:root {
  --bg-base:        #040608;
  --bg-surface:     #080c14;
  --bg-card:        rgba(10, 16, 28, 0.72);
  --bg-card-hover:  rgba(16, 24, 40, 0.85);

  --accent-gold:    #ffd700;
  --accent-blue:    #82aaff;
  --text-primary:   #f0f4ff;
  --text-secondary: #8a9bca;
  --text-muted:     #4a5580;

  --border:         rgba(255, 255, 255, 0.08);
  --grad-hero:      linear-gradient(135deg, #0a0e1c 0%, #05070a 100%);
  --grad-primary:   linear-gradient(135deg, #82aaff 0%, #a282ff 100%);

  --sp-xs:  0.25rem; --sp-sm:  0.5rem; --sp-md:  1rem;
  --sp-lg:  1.5rem; --sp-xl:  2rem; --sp-2xl: 3rem;
  --r-sm:   6px; --r-md:   12px; --r-lg:   20px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.45);
  --font-sans: 'InterVariable', 'Inter', system-ui, sans-serif;
  --font-mono: 'InterVariable', 'Inter', system-ui, sans-serif;
}

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

/* Form controls do not inherit the page font: without this, buttons and inputs fall
   back to the browser's own control font instead of Inter. A class rule that names
   a font still wins. */
button, input, select, textarea { font-family: var(--font-sans); }
body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh; display: flex; flex-direction: column;
  background-image: 
    radial-gradient(1px 1px at 15% 25%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 35% 65%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 15%, rgba(255,255,255,0.5) 0%, transparent 100%),
    var(--grad-hero);
  background-attachment: fixed;
}

.mono { font-family: var(--font-mono); letter-spacing: 0.04em; }

.main-container {
  max-width: 680px; margin: 0 auto;
  padding: var(--sp-md) var(--sp-md) var(--sp-2xl);
  display: flex; flex-direction: column; gap: var(--sp-lg);
  flex: 1;
}

/* Header */
.site-header { position: relative; text-align: center; padding: var(--sp-2xl) var(--sp-md) var(--sp-xl); }
.header-glow { position: absolute; inset: 0; background: radial-gradient(ellipse 60% 70% at 50% 30%, rgba(130,170,255,0.08) 0%, transparent 70%); pointer-events: none; }
.header-content { position: relative; display: flex; flex-direction: column; align-items: center; gap: var(--sp-md); }
.star-icon { width: 80px; height: 80px; filter: drop-shadow(0 0 18px rgba(130,170,255,0.3)); color: #fff; }
.header-text h1 { font-size: clamp(2rem, 6vw, 3.2rem); font-weight: 700; background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tagline { color: var(--text-secondary); font-size: 0.95rem; font-weight: 400; letter-spacing: 0.06em; text-transform: uppercase; margin-top: var(--sp-xs); }

/* Card */
.card {
  background: var(--bg-card); backdrop-filter: blur(16px);
  border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: var(--sp-xl); box-shadow: var(--shadow-card); position: relative;
}
.card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent); }

/* Forms */
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-md); }
.field-group { display: flex; flex-direction: column; gap: var(--sp-xs); margin-bottom: var(--sp-md); }
label { font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); letter-spacing: 0.04em; text-transform: uppercase; }
.text-input { width: 100%; padding: 0.65rem 1rem; background: rgba(0,0,0,0.3); border: 1px solid var(--border); border-radius: var(--r-md); color: var(--text-primary); outline: none; }
.text-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(130,170,255,0.12); }
input[type="datetime-local"]::-webkit-calendar-picker-indicator { filter: invert(0.8) sepia(1) hue-rotate(180deg); cursor: pointer; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-sm); padding: 0.75rem 1.5rem; border: none; border-radius: var(--r-md); font-weight: 600; cursor: pointer; transition: transform 0.15s; }
.btn svg { width: 18px; height: 18px; }
.btn:active { transform: scale(0.97); }
.btn-primary { width: 100%; background: var(--grad-primary); color: #111; box-shadow: 0 4px 16px rgba(130,170,255,0.2); }
.btn-secondary { background: rgba(255,255,255,0.05); color: var(--text-primary); border: 1px solid var(--border); transition: background 0.2s; }
.btn-secondary:hover { background: rgba(255,255,255,0.15); }
.btn-live { background: rgba(130,170,255,0.1); color: var(--accent-blue); border: 1px solid rgba(130,170,255,0.3); transition: all 0.2s; }
.btn-live.active { background: rgba(130,170,255,0.25); box-shadow: 0 0 12px rgba(130,170,255,0.4); text-shadow: 0 0 8px rgba(130,170,255,0.8); }

.tools-group { align-items: flex-start; justify-content: flex-end; }
.tools-group .btn { width: 100%; padding: 0.65rem 1rem; }

.action-row { display: grid; grid-template-columns: 2fr 1.2fr; gap: var(--sp-md); margin-top: var(--sp-sm); }
@media (max-width: 480px) {
  .action-row { grid-template-columns: 1fr; }
}

/* Map */
.map-wrapper { position: relative; width: 100%; aspect-ratio: 1; margin: 0 auto; max-width: 600px; display: flex; justify-content: center; align-items: center; border-radius: 50%; overflow: hidden; background: radial-gradient(circle at center, #010408 0%, #060a12 100%); border: 1px solid rgba(255,255,255,0.05); }
.card-title { position: absolute; top: var(--sp-sm); left: var(--sp-sm); font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); z-index: 10; pointer-events: none; }
.card-title span { display: block; font-size: 0.7rem; font-weight: 400; color: var(--text-muted); text-transform: uppercase; }

.compass-marker { position: absolute; font-size: 1rem; font-weight: 700; color: rgba(255,255,255,0.5); z-index: 5; pointer-events: none; }
.marker-n { top: 10px; left: 50%; transform: translateX(-50%); }
.marker-s { bottom: 10px; left: 50%; transform: translateX(-50%); }
.marker-e { right: 10px; top: 50%; transform: translateY(-50%); }
.marker-w { left: 10px; top: 50%; transform: translateY(-50%); }

#starmap-canvas { width: 100%; height: 100%; display: block; z-index: 2; cursor: crosshair; }

.star-tooltip { position: absolute; background: rgba(0,0,0,0.8); backdrop-filter: blur(8px); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 4px 8px; font-size: 0.75rem; color: #fff; pointer-events: none; transform: translate(-50%, -100%); margin-top: -8px; z-index: 20; transition: opacity 0.1s; }

/* ---- App switcher carousel ---------------------------------------- */
/* Stormberry chrome, the MetadataScrubber design (2026-10). The track
   holds 10 identical sets of cards and slides by exactly one set
   (-10%), so the loop is seamless. Change the number of sets and the
   shift together. The page's own app is the last card of each set. */
.app-switcher-container {
  padding: 3rem 0;
  margin-top: 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
  line-height: 1.6;
  color-scheme: dark;
}

.switcher-title {
  margin: 0 0 1.5rem;
  padding: 0 1rem;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: var(--text-secondary);
}

.app-switcher-marquee {
  display: flex;
  width: 100%;
  overflow: hidden;
  padding: 0.5rem 1rem 1.5rem;
}

.app-switcher-track {
  display: flex;
  width: max-content;
  animation: marquee 32s linear infinite;
}

.app-switcher-marquee:hover .app-switcher-track,
.app-switcher-marquee:focus-within .app-switcher-track { animation-play-state: paused; }

@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-10%); }
}

.switcher-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-shrink: 0;
  margin-right: 1rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}

.switcher-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.45);
  color: var(--text-primary);
}

.switcher-card img {
  width: 32px;
  height: 32px;
  opacity: 0.9;
}

/* A visible focus ring on the dark chrome, whatever the page does elsewhere */
.app-switcher-container a:focus-visible,
.site-footer a:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* ---- Carousel and footer access (2026-10-10) ---------------------- */
/* The page's own app, the last card of every set, is marked for screen
   readers (aria-current) and for the eye (an accent border). */
.switcher-card[aria-current="page"] { border-color: var(--accent-blue); }

/* Rounded focus ring, whatever corner radius the page's own ring uses */
.switcher-card:focus-visible { border-radius: 12px; }

/* Keyboard focus stops the slide and the row scrolls to the focused card,
   so it is never off-screen. :focus-visible and not :focus-within, so a
   mouse click does not move the card from under the pointer. */
.app-switcher-marquee:has(.switcher-card:focus-visible) { overflow-x: auto; }
.app-switcher-marquee:has(.switcher-card:focus-visible) .app-switcher-track { animation: none; }

/* The pause tick box (WCAG 2.2.2): ticked, the slide stops and the row
   scrolls by hand. Plain CSS, no script. `all: revert` keeps the page's
   own form styles off it. */
.app-switcher-container input.switcher-pause {
  all: revert;
  margin: 0 0.5rem 0.75rem 0;
  vertical-align: middle;
  accent-color: var(--accent-blue);
  cursor: pointer;
}

.app-switcher-container label.switcher-pause-label {
  all: revert;
  display: inline-block;
  margin-bottom: 0.75rem;
  vertical-align: middle;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
}

.app-switcher-container input.switcher-pause:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

.switcher-pause:checked ~ .app-switcher-marquee { overflow-x: auto; }
.switcher-pause:checked ~ .app-switcher-marquee .app-switcher-track { animation: none; }

/* A footer link never breaks inside itself (the org.nr. did at 320 px) */
.footer-bottom p a { white-space: nowrap; }

@media (prefers-reduced-motion: reduce) {
  /* Nothing slides, so there is nothing to pause. */
  .app-switcher-container input.switcher-pause,
  .app-switcher-container label.switcher-pause-label { display: none; }
}

/* ---- Footer -------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  padding: 4rem 1.5rem 2rem;
  background: var(--bg-base);
  border-top: 1px solid var(--border);
  line-height: 1.6;
}

.site-footer p { margin: 0; }

.footer-inner {
  max-width: 680px;
  margin: 0 auto 3rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.footer-brand { max-width: 320px; }

.footer-logo {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-family: inherit;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.footer-logo:hover { color: var(--text-primary); }
.footer-dot { background: linear-gradient(135deg, #E21E26, #FF4D54); -webkit-background-clip: text; background-clip: text; color: transparent; }

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

.footer-powered p {
  max-width: 250px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* Credit links read as links, as the legal links do */
.footer-powered a,
.footer-bottom p a {
  color: var(--accent-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 150ms ease;
}

.footer-powered a:hover,
.footer-bottom p a:hover { color: var(--text-primary); }

.footer-bottom {
  max-width: 680px;
  margin: 0 auto;
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

.footer-social { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.25rem; }
.footer-social a { color: var(--text-secondary); transition: color 150ms ease, transform 150ms ease; }
.footer-social a:hover { color: var(--text-primary); transform: translateY(-2px); }
.footer-social svg { display: block; }

.footer-bottom p { color: var(--text-secondary); font-size: 0.85rem; }

/* The public test of an app's privacy claim, where it makes one */
.footer-bottom .footer-offline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
}

.footer-privacy, .footer-ai { opacity: 0.85; }

@media (min-width: 720px) {
  .switcher-title { padding: 0 2rem; }
  .app-switcher-marquee { padding: 0.5rem 2rem 1.5rem; }
  .footer-powered p { text-align: right; }
}

@media (prefers-reduced-motion: reduce) {
  /* No sliding: the carousel becomes a row the reader scrolls. */
  .app-switcher-track { animation: none; }
  .app-switcher-marquee { overflow-x: auto; }
  .switcher-card,
  .footer-social a { transition: none; }
  .switcher-card:hover,
  .footer-social a:hover { transform: none; }
}

/* ASTROQUIZ SPECIFIC CSS */
.quiz-card {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 600px;
  margin: 0 auto;
}
.difficulty-selector {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}
.difficulty-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 1.1rem 0.75rem;
  min-height: 80px;
  background: rgba(240, 244, 255, 0.96);
  border: 2px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  color: #1a1f33;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.1;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}
.difficulty-btn:hover {
  background: #ffffff;
  border-color: rgba(162, 130, 255, 0.55);
  color: #0a0e1c;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}
.difficulty-btn.active {
  background: linear-gradient(135deg, #a282ff 0%, #7c5fe5 100%);
  border-color: rgba(162, 130, 255, 0.9);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow:
    0 0 0 3px rgba(162, 130, 255, 0.35),
    0 12px 28px rgba(124, 95, 229, 0.55);
}
.difficulty-btn.active:hover {
  background: linear-gradient(135deg, #b094ff 0%, #8b6ff0 100%);
  border-color: rgba(162, 130, 255, 1);
  color: #ffffff;
  transform: translateY(-3px);
}
.difficulty-name {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.difficulty-count {
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0.65;
  letter-spacing: 0.04em;
}
.difficulty-btn.active .difficulty-count {
  opacity: 0.92;
}
@media (max-width: 480px) {
  .difficulty-selector { grid-template-columns: repeat(2, 1fr); }
  .difficulty-btn { min-height: 72px; padding: 0.9rem 0.5rem; }
}
.score-board {
  display: flex;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.2);
  padding: 1rem 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-weight: 600;
  color: var(--accent-blue);
}
.question-header {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}
#question-text {
  font-size: 1.5rem;
  line-height: 1.4;
  margin-bottom: 2rem;
  color: var(--text-primary);
}
.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.option-btn {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  padding: 1rem 1.5rem;
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 1.1rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.option-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.3);
  transform: translateY(-2px);
}
.options-grid.disabled {
  pointer-events: none;
}
.option-btn.correct {
  background: rgba(160, 192, 255, 0.15);
  border-color: var(--accent-blue);
  color: #fff;
}
.option-btn.wrong {
  background: rgba(255, 107, 107, 0.15);
  border-color: #ff6b6b;
  color: #fff;
}
.feedback-hidden {
  display: none;
}
.feedback-visible {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeIn 0.4s ease-out forwards;
  margin-top: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
#feedback-text {
  font-size: 1.4rem;
  margin: 0;
}
#feedback-explanation {
  color: var(--text-secondary);
  line-height: 1.6;
}
#next-btn {
  align-self: flex-start;
  margin-top: 0.5rem;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Visible keyboard focus (WCAG 2.4.7) */
:focus-visible{outline:2px solid currentColor;outline-offset:2px;border-radius:4px}