body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: #151515;
    color: #f0f0f0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    max-width: 600px;
    width: 90%;
    padding: 30px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

input[type="file"] {
    padding: 12px;
    border: 2px dashed #ccc;
    border-radius: 8px;
    background: #fafafa;
    transition: border-color 0.3s ease;
    color: black;
}

input[type="file"]:hover {
    border-color: #28a745;
}

.wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    width: 100%;
}

button {
    padding: 12px 20px;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

.message {
    margin-top: 20px;
    text-align: center;
    color: #333;
    font-weight: 500;
}