body {
    margin: 0;
    height: 100vh;
    background: #f3f4f6;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box {
    background: #ffffff;
    padding: 28px;
    width: 320px;

    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);

    display: flex;
    flex-direction: column;
}

.login-box h2 {
    margin: 0 0 20px;
    color: #111827;
    font-weight: 500;
    text-align: center;
}

.login-box input {
    margin-bottom: 12px;
    padding: 10px 12px;

    background: #f9fafb;
    border: 1px solid #d1d5db;
    border-radius: 8px;

    color: #111827;
    font-size: 14px;

    outline: none;
    transition: border 0.2s, box-shadow 0.2s, background 0.2s;
}

.login-box input::placeholder {
    color: #9ca3af;
}

.login-box input:focus {
    background: #ffffff;
    border-color: #2563eb;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.login-box button {
    margin-top: 8px;
    padding: 10px;

    background: #2563eb;
    border: none;
    border-radius: 8px;

    color: white;
    font-size: 14px;
    font-weight: 500;

    cursor: pointer;
    transition: background 0.2s, transform 0.05s, box-shadow 0.1s;
}

.login-box button:hover {
    background: #1d4ed8;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.login-box button:active {
    transform: scale(0.98);
    box-shadow: none;
}

.error {
    margin-top: 12px;
    color: #dc2626;
    font-size: 13px;
    text-align: center;
    min-height: 16px;
}