/* --- Google Font Import --- */
@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,700;1,400&family=Cinzel+Decorative:wght@400;700&display=swap');

/* --- Root Color & Style Variables (NEW PALETTE) --- */
:root {
    --bg-color: #d0edf5;
    --book-cover-color: #a3b8c3;
    --accent-color: #e7b2c4;
    --page-color: #f3eade;
    --text-color: #3d352a;
    --ink-color: #6d5b61;
    --choice-bg: rgba(61, 53, 42, 0.05);
    --choice-hover-bg: rgba(61, 53, 42, 0.15);
}

/* --- Base Body & Global Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    width: 100vw;
    height: 100vh;
    overflow: hidden; /* Prevents scrolling on the body */
    font-family: 'Lora', serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Pre-Game Book Cover Styling --- */
#pre-game-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1500px;
    transition: opacity 0.8s ease-in-out;
    padding: 20px;
}

#book-flipper {
    width: 400px;
    height: 600px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.9s cubic-bezier(0.65, 0, 0.35, 1);
    cursor: pointer;
    max-width: 100%;
}

#book-flipper.is-flipped {
    transform: rotateY(180deg);
}

#book-front, #book-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 30px;
    background: var(--book-cover-color) linear-gradient(145deg, rgba(255,255,255,0.1), rgba(0,0,0,0.1));
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

#book-cover-image {
    width: 80%;
    margin-bottom: 20px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 4px;
    opacity: 0.8;
}

#book-front h1 {
    font-family: 'Cinzel Decorative', cursive;
    font-size: 2.8em;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
    margin: 0;
    line-height: 1.2;
}

#book-front .subtitle {
    margin: 15px 0;
    font-style: italic;
    opacity: 0.9;
}

#book-front .flip-instruction {
    position: absolute;
    bottom: 20px;
    font-size: 0.9em;
    opacity: 0.7;
}

#book-back {
    transform: rotateY(180deg);
    justify-content: space-around;
}

#book-back h2 {
    font-family: 'Cinzel Decorative', cursive;
    color: #ffffff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 10px;
    margin: 0;
}

#book-back .synopsis, #book-back .warning-text, #book-back .mission-text {
    font-size: 1em;
    line-height: 1.7;
    padding: 0 15px;
}

.warning-text { opacity: 0.8; }

#start-game-btn {
    padding: 12px 25px;
    background-color: var(--accent-color);
    border: none;
    color: var(--text-color);
    font-family: 'Cinzel Decorative', cursive;
    font-size: 1.1em;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

#start-game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--accent-color);
}

/* --- Main Game Container Styling --- */
#game-container {
    width: 100%;
    height: 100%;
    padding: 20px;
    display: none;
    opacity: 0;
    transition: opacity 1.2s ease-in;
    display: flex;
}

#left-page, #right-page {
    background-color: var(--page-color);
    flex: 1;
    box-shadow: inset 5px 0 15px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
    border-left: 1px solid #d1c4b3;
    height: 100%;
}

#scene-visual {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: opacity 1.5s ease-in-out;
}

#character-sprite {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    height: 95%;
    max-height: 900px; /* Max size for large screens */
    width: auto;
    opacity: 0;
    transition: opacity 1s ease-in-out, transform 1s ease-in-out;
    filter: drop-shadow(3px 3px 5px rgba(0,0,0,0.3));
}

#character-sprite.visible {
    opacity: 1;
}

#narrative-panel {
    padding: 50px 60px;
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto; /* Allow scrolling on narrative panel if content overflows */
}

#chapter-title {
    font-family: 'Cinzel Decorative', cursive;
    color: var(--accent-color);
    text-align: center;
    font-size: 2em;
    margin-bottom: 30px;
    min-height: 1.2em;
}

#speaker-name {
    font-family: 'Cinzel Decorative', cursive;
    font-size: 1.4em;
    color: var(--ink-color);
    margin-bottom: 10px;
    height: 30px;
}

#dialogue-text {
    font-size: 1.2em;
    line-height: 1.7;
    flex-grow: 1;
    min-height: 150px;
    cursor: pointer;
}

#dialogue-text::selection {
    color: var(--text-color);;
    background-color: var(--page-color)
}

#choices-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
    padding-bottom: 60px; /* Space for next indicator */
}

.choice-btn {
    width: 100%;
    padding: 15px;
    background-color: var(--choice-bg);
    border: 1px solid #d1c4b3;
    border-left: 3px solid var(--accent-color);
    text-align: left;
    font-family: 'Lora', serif;
    font-size: 1.1em;
    font-style: italic;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color .3s, transform .2s;
    opacity: 0;
    animation: fadeIn .5s forwards;
}

.choice-btn:hover {
    background-color: var(--choice-hover-bg);
    transform: translateX(5px);
}

#next-indicator {
    position: absolute;
    bottom: 30px;
    right: 40px;
    font-size: 2em;
    color: var(--accent-color);
    cursor: pointer;
    animation: pulse 1.5s infinite;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.3; }
    100% { opacity: 1; }
}

.hidden {
    display: none !important;
}

/* --- Universal Navigation Menu --- */
#navigation-menu {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 1000;
    pointer-events: none;
}

#nav-toggle-btn {
    width: 60px;
    height: 60px;
    background-color: var(--page-color);
    border: 2px solid #d1c4b3;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
    color: var(--accent-color);
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55), box-shadow 0.3s ease;
    position: relative;
    z-index: 1001;
    pointer-events: auto;
}

#nav-toggle-btn:hover {
    box-shadow: 0 6px 20px var(--accent-color);
}

#navigation-menu.is-open #nav-toggle-btn {
    transform: rotate(135deg);
    background-color: var(--accent-color);
    color: white;
}

.nav-link {
    position: absolute;
    bottom: 5px;
    left: 5px;
    width: 50px;
    height: 50px;
    background: var(--page-color);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    border: 1px solid #d1c4b3;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    opacity: 0;
    transform: scale(0.5) translate(0, 0);
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55), opacity 0.3s ease;
}

#navigation-menu.is-open .nav-link {
    opacity: 1;
    pointer-events: auto;
}

#navigation-menu.is-open #nav-story { transform: translate(120px, 0); transition-delay: 0.0s; }
#navigation-menu.is-open #nav-library { transform: translate(85px, -85px); transition-delay: 0.1s; }
#navigation-menu.is-open #nav-study { transform: translate(0, -120px); transition-delay: 0.2s; }

.nav-link .nav-text {
    position: absolute;
    left: 120%;
    background: var(--page-color);
    padding: 5px 12px;
    border-radius: 5px;
    color: var(--text-color);
    font-family: 'Cinzel Decorative', cursive;
    font-size: 0.9em;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.nav-link:hover .nav-text {
    opacity: 1;
    transition-delay: 0.3s;
}

.nav-link .nav-icon {
    font-size: 1.5em;
    color: var(--text-color);
}

.nav-link.active .nav-icon {
    color: var(--accent-color);
}

.nav-link.disabled {
    opacity: 0.4 !important;
    cursor: not-allowed;
    background-color: #e0e0e0;
}

.nav-link.disabled:hover .nav-text {
    opacity: 0 !important;
}

.nav-link.disabled:hover::after {
    content: attr(title);
    position: absolute;
    left: 120%;
    background-color: #3d352a;
    color: #f3eade;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.8em;
    font-family: 'Lora', serif;
    white-space: nowrap;
    z-index: 1001;
}

/* --- Responsive Design Media Queries --- */

/* Tablet (Portrait and Landscape) */
@media (max-width: 1024px) {
    #narrative-panel {
        padding: 40px;
    }

    #character-sprite {
        height: 85%;
    }

    #book-flipper {
        width: 350px;
        height: 525px;
    }

    #book-front h1 {
        font-size: 2.4em;
    }
}

/* Mobile Devices */
@media (max-width: 767px) {
    #game-container {
        flex-direction: column;
        padding: 0;
        overflow-y: auto; /* Allow scrolling for the whole container on mobile */
    }

    #left-page {
        flex: 0 0 40vh; /* Fixed height for the visual part */
        border-left: none;
        box-shadow: inset 0 -5px 15px rgba(0,0,0,0.2);
    }
    
    #right-page {
        flex: 1 1 auto; /* Takes remaining space */
        min-height: 60vh;
        box-shadow: none;
        border-left: none;
    }

    #character-sprite {
        height: 100%; /* Fill the 40vh container */
    }

    #narrative-panel {
        padding: 30px 25px;
        min-height: auto;
    }
    
    #dialogue-text {
        font-size: 1.1em;
        min-height: 120px;
        user-select: none;
    }

    #next-indicator {
        bottom: 15px;
        right: 20px;
    }
    
    #choices-container {
        padding-bottom: 40px;
    }

    /* Book Cover on Mobile */
    #book-flipper {
        width: 90vw;
        height: 75vh;
        max-height: 500px;
    }
    #book-front h1 { font-size: 2em; }
    #book-back .synopsis, #book-back .warning-text, #book-back .mission-text { font-size: 0.9em; }

    /* Navigation Menu on Mobile */
    #navigation-menu {
        bottom: 15px;
        left: 15px;
    }
    #nav-toggle-btn { width: 50px; height: 50px; font-size: 1.8em; }
    .nav-link { width: 45px; height: 45px; }
    
    #navigation-menu.is-open #nav-story { transform: translate(90px, 0); }
    #navigation-menu.is-open #nav-library { transform: translate(65px, -65px); }
    #navigation-menu.is-open #nav-study { transform: translate(0, -90px); }
}