:root {
    --v-bg: #eceef6;
    --v-bg-accent: #e2e5f0;
    --v-surface: #ffffff;
    --v-ink: #0f172a;
    --v-ink-muted: #64748b;
    --v-border: #e2e8f0;
    /* 与后台统一的靛蓝品牌色 */
    --v-accent: #4f46e5;
    --v-accent-rgb: 79, 70, 229;
    --v-accent-hover: #4338ca;
    --v-accent-soft: rgba(var(--v-accent-rgb), 0.12);
    --v-accent-end: #818cf8;
    --v-live: #059669;
    --v-radius: 16px;
    --v-radius-sm: 12px;
    --v-shadow: 0 4px 24px rgba(15, 23, 42, 0.07), 0 1px 3px rgba(15, 23, 42, 0.04);
    --v-shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.11), 0 0 0 1px rgba(15, 23, 42, 0.035);
    --v-btn-elev: 0 4px 14px rgba(var(--v-accent-rgb), 0.28), 0 0 0 1px rgba(255, 255, 255, 0.2) inset;
    --v-btn-elev-hover: 0 12px 32px rgba(var(--v-accent-rgb), 0.38), 0 0 0 1px rgba(255, 255, 255, 0.22) inset;
    --v-font: system-ui, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    --app-vh: 100vh;
}

html {
    font-size: 16px;
    color-scheme: light;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    /* 微信内置浏览器对 100vh 计算异常时，配合 body 的 -webkit-fill-available 减少整页空白 */
    min-height: -webkit-fill-available;
    min-height: 100%;
}

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

body {
    font-family: var(--v-font);
    min-height: -webkit-fill-available;
    min-height: var(--app-vh);
    height: -webkit-fill-available;
    height: var(--app-vh);
    overflow: hidden;
    color: var(--v-ink);
    line-height: 1.5;
    background:
        radial-gradient(1200px 600px at 8% -8%, rgba(var(--v-accent-rgb), 0.1), transparent 55%),
        radial-gradient(900px 500px at 100% 100%, rgba(5, 150, 105, 0.065), transparent 50%),
        linear-gradient(165deg, var(--v-bg) 0%, var(--v-bg-accent) 100%);
    -webkit-font-smoothing: antialiased;
}

/* 消息区已清空且无欢迎卡时的占位（避免白屏） */
.visitor-empty-thread {
    padding: 24px 18px;
    text-align: center;
}

.visitor-empty-thread__text {
    font-size: 14px;
    color: var(--v-ink-muted);
    line-height: 1.6;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

::selection {
    background: var(--v-accent-soft);
    color: var(--v-ink);
}

.connection-banner,
.chat-error-banner {
    border-radius: var(--v-radius-sm);
    padding: 12px 14px;
    font-size: 13px;
    line-height: 1.5;
    border: 1px solid rgba(239, 68, 68, 0.25);
    background: linear-gradient(180deg, #fff5f5 0%, #fff 100%);
    color: #b91c1c;
    margin: 10px 14px 0;
    box-shadow: 0 4px 16px rgba(185, 28, 28, 0.08);
}

/* 微信内置浏览器：引导用系统浏览器打开（扫码进入常见） */
.wechat-inapp-banner {
    flex-shrink: 0;
    padding: 10px 14px 12px;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: #9a3412;
    background: linear-gradient(180deg, #fff7ed 0%, #ffedd5 100%);
    border-bottom: 1px solid #fdba74;
}

.wechat-inapp-banner--warn {
    color: #991b1b;
    background: linear-gradient(180deg, #fff1f2 0%, #ffe4e6 100%);
    border-bottom-color: #fda4af;
}

.wechat-inapp-banner--warn .wechat-inapp-banner__text strong {
    color: #7f1d1d;
}

.wechat-inapp-banner__inner {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.wechat-inapp-banner__icon {
    flex-shrink: 0;
    font-size: 1.1rem;
    line-height: 1.2;
}

.wechat-inapp-banner__text {
    flex: 1;
    min-width: 0;
    margin: 0;
}

.wechat-inapp-banner__text strong {
    font-weight: 700;
    color: #7c2d12;
}

.wechat-inapp-banner__btn {
    flex-shrink: 0;
    margin-top: 2px;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #ea580c, #f97316);
    border: none;
    border-radius: 999px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(234, 88, 12, 0.35);
}

.wechat-inapp-banner__btn:active {
    opacity: 0.92;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: -webkit-fill-available;
    height: var(--app-vh);
    max-height: -webkit-fill-available;
    max-height: var(--app-vh);
    width: 100%;
    max-width: min(100%, 440px);
    margin: 0 auto;
    background: var(--v-surface);
    position: relative;
    z-index: 1;
    box-shadow: var(--v-shadow-lg);
}

.compliance-footer {
    flex-shrink: 0;
    padding: 8px 14px calc(8px + env(safe-area-inset-bottom, 0));
    border-top: 1px solid var(--v-border);
    background: rgba(15, 23, 42, 0.02);
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    justify-content: center;
    color: var(--v-ink-muted);
    font-size: 0.75rem;
    line-height: 1.5;
}

.compliance-footer__item {
    white-space: nowrap;
}

/* —— Header —— */
.chat-header {
    flex-shrink: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 18px 16px;
    background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
    border-bottom: 1px solid var(--v-border);
}

/* ===== Visitor UI/UX global polish ===== */
.chat-container {
    border-left: 1px solid rgba(15, 23, 42, 0.05);
    border-right: 1px solid rgba(15, 23, 42, 0.05);
}

.chat-messages {
    scroll-behavior: smooth;
}

/* 微信软键盘弹出时，避免滚动/过渡动画造成的抖动 */
body.keyboard-open .chat-messages {
    scroll-behavior: auto;
}

body.keyboard-open .chat-header,
body.keyboard-open .chat-input-area,
body.keyboard-open .message {
    transition: none !important;
}

body.keyboard-open .compliance-footer {
    display: none;
}

.message {
    transition: transform 0.14s ease, filter 0.14s ease;
}

.message:hover {
    transform: translateY(-1px);
}

.message .message-bubble {
    box-shadow: 0 6px 14px rgba(15, 23, 42, 0.06);
    border: 1px solid rgba(148, 163, 184, 0.18);
}

.message.staff .message-bubble {
    border-color: rgba(var(--v-accent-rgb), 0.26);
    box-shadow: 0 10px 22px rgba(var(--v-accent-rgb), 0.16);
}

.chat-input-wrap,
.chat-input-bar,
.chat-input-area {
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.chat-input-wrap textarea,
.chat-input-area textarea,
#messageInput {
    transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
    user-select: text !important;
    -webkit-user-select: text !important;
}

.chat-input-wrap textarea:focus,
.chat-input-area textarea:focus,
#messageInput:focus {
    border-color: rgba(var(--v-accent-rgb), 0.46);
    box-shadow: 0 0 0 3px rgba(var(--v-accent-rgb), 0.14);
    background: #fff;
}

.send-btn,
#sendBtn,
.tool-btn {
    transition: transform 0.14s ease, box-shadow 0.18s ease, filter 0.14s ease;
}

.send-btn:hover,
#sendBtn:hover,
.tool-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--v-btn-elev-hover);
}

.send-btn:active,
#sendBtn:active,
.tool-btn:active {
    transform: translateY(0) scale(0.98);
}

.send-btn[disabled],
#sendBtn[disabled] {
    opacity: 0.7;
    cursor: not-allowed;
    filter: grayscale(0.06);
}

.visitor-list-empty,
.chat-empty,
.visitor-empty-thread {
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(var(--v-accent-rgb), 0.04), rgba(var(--v-accent-rgb), 0.015));
}

.toast,
#toast {
    border-radius: 10px;
    box-shadow: 0 16px 34px rgba(15, 23, 42, 0.24);
}

@media (max-width: 768px) {
    .chat-container {
        max-width: 100%;
        border-left: 0;
        border-right: 0;
        box-shadow: none;
    }

    .chat-header {
        padding: 14px 14px 12px;
    }

    .chat-input-wrap,
    .chat-input-bar,
    .chat-input-area {
        padding-left: 10px;
        padding-right: 10px;
    }
}

.header-main {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    min-width: 0;
}

.header-actions {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 2px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: linear-gradient(145deg, var(--v-accent) 0%, var(--v-accent-end) 100%);
    color: #fff;
    box-shadow: 0 8px 20px rgba(var(--v-accent-rgb), 0.35);
}

.avatar svg {
    width: 26px;
    height: 26px;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 14px;
    display: block;
}

.header-info {
    flex: 1;
    min-width: 0;
}

.title-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 10px;
    margin-bottom: 4px;
}

.title {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--v-ink);
    line-height: 1.25;
}

.badge-verified {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: #b45309;
    background: #fffbeb;
    border: 1px solid #fde68a;
    padding: 3px 8px 3px 6px;
    border-radius: 999px;
    white-space: nowrap;
}

.badge-verified svg {
    color: #d97706;
    flex-shrink: 0;
}

.header-lead {
    font-size: 0.8125rem;
    color: var(--v-ink-muted);
    margin-bottom: 10px;
    line-height: 1.4;
}

.header-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 999px;
    border: 1px solid var(--v-border);
    background: #fff;
    color: var(--v-ink-muted);
}

.pill--live {
    color: #047857;
    background: #ecfdf5;
    border-color: #a7f3d0;
}

.pill-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--v-live);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
    animation: livePulse 2.2s ease-in-out infinite;
}

@keyframes livePulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.85; transform: scale(0.92); }
}

.pill--muted {
    font-weight: 500;
    color: var(--v-ink-muted);
    background: #f8fafc;
}

.header-refresh {
    width: 42px;
    height: 42px;
    border: 1px solid var(--v-border);
    border-radius: 12px;
    background: linear-gradient(180deg, #fff 0%, #f1f5f9 100%);
    color: var(--v-ink-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 0 0 1px rgba(255, 255, 255, 0.6) inset;
    transition: background 0.2s, color 0.2s, transform 0.15s, box-shadow 0.2s, border-color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.header-refresh:hover {
    background: linear-gradient(180deg, #fff 0%, #e8eef5 100%);
    border-color: #cbd5e1;
    color: var(--v-accent);
    box-shadow: 0 4px 14px rgba(var(--v-accent-rgb), 0.12);
}

.header-refresh:active {
    transform: scale(0.96);
}

.header-refresh:disabled {
    opacity: 0.55;
    cursor: wait;
    transform: none;
}

.header-refresh.is-loading svg {
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.tool-btn:focus-visible,
.send-btn:focus-visible,
.quick-action-btn:focus-visible,
.modal-btn:focus-visible,
.header-refresh:focus-visible,
.wechat-inapp-banner__btn:focus-visible {
    outline: 2px solid var(--v-accent);
    outline-offset: 2px;
}

.input-wrapper textarea:focus-visible {
    outline: none;
    border-color: var(--v-accent);
    box-shadow: 0 0 0 3px var(--v-accent-soft);
}

/* —— Messages area —— */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    scroll-behavior: smooth;
    background:
        linear-gradient(180deg, #f8fafc 0%, #fff 32%),
        repeating-linear-gradient(
            -12deg,
            transparent,
            transparent 40px,
            rgba(148, 163, 184, 0.04) 40px,
            rgba(148, 163, 184, 0.04) 41px
        );
    -webkit-overflow-scrolling: touch;
}

.chat-messages::-webkit-scrollbar {
    width: 5px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.35);
    border-radius: 4px;
}

.chat-load-older-bar {
    text-align: center;
    padding: 8px 0 12px;
}

.chat-load-older-btn {
    appearance: none;
    border: 1px solid rgba(148, 163, 184, 0.55);
    background: #fff;
    color: #475569;
    font-size: 13px;
    padding: 6px 16px;
    border-radius: 999px;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.chat-load-older-btn:hover:not(:disabled) {
    border-color: var(--v-accent);
    color: var(--v-accent);
}

.chat-load-older-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.welcome-container {
    padding: 20px 16px 24px;
    animation: fadeUp 0.45s ease;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 18px;
    background: var(--v-surface);
    border-radius: var(--v-radius);
    border: 1px solid var(--v-border);
    box-shadow: var(--v-shadow);
    margin-bottom: 14px;
}

.welcome-card__icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: linear-gradient(145deg, var(--v-accent-soft), #eef2ff);
    color: var(--v-accent);
}

.welcome-card__icon svg {
    width: 26px;
    height: 26px;
}

.welcome-card__title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--v-ink);
    letter-spacing: -0.02em;
    margin-bottom: 6px;
    line-height: 1.3;
}

.welcome-card__desc {
    font-size: 0.875rem;
    color: var(--v-ink-muted);
    line-height: 1.55;
}

.service-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: #f8fafc;
    border-radius: var(--v-radius-sm);
    font-size: 0.8125rem;
    color: var(--v-ink-muted);
    border: 1px solid var(--v-border);
    margin-bottom: 22px;
}

.service-bar svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--v-accent);
    opacity: 0.85;
}

.quick-actions-title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #94a3b8;
    margin-bottom: 12px;
}

.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 14px 16px;
    background: linear-gradient(165deg, #fff 0%, #f8fafc 100%);
    border: 1px solid var(--v-border);
    border-radius: var(--v-radius-sm);
    cursor: pointer;
    text-align: left;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s, background 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.quick-action-btn:hover {
    border-color: #a5b4fc;
    background: linear-gradient(165deg, #fff 0%, #f1f5ff 100%);
    box-shadow: 0 8px 24px rgba(var(--v-accent-rgb), 0.1), 0 0 0 1px rgba(var(--v-accent-rgb), 0.08);
    transform: translateY(-2px);
}

.quick-action-btn:active {
    transform: translateY(0);
}

.quick-action-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    color: var(--v-accent);
    transition: background 0.2s, color 0.2s;
}

.quick-action-btn:hover .quick-action-icon {
    background: var(--v-accent);
    color: #fff;
}

.quick-action-icon svg {
    width: 20px;
    height: 20px;
}

.quick-action-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--v-ink);
    line-height: 1.3;
}

/* —— Message bubbles —— */
.message {
    display: flex;
    margin: 0 14px 14px;
    position: relative;
    animation: msgIn 0.28s ease;
}

@keyframes msgIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.copy-btn {
    position: absolute;
    top: -6px;
    z-index: 2;
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.92) 100%);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 5px 11px;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    opacity: 0;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.25);
    transition: opacity 0.2s, transform 0.15s, background 0.2s;
}

.copy-btn:hover {
    background: linear-gradient(180deg, #334155 0%, #1e293b 100%);
    transform: translateY(-1px);
}

.message.visitor .copy-btn {
    right: 0;
}

.message.staff .copy-btn {
    left: 0;
}

.message.visitor {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 34px;
    height: 34px;
    background: #e2e8f0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message-avatar svg {
    width: 18px;
    height: 18px;
    color: #64748b;
}

.message.staff .message-avatar {
    background: linear-gradient(145deg, var(--v-accent), var(--v-accent-end));
    box-shadow: 0 4px 12px rgba(var(--v-accent-rgb), 0.3);
}

.message.staff .message-avatar svg {
    color: #fff;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    display: block;
}

.message-content {
    max-width: min(92%, 720px);
    margin: 0 10px;
}

.message-bubble {
    background: #fff;
    padding: 11px 14px;
    border-radius: 18px;
    font-size: 0.9375rem;
    line-height: 1.55;
    word-break: break-word;
    overflow-wrap: anywhere;
    border: 1px solid var(--v-border);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.message-bubble:hover {
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.06);
}

.message.visitor .message-bubble {
    background: linear-gradient(145deg, var(--v-accent) 0%, var(--v-accent-end) 100%);
    color: #fff;
    border: none;
    border-bottom-right-radius: 6px;
    box-shadow: 0 6px 18px rgba(var(--v-accent-rgb), 0.28);
}

.message.staff .message-bubble {
    border-bottom-left-radius: 6px;
    background: #fff;
}

.message.revoked .message-bubble {
    opacity: 0.65;
    background: #f1f5f9;
}

.message.visitor.revoked .message-bubble {
    background: linear-gradient(145deg, #94a3b8, #64748b);
    box-shadow: none;
}

.message-type-unknown {
    font-size: 0.8125rem;
    font-style: italic;
    color: rgba(255, 255, 255, 0.92);
}

.message.staff .message-type-unknown {
    color: var(--v-ink-muted);
}

.message-bubble img.message-inline-img {
    max-width: min(100%, 360px);
    border-radius: 12px;
}

.message-image-caption {
    margin-top: 8px;
    font-size: 0.875rem;
    line-height: 1.45;
    word-break: break-word;
}

.message-bubble video {
    max-width: min(100%, 360px);
    border-radius: 12px;
}

.file-attachment {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    background: rgba(15, 23, 42, 0.04);
    border-radius: 10px;
}

.message.visitor .file-attachment {
    background: rgba(255, 255, 255, 0.2);
}

.file-icon {
    width: 38px;
    height: 38px;
    background: var(--v-accent);
    color: #fff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.625rem;
    font-weight: 700;
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-size: 0.8125rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-time {
    font-size: 0.6875rem;
    color: #94a3b8;
    margin-top: 5px;
    text-align: right;
}

.message.staff .message-time {
    text-align: left;
}

.message.visitor .message-time {
    color: rgba(255, 255, 255, 0.8);
}

/* —— Composer —— */
.chat-input-area {
    flex-shrink: 0;
    background: var(--v-surface);
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom, 0));
    border-top: 1px solid var(--v-border);
    box-shadow: 0 -8px 24px rgba(15, 23, 42, 0.04);
}

.input-tools {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
}

.tool-btn {
    width: 40px;
    height: 40px;
    background: linear-gradient(180deg, #fff 0%, #f1f5f9 100%);
    border: 1px solid var(--v-border);
    border-radius: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--v-ink-muted);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    transition: background 0.2s, color 0.2s, transform 0.12s, border-color 0.2s, box-shadow 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.tool-btn svg {
    width: 18px;
    height: 18px;
}

.tool-btn:hover {
    background: linear-gradient(145deg, var(--v-accent-soft), #eef2ff);
    border-color: #c7d2fe;
    color: var(--v-accent);
    box-shadow: 0 4px 14px rgba(var(--v-accent-rgb), 0.12);
}

.tool-btn:active {
    transform: scale(0.94);
}

.tool-btn.emoji-btn {
    font-size: 1.125rem;
    line-height: 1;
}

.tool-btn-emoji {
    display: block;
    transform: translateY(1px);
}

.input-wrapper {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.input-wrapper textarea {
    flex: 1;
    min-height: 44px;
    max-height: 120px;
    padding: 11px 16px;
    border: 1px solid var(--v-border);
    border-radius: 22px;
    font-size: 0.9375rem;
    font-family: inherit;
    line-height: 1.45;
    resize: none;
    outline: none;
    background: #f8fafc;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.input-wrapper textarea::placeholder {
    color: #94a3b8;
}

.input-wrapper textarea:focus {
    background: #fff;
    border-color: var(--v-accent);
}

.send-btn {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    border: none;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--v-accent) 0%, var(--v-accent-end) 100%);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--v-btn-elev);
    transition: transform 0.15s, box-shadow 0.2s, filter 0.2s;
}

.send-btn svg {
    width: 20px;
    height: 20px;
    margin-left: 2px;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.12));
}

.send-btn:hover {
    filter: brightness(1.06);
    box-shadow: var(--v-btn-elev-hover);
}

.send-btn:active {
    transform: scale(0.93);
    filter: brightness(0.98);
}

.send-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

/* —— Modal & toast —— */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

.modal-content {
    background: var(--v-surface);
    border-radius: var(--v-radius);
    padding: 28px 24px;
    text-align: center;
    max-width: 320px;
    width: 100%;
    border: 1px solid var(--v-border);
    box-shadow: var(--v-shadow-lg);
    animation: modalIn 0.28s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.96) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-icon {
    font-size: 2.5rem;
    line-height: 1;
    margin-bottom: 12px;
}

.modal-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--v-ink);
    margin-bottom: 8px;
}

.modal-content p {
    font-size: 0.875rem;
    color: var(--v-ink-muted);
    margin-bottom: 22px;
    line-height: 1.55;
}

.modal-btn {
    width: 100%;
    padding: 13px 22px;
    border: none;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    background: linear-gradient(145deg, var(--v-accent) 0%, var(--v-accent-end) 100%);
    color: #fff;
    box-shadow: var(--v-btn-elev);
    transition: filter 0.2s, transform 0.15s, box-shadow 0.2s;
}

.modal-btn:hover {
    filter: brightness(1.05);
    box-shadow: var(--v-btn-elev-hover);
}

.modal-btn:active {
    transform: scale(0.98);
}

.modal-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 10px;
}

.modal-btn--auto {
    width: auto;
    min-width: 132px;
}

.modal-btn--secondary {
    background: linear-gradient(180deg, #fff 0%, #f1f5f9 100%);
    color: var(--v-ink);
    border: 1px solid var(--v-border);
    box-shadow: none;
}

.modal-btn--secondary:hover {
    filter: none;
    border-color: rgba(var(--v-accent-rgb), 0.35);
    color: var(--v-accent);
}

.toast {
    position: fixed;
    bottom: calc(96px + env(safe-area-inset-bottom, 0));
    left: 50%;
    transform: translateX(-50%);
    max-width: calc(100% - 32px);
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.96) 0%, rgba(15, 23, 42, 0.94) 100%);
    color: #fff;
    padding: 12px 22px;
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    z-index: 1001;
    display: none;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}

.emoji-picker {
    position: fixed;
    background: var(--v-surface);
    border-radius: var(--v-radius-sm);
    border: 1px solid var(--v-border);
    box-shadow: var(--v-shadow-lg);
    z-index: 1000;
    padding: 14px;
    width: min(300px, calc(100vw - 32px));
    max-height: 260px;
    overflow-y: auto;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
}

.emoji-item {
    width: 100%;
    aspect-ratio: 1;
    max-width: 32px;
    max-height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 8px;
    font-size: 1.125rem;
    transition: background 0.15s, transform 0.15s ease;
}

.emoji-item:hover {
    background: var(--v-accent-soft);
    transform: scale(1.08);
}

.emoji-item:active {
    transform: scale(0.96);
}

.chat-pending-image {
    margin: 0 12px 8px;
    padding: 10px 12px;
    background: var(--v-surface);
    border: 1px solid var(--v-border);
    border-radius: var(--v-radius-sm);
}

.chat-pending-image__row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.chat-pending-image__thumb {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--v-border);
    background: var(--v-bg-accent);
}

.chat-pending-image__meta {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-pending-image__hint {
    font-size: 0.75rem;
    line-height: 1.35;
    color: var(--v-ink-muted);
}

.chat-pending-image__name {
    font-size: 0.8125rem;
    color: var(--v-ink);
    word-break: break-all;
}

.chat-pending-image__cancel {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--v-ink-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.chat-pending-image__cancel:hover {
    background: var(--v-accent-soft);
    color: var(--v-accent);
}

.upload-status {
    margin: 0 12px 10px;
    padding: 10px 12px;
    border-radius: var(--v-radius-sm);
    background: rgba(79, 70, 229, 0.06);
    border: 1px solid rgba(79, 70, 229, 0.18);
}

.upload-status__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.upload-status__text {
    font-size: 0.8125rem;
    color: var(--v-ink);
    font-weight: 650;
}

.upload-status__retry {
    appearance: none;
    border: 1px solid var(--v-border);
    background: #fff;
    color: var(--v-ink);
    padding: 6px 10px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.75rem;
    cursor: pointer;
}

.upload-status__retry:hover {
    border-color: rgba(var(--v-accent-rgb), 0.45);
    color: var(--v-accent);
}

.upload-status__bar {
    height: 8px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.08);
    overflow: hidden;
}

.upload-status__bar-inner {
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--v-accent), var(--v-accent-end));
    transition: width 0.12s ease;
}

@media (min-width: 768px) {
    .chat-container {
        max-width: 420px;
        height: min(calc(var(--app-vh) * 0.9), 780px);
        margin: max(5vh, 20px) auto;
        border-radius: 24px;
        overflow: hidden;
    }

    .chat-header {
        border-radius: 24px 24px 0 0;
    }

    body {
        overflow: auto;
        min-height: var(--app-vh);
        height: auto;
    }

    .chat-container {
        max-height: 780px;
    }
}

@media (max-width: 380px) {
    .quick-actions-grid {
        grid-template-columns: 1fr;
    }

    .header-lead {
        font-size: 0.75rem;
    }

    .message-content {
        max-width: 80%;
    }
}

@media (prefers-color-scheme: dark) {
    html {
        color-scheme: dark;
    }

    :root {
        --v-bg: #0c0e14;
        --v-bg-accent: #12151e;
        --v-surface: #151821;
        --v-ink: #e8eaf0;
        --v-ink-muted: #8b95a8;
        --v-border: rgba(255, 255, 255, 0.1);
        --v-accent-rgb: 129, 140, 248;
        --v-accent: #818cf8;
        --v-accent-hover: #a5b4fc;
        --v-accent-soft: rgba(129, 140, 248, 0.2);
        --v-accent-end: #a78bfa;
        --v-live: #34d399;
        --v-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
        --v-shadow-lg: 0 24px 56px rgba(0, 0, 0, 0.58);
        --v-btn-elev: 0 4px 18px rgba(129, 140, 248, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
        --v-btn-elev-hover: 0 12px 36px rgba(129, 140, 248, 0.42), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
    }

    body {
        background:
            radial-gradient(1200px 600px at 8% -8%, rgba(var(--v-accent-rgb), 0.12), transparent 55%),
            radial-gradient(900px 500px at 100% 100%, rgba(52, 211, 153, 0.06), transparent 50%),
            linear-gradient(165deg, var(--v-bg) 0%, var(--v-bg-accent) 100%);
    }

    .chat-header {
        background: linear-gradient(180deg, rgba(24, 26, 34, 0.98) 0%, rgba(18, 20, 28, 0.96) 100%);
        border-bottom-color: var(--v-border);
    }

    .compliance-footer {
        background: rgba(255, 255, 255, 0.04);
        border-top-color: var(--v-border);
    }

    .chat-messages {
        background:
            linear-gradient(180deg, rgba(18, 20, 28, 0.98) 0%, rgba(12, 14, 20, 0.96) 32%),
            repeating-linear-gradient(
                -12deg,
                transparent,
                transparent 40px,
                rgba(255, 255, 255, 0.025) 40px,
                rgba(255, 255, 255, 0.025) 41px
            );
    }

    .chat-load-older-btn {
        background: rgba(30, 32, 40, 0.92);
        color: var(--v-ink-muted);
        border-color: var(--v-border);
    }

    .welcome-card__icon {
        background: linear-gradient(145deg, rgba(var(--v-accent-rgb), 0.22), rgba(28, 30, 40, 0.85));
        color: var(--v-accent);
    }

    .quick-action-btn {
        background: rgba(255, 255, 255, 0.04);
        border-color: var(--v-border);
    }

    .quick-action-btn:hover {
        border-color: rgba(var(--v-accent-rgb), 0.45);
        background: linear-gradient(165deg, rgba(30, 32, 40, 0.95) 0%, rgba(22, 24, 32, 0.9) 100%);
    }

    .message-avatar {
        background: rgba(255, 255, 255, 0.08);
    }

    .message-avatar svg {
        color: var(--v-ink-muted);
    }

    .message-bubble {
        background: rgba(28, 30, 40, 0.96);
        color: var(--v-ink);
        border-color: var(--v-border);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    }

    .message-bubble:hover {
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    }

    .message.staff .message-bubble {
        background: rgba(28, 30, 40, 0.96);
        color: var(--v-ink);
    }

    .message.revoked .message-bubble {
        background: rgba(255, 255, 255, 0.06);
        color: var(--v-ink-muted);
    }

    .chat-input-area {
        background: var(--v-surface);
        border-top-color: var(--v-border);
        box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.35);
    }

    .chat-pending-image {
        background: rgba(22, 24, 32, 0.92);
        border-color: var(--v-border);
    }

    .chat-pending-image__thumb {
        border-color: var(--v-border);
        background: rgba(0, 0, 0, 0.25);
    }

    .modal {
        background: rgba(0, 0, 0, 0.62);
    }

    .modal-content {
        box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
    }

    .input-wrapper textarea:focus {
        border-color: rgba(var(--v-accent-rgb), 0.55);
        box-shadow: 0 0 0 3px rgba(var(--v-accent-rgb), 0.2);
        background: rgba(255, 255, 255, 0.06);
    }

    .input-wrapper textarea,
    #messageInput {
        background: rgba(255, 255, 255, 0.04);
        color: var(--v-ink);
    }

    .input-wrapper textarea::placeholder,
    #messageInput::placeholder {
        color: var(--v-ink-muted);
        opacity: 0.95;
    }

    .input-wrapper textarea:focus,
    #messageInput:focus {
        background: rgba(255, 255, 255, 0.06);
    }

    .emoji-picker {
        box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
    }

    .service-bar {
        background: rgba(255, 255, 255, 0.04);
    }

    .pill {
        background: rgba(255, 255, 255, 0.04);
        color: var(--v-ink-muted);
        border-color: var(--v-border);
    }

    .pill--muted {
        background: rgba(255, 255, 255, 0.03);
    }

    .pill--live {
        color: rgba(52, 211, 153, 0.98);
        background: rgba(16, 185, 129, 0.10);
        border-color: rgba(167, 243, 208, 0.38);
    }

    .header-refresh {
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.03) 100%);
        border-color: var(--v-border);
        color: var(--v-ink-muted);
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
    }

    .header-refresh:hover {
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.04) 100%);
        border-color: rgba(148, 163, 184, 0.35);
        color: var(--v-accent);
        box-shadow: 0 4px 14px rgba(var(--v-accent-rgb), 0.12);
    }

    .tool-btn {
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
        color: var(--v-ink-muted);
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
    }

    .tool-btn:hover {
        background: linear-gradient(145deg, rgba(var(--v-accent-rgb), 0.22), rgba(var(--v-accent-rgb), 0.08));
        border-color: rgba(var(--v-accent-rgb), 0.45);
        color: var(--v-accent);
        box-shadow: 0 4px 14px rgba(var(--v-accent-rgb), 0.12);
    }

    .badge-verified {
        color: #fde68a;
        background: rgba(120, 53, 15, 0.45);
        border-color: rgba(251, 191, 36, 0.35);
    }

    .badge-verified svg {
        color: #fde68a;
    }
}

@media (prefers-reduced-motion: reduce) {
    .emoji-item:hover,
    .emoji-item:active {
        transform: none;
    }

    .chat-container,
    .header-refresh {
        transition-duration: 0.01ms !important;
    }

    .header-refresh.is-loading svg {
        animation: none;
    }
}

/* Mobile-first reinforcement for visitor homepage */
@media (max-width: 768px) {
    .chat-container {
        width: 100%;
        min-height: var(--app-vh);
        height: var(--app-vh);
        border-radius: 0;
    }

    .chat-header {
        padding: 10px 12px;
    }

    .header-main {
        gap: 10px;
    }

    .title {
        font-size: 1rem;
        line-height: 1.2;
    }

    .header-lead {
        font-size: 12px;
        line-height: 1.35;
    }

    .quick-actions-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .chat-messages {
        padding-bottom: 8px;
    }

    .message {
        margin: 0 10px 10px;
    }

    .message-content {
        max-width: 86%;
        margin: 0 8px;
    }

    .chat-input-area {
        position: relative;
        padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    }

    .input-tools {
        gap: 6px;
        margin-bottom: 6px;
    }

    .tool-btn {
        min-width: 34px;
        min-height: 34px;
    }

    .input-wrapper textarea {
        min-height: 40px;
        font-size: 16px;
    }
}

/* ===== Visitor UI micro polish (2026 refresh) ===== */
.chat-container {
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.welcome-card,
.service-bar,
.quick-action-btn,
.chat-pending-image,
.upload-status,
.modal-content {
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.09);
}

.chat-header {
    position: sticky;
    top: 0;
    z-index: 12;
    -webkit-backdrop-filter: blur(7px);
    backdrop-filter: blur(7px);
}

.message {
    will-change: transform;
}

.message-bubble a {
    color: inherit;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 2px;
}

.message.staff .message-bubble a {
    color: var(--v-accent);
}

.message-bubble pre,
.message-bubble code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.message-bubble code {
    font-size: 0.85em;
    background: rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 8px;
    padding: 1px 6px;
}

.tool-btn:focus-visible,
.send-btn:focus-visible,
.quick-action-btn:focus-visible,
.header-refresh:focus-visible {
    box-shadow: 0 0 0 3px rgba(var(--v-accent-rgb), 0.2);
}

.quick-action-btn .quick-action-label {
    word-break: break-word;
}

@media (max-width: 768px) {
    .chat-header {
        position: static;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }

    .welcome-card,
    .service-bar,
    .quick-action-btn,
    .chat-pending-image,
    .upload-status,
    .modal-content {
        box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
    }
}

/* ===== Final visitor finishing ===== */
:root {
    --v-motion-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
    --v-motion-fast: 0.15s;
    --v-motion-mid: 0.22s;
}

body {
    font-size: 14px;
    letter-spacing: 0.01em;
}

.title {
    letter-spacing: -0.02em;
}

.chat-header,
.welcome-card,
.service-bar,
.quick-action-btn,
.message,
.message-bubble,
.tool-btn,
.send-btn,
.modal-content {
    transition-timing-function: var(--v-motion-ease);
    transition-duration: var(--v-motion-mid);
}

.quick-actions-title {
    letter-spacing: 0.08em;
}

.message-bubble {
    line-height: 1.6;
}

.message-time {
    letter-spacing: 0.02em;
}

.chat-input-area {
    border-top: 1px solid rgba(148, 163, 184, 0.3);
}

/* Improve dark-mode hierarchy */
@media (prefers-color-scheme: dark) {
    .chat-container {
        border-color: rgba(148, 163, 184, 0.24);
    }

    .welcome-card,
    .service-bar,
    .quick-action-btn,
    .chat-pending-image,
    .upload-status,
    .modal-content {
        border-color: rgba(148, 163, 184, 0.22);
        box-shadow: 0 14px 34px rgba(0, 0, 0, 0.36);
    }

    .quick-action-icon {
        background: rgba(255, 255, 255, 0.06);
    }

    .message-bubble code {
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(148, 163, 184, 0.28);
    }
}

@media (prefers-reduced-motion: reduce) {
    .chat-header,
    .welcome-card,
    .service-bar,
    .quick-action-btn,
    .message,
    .message-bubble,
    .tool-btn,
    .send-btn,
    .modal-content {
        transition: none !important;
    }
}