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

body {
    /* Subtle dark night background */
    background: radial-gradient(circle at center, #0f1115, #000000);
    color: white;
    font-family: 'Libre Baskerville', 'Baskerville', serif;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.screen {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 2s ease-in-out;
}

.screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.start-content {
    text-align: center;
}

#game-title {
    font-family: 'Libre Baskerville', 'Baskerville', serif;
    font-size: 3rem;
    font-style: italic;
    color: rgba(224, 201, 163, 0.9);
    margin-bottom: 20px;
    letter-spacing: 4px;
    text-shadow: 0 0 20px rgba(224, 201, 163, 0.4);
}

#game-subtitle {
    font-family: 'Libre Baskerville', 'Baskerville', serif;
    font-size: 1.2rem;
    color: rgba(224, 201, 163, 0.7);
    margin-bottom: 40px;
    letter-spacing: 2px;
}

/* Premium Start Button with Glassmorphism */
#start-btn {
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    backdrop-filter: blur(10px);
    cursor: pointer;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    letter-spacing: 2px;
    text-transform: uppercase;
    outline: none;
}

#start-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
}

@keyframes glitch-effect {
    0% { transform: translate(0) skewX(0); filter: none; }
    20% { transform: translate(-10px, 5px) skewX(5deg); filter: drop-shadow(10px 5px 0 #68441e) contrast(150%); }
    40% { transform: translate(10px, -5px) skewX(-5deg); filter: drop-shadow(-10px -5px 0 #4a2f12) sepia(100%); }
    60% { transform: translate(-5px, 10px) skewX(2deg); filter: drop-shadow(5px -10px 0 #68441e) blur(2px) saturate(150%); }
    80% { transform: translate(5px, -10px) skewX(-2deg); filter: drop-shadow(-5px 10px 0 #4a2f12) brightness(150%); }
    100% { transform: translate(0) skewX(0); filter: none; }
}

/* Book Container */
.book-container {
    position: relative;
    display: inline-block;
    max-width: 95vw;
    max-height: 95vh;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9);
    opacity: 0; /* Fades in via JS */
    transition: opacity 3s ease-in-out;
}

.book-container.visible {
    opacity: 1;
}

.book-container.is-glitching {
    animation: glitch-effect 0.4s ease-in-out;
}

.book-base {
    display: block;
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    border-radius: 8px; /* Optional slight rounding */
}

.book-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    
    /* Softer fading mask from top to bottom */
    -webkit-mask-image: linear-gradient(to bottom, black 0%, black 33%, transparent 66%, transparent 100%);
    mask-image: linear-gradient(to bottom, black 0%, black 33%, transparent 66%, transparent 100%);
    -webkit-mask-size: 100% 300%;
    mask-size: 100% 300%;
    -webkit-mask-position: 0 100%; /* Initially hidden (bottom 1/3 is transparent) */
    mask-position: 0 100%;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    transition: -webkit-mask-position 12s ease-in-out, mask-position 12s ease-in-out; /* Slow and smooth reveal */
}

.book-overlay.reveal {
    -webkit-mask-position: 0 0; /* Fully visible (top 1/3 is black) */
    mask-position: 0 0;
}

/* Navigation Buttons */
#next-btn, #prev-btn, #solve-btn {
    position: absolute;
    bottom: 50px;
    padding: 10px 25px;
    font-family: 'Libre Baskerville', 'Baskerville', serif;
    font-size: 1.5rem;
    font-style: italic;
    color: rgba(224, 201, 163, 0.5); /* Very faded text */
    background: transparent; /* No background at all */
    border: none;
    cursor: pointer;
    box-shadow: none;
    opacity: 0;
    pointer-events: none;
    transition: all 0.8s ease-in-out;
    text-decoration: none;
    z-index: 100;
    letter-spacing: 4px;
    text-transform: lowercase;
}

#next-btn, #solve-btn { right: 50px; }
#prev-btn { left: 50px; }

#next-btn.visible, #prev-btn.visible, #solve-btn.visible {
    opacity: 1;
    pointer-events: auto;
}

#next-btn:hover, #prev-btn:hover, #solve-btn:hover {
    background: transparent;
    color: rgba(255, 255, 255, 1);
    text-shadow: 0 0 15px rgba(224, 201, 163, 0.8);
    transform: scale(1.05);
}

/* Zoom Controls */
#zoom-controls {
    position: absolute;
    top: 30px;
    right: 30px;
    z-index: 700;
    display: flex;
    flex-direction: column;
    gap: 10px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 2s ease-in-out;
}
#zoom-controls.visible {
    opacity: 1;
    pointer-events: auto;
}
#zoom-controls button {
    width: 45px;
    height: 45px;
    background: rgba(10, 5, 0, 0.6);
    border: 1px solid rgba(224, 201, 163, 0.3);
    color: rgba(224, 201, 163, 0.8);
    font-size: 1.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s;
    outline: none;
    display: flex;
    justify-content: center;
    align-items: center;
}
#zoom-controls button:hover {
    background: rgba(224, 201, 163, 0.2);
    color: white;
    border-color: rgba(224, 201, 163, 0.8);
    box-shadow: 0 0 10px rgba(168, 148, 126, 0.2);
}

/* Nav Cross */
#nav-cross {
    position: absolute;
    bottom: 30px;
    left: 30px;
    z-index: 700;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease-in-out;
}
#nav-cross.visible {
    opacity: 1;
    pointer-events: auto;
}
.nav-middle {
    display: flex;
    gap: 5px;
}
#nav-cross button {
    width: 45px;
    height: 45px;
    background: rgba(10, 5, 0, 0.6);
    border: 1px solid rgba(224, 201, 163, 0.3);
    color: rgba(224, 201, 163, 0.8);
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s;
    outline: none;
    display: flex;
    justify-content: center;
    align-items: center;
}
#nav-cross button:hover, #nav-cross button:active {
    background: rgba(224, 201, 163, 0.4);
    color: white;
    border-color: rgba(224, 201, 163, 0.8);
    box-shadow: 0 0 10px rgba(168, 148, 126, 0.2);
}

/* Magnifier */
#magnifier {
    position: absolute;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    /* Keine Umrandung, wie gewünscht */
    pointer-events: none; /* Mouse events gehen durch */
    background-repeat: no-repeat;
    z-index: 800; /* Über den Bildern */
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.8), inset 0 0 20px rgba(0, 0, 0, 0.5); /* Leichter Schatten für räumliche Tiefe */
    transform: translate(-50%, -50%); /* Zentriert auf dem Cursor */
    display: none;
}

#magnifier.visible {
    display: block;
}

/* SPA Scene Styles */
.scene {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 2s ease-in-out;
}

.scene.active {
    opacity: 1;
    pointer-events: auto;
}

#solve-modal {
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 500;
}

#global-riddle-input {
    margin: 0;
    width: 100px;
    height: 100px;
    font-size: 4rem;
    text-align: center;
    font-family: 'Libre Baskerville', serif;
    background: transparent;
    color: #e0c9a3;
    border: none;
    border-bottom: 2px solid #5a3819;
    border-radius: 0;
    outline: none;
    transition: border-color 0.3s, text-shadow 0.3s;
    text-transform: uppercase;
}

#global-riddle-input:focus {
    border-color: #a8947e;
    text-shadow: 0 0 20px rgba(168, 148, 126, 0.8);
}

/* Final Solve Container (Embedded in Epilog) */
#epilog-inputs-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    z-index: 50;
    background: rgba(0, 0, 0, 0.75);
    padding: 40px;
    border-radius: 12px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 2s ease-in-out;
}

#epilog-inputs-container.visible {
    opacity: 1;
    pointer-events: auto;
}

.final-title {
    font-family: 'Libre Baskerville', 'Baskerville', serif;
    font-size: 2.5rem;
    font-style: italic;
    color: rgba(224, 201, 163, 0.9);
    letter-spacing: 4px;
    text-shadow: 0 0 20px rgba(224, 201, 163, 0.4);
    text-align: center;
}

.final-inputs {
    display: flex;
    gap: 15px;
}

.final-input {
    margin: 0;
    width: 60px;
    height: 80px;
    font-size: 3.5rem;
    text-align: center;
    font-family: 'Libre Baskerville', serif;
    background: transparent;
    color: #e0c9a3;
    border: none;
    border-bottom: 2px solid #5a3819;
    border-radius: 0;
    outline: none;
    transition: border-color 0.3s, text-shadow 0.3s;
    text-transform: uppercase;
}

.final-input:focus {
    border-color: #a8947e;
    text-shadow: 0 0 20px rgba(168, 148, 126, 0.8);
}

/* Fail Screen Styles */
#fail-screen {
    background-color: #050000;
    z-index: 1000; /* Covers everything */
}

.fail-content {
    text-align: center;
    color: #8b0000; /* Dark red */
    font-family: 'Courier New', Courier, monospace;
}

.fail-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    letter-spacing: 5px;
    animation: pulse-red 2s infinite;
}

#penalty-timer {
    font-size: 5rem;
    font-weight: bold;
    text-shadow: 0 0 20px rgba(139, 0, 0, 0.8);
}

@keyframes pulse-red {
    0% { opacity: 0.5; text-shadow: 0 0 5px rgba(139,0,0,0.5); }
    50% { opacity: 1; text-shadow: 0 0 20px rgba(139,0,0,1); }
    100% { opacity: 0.5; text-shadow: 0 0 5px rgba(139,0,0,0.5); }
}

/* Long violent glitch */
@keyframes long-glitch {
    0% { transform: translate(0) skewX(0); filter: none; }
    10% { transform: translate(-20px, 10px) skewX(10deg) scale(1.05); filter: sepia(100%) contrast(200%) brightness(150%) blur(2px); }
    20% { transform: translate(20px, -10px) skewX(-10deg) scale(0.95); filter: drop-shadow(-20px -10px 0 #5a3819) sepia(100%); }
    30% { transform: translate(-10px, 20px) skewX(5deg); filter: drop-shadow(20px -20px 0 #3a1f0a) contrast(300%) grayscale(50%); }
    40% { transform: translate(10px, -20px) skewX(-5deg) scale(1.1); filter: contrast(300%) grayscale(100%); }
    50% { transform: translate(-25px, 5px) skewX(15deg); filter: blur(5px) saturate(300%) sepia(80%); }
    60% { transform: translate(25px, -5px) skewX(-15deg); filter: drop-shadow(0 0 30px #68441e) brightness(50%); }
    70% { transform: translate(-5px, 25px) skewX(2deg) scale(0.9); filter: contrast(200%) sepia(100%); }
    80% { transform: translate(5px, -25px) skewX(-2deg); filter: contrast(400%) blur(1px); }
    90% { transform: translate(15px, 15px) skewX(8deg) scale(1.05); filter: drop-shadow(15px 15px 0 #a8947e); }
    100% { transform: translate(0) skewX(0); filter: none; }
}

.book-container.long-glitching {
    animation: long-glitch 0.2s linear infinite;
}

/* Dev Menu */
#dev-menu {
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    gap: 5px;
    background: rgba(0, 0, 0, 0.8);
    padding: 5px 10px;
    border-radius: 5px;
}
.dev-btn {
    background: #333;
    color: #fff;
    border: 1px solid #555;
    padding: 2px 5px;
    font-size: 0.8rem;
    cursor: pointer;
    font-family: sans-serif;
    outline: none;
}
.dev-btn:hover {
    background: #555;
}

/* -------------------------------------- */
/* Mobile Optimization                    */
/* -------------------------------------- */
@media (max-width: 768px) {
    /* Title Screen */
    .title { font-size: 2.5rem; }
    .subtitle { font-size: 1rem; }
    #start-btn { padding: 12px 25px; font-size: 1rem; }

    /* Book Scaling */
    .book-base, .book-overlay {
        height: auto;
        width: 100vw;
        max-width: 100vw;
    }

    /* Navigation Buttons */
    #next-btn, #prev-btn, #solve-btn {
        bottom: 20px;
        font-size: 1rem;
        padding: 8px 15px;
    }
    #next-btn, #solve-btn { right: 20px; }
    #prev-btn { left: 20px; }

    /* Zoom Controls & Cross */
    #zoom-controls { top: 10px; right: 10px; }
    #zoom-controls button { width: 35px; height: 35px; font-size: 1.2rem; }
    #nav-cross { bottom: 80px; left: 50%; transform: translateX(-50%); }

    /* Single Riddle Input */
    #global-riddle-input {
        width: 60px;
        height: 60px;
        font-size: 2.5rem;
    }

    /* Epilogue Inputs */
    #epilog-inputs-container {
        width: 90vw;
        padding: 20px 10px;
        gap: 20px;
    }
    .final-title {
        font-size: 1.2rem;
        line-height: 1.4;
    }
    .final-inputs { gap: 5px; }
    .final-input {
        width: 35px;
        height: 50px;
        font-size: 2rem;
    }

    /* Fail Screen */
    .fail-content h2 { font-size: 1.5rem; }
    #penalty-timer { font-size: 3.5rem; }
}