/* ============================================================
   Db2 LUW DBA course - application stylesheet
   Runs from file:// - no imports, no external fonts, no CDN.
   ============================================================ */

:root {
  color-scheme: light dark;

  --ink:        #1b1b1b;
  --ink-soft:   #5a5852;
  --ink-faint:  #8b8880;
  --paper:      #fdfcfa;
  --panel:      #f6f4ef;
  --panel-2:    #efece5;
  --rule:       #ddd8ce;
  --rule-soft:  #e9e5dc;

  --db2:        #1f6f43;
  --db2-bg:     #ecf6f0;
  --ora:        #b3261e;
  --ora-bg:     #fbeeee;
  --blue:       #1d4e79;
  --blue-bg:    #eef4f8;
  --amber:      #a8661a;
  --amber-bg:   #fdf3e7;
  --violet:     #5b3e8e;
  --violet-bg:  #f2eefa;

  --code-bg:    #f3f1ec;
  --shadow:     0 1px 2px rgba(0,0,0,.05), 0 6px 18px rgba(0,0,0,.05);
  --on-db2:     #ffffff;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans:  system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:  ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;

  --sidebar: 16.5rem;
  --read:    46rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:        #e6e3dc;
    --ink-soft:   #a5a29a;
    --ink-faint:  #77746d;
    --paper:      #16181a;
    --panel:      #1d2023;
    --panel-2:    #24282c;
    --rule:       #343a3f;
    --rule-soft:  #2a2f34;

    --db2:        #5fc98d;
    --db2-bg:     #14291f;
    --ora:        #f08a80;
    --ora-bg:     #2e1a18;
    --blue:       #7db6e8;
    --blue-bg:    #16242f;
    --amber:      #e0a45c;
    --amber-bg:   #2c2013;
    --violet:     #b69be8;
    --violet-bg:  #221b30;

    --code-bg:    #1b1f22;
    --shadow:     0 1px 2px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
    --on-db2:     #0d1a13;
  }
}

:root[data-theme="dark"] {
  --ink:        #e6e3dc;
  --ink-soft:   #a5a29a;
  --ink-faint:  #77746d;
  --paper:      #16181a;
  --panel:      #1d2023;
  --panel-2:    #24282c;
  --rule:       #343a3f;
  --rule-soft:  #2a2f34;

  --db2:        #5fc98d;
  --db2-bg:     #14291f;
  --ora:        #f08a80;
  --ora-bg:     #2e1a18;
  --blue:       #7db6e8;
  --blue-bg:    #16242f;
  --amber:      #e0a45c;
  --amber-bg:   #2c2013;
  --violet:     #b69be8;
  --violet-bg:  #221b30;

  --code-bg:    #1b1f22;
  --shadow:     0 1px 2px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
  --on-db2:     #0d1a13;
}

* { box-sizing: border-box; }

html { font-size: 17px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  min-height: 100vh;
}

/* ============================================================ layout */

.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar);
  flex: 0 0 var(--sidebar);
  background: var(--panel);
  border-right: 1px solid var(--rule);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1.1rem 0 3rem;
}

.main { flex: 1 1 auto; min-width: 0; }

.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem 1.2rem;
  background: var(--paper);
  border-bottom: 1px solid var(--rule-soft);
}

.view { padding: 2rem 1.6rem 6rem; }
.view-read { max-width: var(--read); margin: 0 auto; }
.view-wide { max-width: 72rem; margin: 0 auto; }

/* ============================================================ sidebar */

.brand { display: block; padding: 0 1.1rem 1rem; text-decoration: none; color: inherit; border: none; }
.brand .bt { font-family: var(--sans); font-weight: 700; font-size: .95rem; letter-spacing: -.01em; display: block; }
.brand .bs { font-family: var(--mono); font-size: .62rem; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-faint); }

.nav-sec {
  font-family: var(--mono); font-size: .6rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-faint); padding: 1rem 1.1rem .35rem; font-weight: 700;
}

.nav-link {
  display: flex; align-items: center; gap: .5rem;
  padding: .32rem 1.1rem; font-family: var(--sans); font-size: .82rem;
  color: var(--ink-soft); text-decoration: none; border: none; border-left: 2px solid transparent;
}
.nav-link:hover { background: var(--panel-2); color: var(--ink); }
.nav-link.active { color: var(--ink); border-left-color: var(--db2); background: var(--panel-2); font-weight: 600; }
.nav-link .ico { width: 1rem; text-align: center; flex: 0 0 auto; font-size: .9em; }

.nav-month {
  font-family: var(--mono); font-size: .58rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-faint); padding: .85rem 1.1rem .2rem;
}
.nav-lesson { padding-left: 1.1rem; font-size: .78rem; }
.nav-lesson .num { font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); flex: 0 0 1.9rem; }
.nav-lesson.done .num { color: var(--db2); }
.nav-lesson .dot { width: .42rem; height: .42rem; border-radius: 50%; flex: 0 0 auto; background: var(--rule); }
.nav-lesson.done .dot { background: var(--db2); }
.nav-lesson .t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============================================================ controls */

.btn {
  font-family: var(--sans); font-size: .8rem; font-weight: 500;
  padding: .38rem .75rem; border-radius: 6px;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink);
  cursor: pointer; transition: border-color .12s, background .12s;
}
.btn:hover { border-color: var(--ink-faint); }
.btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--blue); outline-offset: 2px;
}
.btn.primary { background: var(--db2); border-color: var(--db2); color: var(--on-db2); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-soft); }
.btn.ghost:hover { background: var(--panel); color: var(--ink); }
.btn[disabled] { opacity: .45; cursor: default; }
.btn.sm { font-size: .72rem; padding: .25rem .55rem; }

.search-box { flex: 1 1 auto; max-width: 26rem; }
.search-box input {
  width: 100%; font-family: var(--sans); font-size: .82rem;
  padding: .4rem .7rem; border-radius: 6px;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink);
}
.spacer { flex: 1 1 auto; }

select, input[type="text"], input[type="search"], textarea {
  font-family: var(--sans); font-size: .82rem; color: var(--ink);
  background: var(--paper); border: 1px solid var(--rule); border-radius: 6px; padding: .35rem .5rem;
}
textarea { font-family: var(--serif); font-size: .92rem; line-height: 1.5; width: 100%; }

/* ============================================================ typography */

.eyebrow {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .15em;
  text-transform: uppercase; color: var(--ink-faint); margin: 0 0 .5rem;
}
h1 { font-size: 2.05rem; line-height: 1.12; font-weight: 600; margin: .1rem 0 .35rem; letter-spacing: -.015em; }
h2 {
  font-size: 1.28rem; font-weight: 600; margin: 2.4rem 0 .7rem;
  padding-bottom: .25rem; border-bottom: 1px solid var(--rule); color: var(--blue);
}
h3 { font-size: 1.04rem; font-weight: 600; margin: 1.7rem 0 .45rem; }
.subtitle { color: var(--ink-soft); font-style: italic; font-size: 1.06rem; margin: 0 0 1.5rem; }
p, li { font-size: 1rem; }
p { margin: .8rem 0; }
a { color: var(--blue); text-decoration: none; border-bottom: 1px solid var(--rule); }
a:hover { border-bottom-color: var(--blue); }
strong { font-weight: 600; }
.sans { font-family: var(--sans); }
.muted { color: var(--ink-soft); }

/* ============================================================ code */

code {
  font-family: var(--mono); font-size: .85em;
  background: var(--code-bg); padding: .1em .35em; border-radius: 3px;
  overflow-wrap: break-word;
}
pre {
  background: var(--code-bg); border: 1px solid var(--rule);
  border-left: 3px solid var(--blue); border-radius: 5px;
  padding: .85rem 1rem; overflow-x: auto; font-size: .8rem; line-height: 1.5;
  margin: 0;
}
pre code { background: none; padding: 0; font-size: 1em; }
.cmt { color: var(--ink-faint); font-style: italic; }
.kw  { color: var(--violet); font-weight: 600; }
.str { color: var(--db2); }
.pre-wrap { position: relative; margin: 1.2rem 0; }
.pre-label {
  font-family: var(--mono); font-size: .6rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: .25rem; display: block;
}
.copy-btn { position: absolute; top: 1.4rem; right: .4rem; opacity: 0; transition: opacity .12s; }
.pre-wrap:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }

/* ============================================================ callouts */

.callout { border-radius: 6px; padding: .8rem 1rem; margin: 1.3rem 0; font-size: .95rem; border-left: 3px solid; }
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }
.callout .tag {
  font-family: var(--mono); font-size: .63rem; letter-spacing: .13em; text-transform: uppercase;
  display: block; margin-bottom: .35rem; font-weight: 700;
}
.c-win    { background: var(--db2-bg);    border-color: var(--db2); }
.c-win .tag { color: var(--db2); }
.c-bridge { background: var(--ora-bg);    border-color: var(--ora); }
.c-bridge .tag { color: var(--ora); }
.c-breaks { background: var(--amber-bg);  border-color: var(--amber); }
.c-breaks .tag { color: var(--amber); }
.c-note   { background: var(--blue-bg);   border-color: var(--blue); }
.c-note .tag { color: var(--blue); }
.c-warn   { background: var(--amber-bg);  border-color: var(--amber); }
.c-warn .tag { color: var(--amber); }
.c-source { background: var(--panel);     border-color: var(--db2); font-size: .9rem; }
.c-source .tag { color: var(--db2); }
.c-mission{ background: var(--violet-bg); border-color: var(--violet); }
.c-mission .tag { color: var(--violet); }

/* ============================================================ tables */

table { border-collapse: collapse; width: 100%; margin: 0; font-size: .9rem; }
caption { caption-side: top; text-align: left; color: var(--ink-soft); font-style: italic; font-size: .88rem; margin-bottom: .4rem; }
th, td { text-align: left; padding: .48rem .65rem; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
thead th { border-bottom: 2px solid var(--ink-faint); font-family: var(--sans); font-size: .7rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); font-weight: 600; }
tbody tr:hover { background: var(--panel); }
td.ora, .t-ora { color: var(--ora); font-family: var(--mono); font-size: .82rem; }
td.db2, .t-db2 { color: var(--db2); font-family: var(--mono); font-size: .82rem; }
.table-scroll { overflow-x: auto; margin: 1.3rem 0; }

/* ============================================================ cards & widgets */

.card {
  background: var(--panel); border: 1px solid var(--rule); border-radius: 8px;
  padding: 1rem 1.1rem; margin: 1.4rem 0;
}
.card-h {
  font-family: var(--mono); font-size: .63rem; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); font-weight: 700; margin: 0 0 .6rem; display: flex; align-items: center; gap: .5rem;
}

.widget { background: var(--panel); border: 1px solid var(--rule); border-radius: 8px; margin: 1.6rem 0; overflow: hidden; }
.widget-head {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
  padding: .6rem .9rem; border-bottom: 1px solid var(--rule); background: var(--panel-2);
}
.widget-title { font-family: var(--sans); font-size: .82rem; font-weight: 600; }
.widget-body { padding: .9rem; }
.hint { font-family: var(--sans); font-size: .74rem; color: var(--ink-faint); }

/* ---- quiz ---- */
.quiz { margin: 1.5rem 0; padding: 1rem 1.1rem; background: var(--panel); border: 1px solid var(--rule); border-radius: 8px; }
.quiz .qn { font-family: var(--mono); font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.quiz .q { font-weight: 600; margin: .3rem 0 .7rem; }
.quiz .opts { list-style: none; padding: 0; margin: 0; }
.quiz .opts li { margin: .35rem 0; }
.quiz .opts button {
  font-family: var(--serif); font-size: .93rem; width: 100%; text-align: left;
  padding: .5rem .75rem; background: var(--paper); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 6px; cursor: pointer;
  transition: border-color .12s, background .12s;
}
.quiz .opts button:hover:not([disabled]) { border-color: var(--blue); }
.quiz .opts button.correct { background: var(--db2-bg); border-color: var(--db2); font-weight: 600; }
.quiz .opts button.wrong   { background: var(--ora-bg); border-color: var(--ora); }
.quiz .fb { font-size: .9rem; margin-top: .7rem; padding: .6rem .75rem; border-radius: 6px; background: var(--code-bg); display: none; }
.quiz .fb.show { display: block; }
.quiz .fb.ok { background: var(--db2-bg); }
.quiz .fb.no { background: var(--ora-bg); }
.quiz-type { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.quiz-type input[type=text] { flex: 1 1 16rem; font-family: var(--mono); font-size: .84rem; }
.quiz-score { font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); }

/* ---- pair matching ---- */
.pairs { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
.pairs .col-h { font-family: var(--mono); font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.pair-btn {
  display: block; width: 100%; text-align: left; font-family: var(--sans); font-size: .8rem;
  padding: .4rem .6rem; margin: .3rem 0; border-radius: 6px; cursor: pointer;
  background: var(--paper); color: var(--ink); border: 1px solid var(--rule);
}
.pair-btn.sel { border-color: var(--blue); background: var(--blue-bg); }
.pair-btn.matched { border-color: var(--db2); background: var(--db2-bg); opacity: .65; cursor: default; }
.pair-btn.bad { border-color: var(--ora); background: var(--ora-bg); }

/* ---- ordering ---- */
.order-list { list-style: none; padding: 0; margin: 0; }
.order-list li {
  display: flex; align-items: center; gap: .6rem;
  background: var(--paper); border: 1px solid var(--rule); border-radius: 6px;
  padding: .45rem .6rem; margin: .3rem 0; font-size: .87rem; font-family: var(--sans);
}
.order-list li .grip { font-family: var(--mono); color: var(--ink-faint); }
.order-list li.ok { border-color: var(--db2); background: var(--db2-bg); }
.order-list li.no { border-color: var(--ora); background: var(--ora-bg); }
.order-list .mv { margin-left: auto; display: flex; gap: .2rem; flex: 0 0 auto; }

/* ---- terminal ---- */
.term {
  background: #10141a; color: #d6e2ea; border-radius: 8px; padding: .8rem .9rem;
  font-family: var(--mono); font-size: .78rem; line-height: 1.5;
  max-height: 24rem; overflow-y: auto;
}
.term .ps1 { color: #6fc98d; }
.term .cmd { color: #e8eef3; }
.term .out { color: #9fb2c0; white-space: pre-wrap; }
.term .err { color: #f08a80; white-space: pre-wrap; }
.term-in { display: flex; gap: .4rem; align-items: center; margin-top: .5rem; }
.term-in .ps1 { font-family: var(--mono); font-size: .78rem; color: var(--db2); }
.term-in input { flex: 1 1 auto; font-family: var(--mono); font-size: .8rem; }
.term-sug { display: flex; gap: .3rem; flex-wrap: wrap; margin-top: .5rem; }
.term-sug button { font-family: var(--mono); font-size: .68rem; padding: .2rem .45rem; }

/* ---- compare tabs ---- */
.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--rule); }
.tab {
  font-family: var(--sans); font-size: .76rem; font-weight: 600; padding: .35rem .8rem;
  border: 1px solid transparent; border-bottom: none; border-radius: 6px 6px 0 0;
  background: transparent; color: var(--ink-faint); cursor: pointer;
}
.tab.active { background: var(--code-bg); border-color: var(--rule); color: var(--ink); }
.tab.k-ora.active { color: var(--ora); }
.tab.k-db2.active { color: var(--db2); }
.tabpanel { display: none; }
.tabpanel.active { display: block; }
.tabpanel pre { border-radius: 0 5px 5px 5px; }

/* ---- reveal ---- */
.reveal { margin: 1.2rem 0; }
.reveal .rq { font-weight: 600; margin-bottom: .4rem; }
.reveal .ra { display: none; padding: .6rem .8rem; background: var(--db2-bg); border-left: 3px solid var(--db2); border-radius: 0 5px 5px 0; }
.reveal.open .ra { display: block; }

/* ---- checklist ---- */
.checklist { list-style: none; padding: 0; margin: .5rem 0; }
.checklist li { display: flex; gap: .55rem; align-items: flex-start; padding: .3rem 0; font-size: .92rem; }
.checklist input { margin-top: .32rem; flex: 0 0 auto; }
.checklist li.done label { color: var(--ink-faint); text-decoration: line-through; }

/* ============================================================ diagrams */

.diagram { width: 100%; }
.diagram svg { width: 100%; height: auto; display: block; max-width: 100%; font-family: var(--sans); }
.dg-node { cursor: pointer; }
.dg-node:hover rect, .dg-node:hover circle, .dg-node:hover ellipse { stroke-width: 2.4; }
.dg-node.sel rect, .dg-node.sel circle, .dg-node.sel ellipse { stroke-width: 3; }
.dg-label { font-size: 11px; fill: var(--ink); pointer-events: none; }
.dg-strong { font-size: 11px; fill: var(--ink); font-weight: 700; pointer-events: none; }
.dg-sub   { font-size: 9px;  fill: var(--ink-soft); pointer-events: none; font-family: var(--mono); }
.dg-title { font-size: 9px; fill: var(--ink-faint); font-family: var(--mono); letter-spacing: .08em; pointer-events: none; }
.dg-flow  { stroke: var(--ink-faint); stroke-width: 1.4; fill: none; }
.dg-panel {
  margin-top: .8rem; padding: .75rem .9rem; background: var(--paper);
  border: 1px solid var(--rule); border-radius: 6px; font-size: .88rem; min-height: 4.5rem;
}
.dg-panel h4 { margin: 0 0 .3rem; font-family: var(--sans); font-size: .92rem; }
.dg-panel p { margin: .35rem 0; }
.dg-panel .kv { display: grid; grid-template-columns: max-content 1fr; gap: .25rem .7rem; margin: .5rem 0 0; font-size: .82rem; }
.dg-panel .kv dt { font-family: var(--mono); font-size: .66rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-faint); padding-top: .15rem; }
.dg-panel .kv dd { margin: 0; }
.dg-empty { color: var(--ink-faint); font-style: italic; }

.ctrl-row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-bottom: .6rem; font-family: var(--sans); font-size: .78rem; }
.ctrl-row label { display: flex; align-items: center; gap: .3rem; color: var(--ink-soft); }
.gauge-wrap { display: flex; align-items: center; gap: .5rem; font-family: var(--mono); font-size: .72rem; }
.gauge { width: 7rem; height: .45rem; background: var(--rule); border-radius: 3px; overflow: hidden; flex: 0 0 auto; }
.gauge .fill { height: 100%; background: var(--db2); transition: width .3s, background .3s; }
.gauge .fill.warn { background: var(--amber); }
.gauge .fill.bad  { background: var(--ora); }

.legend { display: flex; gap: .9rem; flex-wrap: wrap; font-family: var(--sans); font-size: .72rem; color: var(--ink-soft); margin-top: .6rem; }
.legend span { display: flex; align-items: center; gap: .3rem; }
.legend i { width: .7rem; height: .7rem; border-radius: 2px; display: inline-block; }

/* ============================================================ dashboard */

.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: .9rem; margin: 1.5rem 0; }
.stat { background: var(--panel); border: 1px solid var(--rule); border-radius: 8px; padding: .85rem 1rem; }
.stat .n { font-family: var(--sans); font-size: 1.75rem; font-weight: 600; line-height: 1; letter-spacing: -.02em; }
.stat .l { font-family: var(--mono); font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); margin-top: .35rem; }
.stat .sub { font-size: .78rem; color: var(--ink-soft); font-family: var(--sans); margin-top: .2rem; }

.track { margin: 1.8rem 0; }
.track-month { margin-bottom: 1.1rem; }
.track-month .mh { display: flex; align-items: baseline; gap: .6rem; margin-bottom: .4rem; flex-wrap: wrap; }
.track-month .mn { font-family: var(--mono); font-size: .62rem; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-faint); }
.track-month .mt { font-family: var(--sans); font-size: .86rem; font-weight: 600; }
.track-cells { display: flex; gap: .3rem; flex-wrap: wrap; }
.cell {
  width: 2.6rem; height: 2.6rem; border-radius: 6px; border: 1px solid var(--rule);
  background: var(--panel); display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: .7rem; color: var(--ink-soft);
  text-decoration: none; position: relative; transition: transform .1s;
}
.cell:hover { transform: translateY(-2px); border-color: var(--blue); }
.cell.done { background: var(--db2); border-color: var(--db2); color: var(--on-db2); font-weight: 700; }
.cell.next { border-color: var(--db2); border-width: 2px; color: var(--db2); font-weight: 700; }
.cell .score { position: absolute; bottom: 0; right: .15rem; font-size: .5rem; opacity: .85; }

.bar { height: .5rem; background: var(--rule); border-radius: 3px; overflow: hidden; margin: .4rem 0; }
.bar .fill { height: 100%; background: var(--db2); transition: width .4s; }

/* ============================================================ lesson chrome */

.lesson-head { margin-bottom: 1.6rem; }
.objectives { list-style: none; padding: 0; margin: .4rem 0 0; }
.objectives li { padding-left: 1.3rem; position: relative; font-size: .95rem; margin: .25rem 0; }
.objectives li::before { content: "\2192"; position: absolute; left: 0; color: var(--db2); font-family: var(--mono); }

.lesson-nav {
  margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--sans); font-size: .82rem; align-items: center;
}
.lesson-nav a { border: none; }
.ask {
  margin-top: 2.2rem; background: var(--panel); border: 1px dashed var(--rule);
  border-radius: 8px; padding: .9rem 1.1rem; font-size: .93rem;
}
.ask .tag { font-weight: 700; color: var(--blue); font-family: var(--sans); font-size: .82rem; }

.pill {
  display: inline-block; font-family: var(--mono); font-size: .6rem; letter-spacing: .1em;
  text-transform: uppercase; padding: .15rem .45rem; border-radius: 3px; vertical-align: middle;
}
.pill.verified { background: var(--db2-bg); color: var(--db2); border: 1px solid var(--db2); }
.pill.m { background: var(--panel-2); color: var(--ink-faint); border: 1px solid var(--rule); }

/* ============================================================ lists / glossary */

.filter-row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.gl-term { border-bottom: 1px solid var(--rule-soft); padding: .8rem 0; }
.gl-term .th { display: flex; gap: .6rem; align-items: baseline; flex-wrap: wrap; }
.gl-term .tn { font-family: var(--mono); font-size: .95rem; font-weight: 700; color: var(--db2); }
.gl-term .tm { font-size: .93rem; margin: .3rem 0 0; }
.gl-term .to { font-size: .88rem; margin: .3rem 0 0; color: var(--ink-soft); }
.gl-term .to b { color: var(--ora); font-weight: 600; }
.gl-term .tb { font-size: .86rem; margin: .35rem 0 0; padding: .35rem .6rem; background: var(--amber-bg); border-left: 2px solid var(--amber); border-radius: 0 4px 4px 0; }

.flash-card {
  min-height: 13rem; display: flex; flex-direction: column; justify-content: center;
  align-items: center; text-align: center; padding: 2rem 1.5rem;
  background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; box-shadow: var(--shadow);
}
.flash-card .fq { font-family: var(--mono); font-size: 1.3rem; font-weight: 700; color: var(--db2); }
.flash-card .fa { margin-top: 1rem; font-size: .95rem; max-width: 30rem; }
.flash-actions { display: flex; gap: .5rem; justify-content: center; margin-top: 1rem; flex-wrap: wrap; }

.hit { padding: .7rem 0; border-bottom: 1px solid var(--rule-soft); }
.hit .hl { font-family: var(--mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); }
.hit .ht { font-weight: 600; font-size: .98rem; }
.hit .hs { font-size: .86rem; color: var(--ink-soft); margin-top: .15rem; }
.hit mark { background: var(--amber-bg); color: var(--ink); padding: 0 .1em; border-radius: 2px; font-weight: 600; }

/* ============================================================ responsive */

.menu-btn { display: none; }

@media (max-width: 880px) {
  html { font-size: 16px; }
  .sidebar {
    position: fixed; left: 0; top: 0; z-index: 50; transform: translateX(-100%);
    transition: transform .2s; box-shadow: var(--shadow);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  .scrim { display: none; }
  body.nav-open .scrim { display: block; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 40; }
  .menu-btn { display: inline-block; }
  .view { padding-left: 1rem; padding-right: 1rem; }
  .pairs { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .search-box { max-width: none; }
  .cell { width: 2.2rem; height: 2.2rem; font-size: .62rem; }
  .dash-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================ print */

@media print {
  .sidebar, .topbar, .lesson-nav, .ask, .copy-btn, .term-in, .term-sug, .ctrl-row, .flash-actions, .scrim { display: none !important; }
  body { background: #fff; color: #000; }
  .view { padding: 0; max-width: 100%; }
  .shell { display: block; }
  pre, .callout, table, .quiz, .widget, .card { break-inside: avoid; }
  .quiz .fb { display: block !important; }
  a { color: #000; border: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}