* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --bg-color: #f5f7fa;
    --text-color: #333;
    --container-bg: white;
    --container-shadow: rgba(0, 0, 0, 0.1);
    --stat-box-bg: #f5f7fa;
    --stat-box-shadow: rgba(0, 0, 0, 0.05);
    --stat-box-border: #e5e8ec;
    --heading-color: #2c3e50;
    --border-color: #ddd;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --info-item-bg: #fafbfd;
    --info-item-border: #edf0f3;
    --empty-message: #7f8c8d;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #e6e6e6;
    --container-bg: #2d2d2d;
    --container-shadow: rgba(0, 0, 0, 0.3);
    --stat-box-bg: #3a3a3a;
    --stat-box-shadow: rgba(0, 0, 0, 0.2);
    --stat-box-border: #4a4a4a;
    --heading-color: #e6e6e6;
    --border-color: #444;
    --accent-color: #6c5ce7;
    --accent-hover: #8075e5;
    --info-item-bg: #3a3a3a;
    --info-item-border: #4a4a4a;
    --empty-message: #a0a0a0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.theme-switch {
    display: inline-block;
    height: 24px;
    position: relative;
    width: 48px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
}

.slider:before {
    background-color: white;
    bottom: 4px;
    content: "";
    height: 16px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 16px;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.theme-label {
    margin-left: 10px;
    font-size: 14px;
    color: var(--text-color);
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    background-color: var(--container-bg);
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--container-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--heading-color);
    font-size: 2.5rem;
    transition: color 0.3s ease;
}

.counter-container {
    margin-bottom: 30px;
}

textarea {
    width: 100%;
    height: 200px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    resize: vertical;
    font-size: 16px;
    transition: border 0.3s ease, background-color 0.3s ease, color 0.3s ease;
    margin-bottom: 20px;
    background-color: var(--container-bg);
    color: var(--text-color);
}

textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 5px var(--accent-color);
}

.button-container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}



button {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

#copy-btn {
    background-color: #2ecc71;
    color: white;
}

#copy-btn:hover {
    background-color: #27ae60;
}



#clear-btn {
    background-color: #e74c3c;
    color: white;
}

#clear-btn:hover {
    background-color: #c0392b;
}

.stats {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.stat-box {
    flex: 1;
    background-color: var(--stat-box-bg);
    padding: 15px;
    border-radius: 5px;
    text-align: center;
    border: 1px solid var(--stat-box-border);
    box-shadow: 0 2px 5px var(--stat-box-shadow);
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease, border 0.3s ease;
}

.stat-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.08);
    border-color: var(--accent-color);
}

.stat-box h2 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--heading-color);
    transition: color 0.3s ease;
}

.stat-box p {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-color);
    transition: color 0.3s ease;
}

.additional-info, .frequent-words {
    background-color: var(--stat-box-bg);
    padding: 20px;
    border-radius: 5px;
    border: 1px solid var(--stat-box-border);
    box-shadow: 0 2px 5px var(--stat-box-shadow);
    margin-bottom: 20px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border 0.3s ease;
}

.additional-info h3, .frequent-words h3 {
    margin-bottom: 15px;
    color: var(--heading-color);
    text-align: center;
    transition: color 0.3s ease;
}

.info-grid {
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.info-item {
    flex: 1;
    text-align: center;
    padding: 10px;
    background-color: var(--info-item-bg);
    border-radius: 5px;
    border: 1px solid var(--info-item-border);
    box-shadow: 0 2px 5px var(--stat-box-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border 0.3s ease, transform 0.3s ease;
}

.info-item h4 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--heading-color);
    transition: color 0.3s ease;
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
    border-color: var(--accent-color);
}

.info-item p {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    transition: color 0.3s ease;
}

.word-freq-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.word-freq-item {
    background-color: var(--accent-color);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    transition: transform 0.2s ease, background-color 0.3s ease;
}

.word-freq-item:hover {
    transform: scale(1.05);
    background-color: var(--accent-hover);
}

.word-count {
    background-color: var(--container-bg);
    color: var(--accent-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    margin-left: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.empty-message {
    color: var(--empty-message);
    font-style: italic;
    text-align: center;
    transition: color 0.3s ease;
}

@media (max-width: 768px) {
    .container {
        margin: 20px;
        padding: 15px;
    }
    
    .stats, .info-grid {
        flex-direction: column;
        gap: 10px;
    }
    
    .stat-box, .info-item {
        margin-bottom: 10px;
    }
    
    h1 {
        font-size: 2rem;
    }
}