/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --secondary-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 1rem;
    color: var(--text-primary);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    height: calc(100vh - 2rem);
    overflow: hidden;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    border-radius: 1.5rem 1.5rem 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--success-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-dot.processing {
    background: var(--warning-color);
    animation: blink 0.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.status-text {
    font-size: 0.875rem;
    font-weight: 500;
}

/* 配置面板 */
.config-panel {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.config-header {
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    user-select: none;
    transition: background 0.2s;
}

.config-header:hover {
    background: rgba(0, 0, 0, 0.02);
}

.toggle-icon {
    transition: transform 0.3s;
    color: var(--text-secondary);
}

.toggle-icon.rotated {
    transform: rotate(-180deg);
}

.config-content {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.config-content.expanded {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.form-group small.warning {
    color: var(--warning-color);
}

.save-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.save-btn:hover {
    background: #4338ca;
}

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

/* 对话容器 */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-container::-webkit-scrollbar {
    width: 0.5rem;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 1rem;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* 欢迎消息 */
.welcome-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.welcome-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.welcome-message h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* 消息气泡 */
.message {
    display: flex;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, #10b981, #06b6d4);
}

.message-content {
    max-width: 70%;
    padding: 1rem 1.25rem;
    border-radius: 1rem;
    line-height: 1.6;
    word-wrap: break-word;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-bottom-right-radius: 0.25rem;
}

.message.assistant .message-content {
    background: var(--bg-color);
    color: var(--text-primary);
    border-bottom-left-radius: 0.25rem;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    text-align: right;
}

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

/* 输入区域 */
.input-container {
    padding: 1.5rem;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.75rem;
    flex-shrink: 0;
}

#userInput {
    flex: 1;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    max-height: 150px;
    transition: border-color 0.2s;
}

#userInput:focus {
    outline: none;
    border-color: var(--primary-color);
}

.send-btn {
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}

.send-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* 加载动画 */
.typing-indicator {
    display: flex;
    gap: 0.25rem;
    padding: 0.5rem;
}

.typing-dot {
    width: 0.5rem;
    height: 0.5rem;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s 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: 0.7;
    }
    30% {
        transform: translateY(-0.5rem);
        opacity: 1;
    }
}

/* 底部 */
.footer {
    padding: 1rem;
    text-align: center;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.footer-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* 移动端适配 */
@media (max-width: 768px) {
    body {
        padding: 0;
    }

    .container {
        border-radius: 0;
        height: 100vh;
    }

    .header {
        border-radius: 0;
        padding: 1rem;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .status-indicator {
        padding: 0.375rem 0.75rem;
    }

    .message-content {
        max-width: 85%;
    }

    .send-text {
        display: none;
    }

    .send-btn {
        padding: 0.875rem;
    }

    .input-container {
        padding: 1rem;
    }

    .chat-container {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1rem;
    }

    .status-indicator {
        font-size: 0.75rem;
    }

    .message-content {
        max-width: 90%;
        padding: 0.75rem 1rem;
    }
}

/* 深色模式支持（可选） */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1e293b;
        --card-bg: #0f172a;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --border-color: #334155;
    }

    body {
        background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    }

    .message.assistant .message-content {
        background: #1e293b;
    }
}