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

:root {
    --telegram-blue: #0088cc;
    --telegram-light-blue: #64b5f6;
    --bot-bg: #f0f0f0;
    --user-bg: #0088cc;
    --text-dark: #000000;
    --text-light: #ffffff;
    --bg-main: #ffffff;
    --header-bg: #0088cc;
    --status-green: #4caf50;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow-x: hidden;
}

.chat-container {
    width: 100%;
    max-width: 480px;
    height: 90vh;
    max-height: 820px;
    background: var(--bg-main);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.chat-header {
    background: var(--header-bg);
    color: var(--text-light);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.back-arrow {
    font-size: 24px;
    cursor: pointer;
    opacity: 0.9;
}

.bot-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--header-bg);
}

.bot-avatar svg {
    width: 28px;
    height: 28px;
}

.header-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.bot-name {
    font-size: 16px;
    font-weight: 600;
}

.bot-status {
    font-size: 13px;
    opacity: 0.85;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 16px 100px;
    background: linear-gradient(to bottom, #e3f2fd 0%, #ffffff 100%);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.message-wrapper {
    display: flex;
    animation: messageSlide 0.4s ease-out;
    opacity: 0;
    animation-fill-mode: forwards;
}

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

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

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

.message {
    max-width: 75%;
    padding: 10px 14px;
    border-radius: 12px;
    position: relative;
    word-wrap: break-word;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.bot-message {
    background: var(--bot-bg);
    color: var(--text-dark);
    border-bottom-left-radius: 4px;
}

.user-message {
    background: var(--user-bg);
    color: var(--text-light);
    border-bottom-right-radius: 4px;
}

.message-text {
    font-size: 15px;
    line-height: 1.5;
    margin-bottom: 4px;
}

.message-time {
    font-size: 11px;
    opacity: 0.6;
    text-align: right;
}

.cta-message {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    animation: messageSlide 0.4s ease-out;
    animation-delay: 0.3s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.telegram-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #0088cc 0%, #0077b3 100%);
    color: var(--text-light);
    padding: 14px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.4);
    transition: all 0.3s ease;
    cursor: pointer;
}

.telegram-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 136, 204, 0.5);
    background: linear-gradient(135deg, #0099dd 0%, #0088cc 100%);
}

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

.telegram-button svg {
    width: 24px;
    height: 24px;
}

.chat-input-area {
    padding: 12px 16px;
    background: var(--bg-main);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f5f5f5;
    border-radius: 24px;
    padding: 8px 12px;
}

.input-wrapper input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 15px;
    outline: none;
    color: #999;
}

.send-button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--telegram-blue);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-light);
}

.send-button svg {
    width: 20px;
    height: 20px;
}

.send-button:hover {
    background: var(--telegram-light-blue);
}

@media (max-width: 520px) {
    body {
        padding: 0;
    }

    .chat-container {
        max-width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
    }
}

@media (max-height: 700px) {
    .chat-messages {
        padding-bottom: 80px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .chat-container,
    .message-wrapper,
    .cta-message {
        animation: none;
        opacity: 1;
    }

    .telegram-button:hover {
        transform: none;
    }
}