* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: #2c3e50;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* Toolbar dei Controlli */
.toolbar {
    background-color: #1a252f;
    color: #ecf0f1;
    padding: 10px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    z-index: 10;
}

.nav-btn {
    background-color: #34495e;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: background-color 0.2s;
}

.nav-btn:hover {
    background-color: #415b76;
}

#page-counter {
    font-size: 14px;
    font-weight: 500;
    min-width: 180px;
    text-align: center;
}

/* Area Flipbook */
.canvas-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background-color: #233140;
}

.flipbook {
    box-shadow: 0 20px 45px rgba(0,0,0,0.6);
    background-color: #fff;
    visibility: hidden;
    transition: width 0.3s ease-in-out; /* Transizione morbida tra pagina singola e doppia */
}

.page {
    background-color: white;
    width: 100%;
    height: 100%;
    position: absolute;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
}