:root {
  --ink: #22272E; --paper: #F6F7F5; --rail: #1B2432; --rail-text: #B9C2CE;
  --ledger-green: #2E7D5B; --amber: #B07A1F; --slate: #3D5A80; --line: #DDE1DC;
  --danger: #8C3B2E; --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, sans-serif; color: var(--ink); background: var(--paper); }
h1, h2 { font-family: "Iowan Old Style", Georgia, serif; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 1.6rem; margin: 0 0 .25rem; }
.sub { color: #5A6472; margin: 0 0 1.5rem; }
.shell { display: flex; min-height: 100vh; }
.rail { width: 200px; background: var(--rail); color: var(--rail-text); padding: 1.5rem 0; display: flex; flex-direction: column; flex-shrink: 0; }
.wordmark { font-family: "Iowan Old Style", Georgia, serif; font-size: 1.35rem; line-height: 1.1; color: #fff; padding: 0 1.25rem 1.5rem; }
.rail a { color: var(--rail-text); text-decoration: none; padding: .55rem 1.25rem; border-left: 3px solid transparent; }
.rail a:hover { color: #fff; }
.rail a.active { color: #fff; border-left-color: var(--ledger-green); background: rgba(255,255,255,.05); }
.rail-foot { margin-top: auto; padding: 1rem 1.25rem 0; font-size: .78rem; opacity: .6; }
.content { flex: 1; padding: 2rem 2.5rem; max-width: 1100px; }
table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); }
th { text-align: left; font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: #5A6472; padding: .6rem .75rem; border-bottom: 2px solid var(--line); }
td { padding: .6rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: none; }
.mono { font-family: var(--mono); font-size: .82rem; color: #5A6472; }
.pill { display: inline-block; padding: .1rem .55rem; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.pill.open { background: #E8EDF4; color: var(--slate); }
.pill.pending_confirmation { background: #F5EBD8; color: var(--amber); }
.pill.ticked { background: #E2EFE8; color: var(--ledger-green); }
.pill.soft_deleted { background: #EEE; color: #777; }
.pill.retired { background: #E6E2EC; color: #56496B; }
.pill.duplicate { background: #E8EDF4; color: var(--slate); }
.pill.stale { background: #EEE; color: #777; }
.pill.stuck { background: #F5EBD8; color: var(--amber); }
.pill.imminent { background: #F5E2D8; color: #A2542B; }
.pill.overdue { background: #F3DAD5; color: var(--danger); }
.panel { margin: 0 0 2rem; }
.panel > h2 { font-size: 1.15rem; margin: 0 0 .25rem; }
.detail { color: #5A6472; font-size: .9rem; margin: 0 0 1rem; }
.ledger td { vertical-align: top; }
.btn { font: inherit; padding: .35rem .7rem; border: 1px solid var(--line); background: #fff; cursor: pointer; }
.btn.primary { background: var(--ledger-green); border-color: var(--ledger-green); color: #fff; }
.pill.pending, .pill.approved { background: #F5EBD8; color: var(--amber); }
.pill.sent { background: #E2EFE8; color: var(--ledger-green); }
/* Signature: the lifecycle trail — the state machine made visible. */
.trail { font-family: var(--mono); font-size: .78rem; color: #5A6472; margin-top: .2rem; }
.trail b { color: var(--ink); font-weight: 600; }
button { font: inherit; padding: .35rem .8rem; border: 1px solid var(--line); background: #fff; border-radius: 4px; cursor: pointer; }
button:hover { border-color: var(--slate); }
button:focus-visible { outline: 2px solid var(--slate); outline-offset: 1px; }
button.danger { color: var(--danger); border-color: #D8C2BD; }
button.danger:hover { border-color: var(--danger); }
button.primary { background: var(--slate); color: #fff; border-color: var(--slate); }
input, select { font: inherit; padding: .4rem .6rem; border: 1px solid var(--line); border-radius: 4px; }
.card { background: #fff; border: 1px solid var(--line); padding: 1.25rem 1.5rem; margin-bottom: 1rem; }
.empty { color: #5A6472; padding: 2rem; text-align: center; background: #fff; border: 1px dashed var(--line); }
.row-actions { display: flex; gap: .4rem; }
.form-row { display: flex; gap: .5rem; margin-bottom: 1rem; flex-wrap: wrap; }
@media (max-width: 800px) { .shell { flex-direction: column; } .rail { width: 100%; } .content { padding: 1rem; } }
/* Pulse: the system's heartbeat, visible in the rail. */
.pulse { margin-top: 1.5rem; padding: .75rem 1.25rem; border-top: 1px solid rgba(255,255,255,.08); }
.pulse-title { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; opacity: .55; margin-bottom: .4rem; }
.pulse-row { display: flex; align-items: center; gap: .45rem; font-size: .82rem; padding: .15rem 0; }
.pulse-row .mono { margin-left: auto; opacity: .6; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #4A5568; }
.dot.idle { background: var(--ledger-green); box-shadow: 0 0 0 0 rgba(46,125,91,.5); animation: pulse-beat 3s ease-out infinite; }
.dot.busy { background: var(--amber); }
@keyframes pulse-beat { 0% { box-shadow: 0 0 0 0 rgba(46,125,91,.45); } 70% { box-shadow: 0 0 0 6px rgba(46,125,91,0); } 100% { box-shadow: 0 0 0 0 rgba(46,125,91,0); } }
@media (prefers-reduced-motion: reduce) { .dot.idle { animation: none; } }
.row { display: flex; gap: .6rem; align-items: center; margin: .6rem 0; }
.result { border-radius: 8px; padding: .8rem 1rem; margin-top: .8rem; }
.result.ok { background: rgba(46,125,91,.08); border: 1px solid rgba(46,125,91,.35); }
.result.bad { background: rgba(155,59,46,.08); border: 1px solid rgba(155,59,46,.35); }
.hint { color: #6B5B1E; font-size: .88rem; }
td.status { width: 2rem; font-size: 1.1rem; }

.banner { border-radius: 8px; padding: .9rem 1.1rem; margin-bottom: 1rem; }
.banner.warn { background: rgba(182,122,15,.1); border: 1px solid rgba(182,122,15,.4); }
.banner.error { background: rgba(155,59,46,.08); border: 1px solid rgba(155,59,46,.4); }

.editor { width: 100%; font-size: .82rem; line-height: 1.45; border: 1px solid #D5DAE3; border-radius: 8px; padding: .8rem; background: #FFF; }

/* --- Sign-in ----------------------------------------------------------- */
main.bare { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--paper, #F7F6F3); }
.login-wrap { width: 100%; max-width: 24rem; padding: 1.5rem; }
.login-card { background: #fff; border: 1px solid var(--line); padding: 2rem; }
.login-card h1 { font-size: 1.35rem; margin: 0 0 .25rem; }
.login-card label { display: block; margin: 1rem 0 .25rem; font-size: .85rem; color: #5A6472; }
.login-card input { width: 100%; padding: .55rem .7rem; border: 1px solid var(--line); font: inherit; }
.login-card button { margin-top: 1.5rem; width: 100%; padding: .6rem; }
.banner { border: 1px solid var(--line); padding: .75rem 1rem; margin: 1rem 0; }
.banner.error { border-color: var(--danger); background: #FDF4F2; }
.banner.warn { border-color: var(--amber); background: #FDF9F1; }
.signed-in { display: flex; align-items: center; gap: .75rem; padding: .5rem 1rem; }