:root {
    --primary-bg: #0d1b2a; --secondary-bg: #1b263b; --border-color: #415a77;
    --text-color: #e0e1dd; --highlight-color: #61a5c2; --correct-color: #70e000;
    --incorrect-color: #f25c54; --font-family: 'Roboto Mono', monospace;
    --grid-color: rgba(65, 90, 119, 0.2);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font-family); background-color: var(--primary-bg); color: var(--text-color);
    display: flex; justify-content: center; align-items: flex-start; min-height: 100vh; padding: 20px;
    background-image: linear-gradient(var(--grid-color) 1px, transparent 1px), linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
}
.game-wrapper { width: 100%; max-width: 800px; background-color: var(--secondary-bg); border: 2px solid var(--border-color); border-radius: 8px; box-shadow: 0 4px 25px rgba(0, 0, 0, 0.5); overflow: hidden; position: relative; }
header { display: flex; align-items: center; justify-content: center; background-color: #00000020; padding: 20px; text-align: center; border-bottom: 2px solid var(--border-color); position: relative; }
header h1 { color: var(--highlight-color); font-size: 1.5rem; text-transform: uppercase; letter-spacing: 2px; margin: 0; }
main { padding: 30px; }

/* VVVV NEW FLOATING ACTION BUTTON (FAB) STYLE VVVV */
#home-btn {
    position: fixed; /* Changed to fixed */
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--highlight-color);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.4);
    transition: transform 0.2s ease-in-out;
    z-index: 1000; /* Ensures it's on top of other content */
}
#home-btn:hover {
    transform: scale(1.1);
}
#home-btn svg {
    width: 28px;
    height: 28px;
}
#home-btn svg path {
    fill: var(--primary-bg);
}
/* ^^^^ END OF FAB STYLE ^^^^ */

#start-screen h2, #end-screen h2, #instructions-screen h2 { color: var(--highlight-color); margin-bottom: 15px; text-align: center; }
#start-screen p, #end-screen p, #instructions-screen p { margin-bottom: 20px; line-height: 1.7; }
#instructions-screen { text-align: center; }
#start-game-btn, #restart-btn { background-color: var(--highlight-color); color: var(--primary-bg); border: none; padding: 15px 30px; font-size: 1.1rem; font-weight: bold; cursor: pointer; border-radius: 4px; transition: background-color 0.2s; margin-top: 10px; }
#start-game-btn:hover, #restart-btn:hover { background-color: #82c0dd; }
#scenario-title { text-align: center; color: var(--highlight-color); margin-bottom: 25px; padding-bottom: 15px; font-weight: normal; font-size: 1.2rem; border-bottom: 1px solid var(--border-color); }
.module-selection { display: flex; flex-direction: column; gap: 15px; }
.module-btn { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-color); padding: 15px; font-family: var(--font-family); font-size: 1rem; cursor: pointer; text-align: left; transition: background-color 0.3s, color 0.3s; }
.module-btn:not(:disabled):hover { background-color: var(--highlight-color); color: var(--primary-bg); }
.module-btn:disabled { cursor: not-allowed; color: #6c757d; border-color: #495057; }
#game-header { display: flex; justify-content: space-between; margin-bottom: 20px; color: var(--highlight-color); font-weight: bold; flex-wrap: wrap; gap: 10px; }
#image-container { width: 100%; margin-bottom: 20px; }
#scenario-image { width: 100%; max-height: 350px; object-fit: cover; border-radius: 4px; border: 1px solid var(--border-color); display: none; background-color: var(--primary-bg); }
.dialogue-box { background: var(--primary-bg); padding: 20px; border-radius: 4px; margin-bottom: 10px; border-left: 5px solid var(--highlight-color); }
#context-dialogue-box { border-left-color: var(--border-color); background: none; opacity: 0.8; margin-bottom: 20px; }
#context-dialogue-box .character-name { color: var(--text-color); }
.character-name { font-weight: bold; color: var(--highlight-color); margin-bottom: 10px; }
.dialogue-text { line-height: 1.7; font-size: 1.1rem; }
#interaction-area { display: grid; gap: 10px; }
#writing-input { width: 100%; min-height: 120px; background: var(--primary-bg); border: 1px solid var(--border-color); color: var(--text-color); padding: 15px; font-family: var(--font-family); font-size: 1rem; border-radius: 4px; }
.option-btn { background-color: var(--secondary-bg); border: 1px solid var(--border-color); color: var(--text-color); padding: 15px; font-family: var(--font-family); font-size: 1rem; cursor: pointer; text-align: left; transition: background-color 0.2s; width: 100%; line-height: 1.5; }
.option-btn:not(:disabled):hover { border-color: var(--highlight-color); }
.option-btn.correct { background-color: var(--correct-color); color: var(--primary-bg); font-weight: bold; border-color: var(--correct-color) !important; }
.option-btn.incorrect { background-color: var(--incorrect-color); color: var(--primary-bg); font-weight: bold; opacity: 0.7; border-color: var(--incorrect-color) !important; cursor: not-allowed; }
#fill-in-blank-input, .dual-input { background: var(--primary-bg); border: 1px solid var(--border-color); color: var(--text-color); padding: 10px; font-family: var(--font-family); font-size: 1rem; border-radius: 4px; text-align: center; }
#submit-btn { background-color: var(--highlight-color); color: var(--primary-bg); border: none; padding: 15px; font-size: 1rem; font-weight: bold; cursor: pointer; border-radius: 4px; transition: background-color 0.2s; }
#submit-btn:hover { background-color: #82c0dd; }
#feedback-area { margin-top: 20px; }
#feedback-text { padding: 15px; border-radius: 4px; font-weight: bold; line-height: 1.6; text-align: center; }
#feedback-text.skipped { background-color: #415a773a; }
#feedback-text.correct { background-color: #2b93481a; }
#feedback-text.incorrect { background-color: #f25c541a; }
.explanation-es { display: block; margin-top: 10px; font-style: italic; color: #c7d1db; font-weight: normal; }
#roleplay-script-container { border: 1px dashed var(--border-color); margin-top: 20px; padding: 15px; border-radius: 5px; background-color: #0000001a; text-align: left; line-height: 1.7; max-height: 300px; overflow-y: auto; }
#roleplay-script-container h3 { font-size: 1rem; color: var(--highlight-color); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 1px; }
.navigation-buttons { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; flex-wrap: wrap; gap: 10px; }
.navigation-buttons button { flex-grow: 1; }
#next-btn, #back-btn, #skip-btn { display: block; background-color: var(--highlight-color); color: var(--primary-bg); border: none; padding: 12px 20px; font-size: 1rem; font-weight: bold; cursor: pointer; border-radius: 4px; }
#back-btn, #skip-btn { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-color); font-weight: normal; }
.hidden { display: none !important; }
#hint-container { margin-top: 20px; text-align: center; }
#hint-btn { background: none; border: 1px solid var(--border-color); color: var(--highlight-color); padding: 8px 15px; font-family: var(--font-family); cursor: pointer; border-radius: 4px; margin-bottom: 10px; transition: background-color 0.2s; }
#hint-btn:hover { background-color: var(--border-color); }
#hint-btn:disabled { opacity: 0.5; cursor: not-allowed; }
#hint-text { font-style: italic; color: #a9bcd0; line-height: 1.5; }
@media (max-width: 768px) {
    body { padding: 10px; padding-bottom: 80px; /* Add padding to bottom to avoid FAB overlap */ }
    .game-wrapper { border-radius: 0; border: none; box-shadow: none; min-height: 100vh; }
    main { padding: 20px 15px; }
    header { padding: 15px; }
    header h1 { font-size: 1.1rem; }
    #home-btn { width: 45px; height: 45px; bottom: 15px; right: 15px; }
    #home-btn svg { width: 24px; height: 24px; }
    #scenario-title { font-size: 1.1rem; }
    .dialogue-text { font-size: 1rem; }
    .option-btn, #fill-in-blank-input, .dual-input, #submit-btn { padding: 12px; font-size: 0.95rem; }
    #scenario-image { max-height: 220px; }
    .navigation-buttons { flex-direction: column; gap: 10px; }
    .navigation-buttons button { width: 100%; }
}