:root {
    --primary-color: #FF7F50;
    --primary-hover: #FFB273;
    --background-color: #ffffff;
    --sidebar-color: #f8f9fa;
    --sidebar-header-color: #ffffff;
    --text-color: #333333;
    --secondary-text-color: #666666;
    --accent-color: #f0f2f5;
    --hover-color: #e4e6eb;
    --message-bg-user: linear-gradient(135deg, #FF7F50, #FF6347);
    --message-bg-bot: #ffffff;
    --scrollbar-bg: #f0f2f5;
    --scrollbar-thumb: var(--primary-color);
    --scrollbar-thumb-hover: var(--primary-hover);
    --border-radius: 12px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

/* Улучшенные стили для скроллбара */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-bg);
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: var(--border-radius);
    border: 2px solid var(--scrollbar-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

/* Основные стили */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Прелоадер */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #1e1e1e;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    transition: opacity 0.5s ease;
}

#preloader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.preloader-logo {
    width: 100px;
    height: auto;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.9);
        opacity: 0.7;
    }
    50% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(0.9);
        opacity: 0.7;
    }
}

/* Кнопка меню для мобильных устройств */
.menu-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1001;
    background: var(--primary-color);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.menu-toggle:hover {
    background: var(--primary-hover);
}

/* Улучшенный сайдбар */
.sidebar {
    width: 320px;
    background: var(--sidebar-color);
    border-right: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.sidebar-header {
    padding: 24px;
    background: var(--sidebar-header-color);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: var(--box-shadow);
    position: relative;
}

.sidebar-header h2 {
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 20px;
    text-align: left;
    margin-right: 36px;
    background: linear-gradient(135deg, #FF7F50, #FF6347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
}

.delete-all-chats {
    position: absolute;
    top: 28px;
    right: 16px;
    background: transparent;
    border: none;
    color: #FF6347;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    font-size: 16px;
    transition: var(--transition);
    opacity: 0.7;
    z-index: 10;
}

.delete-all-chats:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* Контейнер для создания чатов */
.chat-creation-container {
    position: relative;
    width: 100%;
}

.create-chat-dropdown-btn {
    background: linear-gradient(135deg, #FF7F50, #FF6347);
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    box-shadow: var(--box-shadow);
}

.create-chat-dropdown-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 99, 71, 0.3);
}

.create-chat-dropdown-btn:active {
    transform: translateY(0);
    background: linear-gradient(135deg, #FF6347, #FF4500);
}

.dropdown-arrow {
    transition: var(--transition);
}

.create-chat-dropdown-btn.active .dropdown-arrow {
    transform: rotate(180deg);
}

/* Выпадающий список */
.chat-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
    margin-top: 4px;
}

.chat-dropdown.show {
    max-height: 400px;
    overflow-y: auto;
}

.dropdown-item {
    background: transparent;
    border: none;
    padding: 12px 16px;
    width: 100%;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
    font-size: 14px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--accent-color);
    color: var(--primary-color);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    color: var(--primary-color);
}

.dropdown-item:hover i {
    color: var(--primary-hover);
}

/* Улучшенный список чатов */
.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    list-style: none;
}

.chat-list li {
    margin-bottom: 8px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.chat-name-container {
    padding: 12px 16px;
    background: var(--accent-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.chat-name-container i {
    font-size: 16px;
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.chat-name {
    flex: 1;
    color: var(--text-color);
}

.chat-name-container:hover {
    background: var(--hover-color);
    transform: translateX(4px);
}

.chat-list li.active .chat-name-container {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
}

.chat-list li.active .chat-name-container i,
.chat-list li.active .chat-name {
    color: white;
}

/* Улучшенная основная область */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
    position: relative;
}

/* Улучшенная история чата */
.chat-history {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    background: var(--accent-color);
}

.chat-message {
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeIn 0.3s ease forwards;
    display: flex;
    flex-direction: column;
}

.chat-message.user {
    align-items: flex-end;
}

.chat-message.bot {
    align-items: flex-start;
}

.message-content {
    max-width: 85%;
    padding: 16px;
    border-radius: var(--border-radius);
    position: relative;
    line-height: 1.6;
    box-shadow: var(--box-shadow);
    word-wrap: break-word;
    white-space: pre-wrap;
    font-size: 15px;
}

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin: 1.5em 0 0.5em;
    font-weight: 600;
    line-height: 1.25;
}

.message-content h1 { font-size: 2em; }
.message-content h2 { font-size: 1.5em; }
.message-content h3 { font-size: 1.25em; }
.message-content h4 { font-size: 1em; }
.message-content h5 { font-size: 0.875em; }
.message-content h6 { font-size: 0.85em; }

.message-content p {
    margin: 0.75em 0;
}

.message-content ul,
.message-content ol {
    margin: 0.5em 0;
    padding-left: 2em;
}

.message-content li {
    margin: 0.25em 0;
}

.message-content blockquote {
    margin: 1em 0;
    padding: 0.5em 1em;
    border-left: 4px solid var(--primary-color);
    background: rgba(255, 127, 80, 0.1);
    color: #666;
}

.message-content hr {
    margin: 1.5em 0;
    border: none;
    border-top: 2px solid rgba(0, 0, 0, 0.1);
}

.message-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
}

.message-content th,
.message-content td {
    padding: 8px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    text-align: left;
}

.message-content th {
    background: rgba(255, 127, 80, 0.1);
    font-weight: 600;
}

.message-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.message-content a:hover {
    text-decoration: underline;
}

.message-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1em 0;
}

.chat-message.user .message-content blockquote {
    border-left-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
}

.chat-message.user .message-content a {
    color: white;
    text-decoration: underline;
}

.chat-message.user .message-content th {
    background: rgba(255, 255, 255, 0.1);
}

.chat-message.user .message-content code {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.chat-message.user .message-content {
    background: var(--message-bg-user);
    color: white;
}

.chat-message.bot .message-content {
    background: var(--message-bg-bot);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-color);
}

/* Улучшенная область ввода */
.input-area {
    padding: 24px;
    background: var(--sidebar-color);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    position: relative;
}

.input-area textarea {
    width: 100%;
    min-height: 50px;
    max-height: 200px;
    padding: 12px 16px;
    padding-right: 60px;
    background: var(--background-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-size: 15px;
    resize: none;
    transition: var(--transition);
    line-height: 1.5;
}

.input-area textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(255, 127, 80, 0.1);
}

.input-area button {
    position: absolute;
    right: 32px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #FF7F50, #FF6347);
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.input-area button:hover {
    transform: translateY(-50%) scale(1.1);
    background: linear-gradient(135deg, #FF6347, #FF4500);
}

.input-area button:active {
    transform: translateY(-50%) scale(0.95);
    background: linear-gradient(135deg, #FF4500, #FF3300);
}

/* Улучшенные кнопки копирования и регенерации */
.message-controls {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: var(--transition);
}

.message-content:hover .message-controls {
    opacity: 1;
}

.copy-btn, .regenerate-btn, .copy-code-btn {
    background: linear-gradient(135deg, #FF7F50, #FF6347);
    border: none;
    padding: 6px;
    border-radius: 6px;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    box-shadow: var(--box-shadow);
}

.copy-btn:hover, .regenerate-btn:hover, .copy-code-btn:hover {
    background: linear-gradient(135deg, #FF6347, #FF4500);
    transform: translateY(-1px);
}

.copy-btn:active, .regenerate-btn:active, .copy-code-btn:active {
    background: linear-gradient(135deg, #FF4500, #FF3300);
    transform: translateY(0);
}

/* Улучшенное уведомление о копировании */
.copy-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 500;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 8px;
}

.copy-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Стили для кода в сообщениях */
.message-content pre {
    background: #f8f9fa;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.message-content code {
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    background: #f8f9fa;
    padding: 2px 6px;
    border-radius: 4px;
    color: #FF6347;
}

.message-content pre code {
    padding: 0;
    background: transparent;
    color: #333;
    display: block;
    white-space: pre;
}

.message-content pre .copy-code-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    opacity: 0;
    transition: var(--transition);
}

.message-content pre:hover .copy-code-btn {
    opacity: 1;
}

/* Улучшенные стили для inline кода */
.message-content p code {
    background: rgba(255, 99, 71, 0.1);
    color: #FF6347;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Улучшенные стили для меню чата */
.chat-menu {
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--background-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    min-width: 180px;
    display: none;
    margin-top: 4px;
}

.chat-menu.show {
    display: block;
}

.chat-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.chat-menu li {
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
}

.chat-menu li:hover {
    background: var(--accent-color);
}

.chat-menu li i {
    width: 20px;
    text-align: center;
    color: #FF6347;
}

.menu-btn {
    background: transparent;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0.7;
    transition: var(--transition);
    margin-left: auto;
    z-index: 10;
}

.menu-btn:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.05);
}

/* Индикатор загрузки */
.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.loading-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 0.5s ease-in-out infinite;
}

.dot:nth-child(2) {
    animation-delay: 0.1s;
}

.dot:nth-child(3) {
    animation-delay: 0.2s;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Медиа-запросы для мобильных устройств */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -320px;
        top: 0;
        bottom: 0;
        z-index: 1000;
        background: var(--background-color);
    }

    .sidebar.sidebar-open {
        left: 0;
    }

    .menu-toggle {
        display: block;
        position: fixed;
        top: 16px;
        left: 16px;
        z-index: 1001;
        background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
        border: none;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        color: white;
        font-size: 24px;
        cursor: pointer;
        transition: var(--transition);
        box-shadow: var(--box-shadow);
    }

    .menu-toggle:hover {
        transform: scale(1.1);
    }

    .main {
        padding-top: 60px;
    }

    .message-content {
        max-width: 90%;
    }

    .input-area {
        padding: 16px;
    }

    .input-area button {
        right: 24px;
    }
}