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

html, body, #app {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.screen {
    display: none;
    width: 100%;
    height: 100%;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: #f5f5f5;
}

.screen.active {
    display: flex;
}

h1 {
    margin-bottom: 40px;
    color: #333;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
    max-width: 300px;
}

button {
    padding: 15px 20px;
    border: none;
    border-radius: 8px;
    background-color: #4285f4;
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #3367d6;
}

button:active {
    background-color: #2a56c5;
}

.image-container {
    position: relative;
    width: 100%;
    height: 80%;
    margin-bottom: 20px;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#preview-image, #selection-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: #eee;
}

#selection-box {
    position: absolute;
    border: 2px solid #4285f4;
    pointer-events: none;
}

.popup {
    position: absolute;
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 100;
}

.popup p {
    margin-bottom: 10px;
}

.hidden {
    display: none;
}

.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: #4285f4;
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.results-container {
    width: 100%;
    height: 100%;
    position: relative;
}

#results-iframe {
    width: 100%;
    height: calc(100% - 60px);
    border: none;
    border-radius: 8px;
}

#close-results-btn {
    margin-top: 10px;
    width: 100%;
}