:root {
  --fondo: #14202b;
  --panel: #1d2d3b;
  --marco: #0d151d;
  --tinta: #f1efe8;
  --suave: #9db0c0;
  --linea: #2f4457;
  --acento: #e8b14a;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; -webkit-tap-highlight-color: transparent;
  display: flex; flex-direction: column;
  background: var(--fondo); color: var(--tinta);
  font-family: "Rajdhani", "Segoe UI", system-ui, sans-serif;
  font-size: 18px; font-weight: 500;
  padding-top: env(safe-area-inset-top, 0px);
}

/* Título con la hora */
header { padding: 14px 16px 10px; }
h1 {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  margin: 0; font-family: "Rubik", "Segoe UI", sans-serif; font-weight: 700;
  font-size: clamp(1.25rem, 5vw, 1.9rem); letter-spacing: -0.01em;
}
time {
  font-family: "Rajdhani", "Segoe UI", sans-serif; font-weight: 700;
  font-size: clamp(1rem, 4.2vw, 1.4rem); color: var(--acento);
  font-variant-numeric: tabular-nums;
}
.practica { margin: 4px 0 0; color: var(--suave); font-size: .95rem; }

/* Imagen: ocupa todo el espacio disponible */
main { flex: 1; min-height: 0; padding: 0 12px; }
#marco {
  height: 100%; margin: 0; overflow: hidden; position: relative;
  background: var(--marco); border: 1px solid var(--linea); border-radius: 14px;
  cursor: zoom-in; touch-action: none;
}
#marco.zoom { cursor: grab; }
#marco.arrastrando { cursor: grabbing; }
#foto {
  display: block; width: 100%; height: 100%; object-fit: contain;
  transform-origin: 0 0; will-change: transform; pointer-events: none;
  user-select: none; -webkit-user-drag: none; -webkit-touch-callout: none;
}
#foto.suave { transition: transform .18s ease-out; }
#error { margin: 0; padding: 40px 20px; text-align: center; color: var(--suave); }

/* Barra de controles al alcance del pulgar */
.barra { padding: 10px 12px 6px; display: grid; gap: 8px; }
.fila { display: flex; align-items: center; justify-content: center; gap: 8px; }
.fila:last-child button { flex: 1; }
input[type=range] { flex: 1; min-width: 0; accent-color: var(--acento); height: 32px; }
button {
  font: inherit; min-height: 46px; min-width: 46px; padding: 0 14px;
  border: 1px solid var(--linea); border-radius: 12px;
  background: var(--panel); color: var(--tinta); cursor: pointer;
}
button:active { background: var(--linea); }
#mas, #menos { font-size: 1.4rem; line-height: 1; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--acento); outline-offset: 2px; }
#nivel { min-width: 52px; text-align: right; color: var(--suave); font-variant-numeric: tabular-nums; }

footer { padding: 6px 16px calc(10px + env(safe-area-inset-bottom, 0px)); text-align: center; color: var(--suave); font-size: .85rem; }
footer p { margin: 0; }

/* Pantallas grandes: contenido centrado */
@media (min-width: 900px) {
  header, main, .barra, footer { width: min(1000px, 100%); margin-inline: auto; }
  .barra { grid-template-columns: 1fr auto; align-items: center; }
}
@media (prefers-reduced-motion: reduce) { #foto { transition: none; } }

/* Flechas para mover la imagen (aparecen solo con zoom) */
.dpad {
  position: absolute; right: 10px; bottom: 10px; z-index: 2;
  display: grid; gap: 4px; grid-template-columns: repeat(3, 44px); grid-template-rows: repeat(3, 44px);
  grid-template-areas: ". arr ." "izq centro der" ". abj .";
}
.dpad.inactivo { opacity: .92; }
.dpad button {
  min-width: 0; min-height: 0; padding: 0; font-size: 1rem;
  background: var(--acento); color: #14202b; border: 2px solid #14202b; border-radius: 12px;
  font-size: 1.15rem; box-shadow: 0 2px 8px rgba(0, 0, 0, .5);
  touch-action: manipulation; -webkit-touch-callout: none; user-select: none;
}
.dpad [data-dir="arr"] { grid-area: arr; }
.dpad [data-dir="izq"] { grid-area: izq; }
.dpad [data-dir="centro"] { grid-area: centro; background: var(--tinta); }
.dpad [data-dir="der"] { grid-area: der; }
.dpad [data-dir="abj"] { grid-area: abj; }
.barra { touch-action: manipulation; }
#marco, #marco * { -webkit-touch-callout: none; -webkit-user-select: none; user-select: none; }