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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* 登录页面 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.login-box {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.login-box > p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

#login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#login-form input {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-color);
    color: var(--text-primary);
    font-size: 1rem;
}

#login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

#login-form button {
    padding: 0.8rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

#login-form button:hover {
    background: var(--primary-dark);
}

.error {
    color: var(--danger-color);
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* 主界面 */
#main-page {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: var(--bg-secondary);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.logo h2 {
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-menu li {
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.nav-menu li:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.nav-menu li.active {
    background: var(--primary-color);
    color: white;
}

.user-info {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-info span {
    color: var(--text-secondary);
}

#logout-btn {
    padding: 0.5rem 1rem;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
}

.content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.section h1 {
    margin-bottom: 2rem;
    font-size: 2rem;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.stat-card h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
}

/* 表格 */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    overflow: hidden;
}

thead {
    background: var(--bg-color);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

tr:hover {
    background: var(--bg-color);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge.banned {
    background: var(--danger-color);
    color: white;
}

.badge.active {
    background: var(--success-color);
    color: white;
}

/* 聊天界面 */
.chat-container {
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 2rem;
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    max-width: 70%;
    padding: 1rem;
    border-radius: 1rem;
    animation: fadeIn 0.3s;
}

.message.user {
    align-self: flex-end;
    background: var(--primary-color);
    color: white;
}

.message.assistant {
    align-self: flex-start;
    background: var(--bg-color);
    color: var(--text-primary);
}

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

.chat-input {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

#chat-input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    resize: none;
    height: 50px;
}

#send-btn {
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
}

#send-btn:hover {
    background: var(--primary-dark);
}

/* 控制按钮 */
.attack-controls,
.user-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

button {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: var(--primary-dark);
}

select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* 历史对话 */
.chat-history {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.5rem;
}

.chat-history h2 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

#history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.history-item {
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 0.25rem;
    cursor: pointer;
    transition: background 0.2s;
}

.history-item:hover {
    background: var(--border-color);
}

.history-item-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.history-item-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }

    .content {
        padding: 1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .chat-input {
        flex-direction: column;
    }

    #send-btn {
        width: 100%;
    }
}