:root {
      --bg: #FAF7F2;
      --fg: #2D2926;
      --muted: #8A857D;
      --accent: #C75B39;
      --accent-light: #E8D5CE;
      --secondary: #5B8A72;
      --card: #FFFFFF;
      --border: #E5DED6;
    }

    * { font-family: 'DM Sans', sans-serif; box-sizing: border-box; }
    .font-display { font-family: 'Fraunces', serif; }
    body { background: var(--bg); color: var(--fg); margin: 0; overflow-x: hidden; }
    
    /* Animations */
    .reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    
    /* Deck Modal Styles */
    #deckModal {
      position: fixed; inset: 0; z-index: 100;
      background: var(--bg);
      transform: translateY(100%);
      transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
      overflow: hidden;
    }
    #deckModal.open { transform: translateY(0); }
    
    .deck-slide {
      position: absolute; inset: 0;
      opacity: 0;
      pointer-events: none;
      transform: translateX(100%);
      transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.5s ease;
    }
    .deck-slide.active {
      opacity: 1; pointer-events: auto; transform: translateX(0);
    }
    .deck-slide.visited { transform: translateX(-100%); }

    /* Buttons */
    .btn-primary {
      background: var(--accent); color: white;
      transition: all 0.3s ease; cursor: pointer;
    }
    .btn-primary:hover { background: #B04D2F; transform: translateY(-2px); box-shadow: 0 10px 20px -5px rgba(199, 91, 57, 0.3); }
    
    .btn-ghost {
      background: transparent; color: var(--fg);
      border: 1px solid var(--border);
      transition: all 0.3s ease; cursor: pointer;
    }
    .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

    .card-hover { transition: transform 0.3s ease, box-shadow 0.3s ease; }
    .card-hover:hover { transform: translateY(-5px); box-shadow: 0 20px 40px -10px rgba(45, 41, 38, 0.1); }

    /* Custom Scrollbar */
    ::-webkit-scrollbar { width: 6px; height: 6px; }
    ::-webkit-scrollbar-track { background: var(--bg); }
    ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
    ::-webkit-scrollbar-thumb:hover { background: var(--muted); }


    .book-slider {
    position: relative;
}

.book-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: scale(0.9) translateY(20px);
    transition: 0.6s ease;
}

.book-slide.active {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.card-inner {
    width: 100%;
    height: 100%;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.title {
    font-size: 18px;
    font-weight: 600;
}

.author {
    font-size: 14px;
    color: var(--muted);
}

.progress {
    margin-top: auto;
    height: 6px;
    background: #eee;
    border-radius: 10px;
    overflow: hidden;
}

.progress span {
    display: block;
    height: 100%;
    background: var(--secondary);
}