* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-box {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 340px;
    text-align: center;
}
.login-box h1 { color: #1a3a2a; font-size: 1.5em; margin-bottom: 8px; }
.login-box p { color: #666; font-size: 0.9em; margin-bottom: 24px; }
input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1em;
    margin-bottom: 12px;
}
button {
    width: 100%;
    padding: 12px;
    background: #2d6a4f;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
}
button:hover { opacity: 0.9; }
.error { color: #c0392b; font-size: 0.85em; margin-bottom: 12px; }