/* Reset und Basis-Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background: 
        url('/background.png') center/cover fixed;
    display: flex;
    flex-direction: column;
    height: 100vh;
    font-family: 'Arial', sans-serif;
    overflow: hidden;
    touch-action: pan-y pinch-zoom;
}

/* Flipbook Container */
#flipbook-container {
    background: transparent !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    overflow: visible !important;
    position: relative;
    margin: 0 auto;
    width: 100%;
    height: calc(100vh - 100px);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Flipbook selbst */
#flipbook {
    background: transparent !important;
    margin: 0 auto;
    max-width: 100%;
    max-height: 100%;
}

/* Seiten - Exakt Canvas-Größe */
#flipbook .page {
    background: white !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    box-shadow: 0 0 20px rgba(0,0,0,0.1) !important;
    margin: 0 !important;
    padding: 0 !important;
    background-color: white !important;
    overflow: hidden !important;
}

/* Canvas - Exakte PDF-Größe */
#flipbook .page canvas {
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: none !important;
    max-height: none !important;
}

/* Turn.js spezifische Anpassungen */
#flipbook .even,
#flipbook .odd {
    background: white !important;
}

/* Controls unten */
.controls-container {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #343436; /* 0xff343436 */
    padding: 15px 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    border-radius: 8px; /* BorderRadius.circular(8) */
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
    z-index: 1000;
}

.navigation-buttons {
    display: flex;
    gap: 15px;
    align-items: center;
}

/* Download Button */
.download-controls {
    padding-right: 15px;
}

/* Desktop Navigation - Standardmäßig sichtbar */
.desktop-navigation {
    display: flex;
    gap: 15px;
    align-items: center;
}

#download-btn {
    background: #EC6726; /* 0xffEC6726 */
    color: white;
    border: none;
    border-radius: 8px; /* BorderRadius.circular(8) */
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(236, 103, 38, 0.3);
    padding: 12px 25px;
}

#download-btn:hover:not(:disabled) {
    background: #d45a20; /* Etwas dunkler für Hover */
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(236, 103, 38, 0.4);
}

#download-btn:active:not(:disabled) {
    transform: translateY(0);
}

/* Navigation Buttons */
.nav-btn {
    padding: 12px 25px;
    background: #06417D; /* 0xff06417D - Aktiv */
    color: white;
    border: none;
    border-radius: 8px; /* BorderRadius.circular(8) */
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(6, 65, 125, 0.3);
}

.nav-btn:hover:not(:disabled) {
    background: #053569; /* Etwas dunkler für Hover */
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 65, 125, 0.4);
}

.nav-btn:active:not(:disabled) {
    transform: translateY(0);
}

.nav-btn:disabled {
    background: #A0A0A0; /* 0xffA0A0A0 - Inaktiv */
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

#page-number {
    font-size: 16px;
    font-weight: bold;
    color: #ecf0f1;
    min-width: 140px;
    text-align: center;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    padding: 8px 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px; /* BorderRadius.circular(8) */
}

/* Loading und Error States */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    font-size: 18px;
    color: #2c3e50;
    background: transparent;
}

.error {
    color: #e74c3c;
    text-align: center;
    padding: 20px;
    background: rgba(231, 76, 60, 0.1);
    border-radius: 5px;
    margin: 20px;
}

/* ===== MOBILE STYLES ===== */
@media (max-width: 768px) {
    body {
        overflow: hidden;
        -webkit-overflow-scrolling: touch;
    }
    
    #flipbook-container {
        height: calc(100vh - 80px);
        padding: 10px 5px;
        display: flex;
        justify-content: center;
        align-items: center;
        overflow: hidden;
        background: transparent;
    }
    
    /* WICHTIG: Flipbook bekommt automatische Größe von Turn.js */
    #flipbook {
        background: transparent !important;
        margin: 0 auto !important;
    }
    
    /* Seiten-Styling - WICHTIG: Keine Größenbeschränkungen */
    #flipbook .page {
        background: white !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        overflow: hidden !important;
        box-shadow: 0 2px 15px rgba(0,0,0,0.3) !important;
        /* Größe wird von JavaScript gesetzt */
    }
    
    /* Canvas-Styling - WICHTIG: Keine max-width/max-height die Turn.js stören */
    #flipbook .page canvas {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
        image-rendering: pixelated;
        /* Force GPU rendering for better quality */
        transform: translateZ(0);
        backface-visibility: hidden;
    }
    
    /* Turn.js Wrapper Fix */
    .turn-page-wrapper {
        overflow: visible !important;
    }
    
    .turn-page {
        overflow: visible !important;
    }
    
    /* Controls für Mobile */
    .controls-container {
        padding: 12px 15px;
        bottom: 10px;
    }
    
    .desktop-navigation {
        display: none !important;
    }
    
    .download-controls {
        margin-right: 0;
        padding-right: 0;
        border-right: none;
    }
    
    #download-btn {
        padding: 14px 25px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    #flipbook-container {
        height: calc(100vh - 70px);
        padding: 5px;
    }
    
    .controls-container {
        padding: 10px 12px;
    }
    
    #download-btn {
        padding: 12px 20px;
        font-size: 14px;
    }
}




/* Tablet-Optimierungen */
@media (min-width: 769px) and (max-width: 1024px) {
    #flipbook-container {
        height: calc(100vh - 90px);
    }
    
    .controls-container {
        bottom: 15px;
    }
}

/* Desktop - alles bleibt wie gehabt */
@media (min-width: 769px) {
    .download-controls {
        border-right: 1px solid rgba(255,255,255,0.2);
    }
    
    .desktop-navigation {
        display: flex !important;
    }
}