/* ============================================================
   TuLab — Landing minimalista, sin scroll
   Paleta: arena dorada sobre fondo profundo (ref. CodePen "Sand")
   ============================================================ */

:root {
  --bg-0: #0f1115;
  --bg-1: #20242b;
  --sand: #eccc74;
  --ink:  #f3ead2;
  --muted: rgba(243, 234, 210, 0.42);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-0);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* --- Lienzo de arena: ocupa toda la pantalla, de fondo --- */
#sandCanvas {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top, var(--bg-1), var(--bg-0) 72%);
  z-index: 0;
}

/* --- Capa de interfaz --- */
.ui {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none; /* el canvas respira; cada control reactiva */
}
.ui > * { pointer-events: auto; }

/* Entrada suave */
.top, .sidenav, .stage {
  opacity: 0;
  animation: fade 1s var(--ease) forwards;
}
.top    { animation-delay: 0.15s; }
.sidenav{ animation-delay: 0.4s; }
.stage  { animation-delay: 0.6s; }
@keyframes fade { to { opacity: 1; } }

/* --- Barra superior --- */
.top {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(20px, 4vw, 40px);
}

.brandmark {
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 19px);
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brandmark .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sand);
  box-shadow: 0 0 0 4px rgba(236, 204, 116, 0.16);
  transition: box-shadow 0.4s var(--ease);
}
.brandmark:hover .dot { box-shadow: 0 0 0 7px rgba(236, 204, 116, 0.12); }

.contact {
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.35s var(--ease);
}
.contact:hover { color: var(--ink); }

/* --- Nav lateral de marcas: solo nombres, sin bordes --- */
.sidenav {
  position: absolute;
  left: clamp(20px, 4vw, 44px);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 1.8vh, 18px);
}

.brand {
  background: none;
  border: 0;
  padding: 2px 0;
  cursor: pointer;
  text-align: left;
  font: inherit;
  font-weight: 600;
  font-size: clamp(15px, 1.9vw, 18px);
  letter-spacing: -0.01em;
  color: var(--muted);
  position: relative;
  transition: color 0.4s var(--ease), transform 0.4s var(--ease);
}
.brand::before {
  /* pequeño marcador de acento, aparece al activar */
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c);
  transform: translateY(-50%) scale(0);
  transition: transform 0.4s var(--ease);
}
.brand:hover { color: var(--ink); }
.brand.is-active {
  color: var(--c);
  transform: translateX(8px);
}
.brand.is-active::before { transform: translateY(-50%) scale(1); }

/* --- Escenario: explicación bajo el nombre de arena --- */
.stage {
  position: absolute;
  left: 50%;
  top: 60%;
  transform: translateX(-50%);
  width: min(560px, 78vw);
  text-align: center;
  pointer-events: none;
}
.stage-text {
  margin: 0;
  font-size: clamp(14px, 1.9vw, 18px);
  line-height: 1.55;
  color: var(--ink);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.stage-text.show { opacity: 0.92; transform: none; }

.stage-media {
  display: inline-flex;
  margin-top: clamp(18px, 3vh, 28px);
  opacity: 0;
  transform: translateY(8px) scale(0.98);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  pointer-events: auto;
}
.stage-media.show {
  opacity: 1;
  transform: none;
}
.stage-media img {
  display: block;
  width: clamp(118px, 18vw, 164px);
  height: clamp(118px, 18vw, 164px);
  padding: 10px;
  background: rgba(243, 234, 210, 0.92);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.22);
}

.tuqr-landing .stage {
  top: auto;
  bottom: max(24px, env(safe-area-inset-bottom));
}
.tuqr-landing {
  --bg-0: #fff;
  --bg-1: #fff;
  --sand: #000;
  --ink: #000;
  --muted: rgba(0, 0, 0, 0.56);
  background: #fff;
  color: #000;
}
.tuqr-landing #sandCanvas { background: #fff; }
.tuqr-hero-eyes {
  position: fixed;
  left: 50%;
  top: 12vh;
  z-index: 2;
  width: min(24vw, 220px);
  transform: translateX(-50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--ease);
  fill: #000;
}
.tuqr-hero-eyes .tuqr-eye-mask {
  fill: #fff;
}
.tuqr-hero-eyes.is-visible { opacity: 1; }
.tuqr-hero-eyes {
  display: block;
  height: auto;
}
/* El parpadeo (scaleY) colapsa cada pupila a su CENTRO. Se usa transform-box:
   view-box con un transform-origin explicito en coordenadas del viewBox (centro
   exacto de cada rect), porque transform-box: fill-box se renderiza mal en WebKit
   (iOS Safari): colapsaba la linea descentrada, dejando una raya sobre la pupila. */
.tuqr-hero-eyes .tuqr-eye-left,
.tuqr-hero-eyes .tuqr-eye-right {
  transform-box: view-box;
}
.tuqr-hero-eyes .tuqr-eye-left { transform-origin: 96.585px 200.075px; }
.tuqr-hero-eyes .tuqr-eye-right { transform-origin: 427.745px 200.075px; }
.tuqr-hero-eyes.is-awake .tuqr-eye-left,
.tuqr-hero-eyes.is-awake .tuqr-eye-right {
  animation: tuqr-eye-sequence 2.35s ease-in-out 0.15s both;
}
@keyframes tuqr-eye-sequence {
  0%, 12% { transform: translateX(0) scaleY(1); }
  24%, 34% { transform: translateX(6px) scaleY(1); }
  46%, 56% { transform: translateX(-6px) scaleY(1); }
  68% { transform: translateX(0) scaleY(1); }
  73% { transform: translateX(0) scaleY(0.08); }
  79% { transform: translateX(0) scaleY(1); }
  86% { transform: translateX(0) scaleY(0.08); }
  94%, 100% { transform: translateX(0) scaleY(1); }
}
.tuqr-landing .top {
  justify-content: space-between;
  gap: 20px;
}
.tuqr-landing .contact { color: rgba(0, 0, 0, 0.58); }
.tuqr-landing .contact:hover { color: #000; }
.tuqr-landing .stage-text { color: #000; }
.top-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(72px, 9vw, 104px);
  color: #000;
  text-decoration: none;
}
.top-logo img {
  display: block;
  width: 100%;
  height: auto;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Móvil: marcas abajo en fila --- */
@media (max-width: 640px) {
  .sidenav {
    left: 50%;
    top: auto;
    bottom: clamp(20px, 5vh, 36px);
    transform: translateX(-50%);
    flex-direction: row;
    gap: 18px;
  }
  .brand.is-active { transform: translateY(-4px); }
  .brand::before { left: 50%; top: -12px; transform: translateX(-50%) scale(0); }
  .brand.is-active::before { transform: translateX(-50%) scale(1); }
  .stage { top: 54%; }
  .tuqr-landing .top {
    padding: 18px 20px;
  }
  .tuqr-landing .stage {
    top: auto;
    bottom: max(18px, env(safe-area-inset-bottom));
    width: min(360px, 86vw);
  }
  .tuqr-landing .stage-text {
    font-size: 13px;
    line-height: 1.35;
  }
  .top-logo {
    width: 72px;
  }
  .tuqr-hero-eyes {
    top: 13vh;
    width: min(34vw, 170px);
  }
  .stage-media img {
    width: 118px;
    height: 118px;
    padding: 8px;
  }
}

@media (max-height: 620px) {
  .tuqr-landing .stage {
    bottom: 14px;
  }
  .tuqr-landing .stage-text {
    font-size: 12px;
    line-height: 1.3;
  }
  .top-logo {
    width: 70px;
  }
  .tuqr-hero-eyes {
    top: 13vh;
    width: min(34vw, 160px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .top, .sidenav, .stage { animation: none; opacity: 1; }
}