body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f4f7f6;
    margin: 0;
}

.container {
    background: #fff;
    padding: 2rem 3rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    text-align: center;
    width: 100%;
    max-width: 700px;
}

h1 {
    color: #333;
    margin-bottom: 0.5rem;
}

p {
    color: #666;
    margin-bottom: 2rem;
}

.drop-zones {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.drop-zone {
    flex: 1;
    height: 150px;
    padding: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-family: inherit;
    font-size: 16px;
    cursor: pointer;
    color: #888;
    border: 2px dashed #007bff;
    border-radius: 10px;
    background-color: #f9f9f9;
    transition: background-color 0.2s, border-color 0.2s;
    position: relative;
    overflow: hidden;
}

.drop-zone-over {
    border-color: #0056b3;
    background-color: #e9ecef;
}

.drop-zone-input {
    display: none;
}

.drop-zone-thumb {
    width: 100%;
    height: 100%;
    border-radius: 10px;
    overflow: hidden;
    background-color: #eee;
    background-size: cover;
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drop-zone-thumb::after {
    content: attr(data-label);
    padding: 0.5rem;
    color: #333;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
    max-width: 90%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
}

button:hover {
    background-color: #0056b3;
}

.flash-error {
    background-color: #f8d7da;
    color: #721c24;
    padding: 1rem;
    border: 1px solid #f5c6cb;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.status-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin-bottom: 2rem;
}

.loader {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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