body {
    font-family: system-ui, -apple-system, sans-serif;
    background: #f5f5f5;
    padding: 10px;
    margin: 0;
}

.container {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    max-width: 500px;
    margin: 1rem auto;
    box-sizing: border-box;
}

h1, h2 {
    color: #333;
    margin: 0 0 1rem 0;
}

h1 {
    font-size: 1.5rem;
}

h2 {
    font-size: 1.1rem;
}

input[type="file"] {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    background: #f0f0f0;
    box-sizing: border-box;
}

.loading {
    text-align: center;
    padding: 15px;
    color: #007bff;
    font-weight: 600;
    font-size: 14px;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.results-container {
    margin-top: 1.5rem;
}

.words-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.words-list > div {
    background: #007bff;
    color: white;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    font-size: 15px;
}

.empty-state {
    text-align: center;
    color: #666;
    padding: 20px;
}