.guide-list a { display: block; padding: 12px 16px; }
.guide-list a:hover { text-decoration: none; border-color: var(--accent-2); }
.guide-list .g-desc { color: var(--muted); font-size: 13px; display: block; }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--card); margin-top: 40px; padding: 28px 0 40px; }
.site-footer p { margin: 6px 0; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; margin: 10px 0; }
.footer-links a { color: var(--muted); font-size: 13px; }
.fine { color: var(--muted); font-size: 12px; }

@media (max-width: 900px) {
  .sm-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .hero h1 { font-size: 26px; }
  .sm-shell { padding: 16px; }
  .main-nav { margin-left: 0; }
}