/* ============================================
   Forge — 多方思辨讨论面板
   ============================================ */

/* === 设计变量 === */
:root {
  --bg: #0a0a0b;
  --surface: #141416;
  --surface-2: #1c1c1f;
  --user: #d4a853;
  --user-bg: rgba(212, 168, 83, 0.08);
  --user-border: rgba(212, 168, 83, 0.15);
  --ai-1: #64b5f6;
  --ai-1-bg: rgba(100, 181, 246, 0.08);
  --ai-1-border: rgba(100, 181, 246, 0.15);
  --ai-2: #81c784;
  --ai-2-bg: rgba(129, 199, 132, 0.08);
  --ai-2-border: rgba(129, 199, 132, 0.15);
  --system: #9e9e9e;
  --system-bg: rgba(158, 158, 158, 0.06);
  --text-primary: #f0ece4;
  --text-secondary: #9e9e9e;
  --text-muted: #616161;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.04);
  --font-display: 'Cormorant Garamond', 'Noto Sans SC', serif;
  --font-body: 'DM Mono', 'Noto Sans SC', monospace;
}

/* === 基础重置 === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* ============================================
   登录界面
   ============================================ */

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-overlay.hidden {
  display: none;
}

.login-card {
  width: 320px;
  padding: 60px 40px;
  text-align: center;
  animation: slideUp 0.5s ease forwards;
}

.login-card h1 {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 48px;
  letter-spacing: 0.3em;
}

.login-input-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
}

.login-input-group:focus-within {
  border-color: var(--user);
}

.login-input-group input {
  flex: 1;
  padding: 14px 18px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
}

.login-input-group input::placeholder {
  color: var(--text-muted);
}

.login-input-group button {
  padding: 14px 24px;
  background: var(--user);
  border: none;
  color: var(--bg);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.login-input-group button:hover {
  background: #e8c547;
}

.login-error {
  margin-top: 16px;
  font-size: 12px;
  color: #ef5350;
  min-height: 18px;
}

/* ============================================
   主界面布局
   ============================================ */

.app {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 900px;
  margin: 0 auto;
  z-index: 1;
}

/* ============================================
   顶部栏
   ============================================ */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}

.header-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.header-btn:hover {
  border-color: var(--user);
  color: var(--text-primary);
}

.header-btn svg {
  width: 14px;
  height: 14px;
}

.header-center {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--text-primary);
}

.header-divider {
  color: var(--border);
}

.topic-text {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

/* ============================================
   历史记录侧边栏
   ============================================ */

.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  background: var(--surface);
  border-left: 1px solid var(--border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-header h2 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 0.1em;
}

.sidebar-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sidebar-close:hover {
  border-color: var(--user);
  color: var(--text-primary);
}

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.sidebar-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 13px;
}

.history-item {
  padding: 14px 16px;
  border: 1px solid var(--border-light);
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.history-item:hover {
  border-color: var(--user);
  background: var(--surface-2);
}

.history-item-topic {
  font-size: 13px;
  color: var(--text-primary);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-item-time {
  font-size: 11px;
  color: var(--text-muted);
}

/* ============================================
   消息区域
   ============================================ */

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.messages::-webkit-scrollbar-track {
  background: transparent;
}

.messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

/* 欢迎界面 */
.welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  gap: 20px;
}

.welcome.hidden {
  display: none;
}

.welcome-icon {
  width: 80px;
  height: 80px;
  color: var(--text-muted);
  opacity: 0.6;
}

.welcome h2 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--text-primary);
}

.welcome p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 消息气泡 */
.message {
  display: flex;
  gap: 12px;
  max-width: 85%;
  animation: fadeUp 0.3s ease forwards;
}

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

.message.system {
  max-width: 100%;
  justify-content: center;
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
  align-self: flex-start;
}

.message.user .message-avatar {
  background: var(--user-bg);
  border: 1px solid var(--user-border);
  color: var(--user);
}

.message.assistant .message-avatar {
  background: var(--ai-1-bg);
  border: 1px solid var(--ai-1-border);
  color: var(--ai-1);
}

.message.assistant[data-ai="deepseek"] .message-avatar {
  background: var(--ai-2-bg);
  border: 1px solid var(--ai-2-border);
  color: var(--ai-2);
}

.message-content {
  min-width: 0;
}

.message-sender {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}

.message.user .message-sender {
  text-align: right;
}

.message-bubble {
  padding: 14px 18px;
  line-height: 1.7;
  word-break: break-word;
}

.message.user .message-bubble {
  background: var(--user-bg);
  border: 1px solid var(--user-border);
}

.message.assistant .message-bubble {
  background: var(--ai-1-bg);
  border: 1px solid var(--ai-1-border);
}

.message.assistant[data-ai="deepseek"] .message-bubble {
  background: var(--ai-2-bg);
  border: 1px solid var(--ai-2-border);
}

.message.system .message-bubble {
  background: var(--system-bg);
  border: 1px solid var(--border);
  color: var(--system);
  font-size: 12px;
  text-align: center;
  max-width: 600px;
  padding: 10px 20px;
}

/* Markdown 格式 */
.message-bubble h1, .message-bubble h2, .message-bubble h3 {
  font-family: var(--font-display);
  font-weight: 600;
  margin-top: 16px;
  margin-bottom: 8px;
}

.message-bubble h1 { font-size: 18px; }
.message-bubble h2 { font-size: 16px; }
.message-bubble h3 { font-size: 14px; }

.message-bubble p {
  margin-bottom: 10px;
}

.message-bubble p:last-child {
  margin-bottom: 0;
}

.message-bubble ul, .message-bubble ol {
  margin: 10px 0;
  padding-left: 20px;
}

.message-bubble li {
  margin-bottom: 4px;
}

.message-bubble strong {
  color: var(--text-primary);
  font-weight: 500;
}

.message-bubble code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  font-size: 12px;
}

.message-bubble pre {
  background: rgba(0, 0, 0, 0.3);
  padding: 14px;
  margin: 10px 0;
  overflow-x: auto;
}

.message-bubble pre code {
  background: transparent;
  padding: 0;
}

.message-bubble blockquote {
  border-left: 3px solid var(--border);
  padding-left: 12px;
  margin: 10px 0;
  color: var(--text-secondary);
}

/* 光标动画 */
.cursor {
  display: inline-block;
  width: 2px;
  height: 16px;
  background: var(--ai-1);
  vertical-align: middle;
  animation: blink 0.8s ease infinite;
}

.cursor.deepseek {
  background: var(--ai-2);
}

/* ============================================
   底部输入栏
   ============================================ */

.input-bar {
  flex-shrink: 0;
  padding: 16px 24px 20px;
  border-top: 1px solid var(--border-light);
  background: var(--bg);
}

.ai-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.ai-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ai-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.ai-btn.selected {
  border-color: var(--user);
  color: var(--user);
}

.ai-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.ai-dot.ai-kimi {
  background: var(--ai-1);
}

.ai-dot.ai-deepseek {
  background: var(--ai-2);
}

.input-row {
  display: flex;
  gap: 8px;
}

.message-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.5;
  resize: none;
  outline: none;
  max-height: 120px;
  transition: border-color 0.2s ease;
}

.message-input:focus {
  border-color: var(--user);
}

.message-input::placeholder {
  color: var(--text-muted);
}

.send-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--user);
  border: none;
  color: var(--bg);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.send-btn:hover {
  background: #e8c547;
}

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

.action-bar {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  border-color: var(--user);
  color: var(--text-primary);
}

.action-btn svg {
  width: 14px;
  height: 14px;
}

.summary-btn {
  margin-left: auto;
}

.summary-btn:hover {
  border-color: var(--user);
  background: var(--user-bg);
  color: var(--user);
}

/* ============================================
   响应式
   ============================================ */

@media (max-width: 640px) {
  .header {
    padding: 12px 16px;
  }
  .header-btn span {
    display: none;
  }
  .topic-text {
    max-width: 120px;
  }
  .messages {
    padding: 16px;
  }
  .message {
    max-width: 95%;
  }
  .input-bar {
    padding: 12px 16px 16px;
  }
  .ai-btn {
    padding: 8px 12px;
    font-size: 11px;
  }
}
/* 历史记录删除按钮 */
.history-item {
  position: relative;
  padding-right: 36px;
}

.history-delete {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.2s ease;
}

.history-item:hover .history-delete {
  opacity: 1;
}

.history-delete:hover {
  color: #ef5350;
}
/* @标签样式 */
.at-tag {
  color: var(--user);
  font-weight: 500;
  margin-right: 4px;
}