/* ============ Simsute Chat — 仿 chatgpt.com 明暗双主题 ============ */
:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

:root, html[data-theme="dark"] {
  --bg: #212121;
  --bg-deep: #171717;
  --sidebar-bg: #171717;
  --sidebar-border: #2f2f2f;
  --panel: #2a2a2a;
  --panel-hover: #2f2f2f;
  --input-bg: #2f2f2f;
  --input-border: #565869;
  --text: #ececf1;
  --text-dim: #b0b0bb;
  --text-faint: #7a7a85;
  --accent: #10a37f;
  --accent-hover: #1a7f64;
  --danger: #ef4444;
  --code-bg: #101014;
  --code-header: #1b1b21;
  --bubble-user: #2f2f2f;
  --bubble-border: #404040;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  --scrim: rgba(0, 0, 0, 0.6);
}

html[data-theme="light"] {
  --bg: #ffffff;
  --bg-deep: #f9f9f9;
  --sidebar-bg: #f9f9f9;
  --sidebar-border: #e5e5e5;
  --panel: #ffffff;
  --panel-hover: #f2f2f2;
  --input-bg: #ffffff;
  --input-border: #c2c2c2;
  --text: #1f1f1f;
  --text-dim: #535353;
  --text-faint: #8e8e8e;
  --accent: #10a37f;
  --accent-hover: #0d8b6d;
  --danger: #dc2626;
  --code-bg: #f6f8fa;
  --code-header: #eef0f3;
  --bubble-user: #f2f2f2;
  --bubble-border: #e0e0e0;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
  --scrim: rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}
button { font-family: inherit; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-root { height: 100vh; display: flex; flex-direction: column; overflow: hidden; }

/* ---------- 通用按钮 / 输入 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--input-border); border-radius: 8px;
  background: var(--panel); color: var(--text);
  padding: 8px 14px; font-size: 14px; cursor: pointer; transition: background .15s, border-color .15s;
}
.btn:hover:not(:disabled) { background: var(--panel-hover); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn.block { width: 100%; }
.btn.danger { color: var(--danger); }
.btn.mini { padding: 4px 10px; font-size: 12px; border-radius: 6px; }
.btn.mini.danger { color: var(--danger); }
.btn.send {
  width: 34px; height: 34px; padding: 0; border-radius: 50%;
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.btn.send:hover:not(:disabled) { background: var(--accent-hover); }
.btn.send.stop { background: var(--text-dim); border-color: var(--text-dim); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0; border: none; border-radius: 8px;
  background: transparent; color: var(--text-dim); cursor: pointer;
}
.icon-btn:hover { background: var(--panel-hover); color: var(--text); }
.icon-btn.danger:hover { color: var(--danger); }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field-label { font-size: 13px; font-weight: 600; color: var(--text-dim); }
.field input {
  padding: 10px 12px; border-radius: 8px; border: 1px solid var(--input-border);
  background: var(--input-bg); color: var(--text); font-size: 15px; outline: none;
}
.field input:focus { border-color: var(--accent); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: var(--panel); border: 1px solid var(--input-border); border-radius: 10px;
  padding: 10px 18px; box-shadow: var(--shadow); z-index: 2000; max-width: 80vw;
  font-size: 14px;
}
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--accent); color: var(--accent); }
.toast-enter-active, .toast-leave-active { transition: opacity .2s, transform .2s; }
.toast-enter-from, .toast-leave-to { opacity: 0; transform: translateX(-50%) translateY(10px); }

/* ---------- 登录/注册 ---------- */
.auth-wrap {
  flex: 1; display: flex; align-items: center; justify-content: center;
  background: var(--bg-deep); padding: 20px;
}
.auth-card {
  width: 100%; max-width: 380px; background: var(--bg); border: 1px solid var(--sidebar-border);
  border-radius: 16px; padding: 28px; box-shadow: var(--shadow);
}
.auth-logo { display: flex; justify-content: center; margin-bottom: 6px; }
.auth-title { text-align: center; font-size: 20px; margin: 10px 0 22px; font-weight: 700; }
.auth-switch { text-align: center; font-size: 14px; color: var(--text-dim); margin-top: 14px; }
.auth-hint { text-align: center; font-size: 12px; color: var(--text-faint); margin-top: 18px; }

/* ---------- 布局 ---------- */
.chat-shell { flex: 1; display: flex; height: 100vh; overflow: hidden; }
.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--bg); }

/* ---------- 侧栏 ---------- */
.sidebar {
  width: 264px; flex-shrink: 0; display: flex; flex-direction: column;
  background: var(--sidebar-bg); border-right: 1px solid var(--sidebar-border);
  transition: margin-left .2s ease;
}
.sidebar.collapsed { margin-left: -264px; }
.sidebar-top { padding: 12px; }
.sidebar-new {
  width: 100%; justify-content: flex-start; gap: 10px; padding: 10px 12px;
  background: transparent; border-color: transparent; border-radius: 10px; font-size: 14px;
}
.sidebar-new:hover { background: var(--panel-hover); border-color: var(--sidebar-border); }
.sidebar-search { padding: 4px 12px 10px; }
.sidebar-search input {
  width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid transparent;
  background: var(--input-bg); color: var(--text); font-size: 13px; outline: none;
}
.sidebar-search input:focus { border-color: var(--input-border); }
.sidebar-list { flex: 1; overflow-y: auto; padding: 4px 8px; }
.sidebar-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 8px 10px; margin-bottom: 2px; border: none; border-radius: 8px;
  background: transparent; color: var(--text); font-size: 13.5px; text-align: left; cursor: pointer;
}
.sidebar-item:hover { background: var(--panel-hover); }
.sidebar-item.active { background: var(--panel-hover); }
.item-icon { flex-shrink: 0; color: var(--text-faint); display: flex; }
.item-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item-actions { display: none; gap: 2px; }
.sidebar-item:hover .item-actions { display: inline-flex; }
.sidebar-empty { color: var(--text-faint); font-size: 13px; text-align: center; padding: 20px 0; }
.sidebar-bottom { border-top: 1px solid var(--sidebar-border); padding: 10px 8px; }
.user-row { display: flex; align-items: center; gap: 10px; padding: 6px 8px; }
.avatar {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 600;
}
.user-info { display: flex; flex-direction: column; min-width: 0; }
.user-email { font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-plan { font-size: 11.5px; color: var(--text-faint); }
.user-plan.active { color: var(--accent); }
.user-menu { display: flex; flex-direction: column; gap: 2px; margin-top: 4px; }
.user-menu-btn {
  text-align: left; padding: 7px 10px; border: none; border-radius: 8px;
  background: transparent; color: var(--text-dim); font-size: 13px; cursor: pointer;
}
.user-menu-btn:hover { background: var(--panel-hover); color: var(--text); }

.sidebar-overlay {
  position: fixed; inset: 0; background: var(--scrim); z-index: 40;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex; align-items: center; gap: 6px; padding: 8px 12px;
  border-bottom: 1px solid var(--sidebar-border); flex-shrink: 0; min-height: 52px;
}
.menu-btn { margin-right: 4px; }
.topbar-spacer { flex: 1; }
.topbar-title {
  font-size: 14px; font-weight: 600; max-width: 40vw;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-dim);
}
.model-select-wrap { position: relative; }
.model-select {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px;
  border: 1px solid transparent; border-radius: 10px; background: transparent;
  color: var(--text); font-size: 14px; cursor: pointer;
}
.model-select:hover { background: var(--panel-hover); border-color: var(--sidebar-border); }
.model-name { font-weight: 500; }
.model-dropdown {
  position: absolute; top: 42px; left: 0; width: 320px; max-height: 420px; overflow-y: auto;
  background: var(--panel); border: 1px solid var(--sidebar-border); border-radius: 12px;
  box-shadow: var(--shadow); z-index: 100; padding: 6px;
}
.dropdown-title { font-size: 12px; color: var(--text-faint); padding: 8px 10px; }
.model-option {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 10px; border: none; border-radius: 8px; background: transparent;
  color: var(--text); text-align: left; cursor: pointer;
}
.model-option:hover { background: var(--panel-hover); }
.model-option.selected { background: var(--panel-hover); }
.model-option:disabled { opacity: .45; cursor: not-allowed; }
.model-option-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.model-option-name { font-size: 14px; font-weight: 500; }
.model-option-desc { font-size: 12px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.model-option-badge { flex-shrink: 0; font-size: 11px; padding: 2px 8px; border-radius: 999px; }
.model-option-badge.image { background: rgba(16, 163, 127, .15); color: var(--accent); }
.model-option-badge.unavailable { background: var(--input-bg); color: var(--text-faint); }
.dropdown-error { font-size: 12px; color: var(--danger); padding: 8px 10px; }

/* ---------- 聊天区 ---------- */
.chat-scroll { flex: 1; overflow-y: auto; }
.messages { max-width: 768px; margin: 0 auto; padding: 24px 20px 40px; }
.empty-state { text-align: center; padding: 15vh 20px; color: var(--text-dim); }
.empty-state h2 { font-size: 30px; font-weight: 700; margin: 0 0 8px; color: var(--text); }

.msg { display: flex; gap: 16px; padding: 16px 0; }
.msg-avatar { flex-shrink: 0; margin-top: 2px; }
.msg-avatar svg { display: block; }
.msg-body { flex: 1; min-width: 0; font-size: 15px; }
.msg.user .msg-body { text-align: right; }

/* 用户气泡 */
.msg.user .markdown {
  display: inline-block; text-align: left; background: var(--bubble-user);
  border: 1px solid var(--bubble-border); border-radius: 14px; padding: 10px 16px;
  max-width: 100%;
}
.msg.user .markdown > :first-child { margin-top: 0; }
.msg.user .markdown > :last-child { margin-bottom: 0; }

/* 错误消息 */
.msg-error { color: var(--danger); }
.msg-error .err-badge {
  display: inline-block; font-size: 12px; background: rgba(239, 68, 68, .12);
  border: 1px solid var(--danger); border-radius: 6px; padding: 2px 8px; margin-bottom: 8px;
}

/* 打字指示 */
.typing { display: inline-flex; gap: 4px; padding: 10px 0; }
.typing span {
  width: 7px; height: 7px; border-radius: 50%; background: var(--text-faint);
  animation: blink 1.2s infinite;
}
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .2; } 40% { opacity: 1; } }

/* 图片卡片 */
.img-card { margin-top: 10px; max-width: 420px; }
.img-card img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--sidebar-border); display: block; }
.img-meta { padding: 6px 2px 0; }
.img-download { font-size: 13px; }

/* markdown */
.markdown { word-break: break-word; }
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { line-height: 1.3; margin: 1.2em 0 .6em; }
.markdown p { margin: .7em 0; }
.markdown ul, .markdown ol { padding-left: 1.5em; margin: .7em 0; }
.markdown li { margin: .25em 0; }
.markdown blockquote {
  margin: .8em 0; padding: 2px 14px; border-left: 3px solid var(--accent); color: var(--text-dim);
}
.markdown table { border-collapse: collapse; margin: .8em 0; width: 100%; }
.markdown th, .markdown td { border: 1px solid var(--input-border); padding: 6px 12px; text-align: left; }
.markdown th { background: var(--panel-hover); }
.markdown code { font-family: var(--mono); font-size: .9em; background: var(--code-bg); padding: 2px 5px; border-radius: 4px; }
.markdown a { color: var(--accent); text-decoration: underline; }
.markdown img { max-width: 100%; border-radius: 8px; }

/* 代码块 */
.code-wrap { margin: .9em 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--sidebar-border); background: var(--code-bg); }
.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px; background: var(--code-header); border-bottom: 1px solid var(--sidebar-border);
}
.code-lang { font-size: 12px; color: var(--text-faint); font-family: var(--mono); }
.code-copy { font-size: 12px; border: none; background: transparent; color: var(--text-dim); cursor: pointer; padding: 2px 8px; border-radius: 6px; }
.code-copy:hover { background: var(--panel-hover); color: var(--text); }
.code-wrap pre.code-block { margin: 0; padding: 14px 16px; overflow-x: auto; }
.code-wrap pre code { font-family: var(--mono); font-size: 13.5px; line-height: 1.55; background: transparent; padding: 0; }

/* ---------- 输入区 ---------- */
.composer-wrap { flex-shrink: 0; padding: 6px 0 10px; }
.composer-inner { max-width: 768px; margin: 0 auto; padding: 0 20px; }
.mode-switch { display: flex; gap: 4px; margin-bottom: 6px; padding-left: 4px; }
.mode-btn {
  font-size: 13px; padding: 5px 12px; border-radius: 999px; border: 1px solid transparent;
  background: transparent; color: var(--text-dim); cursor: pointer;
}
.mode-btn:hover { color: var(--text); }
.mode-btn.active { background: var(--panel-hover); color: var(--text); border-color: var(--input-border); }

.input-shell {
  display: flex; align-items: flex-end; gap: 8px;
  border: 1px solid var(--input-border); border-radius: 18px; padding: 8px 10px;
  background: var(--input-bg); box-shadow: var(--shadow);
}
.composer-input {
  flex: 1; border: none; background: transparent; color: var(--text);
  font-family: inherit; font-size: 15px; line-height: 1.5; resize: none; outline: none;
  max-height: 200px; padding: 6px 4px;
}
.composer-input::placeholder { color: var(--text-faint); }
.input-tools { display: flex; align-items: center; gap: 4px; }
.tool-btn {
  width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
  border: none; border-radius: 8px; background: transparent; color: var(--text-dim); cursor: pointer;
}
.tool-btn:hover { background: var(--panel-hover); color: var(--text); }
.tool-btn.active { color: var(--accent); }
.send-btn-wrap { display: flex; }
.composer-hint {
  text-align: center; font-size: 11.5px; color: var(--text-faint); margin: 8px 0 0;
}

/* ---------- 弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: var(--scrim); z-index: 300;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  background: var(--bg); border: 1px solid var(--sidebar-border); border-radius: 16px;
  padding: 22px; width: 100%; max-width: 400px; box-shadow: var(--shadow);
}
.modal h3 { margin: 0 0 16px; font-size: 18px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ---------- 管理后台 ---------- */
.admin-wrap { flex: 1; display: flex; flex-direction: column; height: 100vh; }
.admin-header {
  display: flex; align-items: center; gap: 14px; padding: 14px 20px;
  border-bottom: 1px solid var(--sidebar-border);
}
.admin-header h1 { font-size: 20px; margin: 0; }
.admin-stats { margin-left: auto; font-size: 13px; color: var(--text-dim); }
.admin-stats b { color: var(--text); }
.admin-body { flex: 1; overflow-y: auto; padding: 20px; }
.admin-toolbar { display: flex; gap: 10px; margin-bottom: 16px; align-items: center; }
.admin-search {
  flex: 1; max-width: 320px; padding: 8px 12px; border-radius: 8px;
  border: 1px solid var(--input-border); background: var(--input-bg); color: var(--text); font-size: 14px;
}
.admin-table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: 12px; overflow: hidden; }
.admin-table th, .admin-table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--sidebar-border); font-size: 13.5px; }
.admin-table th { background: var(--panel-hover); font-weight: 600; color: var(--text-dim); }
.admin-table td { vertical-align: middle; }
.cell-email { font-weight: 500; }
.tag-admin {
  margin-left: 6px; font-size: 11px; color: var(--accent); border: 1px solid var(--accent);
  border-radius: 4px; padding: 0 5px;
}
.status-badge { font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.status-badge.ok { background: rgba(16, 163, 127, .15); color: var(--accent); }
.status-badge.no { background: rgba(239, 68, 68, .15); color: var(--danger); }
.cell-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.admin-pager { display: flex; align-items: center; gap: 14px; justify-content: center; margin-top: 18px; font-size: 13px; color: var(--text-dim); }

.center-pane { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--sidebar-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 50; margin-left: 0; transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar.collapsed { margin-left: 0; }
  .topbar-title { display: none; }
  .messages { padding: 16px 14px 30px; }
  .composer-inner { padding: 0 12px; }
  .msg { gap: 10px; }
}