:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e7e9ee;
  --muted: #8b93a3;
  --accent: #ff5c73;      /* rojo/rosa japonés */
  --accent-2: #4aa8ff;
  --good: #4ad07a;
  --warn: #f5c451;
  --new: #4aa8ff;         /* palabra nueva (azul) */
  --learning: #f5c451;    /* aprendiendo (amarillo) */
  --radius: 12px;
  --font-jp: "Yu Gothic", "Meiryo", "MS Gothic", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
}

/* ---------- Barra superior ---------- */
.topbar {
  display: flex; align-items: center; gap: 20px;
  padding: 10px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.brand { font-weight: 700; font-size: 20px; font-family: var(--font-jp); }
.brand span { color: var(--accent); font-size: 12px; font-weight: 600; letter-spacing: 1px; }

.tabs { display: flex; gap: 6px; margin-left: 10px; }
.tab {
  background: transparent; border: none; color: var(--muted);
  padding: 8px 16px; border-radius: 999px; cursor: pointer;
  font-size: 14px; font-weight: 600;
}
.tab:hover { color: var(--text); background: var(--panel-2); }
.tab.active { color: #fff; background: var(--accent); }

.status { margin-left: auto; display: flex; align-items: center; gap: 18px; }
.streak { font-weight: 700; }
.streak span { color: var(--warn); }

.timer { display: flex; align-items: center; gap: 8px; }
.timer-ring { position: relative; width: 44px; height: 44px; }
.timer-ring svg { width: 44px; height: 44px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--border); stroke-width: 3; }
.ring-fg { fill: none; stroke: var(--good); stroke-width: 3; stroke-linecap: round;
           stroke-dasharray: 100 100; stroke-dashoffset: 100; transition: stroke-dashoffset .4s; }
.timer-text {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-variant-numeric: tabular-nums; color: var(--muted);
}
.timer-btn {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  cursor: pointer; font-size: 12px;
}
.timer-btn.running { background: var(--accent); border-color: var(--accent); color: #fff; }
/* Auto-pausa por inactividad: atenúa el anillo y muestra un indicador de siesta. */
.timer.auto-paused .timer-ring { opacity: .45; }
.timer.auto-paused::after {
  content: '💤'; font-size: 13px; margin-left: -2px;
  animation: fade .3s;
}

/* ---------- Vistas ---------- */
main { padding: 24px; max-width: 1000px; margin: 0 auto; }
.view { display: none; }
.view.active { display: block; animation: fade .2s; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; } }

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 24px 0 12px; }
.subtle { color: var(--muted); font-size: 13px; }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
}
.card.pad-lg { padding: 28px; }

.btn {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 9px 16px; border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 600;
}
.btn:hover { border-color: var(--muted); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

input[type=text], input[type=url], textarea, select {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 12px; border-radius: 8px; font-size: 14px; width: 100%;
  font-family: inherit;
}
textarea { min-height: 120px; resize: vertical; font-family: var(--font-jp); }

/* Japonés */
.jp { font-family: var(--font-jp); }
ruby rt { font-size: .55em; color: var(--muted); }

/* Fichas de estado */
.pill { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.pill.due { background: rgba(245,196,81,.15); color: var(--warn); }
.pill.ok { background: rgba(74,208,122,.15); color: var(--good); }
.pill.off { background: rgba(139,147,163,.15); color: var(--muted); }

/* Estadística grande */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.stat { background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .num { font-size: 28px; font-weight: 700; }
.stat .lbl { color: var(--muted); font-size: 12px; margin-top: 2px; }

/* ---------- Gramática ---------- */
.grammar-hero { text-align: center; padding: 30px 20px; }
.grammar-hero .big-jp { font-size: 34px; font-family: var(--font-jp); margin: 8px 0; }
.example { padding: 12px 14px; background: var(--panel-2); border-radius: 8px; margin: 8px 0; }
.example .ex-jp { font-size: 20px; font-family: var(--font-jp); }
.example .ex-tr { color: var(--muted); font-size: 14px; margin-top: 4px; }
.explanation { line-height: 1.7; }
.explanation p { margin: 0 0 10px; }
.grade-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 16px; }
.grade-buttons .btn { text-align: center; }
.g-again { color: var(--accent); }
.g-hard { color: var(--warn); }
.g-good { color: var(--good); }
.g-easy { color: var(--accent-2); }

/* ---------- Ejercicios de rellenar huecos (estilo Bunpro) ---------- */
.exercise .ex-top { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.ex-concept { margin-left: auto; max-width: 60%; overflow: hidden;
              text-overflow: ellipsis; white-space: nowrap; }
.ex-prompt { font-size: 16px; color: var(--text); background: var(--panel-2);
             border: 1px solid var(--border); border-radius: 8px;
             padding: 10px 14px; margin-bottom: 16px; }
.ex-sentence { font-size: 24px; line-height: 1.9; text-align: center;
               margin: 10px 0 16px; word-break: break-word; }
.ex-input {
  display: inline-block; width: 5.5em; min-width: 4em; text-align: center;
  font-family: var(--font-jp); font-size: 22px; padding: 2px 8px;
  margin: 0 4px; vertical-align: baseline;
  border: none; border-bottom: 2px solid var(--accent-2); border-radius: 4px 4px 0 0;
  background: var(--panel-2); color: var(--text);
}
.ex-input:focus { outline: none; border-bottom-color: var(--accent); }
.ex-input.ok { border-bottom-color: var(--good); color: var(--good); }
.ex-input.bad { border-bottom-color: var(--accent); color: var(--accent); }
.ex-hintbtn { padding: 4px 10px; font-size: 13px; margin-bottom: 8px; }
.ex-hint { margin: 0 0 10px; }
.ex-feedback:not(:empty) { margin: 6px 0 14px; }
.fb { font-weight: 700; font-size: 16px; margin-bottom: 10px; }
.fb.ok { color: var(--good); }
.fb.bad { color: var(--accent); }
.ex-complete { font-size: 22px; text-align: center; padding: 12px;
               background: var(--panel-2); border-radius: 8px; }
.ex-actions { display: flex; gap: 10px; align-items: center; }
.ex-actions .btn-primary { min-width: 140px; }

/* Lista de conceptos para práctica libre */
.concept-filter { margin-top: 6px; }
.concept-list { display: flex; flex-direction: column; gap: 8px; max-height: 360px; overflow-y: auto; }
.concept-item { display: flex; align-items: center; gap: 12px; padding: 10px 12px;
                background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; }
.concept-info { flex: 1; min-width: 0; }
.concept-title { font-weight: 600; }
.concept-item .pill { flex: none; }

/* ---------- Lectura ---------- */
.reader { }
.seg { padding: 6px 10px; border-radius: 6px; cursor: default; line-height: 2.1; }
.seg.active { background: rgba(74,168,255,.12); }
.seg .seg-time { color: var(--muted); font-size: 11px; margin-right: 8px; cursor: pointer;
                 user-select: none; -webkit-user-select: none; }
.tok { font-family: var(--font-jp); font-size: 20px; cursor: pointer; border-radius: 4px;
       padding: 0 1px; border-bottom: 2px solid transparent; }
.tok.content:hover { background: rgba(255,255,255,.08); }
.tok.new { border-bottom-color: var(--new); }
.tok.learning { border-bottom-color: var(--learning); background: rgba(245,196,81,.10); }
.tok.known { border-bottom-color: transparent; }
.reader-audio { position: sticky; bottom: 0; background: var(--panel);
                border-top: 1px solid var(--border); padding: 10px; margin: 0 -24px -24px; }
.reader-audio audio { width: 100%; }
.doc-item { display: flex; align-items: center; gap: 12px; padding: 12px 14px;
            background: var(--panel-2); border: 1px solid var(--border);
            border-radius: 8px; margin-bottom: 8px; cursor: pointer; }
.doc-item:hover { border-color: var(--muted); }
.doc-item .doc-title { font-weight: 600; }
.doc-item .doc-meta { color: var(--muted); font-size: 12px; }
/* Estado de lectura en la biblioteca */
.doc-badge { font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 999px;
             white-space: nowrap; }
.doc-badge.read { color: var(--good); background: rgba(74,208,122,.12); }
.doc-badge.progress { color: var(--accent-2); background: rgba(74,168,255,.12); }
.doc-item .read-toggle { font-size: 14px; }
.doc-item .read-toggle.on { color: var(--good); }
.doc-item .doc-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Carpetas de la biblioteca */
.lib-head { display: flex; align-items: center; margin: 24px 0 12px; }
.new-folder-row { display: flex; gap: 8px; margin-bottom: 12px; }
.new-folder-row input { flex: 1; }
.folder-sec { margin-bottom: 10px; }
.folder-head { display: flex; align-items: center; gap: 8px; padding: 9px 12px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; user-select: none; -webkit-user-select: none; }
.folder-head:hover { border-color: var(--muted); }
.folder-caret { width: 12px; color: var(--muted); font-size: 12px; }
.folder-icon { font-size: 16px; }
.folder-name { font-weight: 700; }
.folder-count { color: var(--muted); font-size: 12px; background: var(--panel-2);
  padding: 1px 9px; border-radius: 999px; }
.folder-head .btn { padding: 4px 9px; font-size: 13px; }
.folder-rename-input { flex: 1; max-width: 260px; padding: 5px 9px; font-size: 14px; }
.folder-body { padding: 8px 0 2px 12px; }
.folder-sec.collapsed .folder-body { display: none; }
.doc-item .doc-folder { width: auto; max-width: 140px; padding: 6px 8px; font-size: 12px; }

/* ---------- Popup diccionario ---------- */
.dict-popup {
  position: fixed; z-index: 100; width: 340px; max-width: 90vw;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: 0 12px 40px rgba(0,0,0,.5);
  padding: 14px;
}
.dict-popup.hidden { display: none; }
.dict-head { display: flex; align-items: baseline; gap: 10px; }
.dict-word { font-size: 26px; font-family: var(--font-jp); font-weight: 700; }
.dict-reading { color: var(--accent-2); font-size: 15px; }
.dict-close { margin-left: auto; background: none; border: none; color: var(--muted);
              cursor: pointer; font-size: 15px; }
.dict-body { margin: 10px 0; max-height: 240px; overflow-y: auto; }
.dict-sense { margin: 0 0 8px; }
.dict-sense .pos { color: var(--muted); font-size: 12px; }
.dict-lang-tag { font-size: 11px; font-weight: 700; color: var(--accent);
                 text-transform: uppercase; letter-spacing: .5px; margin: 6px 0 2px; }
.dict-actions { display: flex; gap: 8px; }
.dict-actions .btn { flex: 1; }

/* ---------- Barra de selección de frase (traducir + Anki) ---------- */
.sel-toolbar {
  position: fixed; z-index: 120; width: 320px; max-width: 92vw;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: 0 12px 40px rgba(0,0,0,.5);
  padding: 12px 14px;
}
.sel-toolbar.hidden { display: none; }
.sel-close { position: absolute; top: 8px; right: 10px; background: none; border: none;
             color: var(--muted); cursor: pointer; font-size: 16px; line-height: 1; }
.sel-text { font-size: 16px; font-family: var(--font-jp); margin: 2px 24px 10px 0; }
.sel-body { display: flex; flex-direction: column; gap: 10px; }
.sel-body .btn { width: 100%; }
.sel-translation { background: var(--panel-2); border: 1px solid var(--border);
                   border-radius: 8px; padding: 10px 12px; font-size: 15px; color: var(--text); }
.sel-btnrow { display: flex; gap: 8px; }
.sel-btnrow .btn { flex: 1; }
.sel-analysis:not(:empty) { max-height: 42vh; overflow-y: auto; border-top: 1px solid var(--border);
                            padding-top: 10px; margin-top: 2px; }
.an-grammar { font-size: 14px; line-height: 1.5; color: var(--text); margin-bottom: 10px; white-space: pre-wrap; }
.an-breakdown { display: flex; flex-direction: column; gap: 6px; }
.an-row { display: grid; grid-template-columns: auto auto 1fr; gap: 8px; align-items: baseline;
          font-size: 13px; border-bottom: 1px solid var(--border); padding-bottom: 5px; }
.an-w { font-family: var(--font-jp); font-size: 15px; }
.an-r { color: var(--accent-2); }
.an-m { color: var(--muted); }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 12px 20px; border-radius: 10px; z-index: 200; box-shadow: 0 8px 30px rgba(0,0,0,.4);
}
.toast.hidden { display: none; }
.toast.err { border-color: var(--accent); }
.toast.ok { border-color: var(--good); }

/* Barra de progreso */
.progress { height: 8px; background: var(--panel-2); border-radius: 999px; overflow: hidden; margin: 10px 0; }
.progress-fill { height: 100%; background: var(--good); border-radius: 999px; transition: width .3s; }

/* Fichas de mazo (Anki) */
.deck-card { }
.deck-name { font-weight: 700; font-size: 16px; font-family: var(--font-jp); }
.deck-counts { display: flex; gap: 14px; font-size: 13px; }
.cnt-new { color: var(--accent-2); }
.cnt-learn { color: var(--warn); }
.cnt-rev { color: var(--good); }

/* Repaso de carta Anki */
.anki-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 16px; margin: 10px 0; min-height: 96px;
  /* Tope de altura: las cartas largas (frase + imagen) hacen scroll DENTRO de
     la tarjeta en vez de empujar los botones de calificar fuera de pantalla. */
  max-height: 44vh; overflow-y: auto;
  display: flex; align-items: safe center; justify-content: center;
}
.audio-row { display: flex; gap: 10px; justify-content: center; margin-bottom: 12px; }
.review-footer { margin-top: 8px; }
.review-footer .grade-buttons { margin-top: 0; }
.grade-int { font-size: 11px; color: var(--muted); font-weight: 400; margin-top: 2px; }
.grade-buttons .btn { display: flex; flex-direction: column; align-items: center; padding: 10px 6px; }

/* Gestor de mazos */
.deck-list { max-height: 320px; overflow-y: auto; margin-top: 10px; }
.deck-check { display: flex; align-items: center; gap: 10px; padding: 8px 6px;
              border-bottom: 1px solid var(--border); cursor: pointer; }
.deck-check:hover { background: var(--panel-2); }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 150;
         display: flex; align-items: center; justify-content: center; }
.modal-box { background: var(--panel); border: 1px solid var(--border);
             border-radius: var(--radius); padding: 24px; width: 420px; max-width: 92vw;
             max-height: 90vh; overflow-y: auto; }
.fld { display: block; margin: 12px 0; font-size: 13px; color: var(--muted); }
.fld input, .fld select { margin-top: 6px; }

.hidden { display: none !important; }
.empty { text-align: center; color: var(--muted); padding: 40px 20px; }
.loader { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border);
          border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Frases al vuelo (captura escrita / grabada) ---------- */
.ph-rec-btn.recording { background: var(--accent); border-color: var(--accent); color: #fff;
                        animation: recpulse 1.2s ease-in-out infinite; }
@keyframes recpulse { 50% { box-shadow: 0 0 0 6px rgba(255,92,115,.25); } }
.ph-audio { width: 100%; margin-top: 10px; }
.ph-capture { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 14px; }
.ph-analysis { margin-top: 10px; }

/* ============================================================
   Móvil (iPhone y pantallas estrechas)
   ============================================================ */
@media (max-width: 640px) {
  body { font-size: 16px; }
  /* Sin destello gris al tocar botones/pestañas */
  .btn, .tab, button { -webkit-tap-highlight-color: transparent; }

  /* Barra superior: marca + estado en la 1ª fila; pestañas a lo ancho debajo.
     Respeta el notch/isla con safe-area cuando se abre a pantalla completa. */
  .topbar {
    flex-wrap: wrap; gap: 8px 10px;
    padding: calc(8px + env(safe-area-inset-top))
             calc(12px + env(safe-area-inset-right)) 8px
             calc(12px + env(safe-area-inset-left));
  }
  .brand { font-size: 17px; }
  .status { gap: 14px; }
  .tabs { order: 3; width: 100%; margin-left: 0; gap: 6px; }
  .tabs .tab { flex: 1; text-align: center; padding: 10px 4px; font-size: 13px; }

  main { padding: 16px 12px calc(20px + env(safe-area-inset-bottom)); }
  h1 { font-size: 20px; }
  .card { padding: 16px; }

  /* Controles cómodos para el dedo; 16px en inputs evita el zoom de iOS */
  .btn { padding: 12px 16px; }
  input[type=text], input[type=url], textarea, select { font-size: 16px; }

  /* Ejercicios de gramática: botón "Siguiente" a lo ancho, fácil de tocar */
  .ex-sentence { font-size: 20px; }
  .ex-actions { flex-direction: column; align-items: stretch; }
  .ex-actions .btn, .ex-actions .btn-primary { width: 100%; min-width: 0; }

  /* Repaso de Anki: algo más de alto para la carta y botones de calificar amplios */
  .anki-card { max-height: 46vh; }
  .grade-buttons { gap: 6px; }
  .grade-buttons .btn { padding: 12px 4px; font-size: 13px; }

  /* La barra de audio pegada del lector usa el nuevo padding de main */
  .reader-audio { margin: 0 -12px calc(-20px - env(safe-area-inset-bottom)); }

  /* Modales y paneles altos: que hagan scroll dentro y no se salgan */
  .modal-box { max-height: 88vh; overflow-y: auto; }
}