body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start; /* Changed from center to lift content */
    padding-top: 50px; /* Add some top spacing */
    min-height: 100vh;
    margin: 0;
    font-family: sans-serif;
    background-color: #f0f0f0;
}

#notice-bar {
    width: 100%;
    max-width: 600px;
    background-color: #fff3cd;
    color: #856404;
    padding: 10px 15px;
    margin-top: 20px;
    margin-bottom: 10px;
    border: 1px solid #ffeeba;
    border-radius: 8px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    font-size: 0.9rem;
}

.notice-icon {
    display: flex;
    align-items: center;
    margin-right: 10px;
}

.notice-text {
    font-weight: bold;
}

h1 {
    text-align: center;
    margin-top: 0;
}

.controls {
    margin-bottom: 10px;
}

#difficulty-selector {
    padding: 5px;
    font-size: 1rem;
}

.image-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.primary-btn {
    background-color: #6f42c1;
    color: white;
    border: 2px solid transparent;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.primary-btn:hover {
    box-shadow: 0 0 15px rgba(111, 66, 193, 0.8), 0 0 5px rgba(111, 66, 193, 0.5);
    border-color: #a885e6;
}

.secondary-btn {
    background-color: #6c757d;
    color: white;
    border: 2px solid transparent;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.secondary-btn:hover {
    box-shadow: 0 0 15px rgba(108, 117, 125, 0.8), 0 0 5px rgba(108, 117, 125, 0.5);
    border-color: #adb5bd;
}

#start-button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1.1rem;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#start-button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#timer {
    font-size: 1.2rem;
    font-weight: bold;
    margin: 10px 0;
    color: #333;
}

#sidebar-wrapper {
    position: fixed;
    left: 20px;
    top: 45%; /* Slightly higher than 50% */
    transform: translateY(-50%);
    width: 250px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#leaderboard {
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

#rank-guide {
    background-color: #fff3cd;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border-left: 4px solid #ffc107;
    font-size: 0.8rem;
}

#rank-guide h4 {
    margin: 0 0 8px 0;
    color: #856404;
    text-align: center;
}

#rank-guide ul {
    margin: 0;
    padding: 0 0 0 15px;
    list-style-type: none;
}

#rank-guide li {
    margin-bottom: 4px;
    color: #666;
}

#rank-guide .expiration {
    margin-top: 8px;
    font-size: 0.75rem;
    color: #999;
    font-style: italic;
}

#leaderboard h3 {
    margin-top: 0;
    text-align: center;
    border-bottom: 1px solid #ccc;
    padding-bottom: 10px;
}

#leaderboard-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#leaderboard-list li {
    background-color: #f9f9f9;
    margin-bottom: 8px;
    padding: 8px;
    border-radius: 4px;
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
}

.record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.crown {
    font-size: 1.2rem;
    margin-right: 5px;
}

.crown.gold { color: #FFD700; }    /* Gold */
.crown.silver { color: #C0C0C0; }  /* Silver */
.crown.bronze { color: #CD7F32; }  /* Bronze */

.rank-num {
    font-weight: bold;
    margin-right: 5px;
    width: 1.2rem;
    text-align: center;
    color: #666;
}

.record-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.record-time {
    font-weight: bold;
    color: #007bff;
}

.record-comment {
    font-size: 0.8rem;
    color: #555;
    flex-grow: 1;
    text-align: right;
    margin-left: 10px;
}

.record-difficulty {
    font-size: 0.75rem;
    color: #999;
}

.record-nickname {
    font-size: 0.85rem;
    font-weight: bold;
    color: #333;
    margin-right: 5px;
}

.badge-today {
    background-color: #ffc107;
    color: #333;
    font-size: 0.7rem;
    padding: 2px 4px;
    border-radius: 4px;
    margin-left: 5px;
    font-weight: bold;
}

.leaderboard-share-btn {
    display: block;
    width: 100%;
    margin-top: 0; /* Gap handled by wrapper */
    padding: 10px 0;
    background-color: #17a2b8;
    color: white;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    font-size: 0.9rem;
    font-weight: bold;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.leaderboard-share-btn:hover {
    box-shadow: 0 0 15px rgba(23, 162, 184, 0.8), 0 0 5px rgba(23, 162, 184, 0.5);
    border-color: #5bc0de;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        display: flex;
        flex-direction: column;
    }

    #sidebar-wrapper {
        position: static;
        transform: none;
        width: 100%;
        max-width: 400px;
        margin: 20px 0;
        order: 10; /* Ensure it comes after game area if flex container used, or just flow */
    }

    #original-image-container {
        top: 10px;
        right: 10px;
        width: 100px;
    }

    #puzzle-container {
        width: 300px !important; /* Force resize for mobile */
        height: 300px !important;
    }
    
    .puzzle-piece {
        background-size: 300px 300px !important;
    }
}

#puzzle-container {
    position: relative;
    width: 400px;
    height: 400px;
    border: 2px solid black;
    margin: 20px 0;
}

.puzzle-piece {
    position: absolute;
    border: 1px solid #ccc;
    box-sizing: border-box;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

.puzzle-piece.selected {
    z-index: 20;
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.8);
    border: 2px solid #FFD700;
    transform: scale(1.05);
}

.puzzle-piece.dragging {
    z-index: 10;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    transform: scale(1.1);
}

#toggle-ref-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001; /* Higher than container */
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid #ccc;
    border-radius: 20px;
    padding: 5px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#original-image-container {
    position: fixed;
    top: 60px; /* Below the toggle button */
    right: 20px;
    max-width: 200px; /* Increased max-width */
    width: auto;      /* Auto width to fit image ratio */
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.3s;
}

@media (max-width: 768px) {
    #toggle-ref-btn {
        top: 10px;
        right: 10px;
    }
    
    #original-image-container {
        top: 50px;
        right: 10px;
        max-width: 120px; /* Smaller max-width for mobile */
        width: auto;
    }
/* ... rest of media query */

#original-image {
    max-width: 100%; /* Ensure image scales down */
    max-height: 200px; /* Prevent it from being too tall */
    height: auto;
    border: 1px solid #333;
    display: block;
    object-fit: contain; /* Ensure full image is visible */
}

/* Modal Styles */
.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 300px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.modal-content textarea {
    width: 100%;
    box-sizing: border-box;
    resize: vertical;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.modal-content input[type="text"] {
    /* Styles handled by inline styles in HTML for flex item */
    box-sizing: border-box;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.modal-content button {
    padding: 8px 16px;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
}

.modal-content button:hover {
    background-color: #45a049;
}