:root {
    --primary-bg: #0B0B0F;
    --secondary-bg: #16161D;
    --panel-bg: #121219;
    --primary-text: #F5F5F7;
    --secondary-text: #9CA3AF;
    --accent-color: #8B5CF6;
    --accent-hover: #A78BFA;
    --transition-speed: 0.3s;
}

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

body {
    min-height: 100vh;
    font-family: 'Inter', sans-serif;
    color: var(--primary-text);
    background:
        radial-gradient(circle at 12% 10%, rgba(139, 92, 246, 0.13), transparent 30%),
        radial-gradient(circle at 84% 88%, rgba(167, 139, 250, 0.1), transparent 30%),
        var(--primary-bg);
}

.chat-app {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.chat-window {
    width: min(100%, 1200px);
    height: min(92vh, 880px);
    display: grid;
    grid-template-columns: 320px 1fr;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    background: var(--secondary-bg);
}

.chat-sidebar {
    background: linear-gradient(180deg, rgba(18, 18, 25, 0.95) 0%, rgba(16, 16, 22, 0.95) 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.07);
    padding: 18px 14px;
}

.sidebar-title {
    font-size: 0.82rem;
    color: var(--secondary-text);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 14px;
    padding: 0 8px;
}

.sidebar-chat {
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 12px;
    padding: 10px 8px;
}

.sidebar-chat.active {
    background: rgba(139, 92, 246, 0.14);
    border: 1px solid rgba(167, 139, 250, 0.24);
}

.sidebar-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(255, 255, 255, 0.16);
}

.sidebar-chat h2 {
    font-size: 0.95rem;
    line-height: 1.2;
}

.sidebar-chat p {
    font-size: 0.8rem;
    color: var(--secondary-text);
}

.chat-main {
    display: grid;
    grid-template-rows: auto 1fr auto;
    background: var(--secondary-bg);
}

.chat-topbar {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(11, 11, 15, 0.72);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.bot-profile {
    display: flex;
    align-items: center;
    gap: 11px;
}

.bot-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(167, 139, 250, 0.52);
}

.bot-profile h1 {
    font-size: 1rem;
    line-height: 1.15;
}

.bot-status {
    color: var(--secondary-text);
    font-size: 0.84rem;
}

.chat-header-actions {
    position: relative;
}

.chat-menu-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 3px;
    cursor: pointer;
    transition: opacity var(--transition-speed);
}

.chat-menu-btn:hover {
    opacity: 0.8;
}

.chat-menu-btn span {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary-text);
}

.chat-menu-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 170px;
    background: #1c1c25;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--transition-speed), transform var(--transition-speed), visibility var(--transition-speed);
    z-index: 20;
}

.chat-menu-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.chat-menu-item {
    width: 100%;
    border: none;
    background: transparent;
    color: #f5b4bc;
    text-align: left;
    border-radius: 8px;
    padding: 9px 10px;
    font-size: 0.88rem;
    cursor: pointer;
}

.chat-menu-item:hover {
    background: rgba(244, 114, 182, 0.12);
}

.chat-messages {
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-image:
        linear-gradient(rgba(11, 11, 15, 0.33), rgba(11, 11, 15, 0.33)),
        radial-gradient(circle at 0% 0%, rgba(139, 92, 246, 0.08), transparent 36%),
        radial-gradient(circle at 100% 100%, rgba(167, 139, 250, 0.08), transparent 36%);
}

.message-row {
    display: flex;
    width: 100%;
}

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

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

.message {
    max-width: min(78%, 640px);
    padding: 9px 12px 8px;
    border-radius: 7.5px;
    font-size: 0.95rem;
    line-height: 1.4;
    position: relative;
}

.message.bot {
    background: #ffffff;
    color: #1f2937;
    border: 1px solid rgba(224, 224, 224, 0.95);
    border-radius: 11px;
}

.message.user {
    background: rgba(167, 139, 250, 0.25);
    color: #f5f5f7;
    border: 1px solid rgba(139, 92, 246, 0.42);
    border-radius: 11px;
}

.message-content {
    margin-bottom: 5px;
}

.message-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.message-time {
    font-size: 0.7rem;
    color: #8a8f98;
    letter-spacing: 0.01em;
}

.message.user .message-time {
    color: #6d4ed7;
}

.message.user.has-reaction {
    margin-bottom: 10px;
}

.message-reaction {
    position: absolute;
    right: 8px;
    bottom: -13px;
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    padding: 2px 8px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
    font-size: 0.82rem;
    line-height: 1;
}

.message-reaction.reaction-pop {
    animation: reaction-pop 0.5s ease;
}

.reaction-emoji {
    font-size: 0.95rem;
}

.reaction-count {
    color: #666;
    font-weight: 600;
}

.message-row.options-row {
    margin-top: 2px;
    padding-left: 4px;
}

.quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-width: min(80%, 640px);
}

.quick-replies.hidden {
    display: none;
}

.reply-btn {
    border: 1px solid rgba(139, 92, 246, 0.72);
    background: rgba(139, 92, 246, 0.22);
    color: #DDD6FE;
    border-radius: 18px;
    padding: 8px 12px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), transform var(--transition-speed);
}

.reply-btn:hover {
    background: rgba(139, 92, 246, 0.3);
    border-color: rgba(167, 139, 250, 0.9);
    transform: translateY(-1px);
}

.reply-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.typing-bubble {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-width: 48px;
}

.typing-bubble span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #8a8f98;
    opacity: 0.45;
    animation: typing-dot 1.7s infinite ease-in-out;
}

.typing-bubble span:nth-child(2) {
    animation-delay: 0.14s;
}

.typing-bubble span:nth-child(3) {
    animation-delay: 0.28s;
}

.chat-input-area {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(11, 11, 15, 0.8);
    padding: 10px 12px;
}

.chat-composer {
    position: relative;
}

.chat-input-row {
    position: relative;
}

.chat-input-hint {
    min-height: 18px;
    margin-bottom: 6px;
    font-size: 0.82rem;
    color: #f9a8d4;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.chat-input-hint.visible {
    opacity: 1;
}

.chat-input {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.05);
    color: var(--primary-text);
    border-radius: 999px;
    padding: 11px 50px 11px 14px;
    font-size: 0.94rem;
    outline: none;
}

.chat-input::placeholder {
    color: rgba(156, 163, 175, 0.9);
}

.chat-input:focus {
    border-color: rgba(167, 139, 250, 0.68);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
}

.chat-input.invalid {
    border-color: rgba(244, 114, 182, 0.78);
    box-shadow: 0 0 0 2px rgba(244, 114, 182, 0.18);
}

.send-btn {
    position: absolute;
    top: 50%;
    right: 6px;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border: 1px solid rgba(167, 139, 250, 0.56);
    background: rgba(139, 92, 246, 0.18);
    color: var(--primary-text);
    border-radius: 999px;
    padding: 0;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), transform var(--transition-speed);
}

.send-btn:hover {
    background: rgba(139, 92, 246, 0.28);
    border-color: rgba(167, 139, 250, 0.78);
    transform: translateY(-50%) scale(1.03);
}

@keyframes typing-dot {
    0%,
    80%,
    100% {
        opacity: 0.35;
        transform: translateY(0);
    }

    40% {
        opacity: 1;
        transform: translateY(-2px);
    }
}

@keyframes reaction-pop {
    0% {
        transform: scale(0.7);
        opacity: 0.35;
    }

    55% {
        transform: scale(1.18);
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@media (max-width: 900px) {
    .chat-app {
        padding: 0;
    }

    .chat-window {
        width: 100%;
        height: 100vh;
        border-radius: 0;
        border: none;
        grid-template-columns: 1fr;
    }

    .chat-sidebar {
        display: none;
    }

    .message {
        max-width: 88%;
    }

    .quick-replies {
        max-width: 92%;
    }
}