:root {
  --bg: #19191c;
  --sidebar: #1f2023;
  --surface: #25262a;
  --ink: #f2f3f5;
  --muted: #8b8e96;
  --line: #33353a;
  --hover: #2c2e34;
  --accent: #5e6ad2;
  --accent-ink: #ffffff;
  --danger: #e5484d;
  --ok: #8b8e96;
  --match: #333a51;
  --extra: #433d2d;
  --extra-ink: #d4b483;
  --mis: #432d2f;
  --mis-ink: #e7a8a6;
  --golden: #43464f;
  --radius-control: 6px;
  --radius-menu: 8px;
  --radius-modal: 12px;
  --shadow-pop: 0 12px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.06);
  --row: 36px;
  --sidebar-w: 232px;
  color: var(--ink);
  background: var(--bg);
  font: 14px/1.45 Inter, ui-sans-serif, system-ui, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.02em; }
h2 { font-size: 15px; }
h3 { font-size: 14px; font-weight: 500; }
a { color: inherit; }

.app { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }
.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--line);
  padding: 14px 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.ws { padding: 6px 8px 12px; font-weight: 500; }
.side-label { margin: 14px 8px 4px; color: var(--muted); font-size: 12px; }
.side-list { display: grid; gap: 2px; min-height: 0; }
.side-link, .side-quiet {
  display: block;
  width: 100%;
  text-align: left;
  text-decoration: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  border-radius: var(--radius-control);
  padding: 6px 8px;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.side-link.active, .side-link:hover, .side-quiet:hover { background: var(--hover); }
.side-quiet { margin-top: auto; color: var(--muted); }
.side-empty { margin: 0 8px; color: var(--muted); font-size: 13px; }

.main { min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}
.crumbs { margin: 0; color: var(--muted); font-size: 13px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--ink); }
.canvas { padding: 22px 24px 64px; min-width: 0; }
.page-title { font-size: 20px; margin-bottom: 6px; }
.lead { margin: 0 0 18px; color: var(--muted); max-width: 62ch; }

.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.grid { display: grid; gap: 16px; }
.study-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.study-card {
  display: grid;
  gap: 6px;
  align-content: start;
  min-height: 112px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
}
.study-card:hover { background: var(--hover); }
.study-card strong { font-weight: 500; }
.muted, .study-card span { color: var(--muted); font-size: 12px; }
.empty {
  min-height: 280px;
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  gap: 8px;
}
.empty p { margin: 0; color: var(--muted); max-width: 36ch; }

button.btn, .btn {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: var(--radius-control);
  padding: 6px 10px;
  text-decoration: none;
  font-size: 13px;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.danger, .danger { color: var(--danger); background: transparent; border-color: transparent; }
button:disabled { opacity: .45; cursor: default; }
button.btn[aria-current="true"], .tabs button[aria-current="true"] {
  background: var(--hover);
  border-color: var(--line);
}

.tabs { display: flex; gap: 4px; margin: 0 0 18px; }
.section { padding: 16px 0 8px; border-top: 1px solid var(--line); }
.majority { margin: 8px 0 0; max-width: 68ch; }
.task, .person, .path {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 6px;
}
.task h3, .person strong { font-size: 14px; font-weight: 500; }
.steps { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 4px; }
.steps li { display: grid; grid-template-columns: 22px 1fr; gap: 8px; align-items: start; min-height: var(--row); }
.idx { color: var(--muted); font-size: 12px; padding-top: 2px; }

.stats { display: flex; flex-wrap: wrap; gap: 18px 28px; padding-bottom: 4px; }
.stat b { display: block; font-size: 20px; font-weight: 600; }
.stat span { color: var(--muted); font-size: 12px; }

.chart-head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.legend { display: flex; gap: 14px; color: var(--muted); font-size: 12px; }
.swatch { width: 10px; height: 10px; display: inline-block; margin-right: 6px; vertical-align: -1px; border-radius: 2px; }
.chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 0 0;
  border-bottom: 1px solid var(--line);
}
.col { width: 108px; flex: 0 0 108px; display: grid; justify-items: center; gap: 6px; }
.bars { height: 148px; width: 100%; margin-top: 18px; display: flex; align-items: flex-end; justify-content: center; gap: 6px; }
.bar-col { width: 22px; border-radius: 3px 3px 0 0; position: relative; min-height: 0; }
.bar-col.golden { background: var(--golden); }
.bar-col.users { background: var(--accent); }
.bar-col b {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 4px);
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
}
.col-label { margin: 8px 0 0; font-size: 12px; text-align: center; line-height: 1.3; }
.col-note { margin: 0 0 10px; font-size: 11px; color: var(--muted); }
.col-note.kept { color: #c9cdf8; }
.col-note.lost { color: var(--mis-ink); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chip { border-radius: var(--radius-control); padding: 3px 7px; background: var(--match); color: #d5daf8; font-size: 12px; }
.chip.extra { background: var(--extra); color: var(--extra-ink); }
.chip.misclick { background: var(--mis); color: var(--mis-ink); }
.arrow { color: var(--muted); }
.path header, .person header { display: flex; justify-content: space-between; gap: 8px; align-items: center; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12px; }

label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: var(--radius-control);
  padding: 8px 10px;
}
textarea { min-height: 68px; resize: vertical; }
.banner, .ok { padding: 8px 10px; border-radius: var(--radius-control); margin: 0 0 14px; font-size: 13px; }
.banner { background: var(--mis); color: var(--mis-ink); }
.ok { background: #272d41; color: #d5daf8; }

.scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 20;
}
.modal {
  width: min(560px, 100%);
  background: var(--surface);
  border-radius: var(--radius-modal);
  box-shadow: var(--shadow-pop);
  padding: 18px;
  display: grid;
  gap: 12px;
}
.modal h2 { font-size: 20px; }
.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login form { width: min(420px, 100%); display: grid; gap: 12px; }
.login h1 { font-size: 22px; }

.frame-box { overflow: auto; border: 1px solid var(--line); border-radius: var(--radius-menu); padding: 12px; background: #151619; }
.frame-scale { transform-origin: top left; }
iframe.screen { border: 0; background: white; display: block; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; word-break: break-all; color: var(--muted); }

@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .side-quiet { margin-top: 8px; }
}