/* Tutor de pistas: un avatar constante, sin ocupar el espacio de respuesta. */
  .hint-tutor-fab{position:fixed;z-index:34;right:max(18px,calc((100vw - 1060px)/2));top:50%;display:grid;place-items:center;width:58px;height:58px;padding:0;border:3px solid #fff;border-radius:50%;background:linear-gradient(145deg,#8B5CF6,#6D3DE3);box-shadow:0 8px 22px rgba(109,61,227,.34),0 0 0 4px rgba(139,92,246,.13);cursor:pointer;transform:translateY(-50%);transition:transform .16s ease,box-shadow .16s ease}
  .hint-tutor-fab:hover{transform:translateY(-50%) scale(1.06);box-shadow:0 11px 26px rgba(109,61,227,.42),0 0 0 7px rgba(139,92,246,.13)}
  .hint-tutor-fab:focus-visible{outline:3px solid #2D6CDF;outline-offset:3px}
  .hint-tutor-avatar{display:grid;place-items:center;width:100%;height:100%;overflow:hidden;border-radius:50%;background:#F4EDFF}
  .hint-tutor-avatar img{width:100%;height:100%;object-fit:cover;object-position:50% 46%}
  .hint-tutor-badge{display:none}
  .hint-tutor-fab-label{position:absolute;right:calc(100% + 10px);width:max-content;padding:6px 8px;border-radius:8px;background:#30284B;color:#fff;font:.65rem/1 Nunito,sans-serif;font-weight:900;opacity:0;pointer-events:none;transform:translateX(4px);transition:opacity .16s ease,transform .16s ease}
  .hint-tutor-fab:hover .hint-tutor-fab-label,.hint-tutor-fab:focus-visible .hint-tutor-fab-label{opacity:1;transform:none}
  .hint-tutor-scrim{position:fixed;inset:0;z-index:39;background:rgba(35,28,54,.1);backdrop-filter:none}
  .hint-tutor-panel{position:fixed;z-index:40;right:max(18px,calc((100vw - 1080px)/2));top:50%;display:grid;grid-template-rows:auto minmax(0,1fr) auto;overflow:hidden;width:min(440px,calc(100vw - 40px));height:min(680px,calc(100dvh - 40px));max-height:min(680px,calc(100dvh - 40px));border:1px solid #E5DBF8;border-radius:20px;background:#fff;box-shadow:0 20px 50px rgba(45,31,78,.24);transform:translateY(-50%)}
  .hint-tutor-panel[hidden],.hint-tutor-scrim[hidden]{display:none}
  .hint-tutor-head{display:flex;align-items:center;gap:9px;padding:12px;border-bottom:1px solid #EEE8F7;background:linear-gradient(135deg,#FCFAFF,#F3EDFF)}
  .hint-tutor-head img{width:38px;height:38px;border-radius:50%;object-fit:cover;object-position:50% 46%;background:#F4EDFF}
  .hint-tutor-copy{min-width:0;flex:1}.hint-tutor-copy strong{display:block;color:#342C49;font-size:.84rem;line-height:1.15}.hint-tutor-copy span{display:block;margin-top:2px;color:#736A82;font-size:12px;font-weight:800}.hint-tutor-close{display:grid;place-items:center;width:30px;height:30px;border:0;border-radius:9px;background:#fff;color:#655B73;font-size:1.1rem;cursor:pointer}.hint-tutor-close:hover{background:#ECE4FB}
  .hint-tutor-feed{display:flex;min-height:0;max-height:none;flex-direction:column;gap:9px;padding:14px;overflow-y:auto}.hint-tutor-feed:has(.hint-tutor-message-row:first-child:last-child){justify-content:flex-start}.hint-tutor-message-row{display:flex;align-items:flex-end;gap:7px;max-width:100%}.hint-tutor-message-row.assistant{justify-content:flex-start}.hint-tutor-message-row.user{justify-content:flex-end}.hint-tutor-speaker{display:grid;place-items:center;flex:0 0 25px;width:25px;height:25px;overflow:hidden;border:1px solid #E9E1F5;border-radius:50%;background:#F4EEFF;color:#6547B3;font-size:12px;font-weight:1000;box-shadow:0 2px 6px rgba(74,55,105,.1)}.hint-tutor-speaker img{width:100%;height:100%;object-fit:cover;object-position:50% 46%}.hint-tutor-speaker.student{border-color:#DCEBD5;background:#EDF8E8;color:#37704A}.hint-tutor-msg.intro{padding:12px;border:1px solid #EEEAF5;border-radius:15px;background:#FAF8FE;color:#554C64;font-size:14px;line-height:1.45}.hint-tutor-msg{max-width:91%;padding:11px 12px;border-radius:16px;font-size:14px;line-height:1.5;white-space:pre-wrap}.hint-tutor-msg.user{align-self:flex-end;background:#EFF9E9;color:#345622}.hint-tutor-msg.assistant{align-self:flex-start;max-width:calc(100% - 32px);border:1px solid #ECE7F5;background:#FCFBFE;color:#433A55;box-shadow:0 5px 16px rgba(72,55,106,.055)}.hint-tutor-msg .katex-display{max-width:100%;margin:.42em 0;overflow-x:auto}.hint-tutor-msg.loading{color:#736A82;font-style:italic}.hint-tutor-line{margin:0}.hint-tutor-heading{margin:2px 0 4px;font-size:.69rem;font-weight:900;letter-spacing:.02em}.hint-tutor-heading.chat{color:#292531;font-size:.72rem;font-weight:1000}.hint-tutor-heading.idea{color:#6D56B8}.hint-tutor-heading.steps{color:#337454}.hint-tutor-heading.check{color:#9B6A1F}.hint-tutor-step{display:grid;grid-template-columns:18px minmax(0,1fr);align-items:start;gap:7px;margin:5px 0;padding:6px 8px;border:1px solid #F0EDF5;border-radius:10px;background:#FFFFFF}.hint-tutor-step-index{display:grid;place-items:center;width:18px;height:18px;border-radius:6px;background:#F1ECFF;color:#6D4AC6;font-size:.62rem;font-weight:900}.hint-tutor-msg strong{font-weight:900;color:#5633A8}.hint-tutor-msg .katex{font-size:1.02em}
  /* Patrón de conversación familiar, adaptado a la paleta y marca aiPAES. */
  .hint-tutor-feed{gap:7px;background-color:#F7F5F1;background-image:radial-gradient(rgba(112,96,133,.075) .7px,transparent .8px);background-size:13px 13px}.hint-tutor-message-row{gap:6px}.hint-tutor-message-row.assistant{align-items:flex-start;gap:2px}.hint-tutor-message-row.assistant .hint-tutor-speaker{margin-top:2px}.hint-tutor-speaker{flex-basis:23px;width:23px;height:23px;border:0;box-shadow:0 1px 4px rgba(51,43,67,.16)}.hint-tutor-speaker.student{box-shadow:0 1px 4px rgba(52,91,39,.15)}.hint-tutor-msg{position:relative;max-width:82%;padding:8px 10px;border-radius:8px 13px 13px 13px;font-size:14px;line-height:1.48}.hint-tutor-msg.intro{padding:9px 10px;border:0;border-radius:8px 13px 13px 13px;background:#fff;box-shadow:0 1px 2px rgba(43,35,55,.1)}.hint-tutor-msg.assistant{max-width:calc(100% - 29px);border:0;border-radius:8px 13px 13px 13px;background:#fff;box-shadow:0 1px 2px rgba(43,35,55,.1)}.hint-tutor-msg.user{max-width:calc(100% - 29px);border-radius:13px 8px 13px 13px;background:#DCF8C6;color:#284B26;box-shadow:0 1px 2px rgba(38,82,34,.1)}.hint-tutor-message-row.assistant .hint-tutor-msg::before{content:'';position:absolute;top:0;left:-6px;width:0;height:0;border-top:7px solid #fff;border-left:7px solid transparent}.hint-tutor-message-row.user .hint-tutor-msg::before{content:'';position:absolute;top:0;right:-6px;width:0;height:0;border-top:7px solid #DCF8C6;border-right:7px solid transparent}.hint-tutor-heading{margin:0 0 3px;font-size:.68rem}.hint-tutor-heading.chat{font-size:.71rem}.hint-tutor-step{margin:4px 0;padding:5px 7px;border:0;border-radius:8px;background:#F5F3FB}.hint-tutor-step-index{border-radius:50%;background:#EAE2FC}.hint-tutor-form{gap:7px;border-top:0;background:#F0F2F5}.hint-tutor-input{border:0;border-radius:22px;box-shadow:0 1px 2px rgba(43,35,55,.1)}.hint-tutor-input:focus{box-shadow:0 0 0 2px rgba(109,78,213,.22)}.hint-tutor-send{min-width:40px;height:40px;border-radius:50%;background:#58B611;box-shadow:0 2px 4px rgba(55,138,22,.24)}
  .hint-tutor-form{display:grid;grid-template-columns:minmax(0,1fr) 42px;align-items:end;gap:8px;padding:12px;border-top:1px solid #EEE8F7;background:#FBFAFE}.hint-tutor-input{min-width:0;min-height:40px;height:40px;max-height:96px;padding:10px 11px;border:1px solid #DDD3EF;border-radius:11px;background:#fff;color:#302A3B;font:inherit;font-size:14px;line-height:1.35;outline:0;resize:none}.hint-tutor-input:focus{border-color:#8B5CF6;box-shadow:0 0 0 3px rgba(139,92,246,.14)}.hint-tutor-send{min-width:42px;height:40px;border:0;border-radius:11px;background:#7C4DE0;color:#fff;font-weight:1000;cursor:pointer}.hint-tutor-send:disabled,.hint-tutor-input:disabled{opacity:.55;cursor:not-allowed}
  /* Desde un ancho de escritorio útil el tutor es un compañero de estudio
     permanente: se reserva la columna y nunca cubre la pregunta. */
  @media(min-width:1200px) and (min-height:480px){
    .exam-page{max-width:1280px;padding-right:322px}
    .hint-tutor-fab,.hint-tutor-scrim{display:block}
    .hint-tutor-panel{position:fixed;z-index:12;right:18px;top:var(--tutor-top,18px);bottom:auto;width:294px;height:var(--tutor-height,min(600px,calc(100dvh - var(--tutor-top,18px) - 18px)));max-height:600px;border-color:#E3D7FA;border-radius:22px;background:linear-gradient(180deg,#fff 0%,#FCFAFF 100%);box-shadow:0 16px 38px rgba(69,44,116,.15);transform:none}
    .hint-tutor-head{gap:10px;padding:14px;border-bottom-color:#EAE3F5;background:linear-gradient(135deg,#F7F2FF,#FEFCFF)}
    .hint-tutor-head img{width:46px;height:46px;box-shadow:0 3px 10px rgba(109,61,227,.17)}
    .hint-tutor-copy strong{font-size:.9rem}.hint-tutor-copy span{font-size:12px}.hint-tutor-close{display:none}
    .hint-tutor-feed{min-height:0;max-height:none;padding:16px 14px;gap:10px}.hint-tutor-msg.intro{padding:12px;font-size:14px}.hint-tutor-msg{font-size:14px}
    .hint-tutor-form{grid-template-columns:minmax(0,1fr) 44px;gap:8px;padding:12px}.hint-tutor-input{min-height:42px;height:42px}.hint-tutor-send{min-width:44px;height:42px}
  }
  @media(max-width:760px){.hint-tutor-fab{z-index:42;right:14px;top:auto;bottom:calc(78px + env(safe-area-inset-bottom));width:54px;height:54px;transform:none}.hint-tutor-fab:hover{transform:scale(1.04)}.hint-tutor-fab-label{display:none}.hint-tutor-panel{right:14px;left:auto;top:auto;bottom:calc(16px + env(safe-area-inset-bottom));width:min(360px,calc(100vw - 28px));height:min(72dvh,540px);max-height:calc(100dvh - 32px);border-radius:22px;box-shadow:0 16px 38px rgba(69,44,116,.2);transform:none}.hint-tutor-head{gap:7px;min-height:0;padding:7px 10px}.hint-tutor-head img,.hint-tutor-head::before{display:none}.hint-tutor-copy strong{font-size:14px;line-height:1.1}.hint-tutor-copy span{margin-top:1px;font-size:12px}.hint-tutor-close{width:26px;height:26px;border-radius:8px;font-size:.94rem}.hint-tutor-feed{max-height:none;padding:12px 14px;background-color:#FCFAFF;background-image:radial-gradient(rgba(126,96,180,.07) .7px,transparent .8px)}.hint-tutor-form{padding:10px 14px;background:#F7F3FC}.hint-tutor-send{background:#7C4DE0;box-shadow:0 2px 4px rgba(79,48,153,.22)}.hint-tutor-scrim{display:block}}
  @media(prefers-reduced-motion:reduce){.hint-tutor-fab,.hint-tutor-fab-label{transition:none}}

/* Shared by practice and diagnostic: readable chat and a reachable composer. */
.hint-tutor-panel,.hint-tutor-panel *{box-sizing:border-box}
.hint-tutor-panel{font-family:Nunito,system-ui,sans-serif;line-height:1.45}
.hint-tutor-msg{overflow-wrap:anywhere;min-width:0}
.hint-tutor-msg p{margin:0 0 6px}.hint-tutor-msg p:last-child{margin-bottom:0}
.hint-tutor-feed{overscroll-behavior:contain;scrollbar-width:thin}
.hint-tutor-footer{padding:14px;color:#736a82;font-size:13px;background:#fbfafe}
.hint-tutor-form{margin:0}.hint-tutor-input{font-size:16px}
.hint-tutor-send{font-size:22px}.hint-tutor-close{min-width:36px;min-height:36px}
.hint-tutor-fab[hidden],.hint-tutor-panel[hidden],.hint-tutor-scrim[hidden]{display:none!important}
.hint-tutor-fab-label{opacity:1;transform:none}
@media(max-width:1199px),(max-height:479px){
 .hint-tutor-panel{top:var(--tutor-modal-top,50%);height:var(--tutor-modal-height,min(680px,calc(100dvh - 32px)));max-height:calc(100dvh - 32px)}
 .hint-tutor-copy strong{font-size:16px}.hint-tutor-copy span{font-size:12px}
}
@media(max-width:760px){.hint-tutor-panel{left:12px;right:12px;width:auto;top:var(--tutor-modal-top,auto);transform:none}.hint-tutor-fab-label{display:block;font-size:12px}.hint-tutor-head{padding:10px}.hint-tutor-head img{display:block;width:34px;height:34px}}
.hint-tutor-input{height:46px;min-height:46px}
/* Ensayos expands with the question; scrolling belongs to the page. */
#exam[data-reader="false"]{height:auto;min-height:0;display:block;padding-bottom:24px}
#exam[data-reader="false"] .exam-layout{min-height:0}
#exam[data-reader="false"] .exam-card{height:auto;display:block;overflow:visible}
#exam[data-reader="false"] .standalone-question:not([hidden]){overflow:visible}
#exam .exam-actions{position:static;margin-top:16px}
.exam-toolbar .hint-tutor-fab{position:relative;inset:auto;width:36px;height:36px;transform:none;z-index:1;justify-self:end}
.exam-toolbar .hint-tutor-fab:hover{transform:scale(1.04)}
.exam-toolbar .hint-tutor-fab-label{display:none}
@media(max-width:1199px),(max-height:479px){.exam-toolbar{grid-template-columns:auto minmax(0,1fr) auto auto}.exam-toolbar .exam-center{justify-self:end}}

.hint-tutor-copy strong{font-size:15px}.hint-tutor-copy span{font-size:11px}.hint-tutor-heading{font-size:12px}
.hint-tutor-msg,.hint-tutor-msg.intro{font-size:13px;line-height:1.45}
@media(min-width:761px){.hint-tutor-input{font-size:14px}}

/* Shared animated avatar preserves existing image sizing and layout. */
.tutor-avatar-picture{display:contents}

/* Floating bubble is portaled to body so question-card transforms cannot trap it. */
@media(max-width:1199px),(max-height:479px){
 .hint-tutor-fab.tutor-mobile-bubble{position:fixed;z-index:38;right:auto;bottom:auto;width:56px;height:56px;transform:none;touch-action:none;user-select:none;-webkit-user-select:none;cursor:grab;transition:box-shadow .16s ease}
 .hint-tutor-fab.tutor-mobile-bubble:hover{transform:none}
 .tutor-mobile-bubble.is-dragging{cursor:grabbing;box-shadow:0 10px 28px rgba(109,61,227,.4)}
 .tutor-mobile-bubble img{pointer-events:none;-webkit-user-drag:none}
 .tutor-mobile-bubble .hint-tutor-fab-label{display:none}
}

/* The tutor uses one compact reading scale at every breakpoint. */
.hint-tutor-panel{--tutor-body:max(14px,.875rem);--tutor-label:max(12px,.75rem)}
.hint-tutor-panel .hint-tutor-copy strong{font-size:1rem;line-height:1.3}
.hint-tutor-panel .hint-tutor-copy span,.hint-tutor-panel .hint-tutor-heading{font-size:var(--tutor-label);line-height:1.4}
.hint-tutor-panel .hint-tutor-msg,.hint-tutor-panel .hint-tutor-msg.intro,.hint-tutor-panel .hint-tutor-msg p,.hint-tutor-panel .hint-tutor-footer{font-size:var(--tutor-body);line-height:1.5}
.hint-tutor-panel .hint-tutor-msg .katex{font-size:1em}
.hint-tutor-panel .hint-tutor-input{font-size:var(--tutor-body);line-height:1.4}
@media(max-width:760px){.hint-tutor-panel .hint-tutor-input{font-size:max(16px,1rem)}}