* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9edf2 100%);
    min-height: 100vh;
    color: #2c3e50;
}

/* Основное приложение */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    .app {
        margin: 20px auto;
        height: calc(100vh - 40px);
        border-radius: 24px;
        overflow: hidden;
    }
}

/* Шапка приложения */
.app-header {
    background: linear-gradient(135deg, #0066CC 0%, #0052a3 100%);
    color: white;
    padding: 20px 24px;
    flex-shrink: 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo svg {
    width: 32px;
    height: 32px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
    margin-left: 44px;
}

@media (max-width: 480px) {
    .app-header {
        padding: 16px 20px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .subtitle {
        font-size: 12px;
        margin-left: 44px;
    }
}

/* Основная область */
.app-main {
    flex: 1;
    overflow: hidden;
    background: #f8f9fa;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Область сообщений */
.messages-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 480px) {
    .messages-area {
        padding: 16px;
        gap: 12px;
    }
}

/* Сообщения */
.message {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    animation: fadeIn 0.3s ease;
}

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

.bot-message {
    justify-content: flex-start;
}

.user-message {
    justify-content: flex-end;
}

/* Аватар сообщения */
.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s;
}

.bot-avatar {
    background: linear-gradient(135deg, #0066CC 0%, #0052a3 100%);
    color: white;
}

.user-avatar {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.message-avatar svg {
    width: 18px;
    height: 18px;
}

/* Пузырь сообщения */
.message-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 15px;
    line-height: 1.4;
    word-wrap: break-word;
}

@media (max-width: 480px) {
    .message-bubble {
        max-width: 85%;
        padding: 10px 14px;
        font-size: 14px;
    }
}

.bot-bubble {
    background: white;
    color: #2c3e50;
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.user-bubble {
    background: linear-gradient(135deg, #0066CC 0%, #0052a3 100%);
    color: white;
    border-bottom-right-radius: 4px;
}

/* Область ввода */
.input-container {
    padding: 16px 20px;
    background: white;
    border-top: 1px solid #e5e7eb;
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .input-container {
        padding: 12px 16px;
    }
}

.input-wrapper {
    display: flex;
    gap: 12px;
    max-width: 1200px;
    margin: 0 auto;
}

.message-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 24px;
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: all 0.2s;
    background: #f9fafb;
}

.message-input:focus {
    border-color: #0066CC;
    background: white;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

@media (max-width: 480px) {
    .message-input {
        padding: 10px 14px;
        font-size: 16px;
    }
}

.send-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #0066CC 0%, #0052a3 100%);
    color: white;
    border: none;
    border-radius: 24px;
    font-size: 15px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.send-button svg {
    width: 18px;
    height: 18px;
}

.send-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.send-button:active {
    transform: translateY(0);
}

@media (max-width: 480px) {
    .send-button {
        padding: 10px 20px;
    }
    
    .send-button span {
        display: none;
    }
    
    .send-button svg {
        width: 20px;
        height: 20px;
    }
}

/* Индикатор печати */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: white;
    border-radius: 18px;
    border-bottom-left-radius: 4px;
    width: fit-content;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background: #9ca3af;
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Кнопка авторизации */
.auth-button {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 24px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    margin-top: 8px;
    transition: all 0.2s;
    width: 100%;
}

.auth-button:active {
    transform: scale(0.98);
}

/* Стили для скроллбара */
.messages-area::-webkit-scrollbar {
    width: 6px;
}

.messages-area::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.messages-area::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.messages-area::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Для Firefox */
.messages-area {
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f1f1f1;
}

/* Улучшения для мобильных устройств */
@media (hover: none) and (pointer: coarse) {
    .send-button:hover {
        transform: none;
    }
    
    .send-button:active {
        transform: scale(0.98);
    }
}

/* Предотвращение масштабирования при фокусе на iOS */
@media (max-width: 768px) {
    input, textarea {
        font-size: 16px !important;
    }
}

/* Анимации для мобильных */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}