/* V138.5 — chapters remain inside the original player timeline; no buttons below. */
/* V148: los cortes de capitulo dibujados solo SOBRE la barra visible, nunca
   sobre los 12/9 px completos del area tactil (causa de las franjas negras). */
.tk-chapter-track{position:absolute;top:50%;left:0;right:0;height:7px;transform:translateY(-50%);z-index:2;pointer-events:none;overflow:hidden;border-radius:999px;transition:height .14s ease}
.tk-progress:hover .tk-chapter-track,.tk-progress.tk-dragging .tk-chapter-track,.tk-progress:focus-visible .tk-chapter-track{height:8px}
@media(max-width:767px),(hover:none) and (pointer:coarse){.tk-chapter-track{height:6px}.tk-progress:hover .tk-chapter-track,.tk-progress.tk-dragging .tk-chapter-track,.tk-progress:focus-visible .tk-chapter-track{height:7px}}
.tk-chapter-track-segment{position:absolute;top:0;height:100%;background:rgba(255,255,255,.09);pointer-events:none}
.tk-chapter-boundary{position:absolute;top:0;bottom:0;width:3px;transform:translateX(-50%);background:rgba(9,11,16,.9);box-shadow:0 0 0 1px rgba(255,255,255,.42);z-index:4;pointer-events:none;transition:width .18s ease}
.tk-progress:hover .tk-chapter-boundary{width:4px}
.tk-chapter-active-title{font-size:12px;font-weight:650;color:#e9eaf0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:min(24vw,235px)}
.tk-lecture-player-wrap .tk-has-timeline-preview .tk-progress-tooltip{opacity:0!important}
.tk-chapter-hover-card{position:absolute;z-index:9;bottom:22px;left:50%;display:flex;flex-direction:column;align-items:stretch;width:min(206px,70vw);padding:5px;background:rgba(19,22,29,.95);border:1px solid rgba(255,255,255,.18);border-radius:12px;box-shadow:0 12px 36px rgba(0,0,0,.35);color:#fff;pointer-events:none;opacity:0;visibility:hidden;transform:translate(-50%,7px) scale(.97);transition:opacity .2s ease,transform .25s cubic-bezier(.22,1,.36,1),visibility .2s ease;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.tk-chapter-hover-card.is-visible{opacity:1;visibility:visible;transform:translate(-50%,0) scale(1)}
.tk-chapter-preview-frame{display:grid;place-items:center;width:100%;aspect-ratio:16/9;overflow:hidden;border-radius:8px;background:linear-gradient(145deg,#242a36,#11141c);font-size:11px;color:#a4adbd}
.tk-chapter-preview-video{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .18s ease}
.tk-chapter-hover-card.has-frame .tk-chapter-preview-video{opacity:1}
.tk-chapter-hover-caption{display:block;padding:7px 6px 5px;text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:11px;line-height:1.4}
.tk-chapter-hover-name{font-weight:760}
.tk-chapter-hover-timestamp{color:#e7e9f2;font-weight:720}
@media(max-width:600px){.tk-chapter-active-title{font-size:10px;max-width:100px}.tk-chapter-hover-card{width:min(166px,57vw);bottom:17px}}
@media(prefers-reduced-motion:reduce){.tk-lecture-player-wrap .tk-player .tk-progress,.tk-chapter-hover-card,.tk-chapter-preview-video,.tk-chapter-boundary{transition:none!important}}

/* V142.3: legibilidad proporcional en reproductor y tráiler; se conserva 360px. */
.tk-lecture-player-wrap .tk-player .tk-time,.course-preview-frame .tk-player .tk-time{font-size:clamp(13px,1.05vw,19px)!important;gap:5px}
.tk-lecture-player-wrap .tk-player .tk-control,.course-preview-frame .tk-player .tk-control{min-width:clamp(32px,2.5vw,43px);min-height:clamp(32px,2.5vw,43px)}
.tk-lecture-player-wrap .tk-player .tk-speed-label,.course-preview-frame .tk-player .tk-speed-label{font-size:clamp(13px,.95vw,17px)!important}
.tk-lecture-player-wrap .tk-player .tk-chapter-active-title,.course-preview-frame .tk-player .tk-chapter-active-title{font-size:clamp(12px,1vw,17px)!important;max-width:min(28vw,330px)}
.tk-chapter-hover-card{width:clamp(190px,18vw,285px)!important}
.tk-chapter-hover-caption{font-size:clamp(12px,.95vw,16px)!important;padding:10px 8px 7px}
.tk-chapter-preview-frame{font-size:clamp(12px,.9vw,15px)}
@media(max-width:600px){.tk-chapter-hover-card{width:min(210px,62vw)!important}.tk-chapter-active-title{max-width:110px!important}}

@media (min-width:768px){
 .tk-lecture-player-wrap .tk-player .tk-controls-left,.tk-lecture-player-wrap .tk-player .tk-controls-right,
 .course-preview-frame .tk-player .tk-controls-left,.course-preview-frame .tk-player .tk-controls-right{min-height:clamp(46px,3.15vw,58px)!important}
 .tk-lecture-player-wrap .tk-player .tk-control svg,.course-preview-frame .tk-player .tk-control svg{width:clamp(23px,1.65vw,31px)!important;height:clamp(23px,1.65vw,31px)!important}
 .tk-lecture-player-wrap .tk-player .tk-controls-left,.course-preview-frame .tk-player .tk-controls-left{padding:0 clamp(18px,1.35vw,27px)!important}
}