:root {
    /* Светлая тема */
    --bg-color: #ffffff;
    --text-color: #333333;
    --input-bg: #f5f5f5;
    --border-color: #dddddd;
    --button-bg: #4CAF50;
    --button-hover: #45a049;
    --button-text: #ffffff;
}

[data-theme="dark"] {
    /* Темная тема */
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --input-bg: #2d2d2d;
    --border-color: #404040;
    --button-bg: #45a049;
    --button-hover: #4CAF50;
    --button-text: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

.converter-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.input-container, .result-container {
    margin-bottom: 2rem;
}

textarea {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: 'Consolas', monospace;
    font-size: 14px;
    resize: vertical;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--button-bg);
}

button {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 1rem auto;
    padding: 0.8rem;
    border: none;
    border-radius: 4px;
    background-color: var(--button-bg);
    color: var(--button-text);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

.output-wrapper {
    position: relative;
}

.copy-icon {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 40px;
    height: 40px;
    padding: 0.5rem;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
}

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

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    z-index: 1000;
}

/* Адаптивность */
@media (max-width: 768px) {
    .converter-container {
        margin: 1rem auto;
    }
    
    textarea {
        min-height: 150px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .converter-container {
        padding: 0 0.5rem;
    }
    
    button {
        max-width: 100%;
    }
}

.copy-button {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-button:hover {
    background-color: var(--button-hover);
    transform: scale(1.1);
}

.copy-button.success {
    background-color: #28a745;
}

.theme-switcher {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

.theme-switcher input {
    display: none;
}

.theme-switcher label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-switcher label:hover {
    background-color: var(--button-hover);
    transform: scale(1.1);
}

/* Анимация для кнопок */
@keyframes success {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.success {
    animation: success 0.3s ease-in-out;
}

.instruction-block, .example-block, .feedback-block {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.instruction-block h4, .example-block h4 {
    margin-top: 0;
    color: var(--text-primary);
}

.code-example {
    margin: 20px 0;
}

.code-example h5 {
    margin: 0 0 10px 0;
    color: var(--text-secondary);
}

.code-example pre {
    position: relative;
    background: var(--bg-code);
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
}

.copy-example {
    background: var(--bg-button);
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    color: var(--text-button);
    cursor: pointer;
    margin-top: 10px;
    transition: background 0.3s;
}

.copy-example:hover {
    background: var(--bg-button-hover);
}

.copy-example.success {
    background: var(--success-color);
}

.feedback-block {
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
    padding-top: 20px;
}

.credits {
    text-align: center;
    font-size: 0.9em;
    color: var(--text-secondary);
    margin-top: 30px;
}

code {
    background: var(--bg-code);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
}