/* Chat coach ↔ alumno (app/ui/chat.js): pantalla completa encima de la app y del panel. */
/* Botón de la barra de arriba: borde con la gama neón de GIZE (azul, violeta, rosa y turquesa)
   girando, como «Iniciar entrenamiento», y un resplandor de esos colores. Compañero de la llama
   de la racha. Con mensajes sin leer brilla más y late despacio. */
.chat-btn { position: relative; isolation: isolate; flex: none; width: 36px; height: 36px; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--gize-r2) 12%, var(--gize-surface)); border: 0;
  color: #fff; cursor: pointer; -webkit-tap-highlight-color: transparent;
  box-shadow: -4px 0 14px -4px var(--gize-r1), 4px 0 14px -4px var(--gize-r3), 0 0 22px -6px var(--gize-r2),
    inset 0 0 10px color-mix(in srgb, var(--gize-r2) 30%, transparent);
  transition: box-shadow .4s, background .4s; }
.chat-btn::before { content: ""; position: absolute; inset: 0; padding: 1.5px; border-radius: inherit; pointer-events: none;
  background: conic-gradient(from var(--gize-angle), var(--gize-r1), var(--gize-r2), var(--gize-r3), var(--gize-r4), var(--gize-r1));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  animation: gize-spin 6s linear 2; } /* 2 vueltas y queda quieto: ahorra batería */
.chat-btn[hidden] { display: none; }
.chat-btn svg { width: 18px; height: 18px;
  filter: drop-shadow(0 0 3px color-mix(in srgb, var(--gize-r2) 90%, transparent)) drop-shadow(0 0 6px color-mix(in srgb, var(--gize-r1) 60%, transparent)); }
.chat-btn:active { transform: scale(.96); }
.chat-btn.unread { background: color-mix(in srgb, var(--gize-r2) 20%, var(--gize-surface)); animation: chatGlow 1.8s ease-in-out infinite; }
@keyframes chatGlow {
  0%, 100% { box-shadow: -4px 0 14px -4px var(--gize-r1), 4px 0 14px -4px var(--gize-r3), 0 0 22px -6px var(--gize-r2),
    inset 0 0 10px color-mix(in srgb, var(--gize-r2) 30%, transparent); }
  50% { box-shadow: -6px 0 22px -2px var(--gize-r1), 6px 0 22px -2px var(--gize-r3), 0 0 34px -4px var(--gize-r2),
    inset 0 0 14px color-mix(in srgb, var(--gize-r2) 45%, transparent); } }
html.lite .chat-btn::before { animation: none; }
@media (prefers-reduced-motion: reduce) { .chat-btn::before, .chat-btn.unread { animation: none; } }
.chat-btn .chat-badge { position: absolute; top: -4px; right: -4px; box-shadow: 0 0 8px color-mix(in srgb, var(--gize-danger) 70%, transparent); }
.chat-badge { display: inline-flex; align-items: center; justify-content: center; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 999px;
  background: var(--gize-danger); color: #fff; font: 700 11px var(--gize-font); line-height: 1; vertical-align: 2px; margin-left: 6px; }
.chat-btn .chat-badge { margin: 0; }
.chat-badge[hidden] { display: none; }

body.chat-open, html.chat-open { overflow: hidden; overscroll-behavior: none; }
/* El chat tapa todo (también la barra de abajo) y no deja pasar el scroll a la pantalla de atrás. */
.ch-ov { position: fixed; inset: 0 0 auto 0; height: 100vh; height: 100dvh; z-index: 400; overscroll-behavior: none; touch-action: pan-y; display: flex; flex-direction: column; background: var(--gize-bg);
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom); animation: chIn var(--duration-standard) var(--ease-drawer); }
@keyframes chIn { from { transform: translateY(24px); opacity: 0; } to { transform: none; opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .ch-ov { animation: none; } }

.ch-head { flex: none; display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--gize-border); background: var(--gize-surface); }
.ch-back { width: 40px; height: 40px; border-radius: 999px; border: 0; background: transparent; color: var(--gize-text); font-size: 30px; line-height: 1; cursor: pointer; }
.ch-who { min-width: 0; }
.ch-name { font-weight: 700; font-size: var(--text-emphasis); color: var(--gize-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ch-sub { font-size: var(--text-meta); color: var(--gize-text-2); }

.ch-list { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; padding: 12px 12px 6px;
  display: flex; flex-direction: column; gap: 6px; max-width: 760px; width: 100%; margin: 0 auto; box-sizing: border-box; }
.ch-day { align-self: center; margin: 8px 0 4px; padding: 3px 10px; border-radius: 999px; font-size: 11px; color: var(--gize-text-2);
  background: var(--gize-surface); border: 1px solid var(--gize-border); }
.ch-empty, .ch-err { margin: auto 12px; text-align: center; color: var(--gize-text-2); font-size: var(--text-body); line-height: 1.45; }
.ch-err { margin: 0 0 8px; color: var(--gize-danger); }

.ch-msg { max-width: 80%; padding: 8px 11px 5px; border-radius: 16px; font-size: var(--text-body); line-height: 1.4; word-wrap: break-word; overflow-wrap: anywhere; }
.ch-msg.them { align-self: flex-start; background: var(--gize-surface); border: 1px solid var(--gize-border); color: var(--gize-text); border-bottom-left-radius: 5px; }
.ch-msg.me { align-self: flex-end; border: 1px solid transparent;
  background: linear-gradient(color-mix(in srgb, var(--gize-r2) 16%, var(--gize-surface)), color-mix(in srgb, var(--gize-r2) 16%, var(--gize-surface))) padding-box,
    linear-gradient(120deg, var(--gize-r1), var(--gize-r2) 45%, var(--gize-r3)) border-box;
  color: var(--gize-text); border-bottom-right-radius: 5px; }
.ch-msg.failed { border-color: var(--gize-danger); }
.ch-txt { white-space: pre-wrap; }
.ch-meta { margin-top: 2px; font-size: 10.5px; color: var(--gize-text-2); text-align: right; font-variant-numeric: tabular-nums; }
.ch-seen { color: color-mix(in srgb, var(--gize-r2) 55%, #fff); font-weight: 600; }
/* «⋯» al lado de la hora de un mensaje recibido: «Reportar mensaje» y «Bloquear a …»
   (app/ui/bloquear.js). Chico y apagado, con más lugar para el dedo del que se ve. */
.ch-msg.them .ch-meta { display: flex; align-items: center; justify-content: flex-end; gap: 2px; }
.ch-more { position: relative; flex: none; display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 18px; margin: -3px -7px -3px 0;
  padding: 0; border: 0; border-radius: 999px; background: transparent; color: var(--gize-text-2); font: 700 14px/1 var(--gize-font); cursor: pointer;
  -webkit-tap-highlight-color: transparent; }
.ch-more::after { content: ""; position: absolute; inset: -10px -4px; }
.ch-more:active { background: color-mix(in srgb, var(--gize-text) 12%, transparent); }
.ch-fail { color: var(--gize-danger); }

.ch-audio { display: flex; align-items: center; gap: 8px; min-width: 190px; padding: 2px 0; }
.ch-play { flex: none; width: 34px; height: 34px; border-radius: 999px; border: 0; background: linear-gradient(120deg, var(--gize-r1), var(--gize-r2) 45%, var(--gize-r3)); color: #fff; display: inline-flex;
  align-items: center; justify-content: center; cursor: pointer; }
.ch-play svg { width: 15px; height: 15px; }
.ch-play:disabled { opacity: .5; }
.ch-prog { flex: 1; height: 4px; border-radius: 999px; background: color-mix(in srgb, var(--gize-text) 18%, transparent); overflow: hidden; }
.ch-prog i { display: block; height: 100%; width: 0; background: linear-gradient(120deg, var(--gize-r1), var(--gize-r2) 45%, var(--gize-r3)); border-radius: inherit; }
.ch-dur { flex: none; font-size: 12px; color: var(--gize-text-2); font-variant-numeric: tabular-nums; min-width: 32px; text-align: right; }

.ch-bar { flex: none; display: flex; align-items: flex-end; gap: 8px; padding: 8px 10px; border-top: 1px solid var(--gize-border); background: var(--gize-surface);
  max-width: 760px; width: 100%; margin: 0 auto; box-sizing: border-box; }
.ch-input { flex: 1; min-height: 42px; max-height: 120px; resize: none; padding: 10px 14px; border-radius: 21px; border: 1px solid var(--gize-border);
  background: var(--gize-surface-2); color: var(--gize-text); font: 16px/1.35 var(--gize-font); box-sizing: border-box; }
.ch-input:focus { outline: none; border-color: var(--gize-r2); box-shadow: var(--focus-ring); }
.ch-ic { flex: none; width: 42px; height: 42px; border-radius: 999px; border: 1px solid var(--gize-border); background: var(--gize-surface-2); color: var(--gize-text);
  display: inline-flex; align-items: center; justify-content: center; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.ch-ic svg { width: 20px; height: 20px; }
.ch-ic.on { background: linear-gradient(120deg, var(--gize-r1), var(--gize-r2) 45%, var(--gize-r3)); border-color: transparent; color: #fff; }
.ch-ic:active { transform: scale(.95); }

.ch-rec { flex: 1; display: flex; align-items: center; gap: 10px; min-height: 42px; }
.ch-rec-dot { width: 10px; height: 10px; border-radius: 999px; background: var(--gize-danger); animation: chBlink 1s infinite; }
@keyframes chBlink { 50% { opacity: .25; } }
.ch-rec-t { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--gize-text); }
.ch-rec-l { flex: 1; font-size: var(--text-meta); color: var(--gize-text-2); }
.ch-cancel { color: var(--gize-danger); }