:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-elev: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --text-muted: #6e7681;
  --primary: #2f81f7;
  --primary-hover: #1f6feb;
  --pos: #ff4757;     /* 台股紅=漲 */
  --neg: #2ed573;     /* 台股綠=跌 */
  --warn: #f5a623;
  --danger: #da3633;
  --shadow: 0 4px 12px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  padding-bottom: 60px;
}

.mono { font-family: "SF Mono", Menlo, Consolas, monospace; }
.big { font-size: 1.5em; font-weight: 700; }
.pos { color: var(--pos); }
.neg { color: var(--neg); }

/* ===== Top Bar ===== */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-wrap: wrap;
  gap: 12px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
}
.brand .ver {
  font-size: 11px;
  color: var(--primary);
  background: rgba(47,129,247,0.1);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 4px;
}

.account-bar {
  display: flex;
  gap: 16px;
  font-size: 13px;
}
.account-bar .lbl {
  color: var(--text-dim);
  margin-right: 4px;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 4px;
  padding: 8px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  position: sticky;
  top: 49px;
  z-index: 99;
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
}
.tab:hover { background: var(--bg-elev); color: var(--text); }
.tab.active {
  background: var(--bg-elev);
  color: var(--text);
  border-color: var(--border);
}

main { padding: 16px; max-width: 1200px; margin: 0 auto; }

.view { display: none; }
.view.active { display: block; }

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.card h2 {
  font-size: 16px;
  font-weight: 600;
}

/* ===== Form ===== */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.field { display: flex; flex-direction: column; }
.field.full { grid-column: 1 / -1; }
.field label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.field input, .field select, .field textarea {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--primary);
}

/* ===== Buttons ===== */
.btn {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
}
.btn:hover { background: var(--border); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: white; }
.btn.primary:hover { background: var(--primary-hover); }
.btn.danger { background: var(--danger); border-color: var(--danger); color: white; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 4px 10px; font-size: 12px; }

.actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ===== Calc Result ===== */
.calc-result {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-elev);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.r-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}
.r-row > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.r-row .lbl {
  font-size: 11px;
  color: var(--text-dim);
}
.verdict {
  margin-top: 12px;
  padding: 10px;
  border-radius: 6px;
  font-weight: 500;
}
.verdict.ok { background: rgba(46,213,115,0.1); color: var(--neg); border-left: 3px solid var(--neg); }
.verdict.warn { background: rgba(245,166,35,0.1); color: var(--warn); border-left: 3px solid var(--warn); }
.verdict.bad { background: rgba(218,54,51,0.1); color: var(--danger); border-left: 3px solid var(--danger); }

/* ===== Filters ===== */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.filters input, .filters select {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
}

/* ===== Trade List ===== */
.trade-list { display: flex; flex-direction: column; gap: 8px; }
.trade {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: 80px 1fr auto auto auto;
  gap: 12px;
  align-items: center;
  cursor: pointer;
  transition: all 0.15s;
}
.trade:hover { border-color: var(--primary); }
.trade .sym { font-weight: 700; font-size: 16px; }
.trade .name { color: var(--text-dim); font-size: 12px; }
.trade .meta { font-size: 12px; color: var(--text-dim); }
.trade .rmult {
  font-family: "SF Mono", monospace;
  font-weight: 700;
  font-size: 16px;
  text-align: right;
  min-width: 70px;
}
.trade .pnl {
  font-family: "SF Mono", monospace;
  font-size: 13px;
  text-align: right;
  min-width: 100px;
}
.trade .status-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}
.status-tag.OPEN { background: rgba(47,129,247,0.15); color: var(--primary); }
.status-tag.CLOSED { background: rgba(139,148,158,0.15); color: var(--text-dim); }

@media (max-width: 600px) {
  .trade {
    grid-template-columns: 60px 1fr auto;
    grid-template-rows: auto auto;
  }
  .trade .meta, .trade .pnl { grid-column: 1 / -1; font-size: 11px; }
}

/* ===== Dashboard ===== */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}
.stat-card.big {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(47,129,247,0.1), rgba(47,129,247,0.02));
  border-color: var(--primary);
}
.stat-card .lbl {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.stat-card .big-num {
  font-size: 24px;
  font-weight: 700;
  font-family: "SF Mono", monospace;
}
.stat-card.big .big-num { font-size: 36px; }
.stat-card .hint { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

/* ===== Histogram ===== */
.histogram {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 160px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.hist-bar {
  flex: 1;
  background: var(--primary);
  border-radius: 4px 4px 0 0;
  position: relative;
  min-height: 4px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.hist-bar.neg { background: var(--neg); }
.hist-bar.pos { background: var(--pos); }
.hist-bar .label {
  position: absolute;
  bottom: -22px;
  font-size: 10px;
  color: var(--text-dim);
}
.hist-bar .count {
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 4px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: var(--shadow);
  transition: transform 0.3s;
  z-index: 1000;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.ok { border-color: var(--neg); }
.toast.err { border-color: var(--danger); }

/* ===== Hint ===== */
.hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

textarea { resize: vertical; }