/* Hand-built figures for lesson 8, Tokenization. */

/* shared: a piece of text as a chip, an input row, a row of examples */
.tz-chip { display: inline-flex; align-items: center; justify-content: center; min-width: 1.4em; padding: 3px 7px; border-radius: 6px; font: 500 0.92rem/1.3 var(--f-mono); color: var(--ink); background: var(--accent-soft); border: 1px solid var(--accent); white-space: pre; }
.tz-chip.byte { background: transparent; border-style: dashed; border-color: var(--ink-3); color: var(--ink-2); }
.tz-chip.num { font-size: 0.8rem; padding: 2px 5px; }
.tz-chip.new { background: var(--gold-soft); border-color: var(--gold); box-shadow: 0 0 0 2px var(--gold-soft); }
.tz-chip.hit { background: var(--gold-soft); border-color: var(--gold); }
.tz-chip.unk { flex-direction: column; gap: 1px; background: transparent; border: 1px dashed var(--bad); color: var(--bad); }
.tz-chip.unk small { font-size: 0.7rem; color: var(--ink-3); text-decoration: line-through; }
.tz-in { display: flex; flex-direction: column; gap: 6px; font-size: 0.8rem; color: var(--ink-3); }
.tz-in input { font: 1.05rem var(--f-mono); color: var(--ink); background: var(--bg-2); border: 1px solid var(--line-2); border-radius: var(--r-1); padding: 10px 12px; width: 100%; box-sizing: border-box; }
.tz-in input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.tz-try { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 12px 0 4px; font-size: 0.85rem; }
.tz-try .btn { font-family: var(--f-mono); white-space: pre; }
.fig b.good { color: var(--good); } .fig b.bad { color: var(--bad); }

/* hero: the same sentence, more merges each time */
.hb-stack { display: grid; max-width: 900px; margin: 0 auto; padding: 10px 12px 0; }
.hb { grid-area: 1 / 1; display: flex; flex-direction: column; align-items: center; gap: 14px; min-height: 150px; opacity: 0; transition: opacity 0.45s; }
.hb.in { opacity: 1; }
.hb-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 5px; }
.hb-chips .tz-chip { font-size: 1.05rem; padding: 5px 9px; }
.hb-cap { margin: 0; font: 500 0.75rem/1 var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
.hb-cap b { color: var(--gold); font-weight: 500; }
@media (max-width: 700px) { .hb { min-height: 200px; } .hb-chips .tz-chip { font-size: 0.85rem; padding: 3px 6px; } }

/* 1: three kits */
.tk-rows { display: grid; gap: 14px; margin-top: 16px; }
.tk-row { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; padding: 12px 14px; border-radius: var(--r-1); background: var(--bg-2); border: 1px solid var(--line); }
@media (min-width: 760px) { .tk-row { grid-template-columns: 11rem minmax(0, 1fr) 9rem; align-items: start; } .tk-n { text-align: right; } }
.tk-h { display: flex; flex-direction: column; gap: 3px; font-size: 0.82rem; color: var(--ink-3); }
.tk-h b { color: var(--ink); font-weight: 600; font-size: 0.9rem; }
.tk-chips { display: flex; flex-wrap: wrap; gap: 5px; min-height: 2em; }
.tk-n { margin: 0; font-size: 0.85rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.tk-n b { color: var(--ink); font-size: 1.1rem; }

/* 2: the trainer */
.bt { display: grid; gap: 18px; margin-top: 16px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .bt { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr); } }
.bt .kicker { margin: 0 0 10px; }
.bt-text { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 4px; padding: 12px; border-radius: var(--r-1); background: var(--bg-2); border: 1px solid var(--line); min-height: 3.2em; }
.bt-word { display: inline-flex; gap: 3px; }
.bt-dot { color: var(--ink-3); padding: 0 4px; font-size: 1.1rem; }
.fig .bt ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 0.85rem; color: var(--ink-2); }
.bt-pairs li { display: grid; grid-template-columns: auto minmax(40px, 1fr) 2ch auto; align-items: center; gap: 8px; padding: 4px 8px; border-radius: 6px; }
.bt-pairs li.win { background: var(--gold-soft); }
.bt-pairs li.win em { font: 500 0.7rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); font-style: normal; }
.bt-pairs li b, .bt-rules li b { color: var(--ink); font-variant-numeric: tabular-nums; }
.bt-pair { display: inline-flex; align-items: center; gap: 3px; }
.bt-pair i, .mr-rules i, .pr th i { font-style: normal; color: var(--ink-3); padding: 0 1px; }
.bt-bar { display: block; height: 8px; border-radius: 4px; background: var(--surface-2); overflow: hidden; }
.bt-bar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.bt-pairs li.win .bt-bar i { background: var(--gold); }
.bt-rules li { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.bt-arrow { color: var(--ink-3); padding: 0 3px; }

/* 3: replaying the rules */
.mr-ctl { display: grid; gap: 14px; }
@media (min-width: 760px) { .mr-ctl { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: end; } }
.mr-ctl .slider { justify-content: space-between; }
.mr-ctl .slider input { flex: 1 1 100%; width: 100%; }
.fig ol.mr-rules { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 0.82rem; }
.mr-rules li { display: inline-flex; align-items: center; gap: 4px; transition: opacity 0.3s; }
.mr-rules li.off { opacity: 0.35; }
.mr-rules li.off .tz-chip { background: transparent; border-style: dashed; }
.mr-n { font: 500 0.7rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin-right: 4px; }
.fig ol.mr-trace { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 8px; }
.mr-trace li { display: grid; grid-template-columns: 4.2rem minmax(0, auto) minmax(0, 1fr); gap: 10px; align-items: center; padding: 8px 10px; border-radius: var(--r-1); background: var(--bg-2); border: 1px solid var(--line); }
.mr-trace li.done { border-color: var(--gold); }
.mr-step { font: 500 0.7rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.mr-trace li.done .mr-step { color: var(--gold); }
.mr-syms { display: inline-flex; flex-wrap: wrap; gap: 3px; }
.mr-note { font-size: 0.82rem; color: var(--ink-2); }
.mr-note b { color: var(--ink); }
@media (max-width: 700px) { .mr-trace li { grid-template-columns: 1fr; gap: 6px; } }

/* 4: the byte ladder */
.bl-scroll { overflow-x: auto; margin-top: 16px; padding-bottom: 4px; }
.bl-scroll:focus-visible { outline: 2px solid var(--accent); }
.fig table.bl { border-collapse: separate; border-spacing: 2px 4px; font-size: 0.85rem; margin: 0; width: auto; }
.bl th { text-align: left; font: 500 0.7rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); padding: 4px 10px 4px 0; white-space: nowrap; position: sticky; left: 0; background: var(--surface); }
.bl td { text-align: center; padding: 5px 7px; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--line); font-family: var(--f-mono); white-space: pre; color: var(--ink); }
.bl td.cut { box-shadow: -3px 0 0 var(--gold); }
.bl td.num { font-size: 0.78rem; color: var(--ink-2); min-width: 2.2em; }
.bl tr:last-child td { background: var(--accent-soft); border-color: var(--accent); }
.bl tr:last-child td.byte { background: transparent; border-style: dashed; border-color: var(--ink-3); }
.bl tr:last-child td.part { color: var(--ink-2); }
.bl-piece { display: block; }
.bl-id { display: block; font-size: 0.72rem; color: var(--gold); }
.bl-note { font-size: 0.75rem; margin: 6px 0 0; }
.bl-read code { font-size: 0.85rem; white-space: pre-wrap; overflow-wrap: anywhere; }

/* 5: two rankings */
.pr-scroll { overflow-x: auto; margin-top: 14px; }
.fig table.pr { border-collapse: collapse; width: 100%; font-size: 0.85rem; margin: 0; }
.pr th, .pr td { padding: 7px 10px; text-align: right; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; white-space: nowrap; }
.pr thead th { font: 500 0.7rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.pr tbody th { text-align: left; font-weight: 400; display: flex; align-items: center; gap: 4px; }
.pr tbody th em { font: 500 0.68rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); font-style: normal; margin-left: 8px; }
.pr tr.win { background: var(--gold-soft); }
.pr td.by { color: var(--ink); font-weight: 600; }
.pr-bar { display: inline-block; min-width: 4.5rem; padding: 2px 8px; border-radius: 4px; background: linear-gradient(to left, var(--accent-soft) calc(var(--w) * 100%), transparent calc(var(--w) * 100%)); }
.pr tr.win .pr-bar { background: linear-gradient(to left, var(--gold-soft) calc(var(--w) * 100%), transparent calc(var(--w) * 100%)); }

.pr-ctl .seg { flex-wrap: wrap; }
.pr-ctl .seg button { white-space: normal; height: auto; line-height: 1.3; padding: 7px 12px; }

/* 6: the meter */
.tm { display: grid; gap: 22px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .tm { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; } }
.tm-in { display: grid; gap: 12px; }
.tm-in .slider { justify-content: space-between; }
.tm-in .slider span { flex: 1 1 10rem; }
.tm-in .slider b { min-width: 5ch; text-align: right; }
.tm-in .slider input { flex: 1 1 100%; width: 100%; }
.tm-out { display: grid; gap: 12px; padding: 16px; border-radius: var(--r-2); background: var(--bg-2); border: 1px solid var(--line); }
.tm-meter { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr) 5.5rem; align-items: center; gap: 10px; }
.tm-lbl { font: 500 0.7rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.tm-bar { display: block; height: 14px; border-radius: 7px; background: var(--surface-2); overflow: hidden; }
.tm-bar i { display: block; height: 100%; border-radius: 7px; background: var(--accent); transition: width 0.15s; }
.tm-meter:nth-child(2) .tm-bar i { background: var(--gold); }
.tm-meter b { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink); }
.tm-total { margin: 4px 0 0; font-size: 0.95rem; color: var(--ink-2); display: flex; flex-wrap: wrap; gap: 4px 18px; }
.tm-total b { color: var(--ink); font-size: 1.15rem; }
.tm-words { margin: 0; font-size: 0.8rem; }
@media (max-width: 480px) { .tm-meter { grid-template-columns: 6rem minmax(0, 1fr) 5rem; gap: 6px; } .tm-lbl { font-size: 0.62rem; } }

/* 7: frosted glass */
.fg-ctl { display: grid; gap: 12px; grid-template-columns: minmax(0, 1fr); align-items: end; }
@media (min-width: 760px) { .fg-ctl { grid-template-columns: minmax(0, 1fr) 8rem minmax(0, 1fr); } }
.fg-letter { display: flex; flex-direction: column; gap: 6px; font-size: 0.8rem; color: var(--ink-3); }
.fg-letter input { font: 1.05rem var(--f-mono); color: var(--ink); background: var(--bg-2); border: 1px solid var(--line-2); border-radius: var(--r-1); padding: 10px 12px; width: 100%; box-sizing: border-box; text-align: center; }
.fg-letter input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.fg-chk { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--ink-2); padding-bottom: 10px; }
.fg-chk input { accent-color: var(--accent); width: 16px; height: 16px; }
.fg { display: grid; gap: 16px; margin-top: 16px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 760px) { .fg { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.fg-side { padding: 14px; border-radius: var(--r-1); background: var(--bg-2); border: 1px solid var(--line); }
.fg-side .kicker { margin: 0 0 10px; }
.fg-letters, .fg-ids { display: flex; flex-wrap: wrap; gap: 5px; min-height: 3.6em; align-items: flex-start; }
.fg-id { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; padding: 5px 10px; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--line-2); font-family: var(--f-mono); }
.fg-id b { font-weight: 500; color: var(--gold); }
.fg-id small { font-size: 0.78rem; color: var(--ink-2); white-space: pre; filter: blur(5px); opacity: 0.55; transition: filter 0.3s, opacity 0.3s; user-select: none; }
.fg-id.lifted small { filter: none; opacity: 1; user-select: auto; }
.fg-n { margin: 10px 0 0; font-size: 0.85rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.fg-n b { color: var(--ink); }
.fg-read b { overflow-wrap: anywhere; }