/* Spare Keys - a key cabinet on a hallway wall: bottle-green enamel frame, cream pegboard, brass rails and keys,
 * coloured plastic fobs; the letter is cream paper in a sealed envelope. */
:root {
  --bg: #f3f0e8; --panel: #fffdf8; --card: #ece6d8; --ink: #1f2622; --muted: #535e58; --line: #d6cdbb;
  --accent: #22463c; --accent-ink: #ffffff; --soft: #e2ebe5;
  --cab: #22463c; --cab-back: #efe6cf; --peg: #d8cba9; --brass: #87600f; --brass-hi: #b88a2c; --hole: #efe6cf; --rail-ink: #3a4740;
  --blank: #b3261e; --blank-ink: #ffffff; --cut: #24703f;
  --f-care: #b0442a; --f-health: #2b679a; --f-home: #56721c; --f-bills: #8a5800; --f-money: #1d6a53; --f-papers: #6a4a93; --f-digital: #46536a; --f-people: #a3376a; --f-none: #6b6b6b; --fob-ink: #ffffff;
  --warn: #8a4b00; --warn-bg: #fbefdc; --fix: #a3271b; --fix-bg: #fbe3df; --note-bg: #e6ede8;
  --paper: #fffcf3; --paper-ink: #24221c; --paper-rule: #e3c9c0; --env: #e9dfc8; --env-ink: #2d2a20; --seal: #7a1f22;
  --slab: Rockwell, "Roboto Slab", "Courier New", Georgia, serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
:root[data-theme="dark"] {
  --bg: #101412; --panel: #171d1a; --card: #212925; --ink: #e8ede9; --muted: #a8b4ad; --line: #33403a;
  --accent: #8fd0b4; --accent-ink: #0d1a14; --soft: #1d2d26;
  --cab: #0a1f18; --cab-back: #1b2924; --peg: #2a3b34; --brass: #d7b15a; --brass-hi: #f0cd7c; --hole: #1b2924; --rail-ink: #d4ddd7;
  --blank: #ff8f86; --blank-ink: #1d0b09; --cut: #7fdc9f;
  --f-care: #f2a58e; --f-health: #8fc3ec; --f-home: #b7d47c; --f-bills: #f1c36a; --f-money: #7fd5b6; --f-papers: #c7aaf0; --f-digital: #b6c2d6; --f-people: #f4a0c6; --f-none: #c4c4c4; --fob-ink: #101412;
  --warn: #f2b765; --warn-bg: #33270f; --fix: #ff9a8a; --fix-bg: #3a1a16; --note-bg: #1c2b25;
  --paper: #ece6d6; --paper-ink: #24221c; --paper-rule: #c9a99d; --env: #c9bd9f; --env-ink: #1f1c14; --seal: #8e2a2d;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--sans); }
a { color: var(--accent); }
.hidden { display: none !important; }
.small { font-size: 0.86rem; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
button { font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; max-width: 100%; }
input[type=checkbox], input[type=radio] { width: auto; accent-color: var(--accent); }
textarea { resize: vertical; line-height: 1.45; }
input:focus, select:focus, textarea:focus, button:focus-visible, a:focus-visible, .ky:focus-visible { outline: 3px solid var(--accent); outline-offset: 1px; }

/* Header */
.bar { display: flex; align-items: center; gap: 12px; padding: 10px 16px; border-bottom: 3px solid var(--cab); background: var(--panel); flex-wrap: wrap; }
.back { text-decoration: none; font-size: 0.9rem; color: var(--muted); }
.brand { display: flex; align-items: center; gap: 8px; font-family: var(--slab); font-size: 1.15rem; }
.logo { width: 30px; height: 30px; }
.lg-head { fill: var(--brass); }
.lg-hole { fill: var(--panel); }
.lg-shaft { fill: none; stroke: var(--brass); stroke-width: 3; stroke-linecap: round; }
.session { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.pill { display: inline-flex; align-items: center; gap: 4px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 8px; padding: 6px 13px; font-size: 0.88rem; cursor: pointer; text-decoration: none; }
.pill:hover:not(:disabled) { background: var(--card); }
.pill.solid { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.pill.solid:hover:not(:disabled) { background: var(--accent); color: var(--accent-ink); filter: brightness(1.1); }
.pill.ghost { cursor: default; }
.pill.tiny { padding: 3px 10px; font-size: 0.8rem; }
.pill.big { padding: 10px 20px; font-size: 1rem; font-weight: 700; }
.pill:disabled { opacity: 0.55; cursor: not-allowed; }

main { max-width: 1120px; margin: 0 auto; padding: 0 16px 24px; }
.hero { padding: 26px 0 10px; }
.kicker { margin: 0 0 8px; font-size: 0.85rem; font-weight: 600; color: var(--accent); }
.kicker .muted { font-weight: 400; }
h1 { font-family: var(--slab); font-size: clamp(1.8rem, 5.2vw, 3rem); line-height: 1.1; margin: 0 0 10px; overflow-wrap: break-word; letter-spacing: -0.01em; }
h2, h3, h4 { font-family: var(--slab); overflow-wrap: break-word; }
.lede { max-width: 780px; margin: 0 0 14px; }
.samples { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chip { border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 6px; padding: 5px 12px; font-size: 0.85rem; cursor: pointer; }
.chip:hover { border-color: var(--brass); }
.chip.on { background: var(--soft); border-color: var(--accent); color: var(--ink); font-weight: 600; }

.lanes { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }
.lane { text-align: left; border: 2px solid var(--line); background: var(--panel); border-radius: 10px; padding: 10px 14px; cursor: pointer; display: flex; flex-direction: column; gap: 2px; }
.lane b { font-family: var(--slab); font-size: 1.05rem; }
.lane span { font-size: 0.85rem; color: var(--muted); }
.lane.on { border-color: var(--accent); background: var(--soft); }

.layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 14px; align-items: start; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin: 0 0 14px; min-width: 0; }
.ph { display: flex; align-items: center; gap: 8px; margin: 0 0 10px; font-size: 1.3rem; }
.num-badge { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 6px; background: var(--cab); color: #ffffff; font-family: var(--sans); font-size: 0.9rem; font-weight: 700; flex: none; }
:root[data-theme="dark"] .num-badge { background: var(--brass); color: #101412; }
.lbl { display: block; font-size: 0.85rem; font-weight: 600; margin: 10px 0 4px; }
.row-set { border: 0; padding: 0; margin: 6px 0 0; min-width: 0; }
.row-set legend { padding: 0; }
.radio { display: inline-flex; gap: 6px; align-items: center; margin: 2px 14px 2px 0; font-size: 0.92rem; }
.drop { border: 2px dashed var(--line); border-radius: 8px; padding: 8px 10px; margin-top: 6px; text-align: center; }
.drop.over { border-color: var(--accent); background: var(--soft); }
.filelbl { color: var(--accent); text-decoration: underline; cursor: pointer; }
.secret-note { margin: 10px 0 0; padding: 7px 10px; border-left: 4px solid var(--blank); background: var(--fix-bg); border-radius: 6px; }
.flags { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 6px; }
.flags li { font-size: 0.86rem; padding: 6px 9px; border-radius: 8px; background: var(--note-bg); }
.flags li.lv-warn { background: var(--warn-bg); }
.flags li.lv-fix { background: var(--fix-bg); }
.lv { display: inline-block; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-right: 6px; color: var(--muted); }
.lv-warn .lv { color: var(--warn); }
.lv-fix .lv { color: var(--fix); }

/* The cabinet */
.cab-wrap { width: 100%; max-width: 720px; margin: 0 auto; }
.cabinet { width: 100%; height: auto; display: block; }
.cab-frame { fill: var(--cab); }
.cab-back { fill: var(--cab-back); stroke: var(--peg); stroke-width: 1; }
.rail { fill: var(--brass); }
.rail-l { fill: var(--rail-ink); font: 700 15px var(--sans); letter-spacing: 0.06em; }
.rail-e { fill: var(--rail-ink); font: italic 15px var(--serif); opacity: 0.85; }
.hook { fill: none; stroke: var(--brass); stroke-width: 3; stroke-linecap: round; }
.split { fill: none; stroke: var(--brass-hi); stroke-width: 2.4; }
.chain { stroke: var(--brass-hi); stroke-width: 2; }
.fob { stroke: var(--cab-back); stroke-width: 2; }
.fob-sel { fill: none; stroke: var(--ink); stroke-width: 3; }
.fob-t { fill: var(--fob-ink); font: 700 15px var(--sans); text-anchor: middle; pointer-events: none; }
.khead { fill: var(--brass); }
.khole { fill: var(--hole); }
.kshaft { fill: var(--brass); }
.kteeth { fill: var(--brass); }
.khead.blank, .kshaft.blank { fill: var(--cab-back); stroke: var(--brass); stroke-width: 2; stroke-dasharray: 4 3; }
.qtag { fill: var(--blank); }
.qtag-t { fill: var(--blank-ink); font: 800 13px var(--sans); text-anchor: middle; pointer-events: none; }
.ky { cursor: pointer; }
.ky-bench { cursor: default; }
.ky:hover .fob { filter: brightness(1.12); }
.f-care { fill: var(--f-care); background: var(--f-care); } .f-health { fill: var(--f-health); background: var(--f-health); }
.f-home { fill: var(--f-home); background: var(--f-home); } .f-bills { fill: var(--f-bills); background: var(--f-bills); }
.f-money { fill: var(--f-money); background: var(--f-money); } .f-papers { fill: var(--f-papers); background: var(--f-papers); }
.f-digital { fill: var(--f-digital); background: var(--f-digital); } .f-people { fill: var(--f-people); background: var(--f-people); }
.f-none { fill: var(--f-none); background: var(--f-none); }
.legend { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 6px 14px; }
.legend li { display: inline-flex; align-items: center; gap: 6px; }
.sw { display: inline-block; width: 14px; height: 14px; border-radius: 50%; flex: none; }
.sw-key { display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 4px; font-size: 0.7rem; font-weight: 800; flex: none; }
.sw-key.cut { background: var(--brass); }
.sw-key.blank { background: var(--blank); color: var(--blank-ink); }
.pickcard { margin-top: 12px; border-left: 5px solid var(--brass); background: var(--soft); border-radius: 8px; padding: 10px 12px; }
.pickcard p { margin: 0 0 5px; }
.dt-title { font-family: var(--slab); font-size: 1.1rem; font-weight: 700; }
.dt-k { display: inline-block; min-width: 7.8em; margin-right: 6px; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.dt-row.gap { color: var(--fix); }
.dt-row.gap .dt-k { color: var(--fix); }
#toLetter { margin-top: 10px; }

/* Ask + progress */
.note { background: var(--warn-bg); border-radius: 8px; padding: 6px 10px; }
.runrow { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 10px; }
.gate { background: var(--note-bg); border-radius: 8px; padding: 8px 10px; margin: 10px 0 0; }
.steps { list-style: none; padding: 0; margin: 6px 0; display: grid; gap: 3px; }
.step { color: var(--muted); font-size: 0.92rem; }
.step.active { color: var(--ink); font-weight: 600; }
.step.done { color: var(--cut); }
.step-ic { display: inline-block; width: 1.2em; font-family: var(--mono); }
.raw { white-space: pre-wrap; overflow-wrap: anywhere; font-family: var(--mono); font-size: 0.8rem; max-height: 320px; overflow: auto; background: var(--card); padding: 10px; border-radius: 8px; }

/* Result */
.res-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.res-head h2 { margin: 0; font-size: 1.45rem; }
.stamp { display: inline-block; border: 2px solid currentColor; border-radius: 4px; padding: 2px 10px; font: 700 0.85rem var(--sans); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink); }
.v-cut { color: var(--cut); }
.v-blanks { color: var(--warn); }
.v-thin { color: var(--fix); }
.v-letter { color: var(--accent); }
.summary { font-size: 1.02rem; max-width: 820px; }
.plain { padding-left: 1.2em; }
.plain li { margin: 4px 0; }
.none { color: var(--muted); font-style: italic; list-style: none; }
.hooks { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 14px; }
.hooks li { display: inline-flex; align-items: center; gap: 6px; }
.hook-b { display: inline-flex; align-items: center; gap: 6px; border: 1px dashed var(--line); background: transparent; color: var(--ink); border-radius: 8px; padding: 4px 10px; font: inherit; font-size: 0.9rem; cursor: pointer; }
.hook-b:hover, .hook-b:focus-visible { border-style: solid; background: var(--soft); }
.pickcard .pill { margin-top: 6px; }
.hinfo .note { display: block; margin-top: 4px; }
.rowlist h4 { margin: 12px 0 4px; font-size: 1rem; color: var(--muted); }
.rowlist ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.kr-b { width: 100%; text-align: left; border: 1px solid var(--line); border-left: 5px solid var(--brass); background: var(--bg); border-radius: 8px; padding: 7px 10px; cursor: pointer; display: flex; flex-direction: column; gap: 3px; }
.is-blank .kr-b { border-left-color: var(--blank); }
.kr.sel .kr-b { background: var(--soft); border-color: var(--accent); }
.kr-top { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: center; }
.kr-n { display: inline-grid; place-items: center; min-width: 24px; height: 24px; border-radius: 50%; color: var(--fob-ink); font-weight: 700; font-size: 0.8rem; padding: 0 4px; }
.kr-item { font-weight: 700; }
.kr-cat { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.kr-state { font-size: 0.75rem; font-weight: 700; border-radius: 4px; padding: 0 6px; border: 1px solid currentColor; }
.st-blank { color: var(--fix); }
.st-cut { color: var(--cut); }
.kr-move { font-size: 0.9rem; }
.recon { padding-left: 1.2em; }
.recon li { margin: 4px 0; font-size: 0.9rem; }
.recon li.warn { color: var(--warn); }
.recon li.fix { color: var(--fix); font-weight: 700; }
.exports, .cardrow { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }

/* The letter: an envelope, then the paper */
.letterbox { max-width: 760px; margin: 10px auto 4px; }
.envelope { position: relative; background: var(--env); color: var(--env-ink); border-radius: 6px; padding: 22px 70px 22px 20px; min-height: 96px; display: flex; flex-direction: column; gap: 2px; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15); overflow: hidden; }
.envelope::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 46px; background: linear-gradient(to bottom right, transparent 49.5%, rgba(0, 0, 0, 0.07) 50%) left / 50% 100% no-repeat, linear-gradient(to bottom left, transparent 49.5%, rgba(0, 0, 0, 0.07) 50%) right / 50% 100% no-repeat; pointer-events: none; }
.env-to { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; position: relative; }
.env-title { font-family: var(--serif); font-size: 1.25rem; position: relative; overflow-wrap: anywhere; }
.seal { position: absolute; right: 16px; top: 50%; width: 42px; height: 42px; margin-top: -21px; border-radius: 50%; background: radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.25), transparent 45%), var(--seal); box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.08); }
.paper { background: var(--paper); color: var(--paper-ink); margin: -6px 10px 0; padding: 22px 22px 18px 34px; border-radius: 0 0 4px 4px; box-shadow: 0 3px 8px rgba(0, 0, 0, 0.16); font-family: var(--serif); background-image: linear-gradient(to right, transparent 22px, var(--paper-rule) 22px, var(--paper-rule) 23px, transparent 23px); }
.paper p { margin: 0 0 10px; }
.salute { font-weight: 700; }
.sec-h { font-family: var(--sans); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.07em; margin: 14px 0 6px; color: #4b4637; }
.steps-l { margin: 0 0 6px; padding-left: 1.3em; }
.steps-l li { margin: 5px 0; }
.chips { display: inline-flex; gap: 3px; margin-right: 6px; vertical-align: 1px; }
.kchip { display: inline-grid; place-items: center; min-width: 20px; height: 20px; border-radius: 50%; color: #ffffff; font: 700 0.72rem var(--sans); padding: 0 3px; }
.paper .f-care { background: #b0442a; } .paper .f-health { background: #2b679a; } .paper .f-home { background: #56721c; } .paper .f-bills { background: #8a5800; }
.paper .f-money { background: #1d6a53; } .paper .f-papers { background: #6a4a93; } .paper .f-digital { background: #46536a; } .paper .f-people { background: #a3376a; } .paper .f-none { background: #6b6b6b; }
.open-b { border: 1px dashed #a3271b; border-radius: 6px; padding: 4px 12px 6px; margin: 12px 0; }
.open-b .sec-h { color: #a3271b; }
.open-b ul { margin: 0; padding-left: 1.1em; }
.closing { font-style: italic; margin-top: 12px; }

/* Kept cabinets */
.hist { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 6px; }
.hrow { display: flex; gap: 8px; align-items: center; border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.hinfo { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.hinfo b { overflow-wrap: anywhere; }

.foot { max-width: 1120px; margin: 0 auto; padding: 16px; color: var(--muted); font-size: 0.86rem; border-top: 1px solid var(--line); }
.foot a { color: var(--accent); }
.toasts { position: fixed; bottom: 14px; right: 14px; left: 14px; display: flex; flex-direction: column; align-items: flex-end; gap: 6px; pointer-events: none; z-index: 50; }
.toast { pointer-events: auto; max-width: 420px; background: var(--ink); color: var(--bg); padding: 9px 13px; border-radius: 10px; font-size: 0.9rem; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2); transition: opacity 0.5s; }
.toast.err { background: var(--fix); color: #fff; }
:root[data-theme="dark"] .toast.err { color: #1a0c0a; }
.toast a { color: inherit; font-weight: 700; }
.toast.gone { opacity: 0; }

@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 520px) {
  .lanes { grid-template-columns: 1fr; }
  .bar { gap: 8px; }
  .session { margin-left: 0; }
  .panel { padding: 12px; }
  .paper { margin: -6px 4px 0; padding: 18px 14px 14px 28px; background-image: linear-gradient(to right, transparent 18px, var(--paper-rule) 18px, var(--paper-rule) 19px, transparent 19px); }
  .envelope { padding-right: 62px; }
}
@media print {
  .bar, .lanes, .askbox, .histbox, .exports, .samples, .toasts, .notebox, .cardrow, #toLetter, .hero { display: none !important; }
  body { background: #fff; }
  .panel { border: 0; }
  .hook-add, .pickcard .pill { display: none !important; }
  .hook-b { border: 0; padding: 0; }
}