:root {
    --primary-color: #3498db; 
    --secondary-color: #2ecc71; 
    --accent-color: #9b59b6; 
    --danger-color: #e74c3c; 
    --warning-color: #f39c12; 
    --light-bg: #f8f9fa;
    --dark-bg: #2c3e50;
    --light-text: #333;
    --dark-text: #ecf0f1;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --border-radius: 6px;
    --spacing-unit: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--light-text);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 600px;
    margin: calc(var(--spacing-unit) * 3) auto;
    padding: calc(var(--spacing-unit) * 2);
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
}

h1 {
    text-align: center;
    color: var(--dark-bg);
    margin-bottom: calc(var(--spacing-unit) * 3);
    font-size: 2em;
    font-weight: 600;
}

h2 {
    font-size: 1.2em;
    color: var(--dark-bg);
    margin-bottom: var(--spacing-unit);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-unit);
}

h3 {
    font-size: 1.1em;
    color: var(--dark-bg);
    margin-top: 0;
    margin-bottom: var(--spacing-unit);
}

p {
    margin-bottom: var(--spacing-unit);
    color: #555;
}


.upload-section,
.image-preview-container,
.results-container {
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding: calc(var(--spacing-unit) * 2);
    background: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 6px var(--shadow-color);
}


.selection-options {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding: calc(var(--spacing-unit) * 2);
    background: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 6px var(--shadow-color);
}

.option-column {
    flex: 1;
    min-width: 150px;
}

.dropdown {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: #fff;
    font-size: 1em;
    color: var(--light-text);
    cursor: pointer;
    appearance: none; 
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007CB2%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right calc(var(--spacing-unit) * 1.5) center;
    background-size: .65em auto;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.dropdown:hover { border-color: #aaa; }
.dropdown:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.upload-section {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}

.upload-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 2);
    justify-content: center;
}


button,
.file-input-label {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    transition: background-color 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-unit);
    text-align: center;
}

button:hover:not(:disabled),
.file-input-label:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

button:active:not(:disabled),
.file-input-label:active {
    transform: translateY(0);
    box-shadow: none;
}

.file-input-label {
    background-color: var(--primary-color);
    color: white;
}
.file-input-label:hover { background-color: #2980b9; }
#imageInput { display: none; }

.camera-button {
    background-color: var(--accent-color);
    color: white;
}
.camera-button:hover { background-color: #8e44ad; }
.camera-button svg { width: 1.2em; height: 1.2em; }

#searchButton {
    background-color: var(--secondary-color);
    color: white;
    width: 100%;
    margin-top: calc(var(--spacing-unit) * 1);
}
#searchButton:hover:not(:disabled) { background-color: #27ae60; }
#searchButton:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.7;
}

.action-button {
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
    font-size: 0.9em;
}

#editPictureButton {
    background-color: var(--warning-color);
    color: white;
}
#editPictureButton:hover { background-color: #e67e22; }

#goToResultsButton {
    background-color: var(--primary-color);
    color: white;
}
#goToResultsButton:hover { background-color: #2980b9; }

.preview-actions {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-unit);
    margin-top: calc(var(--spacing-unit) * 2);
}
.preview-actions #searchButton { 
     width: auto;
     flex-grow: 1;
}
#backButton {
    background-color: #7f8c8d;
    color: white;
}
#backButton:hover { background-color: #95a5a6; }


.image-preview-container p {
    font-size: 0.9em;
    color: #666;
}

.canvas-container {
    position: relative; 
    width: 100%;
    max-width: 100%; 
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden; 
    margin-top: var(--spacing-unit);
    background-color: #eee; 

    
    min-height: 200px; 
    max-height: 70vh; 
    display: flex; 
    justify-content: center;
    align-items: center;
}

#imageCanvas {
    display: block;
    max-width: 100%; 
    max-height: 70vh; 
    object-fit: contain; 
    cursor: crosshair;
    margin: 0 auto; 

    
    image-rendering: auto; 

    
    object-position: center;
}


@media (min-width: 768px) {
    .canvas-container {
        overflow-y: auto; 
        max-height: 80vh; 
    }
}


@media (max-width: 480px) {
    .canvas-container {
        max-height: 60vh; 
    }
    
    #imageCanvas {
        max-height: 60vh; 
    }
}


.results-container { display: none; } 

.search-query-display {
    padding: calc(var(--spacing-unit) * 2);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 2);
    word-wrap: break-word;
}

.search-query-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-unit);
    flex-wrap: wrap; 
}
.search-query-display p { margin: 0; font-size: 1em; flex-grow: 1; } 
#searchQueryText { font-weight: 600; color: var(--dark-bg); }

#goToResultsButton svg {
    margin-left: calc(var(--spacing-unit) / 2);
    vertical-align: middle;
}

.results-buttons { 
    display: flex;
    gap: var(--spacing-unit);
    flex-shrink: 0; 
}


.summary-display {
    padding: calc(var(--spacing-unit) * 2);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-top: calc(var(--spacing-unit) * 2); 
    margin-bottom: calc(var(--spacing-unit) * 2); 
    word-wrap: break-word;
}
.summary-display p:first-child { 
    margin-bottom: calc(var(--spacing-unit) / 2);
    font-weight: 600;
    color: var(--dark-bg);
}
#summaryText { 
    margin: 0;
    font-size: 1em;
    color: #555; 
}



.error {
    color: var(--danger-color);
    background-color: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--danger-color);
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
    margin-top: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius);
    text-align: center;
    display: none; 
}


.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7); 
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    opacity: 0; 
    transition: opacity 0.3s ease-in-out;
    pointer-events: none; 
    border-radius: var(--border-radius); 
}

.loading-overlay.visible {
    opacity: 1;
    pointer-events: auto; 
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: var(--primary-color);
    animation: spin 1s ease infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}



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

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

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

.fade-out {
    animation: fadeOut 0.5s ease-out forwards;
}



.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px); 
}

.modal-content {
    position: relative;
    background-color: #fff;
    margin: 5% auto;
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 700px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#cameraFeed {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin-bottom: 0;
    background-color: #000;

    width: 100%;
    height: 100%;
    object-fit: cover;
}

.close-modal-button {
    position: absolute;
    top: calc(var(--spacing-unit) * 1.5);
    right: calc(var(--spacing-unit) * 1.5);
    background: white;
    color: black;
    border: 1px solid black;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    font-size: 20px;
    line-height: 28px;
    text-align: center;
    padding: 0;
    cursor: pointer;
    z-index: 1010;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.2s, color 0.2s;
}
.close-modal-button:hover {
    background-color: #eee;
    /* Removed transform effect */
}
.close-modal-button:active {
    /* Removed transform effect */
}


.capture-modal-button {
    position: absolute;
    bottom: calc(var(--spacing-unit) * 3);
    /* Remove transform-based centering */
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto;
    /* Fixed width */
    width: 60px;
    height: 60px;
    background-color: white;
    border: 2px solid black;
    border-radius: 50%;
    padding: 0;
    cursor: pointer;
    z-index: 1010;
    box-shadow: 0 3px 8px rgba(0,0,0,0.3);
    /* Only keep background-color transition */
    transition: background-color 0.2s;
}

.capture-modal-button:hover {
    background-color: #f0f0f0; 

}
.capture-modal-button:active {
    background-color: #e0e0e0;

}


@media (max-width: 768px) { 
    .modal {
        background-color: #000; 
        backdrop-filter: none; 
    }
    .modal-content {
        width: 100%;
        height: 100%;
        margin: 0;
        padding: 0;
        border-radius: 0; 
        box-shadow: none; 
        background-color: #000; 
    }

    #cameraFeed {
        border-radius: 0;
    }

    .close-modal-button {
        top: calc(var(--spacing-unit) * 2);
        right: calc(var(--spacing-unit) * 2);
        width: 35px;
        height: 35px;
        font-size: 22px;
        line-height: 33px;
    }

    .capture-modal-button {
        bottom: calc(var(--spacing-unit) * 4); 
        width: 70px;
        height: 70px;
    }
}

@media (max-width: 640px) {
    .container {
        margin: var(--spacing-unit) auto;
        padding: var(--spacing-unit);
        border-radius: 0; 
        box-shadow: none;
    }

    h1 { font-size: 1.6em; margin-bottom: calc(var(--spacing-unit) * 2); }
    h2 { font-size: 1.1em; }

    .selection-options { flex-direction: column; }
    .upload-buttons { flex-direction: column; }

    button, .file-input-label { 
        width: 100%; 
        box-sizing: border-box; 
    } 

    .modal-content { width: 95%; margin: 5% auto; padding: calc(var(--spacing-unit) * 2); }
}