:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #1c2230;
  --border: #2a313c;
  --text: #e6edf3;
  --muted: #8b949e;
  --primary: #2f81f7;
  --green: #2ea043;
  --green-soft: rgba(46,160,67,0.18);
  --red: #f85149;
  --red-soft: rgba(248,81,73,0.18);
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}
.hidden { display: none !important; }
a { color: inherit; text-decoration: none; cursor: pointer; }

/* buttons / inputs */
.btn { border: 1px solid var(--border); background: var(--bg3); color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.btn:hover { border-color: var(--primary); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-ghost { background: transparent; }
.btn-danger { color: var(--red); border-color: var(--red); background: transparent; }
.btn-sm { padding: 4px 9px; font-size: 12.5px; }
input, select {
  background: var(--bg); border: 1px solid var(--border); color: var(--text);
  padding: 9px 11px; border-radius: 8px; font-size: 14px; width: 100%;
}
input:focus, select:focus { outline: none; border-color: var(--primary); }
.error { color: var(--red); margin-top: 10px; min-height: 18px; font-size: 13px; }

/* auth */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.auth-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 14px;
  padding: 30px; width: 360px; max-width: 100%; }
.logo { font-size: 22px; font-weight: 700; margin: 0 0 18px; }
.logo span { color: var(--primary); }
.tabs { display: flex; gap: 8px; margin-bottom: 18px; }
.tab { flex: 1; background: transparent; border: none; color: var(--muted);
  padding: 8px; cursor: pointer; border-bottom: 2px solid transparent; font-size: 14px; }
.tab.active { color: var(--text); border-bottom-color: var(--primary); }
.auth-form { display: flex; flex-direction: column; gap: 12px; }

/* app layout */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--bg2); border-right: 1px solid var(--border);
  padding: 20px 16px; display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.sidebar nav { display: flex; flex-direction: column; gap: 4px; margin-top: 14px; }
.nav-item { padding: 10px 12px; border-radius: 8px; color: var(--muted); }
.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: var(--bg3); color: var(--text); }
.sidebar-foot { margin-top: auto; display: flex; flex-direction: column; gap: 8px; }
.user-email { color: var(--muted); font-size: 12.5px; word-break: break-all; }
.view { flex: 1; padding: 26px 32px; max-width: 980px; }

/* headers / toolbars */
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; gap: 12px; }
.page-head h2 { margin: 0; font-size: 20px; }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar .search { flex: 1; min-width: 180px; position: relative; }
.muted { color: var(--muted); }

/* filter chips */
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { background: var(--bg3); border: 1px solid var(--border); border-radius: 20px;
  padding: 5px 12px; font-size: 12.5px; display: flex; align-items: center; gap: 6px; cursor: pointer; }
.chip.active { border-color: var(--primary); color: #fff; }
.chip .x { color: var(--muted); font-weight: 700; }
.chip .x:hover { color: var(--red); }

/* cards / lists */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; margin-bottom: 12px; }
.pf-card { display: flex; align-items: center; justify-content: space-between; }
.pf-card .meta { color: var(--muted); font-size: 12.5px; margin-top: 4px; }
.row-actions { display: flex; gap: 8px; }

/* signal cards */
.signal { border-left: 4px solid var(--border); transition: background-color 5s ease-out; }
.signal.buy { border-left-color: var(--green); }
.signal.sell { border-left-color: var(--red); }
.signal .sig-head { font-weight: 700; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 6px; font-weight: 700; }
.badge.buy { background: var(--green-soft); color: #4ac776; }
.badge.sell { background: var(--red-soft); color: #ff7b72; }
.sig-line { margin-top: 8px; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px; color: var(--text); }
.sig-strats { margin-top: 8px; font-size: 12px; color: var(--muted); }
.sig-strats b { color: var(--text); font-weight: 600; }
.sig-time { color: var(--muted); font-size: 11.5px; margin-left: auto; }
.flash-buy { background-color: var(--green-soft); }
.flash-sell { background-color: var(--red-soft); }

/* dropdown for symbol search */
.dropdown { position: absolute; z-index: 30; left: 0; right: 0; top: 100%; margin-top: 4px;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 8px; max-height: 240px;
  overflow-y: auto; box-shadow: 0 8px 24px rgba(0,0,0,0.4); }
.dropdown div { padding: 8px 12px; cursor: pointer; }
.dropdown div:hover, .dropdown div.hl { background: var(--primary); color: #fff; }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: grid; place-items: center; z-index: 50; }
.modal { background: var(--bg2); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; width: 440px; max-width: 94vw; }
.modal h3 { margin: 0 0 16px; }
.field { margin-bottom: 14px; }
.field label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 12.5px; }
.tf-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.tf-grid .tf { text-align: center; padding: 9px; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.tf-grid .tf.active { border-color: var(--primary); background: var(--bg3); color: #fff; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }
.empty { color: var(--muted); text-align: center; padding: 40px; }
@media (max-width: 640px){ .sidebar{ width: 66px; } .sidebar .logo, .user-email{ display:none;} .nav-item{ text-align:center;} .view{ padding: 18px; } }