body {
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    background: linear-gradient(180deg, #e9eef5 0%, #f6f8fb 100%);
    margin: 0;
    color: #1f2937;
}

.login-container {
    background: #ffffff;
    padding: 28px;
    border-radius: 10px;
    box-shadow: 0 12px 36px rgba(15, 23, 42, 0.15);
    width: 100%;
    max-width: 420px;
    border: 1px solid #d7dfe9;
}

h1 {
    color: #223047;
    text-align: center;
    margin-bottom: 1.2rem;
    font-size: 1.45rem;
    font-weight: 700;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.45rem;
    color: #334155;
    font-weight: 600;
    font-size: 13px;
}

input {
    width: 100%;
    padding: 0.72rem 0.75rem;
    border: 1px solid #c6d0dd;
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box;
    color: #111827;
}

input:focus {
    outline: none;
    border-color: #6a87ad;
    box-shadow: 0 0 0 3px rgba(106, 135, 173, 0.18);
}

button {
    width: 100%;
    padding: 0.72rem;
    background-color: #336699;
    color: white;
    border: 1px solid #2d5b87;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #2b5a86;
}

#message {
    margin-top: 1rem;
}