:root {
    --primary-color: #2c3e50;
    --secondary-color: #e74c3c;
    --accent-color: #3498db;
    --background-color: #f8f9fa;
    --text-color: #2c3e50;
    --light-color: #ecf0f1;
    --card-color: #ffffff;
    --border-color: #dadce0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

/* Шапка */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: white;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
}

.logo-subtitle {
    font-size: 0.8rem;
    opacity: 0.8;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
}

.nav a:hover {
    color: var(--accent-color);
}

/* Главная страница */
.hero {
    padding: 3rem 0;
    text-align: center;
    flex: 1;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 3rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.tool-card {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.tool-card:hover {
    transform: translateY(-5px);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tool-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Страницы инструментов */
.tool-page {
    flex: 1;
    padding: 2rem 0;
}

.tool-container {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 800px;
    margin: 0 auto;
}

.tool-container h1 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.tool-description {
    text-align: center;
    margin-bottom: 2rem;
    color: #666;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    min-height: 120px;
    resize: vertical;
}

.input-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.setting-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.setting-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: #2980b9;
}

.btn-secondary {
    background: var(--secondary-color);
}

.btn-secondary:hover {
    background: #c0392b;
}

.result {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
    border-left: 4px solid var(--accent-color);
}

.result h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.output {
    font-family: monospace;
    padding: 1rem;
    background: white;
    border-radius: 4px;
    min-height: 40px;
}

/* Сохраненный футер из документа */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 3rem 0 2rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--light-color);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 20px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.social-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background 0.3s;
}

.social-links a:hover {
    background: rgba(255,255,255,0.1);
}

/* Адаптивность */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        gap: 1rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .settings {
        grid-template-columns: 1fr;
    }
    
    .buttons {
        flex-direction: column;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .tool-container {
        padding: 1rem;
    }
}