:root {
    --background-color: #1a1a2e;
    --form-background: #16213e;
    --primary-color: #0f3460;
    --accent-color: #e94560;
    --text-color: #f0f0f0;
    --input-background: #0f3460;
    --input-border: #233554;
}
body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}
h1 {
    text-align: center;
    color: var(--accent-color);
    margin-bottom: 40px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}
form {
    background-color: var(--form-background);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--accent-color);
}
select, input[type="file"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 25px;
    background-color: var(--input-background);
    border: 2px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-color);
    box-sizing: border-box;
    transition: all 0.3s ease;
}

select:focus, input[type="file"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

select {
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg fill="%23e94560" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

input[type="file"] {
    padding: 10px;
}

input[type="file"]::file-selector-button {
    padding: 8px 16px;
    border: none;
    background-color: var(--accent-color);
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

input[type="file"]::file-selector-button:hover {
    background-color: #d13652;
}

input[type="submit"] {
    background-color: var(--accent-color);
    color: var(--text-color);
    padding: 14px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
    transition: all 0.3s ease;
}

input[type="submit"]:hover {
    background-color: #d13652;
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(0, 0, 0, 0.2);
}

input[type="submit"]:active {
    transform: translateY(0);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.file-name {
    margin-top: -20px;
    margin-bottom: 20px;
    font-size: 0.9em;
    color: var(--accent-color);
}

@media (max-width: 600px) {
    body {
        padding: 20px 10px;
    }
    form {
        padding: 30px 20px;
    }
    h1 {
        font-size: 2em;
    }
}