/* Karaoke.chat — componentes. Los seis estados son obligatorios en todo
   elemento interactivo (skill karaoke-design-system §3). */

/* ================= FOCO ================= */
.k-focusable{
  position:relative; outline:none;
  transition:transform var(--k-dur) var(--k-ease),
             box-shadow var(--k-dur) var(--k-ease),
             background-color var(--k-dur) var(--k-ease);
}
.k-focusable.is-focused{
  outline:var(--k-focus-ring); outline-offset:2px;
  box-shadow:var(--k-focus-glow);
  transform:scale(var(--k-focus-scale));
  z-index:5;
}
.k-focusable:active{ transform:scale(.97); }
.k-focusable[aria-disabled="true"]{ opacity:.38; pointer-events:none; }
/* El hover solo existe donde hay puntero real: en TV ensucia el estado. */
@media (hover:hover) and (pointer:fine){
  .k-focusable:hover{ background-color:var(--k-surface-2); }
}

/* ================= NAV ================= */
.k-nav-brand{
  display:flex; align-items:center; gap:var(--k-s3);
  padding:var(--k-s2) var(--k-s2) var(--k-s5);
  font-weight:800; font-size:var(--k-fs-h2); white-space:nowrap;
}
.k-nav-brand .k-logo{
  width:40px; height:40px; flex:0 0 40px; border-radius:12px;
  background:var(--k-grad-hero); display:grid; place-items:center;
  font-size:20px;
}
.k-nav-item{
  display:flex; align-items:center; gap:var(--k-s4);
  min-height:var(--k-tap); padding:var(--k-s2) var(--k-s3);
  border-radius:var(--k-radius); color:var(--k-text-2); white-space:nowrap;
  border-left:4px solid transparent;
}
.k-nav-item .k-ico{ flex:0 0 24px; width:24px; height:24px; }
body.tv .k-nav-item .k-ico{ flex-basis:32px; width:32px; height:32px; }
.k-nav-item .k-label{ opacity:0; transition:opacity var(--k-dur) var(--k-ease); }
#nav.is-open .k-nav-item .k-label{ opacity:1; }
.k-nav-item.is-active{ color:var(--k-text); background:var(--k-surface);
  border-left-color:var(--k-accent); }
.k-nav-item.is-focused{ background:var(--k-surface-2); color:var(--k-text); }

@media (max-width:600px){
  .k-nav-brand{ display:none; }
  #nav{ justify-content:space-around; }
  .k-nav-item{ flex-direction:column; gap:2px; min-height:0; padding:6px 4px;
    border-left:0; border-radius:10px; font-size:11px; }
  .k-nav-item .k-label{ opacity:1; font-size:11px; }
  .k-nav-item.is-active{ background:none; color:var(--k-accent); }
}

/* ================= BOTONES ================= */
.k-btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:var(--k-s2); min-height:var(--k-tap); padding:0 var(--k-s5);
  border-radius:var(--k-radius-pill); font-weight:700;
  background:var(--k-surface-2); color:var(--k-text);
  border:1px solid var(--k-line);
}
.k-btn--primary{ background:var(--k-accent); border-color:transparent; color:#fff; }
.k-btn--ghost{ background:transparent; }
.k-btn--icon{ padding:0; width:var(--k-tap); }
.k-btn.is-focused{ background:var(--k-accent-2); color:#04120f; border-color:transparent; }
.k-btn--primary.is-focused{ background:#ff5a95; color:#fff; }

/* ================= HERO ================= */
.k-hero{
  position:relative; margin:0 calc(var(--k-safe) * -1) var(--k-s6);
  padding:var(--k-s8) var(--k-safe) var(--k-s6);
  min-height:44vh; display:flex; flex-direction:column; justify-content:flex-end;
  overflow:hidden;
}
body.tv .k-hero{ min-height:52vh; }
.k-hero__bg{ position:absolute; inset:0; z-index:0; }
.k-hero__bg img{ width:100%; height:100%; object-fit:cover; filter:saturate(1.1); }
.k-hero__bg::after{ content:""; position:absolute; inset:0; background:var(--k-grad-fade); }
.k-hero__bg::before{ content:""; position:absolute; inset:0; z-index:1;
  background:var(--k-grad-side); }
.k-hero__body{ position:relative; z-index:2; max-width:min(760px,72%); }
.k-hero__eyebrow{ font-size:var(--k-fs-meta); letter-spacing:.16em;
  text-transform:uppercase; color:var(--k-accent-2); font-weight:700;
  margin-bottom:var(--k-s2); }
.k-hero__title{ font-size:var(--k-fs-display); font-weight:900;
  letter-spacing:-.03em; line-height:1.02; margin:0 0 var(--k-s2); }
.k-hero__sub{ color:var(--k-text-2); margin:0 0 var(--k-s5);
  font-size:calc(var(--k-fs-body) * 1.05); }
.k-hero__actions{ display:flex; flex-wrap:wrap; gap:var(--k-s3); }
@media (max-width:600px){ .k-hero__body{ max-width:100%; } }

/* ================= CARRUSEL ================= */
.k-rail{ margin-bottom:var(--k-s6); }
.k-rail__head{ display:flex; align-items:baseline; justify-content:space-between;
  gap:var(--k-s4); margin-bottom:var(--k-s2); }
.k-rail__track{
  display:flex; gap:var(--k-card-gap);
  overflow-x:auto; overflow-y:visible;
  padding:var(--k-rail-pad) 4px;      /* aire para el glow del foco */
  scroll-behavior:smooth; scrollbar-width:none;
  -ms-overflow-style:none;
}
.k-rail__track::-webkit-scrollbar{ display:none; }

/* ================= TARJETA ================= */
.k-card{
  flex:0 0 var(--k-card-w); width:var(--k-card-w);
  border-radius:var(--k-radius); background:var(--k-surface);
  border:1px solid var(--k-line); overflow:hidden; text-align:left;
  display:flex; flex-direction:column;
}
.k-card__art{ position:relative; aspect-ratio:16/9; background:var(--k-surface-2);
  overflow:hidden; }
.k-card__art img{ width:100%; height:100%; object-fit:cover; }
.k-card__ph{                              /* placeholder, nunca un cuadro gris */
  position:absolute; inset:0; display:grid; place-items:center;
  font-size:calc(var(--k-card-w) / 4); font-weight:900; color:rgba(255,255,255,.85);
  background:var(--k-grad-hero); opacity:.22;
}
.k-card__dur{
  position:absolute; right:6px; bottom:6px; z-index:2;
  background:rgba(0,0,0,.72); color:#fff; font-size:var(--k-fs-meta);
  padding:2px 7px; border-radius:6px; font-variant-numeric:tabular-nums;
}
.k-card__fav{ position:absolute; left:6px; top:6px; z-index:2; font-size:18px;
  filter:drop-shadow(0 2px 6px rgba(0,0,0,.7)); }
.k-card__body{ padding:var(--k-s3); display:flex; flex-direction:column; gap:2px; }
.k-card__title{
  font-weight:700; font-size:var(--k-fs-body); line-height:1.25;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical;
  overflow:hidden;
}
.k-card__artist{ font-size:var(--k-fs-meta); color:var(--k-text-2);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.k-card.is-focused .k-card__art::after{
  content:""; position:absolute; inset:0;
  background:radial-gradient(120% 90% at 50% 100%,rgba(255,45,120,.35),transparent 65%);
}

/* Tarjeta redonda de artista/género */
.k-card--round{ background:transparent; border:0; text-align:center; }
.k-card--round .k-card__art{ aspect-ratio:1; border-radius:50%;
  border:1px solid var(--k-line); }
.k-card--round .k-card__ph{ border-radius:50%; }
.k-card--round .k-card__title{ -webkit-line-clamp:1; text-align:center; }

/* ================= LISTA ================= */
.k-list{ display:flex; flex-direction:column; gap:var(--k-s2); }
.k-row{
  display:flex; align-items:center; gap:var(--k-s4);
  padding:var(--k-s2) var(--k-s3); min-height:var(--k-tap);
  border-radius:var(--k-radius); background:var(--k-surface);
  border:1px solid var(--k-line); text-align:left; width:100%;
}
.k-row__art{ flex:0 0 96px; width:96px; aspect-ratio:16/9; border-radius:8px;
  overflow:hidden; background:var(--k-surface-2); position:relative; }
body.tv .k-row__art{ flex-basis:150px; width:150px; }
.k-row__art img{ width:100%; height:100%; object-fit:cover; }
.k-row__body{ flex:1 1 auto; min-width:0; }
.k-row__title{ font-weight:700; white-space:nowrap; overflow:hidden;
  text-overflow:ellipsis; }
.k-row__meta{ font-size:var(--k-fs-meta); color:var(--k-text-2);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.k-row__num{ flex:0 0 auto; color:var(--k-text-3); font-variant-numeric:tabular-nums;
  min-width:2.2em; text-align:right; }
.k-row__aside{ flex:0 0 auto; color:var(--k-text-2);
  font-variant-numeric:tabular-nums; }

/* ================= CHIPS ================= */
.k-chips{ display:flex; flex-wrap:wrap; gap:var(--k-s2); margin-bottom:var(--k-s4); }
.k-chip{ padding:0 var(--k-s4); min-height:calc(var(--k-tap) * .8);
  display:inline-flex; align-items:center; border-radius:var(--k-radius-pill);
  background:var(--k-surface); border:1px solid var(--k-line);
  font-size:var(--k-fs-meta); font-weight:600; }
.k-chip.is-selected{ background:var(--k-accent-3); border-color:transparent; }

/* ================= GRID ================= */
.k-grid{ display:grid; gap:var(--k-card-gap);
  grid-template-columns:repeat(auto-fill,minmax(var(--k-card-w),1fr));
  padding:var(--k-rail-pad) 0; }
.k-grid .k-card{ flex:initial; width:auto; }

/* ================= BUSCADOR ================= */
.k-searchbar{ display:flex; gap:var(--k-s3); align-items:stretch;
  margin:var(--k-s4) 0 var(--k-s5); flex-wrap:wrap; }
.k-searchbox{
  flex:1 1 320px; display:flex; align-items:center; gap:var(--k-s3);
  min-height:var(--k-tap); padding:0 var(--k-s4);
  background:var(--k-surface); border:1px solid var(--k-line);
  border-radius:var(--k-radius-pill); color:var(--k-text-2);
}
.k-searchbox input{
  flex:1 1 auto; min-width:0; background:none; border:0; outline:none;
  color:var(--k-text); font:inherit; font-size:var(--k-fs-body);
}
.k-searchbox.is-focused,.k-searchbox.is-typing{
  border-color:var(--k-accent-2); color:var(--k-text);
}

/* ================= TECLADO VIRTUAL ================= */
.k-osk{ display:grid; gap:var(--k-s2); margin:var(--k-s4) 0 var(--k-s6);
  grid-template-columns:repeat(10,minmax(0,1fr)); max-width:900px; }
body.tv .k-osk{ max-width:1200px; }
.k-key{
  display:grid; place-items:center; min-height:var(--k-tap);
  border-radius:10px; background:var(--k-surface); border:1px solid var(--k-line);
  font-weight:700; font-size:var(--k-fs-body); text-transform:uppercase;
}
.k-key--wide{ grid-column:span 2; }
.k-key--action{ background:var(--k-surface-2); color:var(--k-accent-2); }
.k-key--go{ background:var(--k-accent); color:#fff; grid-column:span 2; }

/* ================= DIÁLOGO ================= */
.k-overlay{
  position:fixed; inset:0; z-index:80; display:grid; place-items:center;
  background:rgba(7,7,11,.86); padding:var(--k-safe);
}
.k-dialog{
  width:min(560px,100%); background:var(--k-surface-2);
  border:1px solid var(--k-line); border-radius:var(--k-radius-lg);
  padding:var(--k-s6); box-shadow:0 30px 80px rgba(0,0,0,.7);
}
body.tv .k-dialog{ width:min(760px,100%); }
.k-dialog h2{ font-size:var(--k-fs-h1); margin:0 0 var(--k-s3); }
.k-dialog p{ color:var(--k-text-2); margin:0 0 var(--k-s5); }
.k-dialog__actions{ display:flex; gap:var(--k-s3); flex-wrap:wrap; }

/* ================= VOZ ================= */
.k-voice{ text-align:center; }
.k-voice__waves{ display:flex; justify-content:center; align-items:flex-end;
  gap:8px; height:80px; margin:var(--k-s5) 0; }
.k-voice__waves span{ width:10px; border-radius:99px; background:var(--k-accent-2);
  height:16px; transform-origin:bottom; animation:k-wave 900ms ease-in-out infinite; }
.k-voice__waves span:nth-child(2){ animation-delay:120ms; }
.k-voice__waves span:nth-child(3){ animation-delay:240ms; }
.k-voice__waves span:nth-child(4){ animation-delay:360ms; }
.k-voice__waves span:nth-child(5){ animation-delay:480ms; }
@keyframes k-wave{ 0%,100%{ transform:scaleY(.4); } 50%{ transform:scaleY(3); } }
.k-voice__heard{ font-size:var(--k-fs-h2); min-height:1.6em; color:var(--k-text); }

/* ================= TOAST ================= */
#toast{
  position:fixed; z-index:90; left:50%; bottom:calc(var(--k-safe) + 8px);
  transform:translateX(-50%);
  background:var(--k-surface-2); border:1px solid var(--k-accent-2);
  color:var(--k-text); padding:var(--k-s3) var(--k-s5);
  border-radius:var(--k-radius-pill); font-weight:600;
  box-shadow:0 12px 40px rgba(0,0,0,.6); max-width:min(90vw,640px);
  text-align:center;
}
@media (max-width:600px){ #toast{ bottom:80px; } }