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

:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d2e;
    --bg-card: #1e2235;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0b0;
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --accent-glow: rgba(245, 158, 11, 0.3);
    --danger: #ef4444;
    --success: #22c55e;
    --info: #3b82f6;
    --border: #2a2f45;
    --radius: 12px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* 悬浮球样式 */
.floating-ball {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, #f97316 100%);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px var(--accent-glow);
    transition: all 0.3s ease;
    z-index: 9999;
    animation: float 3s ease-in-out infinite;
}

.floating-ball:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px var(--accent-glow);
}

.floating-ball:active {
    transform: scale(0.95);
}

.ball-icon {
    font-size: 28px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.ball-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.4; }
    100% { transform: scale(1.8); opacity: 0; }
}

/* 聊天窗口样式 */
.chat-window {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 400px;
    height: 600px;
    max-height: calc(100vh - 150px);
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 9998;
    transition: all 0.3s ease;
}

/* 全屏模式 */
.chat-window.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
    border: none;
    bottom: 0;
    right: 0;
}

.chat-window.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.chat-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 16px;
}

.chat-icon {
    font-size: 24px;
}

.chat-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 8px;
    transition: background 0.2s;
}

.action-btn:hover {
    background: var(--bg-secondary);
}

/* 消息区域 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.chat-messages::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-width: 85%;
    animation: messageIn 0.3s ease;
}

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

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

.message.assistant {
    align-self: flex-start;
}

.message.system {
    align-self: center;
    max-width: 95%;
}

.message-content {
    padding: 12px 16px;
    border-radius: var(--radius);
    line-height: 1.5;
    word-wrap: break-word;
}

.message.user .message-content {
    background: var(--accent);
    color: #000;
    border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

.message.system .message-content {
    background: var(--info);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(147, 51, 234, 0.2) 100%);
    border: 1px solid rgba(59, 130, 246, 0.3);
    text-align: center;
    font-size: 14px;
}

/* 输入区域 */
.chat-input-area {
    padding: 16px 20px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

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

#chat-input {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 16px;
    resize: none;
    max-height: 120px;
    outline: none;
    transition: border-color 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

#chat-input:focus {
    border-color: var(--accent);
}

#chat-input::placeholder {
    color: var(--text-secondary);
}

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.send-btn:disabled {
    background: var(--border);
    cursor: not-allowed;
    transform: none;
}

.send-icon {
    font-size: 18px;
}

.input-hint {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 8px;
    text-align: center;
}

/* 加载动画 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    border-bottom-left-radius: 4px;
    width: fit-content;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* 响应式 */
@media (max-width: 480px) {
    .chat-window {
        width: calc(100% - 20px);
        right: 10px;
        bottom: 80px;
        height: calc(100vh - 100px);
    }
    
    .floating-ball {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
    
    .ball-icon {
        font-size: 24px;
    }
}

/* 代码块样式 */
.message-content code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
}

.message-content pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
}

.message-content pre code {
    background: none;
    padding: 0;
}

/* 文件列表样式 */
.file-list {
    margin-top: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
}

.file-item:last-child {
    border-bottom: none;
}

.file-icon {
    font-size: 16px;
}

.file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    color: var(--text-secondary);
    font-size: 12px;
}