/* Serene trader UI — premium dark, no framework, no external assets. */
:root {
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --bg: #090b10;
  --bg-elevated: #11141d;
  --bg-card: #141824;
  --bg-inset: #0c0f16;
  --fg: #eef0f6;
  --fg-muted: #8b93a6;
  --fg-subtle: #5c6378;
  --accent: #6ea8ff;
  --accent-2: #9b8cff;
  --success: #46c08a;
  --warn: #e3aa4e;
  --warning: #d9a62e;
  --danger: #ef6e6e;
  --positive: #4ade80;
  --negative: #f87171;
  --border: #232a3b;
  --radius: 8px;
  --radius-lg: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  background-image:
    radial-gradient(1000px 500px at 85% -10%, rgba(110, 168, 255, 0.07), transparent),
    radial-gradient(800px 400px at -10% 110%, rgba(155, 140, 255, 0.05), transparent);
  color: var(--fg);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.45;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
main.content { max-width: 1480px; margin: 0 auto; padding: 0 1.2rem 3rem; }

/* Top nav */
nav.topbar {
  display: flex; align-items: center; gap: 1.1rem;
  padding: 0.65rem 1.2rem; margin-bottom: 1.2rem;
  border-bottom: 1px solid var(--border); background: rgba(17, 20, 29, 0.7);
}
nav.topbar .brand { font-weight: 700; letter-spacing: 0.02em; color: var(--fg); }
.brand:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
nav.topbar a.nav-link { color: var(--fg-muted); font-size: 0.92rem; }
nav.topbar a.nav-link.active { color: var(--fg); font-weight: 600; }
nav.topbar .spacer { margin-left: auto; }
nav.topbar .user { color: var(--fg-subtle); font-size: 0.85rem; }
nav.topbar button.linkish {
  background: none; border: none; color: var(--fg-muted); cursor: pointer;
  font: inherit; font-size: 0.85rem; padding: 0;
}
nav.topbar button.linkish:hover { color: var(--fg); }

/* Headers */
.page-header { padding: 0.4rem 0 0.9rem; border-bottom: 1px solid var(--border); margin-bottom: 1.1rem; }
.page-header h1 { margin: 0 0 0.25rem; font-size: 1.45rem; }
.page-header p { margin: 0; color: var(--fg-muted); font-size: 0.92rem; }
h2 { font-size: 1.05rem; margin: 1.5rem 0 0.6rem; }
h3 { font-size: 0.92rem; margin: 1rem 0 0.4rem; color: var(--fg-muted); }

/* Cards + grids */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 0.85rem 1rem;
}
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 0.8rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 0.9rem; }
.chart-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(440px, 1fr)); gap: 0.9rem; }
.stat-cells { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.6rem; }
.stat-cells .cell { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.5rem 0.7rem; }
.stat-cells .cell .label { color: var(--fg-subtle); font-size: 0.75rem; }
.stat-cells .cell .value { font-size: 1.1rem; }

/* Pills + badges */
.pill {
  display: inline-block; padding: 0.1rem 0.55rem; border-radius: 999px;
  font-size: 0.75rem; border: 1px solid var(--border); background: var(--bg-card);
  color: var(--fg-muted);
}
.pill.ok { color: var(--success); }
.pill.bad { color: var(--danger); }
.pill.warn { color: var(--warn); }
.window-pills { display: inline-flex; gap: 0.3rem; }
.window-pills .pill { background: var(--bg-elevated); cursor: pointer; user-select: none; }
.window-pills .pill.on {
  background: linear-gradient(135deg, #6ea8ff, #9b8cff);
  color: #0a0c12; font-weight: 600; border-color: transparent;
}
.badge {
  display: inline-block; padding: 0.05rem 0.5rem; border-radius: 999px;
  font-size: 0.72rem; border: 1px solid var(--border); color: var(--fg-muted);
}
.badge-rankable { color: var(--success); background: rgba(70, 192, 138, 0.16); }
.badge-tier-open { color: var(--accent); background: rgba(110, 168, 255, 0.16); }
.badge-unranked { color: var(--fg-muted); }
.badge-pair { color: var(--accent-2); background: rgba(155, 140, 255, 0.16); }
.badge-certainty { color: var(--warn); background: rgba(227, 170, 78, 0.16); }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }
th { text-align: left; color: var(--fg-muted); font-weight: 500; padding: 0.3rem 0.5rem; }
td { padding: 0.32rem 0.5rem; border-top: 1px solid var(--border); }
.scroll-card { overflow-y: auto; overflow-x: auto; }
.mh-340 { max-height: 340px; } .mh-380 { max-height: 380px; } .mh-480 { max-height: 480px; }

/* Helpers */
.muted { color: var(--fg-muted); } .subtle { color: var(--fg-subtle); }
.mono { font-family: var(--mono); }
.pos { color: var(--positive); } .neg { color: var(--negative); } .amber { color: var(--warning); }
.right { text-align: right; }
.alert {
  background: var(--bg-card); border: 1px solid var(--danger); border-radius: var(--radius-lg);
  padding: 0.7rem 1rem; margin: 0.8rem 0; color: var(--danger);
}
.alert.ok { border-color: var(--success); color: var(--success); }
.status-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 0.55rem; margin: 0.6rem 0 1rem; font-size: 0.85rem; }
button.btn {
  background: var(--bg-elevated); color: var(--fg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.32rem 0.8rem; cursor: pointer; font: inherit; font-size: 0.85rem;
}
button.btn:hover { border-color: var(--accent); }
button.btn.primary { background: linear-gradient(135deg, #6ea8ff, #9b8cff); color: #0a0c12; font-weight: 600; border-color: transparent; }
button.btn:disabled { opacity: 0.5; cursor: default; }
select, input {
  background: var(--bg-inset); color: var(--fg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.35rem 0.55rem; font: inherit; font-size: 0.88rem;
}
input { width: 100%; }
label { display: block; margin: 0.7rem 0 0.25rem; font-size: 0.85rem; color: var(--fg-muted); }
code { font-family: var(--mono); background: var(--bg-inset); padding: 0.05rem 0.3rem; border-radius: 4px; font-size: 0.82rem; }

/* Funnel */
.funnel-row { display: grid; grid-template-columns: 220px 1fr 90px; align-items: center; gap: 0.6rem; margin: 0.3rem 0; font-size: 0.84rem; }
.funnel-track { height: 10px; background: var(--bg-inset); border-radius: 6px; overflow: hidden; }
.funnel-fill { height: 100%; border-radius: 6px; }

/* Charts */
.ts-chart { }
.ts-chart .ec-svg { width: 100%; height: auto; aspect-ratio: 8 / 3; }
.ts-chart .chart-head { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 0.3rem; }
.ts-chart .chart-head .title { font-size: 0.9rem; font-weight: 600; }
.ts-chart .chart-head .unit { color: var(--fg-muted); font-size: 0.78rem; }
.ts-chart .legend-chip { font-family: var(--mono); font-size: 0.75rem; }
.chart-empty { padding: 2.2rem 0; text-align: center; font-size: 0.85rem; }
.chart-color-0 { color: var(--accent); }
.chart-color-1 { color: var(--success); }
.chart-color-2 { color: var(--warn); }
.chart-color-3 { color: var(--accent-2); }
.chart-color-4 { color: var(--danger); }
.chart-color-5 { color: var(--fg-muted); }
.ts-chart .caption { color: var(--fg-subtle); font-size: 0.72rem; margin-top: 0.25rem; }
.ts-grid { stroke: var(--border); stroke-width: 1; }
.ts-axis { fill: var(--fg-subtle); font-size: 11px; font-family: var(--mono); }
.ec-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.ec-dot, .ec-tip { opacity: 0; pointer-events: none; }
.ec-pt:hover .ec-dot, .ec-pt:hover .ec-tip { opacity: 1; }
.ec-hit { fill: transparent; }
.ec-tip-box { fill: var(--bg-elevated); stroke: var(--border); }
.ec-tip-text { fill: var(--fg); font-size: 10px; font-family: var(--mono); }

/* Home */
.home-page nav.topbar { flex-wrap: wrap; }
.home-page nav.topbar .user { overflow-wrap: anywhere; min-width: 0; }
.home-page main.home-content { max-width: 900px; padding-top: clamp(1.5rem, 7vh, 4.5rem); }
.home-header { margin-bottom: 2rem; }
.home-header h1 { font-size: clamp(2rem, 5vw, 2.75rem); font-weight: 650; letter-spacing: -0.035em; line-height: 1.15; margin: 0 0 0.75rem; }
.home-header p { margin: 0; color: var(--fg-muted); font-size: 1rem; max-width: 48ch; }
.home-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.home-link { display: block; padding: 1.4rem; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--bg-card); color: var(--fg); }
.home-link h2 { font-size: 1.15rem; margin: 0 0 0.45rem; }
.home-link p { color: var(--fg-muted); margin: 0; max-width: 35ch; }
.home-link:hover { border-color: var(--accent); text-decoration: none; }
.home-link:hover h2 { color: var(--accent); }
.home-page a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.home-admin { margin: 1.4rem 0 0; font-size: 0.88rem; }
.home-admin span { color: var(--fg-muted); margin-left: 0.8rem; }
@media (max-width: 560px) {
  .home-links { grid-template-columns: minmax(0, 1fr); }
  .home-link { padding: 1.15rem; }
  .home-header { margin-bottom: 1.5rem; }
}

/* Login */
.login-wrap { max-width: 380px; margin: 10vh auto 0; }
.login-wrap h1 { font-size: 1.3rem; margin-bottom: 0.2rem; }
.login-wrap .brand { color: var(--fg); }
.login-wrap .brand-sub { color: var(--fg-muted); margin-bottom: 1.2rem; font-size: 0.9rem; }

footer.site { color: var(--fg-subtle); font-size: 0.78rem; text-align: center; padding: 2rem 0 1rem; }