/* Основные стили */
:root {
    --primary-color: #4361ee;
    --text-color: #2b2d42;
    --light-gray: #f8f9fa;
    --border-radius: 8px;
    --header-height: 60px;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-gray);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

/* Стили шапки */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0 15px;
}

.header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

.header__logo a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.5rem;
}

/* Стили чата */
.chat-container {
    display: flex;
    height: calc(100vh - var(--header-height));
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 0;
    background: #fff;
    margin: 0;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    width: 100%;
    box-sizing: border-box;
}

.message {
    margin-bottom: 15px;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    max-width: 85%;
    line-height: 1.5;
    word-wrap: break-word;
    position: relative;
}

.message.user {
    background: #e3f2fd;
    margin-left: auto;
    margin-right: 15px;
}

.message.assistant {
    background: #f1f1f1;
    margin-right: auto;
    margin-left: 15px;
}

.message-time {
    font-size: 0.7em;
    color: #777;
    text-align: right;
    margin-top: 5px;
    display: block;
}

#chat-form {
    display: flex;
    gap: 10px;
    background: #fff;
    padding: 15px;
    width: 100%;
    box-sizing: border-box;
    border-top: 1px solid #eee;
    position: sticky;
    bottom: 0;
}

#chat-form textarea {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    resize: none;
    min-height: 50px;
    max-height: 150px;
    font-family: inherit;
    box-sizing: border-box;
}

#chat-form button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background 0.3s;
    white-space: nowrap;
}

#chat-form button:hover {
    background: #3a56d0;
}

/* Мобильная версия */
@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }
    
    .header {
        padding: 0 10px;
    }
    
    .header__inner {
        padding: 0.8rem 0;
    }
    
    .chat-container {
        height: calc(100vh - var(--header-height));
    }
    
    .messages {
        padding: 10px;
    }
    
    .message {
        max-width: 90%;
        padding: 10px 12px;
        margin-bottom: 12px;
    }
    
    .message.user {
        margin-right: 10px;
    }
    
    .message.assistant {
        margin-left: 10px;
    }
    
    #chat-form {
        padding: 10px;
        flex-direction: row;
        align-items: center;
    }
    
    #chat-form textarea {
        min-height: 45px;
        padding: 10px;
    }
    
    #chat-form button {
        padding: 0 15px;
        height: 45px;
    }
}

/* Десктопная версия */
@media (min-width: 769px) {
    .chat-area {
        max-width: 800px;
        margin: 0 auto;
        padding: 0 15px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }
    
    .messages {
        padding: 20px 15px;
    }
}