/* =============================================================================
   Deep-space observatory theme
   ============================================================================= */

:root {
  --bg-0:      #05060d;   /* deepest space */
  --bg-1:      #0a0d1a;
  --bg-2:      #111629;
  --panel:     rgba(20, 26, 48, 0.62);
  --panel-solid:#141a30;
  --border:    rgba(120, 150, 220, 0.16);
  --border-hi: rgba(140, 180, 255, 0.4);
  --text:      #e8ecf8;
  --text-dim:  #9aa6c4;
  --text-faint:#616d8c;
  --accent:    #7db4ff;   /* starlight blue */
  --accent-2:  #b98cff;   /* nebula violet  */
  --accent-3:  #ffcf6b;   /* star gold      */
  --good:      #6ee7a8;
  --warn:      #ffb454;
  --danger:    #ff6b81;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
}

/* Starfield background (pure CSS, layered radial gradients) */
body {
  background:
    radial-gradient(1200px 700px at 78% -8%, rgba(88,60,160,0.22), transparent 60%),
    radial-gradient(900px 600px at 12% 108%, rgba(30,80,160,0.18), transparent 60%),
    radial-gradient(700px 500px at 50% 40%, rgba(20,30,70,0.25), transparent 70%),
    var(--bg-0);
  background-attachment: fixed;
}
#starfield {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: 0.9;
}

.wrap { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 0 20px 80px; }

/* ---------- Header ---------- */
header.site {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 26px 4px 18px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo {
  width: 46px; height: 46px; border-radius: 50%;
  background:
     radial-gradient(circle at 32% 30%, #fff 0%, #ffe9b0 8%, #ffb454 22%, #7db4ff 55%, #3a2a7a 100%);
  box-shadow: 0 0 22px rgba(125,180,255,0.5), inset -6px -8px 14px rgba(0,0,0,0.5);
  flex: none;
}
.brand h1 {
  font-size: clamp(20px, 3.4vw, 30px); margin: 0; letter-spacing: 0.3px;
  font-weight: 700;
}
.brand h1 .sub { display:block; font-size: 12px; font-weight: 500; letter-spacing: 3px;
  color: var(--text-dim); text-transform: uppercase; margin-top: 2px; }

.clock {
  text-align: right; font-family: var(--mono); line-height: 1.4;
}
.clock .t { font-size: 20px; color: var(--text); }
.clock .d { font-size: 12px; color: var(--text-dim); }
.clock .loc { font-size: 12px; color: var(--accent); cursor: pointer; }
.clock .loc:hover { text-decoration: underline; }

/* ---------- Tab navigation ---------- */
nav.tabs {
  display: flex; gap: 6px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px; padding-bottom: 0;
}
nav.tabs button {
  background: none; border: none; color: var(--text-dim);
  font-family: var(--font); font-size: 15px; font-weight: 600;
  padding: 12px 16px; cursor: pointer; position: relative;
  border-radius: 8px 8px 0 0;
}
nav.tabs button:hover { color: var(--text); background: rgba(125,180,255,0.06); }
nav.tabs button.active { color: var(--text); }
nav.tabs button.active::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: -1px; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}

/* ---------- Panels / cards ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  backdrop-filter: blur(6px);
}
.grid { display: grid; gap: 18px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

.section-title { font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--text-dim); margin: 0 0 12px; font-weight: 700; }

.tab-page { display: none; animation: fade .35s ease; }
.tab-page.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px);} to {opacity:1; transform:none;} }

/* ---------- Sky map ---------- */
.sky-shell { position: relative; }
#skymap {
  display: block; width: 100%; height: auto;
  background: radial-gradient(circle at 50% 50%, #0a1030 0%, #05060d 78%);
  border-radius: 50%;
  border: 1px solid var(--border);
  box-shadow: 0 0 60px rgba(60,90,180,0.15), inset 0 0 60px rgba(0,0,0,0.6);
  touch-action: none;
}
.sky-controls { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 14px; }
.sky-controls .grow { flex: 1; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(125,180,255,0.08); border: 1px solid var(--border);
  color: var(--text-dim); padding: 7px 12px; border-radius: 999px;
  font-size: 13px; cursor: pointer; user-select: none;
}
.chip:hover { border-color: var(--border-hi); color: var(--text); }
.chip.on { color: var(--text); border-color: var(--border-hi); background: rgba(125,180,255,0.16); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

input[type=range] { -webkit-appearance: none; height: 4px; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); outline: none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px;
  border-radius: 50%; background: #fff; cursor: pointer; box-shadow: 0 0 8px rgba(125,180,255,0.9); }

.btn {
  background: rgba(125,180,255,0.1); border: 1px solid var(--border-hi);
  color: var(--text); padding: 8px 14px; border-radius: 10px; cursor: pointer;
  font-family: var(--font); font-size: 13px; font-weight: 600;
}
.btn:hover { background: rgba(125,180,255,0.2); }
.btn.small { padding: 5px 10px; font-size: 12px; }

/* Sky tooltip */
#sky-tip {
  position: absolute; pointer-events: none; z-index: 5;
  background: var(--panel-solid); border: 1px solid var(--border-hi);
  border-radius: 10px; padding: 8px 11px; font-size: 12.5px; color: var(--text);
  box-shadow: 0 8px 24px rgba(0,0,0,0.5); display: none; max-width: 220px;
}
#sky-tip .name { font-weight: 700; margin-bottom: 2px; }
#sky-tip .meta { color: var(--text-dim); font-size: 11.5px; }

/* ---------- Tonight panel ---------- */
.moon-wrap { display: flex; gap: 18px; align-items: center; }
#moon-canvas { flex: none; border-radius: 50%; box-shadow: 0 0 30px rgba(180,200,255,0.25); }
.kv { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.kv:last-child { border-bottom: none; }
.kv .k { color: var(--text-dim); }
.kv .v { color: var(--text); font-family: var(--mono); }

.body-row { display: grid; grid-template-columns: 26px 1fr auto auto; gap: 10px; align-items: center;
  padding: 9px 0; border-bottom: 1px solid var(--border); }
.body-row:last-child { border-bottom: none; }
.body-row .ico { width: 22px; height: 22px; border-radius: 50%; }
.body-row .nm { font-weight: 600; }
.body-row .st { font-size: 12px; color: var(--text-dim); }
.badge { font-size: 11px; padding: 3px 8px; border-radius: 999px; font-weight: 700; }
.badge.up { background: rgba(110,231,168,0.15); color: var(--good); }
.badge.down { background: rgba(255,107,129,0.12); color: var(--danger); }

/* ---------- Events ---------- */
.event {
  display: grid; grid-template-columns: 62px 1fr auto; gap: 14px; align-items: center;
  padding: 14px 12px; border-radius: 12px; border: 1px solid var(--border);
  margin-bottom: 10px; background: rgba(255,255,255,0.015);
}
.event:hover { border-color: var(--border-hi); }
.event .date { text-align: center; font-family: var(--mono); }
.event .date .d { font-size: 22px; font-weight: 700; line-height: 1; }
.event .date .m { font-size: 11px; color: var(--text-dim); text-transform: uppercase; }
.event .title { font-weight: 600; }
.event .desc { font-size: 13px; color: var(--text-dim); margin-top: 2px; }
.event .cd { font-family: var(--mono); font-size: 13px; color: var(--accent-3); text-align: right; white-space: nowrap; }
.event .emoji { font-size: 22px; }
.event-type { font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: var(--accent-2); font-weight: 700; }

/* ---------- ISS ---------- */
#iss-map-wrap { position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); }
#iss-canvas { display: block; width: 100%; height: auto; background: #071426; }
.iss-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 14px; }
.stat { text-align: center; padding: 12px 8px; border-radius: 12px; background: rgba(125,180,255,0.06); border: 1px solid var(--border); }
.stat .num { font-family: var(--mono); font-size: 20px; color: var(--text); }
.stat .lbl { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; margin-top: 3px; }
.pass { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 11px 0; border-bottom: 1px solid var(--border); }
.pass:last-child { border-bottom: none; }
.pass .when { font-weight: 600; }
.pass .info { font-size: 12px; color: var(--text-dim); }
.pass .dur { font-family: var(--mono); color: var(--accent-3); text-align: right; }

/* ---------- News / APOD ---------- */
.apod { display: grid; grid-template-columns: 1.2fr 1fr; gap: 22px; align-items: start; }
@media (max-width: 820px){ .apod { grid-template-columns: 1fr; } }
.apod img, .apod iframe { width: 100%; border-radius: 14px; border: 1px solid var(--border); aspect-ratio: 16/10; object-fit: cover; }
.apod .title { font-size: 22px; font-weight: 700; margin: 2px 0 8px; }
.apod .expl { font-size: 14px; line-height: 1.6; color: var(--text-dim); max-height: 340px; overflow: auto; }
.apod .credit { font-size: 12px; color: var(--text-faint); margin-top: 8px; }

.news-item { display: grid; grid-template-columns: 96px 1fr; gap: 14px; padding: 12px; border-radius: 12px;
  border: 1px solid var(--border); margin-bottom: 10px; text-decoration: none; color: inherit; }
.news-item:hover { border-color: var(--border-hi); background: rgba(125,180,255,0.05); }
.news-item img { width: 96px; height: 68px; object-fit: cover; border-radius: 8px; }
.news-item .h { font-weight: 600; font-size: 14.5px; line-height: 1.35; }
.news-item .s { font-size: 12px; color: var(--text-dim); margin-top: 5px; }
.news-item .src { color: var(--accent); }

/* ---------- Space Live: launches ---------- */
.launch { display: grid; grid-template-columns: 84px 1fr; gap: 14px; align-items: center;
  padding: 12px; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px;
  background: rgba(255,255,255,0.015); }
.launch:hover { border-color: var(--border-hi); }
.launch-img { width: 84px; height: 84px; object-fit: cover; border-radius: 10px; border: 1px solid var(--border); }
.launch-name { font-weight: 700; font-size: 15px; line-height: 1.3; }
.launch-meta { font-size: 12.5px; color: var(--text-dim); margin-top: 3px; }
.launch-when { font-size: 12.5px; color: var(--text); margin-top: 5px; }
.launch-cd { font-family: var(--mono); font-size: 20px; font-weight: 700; margin-top: 6px;
  color: var(--accent-3); letter-spacing: .5px; }
.launch-cd.go { color: var(--good); }

/* ---------- Space Live: the Sun ---------- */
.sun-viewer { text-align: center; }
#sun-img { width: 100%; max-width: 420px; aspect-ratio: 1; border-radius: 50%;
  border: 1px solid var(--border); background: #05060d;
  box-shadow: 0 0 50px rgba(255,180,90,0.28), inset 0 0 40px rgba(0,0,0,0.5); }
.sun-viewer .sky-controls { justify-content: center; }
#sun-activity { max-width: 360px; margin: 6px auto 0; text-align: left; }

/* ---------- Fact banner ---------- */
.factbar { display: flex; gap: 14px; align-items: center; padding: 16px 20px; border-radius: 14px;
  background: linear-gradient(100deg, rgba(122,92,255,0.14), rgba(125,180,255,0.06));
  border: 1px solid var(--border); margin-bottom: 22px; }
.factbar .spark { font-size: 26px; }
.factbar .txt { font-size: 15px; line-height: 1.5; }
.factbar .txt b { color: var(--accent-3); }
.factbar .next { margin-left: auto; }

/* ---------- misc ---------- */
.muted { color: var(--text-dim); }
.small { font-size: 12.5px; }
.loading { color: var(--text-dim); font-style: italic; padding: 20px; text-align: center; }
.err { color: var(--warn); font-size: 13px; padding: 10px 0; }
a { color: var(--accent); }
.spinner { display:inline-block; width:16px; height:16px; border:2px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent); border-radius:50%; animation: spin 0.8s linear infinite; vertical-align: -3px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Location picker modal ---------- */
.loc-modal { position: fixed; inset: 0; z-index: 50; background: rgba(3,4,10,0.72);
  backdrop-filter: blur(4px); display: flex; align-items: flex-start; justify-content: center; padding: 12vh 16px; }
.loc-modal[hidden] { display: none; }
.loc-box { position: relative; width: 100%; max-width: 440px; background: var(--panel-solid);
  border: 1px solid var(--border-hi); border-radius: 16px; padding: 22px;
  box-shadow: 0 24px 70px rgba(0,0,0,0.6); animation: fade .25s ease; }
.loc-x { position: absolute; top: 12px; right: 14px; background: none; border: none; color: var(--text-dim);
  font-size: 18px; cursor: pointer; }
.loc-x:hover { color: var(--text); }
.loc-title { font-size: 18px; font-weight: 700; }
.loc-search { display: flex; gap: 8px; }
.loc-search input { flex: 1; background: rgba(125,180,255,0.06); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; padding: 10px 12px; font-family: var(--font); font-size: 14px; outline: none; }
.loc-search input:focus { border-color: var(--border-hi); }
#loc-results { margin-top: 10px; display: grid; gap: 6px; }
.loc-result { text-align: left; background: rgba(125,180,255,0.05); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; padding: 10px 12px; cursor: pointer; font-family: var(--font); font-size: 14px; }
.loc-result:hover { border-color: var(--border-hi); background: rgba(125,180,255,0.14); }
.loc-current { border-top: 1px dashed var(--border); padding-top: 12px; }

/* ---------- Language toggle ---------- */
.lang-btn {
  background: rgba(125,180,255,0.1); border: 1px solid var(--border-hi);
  color: var(--text); padding: 6px 12px; border-radius: 999px; cursor: pointer;
  font-family: var(--font); font-size: 13px; font-weight: 700; letter-spacing: .3px;
}
.lang-btn:hover { background: rgba(125,180,255,0.2); }
.header-right { display: flex; align-items: center; gap: 14px; }

/* ---------- Quiz ---------- */
.quiz-card { background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 26px; max-width: 720px; margin: 0 auto; backdrop-filter: blur(6px); }
.quiz-center { text-align: center; }
.quiz-logo { font-size: 46px; margin-bottom: 6px; }
.quiz-h { font-size: 24px; margin: 6px 0 10px; }
.quiz-intro { color: var(--text-dim); font-size: 15px; line-height: 1.6; margin: 0 auto 20px; max-width: 520px; }
.quiz-start { font-size: 16px; padding: 12px 28px; border-radius: 12px;
  background: linear-gradient(100deg, rgba(122,92,255,0.3), rgba(125,180,255,0.25));
  border-color: var(--border-hi); }
.quiz-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.quiz-cat { font-size: 11px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase;
  color: var(--cc); border: 1px solid var(--cc); padding: 4px 10px; border-radius: 999px; opacity: .95; }
.quiz-progress { font-size: 13px; color: var(--text-dim); font-family: var(--mono); }
.quiz-scores { display: flex; gap: 18px; font-size: 13px; color: var(--text-dim); margin-bottom: 14px; }
.quiz-scores b { color: var(--text); }
.quiz-q { font-size: 20px; font-weight: 600; line-height: 1.4; margin: 6px 0 20px; }
.quiz-choices { display: grid; gap: 12px; }
.quiz-choice {
  text-align: left; background: rgba(125,180,255,0.06); border: 1px solid var(--border);
  color: var(--text); padding: 14px 16px; border-radius: 12px; cursor: pointer;
  font-family: var(--font); font-size: 15px; transition: all .15s ease;
}
.quiz-choice:hover:not(.locked) { border-color: var(--border-hi); background: rgba(125,180,255,0.14); transform: translateX(3px); }
.quiz-choice.locked { cursor: default; }
.quiz-choice.right { border-color: var(--good); background: rgba(110,231,168,0.16); color: #d6ffe8; }
.quiz-choice.wrong { border-color: var(--danger); background: rgba(255,107,129,0.14); color: #ffd9df; }
.quiz-feedback:empty { display: none; }
.quiz-feedback { margin-top: 18px; }
.quiz-verdict { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.quiz-verdict.ok { color: var(--good); }
.quiz-verdict.no { color: var(--warn); }
.quiz-exp { font-size: 14px; line-height: 1.6; color: var(--text-dim); }
.quiz-next { margin-top: 16px; }
.quiz-bigscore { font-size: 52px; font-weight: 800; font-family: var(--mono);
  background: linear-gradient(100deg, var(--accent-3), var(--accent-2)); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent; margin: 6px 0 10px; }
.quiz-actions { margin-top: 8px; display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.quiz-ghost { background: rgba(125,180,255,0.06); }

/* level picker */
.lvl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; max-width: 820px; margin: 0 auto; }
.lvl-card {
  text-align: left; cursor: pointer; color: var(--text);
  background: rgba(20,26,48,0.6); border: 1px solid var(--border);
  border-left: 4px solid var(--lc); border-radius: 14px; padding: 18px 18px 16px;
  font-family: var(--font); transition: all .16s ease;
}
.lvl-card:hover { transform: translateY(-3px); border-color: var(--lc);
  box-shadow: 0 10px 30px rgba(0,0,0,0.35), 0 0 0 1px var(--lc) inset; }
.lvl-emoji { font-size: 30px; margin-bottom: 8px; }
.lvl-name { font-size: 18px; font-weight: 700; color: var(--lc); margin-bottom: 4px; }
.lvl-desc { font-size: 13.5px; color: var(--text-dim); line-height: 1.45; margin-bottom: 12px; }
.lvl-meta { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: var(--text-faint);
  font-family: var(--mono); }
.quiz-lvl { font-size: 12px; font-weight: 800; letter-spacing: .5px; color: var(--lc);
  border: 1px solid var(--lc); padding: 4px 10px; border-radius: 999px; }
.quiz-onlevel { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  color: var(--lc); margin-bottom: 8px; }
.quiz-scores { display: flex; gap: 16px; }

footer.site { text-align:center; color: var(--text-faint); font-size: 12px; padding: 30px 0 10px; }