:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1d2433;
  --muted: #5e6a80;
  --line: #e2e7f0;
  --accent: #2f6fed;
  --accent-soft: #e6eefe;
  --ok: #1f9d55;
  --ok-soft: #e3f6ea;
  --rest: #f1f3f7;
  --fuerza: #7a4cf0;
  --cardio: #e8590c;
  --movilidad: #0c8599;
  --core: #c2255c;
  --serie: #2a78d6;
  --pista: #dce8f8;
  --error: #c92a2a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --card: #1a202b;
    --text: #e8ecf3;
    --muted: #9aa6ba;
    --line: #2b3342;
    --accent: #5b8cff;
    --accent-soft: #22304d;
    --ok: #3ccf7a;
    --ok-soft: #1c3527;
    --rest: #161b24;
    --error: #ff6b6b;
    --serie: #3987e5;
    --pista: #22304d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.top { text-align: center; padding: 32px 16px 8px; }
.top h1 { margin: 0; font-size: 1.9rem; }
.sub { color: var(--muted); margin: 4px 0 0; }

main { max-width: 1100px; margin: 0 auto; padding: 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 12px; font-size: 1.25rem; }

#vista-form { max-width: 640px; margin: 0 auto 16px; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid .full { grid-column: 1 / -1; }
@media (max-width: 520px) { .grid { grid-template-columns: 1fr; } }

label { display: flex; flex-direction: column; font-weight: 600; font-size: .9rem; gap: 4px; }
input[type=text], input[type=number], select {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
}

fieldset { border: none; padding: 0; margin: 18px 0 0; }
legend { font-weight: 700; margin-bottom: 8px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { flex-direction: row; cursor: pointer; font-weight: 500; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  user-select: none;
}
.chip input:checked + span { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.hint { color: var(--muted); font-size: .85rem; margin: 6px 0 0; }
.error { color: var(--error); min-height: 1.2em; font-weight: 600; }

.btn {
  font: inherit;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  padding: 12px 18px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn.sec { background: var(--accent-soft); color: var(--accent); }
form .btn { width: 100%; margin-top: 4px; }

.hidden { display: none !important; }

.resumen { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.progreso { min-width: 200px; flex: 1; max-width: 320px; }
.barra { height: 12px; background: var(--line); border-radius: 999px; overflow: hidden; }
#barra-relleno { height: 100%; width: 0; background: var(--ok); transition: width .3s; }
#progreso-texto { margin: 6px 0 0; font-size: .9rem; color: var(--muted); }
.acciones { display: flex; gap: 8px; flex-wrap: wrap; }

.consejos ul { margin: 0; padding-left: 20px; }
.consejos li { margin: 4px 0; }
.consejos h3 { margin: 0 0 8px; font-size: 1rem; }

.semana-hint { margin: 0 0 10px; }
.semana { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }

.dia {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dia.descanso { background: var(--rest); color: var(--muted); }
.dia.hecho { border-color: var(--ok); background: var(--ok-soft); }
.dia.hoy { box-shadow: 0 0 0 2px var(--accent); }

.dia-top { display: flex; justify-content: space-between; align-items: center; }
.dia-nombre { font-weight: 800; font-size: 1.05rem; }
.tag { font-size: .75rem; font-weight: 700; padding: 3px 8px; border-radius: 999px; color: #fff; }
.tag.fuerza { background: var(--fuerza); }
.tag.cardio { background: var(--cardio); }
.tag.movilidad { background: var(--movilidad); }
.tag.core { background: var(--core); }
.tag.hoy-tag { background: var(--accent); }

.dia h3 { margin: 0; font-size: 1rem; }
.dia .meta { font-size: .85rem; color: var(--muted); margin: 0; }
.dia ul { margin: 0; padding: 0; list-style: none; font-size: .9rem; }
.dia li { margin: 2px 0; }
.dia li.paso { padding-left: 14px; position: relative; color: var(--muted); }
.dia li.paso::before { content: "•"; position: absolute; left: 2px; }

/* Ejercicio: se abre al tocarlo para ver la explicación */
.dia li.ej { border-top: 1px solid var(--line); }
.dia li.ej:first-child { border-top: none; }
.ej summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  cursor: pointer;
  list-style: none;
}
.ej summary::-webkit-details-marker { display: none; }
.ej-nombre::before { content: "▸ "; color: var(--muted); }
.ej details[open] .ej-nombre::before { content: "▾ "; }
.dosis { color: var(--muted); font-size: .8rem; white-space: nowrap; }
.como { margin: 0 0 8px; padding: 8px 10px; background: var(--bg); border-radius: 8px; font-size: .85rem; }
.dia.hecho .como { background: var(--card); }
.dosis.marcado { color: var(--ok); font-weight: 700; }
.dosis.marcado::before { content: "✓ "; }

/* Apuntar marcas */
.registro { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 8px; margin: 0 0 6px; }
.campo { font-size: .75rem; font-weight: 600; color: var(--muted); gap: 2px; }
.registro input, .peso-semana input {
  font: inherit;
  font-size: 1rem;
  width: 84px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
.registro input[aria-invalid=true], .peso-semana input[aria-invalid=true] { border-color: var(--error); }
.ritmo { font-size: .85rem; font-weight: 700; color: var(--ok); padding-bottom: 8px; }
.ultima { margin: 0 0 8px; font-size: .8rem; color: var(--muted); }
.apunta { margin: 4px 0 0; font-size: .85rem; font-weight: 700; }
.peso-semana { min-width: 180px; }
.peso-semana .hint { margin: 2px 0 0; }
.campo-fila { display: flex; align-items: center; gap: 6px; color: var(--text); }

.ej summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.hecho-check { flex-direction: row; align-items: center; gap: 8px; margin-top: auto; padding-top: 8px; cursor: pointer; }
.hecho-check input { width: 18px; height: 18px; accent-color: var(--ok); }

/* ---------- Mi progreso ---------- */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; }
.tile p { margin: 0; }
.tile-et { font-size: .85rem; color: var(--muted); font-weight: 600; }
.tile-val { font-size: 2rem; font-weight: 700; line-height: 1.2; margin: 4px 0 !important; }
.tile-extra { font-size: .8rem; color: var(--muted); }
@media (max-width: 520px) {
  .tiles { gap: 8px; }
  .tile { padding: 12px; }
  .tile-et { font-size: .72rem; }
  .tile-val { font-size: 1.35rem; }
  .tile-extra { font-size: .7rem; }
}

.card h3 { margin: 0 0 4px; font-size: 1.05rem; }
.grafico { position: relative; margin-top: 10px; min-height: 60px; }
.grafico svg { display: block; max-width: 100%; overflow: visible; }
.grafico svg:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 6px; }
.rejilla { stroke: var(--line); stroke-width: 1; }
.eje { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.etq { fill: var(--text); font-size: 12px; font-weight: 700; }
.linea { fill: none; stroke: var(--serie); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.area { fill: var(--serie); opacity: .1; }
.punto { fill: var(--serie); stroke: var(--card); stroke-width: 2; }
.punto.activo { r: 6; }
.guia { stroke: var(--muted); stroke-width: 1; }
.pista { fill: var(--pista); }
.col { fill: var(--serie); }
.zona { fill: transparent; cursor: crosshair; }
.zona:focus { outline: none; }
.zona:focus-visible { fill: var(--accent-soft); opacity: .5; }
.tip {
  position: absolute;
  transform: translate(-50%, -100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .12);
  pointer-events: none;
  white-space: nowrap;
  font-size: .8rem;
  z-index: 2;
}
.tip strong { display: block; font-size: .95rem; }
.tip span { color: var(--muted); }
.vacio { color: var(--muted); font-size: .9rem; margin: 8px 0; padding: 16px; background: var(--bg); border-radius: 10px; text-align: center; }
.sel-marca { max-width: 360px; margin-top: 8px; }
.ver-tabla { margin-top: 10px; font-size: .9rem; }
.ver-tabla summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.ver-tabla table { width: 100%; border-collapse: collapse; margin-top: 8px; font-variant-numeric: tabular-nums; }
.ver-tabla th, .ver-tabla td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.ver-tabla th { color: var(--muted); font-weight: 600; }

/* ---------- Copia de seguridad ---------- */
.copia-botones { margin-top: 10px; }
.aviso { margin: 10px 0 0; font-size: .9rem; color: var(--muted); min-height: 1.2em; }
.aviso.ok { color: var(--ok); font-weight: 600; }
.aviso.error { color: var(--error); font-weight: 600; }
.inicio-copia { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 14px; text-align: center; }
.inicio-copia .hint { margin: 0 0 8px; }

.pie { text-align: center; color: var(--muted); font-size: .8rem; padding: 16px 16px 32px; }