/* Pizarra IA — cielo nocturno de clase */
:root {
  --night: #0B1533;
  --night-2: #12204A;
  --brand: #1E3A8A;
  --cyan: #22D3EE;
  --amber: #F5B841;
  --chalk: #EEF2FF;
  --mist: #A9B4D6;
  --ink: #1B2340;
  --panel: rgba(16, 27, 64, .92);
  --line: rgba(169, 180, 214, .22);
  --display: "Bricolage Grotesque", "Trebuchet MS", system-ui, sans-serif;
  --body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --r-sm: 10px;
  --r-lg: 22px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
html { background: var(--night); }
body {
  background: radial-gradient(ellipse at 50% 120%, #1B2E6B 0%, var(--night) 55%, #070D22 100%) fixed;
  color: var(--chalk);
  font: 17px/1.55 var(--body);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--cyan); }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

#sky { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }

/* ---------- botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  border: 1px solid var(--line); background: rgba(255,255,255,.06);
  padding: .55em 1em; border-radius: 999px; font-weight: 700; font-size: .92rem;
  transition: background .15s, border-color .15s, transform .15s;
  text-decoration: none; color: var(--chalk);
}
.btn:hover { background: rgba(255,255,255,.12); border-color: rgba(169,180,214,.5); }
.btn:active { transform: scale(.97); }
.btn-solid { background: var(--amber); color: var(--ink); border-color: var(--amber); }
.btn-solid:hover { background: #FFC85E; border-color: #FFC85E; }
.btn-cyan { background: var(--cyan); color: var(--ink); border-color: var(--cyan); }
.btn-cyan:hover { background: #67E8F9; }
.btn-ghost { background: transparent; }
.btn[disabled] { opacity: .45; pointer-events: none; }
.icon { width: 1.1em; height: 1.1em; flex: none; }

/* ---------- inicio ---------- */
.home { position: relative; z-index: 1; min-height: 100%; display: grid; grid-template-rows: auto 1fr auto; padding: 24px clamp(16px, 4vw, 48px); }
.home-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.brandmark { display: flex; align-items: center; gap: 10px; font: 800 1.05rem var(--display); letter-spacing: -.01em; }
.brandmark img { height: 34px; }
.provider { font-size: .82rem; color: var(--mist); }
.provider b { color: var(--chalk); font-weight: 700; }
.hero { align-self: center; max-width: 980px; width: 100%; margin: 0 auto; padding: 6vh 0 4vh; }
.hero h1 {
  font: 800 clamp(2.4rem, 6.4vw, 5.2rem)/0.98 var(--display);
  letter-spacing: -.035em; margin: 0 0 .35em; max-width: 13ch;
}
.hero p.lede { color: var(--mist); font-size: 1.15rem; max-width: 52ch; margin: 0 0 1.8em; }
.ask {
  display: flex; gap: 10px; align-items: center;
  background: rgba(255,255,255,.07); border: 1px solid var(--line);
  border-radius: 999px; padding: 8px 8px 8px 24px; max-width: 720px;
  box-shadow: 0 0 0 0 rgba(34,211,238,0); transition: box-shadow .2s, border-color .2s;
}
.ask:focus-within { border-color: var(--cyan); box-shadow: 0 0 0 6px rgba(34,211,238,.12); }
.ask input { flex: 1; min-width: 0; background: none; border: 0; outline: 0; font-size: 1.25rem; padding: 10px 0; }
.ask input::placeholder { color: #7F8BB3; }
.ask .btn { padding: .8em 1.4em; font-size: 1rem; }
.planets { margin-top: 3.2em; }
.planets h2 { font: 700 1rem var(--display); color: var(--mist); margin: 0 0 1em; }
.planet-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(178px, 1fr)); gap: 14px; }
.planet {
  position: relative; text-align: left; border: 1px solid var(--line); background: rgba(10,18,46,.55);
  border-radius: var(--r-lg); padding: 18px 18px 16px; overflow: hidden; color: var(--chalk);
  text-decoration: none; transition: border-color .2s, transform .2s;
}
.planet::before {
  content: ""; position: absolute; width: 120px; height: 120px; right: -40px; top: -40px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, color-mix(in srgb, var(--c) 85%, white), var(--c) 45%, color-mix(in srgb, var(--c) 30%, var(--night)) 100%);
  opacity: .85; transition: transform .35s;
}
.planet:hover { border-color: var(--c); transform: translateY(-3px); }
.planet:hover::before { transform: scale(1.12); }
.planet .emoji { position: relative; font-size: 1.6rem; }
.planet strong { position: relative; display: block; font: 800 1.15rem/1.15 var(--display); margin: .5em 0 .3em; max-width: 9ch; }
.planet span { position: relative; font-size: .84rem; color: var(--mist); }
.home-foot { color: #6F7CA6; font-size: .82rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* ---------- pizarra ---------- */
.board { position: fixed; inset: 0; z-index: 1; overflow: hidden; }
.topbar {
  position: absolute; z-index: 20; top: 0; left: 0; right: 0;
  display: flex; align-items: center; gap: 10px; padding: 14px 18px;
  background: linear-gradient(to bottom, rgba(7,13,34,.85), rgba(7,13,34,0));
}
.topbar .crumbs { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: .9rem; min-width: 0; }
.crumbs button { background: none; border: 0; color: var(--mist); padding: 2px 4px; }
.crumbs button:hover { color: var(--chalk); text-decoration: underline; }
.crumbs .sep { color: #56638F; }
.topbar .spacer { flex: 1; }
.topbar .tools { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

#field { position: absolute; inset: 0; }
#links { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

.core {
  position: absolute; left: 50%; top: 50%; z-index: 5;
  width: clamp(150px, 19vmin, 220px); aspect-ratio: 1; transform: translate(-50%, -50%);
  border-radius: 50%; display: grid; place-items: center; text-align: center; padding: 18px;
  background: radial-gradient(circle at 34% 30%, #4F74E8 0%, var(--brand) 42%, #0F1E52 100%);
  box-shadow: 0 0 0 10px rgba(30,58,138,.18), 0 0 90px 10px rgba(79,116,232,.35);
}
.core h1 { margin: 0; font: 800 clamp(1.05rem, 2.5vmin, 1.5rem)/1.05 var(--display); letter-spacing: -.02em; }
.summary {
  position: absolute; z-index: 19; top: 74px; left: 20px; max-width: min(380px, 40vw); margin: 0;
  color: var(--mist); font-size: .92rem; line-height: 1.45;
}
.summary:empty { display: none; }

.star {
  position: absolute; left: 0; top: 0; z-index: 6;
  display: flex; align-items: center; gap: 9px; white-space: nowrap;
  border: 0; background: none; color: var(--chalk); padding: 6px 12px 6px 6px; border-radius: 999px;
  font-weight: 700; will-change: transform; transition: background .2s, opacity .3s, filter .3s;
}
.star .dot {
  width: var(--s, 14px); height: var(--s, 14px); border-radius: 50%; flex: none;
  background: var(--g, var(--cyan)); box-shadow: 0 0 14px 2px var(--g, var(--cyan));
  transition: transform .25s;
}
.star .label { font-size: var(--fs, 1rem); text-shadow: 0 1px 8px rgba(0,0,0,.6); }
.star:hover, .star:focus-visible { background: rgba(255,255,255,.1); z-index: 9; }
.star:hover .dot { transform: scale(1.4); }
.star.captured .dot { background: var(--amber); box-shadow: 0 0 18px 4px rgba(245,184,65,.8); }
.star.captured .label::after { content: " ✓"; color: var(--amber); }
.star.dim { opacity: .22; filter: blur(.5px); }
.star.active { background: rgba(245,184,65,.18); z-index: 10; }
.star .votes {
  font-size: .72rem; background: var(--cyan); color: var(--ink); border-radius: 999px; padding: 1px 7px; font-weight: 800;
}
.star .votes:empty { display: none; }

.legend {
  position: absolute; z-index: 20; left: 18px; bottom: 18px; display: flex; flex-wrap: wrap; gap: 6px; max-width: min(60vw, 640px);
}
.legend button {
  border: 1px solid var(--line); background: rgba(7,13,34,.65); border-radius: 999px; padding: 4px 11px 4px 8px;
  font-size: .8rem; color: var(--mist); display: inline-flex; align-items: center; gap: 6px;
}
.legend button i { width: 9px; height: 9px; border-radius: 50%; background: var(--g); }
.legend button[aria-pressed="true"] { color: var(--chalk); border-color: var(--g); }

/* bandeja de la constelación */
.tray-toggle {
  position: absolute; z-index: 21; right: 18px; bottom: 18px;
  display: flex; align-items: center; gap: 10px; padding: 10px 16px 10px 12px;
  border-radius: 999px; border: 1px solid rgba(245,184,65,.5); background: rgba(7,13,34,.8); color: var(--chalk); font-weight: 700;
}
.tray-toggle .count {
  min-width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  background: var(--amber); color: var(--ink); font-weight: 800;
}

/* paneles laterales */
.sheet {
  position: absolute; z-index: 30; top: 0; right: 0; bottom: 0; width: min(520px, 100%);
  background: var(--panel); backdrop-filter: blur(14px); border-left: 1px solid var(--line);
  display: flex; flex-direction: column; transform: translateX(105%);
}
.sheet[hidden] { display: none; }
.sheet-head { display: flex; align-items: flex-start; gap: 12px; padding: 22px 24px 12px; }
.sheet-head h2 { margin: 0; font: 800 clamp(1.6rem, 3vw, 2.1rem)/1.05 var(--display); letter-spacing: -.02em; flex: 1; }
.sheet-head .from { display: block; font: 600 .82rem var(--body); color: var(--cyan); margin-bottom: 6px; letter-spacing: 0; }
.close { border: 0; background: rgba(255,255,255,.08); width: 38px; height: 38px; border-radius: 50%; flex: none; font-size: 1.2rem; }
.sheet-body { overflow: auto; padding: 4px 24px 28px; flex: 1; }
.sheet-actions { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 24px 14px; }

.def { font-size: 1.12rem; line-height: 1.6; margin: .4em 0 1.2em; }
.keypoints { list-style: none; padding: 0; margin: 0 0 1.4em; display: grid; gap: 8px; }
.keypoints li { position: relative; padding-left: 22px; color: #D9E0F7; }
.keypoints li::before { content: ""; position: absolute; left: 4px; top: .62em; width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }
.facet { border-radius: var(--r-sm); padding: 14px 16px; margin-bottom: 12px; background: rgba(255,255,255,.05); border-left: 4px solid var(--c); }
.facet h3 { margin: 0 0 4px; font: 700 .9rem var(--display); color: var(--c); }
.facet p { margin: 0; color: #D9E0F7; }
.quiz { margin-top: 1.4em; border: 1px dashed rgba(34,211,238,.45); border-radius: var(--r-lg); padding: 16px; }
.quiz h3 { margin: 0 0 10px; font: 800 1.05rem var(--display); }
.quiz .opts { display: grid; gap: 8px; }
.quiz .opt {
  text-align: left; border: 1px solid var(--line); background: rgba(255,255,255,.04); border-radius: var(--r-sm);
  padding: 10px 12px; display: flex; gap: 10px; align-items: center; position: relative; overflow: hidden;
}
.quiz .opt b { width: 26px; height: 26px; flex: none; border-radius: 50%; display: grid; place-items: center; background: rgba(255,255,255,.1); font-size: .85rem; }
.quiz .opt .bar { position: absolute; left: 0; top: 0; bottom: 0; background: rgba(34,211,238,.14); width: 0; transition: width .4s; z-index: 0; }
.quiz .opt > *:not(.bar) { position: relative; z-index: 1; }
.quiz .opt .n { margin-left: auto; font-size: .8rem; color: var(--cyan); }
.quiz .opt.right { border-color: #34D399; background: rgba(52,211,153,.14); }
.quiz .opt.wrong { border-color: #F87171; background: rgba(248,113,113,.12); }
.quiz .explain { margin: 10px 0 0; color: #D9E0F7; font-size: .95rem; }
.related { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 1.2em; }
.related button { border: 1px solid var(--line); background: none; border-radius: 999px; padding: 5px 12px; font-size: .88rem; }
.related button:hover { border-color: var(--cyan); color: var(--cyan); }
.muted { color: var(--mist); }
.section-title { font: 700 .95rem var(--display); color: var(--mist); margin: 1.6em 0 .6em; }

/* lista de la colección */
.collection { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.collection li {
  display: flex; align-items: center; gap: 10px; padding: 10px 10px 10px 14px;
  background: rgba(255,255,255,.05); border-radius: var(--r-sm); border: 1px solid transparent;
}
.collection li:focus-within { border-color: var(--line); }
.collection .t { flex: 1; min-width: 0; }
.collection .t strong { display: block; line-height: 1.25; }
.collection .t small { color: var(--mist); }
.collection .ord { color: var(--amber); font: 800 .9rem var(--display); width: 22px; text-align: right; }
.collection .mini { border: 0; background: rgba(255,255,255,.07); width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center; }
.collection .mini:hover { background: rgba(255,255,255,.15); }
.empty { text-align: center; padding: 30px 10px; color: var(--mist); }
.form-grid { display: grid; gap: 12px; margin-top: 1em; }
.field label { display: block; font-size: .85rem; color: var(--mist); margin-bottom: 4px; }
.field input[type=text] { width: 100%; background: rgba(255,255,255,.06); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 10px 12px; }
.field input[type=text]:focus { border-color: var(--cyan); outline: 0; }
.check { display: flex; gap: 10px; align-items: center; font-size: .95rem; }
.check input { width: 18px; height: 18px; accent-color: var(--amber); }

/* overlays */
.loading[hidden] { display: none; }
.loading {
  position: absolute; inset: 0; z-index: 15; display: grid; place-items: center; text-align: center; pointer-events: none;
}
.loading .orbit { width: 90px; height: 90px; margin: 0 auto 18px; border-radius: 50%; border: 2px solid rgba(169,180,214,.2); position: relative; animation: spin 1.6s linear infinite; }
.loading .orbit::after { content: ""; position: absolute; width: 14px; height: 14px; border-radius: 50%; background: var(--amber); top: -7px; left: 38px; box-shadow: 0 0 16px var(--amber); }
.loading p { font: 700 1.1rem var(--display); }
@keyframes spin { to { transform: rotate(360deg); } }
.toast {
  position: absolute; z-index: 50; left: 50%; bottom: 84px; transform: translateX(-50%);
  background: #FDE68A; color: var(--ink); padding: 10px 18px; border-radius: 999px; font-weight: 700; max-width: 90vw; text-align: center;
}
.toast.error { background: #FECACA; }
.modal-back { position: fixed; inset: 0; z-index: 60; background: rgba(4,8,22,.75); display: grid; place-items: center; padding: 16px; }
.modal-back[hidden] { display: none; }
.modal { background: var(--night-2); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 28px; width: min(520px, 100%); text-align: center; }
.modal h2 { font: 800 1.6rem var(--display); margin: 0 0 .3em; }
.code-big { font: 800 clamp(2.6rem, 9vw, 3.6rem)/1 var(--display); letter-spacing: .12em; color: var(--amber); margin: .3em 0; }
.qr { background: white; border-radius: 14px; padding: 12px; display: inline-block; margin: 10px 0; }
.qr img, .qr svg { display: block; width: 220px; height: 220px; }
.live-pill[hidden] { display: none; }
.live-pill { display: inline-flex; align-items: center; gap: 8px; background: rgba(34,211,238,.14); border: 1px solid rgba(34,211,238,.5); color: var(--chalk); border-radius: 999px; padding: 6px 12px; font-size: .85rem; font-weight: 700; }
.live-pill::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #34D399; box-shadow: 0 0 0 0 rgba(52,211,153,.7); animation: ping 1.8s infinite; }
@keyframes ping { 70% { box-shadow: 0 0 0 10px rgba(52,211,153,0); } 100% { box-shadow: 0 0 0 0 rgba(52,211,153,0); } }

/* modo proyector: textos más grandes */
body.projector .star .label { font-size: calc(var(--fs, 1rem) * 1.25); }
body.projector .def { font-size: 1.35rem; }
body.projector .sheet { width: min(640px, 100%); }

/* ---------- alumno (móvil) ---------- */
.student { position: relative; z-index: 1; max-width: 560px; margin: 0 auto; padding: 18px 16px 60px; }
.student header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.student h1 { font: 800 1.9rem/1.05 var(--display); margin: 0 0 .2em; letter-spacing: -.02em; }
.card { background: rgba(16,27,64,.85); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 18px; margin-bottom: 16px; }
.card h2 { font: 800 1.35rem/1.15 var(--display); margin: 0 0 .4em; }
.vote-list { display: flex; flex-wrap: wrap; gap: 8px; }
.vote-list button { border: 1px solid var(--line); background: rgba(255,255,255,.05); border-radius: 999px; padding: 8px 14px; font-weight: 700; }
.vote-list button[aria-pressed="true"] { background: var(--cyan); color: var(--ink); border-color: var(--cyan); }
.join-form { display: grid; gap: 12px; margin-top: 1em; }
.join-form input { text-align: center; font: 800 2.4rem var(--display); letter-spacing: .2em; background: rgba(255,255,255,.07); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 12px; }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .topbar { padding: 10px 12px; }
  .topbar .tools .btn .txt { display: none; }
  .legend, .summary { display: none; }
  .star { padding: 4px 8px 4px 4px; gap: 6px; }
  .star .label { font-size: calc(var(--fs, 1rem) * .82); }
  .star .dot { width: calc(var(--s, 14px) * .75); height: calc(var(--s, 14px) * .75); }
  .tray-toggle { right: 12px; bottom: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}