body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 40px;
    background-color: #eef2f5;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 400px;
    background: #ffffff;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid #e0e6ed;
    margin-top: 5vh;
}

h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e0;
    border-radius: 8px;
    box-sizing: border-box;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus {
    border-color: #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
    outline: none;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background-color: #4a90e2;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    letter-spacing: 0.5px;
    transition: background-color 0.3s, transform 0.2s;
    margin-top: 10px;
}

.btn-submit:hover {
    background-color: #357bd9;
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

@media (max-width: 600px) {
    body {
        padding: 20px;
        align-items: flex-start;
    }

    .container {
        padding: 25px 20px;
        margin-top: 5vh;
    }
}