body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f4f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 350px;
    text-align: center;
}

.hidden {
    display: none;
}

h2 { margin-top: 0; color: #333; }
.subtitle { color: #666; font-size: 0.9rem; margin-bottom: 1.5rem; }

.input-group { text-align: left; margin-bottom: 1rem; }
label { display: block; font-size: 0.8rem; margin-bottom: 0.3rem; color: #555; }
input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* Ensures padding doesn't break width */
}

button {
    width: 100%;
    padding: 10px;
    background-color: #3ecf8e; /* Supabase Green */
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
}

button:hover { background-color: #34b27b; }

#error-msg { color: red; font-size: 0.8rem; margin-top: 10px; min-height: 1.2em;}
.switch-mode { font-size: 0.8rem; margin-top: 1rem; }
.switch-mode a { color: #3ecf8e; text-decoration: none; }