:root {
  --bg: #F4F7FB;
  --surface: #FFFFFF;
  --ink: #14263D;
  --muted: #52657D;
  --primary: #245CCC;
  --border: #D8E1EB;
  --danger: #B52B37;
  --teal: #147565;
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; overflow-x: hidden; }
body { background: var(--bg); color: var(--ink); font: 16px/1.55 var(--sans); }
h1, h2, h3 { margin: 0 0 12px; line-height: 1.3; }
h1 { font-size: 30px; }
h2 { font-size: 24px; }
h3 { font-size: 18px; }
p { margin: 0 0 10px; }
.muted { color: var(--muted); }
.mono, .tag { font-family: var(--mono); font-size: 13px; }
.boot { padding: 24px; color: var(--muted); }

.phase-banner {
  background: var(--ink); color: #fff; font-family: var(--mono); font-size: 13px;
  padding: 8px 16px; letter-spacing: .02em; border-bottom: 3px solid var(--primary);
}

/* Layout */
.shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); min-height: calc(100vh - 38px); }
.sidebar { background: var(--ink); color: #DDE6F2; padding: 20px 14px; display: flex; flex-direction: column; gap: 16px; }
.brand { font-weight: 700; font-size: 18px; color: #fff; }
.brand small { display: block; font-family: var(--mono); font-size: 12px; font-weight: 400; color: #A9B8CC; }
.nav { display: flex; flex-direction: column; gap: 4px; }
.nav button {
  min-height: 44px; text-align: left; background: transparent; color: #DDE6F2; border: 0;
  border-left: 3px solid transparent; padding: 8px 12px; font: inherit; cursor: pointer; border-radius: 0 6px 6px 0;
}
.nav button:hover { background: rgba(255,255,255,.06); }
.nav button[aria-current="page"] { border-left-color: #6E9BF0; background: rgba(255,255,255,.1); color: #fff; font-weight: 600; }
.side-status { font-family: var(--mono); font-size: 12px; color: #A9B8CC; border-top: 1px solid rgba(255,255,255,.15); padding-top: 12px; }
.side-status p { margin: 0 0 6px; }
.side-user { margin-top: auto; font-size: 14px; }
.side-user .btn { width: 100%; margin-top: 8px; background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.main { padding: 24px 28px 48px; min-width: 0; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.toolbar h1 { margin: 0; }

/* Controls */
.btn {
  min-height: 44px; padding: 8px 16px; border-radius: 6px; border: 1px solid var(--primary);
  background: var(--primary); color: #fff; font: inherit; font-weight: 600; cursor: pointer;
}
.btn.secondary { background: var(--surface); color: var(--primary); }
.btn.danger { background: var(--surface); color: var(--danger); border-color: var(--danger); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.linkbtn { min-height: 44px; background: none; border: 0; color: var(--primary); font: inherit; cursor: pointer; padding: 8px 0; text-decoration: underline; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.sidebar :focus-visible { outline-color: #9DBBF5; }

form.panel-form { display: grid; gap: 12px; max-width: 560px; }
.field { display: grid; gap: 4px; }
.field label { font-weight: 600; font-size: 14px; }
.field .hint { font-size: 13px; color: var(--muted); }
input, select, textarea {
  font: inherit; color: var(--ink); background: #fff; border: 1px solid #B8C6D6; border-radius: 6px;
  padding: 10px 12px; min-height: 44px; width: 100%;
}
textarea { min-height: 88px; resize: vertical; }
.form-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.alert { border: 1px solid var(--danger); color: var(--danger); background: #FCF1F2; padding: 10px 12px; border-radius: 6px; }
.ok { border: 1px solid var(--teal); color: var(--teal); background: #EEF7F5; padding: 10px 12px; border-radius: 6px; }

/* Surfaces */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 18px; margin-bottom: 16px; min-width: 0; }
.card.flush { margin: 0; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.stat { font-size: 30px; font-weight: 700; }
.stat-label { font-family: var(--mono); font-size: 12px; color: var(--muted); text-transform: uppercase; }
.notice { border-left: 4px solid var(--primary); background: #EEF3FC; padding: 10px 14px; border-radius: 0 6px 6px 0; margin-bottom: 16px; font-size: 15px; }
.empty { color: var(--muted); padding: 12px 0; }
.tag { display: inline-block; border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; background: var(--bg); color: var(--muted); white-space: nowrap; }
.tag.active { color: var(--teal); border-color: var(--teal); background: #EEF7F5; }
.tag.paused { color: var(--danger); border-color: var(--danger); background: #FCF1F2; }

/* Tables */
.table-wrap { overflow-x: auto; max-width: 100%; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-family: var(--mono); font-size: 12px; color: var(--muted); font-weight: 600; }

/* Support ledger */
.ledger { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.ledger li {
  display: grid; grid-template-columns: 6px minmax(0, 1fr) auto; gap: 14px; align-items: center;
  border: 1px solid var(--border); border-radius: 6px; background: var(--surface); padding: 12px 14px 12px 0;
}
.ledger .strip { align-self: stretch; background: var(--primary); border-radius: 6px 0 0 6px; }
.ledger li.is-paused .strip { background: #A9B8CC; }
.ledger .flow { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: baseline; min-width: 0; }
.ledger .flow strong { overflow-wrap: anywhere; }
.ledger .arrow { font-family: var(--mono); color: var(--muted); }
.ledger .meta { grid-column: 2 / 4; font-size: 14px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 14px; }

.project-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.project-list button {
  width: 100%; min-height: 56px; text-align: left; background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 12px 14px; font: inherit; color: var(--ink); cursor: pointer;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; align-items: center;
}
.project-list button:hover { border-color: var(--primary); }
.project-list .name { font-weight: 600; overflow-wrap: anywhere; }

/* Login */
.login { max-width: 420px; margin: 48px auto; padding: 0 16px; }
.login .card { padding: 24px; }

.tabs { display: flex; flex-wrap: wrap; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.tabs button { min-height: 44px; background: none; border: 0; border-bottom: 3px solid transparent; padding: 8px 14px; font: inherit; color: var(--muted); cursor: pointer; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--primary); font-weight: 600; }

dl.kv { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 4px 14px; margin: 0; }
dl.kv dt { color: var(--muted); font-size: 14px; }
dl.kv dd { margin: 0; overflow-wrap: anywhere; }

/* Workroom */
.ledger .actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.group-ctl { display: inline-flex; gap: 6px; align-items: center; }
.group-ctl select { width: auto; }
.workroom .kv { margin-bottom: 12px; }
.steps { margin: 0 0 10px; padding-left: 22px; }
.device-list { list-style: none; margin: 0 0 10px; padding: 0; display: grid; gap: 6px; }
.device-list li { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot.on { background: var(--teal); }
.dot.off { background: #A9B8CC; }
.paircode-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 8px; }
.paircode { font-family: var(--mono); font-size: 18px; padding: 8px 12px; border: 1px dashed var(--primary); border-radius: 6px; background: #EEF3FC; user-select: all; overflow-wrap: anywhere; }
pre.reply { white-space: pre-wrap; overflow-wrap: anywhere; max-height: 480px; overflow: auto; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 12px; font: 14px/1.5 var(--mono); }

@media (max-width: 760px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar { padding: 12px; gap: 10px; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .nav button { border-left: 0; border-bottom: 3px solid transparent; border-radius: 6px 6px 0 0; }
  .nav button[aria-current="page"] { border-bottom-color: #6E9BF0; }
  .side-user { margin-top: 0; }
  .main { padding: 16px 12px 40px; }
  h1 { font-size: 24px; }
  .ledger li { grid-template-columns: 6px minmax(0, 1fr); }
  .ledger li > .actions { grid-column: 2; }
  .ledger .meta { grid-column: 2; }
  /* tables to cards */
  table.cards thead { display: none; }
  table.cards tr { display: block; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 8px; padding: 6px 8px; background: var(--surface); }
  table.cards td { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 8px; border: 0; padding: 4px 0; overflow-wrap: anywhere; }
  table.cards td::before { content: attr(data-label); font-family: var(--mono); font-size: 12px; color: var(--muted); }
}