:root {
    --pomodoro-color: #FF4500;       
    --secondary-color: #555;         
    --container-bg: #fff;            
    --panel-shadow: #ccc;            
    --text-color: #333;              
    --hover-color: #007BFF;          
}

.site-header {
    width: 100%;              
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;      
    background-color: var(--container-bg);
    box-shadow: 0 2px 20px var(--panel-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.4s, box-shadow 0.4s;
    border-bottom: 2px solid var(--panel-shadow);
    box-sizing: border-box;
}

.header-left .site-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
}

.header-right {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: auto;         
}

.header-right a.btn {
    display: inline-block;
    padding: 8px 16px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--pomodoro-color);
    background-color: #fff;
    border: 2px solid var(--pomodoro-color);
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    margin-right: 10px;      
}

.header-right a.btn:hover {
    background-color: var(--hover-color);
    color: #fff;
    border-color: var(--hover-color);
}



.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    text-align: left;
    line-height: 1.6;
    font-family: Arial, sans-serif;
    color: #333;
}

.container h1,
.container h2 {
    margin-top: 30px;
    margin-bottom: 15px;
}

.container p {
    margin-bottom: 15px;
}

.container ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

.container a {
    color: #0066cc;
    text-decoration: underline;
}


.footer-links {
    text-align: center;
    margin: 20px 0;
}

.footer-links ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links ul li a {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: color 0.3s;
}

.footer-links ul li a:hover {
    color: var(--hover-color);
}


footer {
    text-align: center;
    padding: 15px 0;
    font-size: 0.9rem;
    color: var(--text-color);
    background-color: var(--container-bg);
    border-top: 1px solid var(--panel-shadow);
}