/* ═══════════════════════════════════════════════════════════════════════
   GymBro — GymBot (chat.html). Tema oscuro estilo mensajería, mobile-first;
   en desktop se centra como columna de app (patrón del portal del socio).
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  --color-primary: #f97316;
  --color-primary-oscuro: #c2590f;
  --color-accent: #facc15;
  --oscuro: #0c111d;
  --oscuro-2: #131a2a;
  --oscuro-3: #1b2436;
  --texto-claro: #f4f6fa;
  --texto-suave: #98a1b3;
  --fuente: "Inter", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  font-family: var(--fuente);
  background: #060a12;
  color: var(--texto-claro);
  -webkit-font-smoothing: antialiased;
}

.chat-app {
  max-width: 520px;
  margin-inline: auto;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(700px 300px at 100% -5%, color-mix(in srgb, var(--color-primary) 14%, transparent), transparent 60%),
    var(--oscuro);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

/* ─── Header ──────────────────────────────────────────────────────────── */
.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(19, 26, 42, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  flex: 0 0 auto;
}
.chat-volver {
  color: var(--texto-suave);
  text-decoration: none;
  font-size: 1.25rem;
  padding: 4px 10px;
  border-radius: 8px;
}
.chat-volver:hover { background: rgba(255, 255, 255, 0.07); color: #fff; }
.chat-bot-avatar {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 50%;
  overflow: hidden;
  font-size: 1.2rem;
  background: color-mix(in srgb, var(--color-primary) 28%, transparent);
}
.chat-bot-avatar svg { width: 100%; height: 100%; display: block; }
.chat-header-info { flex: 1; min-width: 0; }
.chat-header-info strong { display: block; font-size: 0.98rem; }
.chat-header-info small { color: var(--exito, #4ade80); font-size: 0.74rem; }
.chat-header-info small::before { content: "● "; color: #4ade80; }
.chat-gym { font-size: 0.72rem; color: var(--texto-suave); font-weight: 700; text-align: right; }

/* ─── Banner visitante ────────────────────────────────────────────────── */
.chat-banner {
  padding: 10px 16px;
  background: color-mix(in srgb, var(--color-accent) 14%, var(--oscuro-2));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: #e5d9a8;
  flex: 0 0 auto;
}
.chat-banner a { color: var(--color-accent); font-weight: 700; }

/* ─── Mensajes ────────────────────────────────────────────────────────── */
.chat-mensajes {
  flex: 1;
  overflow-y: auto;
  padding: 18px 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.burbuja {
  max-width: 86%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
  animation: burbuja-entra 0.2s ease;
}
@keyframes burbuja-entra {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}
.burbuja.bot {
  align-self: flex-start;
  background: var(--oscuro-3);
  border-bottom-left-radius: 5px;
}
.burbuja.usuario {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-oscuro));
  border-bottom-right-radius: 5px;
}
.burbuja.error {
  align-self: center;
  background: rgba(220, 38, 38, 0.15);
  border: 1px solid rgba(220, 38, 38, 0.35);
  color: #fca5a5;
  font-size: 0.82rem;
  text-align: center;
}

.burbuja strong { font-weight: 800; }
.burbuja .folio {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  padding: 1px 7px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* typing indicator */
.escribiendo {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--oscuro-3);
  border-radius: 16px;
  border-bottom-left-radius: 5px;
  font-size: 0.8rem;
  color: var(--texto-suave);
}
.escribiendo .puntos { display: inline-flex; gap: 4px; }
.escribiendo .puntos span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--texto-suave);
  animation: punto-brinca 1.2s infinite;
}
.escribiendo .puntos span:nth-child(2) { animation-delay: 0.15s; }
.escribiendo .puntos span:nth-child(3) { animation-delay: 0.3s; }
@keyframes punto-brinca {
  0%, 60%, 100% { transform: none; opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* ─── Sugerencias ─────────────────────────────────────────────────────── */
.chat-sugerencias {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 16px;
  scrollbar-width: none;
  flex: 0 0 auto;
}
.chat-sugerencias::-webkit-scrollbar { display: none; }
.chip-sugerencia {
  flex: 0 0 auto;
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.16);
  color: var(--texto-suave);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}
.chip-sugerencia:hover { border-color: var(--color-primary); color: #fff; }

/* ─── Entrada ─────────────────────────────────────────────────────────── */
.chat-entrada {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: var(--oscuro-2);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  flex: 0 0 auto;
}
#chat-input {
  flex: 1;
  resize: none;
  max-height: 120px;
  background: var(--oscuro-3);
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  color: var(--texto-claro);
  font-family: inherit;
  font-size: 0.92rem;
  line-height: 1.45;
  padding: 11px 14px;
}
#chat-input:focus { outline: none; border-color: var(--color-primary); }
#chat-input::placeholder { color: var(--texto-suave); }

#chat-enviar {
  width: 44px; height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.05rem;
  cursor: pointer;
  flex: 0 0 auto;
  transition: background 0.15s ease, transform 0.1s ease;
}
#chat-enviar:hover { background: var(--color-primary-oscuro); }
#chat-enviar:active { transform: scale(0.94); }
#chat-enviar:disabled { opacity: 0.45; cursor: not-allowed; }