/* ==========================================================================
   Chatbot Trợ lý Du lịch Cửa Lò
   ========================================================================== */

#chatbot-widget {
    --cb-primary: #0ea5e9;
    --cb-primary-dark: #0369a1;
    --cb-accent: #14b8a6;
    --cb-surface: #ffffff;
    --cb-canvas: #f2f7fb;
    --cb-border: #e2eaf2;
    --cb-text: #1f2d3d;
    --cb-muted: #6b7f95;
    --cb-radius: 20px;
    --cb-header-h: 68px;
    --cb-width: 384px;
    --cb-height: min(560px, calc(100vh - 150px));
    --cb-shadow: 0 24px 60px rgba(9, 47, 76, 0.22), 0 4px 14px rgba(9, 47, 76, 0.12);

    position: fixed;
    bottom: 70px;
    right: 15px;
    z-index: 9999;
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

#chatbot-widget.is-expanded {
    --cb-width: min(920px, calc(100vw - 48px));
    --cb-height: calc(100vh - 130px);
}

/* --------------------------------------------------------- Nút mở chat -- */

.chatbot-launcher {
    position: relative;
    width: 62px;
    height: 62px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: linear-gradient(140deg, var(--cb-primary), var(--cb-accent));
    box-shadow: 0 10px 24px rgba(2, 132, 199, 0.38);
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.chatbot-launcher img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}

.chatbot-launcher:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 16px 30px rgba(2, 132, 199, 0.45);
}

.chatbot-launcher:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.5);
    outline-offset: 3px;
}

/* Vòng sóng nhẹ để thu hút chú ý khi chat đang đóng */
.chatbot-launcher__ping {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid rgba(14, 165, 233, 0.55);
    animation: cb-ping 2.4s cubic-bezier(0, 0, 0.2, 1) infinite;
    pointer-events: none;
}

#chatbot-widget.is-open .chatbot-launcher__ping {
    display: none;
}

@keyframes cb-ping {
    0% { transform: scale(1); opacity: 0.7; }
    70%, 100% { transform: scale(1.5); opacity: 0; }
}

/* ------------------------------------------------------- Khung cửa sổ -- */

.chatbot-window {
    position: absolute;
    right: 0;
    bottom: 80px;
    display: flex;
    flex-direction: column;
    width: var(--cb-width);
    height: var(--cb-height);
    max-width: calc(100vw - 30px);
    background: var(--cb-surface);
    border-radius: var(--cb-radius);
    box-shadow: var(--cb-shadow);
    overflow: hidden;
    transform-origin: bottom right;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(0.94);
    pointer-events: none;
    transition: width 0.32s cubic-bezier(0.22, 1, 0.36, 1),
                height 0.32s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.22s ease,
                transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
                visibility 0.28s;
}

#chatbot-widget.is-open .chatbot-window {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

#chatbot-widget.is-minimized .chatbot-window {
    height: var(--cb-header-h);
}

/* ------------------------------------------------------------- Header -- */

.chatbot-header {
    flex: 0 0 var(--cb-header-h);
    height: var(--cb-header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 0 12px 0 16px;
    background: linear-gradient(125deg, #0284c7 0%, #0ea5e9 45%, #14b8a6 100%);
    color: #fff;
}

.chatbot-header__identity {
    display: flex;
    align-items: center;
    gap: 11px;
    min-width: 0;
}

.chatbot-header__avatar {
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.25);
    border: 2px solid rgba(255, 255, 255, 0.55);
}

.chatbot-header__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.chatbot-header__text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chatbot-header__title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #fff;
}

.chatbot-header__status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    opacity: 0.9;
    white-space: nowrap;
}

.chatbot-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7);
    animation: cb-pulse 2s infinite;
}

@keyframes cb-pulse {
    0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6); }
    70% { box-shadow: 0 0 0 7px rgba(74, 222, 128, 0); }
    100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

.chatbot-header__actions {
    display: flex;
    align-items: center;
    gap: 2px;
}

.chatbot-icon-btn {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 9px;
    background: transparent;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.chatbot-icon-btn:hover {
    background: rgba(255, 255, 255, 0.22);
    transform: translateY(-1px);
}

.chatbot-icon-btn:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 1px;
}

/* --------------------------------------------------------------- Body -- */

.chatbot-body {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
    opacity: 1;
    transition: opacity 0.2s ease;
}

#chatbot-widget.is-minimized .chatbot-body {
    opacity: 0;
    pointer-events: none;
}

.chatbot-messages {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px 16px;
    overflow-y: auto;
    overscroll-behavior: contain;
    background:
        radial-gradient(circle at 100% 0, rgba(20, 184, 166, 0.08), transparent 42%),
        radial-gradient(circle at 0 100%, rgba(14, 165, 233, 0.08), transparent 42%),
        var(--cb-canvas);
    scrollbar-width: thin;
    scrollbar-color: #c3d4e2 transparent;
}

.chatbot-messages::-webkit-scrollbar { width: 8px; }
.chatbot-messages::-webkit-scrollbar-thumb {
    background: #c8d8e6;
    border-radius: 8px;
    border: 2px solid transparent;
    background-clip: content-box;
}
.chatbot-messages::-webkit-scrollbar-thumb:hover { background: #a9c1d6; background-clip: content-box; }

/* ---------------------------------------------------------- Tin nhắn -- */

.message {
    max-width: 86%;
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--cb-text);
    word-wrap: break-word;
    overflow-wrap: anywhere;
    animation: cb-message-in 0.28s ease both;
}

@keyframes cb-message-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.message__content {
    padding: 11px 15px;
    border-radius: 18px;
}

.bot-msg {
    align-self: flex-start;
}

.bot-msg .message__content {
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-bottom-left-radius: 6px;
    box-shadow: 0 2px 10px rgba(16, 42, 67, 0.06);
}

.user-msg {
    align-self: flex-end;
}

.user-msg .message__content {
    background: linear-gradient(135deg, var(--cb-primary), var(--cb-primary-dark));
    color: #fff;
    border-bottom-right-radius: 6px;
    box-shadow: 0 6px 16px rgba(3, 105, 161, 0.28);
    white-space: pre-wrap;
}

.error-msg .message__content {
    background: #fef2f2;
    border-color: #fecaca;
    color: #b91c1c;
}

/* Khống chế độ dài dòng chữ khi mở rộng để vẫn dễ đọc */
#chatbot-widget.is-expanded .message {
    max-width: min(76%, 720px);
}

/* Markdown bên trong bong bóng của bot */
.bot-msg .message__content > *:first-child { margin-top: 0; }
.bot-msg .message__content > *:last-child { margin-bottom: 0; }

.bot-msg .message__content p { margin: 0 0 8px; }

.bot-msg .message__content h1,
.bot-msg .message__content h2,
.bot-msg .message__content h3,
.bot-msg .message__content h4,
.bot-msg .message__content h5,
.bot-msg .message__content h6 {
    margin: 14px 0 8px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--cb-primary-dark);
}

.bot-msg .message__content h1 { font-size: 17px; }
.bot-msg .message__content h2 { font-size: 16px; }
.bot-msg .message__content h3,
.bot-msg .message__content h4,
.bot-msg .message__content h5,
.bot-msg .message__content h6 { font-size: 15px; }

.bot-msg .message__content ul,
.bot-msg .message__content ol {
    margin: 6px 0 10px;
    padding-left: 20px;
}

.bot-msg .message__content li { margin-bottom: 5px; }
.bot-msg .message__content li::marker { color: var(--cb-accent); }

.bot-msg .message__content blockquote {
    margin: 8px 0;
    padding: 6px 12px;
    border-left: 3px solid var(--cb-accent);
    background: #f0fdfa;
    border-radius: 0 8px 8px 0;
    color: #0f766e;
}

.bot-msg .message__content code {
    padding: 1px 5px;
    border-radius: 5px;
    background: #eef2f7;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12.5px;
    color: #0f172a;
}

.bot-msg .message__content pre {
    margin: 8px 0;
    padding: 10px 12px;
    border-radius: 10px;
    background: #0f172a;
    color: #e2e8f0;
    overflow-x: auto;
}

.bot-msg .message__content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.bot-msg .message__content table {
    width: 100%;
    margin: 8px 0;
    border-collapse: collapse;
    font-size: 13px;
}

.bot-msg .message__content th,
.bot-msg .message__content td {
    padding: 6px 9px;
    border: 1px solid var(--cb-border);
    text-align: left;
}

.bot-msg .message__content th {
    background: #eff6fb;
    font-weight: 600;
}

.bot-msg .message__content hr {
    margin: 12px 0;
    border: none;
    border-top: 1px solid var(--cb-border);
}

.bot-msg .message__content a {
    color: var(--cb-primary-dark);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.2s ease;
}

.bot-msg .message__content a:hover { color: var(--cb-accent); }

/* ------------------------------------------------- Nguồn tham khảo -- */

.bot-sources {
    margin-top: 8px;
    padding-left: 4px;
}

.bot-sources__label {
    display: block;
    margin-bottom: 5px;
    font-size: 11.5px;
    font-weight: 700;
    color: var(--cb-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.bot-sources__list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.source-link {
    display: inline-block;
    max-width: 100%;
    padding: 4px 11px;
    border: 1px solid #b9e6f0;
    border-radius: 999px;
    background: #ecfeff;
    color: #0e7490;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease;
}

.source-link:hover {
    background: #cffafe;
    color: #0e7490;
    transform: translateY(-1px);
    text-decoration: none;
}

/* ------------------------------------------------------ Đang soạn -- */

.typing-dots {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 0;
}

.typing-dots i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--cb-primary);
    opacity: 0.45;
    animation: cb-typing 1.3s infinite ease-in-out;
}

.typing-dots i:nth-child(2) { animation-delay: 0.18s; }
.typing-dots i:nth-child(3) { animation-delay: 0.36s; }

@keyframes cb-typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* ------------------------------------------------- Gợi ý nhanh -- */

.chatbot-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    padding: 10px 14px 2px;
    background: var(--cb-surface);
}

.chatbot-suggestions.is-hidden { display: none; }

.chatbot-chip {
    padding: 6px 13px;
    border: 1px solid #cfe6f5;
    border-radius: 999px;
    background: #f4fbff;
    color: var(--cb-primary-dark);
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.chatbot-chip:hover {
    background: #e0f2fe;
    border-color: var(--cb-primary);
    transform: translateY(-1px);
}

/* ---------------------------------------------------------- Nhập -- */

.chatbot-input {
    display: flex;
    align-items: flex-end;
    gap: 9px;
    padding: 12px 14px;
    background: var(--cb-surface);
    border-top: 1px solid var(--cb-border);
}

#chatbot-input-field {
    flex: 1 1 auto;
    max-height: 110px;
    padding: 10px 15px;
    border: 1px solid var(--cb-border);
    border-radius: 18px;
    background: #f7fafc;
    color: var(--cb-text);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.45;
    resize: none;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

#chatbot-input-field:focus {
    background: #fff;
    border-color: var(--cb-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.16);
}

#chatbot-send-btn {
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--cb-primary), var(--cb-primary-dark));
    color: #fff;
    font-size: 15px;
    cursor: pointer;
    box-shadow: 0 6px 14px rgba(3, 105, 161, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

#chatbot-send-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(3, 105, 161, 0.36);
}

#chatbot-send-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    box-shadow: none;
}

/* ----------------------------------------------------- Responsive -- */

@media (max-width: 640px) {
    #chatbot-widget {
        bottom: 60px;
        right: 12px;
    }

    .chatbot-window,
    #chatbot-widget.is-expanded .chatbot-window {
        position: fixed;
        inset: 0;
        width: 100%;
        max-width: 100%;
        height: 100%;
        border-radius: 0;
        transform-origin: bottom center;
    }

    #chatbot-widget.is-minimized .chatbot-window {
        inset: auto 0 0 0;
        height: var(--cb-header-h);
    }

    #chatbot-widget.is-open .chatbot-launcher,
    #chatbot-expand-btn {
        display: none;
    }

    /* Chừa chỗ cho thanh home indicator trên iPhone */
    .chatbot-input {
        padding-bottom: max(12px, env(safe-area-inset-bottom));
    }

    .message,
    #chatbot-widget.is-expanded .message {
        max-width: 92%;
    }
}

@media (prefers-reduced-motion: reduce) {
    #chatbot-widget *,
    #chatbot-widget *::before,
    #chatbot-widget *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}