:root {
    --bg-color: #f5f5f7;
    --card-color: #ffffff;
    --text-color: #0000FF;
    --primary-color: #4a90e2;
    --border-color: #e0e0e0;
}

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

.container {
    width: 90%;
    max-width: 800px;
    text-align: center;
}

/* 登录表单 */
#login-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 280px;
    margin: 15px auto;
}

#password-input {
    padding: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--card-color);
    color: var(--text-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

button {
    padding: 8px 12px;
    border: none;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #3a7bc8;
}

.error {
    color: #e74c3c;
    height: 18px;
    font-size: 0.85rem;
}

/* 导航网格 - 卡片改小 */
#links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.link-card {
    background-color: var(--card-color);
    padding: 15px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.link-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.link-card h3 {
    margin: 8px 0 0 0;
    font-size: 0.95rem;
}

.hidden {
    display: none;
}