body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #1c1c1e;
    color: #f2f2f7;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
    box-sizing: border-box;
}

.container {
    background-color: #2c2c2e;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    width: 100%;
    max-width: 500px;
    border: 1px solid #3a3a3c;
}

h1 { text-align: center; margin-top: 0; }
.subtitle { text-align: center; margin-top: -15px; color: #8e8e93; }

textarea, input {
    width: 100%;
    padding: 12px;
    margin-bottom: 1rem;
    border-radius: 8px;
    border: 1px solid #3a3a3c;
    background-color: #3a3a3c;
    color: #f2f2f7;
    font-size: 1rem;
    box-sizing: border-box;
}

.buttons {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0;
}

button {
    flex-grow: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background-color: #0a84ff;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

button:hover { background-color: #339aff; }

.result-box {
    background-color: #1c1c1e;
    padding: 1rem;
    border-radius: 8px;
    min-height: 60px;
    word-wrap: break-word;
    border: 1px solid #3a3a3c;
}