* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px; /* Desktop width */
    text-align: center;
    transition: transform 0.3s ease;
}

/* Responsive adjustment for small phones */
@media (max-width: 480px) {
    .card { padding: 25px; }
    h2 { font-size: 1.5rem; }
}

h2 { color: #333; margin-bottom: 8px; }
.subtitle { color: #777; margin-bottom: 24px; font-size: 0.9rem; }

.input-group { text-align: left; margin-bottom: 15px; position: relative; }
label { display: block; font-size: 0.85rem; margin-bottom: 5px; color: #555; font-weight: 600; }

input {
    width: 100%;
    padding: 12px;
    border: 2px solid #eee;
    border-radius: 8px;
    outline: none;
    transition: 0.3s;
}

input:focus { border-color: #764ba2; }

.error-msg { color: #e74c3c; font-size: 0.75rem; margin-top: 4px; display: block; min-height: 1em; }

button {
    width: 100%;
    padding: 12px;
    background: #764ba2;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

button:hover { background: #5a378c; }

.hidden { display: none; }

.success-icon {
    font-size: 50px;
    color: #2ecc71;
    margin-bottom: 15px;
}