:root {
  --bg: #0e1117;
  --bg2: #161b26;
  --bg3: #1d2432;
  --border: #2a3242;
  --text: #e6e9ef;
  --muted: #8b95a8;
  --accent: #4f8cff;
  --green: #22c55e;
  --red: #ef4444;
  --gold: #f5b53f;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, "PingFang TC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
.hidden { display: none !important; }
a { color: var(--accent); text-decoration: none; }
button { cursor: pointer; font-family: inherit; }

/* ---------- 登入 ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 14px; padding: 36px 32px; width: 340px; }
.brand { font-size: 22px; font-weight: 700; letter-spacing: .5px; }
.login-card .sub { color: var(--muted); margin: 6px 0 24px; font-size: 13px; }
.login-card label { display: block; font-size: 12px; color: var(--muted); margin: 14px 0 5px; }
.login-card input { width: 100%; padding: 10px 12px; background: var(--bg3); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 14px; }
.login-card input:focus { outline: none; border-color: var(--accent); }
.btn-primary { width: 100%; margin-top: 20px; padding: 11px; background: var(--accent); color: #fff; border: none; border-radius: 8px; font-size: 15px; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.1); }
.err { color: var(--red); font-size: 12px; margin-top: 12px; min-height: 16px; }

/* ---------- 佈局 ---------- */
.app { display: flex; height: 100vh; }
.sidebar { width: 220px; min-width: 220px; background: var(--bg2); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 18px 12px; }
.sidebar .brand { padding: 0 8px 16px; font-size: 18px; }
.nav-group-title { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 1px; margin: 14px 8px 6px; }
.nav-item { display: block; padding: 8px 10px; border-radius: 7px; color: var(--text); font-size: 13.5px; margin: 1px 0; cursor: pointer; }
.nav-item:hover { background: var(--bg3); }
.nav-item.active { background: var(--accent); color: #fff; }
.nav-item .tag { float: right; font-size: 10px; opacity: .7; }
.sidebar-foot { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 8px; }
.btn-ghost { padding: 9px; background: var(--bg3); color: var(--text); border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.btn-ghost:hover { border-color: var(--accent); }
.btn-link { background: none; border: none; color: var(--muted); font-size: 12px; }
.btn-link:hover { color: var(--red); }
#user-box { display: flex; align-items: center; justify-content: space-between; padding: 0 4px; font-size: 12.5px; color: var(--muted); }

.main { flex: 1; overflow-y: auto; padding: 24px 28px; }
#view { max-width: 1280px; margin: 0 auto; }

/* ---------- 卡片 ---------- */
.page-title { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.page-desc { color: var(--muted); margin-bottom: 20px; font-size: 13px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-bottom: 20px; }
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.card .k { color: var(--muted); font-size: 12px; }
.card .v { font-size: 22px; font-weight: 700; margin-top: 6px; }
.card .v.pos { color: var(--green); }
.card .v.neg { color: var(--red); }
.card .v.gold { color: var(--gold); }

/* 策略網格 */
.strategy-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.strategy-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 16px; cursor: pointer; transition: border-color .15s, transform .15s; }
.strategy-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.strategy-card .name { font-weight: 700; font-size: 15px; display: flex; align-items: center; gap: 6px; }
.badge { font-size: 10px; padding: 2px 7px; border-radius: 20px; background: var(--bg3); color: var(--muted); }
.badge.hk { background: #3b2d1a; color: var(--gold); }
.badge.us { background: #17243b; color: var(--accent); }
.strategy-card .desc { color: var(--muted); font-size: 12px; margin: 6px 0 12px; }
.mini-stats { display: flex; gap: 14px; font-size: 12px; }
.mini-stats div b { display: block; font-size: 15px; }

/* 圖表容器 */
.chart { width: 100%; height: 340px; background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; }
.chart.equity { height: 220px; }
.section-title { font-size: 15px; font-weight: 700; margin: 22px 0 10px; }
.sym-block { margin-bottom: 20px; }
.sym-header { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.sym-header .code { font-weight: 700; font-size: 15px; color: var(--accent); }
.sym-header .nm { color: var(--muted); font-size: 12px; }
.inst-header { color: var(--muted); font-size: 12px; margin: 12px 0 6px 18px; }
.inst-header .code { color: var(--gold); font-weight: 600; }
.inst-chart { height: 260px; margin-left: 18px; }

/* 表格 */
table { width: 100%; border-collapse: collapse; background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; font-size: 13px; }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; background: var(--bg3); }
tr:last-child td { border-bottom: none; }
.pos { color: var(--green); } .neg { color: var(--red); }
.buy-tag { color: var(--red); font-weight: 700; }
.sell-tag { color: var(--green); font-weight: 700; }

/* ---------- 對話 ---------- */
.chat-wrap { display: flex; gap: 14px; height: calc(100vh - 120px); }
.chat-sessions { width: 240px; background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 10px; overflow-y: auto; }
.chat-sessions .sess { padding: 10px; border-radius: 8px; cursor: pointer; font-size: 13px; color: var(--text); }
.chat-sessions .sess:hover { background: var(--bg3); }
.chat-sessions .sess.active { background: var(--accent); color: #fff; }
.chat-sessions .sess .t { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-sessions .sess .d { font-size: 11px; color: var(--muted); }
.chat-main { flex: 1; display: flex; flex-direction: column; background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.chat-msgs { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 78%; padding: 10px 14px; border-radius: 12px; line-height: 1.55; white-space: pre-wrap; word-break: break-word; font-size: 13.5px; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 3px; }
.msg.assistant { align-self: flex-start; background: var(--bg3); border: 1px solid var(--border); border-bottom-left-radius: 3px; }
.msg .meta { font-size: 10px; color: var(--muted); margin-top: 4px; }
.chat-input { display: flex; gap: 10px; padding: 14px; border-top: 1px solid var(--border); }
.chat-input textarea { flex: 1; resize: none; height: 44px; padding: 10px 12px; background: var(--bg3); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 14px; font-family: inherit; }
.chat-input textarea:focus { outline: none; border-color: var(--accent); }
.chat-input button { padding: 0 18px; background: var(--accent); color: #fff; border: none; border-radius: 8px; font-weight: 600; }
.loading-dots::after { content: '...'; animation: dots 1s steps(4) infinite; }
@keyframes dots { 0% { content: ''; } 25% { content: '.'; } 50% { content: '..'; } 75% { content: '...'; } }

.empty { color: var(--muted); text-align: center; padding: 40px; font-size: 13px; }
.btn-new-chat { padding: 8px; background: var(--bg3); border: 1px solid var(--border); color: var(--text); border-radius: 8px; margin-bottom: 10px; width: 100%; font-size: 13px; }
.btn-new-chat:hover { border-color: var(--accent); }

@media (max-width: 860px) {
  .sidebar { width: 64px; min-width: 64px; }
  .sidebar .nav-group-title, .sidebar .nav-item span, .sidebar .brand { display: none; }
  .nav-item { text-align: center; }
}