:root {
  --ink:        #11151b;
  --ink-2:      #3b4552;
  --ink-3:      #6a7583;
  --paper:      #eef1f4;
  --surface:    #ffffff;
  --surface-2:  #e4e9ee;
  --line:       #cfd7de;
  --line-soft:  #dee4ea;
  --accent:     #0b6e75;
  --accent-ink: #075056;
  --accent-wash:#d9ecec;
  --ok:         #2f7247;
  --ok-wash:    #dff0e4;
  --warn:       #a4560d;
  --warn-wash:  #f8ebda;
  --crit:       #a52f2c;
  --crit-wash:  #f7e3e2;
  --serif: "IBM Plex Serif", Georgia, serif;
  --sans:  "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e8edf2; --ink-2: #b0bcc9; --ink-3: #7e8b99;
    --paper: #0e1218; --surface: #161c24; --surface-2: #1e2630;
    --line: #2c3743; --line-soft: #232c37;
    --accent: #4bb3ba; --accent-ink: #7fd0d5; --accent-wash: #123134;
    --ok: #5fae7b; --ok-wash: #16301f;
    --warn: #d38b3d; --warn-wash: #2f2211;
    --crit: #d9706b; --crit-wash: #2e1b1a;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 15px; line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- pin wall ---------- */
#pinwall { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
#pinform {
  background: var(--surface); border: 1px solid var(--line);
  padding: 28px; width: 100%; max-width: 340px;
  display: flex; flex-direction: column; gap: 10px;
}
#pinform h1 { font-family: var(--serif); font-size: 26px; margin: 0 0 6px; letter-spacing: -.02em; }
#pinform label { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
#pinform input {
  font: inherit; padding: 10px 12px; border: 1px solid var(--line);
  background: var(--paper); color: var(--ink);
}
#pinform button { background: var(--accent); color: #fff; border: 0; padding: 11px; font-weight: 600; }
.err { color: var(--crit); font-size: 13px; margin: 0; }

/* ---------- masthead ---------- */
.mast {
  background: var(--surface); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.mast-top {
  max-width: 1080px; margin: 0 auto; padding: 16px 20px 10px;
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
}
.eyebrow {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase; color: var(--accent);
}
.brand h1 {
  font-family: var(--serif); font-size: 25px; font-weight: 700;
  letter-spacing: -.02em; margin: 2px 0 0; line-height: 1.1;
}
.ghost {
  background: none; border: 1px solid var(--line); color: var(--ink-2);
  width: 34px; height: 34px; flex: none; font-size: 15px; line-height: 1;
}
.ghost:hover { background: var(--surface-2); }

.counters {
  max-width: 1080px; margin: 0 auto; padding: 0 20px 14px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  margin-inline: 20px; max-width: calc(1080px - 40px);
}
@media (min-width: 720px) { .counters { grid-template-columns: repeat(6, 1fr); } }
.counter { background: var(--surface); padding: 9px 11px; }
.counter dt {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-3); margin: 0 0 2px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.counter dd {
  margin: 0; font-family: var(--mono); font-size: 21px; font-weight: 600;
  font-variant-numeric: tabular-nums; letter-spacing: -.02em; line-height: 1.15;
}
.counter dd span { font-size: 11px; font-weight: 400; color: var(--ink-3); margin-left: 2px; }
.counter.hot dd { color: var(--crit); }
.counter.warm dd { color: var(--warn); }

.tabs {
  max-width: 1080px; margin: 12px auto 0; padding: 0 20px;
  display: flex; gap: 2px; overflow-x: auto;
}
.tab {
  background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 9px 13px; color: var(--ink-3); font-size: 14px; font-weight: 500; white-space: nowrap;
}
.tab.is-on { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- layout ---------- */
main { max-width: 1080px; margin: 0 auto; padding: 20px 20px 72px; }
.panel { display: flex; flex-direction: column; gap: 18px; }
.cols { display: grid; gap: 18px; }
@media (min-width: 760px) { .cols { grid-template-columns: 1fr 1fr; } }

.block { background: var(--surface); border: 1px solid var(--line); }
.block-hd {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  padding: 13px 16px; border-bottom: 1px solid var(--line-soft);
}
.block-hd h2 { font-size: 15px; font-weight: 600; margin: 0; letter-spacing: -.01em; }
.meta { font-family: var(--mono); font-size: 11px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------- attention ---------- */
.alert {
  border: 1px solid var(--line); border-left: 3px solid var(--crit);
  background: var(--crit-wash); padding: 12px 16px; font-size: 14px; color: var(--ink);
}
.alert.warn { border-left-color: var(--warn); background: var(--warn-wash); }
.alert b { font-weight: 600; }

/* ---------- task list ---------- */
.tasks { list-style: none; margin: 0; padding: 0; }
.tasks li {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 11px 16px; border-bottom: 1px solid var(--line-soft);
}
.tasks li:last-child { border-bottom: 0; }
.tasks li.empty { color: var(--ink-3); font-size: 14px; }
.tick {
  width: 19px; height: 19px; flex: none; margin-top: 1px;
  border: 1.5px solid var(--line); background: var(--surface);
  display: grid; place-items: center; font-size: 12px; color: transparent; padding: 0;
}
.tick[aria-pressed="true"] { background: var(--ok); border-color: var(--ok); color: #fff; }
.tick.busy { opacity: .45; }
.t-body { flex: 1; min-width: 0; }
.t-title { font-size: 14.5px; font-weight: 500; }
.tasks li.done .t-title { color: var(--ink-3); text-decoration: line-through; }
.t-sub { font-size: 12.5px; color: var(--ink-3); margin-top: 1px; }
.t-tag {
  font-family: var(--mono); font-size: 9.5px; font-weight: 600; letter-spacing: .07em;
  text-transform: uppercase; padding: 2px 6px; background: var(--surface-2);
  color: var(--ink-2); white-space: nowrap; align-self: flex-start; margin-top: 2px;
}
.t-tag.LC { background: var(--accent-wash); color: var(--accent-ink); }
.t-tag.Mock { background: var(--crit-wash); color: var(--crit); }

/* ---------- chips ---------- */
.chips { list-style: none; margin: 0; padding: 12px 16px; display: flex; flex-wrap: wrap; gap: 7px; }
.chips:empty::after { content: "Nothing due."; color: var(--ink-3); font-size: 14px; }
.chip {
  border: 1px solid var(--line); background: var(--surface); padding: 4px 9px;
  font-size: 13px; display: inline-flex; gap: 7px; align-items: center; max-width: 100%;
}
.chip button { background: none; border: 0; padding: 0; font: inherit; color: inherit; text-align: left; }
.chip .m { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); }
.chip.low { border-left: 3px solid var(--crit); }
.chip.medium { border-left: 3px solid var(--warn); }
.chip.high { border-left: 3px solid var(--ok); }

/* ---------- track bars ---------- */
.trackbars { padding: 14px 16px; display: flex; flex-direction: column; gap: 9px; }
.tb { display: grid; grid-template-columns: 34px 1fr 28px; gap: 10px; align-items: center; }
.tb-k { font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.tb-rail { height: 8px; background: var(--surface-2); position: relative; }
.tb-fill { height: 100%; background: var(--accent); }
.tb-fill.starved { background: var(--crit); }
.tb-n { font-family: var(--mono); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- filters + topic grid ---------- */
.filters { display: flex; flex-direction: column; gap: 10px; }
#topicSearch {
  font: inherit; padding: 10px 13px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink); width: 100%;
}
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pill {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-2);
  padding: 5px 11px; font-size: 13px;
}
.pill.is-on { background: var(--accent); border-color: var(--accent); color: #fff; }

.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 620px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 940px) { .grid { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: var(--surface); border: 0; border-left: 3px solid var(--line);
  padding: 12px 14px; text-align: left; display: flex; flex-direction: column; gap: 4px;
}
.card:hover { background: var(--surface-2); }
.card.c-Low { border-left-color: var(--crit); }
.card.c-Medium { border-left-color: var(--warn); }
.card.c-High { border-left-color: var(--ok); }
.card-t { font-size: 14px; font-weight: 500; line-height: 1.3; }
.card-m { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); display: flex; gap: 8px; flex-wrap: wrap; }
.card-due { color: var(--crit); font-weight: 600; }

/* ---------- burndown ---------- */
#burndown { padding: 16px; min-width: 560px; }
.bd { display: flex; align-items: flex-end; gap: 6px; height: 150px; }
.bd-col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; gap: 2px; min-width: 26px; }
.bd-bars { display: flex; gap: 2px; align-items: flex-end; height: 130px; }
.bd-p, .bd-a { flex: 1; min-height: 2px; }
.bd-p { background: var(--surface-2); }
.bd-a { background: var(--accent); }
.bd-k { font-family: var(--mono); font-size: 9.5px; color: var(--ink-3); text-align: center; }
.legend { display: flex; gap: 16px; padding: 0 16px 14px; font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.legend i { width: 10px; height: 10px; display: inline-block; margin-right: 5px; vertical-align: -1px; }

/* ---------- mastery ---------- */
.mastery-row { padding: 12px 16px; border-bottom: 1px solid var(--line-soft); }
.mastery-row:last-child { border-bottom: 0; }
.mastery-hd { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 7px; }
.mastery-hd b { font-size: 13.5px; font-weight: 600; }
.dots { display: flex; flex-wrap: wrap; gap: 3px; }
.dot { width: 11px; height: 11px; background: var(--surface-2); border: 0; padding: 0; }
.dot.s-Learning { background: var(--accent-wash); }
.dot.s-Practising { background: var(--warn); }
.dot\.s-Solid, .dot.s-Solid { background: var(--ok); }
.dot.s-Needsrevision { background: var(--crit); }

/* ---------- content pipeline ---------- */
.pipeline { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 760px) { .pipeline { grid-template-columns: repeat(3, 1fr); } }
.lane { background: var(--surface); padding: 13px 15px; }
.lane h3 {
  font-family: var(--mono); font-size: 10.5px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 9px;
}
.lane ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.lane li { font-size: 13.5px; border-left: 2px solid var(--line); padding-left: 9px; }
.lane li .m { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); display: block; }
.lane li.noSource { border-left-color: var(--crit); }

/* ---------- drawer ---------- */
.drawer { position: fixed; inset: 0; background: rgba(10,14,18,.5); z-index: 40; display: flex; justify-content: flex-end; }
.drawer-panel {
  background: var(--surface); width: min(560px, 100%); height: 100%;
  overflow-y: auto; border-left: 1px solid var(--line);
  display: flex; flex-direction: column;
}
.drawer-hd {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 12px;
  padding: 18px 20px 14px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--surface);
}
.drawer-hd h2 { font-family: var(--serif); font-size: 21px; margin: 3px 0 0; letter-spacing: -.015em; line-height: 1.2; }
.drawer-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); gap: 1px;
  background: var(--line-soft); margin: 0; border-bottom: 1px solid var(--line);
}
.drawer-meta > div { background: var(--surface); padding: 9px 12px; }
.drawer-meta dt { font-family: var(--mono); font-size: 9.5px; letter-spacing: .09em; text-transform: uppercase; color: var(--ink-3); }
.drawer-meta dd { margin: 2px 0 0; font-size: 13px; font-weight: 500; }
.drawer-res { padding: 14px 20px; border-bottom: 1px solid var(--line-soft); background: var(--accent-wash); }
.drawer-res h3 { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-ink); margin: 0 0 5px; }
.drawer-res p { margin: 0; font-size: 13.5px; color: var(--ink-2); }
.drawer-body { padding: 16px 20px 40px; }
.drawer-body h3 { font-size: 15px; margin: 18px 0 6px; }
.drawer-body p { margin: 0 0 10px; font-size: 14px; color: var(--ink-2); }
.drawer-body li { font-size: 14px; color: var(--ink-2); margin-bottom: 4px; }
.drawer-body pre {
  background: var(--surface-2); padding: 11px 13px; overflow-x: auto;
  font-family: var(--mono); font-size: 12.5px; margin: 0 0 12px;
}
.drawer-body blockquote {
  margin: 0 0 12px; padding-left: 12px; border-left: 3px solid var(--accent);
  color: var(--ink-2); font-size: 14px;
}
.drawer-body .none { color: var(--ink-3); font-size: 14px; }
.drawer-body hr { border: 0; border-top: 1px solid var(--line-soft); margin: 16px 0; }

footer {
  max-width: 1080px; margin: 0 auto; padding: 16px 20px 32px;
  border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 6px 18px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
}
.scrollx { overflow-x: auto; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }