:root {
    --primary-color: #4caf50;
    --secondary-color: #212121;
    --accent-color: #e91e63;
    --text-light: #ffffff;
    --text-dark: #bdbdbd;
    --background-gradient: linear-gradient(135deg, #1b1b1b, #333333);
    --card-gradient: linear-gradient(145deg, #383838, #1f1f1f);
    --input-focus: #81c784;
}

body {
    font-family: 'Roboto', sans-serif;
    background: var(--background-gradient);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text-light);
    overflow: hidden;
}

.container {
    background: var(--card-gradient);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.7);
    width: 100%;
    max-width: 480px;
    animation: fadeIn 0.8s ease-in-out;
}

.container h1 {
    margin-bottom: 30px;
    font-size: 32px;
    text-align: center;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: bold;
}

.form-group {
    margin-bottom: 25px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-dark);
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="file"] {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: var(--secondary-color);
    color: var(--text-light);
    font-size: 16px;
    transition: box-shadow 0.3s ease-in-out;
}

.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus,
.form-group input[type="file"]:focus {
    box-shadow: 0 0 12px var(--input-focus);
    outline: none;
}

.form-group button {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    transition: background-color 0.4s, transform 0.3s;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.5);
}

.form-group button:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.6);
}

.form-group button:active {
    transform: translateY(2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

.result {
    margin-top: 20px;
    padding: 16px;
    background: var(--secondary-color);
    border-radius: 8px;
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

.result.success {
    border-left: 4px solid var(--primary-color);
}

.result.error {
    border-left: 4px solid var(--accent-color);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}