@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700&family=Crimson+Text:ital,wght@0,400;0,600;1,400&display=swap');

  :root{
    /* Paleta neutra para la pantalla de inicio (no ligada a ningún libro) */
    --home-bg-0:#100e1a;
    --home-bg-1:#1c1830;
    --home-bg-2:#2a2344;
    --home-ink:#ece7f5;
    --home-mist:#a79fc2;
    --home-gold:#c9a24b;
    --home-gold-bright:#e0bd6b;
    --home-violet:#7d63c9;

    /* Paleta por defecto (se sobreescribe con clases de tema) */
    --ash-0:#0e0d0c;
    --ash-1:#1c1a18;
    --ash-2:#2b2724;
    --mist:#8f9494;
    --parchment:#e9e2d3;
    --accent:#b5651d;
    --accent-bright:#d97a2b;
    --pewter:#9a9a92;
    --tin-blue:#5b7a8c;
    --wrong:#7a2e2e;
    --correct:#4a6b3a;
  }

  *{box-sizing:border-box; margin:0; padding:0;}

  body{
    min-height:100vh;
    background:
      radial-gradient(ellipse at 20% -10%, rgba(125,99,201,0.10), transparent 55%),
      radial-gradient(ellipse at 80% 110%, rgba(201,162,75,0.06), transparent 55%),
      var(--home-bg-0);
    color:var(--home-ink);
    font-family:'Crimson Text', serif;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:32px 16px;
    position:relative;
    overflow-x:hidden;
    transition:background 0.5s ease;
  }

  /* Cuando hay un libro activo, el fondo general adopta su tono ambiental */

  /* Paletas de tema por libro, aplicadas dentro de #bookContainer */

  /* Capa de partículas ambientales (ceniza / lluvia de tormenta / estrellas) */
  .particle-layer{
    position:fixed; inset:0; pointer-events:none; z-index:0;
  }
  .flake{
    position:absolute; top:-10px; width:3px; height:3px;
    border-radius:50%; opacity:0.5;
    animation:fall linear infinite;
  }
  @keyframes fall{ to{ transform:translateY(110vh) translateX(20px); } }

  .stormdrop{
    position:absolute; top:-20px; width:2px; height:16px;
    opacity:0.4; animation:stormfall linear infinite;
  }
  @keyframes stormfall{ to{ transform:translate(-60px, 115vh); } }

  .star{
    position:absolute; width:2px; height:2px; background:var(--home-gold-bright);
    border-radius:50%; animation:twinkle ease-in-out infinite alternate;
  }
  @keyframes twinkle{ from{ opacity:0.15; } to{ opacity:0.85; } }

  /* ===================== PANTALLA DE INICIO (neutra) ===================== */
  #homeScreen, #sagaScreen{
    position:relative; z-index:1;
    width:100%; max-width:720px;
    text-align:center;
  }
  #sagaScreen{ text-align:left; }
  #sagaScreen .home-title, #sagaScreen .home-eyebrow{ text-align:left; }
  #sagaScreen .home-subtitle{ text-align:left; margin-left:0; }
  .home-eyebrow{
    font-family:'Cinzel', serif; font-size:12px; letter-spacing:0.4em;
    text-transform:uppercase; color:var(--home-gold-bright); margin-bottom:10px;
  }
  .home-title{
    font-family:'Cinzel', serif; font-size:34px; font-weight:700;
    color:var(--home-ink); letter-spacing:0.02em; margin-bottom:12px;
  }
  .home-subtitle{
    font-style:italic; color:var(--home-mist); font-size:16px;
    max-width:480px; margin:0 auto 40px; line-height:1.6;
  }
  .search-wrap{
    max-width:420px;
    margin:0 auto 36px;
  }
  .search-input{
    width:100%;
    background:linear-gradient(180deg, var(--home-bg-1), var(--home-bg-2));
    border:1px solid rgba(201,162,75,0.25);
    border-radius:4px;
    padding:13px 18px;
    font-family:'Crimson Text', serif;
    font-size:15px;
    color:var(--home-ink);
    outline:none;
    transition:border-color 0.2s, box-shadow 0.2s;
  }
  .search-input::placeholder{
    color:var(--home-mist);
    font-style:italic;
  }
  .search-input:focus{
    border-color:var(--home-gold-bright);
    box-shadow:0 0 0 3px rgba(201,162,75,0.15);
  }
  .search-empty{
    text-align:center;
    color:var(--home-mist);
    font-style:italic;
    font-size:15px;
    padding:30px 20px;
    grid-column:1/-1;
  }

  /* Barra de perfil e historial */
  .profile-bar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:10px;
    max-width:640px;
    margin:0 auto 24px;
    flex-wrap:wrap;
  }
  .profile-btn{
    background:linear-gradient(180deg, var(--home-bg-1), var(--home-bg-2));
    border:1px solid rgba(201,162,75,0.25);
    border-radius:4px;
    padding:8px 14px;
    font-family:'Crimson Text', serif;
    font-size:13.5px;
    color:var(--home-ink);
    cursor:pointer;
    transition:border-color 0.2s;
  }
  .profile-btn:hover{ border-color:var(--home-gold-bright); }
  .profile-name-form{
    display:flex;
    gap:8px;
  }
  .profile-name-input{
    background:var(--home-bg-1);
    border:1px solid rgba(201,162,75,0.3);
    border-radius:4px;
    padding:8px 12px;
    font-family:'Crimson Text', serif;
    font-size:13.5px;
    color:var(--home-ink);
    outline:none;
    width:160px;
  }
  .profile-name-input:focus{ border-color:var(--home-gold-bright); }

  /* Pantalla de historial */
  #historyScreen{
    position:relative; z-index:1;
    width:100%; max-width:640px;
    text-align:left;
  }
  #historyScreen .home-eyebrow, #historyScreen .home-title{ text-align:left; }
  #historyScreen .home-subtitle{ text-align:left; margin-left:0; }
  .history-empty{
    color:var(--home-mist);
    font-style:italic;
    font-size:15px;
    padding:30px 0;
  }
  .history-stat-row{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(140px, 1fr));
    gap:14px;
    margin-bottom:28px;
  }
  .history-stat-card{
    background:linear-gradient(180deg, var(--home-bg-1), var(--home-bg-2));
    border:1px solid rgba(201,162,75,0.2);
    border-radius:4px;
    padding:16px;
    text-align:center;
  }
  .history-stat-card .stat-value{
    font-family:'Cinzel', serif;
    font-size:22px;
    color:var(--home-gold-bright);
  }
  .history-stat-card .stat-label{
    font-size:12px;
    color:var(--home-mist);
    font-style:italic;
    margin-top:4px;
  }
  .history-list{
    display:flex;
    flex-direction:column;
    gap:10px;
  }
  .history-entry{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    background:linear-gradient(180deg, var(--home-bg-1), var(--home-bg-2));
    border:1px solid rgba(201,162,75,0.15);
    border-radius:4px;
    padding:12px 16px;
  }
  .history-entry .entry-book{
    font-family:'Cinzel', serif;
    font-size:13.5px;
    color:var(--home-ink);
  }
  .history-entry .entry-date{
    font-size:12px;
    color:var(--home-mist);
    font-style:italic;
    margin-top:2px;
  }
  .history-entry .entry-score{
    font-family:'Cinzel', serif;
    font-size:15px;
    color:var(--home-gold-bright);
    white-space:nowrap;
  }

  .book-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
    gap:20px;
  }

  .saga-section{
    text-align:left;
    margin-bottom:36px;
  }
  .saga-heading{
    display:flex;
    align-items:baseline;
    gap:10px;
    margin-bottom:16px;
    padding-bottom:8px;
    border-bottom:1px solid rgba(201,162,75,0.18);
  }
  .saga-name{
    font-family:'Cinzel', serif;
    font-size:15px;
    letter-spacing:0.12em;
    text-transform:uppercase;
    color:var(--home-gold-bright);
  }
  .saga-tag{
    font-family:'Crimson Text', serif;
    font-style:italic;
    font-size:13px;
    color:var(--home-mist);
  }
  .standalone-heading{
    font-family:'Cinzel', serif;
    font-size:13px;
    letter-spacing:0.15em;
    text-transform:uppercase;
    color:var(--home-mist);
    margin-bottom:16px;
    text-align:left;
  }
  .book-card{
    background:linear-gradient(180deg, var(--home-bg-1), var(--home-bg-2));
    border:1px solid rgba(201,162,75,0.2);
    border-radius:6px;
    padding:28px 22px;
    cursor:pointer;
    text-align:left;
    transition:transform 0.2s, border-color 0.2s, box-shadow 0.2s;
    display:flex; flex-direction:column; gap:10px;
  }
  .book-card:hover{
    transform:translateY(-4px);
    border-color:var(--home-gold-bright);
    box-shadow:0 20px 40px -15px rgba(0,0,0,0.6);
  }
  .book-card .icon{ font-size:30px; }
  .book-card .book-title{
    font-family:'Cinzel', serif; font-size:16px; color:var(--home-ink); letter-spacing:0.02em;
  }
  .book-card .book-author{
    font-family:'Crimson Text', serif; font-size:12.5px; color:var(--home-gold);
    text-transform:uppercase; letter-spacing:0.08em; margin-top:-4px;
  }
  .book-card .book-desc{
    font-size:14px; color:var(--home-mist); font-style:italic; line-height:1.5;
  }
  .book-card .book-cta{
    margin-top:auto; padding-top:10px;
    font-family:'Cinzel', serif; font-size:11px; letter-spacing:0.15em;
    text-transform:uppercase; color:var(--home-gold-bright);
  }
  .book-card.disabled{
    opacity:0.4; cursor:default;
  }
  .book-card.disabled:hover{
    transform:none; border-color:rgba(201,162,75,0.2); box-shadow:none;
  }
  .book-card.locked{
    opacity:0.55; cursor:default; position:relative;
  }
  .book-card.locked:hover{
    transform:none; border-color:rgba(201,162,75,0.2); box-shadow:none;
  }
  .book-card .lock-icon{
    font-size:22px; margin-bottom:2px;
  }
  .book-card .unlock-requirement{
    margin-top:auto; padding-top:10px;
    font-family:'Crimson Text', serif; font-size:12px; font-style:italic;
    color:var(--home-mist); letter-spacing:0.02em;
  }
  .unlock-banner{
    margin:14px auto 0;
    max-width:420px;
    padding:14px 18px;
    border-radius:4px;
    background:linear-gradient(180deg, rgba(201,162,75,0.16), rgba(201,162,75,0.06));
    border:1px solid rgba(201,162,75,0.35);
    color:var(--parchment);
    font-family:'Crimson Text', serif;
    font-size:14.5px;
    text-align:center;
  }
  .book-card.featured{
    border-color:rgba(201,162,75,0.45);
    background:linear-gradient(180deg, var(--home-bg-2), var(--home-bg-1));
  }
  .book-card.featured .book-cta{ color:var(--home-gold-bright); }

  /* ===================== TARJETA DE LIBRO / QUIZ ===================== */
  #bookContainer{
    position:relative; z-index:1;
    width:100%; max-width:620px;
  }
  .back-link{
    display:inline-flex; align-items:center; gap:6px;
    font-family:'Cinzel', serif; font-size:11px; letter-spacing:0.15em;
    text-transform:uppercase; color:var(--mist);
    background:none; border:none; cursor:pointer;
    margin-bottom:14px; padding:0;
    transition:color 0.2s;
  }
  .back-link:hover{ color:var(--accent-bright); }

  .card{
    background:linear-gradient(180deg, var(--ash-1), var(--ash-2));
    border:1px solid rgba(181,101,29,0.25);
    border-radius:4px;
    box-shadow:0 30px 60px -20px rgba(0,0,0,0.7), 0 0 0 1px rgba(0,0,0,0.4);
    overflow:hidden;
    color:var(--parchment);
  }

  .header{
    padding:28px 32px 20px;
    border-bottom:1px solid rgba(181,101,29,0.2);
    text-align:center;
  }

  .eyebrow{
    font-family:'Cinzel', serif; font-size:11px; letter-spacing:0.35em;
    text-transform:uppercase; color:var(--accent-bright); margin-bottom:8px;
  }
  h1{
    font-family:'Cinzel', serif; font-size:26px; font-weight:700;
    color:var(--parchment); letter-spacing:0.03em;
  }
  .book-author-tag{
    margin-top:4px; font-family:'Crimson Text', serif; font-size:13px;
    color:var(--pewter); text-transform:uppercase; letter-spacing:0.1em;
  }
  .subtitle{
    margin-top:6px; font-style:italic; color:var(--pewter); font-size:15px;
  }

  .progress-track{ height:3px; background:var(--ash-0); position:relative; }
  .progress-fill{
    height:100%; background:linear-gradient(90deg, var(--accent), var(--accent-bright));
    transition:width 0.4s ease;
  }

  .body{ padding:32px; }

  .qnum{
    font-family:'Cinzel', serif; font-size:12px; letter-spacing:0.2em;
    color:var(--tin-blue); margin-bottom:10px; text-transform:uppercase;
  }

  .timer-track{
    height:5px; width:100%; background:rgba(154,154,146,0.15);
    border-radius:3px; overflow:hidden; margin-bottom:20px;
  }
  .timer-fill{
    height:100%; width:0%;
    background:linear-gradient(90deg, var(--tin-blue), var(--accent-bright));
    border-radius:3px;
  }
  .timer-fill.danger{ background:linear-gradient(90deg, var(--accent-bright), var(--wrong)); }

  .question{ font-size:21px; line-height:1.4; color:var(--parchment); margin-bottom:24px; }

  .options{ display:flex; flex-direction:column; gap:10px; }

  .option{
    text-align:left; background:rgba(255,255,255,0.02);
    border:1px solid rgba(154,154,146,0.25); color:var(--parchment);
    font-family:'Crimson Text', serif; font-size:16.5px;
    padding:14px 18px; border-radius:2px; cursor:pointer;
    transition:border-color 0.2s, background 0.2s, transform 0.15s;
    display:flex; align-items:center; gap:12px;
  }
  .option:hover:not(:disabled){
    border-color:var(--accent-bright); background:rgba(181,101,29,0.08); transform:translateX(2px);
  }
  .option:disabled{ cursor:default; }

  .option .marker{ font-family:'Cinzel', serif; font-size:12px; color:var(--pewter); width:18px; flex-shrink:0; }

  .option.correct{ border-color:var(--correct); background:rgba(74,107,58,0.18); }
  .option.correct .marker{ color:#8fbf6f; }
  .option.wrong{ border-color:var(--wrong); background:rgba(122,46,46,0.18); }
  .option.wrong .marker{ color:#d18888; }

  .feedback{
    margin-top:18px; font-style:italic; color:var(--tin-blue);
    font-size:14.5px; min-height:20px; line-height:1.5;
  }

  .footer-nav{ margin-top:26px; display:flex; justify-content:flex-end; }

  .btn{
    font-family:'Cinzel', serif; font-size:12px; letter-spacing:0.15em;
    text-transform:uppercase; background:transparent; border:1px solid var(--accent-bright);
    color:var(--accent-bright); padding:11px 22px; border-radius:2px; cursor:pointer;
    transition:background 0.2s, color 0.2s; opacity:0; pointer-events:none;
  }
  .btn.show{ opacity:1; pointer-events:auto; }
  .btn:hover{ background:var(--accent-bright); color:var(--ash-0); }

  /* Pantalla de inicio de cada libro */
  .start-screen{ text-align:center; padding:36px 32px 32px; }
  .start-emblem{ font-size:44px; margin-bottom:18px; }
  .start-text{
    color:var(--parchment); font-size:17px; line-height:1.6;
    max-width:440px; margin:0 auto 22px;
  }
  .start-rules{
    list-style:none; display:flex; flex-direction:column; gap:10px;
    max-width:380px; margin:0 auto 30px; text-align:left;
  }
  .start-rules li{
    font-size:14.5px; color:var(--mist); font-style:italic;
    padding-left:22px; position:relative;
  }
  .start-rules li::before{
    content:"◆"; position:absolute; left:0; color:var(--accent-bright);
    font-size:10px; top:5px;
  }

  /* Resultado */
  .result{ text-align:center; padding:8px 8px 4px; }
  .result-metal{ font-size:52px; margin-bottom:6px; }
  .result-title{ font-family:'Cinzel', serif; font-size:22px; color:var(--accent-bright); margin-bottom:8px; }
  .result-score{ font-size:18px; color:var(--parchment); margin-bottom:14px; }
  .result-desc{
    font-style:italic; color:var(--mist); font-size:15px;
    max-width:440px; margin:0 auto 28px; line-height:1.6;
  }
  .result-actions{
    display:flex; gap:12px; justify-content:center; flex-wrap:wrap;
  }
  .restart{
    font-family:'Cinzel', serif; font-size:12px; letter-spacing:0.15em;
    text-transform:uppercase; background:var(--accent); border:none;
    color:var(--ash-0); padding:13px 28px; border-radius:2px; cursor:pointer;
    transition:background 0.2s;
  }
  .restart:hover{ background:var(--accent-bright); }
  .restart.secondary{
    background:transparent; border:1px solid var(--pewter); color:var(--parchment);
  }
  .restart.secondary:hover{ background:rgba(255,255,255,0.06); }

  .hidden{ display:none; }