/* ==========================================================================
   tutorial.css — tutoriales del portal              prefijos: .tuts- / .tut-
   .tuts-  portada de tutoriales (/tutoriales/): encabezado + tarjetas.
           Sale de tokens, así que pasa a claro en modo día.
   .tut-   reproductor de un tutorial: texto a la izquierda, clip a la
           derecha, barra de pasos abajo. Es una "banda oscura" (se queda de
           noche siempre, ver theme-light.css): es un video, se mira oscuro.
   ========================================================================== */

/* ---------- espacio bajo el header fijo, en las dos páginas ---------- */
.tut-main {
  padding-top: calc(var(--hdr-h) + var(--hdr-top) + 1rem);
  padding-bottom: 1.25rem;
}

/* =====================================================================
   PORTADA  /tutoriales/
   ===================================================================== */
.tuts-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(2.5rem, 1rem + 5vw, 5.5rem) clamp(1.25rem, .5rem + 3vw, 4rem);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(50% 60% at 92% 0%, rgba(193, 44, 229, .16), transparent 70%),
    radial-gradient(40% 50% at 0% 100%, rgba(79, 124, 255, .10), transparent 70%),
    var(--surface);
}

.tuts-head { max-width: 46rem; }
.tuts-head .eyebrow { margin-bottom: 1.25rem; }
.tuts-head h1 {
  font-size: var(--fs-h2);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-wrap: balance;
}
.tuts-head p {
  margin-top: 1.25rem;
  max-width: 38rem;
  color: var(--text-2);
  font-size: var(--fs-md);
  line-height: 1.65;
}

.tuts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
  gap: clamp(1rem, .5rem + 1.5vw, 1.75rem);
  margin-top: clamp(2rem, 1rem + 3vw, 3.5rem);
}

.tuts-card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  background: var(--surface-2);
  color: var(--text);
  transition: transform var(--t-med) var(--ease-out), box-shadow var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
.tuts-card:hover { transform: translateY(-4px); border-color: rgba(193, 44, 229, .45); box-shadow: var(--glow-brand); }
.tuts-card:focus-visible { outline: 2px solid var(--brand-hi); outline-offset: 3px; }

.tuts-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0B0912;
}
.tuts-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease-out);
}
.tuts-card:hover .tuts-card__media img { transform: scale(1.04); }
/* botón de play sobre la miniatura */
.tuts-card__media::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 3.5rem; height: 3.5rem;
  translate: -50% -50%;
  border-radius: 50%;
  background: var(--grad-btn) padding-box;
  box-shadow: 0 16px 40px -10px rgba(193, 44, 229, .9);
}
.tuts-card__play {
  position: absolute;
  left: 50%; top: 50%;
  z-index: 1;
  width: 1.1rem; height: 1.1rem;
  translate: -38% -50%;
  fill: #fff;
}

.tuts-card__body { display: grid; gap: .6rem; padding: 1.35rem 1.4rem 1.5rem; }
.tuts-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.tuts-chip {
  padding: .3rem .7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  color: var(--text-2);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}
.tuts-card h2 {
  margin-top: .3rem;
  font-size: var(--fs-h3);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
  text-wrap: balance;
}
.tuts-card p { color: var(--text-2); line-height: 1.6; }
.tuts-card__cta {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: .4rem;
  color: var(--brand-ink);
  font-weight: 700;
  font-size: var(--fs-sm);
}
.tuts-card__cta svg { width: 1rem; height: 1rem; transition: translate var(--t-fast) var(--ease); }
.tuts-card:hover .tuts-card__cta svg { translate: 4px 0; }

/* =====================================================================
   REPRODUCTOR  /tutoriales/<tutorial>/
   ===================================================================== */
.tut-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.5rem, .75rem + 2.5vw, 3rem) clamp(1.25rem, .5rem + 3vw, 3.5rem) clamp(1.25rem, .5rem + 2vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(55% 50% at 4% 6%, rgba(193, 44, 229, .20), transparent 68%),
    radial-gradient(45% 45% at 98% 96%, rgba(79, 124, 255, .15), transparent 70%),
    var(--surface);
  color: var(--text);
}
/* grilla tenue detrás, más visible arriba a la izquierda */
.tut-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(72% 70% at 30% 30%, #000 18%, transparent 76%);
  mask-image: radial-gradient(72% 70% at 30% 30%, #000 18%, transparent 76%);
}

/* ---------- barra superior: volver + nombre del tutorial ---------- */
.tut-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.25rem;
  padding-bottom: clamp(1.25rem, .75rem + 1.5vw, 2rem);
  margin-bottom: clamp(1.25rem, .75rem + 1.5vw, 2.25rem);
  border-bottom: 1px solid var(--line);
}
.tut-back {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--text-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  transition: color var(--t-fast) var(--ease);
}
.tut-back:hover { color: var(--text); }
.tut-back svg { width: 1rem; height: 1rem; rotate: 180deg; }
.tut-name {
  color: var(--text-3);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

/* ---------- escenario: texto + clip ---------- */
.tut-grid {
  display: grid;
  grid-template-columns: minmax(0, clamp(20rem, 32vw, 36rem)) minmax(0, 1fr);
  gap: clamp(1.5rem, 1rem + 2.5vw, 3.75rem);
  align-items: center;
}
.tut-copy { min-width: 0; }

.tut-pill {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  padding: .4rem 1rem .4rem .4rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .03);
  color: var(--text-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.tut-pill b {
  display: grid;
  place-items: center;
  width: 1.65rem; height: 1.65rem;
  border-radius: 50%;
  background: var(--grad-btn);
  color: #fff;
  font-size: .8rem;
}

.tut-title {
  margin-top: 1.25rem;
  font-size: clamp(2rem, 1.2rem + 2.6vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  font-weight: 800;
  text-wrap: balance;
}
/* OJO: background-image, no el atajo background (reinicia background-clip) */
.tut-title em {
  font-style: normal;
  background-image: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  /* letras que bajan de la línea (g, p, y) dentro del degradé */
  padding-bottom: .12em;
  margin-bottom: -.12em;
}
.tut-lead {
  margin-top: 1rem;
  max-width: 34rem;
  color: var(--text-2);
  font-size: clamp(1rem, .95rem + .25vw, 1.125rem);
  line-height: 1.65;
}

.tut-points { display: grid; gap: .8rem; margin-top: 1.5rem; padding: 0; list-style: none; }
.tut-points li {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  font-size: clamp(.9375rem, .9rem + .15vw, 1.03rem);
  line-height: 1.55;
  min-width: 0;
}
.tut-points i {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.5rem; height: 1.5rem;
  margin-top: .1rem;
  border-radius: 50%;
  border: 1px solid rgba(193, 44, 229, .45);
  background: rgba(193, 44, 229, .14);
  color: var(--brand-hi);
  font-size: .72rem;
  font-style: normal;
  font-weight: 700;
}
.tut-points kbd,
.tut-tip kbd {
  padding: .05rem .4rem;
  border: 1px solid var(--line-strong);
  border-radius: .4rem;
  background: rgba(255, 255, 255, .08);
  font: inherit;
  font-weight: 700;
  font-size: .92em;
  white-space: nowrap;
}

.tut-tip {
  margin-top: 1.5rem;
  max-width: 36rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--brand);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(193, 44, 229, .10);
  color: #DAD5E6;
  font-size: var(--fs-sm);
  line-height: 1.6;
}
.tut-tip b { color: #fff; }

/* ---------- pantalla con el clip ---------- */
.tut-screen { min-width: 0; }
.tut-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  container-type: inline-size;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  background: #0B0912;
  box-shadow: 0 50px 100px -48px rgba(0, 0, 0, .95), 0 0 0 1px rgba(193, 44, 229, .14);
}
.tut-zoom {
  position: absolute;
  inset: 0;
  transform-origin: 50% 50%;
  transition: transform .85s cubic-bezier(.4, .05, .2, 1);
  will-change: transform;
}
.tut-zoom video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
}

/* globos: un aro que ilumina una zona (oscurece el resto) y una etiqueta */
.tut-cue {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .35s ease;
}
.tut-cue[data-on="1"] { opacity: 1; }
.tut-cue__ring {
  position: absolute;
  border: 2px solid var(--brand-hi);
  border-radius: 10px;
  box-shadow: 0 0 0 9999px rgba(6, 5, 12, .42), 0 0 24px rgba(227, 106, 240, .65);
}
.tut-cue__tag {
  position: absolute;
  transform-origin: 0 0;
  white-space: nowrap;
  padding: .62em 1.1em;
  border-radius: var(--r-pill);
  background: var(--grad-btn);
  color: #fff;
  /* crece con el ancho del video, no con la pantalla: siempre entra en el cuadro */
  font-size: clamp(9px, 1.6cqw, 15px);
  font-weight: 700;
  box-shadow: 0 16px 34px -14px rgba(193, 44, 229, .9);
}

/* controles del clip */
.tut-player {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-top: .8rem;
}
.tut-pbtn {
  flex: none;
  display: grid;
  place-items: center;
  width: 2.25rem; height: 2.25rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(255, 255, 255, .04);
  color: var(--text);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.tut-pbtn:hover { background: rgba(255, 255, 255, .09); border-color: rgba(255, 255, 255, .28); }
.tut-pbtn svg { width: .9rem; height: .9rem; fill: currentColor; }
.tut-seek {
  flex: 1;
  min-width: 0;
  height: 4px;
  appearance: none;
  -webkit-appearance: none;
  border-radius: var(--r-pill);
  cursor: pointer;
  background:
    linear-gradient(90deg, var(--blue), var(--brand)) 0 / var(--p, 0%) 100% no-repeat,
    rgba(255, 255, 255, .12);
}
.tut-seek::-webkit-slider-thumb { -webkit-appearance: none; width: 13px; height: 13px; border-radius: 50%; background: #fff; border: 0; }
.tut-seek::-moz-range-thumb { width: 13px; height: 13px; border-radius: 50%; background: #fff; border: 0; }
.tut-time {
  flex: none;
  color: var(--text-3);
  font-size: var(--fs-xs);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ---------- barra de pasos ---------- */
.tut-rail {
  display: flex;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: clamp(1.75rem, 1rem + 2vw, 2.75rem);
  padding-top: clamp(1.25rem, .75rem + 1vw, 1.75rem);
  border-top: 1px solid var(--line);
}

/* círculos numerados unidos por una línea que se llena con el avance */
.tut-steps {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: space-between;
  max-width: 34rem;
}
.tut-steps::before,
.tut-steps::after {
  content: "";
  position: absolute;
  left: 1rem; right: 1rem;
  top: 50%;
  height: 2px;
  translate: 0 -50%;
  border-radius: 2px;
  background: var(--line-strong);
}
.tut-steps::after {
  right: auto;
  width: calc((100% - 2rem) * var(--tut-step-fill, 0));
  background: linear-gradient(90deg, var(--blue), var(--brand));
  transition: width var(--t-med) var(--ease);
}
.tut-steps button {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2rem; height: 2rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--text-3);
  font-size: .78rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.tut-steps button:hover { color: var(--text); border-color: rgba(255, 255, 255, .3); }
.tut-steps button[aria-current="step"] {
  border-color: transparent;
  background: var(--grad-btn);
  color: #fff;
  box-shadow: 0 8px 22px -8px rgba(193, 44, 229, .9);
}

.tut-nav { display: flex; gap: .5rem; margin-left: auto; }
.tut-nav .btn[disabled] { opacity: .35; pointer-events: none; }
.tut-count {
  flex: none;
  color: var(--text-3);
  font-size: var(--fs-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .tut-grid { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .tut-copy { order: 2; }
  .tut-screen { order: 1; }
}
@media (max-width: 760px) {
  .tut-rail { flex-wrap: wrap; }
  .tut-steps { flex-basis: 100%; max-width: none; }
  .tut-count { display: none; }
  .tut-nav { flex: 1; margin-left: 0; }
  .tut-nav .btn { flex: 1; justify-content: center; }
}
@media (max-width: 420px) {
  .tut-steps button { width: 1.75rem; height: 1.75rem; font-size: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  .tut-zoom, .tut-cue, .tuts-card, .tuts-card__media img { transition: none; }
}