:root {
  --bg: #f5f6fa; --panel: #ffffff; --ink: #1c1e26; --muted: #6b7280;
  --line: #e3e5ec; --accent: #4f46e5; --ok: #16a34a; --warn: #d97706;
  --bad: #dc2626; --chip: #eef0f7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161d; --panel: #1e2128; --ink: #e7e9f0; --muted: #9aa1b2;
    --line: #2c303b; --accent: #818cf8; --ok: #4ade80; --warn: #fbbf24;
    --bad: #f87171; --chip: #272b35;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg); color: var(--ink);
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.error { color: var(--bad); min-height: 1.2em; font-size: 13px; }
.spacer { flex: 1; }

/* login */
.login { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 32px 28px; width: min(320px, 90vw); text-align: center;
  display: flex; flex-direction: column; gap: 10px;
}
.login-logo { font-size: 40px; }
.login-card h1 { margin: 0; font-size: 22px; }
.login-card input {
  padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font-size: 15px;
}
.login-card button {
  padding: 10px; border-radius: 10px; border: 0; background: var(--accent);
  color: #fff; font-size: 15px; cursor: pointer;
}

/* header */
header {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; }
header .btn { white-space: nowrap; }
@media (max-width: 480px) {
  #engine-label { display: none; }
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.dot.on { background: var(--ok); }
.dot.off { background: var(--bad); }

.banner {
  padding: 8px 14px; background: color-mix(in srgb, var(--bad) 12%, var(--panel));
  border-bottom: 1px solid var(--line); font-size: 13px;
}
.warn-banner { background: color-mix(in srgb, var(--warn) 15%, var(--panel)); }

/* board */
main#board {
  display: flex; gap: 12px; padding: 12px;
  overflow-x: auto; scroll-snap-type: x mandatory;
  height: calc(100vh - 52px); align-items: flex-start;
}
.col {
  flex: 0 0 300px; max-width: 86vw; scroll-snap-align: start;
  background: color-mix(in srgb, var(--panel) 60%, var(--bg));
  border: 1px solid var(--line); border-radius: 14px;
  max-height: 100%; display: flex; flex-direction: column;
}
.col h2 {
  margin: 0; padding: 10px 14px; font-size: 14px; letter-spacing: .3px;
  border-bottom: 1px solid var(--line);
}
.cards { padding: 10px; display: flex; flex-direction: column; gap: 10px; overflow-y: auto; }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 12px; display: flex; flex-direction: column; gap: 6px;
}
.card .title { font-weight: 600; display: flex; align-items: center; gap: 8px; }
.card .meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: 12px; color: var(--muted); }
.chip {
  background: var(--chip); border-radius: 999px; padding: 1px 9px;
  font-size: 11px; color: var(--muted); white-space: nowrap;
}
.chip.model { color: var(--accent); font-weight: 600; }
.status { font-size: 11px; font-weight: 700; border-radius: 999px; padding: 1px 9px; }
.status.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.status.error, .status.timeout, .status.lost {
  color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, transparent);
}
.status.running { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

.card .actions { display: flex; gap: 8px; margin-top: 2px; }
.btn {
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  border-radius: 9px; padding: 5px 12px; font-size: 13px; cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.warn { color: var(--warn); }
.btn.ghost { border-color: transparent; color: var(--muted); }
.small-btn { font-size: 12px; padding: 4px 10px; }
.run-card { cursor: pointer; }
.empty { color: var(--muted); font-size: 13px; text-align: center; padding: 14px 0; }

/* modal */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center; z-index: 20; padding: 16px;
}
.modal-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  width: min(680px, 96vw); max-height: 84vh; display: flex; flex-direction: column;
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-bottom: 1px solid var(--line);
}
.modal-card pre {
  margin: 0; padding: 14px; overflow: auto; font-size: 13px;
  white-space: pre-wrap; word-break: break-word;
}