/*
Theme Name: Astronomy 101
Theme URI: https://astronomy101.co.uk/
Author: Astronomy 101
Author URI: https://astronomy101.co.uk/
Description: Dark, cosmic WordPress theme for Astronomy 101 — in-depth astronomy guides, stargazing hub, and client-side astronomy calculators. Ported from the Astronomy 101 React application.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.8
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: astronomy101
Tags: dark, astronomy, science, education, blog, custom-menu, featured-images, threaded-comments
*/

/* ============================================================
   ASTRONOMY 101 — DESIGN SYSTEM
   Dark-only cosmic theme. Fonts: Syne (display), Plus Jakarta Sans
   (body), JetBrains Mono (labels/data).
   ============================================================ */

:root {
  --font-display: 'Syne', sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --bg: #05070D;
  --bg-deep: #020617;
  --surface: #0B1120;
  --card: rgba(13, 19, 33, 0.75);
  --card-hover: rgba(15, 23, 42, 0.85);
  --border: #1e293b;
  --border-soft: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.3);

  --text: #E2E8F0;
  --text-bright: #ffffff;
  --muted: #94a3b8;
  --muted-2: #64748b;

  --cyan: #22d3ee;
  --cyan-soft: rgba(34, 211, 238, 0.12);
  --cyan-dim: #67e8f9;
  --amber: #fbbf24;
  --emerald: #34d399;
  --rose: #fb7185;
  --purple: #a78bfa;

  --radius: 1rem;
  --radius-lg: 1.5rem;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

::selection { background: rgba(34, 211, 238, 0.3); color: #a5f3fc; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1E293B; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #334155; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-dim); }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

h1, h2, h3, h4 { color: var(--text-bright); line-height: 1.2; letter-spacing: -0.01em; }
.font-display { font-family: var(--font-display); }
.font-mono { font-family: var(--font-mono); }

/* ---------- layout ---------- */
.a101-container { max-width: 80rem; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 640px) { .a101-container { padding-left: 1.5rem; padding-right: 1.5rem; } }
@media (min-width: 1024px) { .a101-container { padding-left: 2rem; padding-right: 2rem; } }
.a101-narrow { max-width: 56rem; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 640px) { .a101-narrow { padding-left: 1.5rem; padding-right: 1.5rem; } }

main.site-main { position: relative; z-index: 10; flex: 1; }
.site-wrap { min-height: 100vh; display: flex; flex-direction: column; position: relative; }

/* ---------- celestial canvas ---------- */
#celestial-canvas {
  position: fixed; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0; opacity: 0.8;
}

/* ---------- background glows ---------- */
.space-radial-glow { background: radial-gradient(circle at 50% 0%, rgba(30, 58, 138, 0.25) 0%, rgba(15, 23, 42, 0) 70%); }
.nebula-glow { background: radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.12) 0%, rgba(56, 189, 238, 0.08) 35%, transparent 70%); }

/* ---------- cards ---------- */
.astro-card {
  background: var(--card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
}
.astro-card-hover { transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), background-color 0.2s var(--ease); }
a.astro-card-hover:hover, .astro-card-hover:hover {
  border-color: var(--border-glow);
  background-color: var(--card-hover);
}

/* ---------- typography helpers ---------- */
.kicker {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--cyan); font-weight: 600;
}
.section-title { font-family: var(--font-display); font-weight: 700; color: #fff; letter-spacing: -0.02em; }
.lead { color: var(--muted); line-height: 1.75; }

/* ---------- badges / pills ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-family: var(--font-mono); font-size: 0.65rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 0.3rem 0.7rem; border-radius: 999px; border: 1px solid transparent;
  white-space: nowrap;
}
.badge-cyan { background: rgba(8, 51, 68, 0.8); border-color: rgba(34, 211, 238, 0.4); color: #a5f3fc; }
.badge-emerald { background: rgba(6, 60, 45, 0.8); border-color: rgba(52, 211, 153, 0.4); color: #a7f3d0; }
.badge-amber { background: rgba(69, 45, 7, 0.8); border-color: rgba(251, 191, 36, 0.4); color: #fde68a; }
.badge-rose { background: rgba(76, 15, 28, 0.8); border-color: rgba(251, 113, 133, 0.4); color: #fecdd3; }
.badge-slate { background: rgba(15, 23, 42, 0.9); border-color: var(--border); color: var(--muted); }
.badge-purple { background: rgba(46, 28, 96, 0.8); border-color: rgba(167, 139, 250, 0.4); color: #ddd6fe; }

.pill-filter {
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600;
  padding: 0.5rem 1rem; border-radius: 999px; border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.6); color: var(--muted);
  transition: all 0.2s var(--ease);
}
.pill-filter:hover { color: #fff; border-color: #475569; }
.pill-filter.active { background: rgba(8, 51, 68, 0.7); border-color: rgba(34, 211, 238, 0.5); color: #a5f3fc; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600;
  padding: 0.65rem 1.25rem; border-radius: 0.6rem; border: 1px solid transparent;
  transition: all 0.2s var(--ease); white-space: nowrap;
}
.btn .icon, .btn svg { width: 0.9rem; height: 0.9rem; }
.btn-primary { background: var(--cyan); color: #020617; box-shadow: 0 0 15px rgba(6, 182, 212, 0.2); }
.btn-primary:hover { background: #67e8f9; color: #020617; }
.btn-secondary { background: #0f172a; border-color: var(--border); color: var(--text); }
.btn-secondary:hover { border-color: #475569; color: #fff; }
.btn-ghost { color: var(--cyan); padding: 0.65rem 0.75rem; }
.btn-ghost:hover { color: var(--cyan-dim); }
.btn-ghost svg { transition: transform 0.2s var(--ease); }
.btn-ghost:hover svg { transform: translateX(4px); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40; width: 100%;
  background: rgba(5, 7, 13, 0.9); backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 41, 59, 0.8);
}
.header-inner { max-width: 80rem; margin: 0 auto; padding: 0 1rem; height: 4rem; display: flex; align-items: center; justify-content: space-between; }
@media (min-width: 640px) { .header-inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .header-inner { padding: 0 2rem; } }

.brand { display: flex; align-items: center; gap: 0.65rem; }
.brand-tile {
  width: 2rem; height: 2rem; border-radius: 0.55rem; flex-shrink: 0;
  background: rgba(8, 51, 68, 0.8); border: 1px solid rgba(34, 211, 238, 0.4);
  display: flex; align-items: center; justify-content: center; color: var(--cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.15); transition: border-color 0.2s;
}
.brand:hover .brand-tile { border-color: var(--cyan); }
.brand-tile svg { width: 1rem; height: 1rem; animation: orbit-spin 12s linear infinite; }
@keyframes orbit-spin { to { transform: rotate(360deg); } }
.brand-name { font-size: 1.125rem; font-weight: 700; font-family: var(--font-display); letter-spacing: -0.02em; color: #fff; transition: color 0.2s; }
.brand:hover .brand-name { color: #a5f3fc; }

.main-nav { display: none; }
@media (min-width: 768px) { .main-nav { display: flex; align-items: center; gap: 1.75rem; } }
.main-nav a {
  font-size: 0.875rem; font-weight: 500; color: #cbd5e1; position: relative;
  padding: 0.25rem 0; transition: color 0.2s; white-space: nowrap;
}
.main-nav a:hover { color: #fff; }
.main-nav a.active { color: var(--cyan); font-weight: 600; }
.main-nav a.active::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: var(--cyan); border-radius: 999px;
}

.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.search-trigger {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.4rem 0.75rem;
  border-radius: 0.55rem; background: #0f172a; border: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); transition: all 0.2s;
}
.search-trigger:hover { border-color: #475569; color: #e2e8f0; }
.search-trigger svg { width: 0.85rem; height: 0.85rem; color: var(--cyan); }
.search-trigger kbd {
  display: none; font-size: 0.62rem; background: var(--bg-deep); padding: 0.15rem 0.4rem;
  border-radius: 0.3rem; border: 1px solid var(--border); color: var(--muted-2);
}
@media (min-width: 1024px) { .search-trigger kbd { display: inline-block; } }
@media (max-width: 639px) { .search-trigger .st-label { display: none; } }

.mobile-toggle { display: inline-flex; padding: 0.5rem; color: var(--muted); background: none; border: none; border-radius: 0.5rem; }
.mobile-toggle:hover { color: #fff; }
.mobile-toggle svg { width: 1.25rem; height: 1.25rem; }
@media (min-width: 768px) { .mobile-toggle { display: none; } }
@media (max-width: 639px) { .read-guides-btn { display: none; } }

.mobile-drawer {
  display: none; border-bottom: 1px solid var(--border);
  background: rgba(2, 6, 23, 0.95); backdrop-filter: blur(16px);
  padding: 0.75rem 1rem 1.5rem;
}
.mobile-drawer.open { display: block; }
@media (min-width: 768px) { .mobile-drawer.open { display: none; } }
.mobile-drawer a.mnav {
  display: block; width: 100%; text-align: left; padding: 0.65rem 0.75rem;
  border-radius: 0.55rem; font-size: 0.875rem; font-weight: 500; color: #cbd5e1;
  border: 1px solid transparent;
}
.mobile-drawer a.mnav:hover { background: #0f172a; color: #fff; }
.mobile-drawer a.mnav.active { background: rgba(8, 51, 68, 0.4); color: #a5f3fc; border-color: rgba(34, 211, 238, 0.3); }
.mobile-drawer .md-cta { margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--border); }

/* ---------- search modal ---------- */
.search-overlay {
  position: fixed; inset: 0; z-index: 50; background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  display: none; overflow-y: auto;
}
.search-overlay.open { display: block; }
.search-panel {
  max-width: 42rem; margin: 4rem auto 2rem; background: #0B1120;
  border: 1px solid var(--border); border-radius: 1rem; overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
}
@media (min-width: 640px) { .search-panel { margin-top: 6rem; } }
.search-input-row { display: flex; align-items: center; gap: 0.75rem; padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); }
.search-input-row svg { width: 1.1rem; height: 1.1rem; color: var(--cyan); flex-shrink: 0; }
.search-input-row input {
  flex: 1; background: none; border: none; outline: none; color: #fff;
  font-size: 1rem;
}
.search-input-row input::placeholder { color: var(--muted-2); }
.search-clear { background: none; border: none; color: var(--muted-2); padding: 0.25rem; display: none; }
.search-clear:hover { color: #fff; }
.search-clear svg { width: 1rem; height: 1rem; }
.search-esc { font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted-2); border: 1px solid var(--border); border-radius: 0.35rem; padding: 0.2rem 0.5rem; }
.search-filters { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0.9rem 1.25rem; border-bottom: 1px solid var(--border); }
.search-results { max-height: 55vh; overflow-y: auto; padding: 0.75rem 1.25rem 1.25rem; }
.search-group-label {
  display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono);
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--muted); margin: 1.1rem 0 0.6rem; font-weight: 600;
}
.search-group-label svg { width: 0.85rem; height: 0.85rem; color: var(--cyan); }
.search-group-label:first-child { margin-top: 0.25rem; }
.search-item {
  display: block; padding: 0.7rem 0.8rem; border-radius: 0.6rem; border: 1px solid transparent;
  transition: all 0.15s;
}
.search-item:hover { background: rgba(15, 23, 42, 0.8); border-color: var(--border); }
.search-item .si-meta { font-family: var(--font-mono); font-size: 0.65rem; color: var(--cyan); text-transform: uppercase; letter-spacing: 0.06em; }
.search-item .si-title { color: #fff; font-weight: 600; font-size: 0.9rem; margin: 0.2rem 0; }
.search-item .si-desc { color: var(--muted); font-size: 0.78rem; line-height: 1.5; }
.planet-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.planet-grid .search-item { display: flex; align-items: center; gap: 0.6rem; }
.planet-dot { width: 0.7rem; height: 0.7rem; border-radius: 999px; flex-shrink: 0; }
.search-empty { text-align: center; padding: 2.5rem 1rem; color: var(--muted); font-size: 0.9rem; }

/* ---------- hero / cards ---------- */
.hero-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 1024px) { .hero-grid { grid-template-columns: repeat(12, 1fr); } .hero-lead { grid-column: span 7; } .hero-side { grid-column: span 5; } }

.card-media { position: relative; overflow: hidden; border-radius: var(--radius) var(--radius) 0 0; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease); }
a:hover .card-media img, .group:hover .card-media img { transform: scale(1.05); }
.card-media .media-gradient {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(5, 7, 13, 0.95) 0%, rgba(5, 7, 13, 0.35) 55%, transparent 100%);
  pointer-events: none;
}
.media-badge-row { position: absolute; top: 1rem; left: 1rem; display: flex; gap: 0.5rem; z-index: 2; }

.article-card { display: flex; flex-direction: column; overflow: hidden; }
.article-card .card-body { padding: 1.25rem 1.35rem 1.35rem; display: flex; flex-direction: column; flex: 1; }
.meta-row { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-mono); font-size: 0.68rem; color: var(--cyan); text-transform: uppercase; letter-spacing: 0.08em; flex-wrap: wrap; }
.meta-row .sep { color: var(--muted-2); }
.meta-row .muted { color: var(--muted); }
.card-title { font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 1.25rem; line-height: 1.35; margin: 0.6rem 0 0.5rem; letter-spacing: -0.01em; }
.card-title.lg { font-size: 1.6rem; }
@media (min-width: 640px) { .card-title.lg { font-size: 2.1rem; } }
.card-excerpt { color: var(--muted); font-size: 0.9rem; line-height: 1.65; }
.clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-foot { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: auto; padding-top: 1rem; border-top: 1px solid rgba(30, 41, 59, 0.6); font-size: 0.78rem; color: var(--muted); }
.read-link { display: inline-flex; align-items: center; gap: 0.35rem; color: var(--cyan); font-weight: 600; font-size: 0.8rem; }
.read-link svg { width: 0.9rem; height: 0.9rem; transition: transform 0.2s var(--ease); }
.read-link:hover svg { transform: translateX(4px); }

.tag-pills { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag-pill { font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted); background: rgba(15, 23, 42, 0.7); border: 1px solid var(--border); padding: 0.25rem 0.6rem; border-radius: 999px; }
.tag-pill:hover { color: var(--cyan); border-color: rgba(34, 211, 238, 0.4); }

/* ---------- grids ---------- */
.grid-1-2-3 { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .grid-1-2-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid-1-2-3 { grid-template-columns: repeat(3, 1fr); } }
.grid-1-2 { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .grid-1-2 { grid-template-columns: repeat(2, 1fr); } }

/* ---------- sections ---------- */
.page-section { padding: 3.5rem 0; }
@media (min-width: 640px) { .page-section { padding: 4.5rem 0; } }
.section-head { margin-bottom: 2rem; }
.section-head h2 { font-size: 1.6rem; margin: 0.5rem 0 0.6rem; }
@media (min-width: 640px) { .section-head h2 { font-size: 2rem; } }
.section-head .row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- ad spots ---------- */
.ad-spot {
  border: 1px dashed rgba(34, 211, 238, 0.35); border-radius: var(--radius-lg);
  background: rgba(8, 15, 30, 0.5); padding: 2rem 1.5rem; text-align: center;
}
@media (min-width: 640px) { .ad-spot { padding: 2.5rem 2rem; } }
.ad-spot h3 { font-family: var(--font-display); font-size: 1.25rem; margin: 0.75rem 0 0.5rem; }
.ad-spot p { color: var(--muted); font-size: 0.88rem; max-width: 42rem; margin: 0 auto 1.25rem; }
.ad-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

/* ---------- tonight / stat cards ---------- */
.stat-tile { background: rgba(15, 23, 42, 0.6); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1rem 1.1rem; }
.stat-tile .st-label { font-family: var(--font-mono); font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 0.35rem; }
.stat-tile .st-value { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 600; color: #fff; }
.stat-tile .st-sub { font-size: 0.75rem; color: var(--muted); margin-top: 0.2rem; }

/* ---------- newsletter ---------- */
.newsletter-panel {
  border-radius: var(--radius-lg); padding: 2.5rem 1.5rem; text-align: center;
  background: linear-gradient(135deg, rgba(8, 51, 68, 0.55), rgba(30, 27, 75, 0.45));
  border: 1px solid rgba(34, 211, 238, 0.25); position: relative; overflow: hidden;
}
@media (min-width: 640px) { .newsletter-panel { padding: 3.5rem 2.5rem; } }
.newsletter-panel h2 { font-family: var(--font-display); font-size: 1.6rem; margin: 1rem 0 0.6rem; }
@media (min-width: 640px) { .newsletter-panel h2 { font-size: 2rem; } }
.newsletter-panel .np-icon {
  width: 3rem; height: 3rem; border-radius: 0.9rem; margin: 0 auto;
  background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.35);
  display: flex; align-items: center; justify-content: center; color: var(--cyan);
}
.newsletter-panel .np-icon svg { width: 1.4rem; height: 1.4rem; }
.news-form { display: flex; gap: 0.6rem; max-width: 28rem; margin: 1.5rem auto 0; flex-direction: column; }
@media (min-width: 640px) { .news-form { flex-direction: row; } }
.news-form input {
  flex: 1; background: rgba(2, 6, 23, 0.7); border: 1px solid var(--border);
  border-radius: 0.6rem; padding: 0.7rem 1rem; color: #fff; font-size: 0.9rem; outline: none;
}
.news-form input:focus { border-color: rgba(34, 211, 238, 0.6); }
.news-form input::placeholder { color: var(--muted-2); }
.fine-print { font-size: 0.72rem; color: var(--muted-2); margin-top: 1rem; }
.success-box {
  border: 1px solid rgba(52, 211, 153, 0.4); background: rgba(6, 60, 45, 0.35);
  border-radius: var(--radius); padding: 1.5rem; max-width: 30rem; margin: 1.5rem auto 0;
  display: flex; gap: 0.9rem; align-items: flex-start; text-align: left;
}
.success-box svg { width: 1.5rem; height: 1.5rem; color: var(--emerald); flex-shrink: 0; margin-top: 0.15rem; }

/* ---------- forms ---------- */
.field { margin-bottom: 1.25rem; }
.field label { display: block; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.5rem; }
.field label .req { color: var(--rose); }
.field input[type="text"], .field input[type="email"], .field input[type="date"],
.field input[type="number"], .field input[type="datetime-local"], .field select, .field textarea {
  width: 100%; background: rgba(2, 6, 23, 0.7); border: 1px solid var(--border);
  border-radius: 0.6rem; padding: 0.7rem 1rem; color: #fff; font-size: 0.92rem; outline: none;
  transition: border-color 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: rgba(34, 211, 238, 0.6); }
.field input::placeholder, .field textarea::placeholder { color: var(--muted-2); }
.field select option { background: #0B1120; }
.field textarea { min-height: 8rem; resize: vertical; }
.field .hint { font-size: 0.75rem; color: var(--muted-2); margin-top: 0.4rem; }
.honeypot { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }

/* range slider */
input[type="range"].a101-range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px; background: #1e293b; outline: none; }
input[type="range"].a101-range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 20px; height: 20px; border-radius: 999px;
  background: var(--cyan); border: 3px solid #0B1120; box-shadow: 0 0 12px rgba(34, 211, 238, 0.5); cursor: pointer;
}
input[type="range"].a101-range::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 999px; background: var(--cyan);
  border: 3px solid #0B1120; box-shadow: 0 0 12px rgba(34, 211, 238, 0.5); cursor: pointer;
}

/* ---------- article / single ---------- */
.article-title { font-size: 2rem; margin: 0.75rem 0 0; line-height: 1.25; }
@media (min-width: 640px) { .article-title { font-size: 2.75rem; } }
.breadcrumbs { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); padding: 1.5rem 0 0; }
.breadcrumbs a { color: var(--muted); display: inline-flex; align-items: center; gap: 0.35rem; }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs svg { width: 0.8rem; height: 0.8rem; }
.breadcrumbs .current { color: #cbd5e1; }

.article-header { padding: 2rem 0 0; }
.byline { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 1rem 0; margin: 1.5rem 0; }
.byline .who { display: flex; align-items: center; gap: 0.8rem; }
.avatar { border-radius: 999px; object-fit: cover; border: 1px solid rgba(34, 211, 238, 0.35); }
.byline .who .name { font-weight: 600; color: #fff; font-size: 0.9rem; }
.byline .who .role { font-size: 0.75rem; color: var(--muted); }
.byline .dates { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); }
.byline .dates .upd { color: var(--cyan); }

.share-btn { display: inline-flex; align-items: center; gap: 0.45rem; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; padding: 0.5rem 0.9rem; border-radius: 0.55rem; background: #0f172a; border: 1px solid var(--border); color: var(--muted); transition: all 0.2s; }
.share-btn:hover { color: #fff; border-color: #475569; }
.share-btn svg { width: 0.85rem; height: 0.85rem; }
.share-btn.copied { color: var(--emerald); border-color: rgba(52, 211, 153, 0.5); }

.featured-figure { margin: 0 0 2rem; }
.featured-figure img { width: 100%; border-radius: var(--radius-lg); object-fit: cover; max-height: 28rem; }
.featured-figure figcaption { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted-2); margin-top: 0.6rem; line-height: 1.6; }

.summary-box { background: rgba(8, 51, 68, 0.35); border: 1px solid rgba(34, 211, 238, 0.3); border-radius: var(--radius); padding: 1.5rem 1.6rem; margin-bottom: 2.5rem; }
.summary-box h2 { font-family: var(--font-display); font-size: 1.05rem; margin: 0 0 0.6rem; color: #a5f3fc; }
.summary-box p { color: #cbd5e1; font-size: 0.95rem; line-height: 1.75; margin: 0; }

.toc-box { border: 1px solid var(--border); border-radius: var(--radius); background: rgba(11, 17, 32, 0.7); padding: 1.5rem 1.6rem; margin-bottom: 2.5rem; }
.toc-box h2 { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--cyan); margin: 0 0 1rem; }
.toc-grid { display: grid; grid-template-columns: 1fr; gap: 0.5rem; }
@media (min-width: 640px) { .toc-grid { grid-template-columns: 1fr 1fr; } }
.toc-grid a { display: flex; gap: 0.7rem; align-items: baseline; padding: 0.55rem 0.7rem; border-radius: 0.5rem; font-size: 0.85rem; color: #cbd5e1; transition: all 0.15s; }
.toc-grid a:hover { background: rgba(15, 23, 42, 0.9); color: var(--cyan); }
.toc-grid .toc-num { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted-2); }

.article-body section.guide-section { margin-bottom: 3rem; scroll-margin-top: 6rem; }
.article-body h2.guide-h2 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: #fff; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); margin: 0 0 1.25rem; }
.article-body .guide-p { color: #cbd5e1; line-height: 1.8; margin: 0 0 1.1rem; font-size: 0.98rem; }
.subsection-card { border: 1px solid var(--border); border-radius: 0.8rem; background: rgba(15, 23, 42, 0.5); padding: 1.25rem 1.35rem; margin: 1.25rem 0; }
.subsection-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 0 0 0.5rem; color: #fff; }
.subsection-card p { color: var(--muted); font-size: 0.92rem; line-height: 1.75; margin: 0; }

.callout { border-radius: 0.8rem; padding: 1.25rem 1.35rem; margin: 1.5rem 0; border: 1px solid; display: flex; gap: 0.9rem; }
.callout svg { width: 1.3rem; height: 1.3rem; flex-shrink: 0; margin-top: 0.15rem; }
.callout .co-title { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.35rem; }
.callout p { margin: 0; font-size: 0.9rem; line-height: 1.7; }
.callout-info { background: rgba(8, 51, 68, 0.3); border-color: rgba(34, 211, 238, 0.35); }
.callout-info .co-title, .callout-info svg { color: var(--cyan); }
.callout-info p { color: #cbd5e1; }
.callout-key-takeaway { background: rgba(46, 28, 96, 0.28); border-color: rgba(167, 139, 250, 0.4); }
.callout-key-takeaway .co-title, .callout-key-takeaway svg { color: var(--purple); }
.callout-key-takeaway p { color: #e2e8f0; }
.callout-observation-tip { background: rgba(69, 45, 7, 0.28); border-color: rgba(251, 191, 36, 0.4); }
.callout-observation-tip .co-title, .callout-observation-tip svg { color: var(--amber); }
.callout-observation-tip p { color: #fef3c7; }

/* FAQ accordion */
.faq-item { border: 1px solid var(--border); border-radius: 0.8rem; background: rgba(11, 17, 32, 0.7); margin-bottom: 0.8rem; overflow: hidden; }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; background: none; border: none; padding: 1.1rem 1.25rem; color: #fff; font-weight: 600; font-size: 0.95rem; text-align: left; }
.faq-q svg { width: 1.1rem; height: 1.1rem; color: var(--cyan); flex-shrink: 0; transition: transform 0.25s var(--ease); }
.faq-item.open .faq-q svg { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 1.25rem 1.25rem; color: var(--muted); font-size: 0.92rem; line-height: 1.75; }
.faq-item.open .faq-a { display: block; }

.sources-box { border: 1px solid var(--border); border-radius: var(--radius); background: rgba(11, 17, 32, 0.7); padding: 1.5rem 1.6rem; margin: 2.5rem 0; }
.sources-box h2 { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--cyan); margin: 0 0 1rem; }
.sources-box ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.sources-box li { display: flex; align-items: center; justify-content: space-between; gap: 1rem; font-size: 0.88rem; color: #cbd5e1; }
.verify-link { display: inline-flex; align-items: center; gap: 0.3rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--cyan); white-space: nowrap; }
.verify-link svg { width: 0.8rem; height: 0.8rem; }

.author-box { display: flex; gap: 1.25rem; border: 1px solid var(--border); border-radius: var(--radius); background: rgba(11, 17, 32, 0.7); padding: 1.6rem; margin: 2.5rem 0; align-items: flex-start; flex-direction: column; }
@media (min-width: 640px) { .author-box { flex-direction: row; } }
.author-box img { width: 4rem; height: 4rem; flex-shrink: 0; }
.author-box .ab-creds { font-family: var(--font-mono); font-size: 0.7rem; color: var(--cyan); margin: 0.3rem 0 0.6rem; }
.author-box p { color: var(--muted); font-size: 0.9rem; line-height: 1.7; margin: 0; }

.explore-banner { border-radius: var(--radius-lg); padding: 2.5rem 1.5rem; text-align: center; background: linear-gradient(135deg, rgba(8, 51, 68, 0.6), rgba(46, 28, 96, 0.4)); border: 1px solid rgba(34, 211, 238, 0.25); margin: 2.5rem 0; }
@media (min-width: 640px) { .explore-banner { padding: 3rem 2rem; } }
.explore-banner h3 { font-family: var(--font-display); font-size: 1.5rem; margin: 0.6rem 0; }
.explore-banner p { color: var(--muted); max-width: 36rem; margin: 0 auto 1.4rem; font-size: 0.92rem; }

/* ---------- tools ---------- */
.tool-shell { max-width: 56rem; margin: 0 auto; }
.tool-inputs { display: grid; gap: 1.1rem; }
.tool-output { margin-top: 1.5rem; }
.output-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
@media (min-width: 640px) { .output-grid { grid-template-columns: repeat(4, 1fr); } }
.preset-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.6rem; }
.preset-chip { font-family: var(--font-mono); font-size: 0.68rem; padding: 0.4rem 0.75rem; border-radius: 999px; background: rgba(15, 23, 42, 0.7); border: 1px solid var(--border); color: var(--muted); transition: all 0.15s; }
.preset-chip:hover { color: var(--cyan); border-color: rgba(34, 211, 238, 0.45); }
.range-row { display: flex; align-items: center; gap: 1rem; }
.range-row input[type="range"] { flex: 1; }
.range-row input[type="number"] { width: 5.5rem; background: rgba(2, 6, 23, 0.7); border: 1px solid var(--border); border-radius: 0.55rem; padding: 0.5rem 0.7rem; color: #fff; font-family: var(--font-mono); font-size: 0.85rem; }
.seg-control { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.seg-btn { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; padding: 0.55rem 1rem; border-radius: 0.6rem; border: 1px solid var(--border); background: rgba(15, 23, 42, 0.6); color: var(--muted); transition: all 0.15s; }
.seg-btn.active { background: rgba(8, 51, 68, 0.7); border-color: rgba(34, 211, 238, 0.5); color: #a5f3fc; }

.moon-visual { width: 10rem; height: 10rem; border-radius: 999px; margin: 0 auto; position: relative; transition: background 0.5s; box-shadow: 0 0 40px rgba(148, 163, 184, 0.15); }
.moon-craters span { position: absolute; border-radius: 999px; background: rgba(100, 116, 139, 0.35); }

.fov-sim { width: 14rem; height: 14rem; border-radius: 999px; border: 2px solid rgba(148, 163, 184, 0.5); margin: 0 auto; position: relative; background: rgba(2, 6, 23, 0.6); }
.fov-sim .crosshair-h, .fov-sim .crosshair-v { position: absolute; background: rgba(148, 163, 184, 0.25); }
.fov-sim .crosshair-h { left: 0; right: 0; top: 50%; height: 1px; }
.fov-sim .crosshair-v { top: 0; bottom: 0; left: 50%; width: 1px; }
.fov-moon { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); border-radius: 999px; background: radial-gradient(circle at 35% 35%, #f1f5f9, #94a3b8 70%, #64748b); transition: width 0.4s, height 0.4s; box-shadow: 0 0 20px rgba(241, 245, 249, 0.25); }

.mag-bar { height: 0.6rem; border-radius: 999px; background: #1e293b; overflow: hidden; position: relative; }
.mag-bar .mag-fill { height: 100%; background: linear-gradient(90deg, #0891b2, #22d3ee); border-radius: 999px; transition: width 0.3s var(--ease); }
.mag-scale { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted-2); margin-top: 0.4rem; }

.status-pill { display: inline-flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; padding: 0.4rem 0.85rem; border-radius: 999px; border: 1px solid; }
.status-ok { color: #a7f3d0; border-color: rgba(52, 211, 153, 0.5); background: rgba(6, 60, 45, 0.4); }
.status-warn { color: #fde68a; border-color: rgba(251, 191, 36, 0.5); background: rgba(69, 45, 7, 0.4); }
.status-bad { color: #fecdd3; border-color: rgba(251, 113, 133, 0.5); background: rgba(76, 15, 28, 0.4); }

.tool-note { font-size: 0.8rem; color: var(--muted-2); line-height: 1.7; }
.tool-note strong { color: var(--muted); }

/* ---------- stargazing ---------- */
.sky-card { padding: 1.4rem; }
.sky-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 0.5rem 0 0.5rem; }
.sky-card p { font-size: 0.87rem; color: var(--muted); line-height: 1.7; margin: 0 0 0.9rem; }
.sky-foot { font-family: var(--font-mono); font-size: 0.68rem; color: var(--cyan); border-top: 1px solid rgba(30, 41, 59, 0.6); padding-top: 0.8rem; }

.season-pills { display: flex; gap: 0.6rem; flex-wrap: wrap; justify-content: center; margin: 1.5rem 0 2rem; }
.season-panel { display: none; }
.season-panel.active { display: grid; }

.gradient-banner { border-radius: var(--radius-lg); padding: 2.5rem 1.5rem; background: linear-gradient(135deg, rgba(8, 51, 68, 0.6), rgba(46, 28, 96, 0.45)); border: 1px solid rgba(34, 211, 238, 0.25); }
@media (min-width: 640px) { .gradient-banner { padding: 3rem 2.5rem; } }

/* ---------- footer ---------- */
.site-footer { background: #020617; border-top: 1px solid rgba(30, 41, 59, 0.8); margin-top: 5rem; position: relative; z-index: 10; font-size: 0.875rem; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2.5rem; max-width: 80rem; margin: 0 auto; padding: 4rem 1rem; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; padding-left: 2rem; padding-right: 2rem; } }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em; color: #e2e8f0; font-weight: 600; margin: 0 0 1rem; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.65rem; font-size: 0.78rem; }
.footer-col a { color: var(--muted); transition: color 0.15s; }
.footer-col a:hover { color: #a5f3fc; }
.footer-col a.accent { color: var(--cyan); font-weight: 500; }
.footer-tagline { color: #cbd5e1; font-weight: 500; font-size: 0.875rem; margin: 1rem 0 0.6rem; }
.footer-desc { font-size: 0.75rem; line-height: 1.7; max-width: 22rem; margin: 0; }
.footer-domain { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--cyan); padding-top: 0.5rem; }
.pulse-dot { width: 0.5rem; height: 0.5rem; border-radius: 999px; background: var(--cyan); animation: pulse 2s infinite; display: inline-block; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.footer-bottom { border-top: 1px solid #0f172a; }
.footer-bottom-inner { max-width: 80rem; margin: 0 auto; padding: 2rem 1rem; display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 1rem; font-size: 0.75rem; color: var(--muted-2); }
@media (min-width: 640px) { .footer-bottom-inner { flex-direction: row; } .footer-grid { padding-left: 1.5rem; padding-right: 1.5rem; } }
.footer-legal { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.footer-legal a { color: var(--muted-2); }
.footer-legal a:hover { color: #cbd5e1; }
.footer-copy { font-family: var(--font-mono); font-size: 0.68rem; }

/* ---------- pagination / misc ---------- */
.pagination { display: flex; gap: 0.5rem; justify-content: center; margin-top: 2.5rem; flex-wrap: wrap; }
.pagination a, .pagination span { font-family: var(--font-mono); font-size: 0.78rem; padding: 0.55rem 0.95rem; border-radius: 0.55rem; border: 1px solid var(--border); color: var(--muted); background: rgba(15, 23, 42, 0.6); }
.pagination a:hover { color: #fff; border-color: #475569; }
.pagination .current { background: rgba(8, 51, 68, 0.7); border-color: rgba(34, 211, 238, 0.5); color: #a5f3fc; }

.empty-state { text-align: center; padding: 3rem 1rem; color: var(--muted); }
.empty-state svg { width: 2.5rem; height: 2.5rem; color: var(--muted-2); margin: 0 auto 1rem; }

.admin-bar-spacer { height: 0; }

.screen-reader-text { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }

.wp-caption, .gallery-caption { font-size: 0.8rem; color: var(--muted-2); }

/* comment list */
.comment-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.comment-body { border: 1px solid var(--border); border-radius: 0.8rem; padding: 1.1rem 1.25rem; background: rgba(11, 17, 32, 0.6); }
.comment-meta { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.5rem; }
.comment-content p { color: #cbd5e1; font-size: 0.9rem; }

/* alignment for WP content */
.aligncenter { margin-left: auto; margin-right: auto; }

/* home: tools bar + admin card */
.tools-bar-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px) { .tools-bar-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .tools-bar-grid { grid-template-columns: repeat(4, 1fr); } }
.admin-card { display: flex; flex-direction: column; gap: 1.5rem; }
@media (min-width: 640px) { .admin-card { flex-direction: row; align-items: center; } }
.founder-row { display: flex; flex-direction: column; gap: 1.5rem; }
@media (min-width: 640px) { .founder-row { flex-direction: row; align-items: center; } }

/* JS-generated tool layouts */
.mp-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .mp-grid { grid-template-columns: 5fr 7fr; } }
.pa-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px) { .pa-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .pa-grid { grid-template-columns: repeat(4, 1fr); } }
.mag-grid { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 768px) { .mag-grid { grid-template-columns: repeat(2, 1fr); } }
.mag-result-row { display: flex; flex-direction: column; gap: 1rem; }
@media (min-width: 640px) { .mag-result-row { flex-direction: row; align-items: center; justify-content: space-between; } }
.preset-chip.active-chip { background: rgba(34, 211, 238, 0.15); color: #a5f3fc; border-color: rgba(34, 211, 238, 0.5); }
/* output-grid column modifiers (mobile-first) */
.tool-inputs.cols-1 { grid-template-columns: 1fr; }
@media (min-width: 640px) { .output-grid.cols-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px) { .output-grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.post-content p { color: #cbd5e1; line-height: 1.8; margin: 0 0 1.1rem; font-size: 0.98rem; }
.post-content h2, .post-content h3 { font-family: var(--font-display); color: #fff; margin: 2rem 0 1rem; }
.post-content ul, .post-content ol { color: #cbd5e1; }
.post-content a { color: var(--cyan); }