:root {
    --primary-color: #2196F3;
    --background-color: #ffffff;
    --text-color: #333333;
    --border-color: #dddddd;
}

[data-theme="dark"] {
    --background-color: #1a1a1a;
    --text-color: #ffffff;
    --border-color: #444444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.ad-section {
    height: 100px;
    margin: 20px 0;
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.text-input textarea {
    width: 100%;
    height: 200px;
    padding: 15px;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    resize: vertical;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 16px;
    margin: 20px 0;
}

.counters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.counter-box {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.counter-box span {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary-color);
}

.analysis {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 30px 0;
}

.social-limits .limit {
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}

.keyword-density {
    background-color: var(--background-color);
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.time-calculations {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.theme-toggle {
    text-align: right;
    margin: 10px 0;
}

button {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .counters, .analysis, .time-calculations {
        grid-template-columns: 1fr;
    }
    
    .text-input textarea {
        height: 150px;
    }
}