/* Osakapp · estilos. Tokens aprobados en el diseño: fondo claro, verde menta, sin bordes ni sombras salvo la barra flotante. */
:root {
  --bg: #FDFBF6;
  --card: #FFFFFF;
  --soft: #F1F0F2;
  --ink: #2B2A33;
  --ink2: #5E5B66;
  --mint: #8FDCC6;
  --mint-d: #5CC2A5;
  --mint-l: #E9F7F2;
  --mint-m: #CDEFE3;
  --mint-ink: #1B6355;
  --link: #2A7A6D;
  --icon: #25997A;
  --r: 20px;
  --pad: 20px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Nunito', 'Zen Maru Gothic', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.5;
}
.jp, .kana, [lang="ja"] { font-family: 'Zen Maru Gothic', 'Nunito', 'Hiragino Maru Gothic ProN', 'Yu Gothic', sans-serif; }
h1, h2, h3, p, ul { margin: 0; }
ul { padding-left: 20px; }
a { color: var(--link); text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--mint-d); outline-offset: 2px; }
.app { max-width: 520px; margin: 0 auto; padding: 0 max(var(--pad), env(safe-area-inset-right)) 0 max(var(--pad), env(safe-area-inset-left)); }

/* Cabecera */
.top { display: flex; align-items: center; padding: 16px 0 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: 20px; letter-spacing: .2px; }
.logo { width: 36px; height: 36px; border-radius: 12px; background: var(--mint); color: var(--mint-ink); display: grid; place-items: center; font-family: 'Zen Maru Gothic', sans-serif; font-weight: 700; font-size: 20px; }
.top-r { display: flex; align-items: center; gap: 8px; }
.chip { border: 0; background: var(--soft); border-radius: 999px; padding: 8px 14px; font-weight: 700; font-size: 14px; color: var(--ink2); }
.chip[aria-pressed="true"] { background: var(--mint-m); color: var(--mint-ink); }
.icon-btn { width: 40px; height: 40px; border-radius: 999px; background: var(--soft); display: grid; place-items: center; color: var(--icon); border: 0; }
.icon-btn svg { width: 22px; height: 22px; }

main { padding-bottom: 130px; outline: none; }
.view > * + * { margin-top: 16px; }

/* Texto */
.h1 { font-size: 28px; font-weight: 800; line-height: 1.2; }
.h2 { font-size: 20px; font-weight: 800; margin-top: 28px; }
.sub { color: var(--ink2); }
.small { font-size: 14px; }
.rj { color: var(--ink2); font-size: .85em; font-weight: 600; }
body.no-romaji .rj { display: none; }
.pre { white-space: pre-line; }

/* Tarjetas */
.card { background: var(--card); border-radius: var(--r); padding: 18px; }
.card.mint { background: var(--mint-l); }
.card.soft { background: var(--soft); }
.stack > * + * { margin-top: 12px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.row { display: flex; align-items: center; gap: 12px; }
.row > .grow { flex: 1; min-width: 0; }
.between { justify-content: space-between; }

/* Botones */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 999px; padding: 14px 24px; font-weight: 800; background: var(--soft); color: var(--ink); text-align: center; }
.btn.primary { background: var(--mint); color: var(--mint-ink); }
.btn.block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: default; }
.spk { flex: none; width: 40px; height: 40px; border-radius: 999px; border: 0; background: var(--soft); color: var(--icon); display: grid; place-items: center; }
.spk svg { width: 20px; height: 20px; }
.back { display: inline-flex; align-items: center; gap: 4px; color: var(--link); font-weight: 700; }
.back svg { width: 18px; height: 18px; }

/* Barras */
.bar { height: 10px; border-radius: 999px; background: var(--soft); overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--mint-d); border-radius: 999px; }
.card.mint .bar { background: #FFFFFF; }

/* Ruta y números */
.num { flex: none; width: 44px; height: 44px; border-radius: 999px; background: var(--soft); color: var(--ink2); display: grid; place-items: center; font-weight: 800; }
.num.seen { background: var(--mint); color: var(--mint-ink); }
.num.next { background: var(--mint-l); color: var(--mint-ink); }
.dots { display: flex; flex-wrap: wrap; gap: 8px; }
.lrow { display: flex; align-items: center; gap: 14px; padding: 14px 16px; background: var(--card); border-radius: var(--r); color: var(--ink); }
.lrow + .lrow { margin-top: 10px; }
.lrow .t { font-weight: 800; }
.tag { font-size: 13px; font-weight: 700; background: var(--mint-m); color: var(--mint-ink); border-radius: 999px; padding: 3px 10px; }
.tag.soon { background: var(--soft); color: var(--ink2); }
a.card, a.lrow { display: block; }
a.lrow { display: flex; }

/* Kana */
.kgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(76px, 1fr)); gap: 10px; }
.kcell { border: 0; background: var(--card); border-radius: 18px; padding: 12px 4px; display: flex; flex-direction: column; align-items: center; gap: 2px; }
.kcell b { font-size: 34px; font-weight: 700; line-height: 1.2; font-family: 'Zen Maru Gothic', sans-serif; }
.kcell:active { background: var(--mint-l); }
.wrow { display: flex; align-items: center; gap: 14px; background: var(--card); border-radius: var(--r); padding: 12px 14px; }
.wrow + .wrow { margin-top: 10px; }
.thumb { flex: none; width: 64px; height: 64px; border-radius: 16px; background: var(--soft); display: grid; place-items: center; overflow: hidden; font-size: 28px; font-family: 'Zen Maru Gothic', sans-serif; }
.thumb svg { width: 56px; height: 56px; }
.w-jp { font-size: 24px; font-weight: 700; font-family: 'Zen Maru Gothic', sans-serif; line-height: 1.2; }
.w-k { font-size: 16px; font-weight: 500; margin-left: 6px; color: var(--ink); }

/* Vocabulario */
.vcard { background: var(--card); border-radius: var(--r); padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.vcard .art { background: var(--soft); border-radius: 16px; display: grid; place-items: center; padding: 8px; }
.vcard .art svg { width: 100%; max-width: 120px; height: auto; }
.vcard .nm { font-size: 24px; font-weight: 700; font-family: 'Zen Maru Gothic', sans-serif; line-height: 1.2; }
.vcard .meta { display: flex; justify-content: space-between; align-items: flex-end; gap: 6px; }

.ex { background: var(--card); border-radius: var(--r); padding: 12px 14px; display: flex; align-items: center; gap: 12px; }
.ex + .ex { margin-top: 10px; }
.ex .jp { font-size: 18px; font-weight: 600; font-family: 'Zen Maru Gothic', sans-serif; }

/* Kanji */
.kbig { flex: none; width: 76px; height: 76px; border-radius: 20px; background: var(--soft); display: grid; place-items: center; font-size: 46px; font-family: 'Zen Maru Gothic', sans-serif; }
.kv { font-size: 14px; color: var(--ink2); }
.kv b { color: var(--ink); font-family: 'Zen Maru Gothic', sans-serif; font-weight: 600; }

/* Tablas y bloques */
.tbl { overflow-x: auto; background: var(--card); border-radius: var(--r); }
.tbl table { border-collapse: collapse; width: 100%; font-size: 15px; }
.tbl th { text-align: left; background: var(--soft); font-weight: 800; padding: 10px 14px; white-space: nowrap; }
.tbl td { padding: 10px 14px; vertical-align: top; }
.tbl tr + tr td { background: var(--card); }
.tip { background: var(--mint-l); border-radius: var(--r); padding: 14px 16px; color: var(--ink); }
.tip b { color: var(--mint-ink); }
.prose > * + * { margin-top: 12px; }
.prose ul { display: grid; gap: 6px; }

/* Verbos */
.vtri { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.vtri > div { background: var(--soft); border-radius: 14px; padding: 10px 8px; text-align: center; }
.vtri small { display: block; color: var(--ink2); font-size: 12px; font-weight: 700; }
.vtri .jp { font-size: 18px; font-weight: 700; display: block; }

/* Partículas */
.ptile { flex: none; min-width: 56px; height: 56px; padding: 0 10px; border-radius: 18px; background: var(--soft); display: grid; place-items: center; font-size: 28px; font-weight: 700; font-family: 'Zen Maru Gothic', sans-serif; }

/* Práctica */
.pcard { display: flex; align-items: center; gap: 14px; background: var(--card); border-radius: var(--r); padding: 14px 16px; color: var(--ink); }
.pcard .ic { flex: none; width: 48px; height: 48px; border-radius: 16px; background: var(--mint-l); color: var(--mint-ink); display: grid; place-items: center; font-size: 22px; font-weight: 800; font-family: 'Zen Maru Gothic', sans-serif; }
.pcard .t { font-weight: 800; }
.pcard .s { color: var(--ink2); font-size: 14px; }

/* Quiz */
.qz > * + * { margin-top: 16px; }
.qz-top { display: flex; align-items: center; gap: 12px; color: var(--ink2); font-weight: 700; font-size: 14px; }
.qz-top .bar { flex: 1; }
.qz-q { font-size: 20px; font-weight: 800; line-height: 1.35; white-space: pre-line; }
.qz-big { font-size: 64px; text-align: center; font-family: 'Zen Maru Gothic', sans-serif; font-weight: 700; background: var(--card); border-radius: var(--r); padding: 18px 8px; line-height: 1.2; }
.qz-art { background: var(--soft); border-radius: var(--r); display: grid; place-items: center; padding: 14px; }
.qz-art svg { width: 140px; height: 140px; }
.qz-pass { background: var(--card); border-radius: var(--r); padding: 16px; white-space: pre-line; font-family: 'Zen Maru Gothic', sans-serif; font-size: 17px; line-height: 1.7; }
.opts { display: grid; gap: 10px; }
.opt { border: 0; background: var(--card); border-radius: 18px; padding: 14px 16px; text-align: left; font-weight: 700; font-size: 17px; display: flex; align-items: center; justify-content: space-between; gap: 10px; font-family: 'Zen Maru Gothic', 'Nunito', sans-serif; }
.opt .rj { font-family: 'Nunito', sans-serif; }
.opt.sel { background: var(--mint-m); }
.opt.ok { background: var(--mint); color: var(--mint-ink); }
.opt.no { background: var(--soft); color: var(--ink2); text-decoration: line-through; }
.opt .mk { flex: none; font-weight: 800; }
.fb { background: var(--mint-l); border-radius: var(--r); padding: 14px 16px; }
.fb b { display: block; color: var(--mint-ink); }
.res-score { font-size: 56px; font-weight: 800; text-align: center; line-height: 1.1; }
.res-score small { font-size: 22px; color: var(--ink2); }

/* Formularios */
.field { display: grid; gap: 6px; }
.field label { font-weight: 800; font-size: 15px; }
.input, textarea.input { width: 100%; border: 0; background: var(--soft); border-radius: 16px; padding: 14px 16px; font: inherit; color: var(--ink); }
textarea.input { min-height: 140px; resize: vertical; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }
.avatar { width: 64px; height: 64px; border-radius: 999px; background: var(--mint); color: var(--mint-ink); display: grid; place-items: center; font-size: 28px; font-weight: 800; }
.msg { font-weight: 700; color: var(--mint-ink); }
.msg.err { color: var(--ink); background: var(--soft); border-radius: 14px; padding: 10px 14px; }
.sw { position: relative; flex: none; width: 52px; height: 30px; border-radius: 999px; background: var(--soft); border: 0; padding: 0; }
.sw::after { content: ''; position: absolute; top: 3px; left: 3px; width: 24px; height: 24px; border-radius: 999px; background: #fff; transition: transform .15s; }
.sw[aria-checked="true"] { background: var(--mint-d); }
.sw[aria-checked="true"]::after { transform: translateX(22px); }

/* Barra inferior flotante */
.bottom { position: fixed; left: 50%; transform: translateX(-50%); bottom: max(14px, env(safe-area-inset-bottom)); width: min(420px, calc(100% - 32px)); background: #FFFFFF; border-radius: 28px; padding: 8px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 2px; box-shadow: 0 8px 28px rgba(43, 42, 51, .14); z-index: 10; }
.bottom a { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px; border-radius: 22px; color: var(--ink2); font-size: 12px; font-weight: 700; }
.bottom a svg { width: 24px; height: 24px; color: var(--icon); }
.bottom a.on { background: var(--mint-l); color: var(--mint-ink); }

.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: 110px; background: var(--ink); color: #fff; border-radius: 999px; padding: 10px 18px; font-weight: 700; font-size: 14px; z-index: 20; max-width: calc(100% - 32px); text-align: center; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* ---------- Listas y composición reutilizable ---------- */
.list { display: grid; gap: 10px; }
.list > * { margin-top: 0 !important; }
.hero > * + * { margin-top: 16px; }
.jlpt > * + * { margin-top: 12px; }
.appbar { display: block; }

/* ---------- Tablet y escritorio (≥ 700px): ancho fluido hasta 1024px ---------- */
@media (min-width: 700px) {
  .app { max-width: 1024px; padding-left: max(clamp(24px, 4vw, 48px), env(safe-area-inset-left, 0px)); padding-right: max(clamp(24px, 4vw, 48px), env(safe-area-inset-right, 0px)); }
  main { padding-bottom: 130px; }
  .h1 { font-size: 34px; }
  .view { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; align-items: start; }
  .view > * { grid-column: 1 / -1; margin-top: 0 !important; }
  .view > .tile { grid-column: auto; height: 100%; }
  .view > .back, .view > .btn.block { justify-self: start; }
  .view > .btn.block { width: auto; min-width: 280px; }
  .view > .h2 { margin-top: 8px !important; }
  .view.narrow { max-width: 760px; margin-left: auto; margin-right: auto; width: 100%; }
  .view.narrow > .btn.block { width: 100%; }
  .prose { max-width: 760px; }
  .list { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
  .view.narrow .list { grid-template-columns: 1fr; }

  /* Inicio */
  .hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 32px; align-items: center; }
  .hero > * + * { margin-top: 0; }
  .hero .h1 { font-size: 40px; }
  .gmods { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
  .jlpt { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
  .jlpt > * + * { margin-top: 0; }
  .jlpt .pcard { width: 360px; max-width: 100%; }

  /* Lecciones */
  .vgrid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px; }
  .ngrid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .ngrid2 { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .kgrid { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 12px; }

  .vlist { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); gap: 16px; }

  /* Tests */
  .view.narrow .opts { grid-template-columns: 1fr 1fr; }
}

/* ---------- Escritorio (≥ 900px): la navegación pasa arriba, junto al logo ---------- */
@media (min-width: 900px) {
  main { padding-bottom: 64px; }
  .appbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; position: sticky; top: 0; z-index: 10; background: var(--bg); padding: 14px 0; margin-bottom: 8px; }
  .top { padding: 0; }
  .bottom { position: static; transform: none; width: auto; bottom: auto; display: flex; gap: 4px; padding: 6px; border-radius: 999px; box-shadow: 0 4px 18px rgba(43, 42, 51, .10); }
  .bottom a { flex-direction: row; gap: 8px; padding: 10px 18px; border-radius: 999px; font-size: 15px; }
  .bottom a svg { width: 22px; height: 22px; }
  .toast { bottom: 32px; }
}

.hi { font-size: .62em; font-weight: 700; margin-left: 8px; white-space: nowrap; }