/* style.css */
:root {
    --primary-color: #1a73e8;
    --hover-color: #1557b0;
    font-family: MiSans, HarmonyOS Sans SC, system-ui;
}

body {
    background: #f8f9fa;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    user-select: none;
    -webkit-user-select: none;
}

.card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 2.5rem;
    max-width: 800px;
    width: 100%;
    text-align: center;
}

.settings {
    margin: 1.5rem 0;
}

button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

button:hover {
    background: var(--hover-color);
}

.result-box {
    margin: 1.5rem 0;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    word-break: break-all;
}

.copy-notice {
    color: #28a745;
    margin-top: 0.5rem;
    display: none;
}

.usage-counter {
    margin: 15px 0;
    color: #666;
    font-size: 0.9em;
}