/* Paciente Virtual · Aula en directo, móvil del alumno (ADR 0021)
 * Pensado para un teléfono en una clase: botones enormes, un solo foco. */

:root {
  --bg: #070b0e; --s1: #121b21; --s2: #18242c; --s3: #1f2e37;
  --line: rgba(255,255,255,.08); --line-2: rgba(255,255,255,.14);
  --ink: #edf2f5; --ink-2: #b8c5cd; --muted: #7d8f9a;
  --accent: #2ee6a8; --accent-soft: rgba(46,230,168,.14); --warm: #ffcf8a; --danger: #ff6b6b;
  --c0: #ff6b6b; --c1: #4d9fff; --c2: #f2b53c; --c3: #2ee6a8;
  --display: "Sora", "Inter", system-ui, sans-serif; --font: "Inter", system-ui, sans-serif; --mono: "IBM Plex Mono", ui-monospace, monospace;
  --r: 16px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { color-scheme: dark; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.5; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; min-height: 100vh; }
h1, h2, p { margin: 0; }
.display { font-family: var(--display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; }
.eyebrow { font-family: var(--display); font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .18em; color: var(--accent); margin-bottom: .5rem; }
.small { font-size: .84rem; }
.muted { color: var(--muted); }
.lead { color: var(--ink-2); font-size: 1.02rem; }

.top { display: flex; justify-content: space-between; align-items: center; padding: .7rem 1rem; border-bottom: 1px solid var(--line); background: rgba(7,11,14,.85); position: sticky; top: 0; z-index: 2; }
.brand { display: flex; align-items: center; gap: .5rem; font-size: .95rem; color: var(--ink-2); }
.brand strong { color: var(--ink); }
.brand-mark { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft), 0 0 14px var(--accent); }
.top-right { font-family: var(--display); font-weight: 600; font-size: .9rem; color: var(--accent); }

main { max-width: 560px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.screen h1 { font-size: 2rem; margin-bottom: .5rem; }
form { display: grid; gap: .5rem; margin-top: 1.2rem; }
label { font-family: var(--display); font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-top: .5rem; }
input, textarea { width: 100%; font: inherit; color: var(--ink); background: var(--s2); border: 1px solid var(--line-2); border-radius: 12px; padding: .8rem .9rem; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.code-input { font-family: var(--mono); font-size: 1.8rem; letter-spacing: .3em; text-align: center; text-transform: uppercase; }
.btn { font: inherit; font-weight: 600; color: var(--ink); background: var(--s2); border: 1px solid var(--line-2); border-radius: 12px; padding: .8rem 1.1rem; cursor: pointer; }
.btn.primary { background: var(--accent); color: #05231a; border-color: transparent; }
.btn.xl { font-size: 1.1rem; padding: 1rem 1.2rem; margin-top: .6rem; }
.form-error { color: var(--danger); font-size: .9rem; }
.legal-notice { color: var(--warm); border-left: 3px solid rgba(255,207,138,.6); padding: .4rem .7rem; margin-top: 1.5rem; line-height: 1.45; }

.status-bar { display: flex; flex-direction: column; gap: .1rem; margin-bottom: 1.2rem; }
.room-title { font-family: var(--display); font-weight: 700; font-size: 1.05rem; }
.panel { background: var(--s1); border: 1px solid var(--line-2); border-radius: var(--r); padding: 1.3rem 1.1rem 1.4rem; }
.panel.wait { text-align: center; padding-top: 2.4rem; }
.pulse { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); margin: 0 auto 1.2rem; box-shadow: 0 0 0 0 rgba(46,230,168,.6); animation: pulse 1.8s ease-out infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(46,230,168,.6); } 100% { box-shadow: 0 0 0 26px rgba(46,230,168,0); } }
.panel.wait h2 { font-size: 1.6rem; margin-bottom: .4rem; }
.question { font-size: 1.45rem; margin-bottom: 1rem; }
.options { display: grid; gap: .6rem; }
.option { display: flex; align-items: center; gap: .8rem; width: 100%; text-align: left; font: inherit; font-weight: 600; font-size: 1.02rem; color: #fff; border: 0; border-radius: 14px; padding: 1rem .9rem; cursor: pointer; transition: transform .12s, filter .2s; min-height: 3.6rem; line-height: 1.25; }
.option:active { transform: scale(.98); }
.option.c0 { background: var(--c0); } .option.c1 { background: var(--c1); } .option.c2 { background: var(--c2); color: #2a1a00; } .option.c3 { background: var(--c3); color: #05231a; }
.option:disabled { filter: saturate(.4) brightness(.7); cursor: default; }
.option.mine { outline: 4px solid #fff; outline-offset: -4px; filter: none; }
.option.mine::after { content: "✓"; margin-left: auto; font-size: 1.3rem; }
.option-letter { font-family: var(--display); font-weight: 800; font-size: 1.2rem; width: 2rem; height: 2rem; border-radius: 50%; background: rgba(0,0,0,.25); display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.text-form textarea { resize: none; font-size: 1.05rem; }
.round-status { margin-top: .8rem; color: var(--ink-2); font-size: .9rem; }
.panel.result { text-align: center; padding-top: 2rem; }
.panel.result h2 { font-size: 2rem; margin-bottom: .4rem; }
.panel.result h2.good { color: var(--accent); }
.panel.result h2.bad { color: var(--danger); }
.score { margin-top: .8rem; font-family: var(--mono); color: var(--warm); font-size: 1rem; }
.panel.closed { text-align: center; }
.panel.closed .btn { margin-top: 1rem; }
.error { position: fixed; left: 50%; bottom: 1.2rem; transform: translateX(-50%); background: var(--danger); color: #2a0808; padding: .6rem 1rem; border-radius: 10px; font-weight: 600; z-index: 9; max-width: 92vw; }
@media (prefers-reduced-motion: reduce) { .pulse { animation: none; } }