/* chat.css - 聊天室简洁风格 */
:root {
    --chat-bg: linear-gradient(180deg, #f7f9fc 0%, #eef3f8 100%);
    --chat-surface: rgba(255, 255, 255, 0.92);
    --chat-border: rgba(15, 23, 42, 0.08);
    --chat-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --chat-shadow-soft: 0 4px 16px rgba(15, 23, 42, 0.06);
    --chat-safe-top: env(safe-area-inset-top, 0px);
    --chat-safe-right: env(safe-area-inset-right, 0px);
    --chat-safe-bottom: env(safe-area-inset-bottom, 0px);
    --chat-safe-left: env(safe-area-inset-left, 0px);
}

body, html {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background: transparent;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.chat-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    background: var(--chat-bg);
    border: 1px solid var(--chat-border);
    box-sizing: border-box;
    overflow: hidden;
}

.chat-header {
    padding: calc(12px + var(--chat-safe-top)) calc(18px + var(--chat-safe-right)) 12px calc(18px + var(--chat-safe-left));
    background: var(--chat-surface);
    border-bottom: 1px solid rgba(148, 163, 184, 0.22);
    box-shadow: 0 1px 0 rgba(255,255,255,0.7), var(--chat-shadow-soft);
    backdrop-filter: blur(16px);
    z-index: 10;
}

.chat-header h5 {
    font-weight: 600;
    letter-spacing: 0.2px;
}

.chat-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 14px calc(18px + var(--chat-safe-right)) calc(18px + var(--chat-safe-bottom)) calc(18px + var(--chat-safe-left));
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: linear-gradient(180deg, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0.08) 100%);
}

.loading-state {
    text-align: center;
    font-size: 0.9em;
    padding: 10px;
}

.message-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    max-width: min(85%, 720px);
}

.message-item.self {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-item.other {
    align-self: flex-start;
}

.avatar-wrapper {
    flex-shrink: 0;
}

.avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(255,255,255,0.75);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.12);
    background: #fff;
}

.message-content-wrapper {
    display: flex;
    flex-direction: column;
    max-width: 100%;
}

.message-item.self .message-content-wrapper {
    align-items: flex-end;
}

.message-item.other .message-content-wrapper {
    align-items: flex-start;
}

.username {
    font-size: 0.74em;
    line-height: 1.1;
    color: #64748b;
    margin-bottom: 2px;
    margin-left: 2px;
    margin-right: 2px;
}

.message-bubble {
    padding: 7px 12px;
    border-radius: 14px;
    font-size: 0.94em;
    line-height: 1.32;
    word-break: break-word;
    overflow-wrap: anywhere;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.055);
    border: 1px solid rgba(148, 163, 184, 0.08);
}

.message-item.other .message-bubble {
    background: rgba(255, 255, 255, 0.94);
    color: #1f2937;
    border-top-left-radius: 4px;
}

.message-item.self .message-bubble {
    background: linear-gradient(135deg, #1d7dfa 0%, #0f62d6 100%);
    color: #fff;
    border-top-right-radius: 4px;
}

.message-time {
    font-size: 0.66em;
    line-height: 1;
    color: #94a3b8;
    margin-top: 3px;
    margin-left: 2px;
    margin-right: 2px;
}

.chat-input-area {
    padding: 12px calc(16px + var(--chat-safe-right)) calc(12px + var(--chat-safe-bottom)) calc(16px + var(--chat-safe-left));
    background: rgba(255, 255, 255, 0.9);
    border-top: 1px solid rgba(148, 163, 184, 0.22);
    display: flex;
    gap: 10px;
    align-items: flex-end;
    box-shadow: 0 -10px 24px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(16px);
}

#messageInput {
    flex: 1;
    min-width: 0;
    resize: none;
    max-height: 100px;
    overflow-y: auto;
    border-radius: 14px;
    border: 1px solid rgba(148, 163, 184, 0.24);
    padding: 10px 14px;
    box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
}

#messageInput:focus {
    border-color: rgba(29, 125, 250, 0.45);
    box-shadow: 0 0 0 3px rgba(29, 125, 250, 0.12);
}

#sendBtn {
    border-radius: 14px;
    padding: 8px 18px;
    min-width: 72px;
    height: 42px;
    flex-shrink: 0;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(13, 110, 253, 0.2);
}


.markdown-body > :first-child {
    margin-top: 0;
}

.markdown-body > :last-child {
    margin-bottom: 0;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body pre,
.markdown-body blockquote,
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    margin: 0 0 0.45em;
}

.markdown-body p:only-child {
    margin-bottom: 0;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 1.2em;
}

.markdown-body code {
    padding: 0.15em 0.45em;
    border-radius: 6px;
    background: rgba(15, 23, 42, 0.08);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.92em;
}

.markdown-body pre {
    overflow-x: auto;
    padding: 0.85em 1em;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.9);
    color: #e2e8f0;
}

.markdown-body pre code {
    padding: 0;
    background: transparent;
    color: inherit;
}

.markdown-body blockquote {
    padding-left: 0.9em;
    border-left: 3px solid rgba(148, 163, 184, 0.65);
    color: #475569;
}

.message-item.self .markdown-body a,
.message-item.self .markdown-body code {
    color: inherit;
}

.markdown-body a {
    color: #0d6efd;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background-color: #cbd5e1;
    border-radius: 10px;
}

/* Toast 错误提示 */
.error-toast {
    position: fixed;
    bottom: calc(var(--chat-safe-bottom) + 88px);
    left: 50%;
    transform: translateX(-50%);
    background-color: #dc3545;
    color: #fff;
    padding: 10px 20px;
    border-radius: 999px;
    font-size: 0.9em;
    z-index: 9999;
    animation: toastFadeIn 0.3s ease;
    box-shadow: 0 12px 24px rgba(220, 53, 69, 0.28);
    max-width: min(92vw, 420px);
    text-align: center;
}

@keyframes toastFadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* 连接状态 */
.connection-status {
    text-align: center;
    padding: 8px;
    font-size: 0.85em;
    color: #6c757d;
    background-color: #fff3cd;
    border-bottom: 1px solid #ffc107;
}

.connection-status.disconnected {
    color: #856404;
    background-color: #fff3cd;
}

/* 手机端适配调整 */
@media (max-width: 576px) {
    .chat-header {
        padding: calc(10px + var(--chat-safe-top)) calc(14px + var(--chat-safe-right)) 10px calc(14px + var(--chat-safe-left));
    }
    .chat-messages {
        padding: 12px calc(10px + var(--chat-safe-right)) calc(16px + var(--chat-safe-bottom)) calc(10px + var(--chat-safe-left));
        gap: 9px;
    }
    .chat-input-area {
        padding: 10px calc(12px + var(--chat-safe-right)) calc(10px + var(--chat-safe-bottom)) calc(12px + var(--chat-safe-left));
        gap: 8px;
    }
    .message-item {
        max-width: 96%;
        gap: 8px;
    }
    .avatar {
        width: 30px;
        height: 30px;
    }
    #sendBtn {
        min-width: 64px;
        padding: 6px 14px;
        font-size: 0.9em;
        height: 40px;
    }
    .message-bubble {
        padding: 6px 10px;
        font-size: 0.9em;
        line-height: 1.3;
    }
    .error-toast {
        bottom: calc(var(--chat-safe-bottom) + 84px);
        font-size: 0.85em;
        padding: 10px 16px;
    }
}

@media (max-width: 380px) {
    .chat-input-area {
        gap: 6px;
    }

    #messageInput {
        padding: 9px 12px;
        border-radius: 12px;
    }

    #sendBtn {
        min-width: 58px;
        padding: 6px 12px;
    }
}