/* Pencil Comeback — an exam hall: a cover sheet, an answer sheet with bubbles, ruled paper with a red margin, a teacher's
   red pen, a chalkboard and a pencil case. Prints real test papers. */
@font-face { font-family: "Hepta Slab"; src: url("../assets/fonts/HeptaSlab-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Hepta Slab"; src: url("../assets/fonts/HeptaSlab-800.woff2") format("woff2"); font-weight: 800; font-display: swap; }
@font-face { font-family: "Hind"; src: url("../assets/fonts/Hind-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Hind"; src: url("../assets/fonts/Hind-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Hind"; src: url("../assets/fonts/Hind-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Alegreya"; src: url("../assets/fonts/Alegreya-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Alegreya"; src: url("../assets/fonts/Alegreya-400i.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Alegreya"; src: url("../assets/fonts/Alegreya-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Reenie Beanie"; src: url("../assets/fonts/ReenieBeanie-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --paper: #FFFDF7; --paper2: #F6F3EA; --rule: #D3E3F4; --margin: #E59A9A;
  --graphite: #2F3237; --lead: #5A5E64; --line: #D9D4C6;
  --yellow: #F2C14E; --yellow-d: #C99A2A; --eraser: #EE9C9C; --ferrule: #B8BCC2;
  --red: #C8372B; --blue: #2A55A5; --green: #2E7D4F;
  --board: #1E2B25; --board2: #263630; --chalk: #EDEFE8; --wood: #8E6236;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --disp: "Hepta Slab", Rockwell, Georgia, serif;
  --body: "Hind", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Alegreya", Georgia, "Times New Roman", serif;
  --hand: "Reenie Beanie", "Comic Sans MS", cursive;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--graphite); font: 400 17px/1.6 var(--body); overflow-x: hidden; }
img, svg { display: block; }
a { color: var(--blue); text-underline-offset: 3px; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
code, pre { font-family: var(--mono); }
h1, h2, h3, h4 { margin: 0; font-weight: 500; }
p { margin: 0 0 1em; }
.sprite { position: absolute; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--yellow); color: #000; padding: 8px 14px; z-index: 80; border-radius: 4px; }
.skip:focus { top: 12px; }
.lbl { display: block; font: 600 13px/1.3 var(--body); letter-spacing: .1em; text-transform: uppercase; color: var(--lead); margin: 0 0 6px; }
.msg { font-size: 15px; color: var(--green); font-weight: 600; }
.msg.err { color: var(--red); }
.btn { display: inline-flex; align-items: center; gap: 8px; background: var(--graphite); color: #fff; border: 0; border-radius: 4px; padding: 9px 16px; font-weight: 600; }
.btn:hover { background: #474B52; }
.btn svg { width: 18px; height: 18px; }
.btn-ghost { background: transparent; border: 1.5px solid var(--graphite); border-radius: 4px; padding: 7px 14px; font-weight: 600; }
.btn-ghost:hover { background: var(--paper2); }
.note { font-size: 14px; color: var(--lead); }
.print-area { display: none; }

/* ---------------------------------------------------------------- sections */
.sec { padding: 84px 24px 92px; }
.sec > * { max-width: 1180px; margin-left: auto; margin-right: auto; }
.lined { background: var(--paper) linear-gradient(90deg, transparent 0 58px, var(--margin) 58px 60px, transparent 60px); background-image: linear-gradient(90deg, transparent 0 58px, var(--margin) 58px 60px, transparent 60px), repeating-linear-gradient(180deg, transparent 0 31px, var(--rule) 31px 32px); }
.plain { background: var(--paper2); }
.q-head { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: baseline; gap: 6px 18px; border-bottom: 3px solid var(--graphite); padding-bottom: 12px; margin-bottom: 18px; }
.qn { font: 600 14px/1 var(--body); letter-spacing: .14em; text-transform: uppercase; background: var(--graphite); color: #fff; padding: 6px 10px; border-radius: 2px; }
.q-head h2 { font: 800 clamp(32px, 4.6vw, 54px)/1.05 var(--disp); }
.marks { font: 400 30px/1 var(--hand); color: var(--red); white-space: nowrap; }
.back { font: 600 13px/1 var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--graphite); text-decoration: none; border: 1.5px solid var(--graphite); border-radius: 999px; padding: 7px 12px; }
.back:hover { background: var(--yellow); }
.q-intro { max-width: 76ch; color: var(--lead); margin-bottom: 30px; }
.sec > .q-intro { margin-left: max(0px, calc((100% - 1180px) / 2)); margin-right: auto; }
.q-intro b { color: var(--graphite); }

/* ---------------------------------------------------------------- 1. the cover sheet */
.cover { background: var(--paper); padding: 46px 24px 64px; border-bottom: 1px solid var(--line); }
.cover-in { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); gap: 46px; align-items: start; }
.board { font: 600 13px/1 var(--body); letter-spacing: .16em; text-transform: uppercase; color: var(--lead); border: 2px solid var(--graphite); display: inline-block; padding: 8px 12px; margin-bottom: 22px; }
.cover h1 { font: 800 clamp(52px, 8vw, 104px)/.95 var(--disp); letter-spacing: -.01em; }
.tick { font: 500 26px/1 var(--disp); color: var(--lead); margin: 10px 0 22px; }
.pencil-bar { display: flex; height: 34px; max-width: 560px; margin-bottom: 28px; filter: drop-shadow(0 6px 8px rgba(0, 0, 0, .15)); }
.pencil-bar i { display: block; height: 100%; }
.pencil-bar .eraser { width: 34px; background: var(--eraser); border-radius: 8px 0 0 8px; }
.pencil-bar .ferrule { width: 26px; background: repeating-linear-gradient(90deg, #A6AAB0 0 4px, #D4D7DB 4px 8px); }
.pencil-bar .body { flex: 1; background: linear-gradient(180deg, #F8D77C 0 33%, var(--yellow) 33% 66%, var(--yellow-d) 66%); }
.pencil-bar .tip { width: 70px; background: linear-gradient(90deg, #E8C9A0 0 70%, var(--graphite) 70%); clip-path: polygon(0 0, 100% 50%, 0 100%); }
.boxes { display: grid; grid-template-columns: repeat(4, 1fr); border: 2px solid var(--graphite); margin-bottom: 26px; }
.box { padding: 10px 12px; border-right: 1px solid var(--graphite); }
.box:last-child { border-right: 0; }
.box span { display: block; font: 600 11.5px/1.2 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--lead); }
.box b { font: 500 18px/1.3 var(--disp); }
.instr h2 { font: 600 14px/1 var(--body); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 12px; }
.instr ol { margin: 0; padding-left: 1.3em; display: grid; gap: 8px; font-size: 17.5px; }
.instr b { font-weight: 600; }
.omr { position: relative; background: #FFFEFA; border: 2px solid var(--graphite); padding: 18px 18px 18px 36px; box-shadow: 8px 8px 0 var(--paper2), 8px 8px 0 1px var(--line); }
.omr::before { content: ""; position: absolute; left: 8px; top: 16px; bottom: 16px; width: 12px; background: repeating-linear-gradient(180deg, var(--graphite) 0 8px, transparent 8px 31px); }
.omr-head { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4px 12px; border-bottom: 2px solid var(--graphite); padding-bottom: 8px; margin-bottom: 4px; }
.omr-head b { font: 800 20px/1.1 var(--disp); }
.omr-head span { font-size: 13.5px; color: var(--lead); }
.omr-rows { list-style: none; margin: 0; padding: 0; }
.omr-rows a { display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--line); text-decoration: none; color: var(--graphite); }
.omr .no { font: 800 16px/1 var(--disp); color: var(--lead); }
.omr .what { font-weight: 500; font-size: 16px; }
.bub { display: flex; gap: 6px; }
.bub i { display: grid; place-items: center; width: 24px; height: 24px; border: 1.5px solid var(--lead); border-radius: 50%; font: 600 11px/1 var(--body); font-style: normal; color: var(--lead); transition: background .15s, color .15s; }
.omr-rows a:hover .bub i.ans, .omr-rows a:focus-visible .bub i.ans, .omr-rows a.done .bub i.ans { background: radial-gradient(circle, #3B3E44 0 55%, #2A2C30 100%); color: transparent; border-color: var(--graphite); }
.omr-rows a:hover .what { text-decoration: underline; }

/* ---------------------------------------------------------------- the exam paper (master, versions, print) */
.exam-paper { background: #fff; border: 1px solid var(--line); box-shadow: 0 18px 40px rgba(40, 36, 30, .12); padding: 34px 38px 30px; font: 400 17px/1.5 var(--serif); color: #1E1F22; }
.ep-head { border-bottom: 2px solid #1E1F22; padding-bottom: 10px; margin-bottom: 14px; }
.ep-title { font: 800 26px/1.15 var(--disp); }
.ep-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; font: 500 14.5px/1.4 var(--body); color: var(--lead); margin-top: 6px; }
.ep-meta b { color: #1E1F22; }
.ep-name { display: flex; gap: 24px; font: 400 14px/1 var(--body); color: var(--lead); margin: 12px 0 4px; }
.ep-name span { flex: 1; border-bottom: 1px solid #999; padding-bottom: 6px; }
.ep-sec { font: 600 13px/1.3 var(--body); letter-spacing: .14em; text-transform: uppercase; margin: 18px 0 8px; color: var(--lead); }
.ep-q { display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; gap: 4px 6px; margin-bottom: 14px; break-inside: avoid; }
.ep-q .n { font-weight: 700; }
.ep-q .pts { font: 500 13px/1.6 var(--body); color: var(--lead); }
.ep-opts { grid-column: 2 / -1; list-style: none; margin: 4px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 3px 18px; }
.ep-opts li { display: flex; gap: 8px; align-items: baseline; }
.ep-opts .o { display: inline-grid; place-items: center; width: 20px; height: 20px; flex: none; border: 1px solid #666; border-radius: 50%; font: 600 11px/1 var(--body); }
.ep-opts li.key .o { background: var(--green); color: #fff; border-color: var(--green); }
.ep-line { grid-column: 2 / -1; height: 26px; border-bottom: 1px solid #999; margin-top: 2px; }
.ep-line.key { border: 0; height: auto; font: 500 17px/1.3 var(--disp); color: var(--green); }
.ep-sheet-row { display: grid; grid-template-columns: 40px 1fr; align-items: center; padding: 6px 0; border-bottom: 1px dashed #ccc; font-family: var(--body); }
.ep-sheet-row .bubs { display: flex; gap: 10px; }
.ep-sheet-row .bubs i { display: inline-grid; place-items: center; width: 26px; height: 26px; border: 1.5px solid #555; border-radius: 50%; font: 600 12px/1 var(--body); font-style: normal; }
.ep-sheet-row .wline { border-bottom: 1px solid #888; height: 24px; max-width: 360px; }
.ep-keyline { display: grid; grid-template-columns: 40px 1fr auto; gap: 8px; padding: 6px 0; border-bottom: 1px dashed #ccc; font-family: var(--body); }
.ep-keyline b { font: 800 19px/1.2 var(--disp); color: var(--green); }
.ep-keyline small { color: var(--lead); }
.ep-empty { color: var(--lead); font-style: italic; }

/* ---------------------------------------------------------------- 2. write */
.w-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 34px; align-items: start; padding-left: 40px; }
.banks { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.banks button { background: #fff; border: 1.5px solid var(--graphite); border-radius: 4px; padding: 8px 14px 6px; text-align: left; line-height: 1.2; font-weight: 600; box-shadow: 3px 3px 0 var(--graphite); }
.banks button small { display: block; font-weight: 400; font-size: 13px; color: var(--lead); }
.banks button[aria-pressed="true"] { background: var(--yellow); }
.banks button:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--graphite); }
textarea { width: 100%; background: #fff; border: 1.5px solid var(--graphite); border-radius: 4px; padding: 12px 14px; font: 14px/1.55 var(--mono); color: var(--graphite); resize: vertical; }
textarea:focus, input:focus, select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(42, 85, 165, .18); }
.problems { margin: 10px 0 14px; font-size: 15px; }
.problems ul { margin: 0; padding-left: 1.2em; color: var(--red); }
.problems .ok { color: var(--green); font-weight: 600; margin: 0; }
.fmt summary { cursor: pointer; font-weight: 600; color: var(--blue); margin-bottom: 8px; }
.code { background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 12px 14px; overflow: auto; font-size: 13px; line-height: 1.55; margin: 0 0 14px; }
.sheet-col { position: sticky; top: 18px; max-height: calc(100vh - 36px); overflow: auto; }

/* ---------------------------------------------------------------- 3. versions */
.v-ctrl { display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: end; margin-bottom: 22px; }
.fld { display: grid; gap: 4px; }
.fld input, .fld select { background: #fff; border: 1.5px solid var(--graphite); border-radius: 4px; padding: 8px 12px; min-width: 120px; }
.vtabs { display: flex; gap: 6px; flex-wrap: wrap; }
.vtabs button { width: 46px; height: 46px; border-radius: 50%; border: 2px solid var(--graphite); background: #fff; font: 800 18px/1 var(--disp); }
.vtabs button[aria-pressed="true"] { background: var(--graphite); color: #fff; }
.v-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 30px; align-items: start; }
.print-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.seat-wrap { overflow-x: auto; }
.seat { border-collapse: collapse; width: 100%; font-size: 15px; background: #fff; }
.seat th, .seat td { border: 1px solid var(--line); padding: 6px 8px; text-align: center; }
.seat thead th { background: var(--graphite); color: #fff; font-weight: 600; }
.seat tbody th { background: var(--paper2); font-weight: 600; }
.seat td b { color: var(--green); }
.seat td.cur { background: #FFF4CF; }
.vkey { margin-top: 18px; background: #fff; border: 1px solid var(--line); padding: 14px 16px; }

/* ---------------------------------------------------------------- 4. report card (the coin) */
.board-sec { background: var(--board); color: var(--chalk); background-image: radial-gradient(800px 400px at 70% 20%, rgba(255, 255, 255, .05), transparent 70%); }
.board-sec .q-head { border-bottom-color: var(--chalk); }
.board-sec .qn { background: var(--chalk); color: var(--board); }
.board-sec .marks { color: #F6A49A; }
.board-sec .back { color: var(--chalk); border-color: var(--chalk); }
.board-sec .back:hover { background: rgba(255, 255, 255, .1); }
.r-grid { display: grid; grid-template-columns: minmax(280px, .75fr) minmax(0, 1.25fr); grid-template-areas: "card chalk" "pass chalk" "signs signs"; gap: 24px 30px; align-items: start; }
.card { grid-area: card; background: var(--paper); color: var(--graphite); padding: 22px 24px 18px; border-radius: 2px; box-shadow: 0 16px 30px rgba(0, 0, 0, .35); }
.card-k { font: 600 12.5px/1.3 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--lead); border-bottom: 2px solid var(--graphite); padding-bottom: 8px; }
.rc { width: 100%; border-collapse: collapse; }
.rc th, .rc td { text-align: left; padding: 7px 0; border-bottom: 1px solid var(--rule); }
.rc thead th { font: 600 12px/1 var(--body); letter-spacing: .1em; text-transform: uppercase; color: var(--lead); }
.rc tbody th { font-weight: 500; }
.rc td { text-align: right; font: 800 21px/1 var(--disp); color: var(--red); white-space: nowrap; }
.rc td sub { font-size: .6em; vertical-align: -.1em; }
.rc td.up { color: var(--green); }
.comment { font-size: 14.5px; color: var(--lead); margin: 12px 0 14px; }
.comment span { font-weight: 600; color: var(--graphite); }
.comment i { font: 400 22px/1.2 var(--hand); color: var(--blue); font-style: normal; }
.card-facts { display: grid; grid-template-columns: repeat(3, auto); justify-content: space-between; margin: 0; border-top: 2px solid var(--graphite); padding-top: 10px; }
.card-facts dt { font: 600 11.5px/1 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--lead); }
.card-facts dd { margin: 4px 0 0; font: 800 18px/1.1 var(--disp); }
.chalk { grid-area: chalk; }
.chalk-frame { position: relative; height: clamp(380px, 44vw, 560px); background: var(--board2); border: 16px solid var(--wood); border-radius: 4px; box-shadow: inset 0 0 0 2px rgba(0, 0, 0, .3), 0 18px 36px rgba(0, 0, 0, .4); }
.chalk-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.chalk-wait { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 20px; font: 400 30px/1.2 var(--hand); color: rgba(237, 239, 232, .75); background: var(--board2); transition: opacity .5s; }
.chalk-wait.off { opacity: 0; pointer-events: none; }
.chalk-cap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 16px; margin: 10px 0 0; font-size: 15px; color: #C9CFC6; }
.chalk-cap a { display: inline-flex; align-items: center; gap: 6px; color: #F7D77C; }
.chalk-cap svg { width: 16px; height: 16px; }
.pass { grid-area: pass; position: relative; background: #FFF4CF; color: var(--graphite); padding: 18px 20px 20px 30px; border-radius: 2px; transform: rotate(-1.5deg); box-shadow: 0 12px 24px rgba(0, 0, 0, .35); }
.pass::before { content: ""; position: absolute; left: 10px; top: 14px; bottom: 14px; border-left: 2px dashed #C9A845; }
.pass-k { font: 800 24px/1 var(--disp); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 10px; }
.pass-lab { font: 600 12px/1 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--lead); margin-bottom: 6px; }
.pass code { display: block; font-size: 14px; line-height: 1.45; word-break: break-all; margin-bottom: 12px; background: rgba(255, 255, 255, .6); padding: 7px 9px; }
.pass .msg { display: block; margin-top: 8px; }
.signs { grid-area: signs; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.signs a { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 2px solid rgba(237, 239, 232, .4); border-radius: 4px; color: var(--chalk); text-decoration: none; font-weight: 600; overflow-wrap: anywhere; }
.signs a:hover { border-color: var(--chalk); background: rgba(255, 255, 255, .06); }
.signs img { width: 26px; height: 26px; border-radius: 6px; object-fit: cover; flex: none; }

/* ---------------------------------------------------------------- 5. mark */
.m-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 34px; align-items: start; padding-left: 40px; }
.m-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin: 10px 0 20px; }
.review { background: #fff; border: 1.5px solid var(--red); border-radius: 4px; padding: 14px 16px; }
.review h3 { font: 400 30px/1 var(--hand); color: var(--red); margin-bottom: 8px; }
.review ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.review li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: center; font-size: 15px; border-bottom: 1px dashed var(--line); padding-bottom: 8px; }
.review li b { font-weight: 600; }
.review button { background: #fff; border: 1.5px solid var(--green); color: var(--green); border-radius: 4px; padding: 4px 10px; font-weight: 600; font-size: 14px; }
.review button:hover { background: var(--green); color: #fff; }
.review .none { color: var(--lead); margin: 0; }
.dist { background: #fff; border: 1px solid var(--line); padding: 14px 16px 10px; margin-bottom: 18px; }
.dist svg { width: 100%; height: auto; }
.dist-cap { font-size: 14px; color: var(--lead); margin: 4px 0 0; }
.res-wrap { max-height: 520px; overflow: auto; border: 1px solid var(--line); background: #fff; }
.res { width: 100%; border-collapse: collapse; font-size: 15px; }
.res th, .res td { text-align: left; padding: 7px 12px; border-bottom: 1px solid var(--rule); }
.res thead th { position: sticky; top: 0; background: var(--graphite); color: #fff; font-weight: 600; }
.res td:nth-child(3) { font: 800 16px/1 var(--disp); color: var(--red); }

/* ---------------------------------------------------------------- 6. item analysis */
.sum4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 2px solid var(--graphite); background: #fff; margin-bottom: 26px; }
.sum4 div { padding: 12px 16px; border-right: 1px solid var(--graphite); }
.sum4 div:last-child { border-right: 0; }
.sum4 span { display: block; font: 600 12px/1.2 var(--body); letter-spacing: .1em; text-transform: uppercase; color: var(--lead); }
.sum4 b { font: 800 28px/1.1 var(--disp); }
.sum4 small { display: block; font-size: 13px; color: var(--lead); }
.itemcards { list-style: none; margin: 0 auto; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; }
.ic { background: #fff; border: 1px solid var(--line); border-top: 5px solid var(--graphite); padding: 14px 16px 12px; height: 100%; }
.ic.warn { border-top-color: var(--red); }
.ic-h { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.ic-h b { font: 800 22px/1 var(--disp); }
.ic-h span { font-size: 13px; color: var(--lead); }
.ic-q { font: 400 15.5px/1.35 var(--serif); margin: 6px 0 10px; min-height: 2.7em; }
.ic-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-bottom: 10px; }
.ic-stats div { background: var(--paper2); padding: 5px 8px; border-radius: 3px; }
.ic-stats span { display: block; font: 600 11px/1 var(--body); letter-spacing: .08em; color: var(--lead); }
.ic-stats b { font: 800 18px/1.2 var(--disp); }
.ic-stats b.neg { color: var(--red); }
.opts { display: grid; gap: 4px; }
.opt { display: grid; grid-template-columns: 22px 1fr 26px; gap: 8px; align-items: center; font-size: 13.5px; }
.opt i { height: 10px; border-radius: 2px; background: #B7BAC0; font-style: normal; }
.opt.key i { background: var(--green); }
.opt b { font-weight: 600; }
.opt.key b { color: var(--green); }
.opt em { font-style: normal; text-align: right; color: var(--lead); }
.flags { margin: 8px 0 0; padding: 0; list-style: none; font: 400 23px/1.05 var(--hand); color: var(--red); }

/* ---------------------------------------------------------------- 7. matcher */
.mt-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 34px; align-items: start; padding-left: 40px; }
.try { background: #fff; border: 1.5px solid var(--graphite); padding: 18px 20px; display: grid; gap: 14px; }
.try input { width: 100%; background: #fff; border: 1.5px solid var(--graphite); border-radius: 4px; padding: 9px 12px; font-family: var(--mono); font-size: 15px; }
.verdict { display: flex; align-items: center; gap: 12px; margin: 0; font: 400 46px/1 var(--hand); }
.verdict svg { width: 40px; height: 40px; }
.verdict.right { color: var(--green); } .verdict.wrong { color: var(--red); }
.trace { margin: 0; padding-left: 1.2em; font-size: 14px; color: var(--lead); }
.trace code { color: var(--graphite); font-size: 13px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button { background: var(--paper2); border: 1px solid var(--line); border-radius: 999px; padding: 4px 11px; font-size: 13.5px; font-family: var(--mono); }
.chips button:hover { border-color: var(--graphite); }
.policy { margin: 0 0 22px; padding-left: 1.2em; display: grid; gap: 6px; }
.policy li.not { color: var(--red); }
.ho { font-size: 16px; }
.ho-t { width: 100%; border-collapse: collapse; font-size: 14.5px; background: #fff; }
.ho-t th, .ho-t td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--rule); }
.ho-t thead th { font: 600 12px/1 var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--lead); border-bottom: 2px solid var(--graphite); }
.ho-t td:nth-child(3) { color: var(--green); font-weight: 600; } .ho-t td:nth-child(4) { color: var(--red); font-weight: 600; }

/* ---------------------------------------------------------------- 8. the paper */
.xp { max-width: 940px; background: #fff; border: 1px solid var(--line); box-shadow: 0 20px 40px rgba(40, 36, 30, .12); padding: 40px 44px 30px; font: 400 18px/1.6 var(--serif); }
.xp-head { border-bottom: 3px solid var(--graphite); padding-bottom: 16px; margin-bottom: 10px; text-align: center; }
.xp-k { font: 600 12.5px/1.3 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--lead); margin-bottom: 10px; }
.xp h3 { font: 800 27px/1.2 var(--disp); margin-bottom: 10px; }
.xp-by { font-style: italic; color: var(--lead); margin: 0; }
.xq { display: grid; grid-template-columns: 40px minmax(0, 1fr) 52px; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.xq-n { font: 800 24px/1.1 var(--disp); }
.xq-m { font: 400 26px/1 var(--hand); color: var(--red); text-align: right; }
.xq h4 { font: 700 19px/1.3 var(--serif); margin-bottom: 6px; }
.xq p:last-child { margin-bottom: 0; }
.xp .nc { background: #FFF4CF; border-left: 4px solid var(--red); padding: 12px 16px; font-size: 16.5px; }
.pt { width: 100%; border-collapse: collapse; margin: 14px 0 18px; font: 400 15px/1.4 var(--body); }
.pt caption { text-align: left; font: italic 400 16px/1.4 var(--serif); padding-bottom: 8px; color: var(--lead); }
.pt th, .pt td { text-align: left; padding: 7px 10px 7px 0; border-bottom: 1px solid var(--rule); }
.pt thead th { border-bottom: 2px solid var(--graphite); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }
.refs { padding-left: 1.3em; margin: 0; font-size: 16px; }
.refs li { margin-bottom: 6px; overflow-wrap: anywhere; }
.xp-end { text-align: center; font: 600 13px/1 var(--body); letter-spacing: .16em; text-transform: uppercase; color: var(--lead); margin: 24px 0 0; }

/* ---------------------------------------------------------------- 9. stationery cupboard */
.cb-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 40px; align-items: start; padding-left: 40px; }
.cb-k { font: 800 22px/1.2 var(--disp); margin: 0 0 12px; }
.dls { display: grid; gap: 10px; margin-bottom: 26px; }
.dls a { display: grid; grid-template-columns: 22px 1fr; gap: 2px 12px; padding: 12px 16px; background: #fff; border: 1.5px solid var(--graphite); border-radius: 4px; text-decoration: none; color: var(--graphite); box-shadow: 3px 3px 0 var(--graphite); }
.dls a:hover { background: #FFF4CF; }
.dls svg { width: 20px; height: 20px; grid-row: span 2; align-self: center; }
.dls b { font-weight: 600; }
.dls small { font: 12px/1.35 var(--mono); color: var(--lead); overflow-wrap: anywhere; }
.pcase { list-style: none; margin: 0 0 28px; padding: 16px 14px; display: grid; gap: 9px; background: #2F3D63; border-radius: 10px; box-shadow: inset 0 0 0 3px #22304F; }
.pcase button { display: grid; grid-template-columns: 16px 12px minmax(0, 1fr) 30px; align-items: stretch; width: 100%; height: 40px; padding: 0; border: 0; background: none; text-align: left; filter: drop-shadow(0 3px 2px rgba(0, 0, 0, .3)); transition: transform .15s; }
.pcase button:hover, .pcase button:focus-visible { transform: translateX(8px); }
.pcase .er { background: var(--eraser); border-radius: 6px 0 0 6px; }
.pcase .fe { background: repeating-linear-gradient(90deg, #A6AAB0 0 3px, #D4D7DB 3px 6px); }
.pcase .bd { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 0 12px; background: linear-gradient(180deg, #F8D77C 0 33%, var(--yellow) 33% 66%, var(--yellow-d) 66%); color: #2A2620; overflow: hidden; }
.pcase .bd b { font-weight: 600; font-size: 14.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pcase .bd small { font: 11.5px/1 var(--mono); color: #5C4B1E; white-space: nowrap; }
.pcase .tp { background: linear-gradient(90deg, #E8C9A0 0 65%, var(--graphite) 65%); clip-path: polygon(0 0, 100% 50%, 0 100%); }
.syl { margin: 0; padding-left: 1.3em; display: grid; gap: 8px; }
.syl code { font-weight: 600; font-size: 14px; overflow-wrap: anywhere; }
.syl p { margin: 2px 0 0; font-size: 15px; color: var(--lead); }
.viewer { margin-top: 30px; background: #fff; border: 1.5px solid var(--graphite); border-radius: 4px; }
.viewer-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.viewer-bar span { flex: 1; font: 12px/1.4 var(--mono); color: var(--lead); overflow-wrap: anywhere; }
.viewer-body { max-height: 560px; overflow: auto; }
.lines { margin: 0; padding: 12px 0; font-size: 13px; line-height: 1.55; counter-reset: ln; }
.lines span { display: block; padding: 0 16px 0 64px; position: relative; white-space: pre-wrap; overflow-wrap: anywhere; }
.lines span::before { counter-increment: ln; content: counter(ln); position: absolute; left: 0; width: 48px; text-align: right; color: #A9A497; }
.md { padding: 18px 24px; max-width: 82ch; }
.md h1, .md h2, .md h3 { font: 800 24px/1.25 var(--disp); margin: 22px 0 10px; }
.md h2 { font-size: 21px; } .md h3 { font-size: 18px; }
.md pre { background: var(--paper2); padding: 12px 14px; border-radius: 4px; overflow: auto; font-size: 13px; }
.md code { font-size: .9em; }
.md table { border-collapse: collapse; margin: 10px 0 16px; font-size: 14px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; }

/* ---------------------------------------------------------------- 10. pens down */
.pens { background: var(--graphite); color: #EDEBE4; padding: 70px 24px 84px; }
.pens-in { max-width: 900px; margin: 0 auto; text-align: center; }
.pens-big { font: 400 92px/1 var(--hand); color: #fff; margin-bottom: 6px; }
.pens-sub { font: 500 18px/1.4 var(--disp); color: #C9C6BC; margin-bottom: 20px; }
.pens-facts { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 34px; margin: 0 0 24px; }
.pens-facts dt { font: 600 11.5px/1 var(--body); letter-spacing: .12em; text-transform: uppercase; color: #A9A69C; }
.pens-facts dd { margin: 4px 0 0; font: 800 18px/1.1 var(--disp); }
.pens-k { font: 600 12.5px/1 var(--body); letter-spacing: .16em; text-transform: uppercase; color: #A9A69C; margin-bottom: 10px; }
.pens-links { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; font-weight: 600; }
.pens-links a { color: #F7D77C; }
.pens-note { font-size: 14px; color: #A9A69C; max-width: 70ch; margin: 0 auto; }

/* ---------------------------------------------------------------- narrow screens */
@media (max-width: 980px) {
  .cover-in, .w-grid, .v-grid, .m-grid, .mt-grid, .cb-grid { grid-template-columns: minmax(0, 1fr); }
  .sheet-col { position: static; max-height: none; }
  .r-grid { grid-template-columns: minmax(0, 1fr); grid-template-areas: "card" "chalk" "pass" "signs"; }
  .pass { transform: none; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .sec { padding: 60px 16px 70px; }
  .cover { padding: 30px 16px 48px; }
  .lined { background-image: linear-gradient(90deg, transparent 0 8px, var(--margin) 8px 10px, transparent 10px), repeating-linear-gradient(180deg, transparent 0 31px, var(--rule) 31px 32px); }
  .q-head { grid-template-columns: minmax(0, 1fr) auto; }
  .q-head .qn { justify-self: start; }
  .q-head h2 { grid-column: 1 / -1; }
  .marks { font-size: 24px; }
  .boxes { grid-template-columns: repeat(2, 1fr); }
  .box:nth-child(2) { border-right: 0; } .box:nth-child(-n+2) { border-bottom: 1px solid var(--graphite); }
  .pencil-bar { height: 26px; }
  .omr { padding: 14px 12px 14px 30px; }
  .omr .what { font-size: 15px; }
  .bub i { width: 20px; height: 20px; font-size: 10px; }
  .w-grid, .m-grid, .mt-grid, .cb-grid { padding-left: 6px; }
  .exam-paper { padding: 22px 16px; font-size: 16px; }
  .ep-opts { grid-template-columns: minmax(0, 1fr); }
  .sum4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sum4 div:nth-child(2) { border-right: 0; } .sum4 div:nth-child(-n+2) { border-bottom: 1px solid var(--graphite); }
  .xp { padding: 24px 16px; font-size: 16.5px; }
  .xq { grid-template-columns: 30px minmax(0, 1fr); }
  .xq-m { grid-column: 2; text-align: left; }
  .pt { display: block; overflow-x: auto; font-size: 13.5px; }
  .chalk-frame { height: 400px; border-width: 10px; }
  .pens-big { font-size: 70px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bub i, .pcase button { transition: none; }
}
@media print {
  .site, .skip { display: none !important; }
  .print-area { display: block !important; }
  body { background: #fff; }
  .print-area .exam-paper { box-shadow: none; border: 0; padding: 0; }
}