diff --git a/frontend/ftchat/style.css b/frontend/ftchat/style.css
index c698b74..18a5ef0 100644
--- a/frontend/ftchat/style.css
+++ b/frontend/ftchat/style.css
@@ -1,435 +1,350 @@
-/* ═══════════════════════════════════════════════════════════
- * 光湖 · 微调模型内测 · 样式
- * 暗色 (星空) ↔ 亮色 (晨光) 双主题
- * 守护: 铸渊 · ICE-GL-ZY001
- * 版权: 国作登字-2026-A-00037559
- * ═══════════════════════════════════════════════════════════ */
+/* 光湖 · 内测站 · 极简深色主题 */
+/* 不使用任何模板/CSS框架 */
 
 :root {
-  --color-accent: #7e8ce0;
-  --color-accent-hover: #9aa7f0;
-  --color-danger: #e07a8c;
-  --radius-md: 10px;
-  --radius-lg: 14px;
-  --transition: 0.2s ease;
-  --max-content: 760px;
+  --bg-primary: #0a0a12;
+  --bg-secondary: #12121e;
+  --bg-tertiary: #1a1a2e;
+  --bg-hover: #242442;
+  --text-primary: #e8e8f0;
+  --text-secondary: #9898b0;
+  --text-muted: #58587a;
+  --accent: #6c5ce7;
+  --accent-dim: #4a3db8;
+  --accent-glow: rgba(108, 92, 231, 0.15);
+  --border: #2a2a44;
+  --danger: #e74c3c;
+  --success: #2ecc71;
+  --radius: 10px;
+  --radius-sm: 6px;
 }
 
-/* 暗色主题 (默认) */
-[data-theme="dark"] {
-  --bg-base: #0a0e27;
-  --bg-elev: #141936;
-  --bg-elev-2: #1d2447;
-  --bg-input: rgba(255, 255, 255, 0.06);
-  --text-primary: #f4f5fb;
-  --text-secondary: #c4cad8;
-  --text-muted: #9097ad;
-  --border: rgba(255, 255, 255, 0.08);
-  --border-strong: rgba(255, 255, 255, 0.16);
-  --bubble-user: linear-gradient(135deg, #4a5cb8 0%, #6b7dd0 100%);
-  --bubble-user-text: #ffffff;
-  --bubble-persona: rgba(255, 255, 255, 0.06);
-  --bubble-persona-text: #f4f5fb;
-  --bubble-system: rgba(126, 140, 224, 0.14);
-  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
-  --code-bg: rgba(0, 0, 0, 0.35);
-}
+* { margin: 0; padding: 0; box-sizing: border-box; }
 
-/* 亮色主题 */
-[data-theme="light"] {
-  --bg-base: #f5f7fc;
-  --bg-elev: #ffffff;
-  --bg-elev-2: #f0f3fa;
-  --bg-input: rgba(0, 0, 0, 0.04);
-  --text-primary: #14172a;
-  --text-secondary: #363c52;
-  --text-muted: #5a6378;
-  --border: rgba(0, 0, 0, 0.08);
-  --border-strong: rgba(0, 0, 0, 0.16);
-  --bubble-user: linear-gradient(135deg, #5b6dd1 0%, #7e8ce0 100%);
-  --bubble-user-text: #ffffff;
-  --bubble-persona: #ffffff;
-  --bubble-persona-text: #14172a;
-  --bubble-system: rgba(126, 140, 224, 0.1);
-  --shadow-card: 0 4px 20px rgba(20, 25, 54, 0.08);
-  --code-bg: rgba(0, 0, 0, 0.05);
-}
-
-/* ─── 基础 ─── */
-* { box-sizing: border-box; }
-html, body {
-  margin: 0; padding: 0; height: 100%; width: 100%;
-  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
-  font-size: 15px;
-  line-height: 1.6;
-  background: var(--bg-base);
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+  background: var(--bg-primary);
   color: var(--text-primary);
-  transition: background var(--transition), color var(--transition);
+  min-height: 100vh;
   overflow: hidden;
-  -webkit-font-smoothing: antialiased;
-  text-rendering: optimizeLegibility;
 }
-button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
-input, textarea { font-family: inherit; font-size: inherit; color: inherit; }
 
 #starfield {
-  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
-  z-index: 0; pointer-events: none;
-}
-
-/* ─── 主题切换按钮 ─── */
-.theme-toggle {
-  position: fixed; top: env(safe-area-inset-top, 16px); right: 16px; z-index: 100;
-  width: 40px; height: 40px; border-radius: 50%;
-  background: var(--bg-elev); border: 1px solid var(--border);
-  font-size: 18px; box-shadow: var(--shadow-card);
-  display: flex; align-items: center; justify-content: center;
-}
-.theme-toggle:hover { background: var(--bg-elev-2); }
-[data-theme="dark"] .theme-icon-light,
-[data-theme="light"] .theme-icon-dark { display: none; }
-
-/* ─── 登录屏 ─── */
-.login-screen {
-  position: relative; z-index: 1;
+  position: fixed;
+  top: 0; left: 0;
   width: 100%; height: 100%;
-  display: flex; align-items: center; justify-content: center;
-  padding: 24px;
-}
-/* 让 HTML hidden 属性在 .login-screen / .chat-screen 上生效
-   （否则 .xxx-screen 的 display:flex 会覆盖 UA 的 [hidden]{display:none}） */
-.login-screen[hidden],
-.chat-screen[hidden] { display: none; }
-.login-card {
-  width: 100%; max-width: 440px;
-  background: var(--bg-elev); border: 1px solid var(--border);
-  border-radius: var(--radius-lg); padding: 40px 32px;
-  box-shadow: var(--shadow-card);
-  backdrop-filter: blur(8px);
-}
-.login-header { text-align: center; margin-bottom: 24px; }
-.login-logo {
-  font-size: 40px; line-height: 1;
-  background: linear-gradient(135deg, #7e8ce0, #b8c1ee);
-  -webkit-background-clip: text; background-clip: text; color: transparent;
-  margin-bottom: 12px;
-}
-.login-title { margin: 0 0 8px; font-size: 22px; font-weight: 600; }
-.login-subtitle { margin: 0; color: var(--text-secondary); font-size: 13px; }
-.slots-banner {
-  margin-bottom: 24px; padding: 10px 14px;
-  background: var(--bubble-system); border-radius: var(--radius-md);
-  font-size: 13px; color: var(--text-secondary); text-align: center;
-}
-.login-form { display: flex; flex-direction: column; gap: 12px; }
-.login-label { font-size: 13px; color: var(--text-secondary); margin-top: 8px; }
-.login-input {
-  width: 100%; padding: 12px 14px;
-  background: var(--bg-input); border: 1px solid var(--border);
-  border-radius: var(--radius-md);
-  outline: none; transition: border-color var(--transition);
-}
-.login-input:focus { border-color: var(--color-accent); }
-.btn-primary, .btn-secondary {
-  width: 100%; padding: 12px 16px;
-  border-radius: var(--radius-md);
-  font-weight: 500; font-size: 15px;
-  transition: all var(--transition);
-}
-.btn-primary {
-  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
-  color: #ffffff;
-}
-.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(126, 140, 224, 0.3); }
-.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
-.btn-secondary {
-  background: var(--bg-input); border: 1px solid var(--border-strong);
-}
-.btn-secondary:hover:not(:disabled) { background: var(--bg-elev-2); }
-.btn-secondary:disabled { opacity: 0.5; cursor: not-allowed; }
-.login-msg {
-  margin: 16px 0 0; min-height: 20px; font-size: 13px; text-align: center;
-  color: var(--color-danger);
-}
-.login-msg.success { color: var(--color-accent); }
-.login-footer {
-  margin: 24px 0 0; text-align: center;
-  font-size: 11px; color: var(--text-muted); line-height: 1.6;
+  z-index: 0;
+  pointer-events: none;
 }
 
-/* ─── 聊天屏 ─── */
-.chat-screen {
-  position: relative; z-index: 1;
-  width: 100%; height: 100%;
-  display: flex;
-}
-.sidebar-overlay {
+.screen {
   display: none;
-  position: fixed; inset: 0; z-index: 9;
-  background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(2px);
+  position: relative;
+  z-index: 1;
+  width: 100%;
+  height: 100vh;
 }
-.sidebar-overlay.show { display: block; }
+.screen.active { display: flex; }
 
-.sidebar {
-  width: 260px; flex-shrink: 0;
-  background: var(--bg-elev); border-right: 1px solid var(--border);
-  display: flex; flex-direction: column;
-  padding: 16px 12px;
-  padding-top: max(16px, env(safe-area-inset-top));
-}
-.sidebar-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
-.btn-new-chat {
-  flex: 1; padding: 10px 14px;
-  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
-  color: #ffffff; border-radius: var(--radius-md); font-weight: 500;
-  transition: all var(--transition);
-}
-.btn-new-chat:hover { transform: translateY(-1px); }
-.sidebar-close-mobile { display: none; padding: 8px 12px; font-size: 18px; color: var(--text-secondary); }
-.sessions-list {
-  flex: 1; overflow-y: auto; padding-right: 4px;
-}
-.session-item {
-  display: block; width: 100%; text-align: left;
-  padding: 10px 12px; margin-bottom: 4px;
-  border-radius: var(--radius-md); color: var(--text-secondary);
-  font-size: 13px; line-height: 1.5;
-  cursor: pointer; transition: all var(--transition);
-}
-.session-item:hover { background: var(--bg-input); color: var(--text-primary); }
-.session-item.active { background: var(--bubble-system); color: var(--text-primary); font-weight: 500; }
-.session-item-title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-.session-item-meta { display: block; font-size: 11px; color: var(--text-muted); margin-top: 2px; }
-.sidebar-footer {
-  border-top: 1px solid var(--border); padding-top: 12px; margin-top: 12px;
-  display: flex; flex-direction: column; gap: 8px;
-}
-.user-info { display: flex; align-items: center; gap: 8px; padding: 0 6px; font-size: 12px; }
-.user-badge { color: var(--text-secondary); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-.slot-badge {
-  flex-shrink: 0; padding: 2px 8px; border-radius: 10px;
-  background: var(--bubble-system); color: var(--color-accent);
-  font-size: 11px; font-weight: 600;
-}
-.btn-logout {
-  padding: 8px 12px; font-size: 13px; color: var(--text-muted);
-  border-radius: var(--radius-md); transition: all var(--transition);
-}
-.btn-logout:hover { background: var(--bg-input); color: var(--color-danger); }
-
-/* ─── 主聊天区 ─── */
-.chat-main {
-  flex: 1; min-width: 0;
-  display: flex; flex-direction: column;
-  background: var(--bg-base);
-  position: relative; /* 锚定左右"即将开放"浮动栏 */
-}
-.chat-header {
-  display: flex; align-items: center; gap: 12px;
-  padding: 14px 20px; padding-top: max(14px, env(safe-area-inset-top));
-  /* 让标题和气泡共用同一条中线 */
-  padding-left: max(20px, calc((100% - var(--max-content)) / 2));
-  padding-right: max(20px, calc((100% - var(--max-content)) / 2));
-  border-bottom: 1px solid var(--border);
-  background: var(--bg-elev);
-}
-.sidebar-toggle-mobile { display: none; padding: 6px 10px; font-size: 18px; }
-.chat-title-block { flex: 1; min-width: 0; }
-.chat-title { margin: 0; font-size: 16px; font-weight: 600; }
-.meta-bar { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
-
-.chat-body {
-  flex: 1; overflow-y: auto;
-  padding: 20px; padding-bottom: 12px;
-  /* 让对话气泡始终居中限宽（解决"页面太大看着累"）*/
-  display: flex; flex-direction: column; align-items: center;
-}
-.message-row {
-  display: flex; margin-bottom: 16px;
-  width: 100%; max-width: var(--max-content);
-  /* 气泡进入动画（动态 UI）*/
-  animation: bubble-in 0.32s ease-out both;
-}
-@keyframes bubble-in {
-  from { opacity: 0; transform: translateY(8px); }
-  to   { opacity: 1; transform: translateY(0); }
-}
-.message-row.user { justify-content: flex-end; }
-.message-row.persona, .message-row.system { justify-content: flex-start; }
-.bubble {
-  max-width: 80%;
-  padding: 12px 16px; border-radius: var(--radius-lg);
-  word-wrap: break-word; overflow-wrap: anywhere;
-}
-.bubble.user { background: var(--bubble-user); color: var(--bubble-user-text); border-bottom-right-radius: 4px; box-shadow: 0 4px 14px rgba(74, 92, 184, 0.25); }
-.bubble.persona { background: var(--bubble-persona); color: var(--bubble-persona-text); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
-.bubble.system { background: var(--bubble-system); color: var(--text-secondary); font-size: 13px; font-style: italic; }
-
-/* ─── Markdown 渲染 ─── */
-.bubble.persona h1, .bubble.persona h2, .bubble.persona h3 {
-  margin: 16px 0 8px; line-height: 1.3;
-}
-.bubble.persona h1 { font-size: 1.4em; }
-.bubble.persona h2 { font-size: 1.2em; }
-.bubble.persona h3 { font-size: 1.05em; }
-.bubble.persona p { margin: 8px 0; }
-.bubble.persona ul, .bubble.persona ol { margin: 8px 0; padding-left: 24px; }
-.bubble.persona li { margin: 4px 0; }
-.bubble.persona code {
-  background: var(--code-bg); padding: 2px 6px; border-radius: 4px;
-  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 0.9em;
-}
-.bubble.persona pre {
-  background: var(--code-bg); padding: 12px; border-radius: var(--radius-md);
-  overflow-x: auto; margin: 8px 0;
-}
-.bubble.persona pre code { background: transparent; padding: 0; }
-.bubble.persona table {
-  border-collapse: collapse; margin: 8px 0; width: 100%; font-size: 0.92em;
-}
-.bubble.persona th, .bubble.persona td {
-  border: 1px solid var(--border-strong); padding: 6px 10px;
-}
-.bubble.persona th { background: var(--bg-input); font-weight: 600; }
-.bubble.persona blockquote {
-  border-left: 3px solid var(--color-accent);
-  padding: 4px 12px; margin: 8px 0;
-  color: var(--text-secondary); background: var(--bubble-system); border-radius: 4px;
-}
-.bubble.persona hr { border: none; border-top: 1px solid var(--border-strong); margin: 12px 0; }
-.bubble.persona a { color: var(--color-accent); text-decoration: underline; }
-
-.cursor-blink::after {
-  content: '▋'; opacity: 0.6;
-  animation: blink 1s step-end infinite;
-}
-@keyframes blink { 50% { opacity: 0; } }
-
-/* ─── Composer ─── */
-.composer {
-  display: flex; gap: 8px; align-items: flex-end;
-  padding: 12px 20px;
-  padding-bottom: max(12px, env(safe-area-inset-bottom));
-  /* 与气泡同一条中线 */
-  padding-left: max(20px, calc((100% - var(--max-content)) / 2));
-  padding-right: max(20px, calc((100% - var(--max-content)) / 2));
-  border-top: 1px solid var(--border);
-  background: var(--bg-elev);
-}
-.msg-input {
-  flex: 1; min-height: 40px; max-height: 200px;
-  padding: 10px 14px; resize: none;
-  background: var(--bg-input); border: 1px solid var(--border);
-  border-radius: var(--radius-md); outline: none;
-  font-size: 15px; line-height: 1.5;
-  transition: border-color var(--transition);
-}
-.msg-input:focus { border-color: var(--color-accent); }
-.btn-send {
-  height: 40px; padding: 0 20px;
-  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
-  color: #ffffff; border-radius: var(--radius-md); font-weight: 500;
-  flex-shrink: 0; transition: all var(--transition);
-}
-.btn-send:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(126, 140, 224, 0.3); }
-.btn-send:disabled { opacity: 0.5; cursor: not-allowed; }
-
-/* ─── 移动端 (<= 768px) ─── */
-@media (max-width: 768px) {
-  .sidebar {
-    position: fixed; left: 0; top: 0; bottom: 0; z-index: 10;
-    width: 80%; max-width: 320px;
-    transform: translateX(-100%);
-    transition: transform var(--transition);
-    box-shadow: var(--shadow-card);
-  }
-  .sidebar.open { transform: translateX(0); }
-  .sidebar-close-mobile { display: inline-flex; }
-  .sidebar-toggle-mobile { display: inline-flex; }
-  .chat-header {
-    padding: 12px 14px; padding-top: max(12px, env(safe-area-inset-top));
-    padding-left: 14px; padding-right: 14px;
-  }
-  .chat-body { padding: 14px; }
-  .composer {
-    padding: 10px 14px; padding-bottom: max(10px, env(safe-area-inset-bottom));
-    padding-left: 14px; padding-right: 14px;
-  }
-  .bubble { max-width: 90%; }
-  .login-card { padding: 28px 20px; }
+/* ─── Login ─── */
+#loginScreen {
+  align-items: center;
+  justify-content: center;
 }
 
-/* iPhone 长屏 + 安全区 */
-@supports (padding: max(0px)) {
-  .login-screen { padding-top: max(24px, env(safe-area-inset-top)); padding-bottom: max(24px, env(safe-area-inset-bottom)); }
-}
-
-/* 滚动条美化 (仅 Webkit) */
-.chat-body::-webkit-scrollbar, .sessions-list::-webkit-scrollbar { width: 6px; }
-.chat-body::-webkit-scrollbar-thumb, .sessions-list::-webkit-scrollbar-thumb {
-  background: var(--border-strong); border-radius: 3px;
-}
-.chat-body::-webkit-scrollbar-thumb:hover, .sessions-list::-webkit-scrollbar-thumb:hover {
-  background: var(--text-muted);
-}
-
-/* ─── "即将开放功能" 浮动占位栏（>= 1280px 才显示，给居中聊天区两侧填充呼吸感）─── */
-.coming-soon {
-  display: none;
-  position: absolute; top: 90px; bottom: 90px;
-  width: 200px;
-  padding: 4px;
-  pointer-events: none; /* 视觉装饰，不抢交互 */
-  z-index: 2;
-  overflow-y: auto;
-}
-.coming-soon-left  { left: 24px; }
-.coming-soon-right { right: 24px; }
-.coming-soon-title {
-  font-size: 12px; letter-spacing: 0.08em;
-  color: var(--text-muted); text-transform: none;
-  margin-bottom: 14px; padding: 0 4px;
+.login-container {
   text-align: center;
+  max-width: 400px;
+  width: 90%;
+  padding: 40px 30px;
 }
-.coming-soon-card {
-  pointer-events: auto;
-  background: var(--bg-elev);
-  border: 1px solid var(--border);
-  border-radius: var(--radius-md);
-  padding: 12px 12px;
-  margin-bottom: 10px;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
-  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
-  animation: cs-float 0.6s ease-out both;
-  opacity: 0.92;
+
+.login-icon {
+  font-size: 48px;
+  color: var(--accent);
+  margin-bottom: 16px;
+  text-shadow: 0 0 30px var(--accent-glow);
 }
-.coming-soon-card:hover {
-  transform: translateY(-2px);
-  border-color: var(--border-strong);
-  box-shadow: 0 8px 24px rgba(126, 140, 224, 0.18);
-  opacity: 1;
-}
-@keyframes cs-float {
-  from { opacity: 0; transform: translateY(10px); }
-  to   { opacity: 0.92; transform: translateY(0); }
-}
-.coming-soon-card .cs-icon { font-size: 22px; line-height: 1; margin-bottom: 6px; }
-.coming-soon-card .cs-name {
-  font-size: 13px; font-weight: 600;
+
+.login-title {
+  font-size: 28px;
+  font-weight: 700;
   color: var(--text-primary);
-  margin-bottom: 4px;
+  margin-bottom: 8px;
+  letter-spacing: 2px;
 }
-.coming-soon-card .cs-desc {
-  font-size: 11.5px; line-height: 1.5;
+
+.login-subtitle {
+  font-size: 14px;
   color: var(--text-secondary);
+  margin-bottom: 32px;
 }
 
-@media (min-width: 1280px) {
-  .coming-soon { display: block; }
+.login-status {
+  padding: 10px 16px;
+  border-radius: var(--radius-sm);
+  margin-bottom: 16px;
+  font-size: 13px;
+  line-height: 1.5;
+}
+.login-status.error { background: rgba(231,76,60,0.1); color: var(--danger); border: 1px solid rgba(231,76,60,0.2); }
+.login-status.success { background: rgba(46,204,113,0.1); color: var(--success); border: 1px solid rgba(46,204,113,0.2); }
+.login-status.info { background: var(--accent-glow); color: var(--accent); border: 1px solid rgba(108,92,231,0.2); }
+
+.login-form { display: flex; flex-direction: column; gap: 12px; }
+
+.login-input {
+  width: 100%;
+  padding: 14px 16px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--bg-secondary);
+  color: var(--text-primary);
+  font-size: 15px;
+  outline: none;
+  transition: border-color 0.2s;
+}
+.login-input:focus { border-color: var(--accent); }
+.login-input::placeholder { color: var(--text-muted); }
+
+.code-group { animation: fadeSlide 0.3s ease; }
+
+.login-btn {
+  padding: 14px;
+  border: none;
+  border-radius: var(--radius);
+  background: var(--accent);
+  color: #fff;
+  font-size: 15px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: opacity 0.2s;
+}
+.login-btn:hover { opacity: 0.85; }
+.login-btn:disabled { opacity: 0.4; cursor: not-allowed; }
+
+.slot-info {
+  margin-top: 20px;
+  font-size: 12px;
+  color: var(--text-muted);
 }
 
-/* 浮动栏滚动条 */
-.coming-soon::-webkit-scrollbar { width: 4px; }
-.coming-soon::-webkit-scrollbar-thumb {
-  background: var(--border); border-radius: 2px;
+/* ─── Chat ─── */
+#chatScreen {
+  flex-direction: column;
 }
+
+.chat-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 12px 20px;
+  border-bottom: 1px solid var(--border);
+  background: var(--bg-secondary);
+  flex-shrink: 0;
+}
+
+.chat-header-left { display: flex; align-items: center; gap: 10px; }
+.chat-header-right { display: flex; align-items: center; gap: 8px; }
+
+.header-icon { color: var(--accent); font-size: 18px; }
+.header-title { font-weight: 600; font-size: 15px; }
+
+.model-badge {
+  font-size: 11px;
+  padding: 2px 8px;
+  border-radius: 10px;
+  background: var(--accent-glow);
+  color: var(--accent);
+  border: 1px solid rgba(108,92,231,0.3);
+}
+
+.user-email {
+  font-size: 12px;
+  color: var(--text-muted);
+  max-width: 150px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.header-btn {
+  width: 32px; height: 32px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: transparent;
+  color: var(--text-secondary);
+  font-size: 16px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s;
+}
+.header-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
+
+.chat-messages {
+  flex: 1;
+  overflow-y: auto;
+  padding: 20px;
+  scroll-behavior: smooth;
+}
+
+.message {
+  margin-bottom: 20px;
+  animation: fadeSlide 0.3s ease;
+}
+
+.message.user { text-align: right; }
+.message.assistant { text-align: left; }
+
+.message-content {
+  display: inline-block;
+  max-width: 80%;
+  padding: 12px 16px;
+  border-radius: var(--radius);
+  font-size: 14px;
+  line-height: 1.6;
+  text-align: left;
+  white-space: pre-wrap;
+  word-wrap: break-word;
+}
+
+.message.user .message-content {
+  background: var(--accent);
+  color: #fff;
+  border-bottom-right-radius: 4px;
+}
+
+.message.assistant .message-content {
+  background: var(--bg-tertiary);
+  color: var(--text-primary);
+  border-bottom-left-radius: 4px;
+}
+
+.message.system-note .message-content {
+  font-size: 12px;
+  color: var(--text-muted);
+  background: transparent;
+  padding: 4px 8px;
+}
+
+.message-content p { margin: 0 0 8px; }
+.message-content p:last-child { margin: 0; }
+.message-content code {
+  font-family: 'SF Mono', 'Fira Code', monospace;
+  font-size: 13px;
+  background: rgba(0,0,0,0.3);
+  padding: 2px 6px;
+  border-radius: 3px;
+}
+.message-content pre {
+  background: rgba(0,0,0,0.3);
+  padding: 12px;
+  border-radius: var(--radius-sm);
+  overflow-x: auto;
+  margin: 8px 0;
+}
+.message-content pre code {
+  background: none;
+  padding: 0;
+}
+
+/* Blinking cursor */
+.cursor-blink::after {
+  content: '|';
+  animation: blink 1s step-end infinite;
+  color: var(--accent);
+}
+
+.typing-indicator {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 12px 16px;
+  background: var(--bg-tertiary);
+  border-radius: var(--radius);
+  border-bottom-left-radius: 4px;
+}
+.typing-indicator span {
+  width: 6px; height: 6px;
+  border-radius: 50%;
+  background: var(--text-muted);
+  animation: bounce 1.4s infinite;
+}
+.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
+.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
+
+.chat-input-area {
+  display: flex;
+  align-items: flex-end;
+  gap: 8px;
+  padding: 12px 20px;
+  border-top: 1px solid var(--border);
+  background: var(--bg-secondary);
+  flex-shrink: 0;
+}
+
+.chat-input {
+  flex: 1;
+  padding: 12px 16px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--bg-primary);
+  color: var(--text-primary);
+  font-size: 14px;
+  font-family: inherit;
+  outline: none;
+  resize: none;
+  max-height: 120px;
+  line-height: 1.5;
+  transition: border-color 0.2s;
+}
+.chat-input:focus { border-color: var(--accent); }
+.chat-input::placeholder { color: var(--text-muted); }
+
+.send-btn {
+  width: 42px; height: 42px;
+  border: none;
+  border-radius: var(--radius);
+  background: var(--accent);
+  color: #fff;
+  font-size: 20px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: opacity 0.2s;
+  flex-shrink: 0;
+}
+.send-btn:hover { opacity: 0.85; }
+.send-btn:disabled { opacity: 0.4; cursor: not-allowed; }
+
+/* ─── Animations ─── */
+@keyframes fadeSlide {
+  from { opacity: 0; transform: translateY(8px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+
+@keyframes blink {
+  50% { opacity: 0; }
+}
+
+@keyframes bounce {
+  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
+  40% { transform: scale(1); opacity: 1; }
+}
+
+/* ─── Scrollbar ─── */
+.chat-messages::-webkit-scrollbar { width: 4px; }
+.chat-messages::-webkit-scrollbar-track { background: transparent; }
+.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
+
+/* ─── Responsive ─── */
+@media (max-width: 600px) {
+  .message-content { max-width: 90%; }
+  .chat-header { padding: 10px 14px; }
+  .chat-messages { padding: 14px; }
+  .chat-input-area { padding: 10px 14px; }
+  .user-email { display: none; }
+}
\ No newline at end of file