:root {
    --bg-color: #f0f2f5;
    --card-bg: rgba(255, 255, 255, 0.7);
    --text-color: #333;
    --accent: #6c63ff;
}

[data-theme='dark'] {
    --bg-color: #1a1a2e;
    --card-bg: rgba(255, 255, 255, 0.1);
    --text-color: #f0f2f5;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    width: 90%;
    max-width: 400px;
}

button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
}

input {
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #ccc;
}