/* MathsPath — exercise-book clarity, mastery squares as the signature */
:root {
  --paper: #F6F8FB; --card: #FFFFFF; --ink: #1D2B4F; --ink-2: #4E5B78; --ink-3: #7D88A1; --line: #DDE3EC;
  --blue: #2B59C3; --blue-2: #1E44A0; --blue-soft: #E8EEFB; --green: #2E8B6A; --red: #C8433A; --red-soft: #FBEAE8;
  --amber: #E8A93A; --l0: #E3E8EC; --l1: #F6C9A8; --l2: #F2D16B; --l3: #7CC4A0; --l4: #2E8B6A;
  --font: "Lexend", system-ui, -apple-system, "Segoe UI", sans-serif;
  --r: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 16px/1.55 var(--font); color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; font-weight: 600; letter-spacing: -0.015em; }
h1 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.05rem; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 2px; }
p { margin: 0 0 .8em; }
:focus-visible { outline: 3px solid #F2B640; outline-offset: 2px; }
[hidden] { display: none !important; }
.muted { color: var(--ink-2); } .faint { color: var(--ink-3); } .small { font-size: .88rem; }
.err { background: var(--red-soft); color: #8E241D; border-left: 4px solid var(--red); padding: .6em .9em; border-radius: 6px; }
.ok-msg { background: #E7F4EE; border-left: 4px solid var(--green); padding: .6em .9em; border-radius: 6px; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.stack { display: grid; gap: .9rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } }
label { display: grid; gap: .3rem; font-weight: 500; font-size: .93rem; }
label.check { display: flex; gap: .55rem; align-items: flex-start; font-weight: 400; }
label.check input { margin-top: .3em; width: 1.05em; height: 1.05em; accent-color: var(--blue); }
input, select, textarea { font: inherit; color: var(--ink); background: #fff; border: 1.5px solid #C9D2DF; border-radius: 9px; padding: .55em .7em; min-width: 0; width: 100%; }
input[type=checkbox], input[type=radio] { width: auto; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(43,89,195,.18); }
textarea { resize: vertical; }

.btn { --b: #fff; --t: var(--ink); --bd: #C9D2DF; display: inline-flex; align-items: center; justify-content: center; gap: .45em;
  font: 600 .95rem var(--font); padding: .55em 1.05em; border-radius: 10px; border: 1.5px solid var(--bd); background: var(--b);
  color: var(--t); cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { --bd: var(--ink-3); }
.btn.primary { --b: var(--blue); --t: #fff; --bd: var(--blue); }
.btn.primary:hover { --b: var(--blue-2); --bd: var(--blue-2); }
.btn.go { --b: var(--green); --t: #fff; --bd: var(--green); }
.btn.danger { --b: transparent; --t: var(--red); --bd: transparent; }
.btn.danger:hover { --b: var(--red-soft); }
.btn.ghost { --b: transparent; --bd: transparent; --t: var(--blue); }
.btn.ghost:hover { --b: var(--blue-soft); }
.btn.big { padding: .75em 1.4em; font-size: 1.05rem; }
.btn.small { padding: .3em .7em; font-size: .84rem; }
.btn:disabled { opacity: .5; cursor: default; }
.linkbtn { background: none; border: 0; font: inherit; color: inherit; cursor: pointer; padding: 0; }

/* top bar */
.top { background: var(--ink); color: #fff; }
.top-in { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; gap: 1.6rem; padding: .7rem clamp(16px, 3vw, 28px); flex-wrap: wrap; }
.brand { display: flex; gap: .55rem; align-items: center; color: #fff; text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.brand i { display: grid; grid-template-columns: repeat(2, 9px); gap: 3px; }
.brand i b { width: 9px; height: 9px; border-radius: 2.5px; }
.top nav { display: flex; gap: 1.2rem; flex: 1; flex-wrap: wrap; }
.top nav a, .top .linkbtn { color: #C3CCE0; text-decoration: none; font-weight: 500; }
.top nav a:hover, .top nav a[aria-current] { color: #fff; }
.top nav a[aria-current] { box-shadow: inset 0 -2px 0 #F2B640; }
.top .me { display: flex; gap: 1rem; align-items: center; color: #C3CCE0; font-size: .9rem; }
.pill { display: inline-flex; gap: .35em; align-items: center; font-size: .82rem; font-weight: 600; padding: .15em .65em; border-radius: 99px; background: var(--blue-soft); color: var(--blue-2); white-space: nowrap; }
.top .pill { background: rgba(255,255,255,.12); color: #fff; }
.pill.warn { background: #FCF1DC; color: #8A5B00; } .pill.bad { background: var(--red-soft); color: #8E241D; } .pill.good { background: #E1F2EA; color: #1F6B50; }
.flash { max-width: 1200px; margin: 1rem auto 0; padding: 0 clamp(16px, 3vw, 28px); }
.flash div { padding: .7rem 1rem; border-radius: 10px; background: #E7F4EE; border-left: 4px solid var(--green); }
.flash .err { background: var(--red-soft); border-left-color: var(--red); }

.wrap { max-width: 1200px; margin: 0 auto; padding: clamp(20px, 3vw, 36px) clamp(16px, 3vw, 28px) 64px; }
.narrow { max-width: 480px; margin: 0 auto; padding: clamp(28px, 6vw, 64px) 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 1.2rem 1.3rem; }
.card + .card { margin-top: 1rem; }
.head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.head h1 { margin: 0; }
.crumbs { font-size: .88rem; color: var(--ink-3); margin-bottom: .4rem; }
.crumbs a { color: var(--ink-2); }
.cols { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 1.6rem; align-items: start; }
@media (max-width: 900px) { .cols { grid-template-columns: 1fr; } }
.tabs { display: flex; gap: .3rem; border-bottom: 1.5px solid var(--line); margin-bottom: 1.2rem; overflow-x: auto; }
.tabs a { padding: .6rem .9rem; text-decoration: none; color: var(--ink-2); font-weight: 500; border-bottom: 3px solid transparent; margin-bottom: -1.5px; white-space: nowrap; }
.tabs a[aria-current] { color: var(--ink); border-bottom-color: var(--blue); }
table.t { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.t th, .t td { padding: .6rem .75rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
.t th { font-size: .82rem; font-weight: 600; color: var(--ink-2); background: #FAFBFD; }
.t tr:last-child td { border-bottom: 0; }
.empty { padding: 1.4rem; color: var(--ink-2); background: #fff; border: 1.5px dashed var(--line); border-radius: var(--r); }

/* mastery squares (the signature) */
.sq { display: inline-block; width: 14px; height: 14px; border-radius: 4px; background: var(--l0); vertical-align: middle; flex: none; }
.sq.l1 { background: var(--l1); } .sq.l2 { background: var(--l2); } .sq.l3 { background: var(--l3); } .sq.l4 { background: var(--l4); }
.sq.l4 { box-shadow: inset 0 0 0 2px rgba(255,255,255,.55); }
.squares { display: flex; flex-wrap: wrap; gap: 4px; }
.legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: .82rem; color: var(--ink-2); }
.legend span { display: inline-flex; gap: .4rem; align-items: center; }
.bar { height: 10px; border-radius: 99px; background: var(--l0); overflow: hidden; display: flex; }
.bar i { display: block; height: 100%; }

/* landing */
.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 3rem; align-items: center; max-width: 1200px; margin: 0 auto; padding: clamp(32px, 7vw, 88px) clamp(16px, 3vw, 28px); }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; letter-spacing: -0.03em; }
.hero .lede { font-size: 1.15rem; color: var(--ink-2); max-width: 34rem; }
.hero-grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 7px; }
.hero-grid b { aspect-ratio: 1; border-radius: 7px; background: var(--l0); animation: fillin .5s ease-out both; }
@keyframes fillin { from { transform: scale(.4); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .hero-grid b { animation: none; } }
@media (max-width: 800px) { .hero { grid-template-columns: 1fr; } }

/* courses & skills */
.course-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; }
.course-tile { display: grid; gap: .5rem; padding: 1.1rem 1.2rem; background: #fff; border: 1px solid var(--line); border-radius: var(--r); text-decoration: none; color: var(--ink); }
.course-tile:hover { border-color: var(--blue); }
.course-tile b { font-size: 1.05rem; }
.unit { background: #fff; border: 1px solid var(--line); border-radius: var(--r); margin-bottom: 1rem; }
.unit-h { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.unit-h h2 { margin: 0; font-size: 1.15rem; }
.skills { list-style: none; margin: 0; padding: .4rem 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.skills a { display: flex; gap: .7rem; align-items: flex-start; padding: .55rem 1.2rem; text-decoration: none; color: var(--ink); border-radius: 8px; }
.skills a .sq { margin-top: .3rem; }
.skills .sk { display: grid; line-height: 1.3; }
.skills a:hover { background: var(--blue-soft); }
.skills small { color: var(--ink-3); font-size: .78rem; }
.level-badge { display: inline-flex; gap: .5rem; align-items: center; font-weight: 600; }

/* worksheet cards & question cards */
.ws-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.ws-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; text-decoration: none; color: var(--ink); display: grid; }
.ws-card:hover { border-color: var(--blue); }
.ws-card .thumb { aspect-ratio: 4/3; background: #EEF1F5 center top / cover no-repeat; border-bottom: 1px solid var(--line); }
.ws-card .meta { padding: .7rem .85rem; display: grid; gap: .3rem; }
.ws-card .meta b { font-size: .97rem; }
.qimg { max-width: 100%; display: block; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.qlist { display: grid; gap: 1rem; }
.qcard { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 1rem; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 1.2rem; }
.qcard.published { border-left: 5px solid var(--green); }
.qcard.lowconf { border-left: 5px solid var(--amber); }
@media (max-width: 900px) { .qcard { grid-template-columns: 1fr; } }
.qcard .fields { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem .8rem; align-content: start; }
.qcard .fields .full { grid-column: 1 / -1; }
.qcard textarea { font-size: .9rem; }
.math-prev { font-size: .92rem; background: #FAFBFD; border: 1px dashed var(--line); border-radius: 8px; padding: .5rem .7rem; min-height: 2rem; overflow-x: auto; }
.chips { display: flex; gap: .35rem; flex-wrap: wrap; }
.tagline { display: flex; gap: .4rem; flex-wrap: wrap; font-size: .8rem; }
.tagline span { background: #F0F3F8; color: var(--ink-2); padding: .1em .55em; border-radius: 6px; }
.progress-box { text-align: center; padding: 3rem 1rem; }
.spinner { width: 46px; height: 46px; margin: 0 auto 1rem; border-radius: 10px; background: var(--l2); animation: spin 1.6s infinite ease-in-out; }
@keyframes spin { 0% { transform: rotate(0); background: var(--l1); } 50% { transform: rotate(180deg); background: var(--l3); } 100% { transform: rotate(360deg); background: var(--l1); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

/* crop editor */
.crop-dlg { border: 0; border-radius: 14px; padding: 0; width: min(960px, 96vw); max-height: 94vh; }
.crop-dlg::backdrop { background: rgba(20,28,48,.55); }
.crop-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .8rem 1rem; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.crop-body { overflow: auto; max-height: calc(94vh - 120px); background: #EEF1F5; padding: 12px; }
.crop-page { position: relative; margin: 0 auto 12px; width: 100%; max-width: 860px; user-select: none; }
.crop-page img { width: 100%; display: block; box-shadow: 0 2px 10px rgba(0,0,0,.12); }
.crop-page .pn { position: absolute; left: -2px; top: -2px; background: var(--ink); color: #fff; font-size: .75rem; padding: 2px 7px; border-radius: 0 0 6px 0; }
.box { position: absolute; border: 2.5px solid var(--blue); background: rgba(43,89,195,.10); cursor: move; touch-action: none; }
.box .h { position: absolute; width: 16px; height: 16px; background: var(--blue); border: 2px solid #fff; border-radius: 4px; touch-action: none; }
.box .h.tl { left: -9px; top: -9px; cursor: nwse-resize; } .box .h.br { right: -9px; bottom: -9px; cursor: nwse-resize; }
.box .h.tr { right: -9px; top: -9px; cursor: nesw-resize; } .box .h.bl { left: -9px; bottom: -9px; cursor: nesw-resize; }
.box .x { position: absolute; right: 4px; top: 4px; background: #fff; border: 1px solid var(--line); border-radius: 6px; cursor: pointer; font-size: .8rem; padding: 0 .4rem; }
.box .n { position: absolute; left: 4px; top: 4px; background: var(--blue); color: #fff; font-size: .75rem; padding: 0 .4rem; border-radius: 4px; }

/* runner */
.runner { max-width: 860px; margin: 0 auto; }
.run-top { display: flex; gap: 1rem; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 1rem; }
.dots { display: flex; gap: 6px; flex-wrap: wrap; }
.dots button { width: 30px; height: 30px; border-radius: 8px; border: 1.5px solid #C9D2DF; background: #fff; font: 600 .8rem var(--font); color: var(--ink-2); cursor: pointer; }
.dots button.cur { border-color: var(--blue); color: var(--blue); box-shadow: 0 0 0 2px rgba(43,89,195,.2); }
.dots button.ok { background: var(--l3); border-color: var(--l3); color: #0E3D2C; }
.dots button.no { background: var(--red-soft); border-color: #EBB3AE; color: #8E241D; }
.dots button.saved { background: var(--blue-soft); border-color: #B9C9F0; color: var(--blue-2); }
.dots button.pending { background: #FCF1DC; border-color: #F1D49B; }
.qbox { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: clamp(1rem, 3vw, 1.6rem); }
.qmeta { display: flex; gap: .4rem; flex-wrap: wrap; margin-bottom: .9rem; }
.qtext { font-size: 1.05rem; overflow-x: auto; padding: .35em 0; }
.qtext img { max-width: 100%; }
.answer-row { display: flex; gap: .6rem; margin-top: 1.2rem; flex-wrap: wrap; align-items: stretch; }
.answer-row input { flex: 1 1 220px; font-size: 1.15rem; padding: .65em .8em; }
.mkeys { display: flex; gap: 4px; flex-wrap: wrap; margin-top: .5rem; }
.mkeys button { min-width: 38px; height: 34px; border-radius: 8px; border: 1px solid var(--line); background: #F7F9FC; font: 500 1rem var(--font); cursor: pointer; }
.choices { display: grid; gap: .5rem; margin-top: 1rem; }
.choices button { text-align: left; display: flex; gap: .8rem; align-items: center; padding: .7rem .9rem; border-radius: 10px; border: 1.5px solid #C9D2DF; background: #fff; font: inherit; cursor: pointer; }
.choices button b { width: 28px; height: 28px; border-radius: 7px; display: grid; place-items: center; background: #EEF2F8; flex: none; }
.choices button.sel { border-color: var(--blue); background: var(--blue-soft); }
.result { margin-top: 1rem; padding: .8rem 1rem; border-radius: 10px; font-weight: 600; display: flex; gap: .6rem; align-items: center; }
.result.ok { background: #E1F2EA; color: #1F6B50; } .result.no { background: var(--red-soft); color: #8E241D; } .result.info { background: var(--blue-soft); color: var(--blue-2); }
.helpbox { margin-top: 1rem; padding: .9rem 1rem; border-radius: 10px; background: #FAFBFD; border: 1px solid var(--line); }
.helpbox h3 { font-size: .9rem; color: var(--ink-2); margin-bottom: .3rem; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 1.2rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 1.1rem; }
.timer.low { color: var(--red); }
.summary { text-align: center; padding: 2rem 1rem; }
.summary .big { font-size: 3rem; font-weight: 700; letter-spacing: -0.03em; }
.lvl-change { display: inline-flex; gap: .7rem; align-items: center; font-size: 1.1rem; font-weight: 600; margin: .6rem 0; }
.steps { list-style: none; padding: 0; margin: .5rem 0 0; display: grid; gap: .3rem; }
.steps li { display: flex; gap: .5rem; } .steps li::before { content: "✓"; color: var(--green); font-weight: 700; } .steps li.bad::before { content: "✗"; color: var(--red); }
.photos { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .6rem; } .photos img { height: 90px; border-radius: 6px; border: 1px solid var(--line); }

/* class grid */
.mgrid { overflow-x: auto; }
.mgrid table { border-collapse: separate; border-spacing: 3px; }
.mgrid th { font-size: .75rem; font-weight: 500; color: var(--ink-2); text-align: left; max-width: 120px; vertical-align: bottom; padding: 4px; }
.mgrid th.rot { height: 140px; white-space: nowrap; }
.mgrid th.rot div { transform: rotate(-55deg); transform-origin: left bottom; width: 26px; translate: 14px -6px; }
.mgrid td.name { white-space: nowrap; padding-right: .8rem; font-size: .9rem; }
.mgrid td.c { width: 30px; height: 26px; border-radius: 5px; background: var(--l0); }
.cell-ok { background: #E1F2EA !important; } .cell-no { background: var(--red-soft) !important; } .cell-part { background: #FCF1DC !important; } .cell-wait { background: var(--blue-soft) !important; }
.logins { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.slip { border: 1.5px dashed #A9B4C7; border-radius: 10px; padding: .8rem 1rem; background: #fff; break-inside: avoid; }
.slip b { display: block; font-size: 1.05rem; } .slip code { font-size: 1rem; }
@media print { .top, .noprint, .flash { display: none !important; } body { background: #fff; } .wrap { padding: 0; } }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: #F0F3F8; padding: .05em .35em; border-radius: 5px; }
.katex { font-size: 1.05em; }

/* revision */
.grade-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; }
.grade-tile { --c: var(--blue); position: relative; display: grid; gap: .15rem; padding: 1.1rem 1.1rem 1rem; min-height: 132px; align-content: end;
  background: #fff; border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--ink); overflow: hidden; }
.grade-tile::before { content: ""; position: absolute; left: 0; top: 0; right: 0; height: 6px; background: var(--c); }
.grade-tile.g-dp { --c: var(--green); }
.grade-tile:hover { border-color: var(--c); box-shadow: 0 6px 18px rgba(29,43,79,.08); }
.grade-tile .gname { font-size: 1.6rem; font-weight: 700; letter-spacing: -.02em; }
.grade-tile .gsub { font-size: .8rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }
.grade-tile .gcount { font-size: .85rem; color: var(--ink-2); margin-top: .35rem; }
.seg { display: flex; gap: .3rem; flex-wrap: wrap; }
.seg a { padding: .35em .85em; border-radius: 99px; border: 1.5px solid #C9D2DF; text-decoration: none; color: var(--ink-2); font-weight: 500; font-size: .9rem; background: #fff; }
.seg.small a { font-size: .8rem; padding: .2em .7em; }
.seg a[aria-current] { background: var(--ink); border-color: var(--ink); color: #fff; }
.rgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: .8rem; }
.rgrid.pad { padding: 1rem 1.2rem; }
.rcard { display: flex; gap: .8rem; align-items: stretch; background: #fff; border: 1px solid var(--line); border-radius: var(--r); text-decoration: none; color: var(--ink); overflow: hidden; position: relative; }
.rcard:hover { border-color: var(--blue); }
.rcard.draft { opacity: .7; border-style: dashed; }
.rcard-k { width: 6px; flex: none; background: var(--ink-3); }
.k-builder { background: var(--blue); } .k-html { background: #8A55C9; } .k-file { background: var(--amber); } .k-video { background: var(--red); } .k-link { background: var(--ink-3); }
.rcard-b { display: grid; gap: .3rem; padding: .8rem .9rem .85rem 0; flex: 1; min-width: 0; }
.rcard-b b { font-size: .98rem; line-height: 1.3; }
.rcard-b small { color: var(--ink-3); font-size: .8rem; line-height: 1.35; }
.rcard .tick { position: absolute; right: .6rem; top: .55rem; width: 24px; height: 24px; border-radius: 7px; background: var(--l3); color: #0E3D2C; display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.rcard.done { background: #F6FBF8; }
.rk { font-size: .7rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; padding: .12em .5em; border-radius: 5px; background: #EEF1F5; color: var(--ink-2); }
.rk-builder { background: var(--blue-soft); color: var(--blue-2); } .rk-html { background: #F1E9FA; color: #5E2F99; } .rk-file { background: #FCF1DC; color: #8A5B00; } .rk-video { background: var(--red-soft); color: #8E241D; }
.lv { font-size: .72rem; font-weight: 600; padding: .12em .55em; border-radius: 5px; }
.lv1 { background: #E1F2EA; color: #1F6B50; } .lv2 { background: #FCF1DC; color: #8A5B00; } .lv3 { background: var(--red-soft); color: #8E241D; }
.lvh { margin: 1.6rem 0 .7rem; font-size: 1rem; } .lvh .lv { font-size: .9rem; padding: .25em .8em; }
.rdot { width: 14px; height: 14px; border-radius: 50%; border: 2px solid #C9D2DF; flex: none; margin-top: .3rem; }
.rdot.some { border-color: var(--blue); } .rdot.full { border-color: var(--green); background: var(--green); }
.wrap.wide { max-width: 1500px; }
.viewer-bar { display: flex; justify-content: space-between; gap: 1rem; align-items: center; flex-wrap: wrap; padding: .6rem .9rem; background: #fff; border: 1px solid var(--line); border-bottom: 0; border-radius: var(--r) var(--r) 0 0; }
.docframe, .htmlframe { width: 100%; height: 80vh; min-height: 480px; border: 1px solid var(--line); border-radius: 0 0 var(--r) var(--r); background: #fff; display: block; resize: vertical; }
.htmlwrap:fullscreen { background: #fff; display: flex; flex-direction: column; }
.htmlwrap:fullscreen .htmlframe { flex: 1; height: auto; border-radius: 0; }
.vid { position: relative; aspect-ratio: 16/9; background: #000; border-radius: var(--r); overflow: hidden; }
.vid iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.rs-bar { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; position: sticky; top: 0; z-index: 2; background: var(--paper); padding: .6rem 0; }
.rs-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.rs-q { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: clamp(1rem, 2.5vw, 1.4rem); }
.rs-q[data-status=ok] { border-left: 5px solid var(--l3); } .rs-q[data-status=again] { border-left: 5px solid var(--amber); }
.rs-h { display: flex; gap: .5rem; align-items: center; margin-bottom: .6rem; }
.rs-num { width: 30px; height: 30px; border-radius: 8px; background: var(--ink); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: .9rem; }
.rs-st { margin-left: auto; }
.rs-btns { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: 1rem; }
.rs-btns .btn.on { --b: var(--blue-soft); --bd: var(--blue); --t: var(--blue-2); }
.helpbox.sol { background: #FFFDF6; border-color: #F1E2B5; }
.rs-check { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-top: 1rem; padding-top: .8rem; border-top: 1px dashed var(--line); }
.rs-check .btn.warn-on { --b: #FCF1DC; --bd: var(--amber); --t: #8A5B00; }
.kinds { border: 1px solid var(--line); display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .6rem; }
.kinds legend { font-weight: 600; padding: 0 .3rem; }
.kind { display: flex; gap: .6rem; align-items: flex-start; padding: .75rem .85rem; border: 1.5px solid var(--line); border-radius: 10px; cursor: pointer; font-weight: 400; }
.kind:has(input:checked) { border-color: var(--blue); background: var(--blue-soft); }
.kind:has(input:disabled) { opacity: .45; cursor: default; }
.kind input { margin-top: .3em; }
.kind span { display: grid; gap: .2rem; } .kind small { color: var(--ink-2); font-size: .8rem; line-height: 1.35; }
.lbl { display: block; font-weight: 500; font-size: .93rem; margin-bottom: .4rem; }
.chipbox { padding: .35em .75em; border: 1.5px solid #C9D2DF; border-radius: 99px; background: #fff; align-items: center !important; }
.chipbox:has(input:checked) { border-color: var(--blue); background: var(--blue-soft); }
.chipbox input { margin-top: 0 !important; }
.bq-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.bq { display: grid; gap: .7rem; padding: 1rem; border: 1px solid var(--line); border-radius: 12px; background: #FAFBFD; }
.bq-img img { max-height: 160px; max-width: 100%; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.home-rev { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: .5rem; }
.home-rev a { display: grid; place-items: center; padding: .8rem .3rem; border-radius: 10px; background: #fff; border: 1px solid var(--line); text-decoration: none; color: var(--ink); font-weight: 600; text-align: center; border-top: 4px solid var(--blue); }
.home-rev a.dp { border-top-color: var(--green); }
.home-rev a:hover { border-color: var(--blue); }
@media (max-width: 640px) { .home-rev { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.pastezone { border: 2px dashed #B9C9F0; background: var(--blue-soft); border-radius: 12px; padding: 1rem 1.1rem; }
.pastezone.over { border-color: var(--blue); background: #DCE6FB; }
kbd { font: 600 .8em var(--font); background: #fff; border: 1px solid #C9D2DF; border-bottom-width: 2px; border-radius: 5px; padding: .05em .4em; }
.bq-status { color: var(--blue-2); font-weight: 500; } .bq-status.err { padding: .4em .7em; }
.qdots { display: flex; gap: 3px; flex-wrap: wrap; max-width: 260px; }
.qdots i, .qd { display: inline-block; width: 12px; height: 12px; border-radius: 3px; background: var(--l0); }
.qdots i.ok, .qd.ok { background: var(--l3); } .qdots i.again, .qd.again { background: var(--amber); }
.importbox { border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.1rem; background: #fff; }