/* Cali Builds Atoms. Colours are the site's own (styles.css --m10-* tokens). */
:root {
	--ca-ink: #1a1a1a;
	--ca-muted: #444746;
	--ca-line: #e6e6e6;
	--ca-band: #d8e6fc;
	--ca-panel: #caddf6;
	--ca-orange: #ee6600;
	--ca-orange-hover: #ff7a1a;
	--ca-orange-text: #9a4200;
	--ca-orange-soft: #fff1e6;
	--ca-orange-deep: #c45000;
	--ca-blue: #006699;
	--ca-blue-strong: #004d73;
	--ca-blue-soft: #e6f0f8;
	--ca-lime: #b2df5d;
	--ca-lime-soft: #edf8da;
	--ca-good-text: #2e5e12;
	--ca-answer: #1f5bb8;
	--ca-answer-soft: #e3ecfa;
	--ca-wrong: #b3261e;
	--ca-wrong-soft: #fbe4e1;
	--ca-font: Onest, Verdana, system-ui, -apple-system, "Segoe UI", sans-serif;
}

html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: #fff; color: var(--ca-ink); font: 16px/1.4 var(--ca-font); }
*, *::before, *::after { box-sizing: border-box; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; }
[hidden] { display: none !important; }

.ca-app { position: relative; max-width: 1040px; margin: 0 auto; padding: 0 0 8px; }
.ca-app :focus-visible { outline: 3px solid var(--ca-orange); outline-offset: 2px; }
.ca-main { outline: none; }
.ca-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }

/* ---------- header band ---------- */
.ca-top { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 8px; min-height: 52px; padding: 4px 6px; border-radius: 12px; background: var(--ca-band); }
.ca-title { flex: 1 1 auto; min-width: 0; padding-left: 6px; font-weight: 700; font-size: 19px; }
.ca-stats { order: 3; flex: 1 1 100%; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; padding: 0 6px 4px; font-size: 16px; }
.ca-stats:empty { display: none; }
.ca-sound { order: 2; }
.ca-iconbtn { display: inline-flex; align-items: center; justify-content: center; flex: none; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 10px; background: transparent; color: var(--ca-blue); }
.ca-iconbtn:hover { background: var(--ca-panel); }
.ca-iconbtn svg { width: 26px; height: 26px; }
.ca-score { position: relative; }
.ca-timer { font-variant-numeric: tabular-nums; font-weight: 600; }
.ca-float { position: absolute; left: 100%; top: -6px; margin-left: 6px; color: var(--ca-good-text); font-weight: 700; font-size: 18px; animation: ca-float 1s ease-out forwards; }
@keyframes ca-float { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-22px); } }
@media (min-width: 700px) {
	.ca-stats { order: 1; flex: 0 1 auto; padding: 0 4px; }
	.ca-sound { order: 2; }
}

/* ---------- buttons ---------- */
.ca-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 9px 20px; border: 2px solid transparent; border-radius: 10px; font-weight: 600; font-size: 17px; line-height: 1.2; }
.ca-primary { background: var(--ca-orange); color: var(--ca-ink); }
.ca-primary:hover:not(:disabled) { background: var(--ca-orange-hover); }
.ca-btn-quiet { background: #fff; border-color: var(--ca-blue); color: var(--ca-blue); }
.ca-btn-quiet:hover:not(:disabled) { background: var(--ca-blue-soft); }
.ca-btn:disabled { opacity: .45; }
.ca-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }

/* ---------- home ---------- */
.ca-home { display: grid; gap: 18px; padding: 16px 0 4px; }
.ca-hero { display: flex; align-items: flex-end; justify-content: center; gap: 8px; }
.ca-hero-atom { width: min(250px, 62%); }
.ca-hero-atom svg { display: block; width: 100%; height: auto; overflow: visible; }
.ca-hero .ca-cali-big { width: min(130px, 30%); }
.ca-home-btns { display: grid; gap: 12px; }
@media (min-width: 560px) { .ca-home-btns { grid-template-columns: 1fr 1fr; } }
.ca-big { display: grid; gap: 6px; align-content: start; padding: 16px 18px; border: 2px solid var(--ca-orange); border-radius: 16px; background: var(--ca-orange-soft); text-align: left; }
.ca-big:hover { background: #ffe3cc; }
.ca-big-t { color: var(--ca-orange-text); font-weight: 700; font-size: 26px; }
.ca-big-d { font-size: 16px; }
.ca-big-game { border-color: var(--ca-blue); background: var(--ca-blue-soft); }
.ca-big-game:hover { background: #d3e6f4; }
.ca-big-game .ca-big-t { color: var(--ca-blue-strong); }
.ca-cali-big svg, .ca-cali svg { display: block; width: 100%; height: auto; }

/* ---------- atom area and builder ---------- */
.ca-atomwrap { width: 100%; max-width: 520px; min-width: min(320px, 100%); margin: 0 auto; aspect-ratio: 1 / 1; border: 2px solid var(--ca-band); border-radius: 16px; background: radial-gradient(circle at 50% 50%, #fff 0%, #f6f9fe 70%, #eef4fc 100%); touch-action: none; transition: border-color .15s, background-color .15s; }
.ca-atomwrap.is-static { max-width: 440px; touch-action: auto; }
@media (max-width: 699px) { .ca-atomwrap.is-static { max-width: 320px; } }
.ca-atomwrap.is-drop { border-color: var(--ca-orange); box-shadow: 0 0 0 3px var(--ca-orange-soft); }
.ca-atomwrap.is-out { border-color: var(--ca-wrong); border-style: dashed; }
.ca-atom-svg { display: block; width: 100%; height: 100%; overflow: visible; touch-action: none; -webkit-user-select: none; user-select: none; }
.is-static .ca-atom-svg { touch-action: auto; }
.ca-pt { transition: transform .2s ease; }
.ca-builder .ca-pt { cursor: grab; }
.ca-builder.is-locked .ca-pt { cursor: default; }
.ca-shaky { animation: ca-vib .125s linear infinite; }
@keyframes ca-vib {
	0% { transform: translate(0, 0); }
	25% { transform: translate(2px, -1px); }
	50% { transform: translate(-1px, 2px); }
	75% { transform: translate(-2px, -1px); }
	100% { transform: translate(0, 0); }
}
.ca-note { margin-top: 4px; color: var(--ca-muted); font-size: 16px; text-align: center; }
.ca-model { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 4px 16px; margin-top: 6px; }
.ca-model-label { font-weight: 600; }
.ca-model label { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; cursor: pointer; }
.ca-model input { width: 20px; height: 20px; margin: 0; accent-color: var(--ca-orange); }

.ca-bins { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 8px; }
.ca-bincol { display: grid; gap: 6px; }
.ca-bin { position: relative; display: flex; flex-direction: column; align-items: center; gap: 2px; width: 100%; padding: 6px 4px 8px; border: 2px solid var(--ca-panel); border-radius: 14px; background: #f7f7f7; cursor: grab; touch-action: none; -webkit-user-select: none; user-select: none; }
.ca-bin:hover:not(:disabled) { border-color: var(--ca-blue); background: var(--ca-blue-soft); }
.ca-bin-svg { display: block; width: 100%; max-width: 130px; height: auto; pointer-events: none; }
.ca-tray { fill: #fff; stroke: var(--ca-band); stroke-width: 2; }
.ca-bin-label { font-weight: 600; font-size: 16px; }
.ca-max { display: none; position: absolute; top: 4px; right: 4px; padding: 0 8px; border-radius: 999px; background: var(--ca-muted); color: #fff; font-weight: 600; font-size: 16px; line-height: 24px; }
.is-full .ca-max { display: block; }
.is-full .ca-bin { cursor: not-allowed; }
.is-full .ca-bin-svg { opacity: .45; filter: grayscale(.8); }
.ca-builder.is-locked .ca-bin { cursor: default; }
.ca-ctr { display: flex; align-items: center; justify-content: center; gap: 4px; }
.ca-step { width: 44px; height: 44px; padding: 0; border: 2px solid var(--ca-blue); border-radius: 10px; background: #fff; color: var(--ca-blue); font-weight: 700; font-size: 24px; line-height: 1; touch-action: manipulation; }
.ca-step:hover:not(:disabled) { background: var(--ca-blue-soft); }
.ca-step:disabled { opacity: .35; }
.ca-count { min-width: 1.8em; text-align: center; font-weight: 700; font-size: 24px; font-variant-numeric: tabular-nums; }
@media (max-width: 479px) {
	.ca-ctr { display: grid; grid-template-columns: 44px 44px; justify-content: center; gap: 2px 4px; }
	.ca-count { grid-column: 1 / -1; order: -1; }
}
.ca-bincol.is-wrong .ca-bin { border: 3px solid var(--ca-wrong); background: var(--ca-wrong-soft); }
.ca-bincol.is-wrong .ca-count { color: var(--ca-wrong); }
.ca-builder.is-answer .ca-atomwrap { border-color: var(--ca-answer); box-shadow: 0 0 0 3px var(--ca-answer-soft); }
.ca-builder.is-answer .ca-count { color: var(--ca-answer); }
.ca-buildfoot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 10px; }
.ca-help { color: var(--ca-muted); font-size: 16px; }
.ca-reset { flex: none; margin-left: auto; }

.ca-ghost { position: fixed; left: 0; top: 0; z-index: 60; pointer-events: none; filter: drop-shadow(0 3px 4px rgba(0, 0, 0, .3)); }
.ca-ghost.is-leaving { transition: left .25s ease, top .25s ease, opacity .25s ease; }

/* ---------- Build screen ---------- */
.ca-buildgrid { display: grid; gap: 16px; margin-top: 12px; }
@media (min-width: 700px) {
	.ca-buildgrid { grid-template-columns: minmax(290px, 1fr) minmax(350px, 390px); align-items: start; }
}
.ca-info { display: grid; gap: 12px; align-content: start; }
.ca-card { border: 2px solid var(--ca-band); border-radius: 12px; background: #fff; overflow: hidden; }
.ca-card-h { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 2px 4px 2px 12px; background: var(--ca-band); }
.ca-card-t { margin: 0; font-weight: 700; font-size: 17px; }
.ca-eye { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 10px; background: transparent; color: var(--ca-blue); }
.ca-eye:hover { background: var(--ca-panel); }
.ca-eye svg { width: 24px; height: 24px; }
.ca-card-b { padding: 10px 8px; }
.ca-card-note { display: none; padding: 12px; color: var(--ca-muted); font-size: 16px; }
.ca-card.is-hidden .ca-card-b { display: none; }
.ca-card.is-hidden .ca-card-note { display: block; }
.ca-elname { margin-top: 8px; font-weight: 600; font-size: 18px; text-align: center; }
.ca-symwrap { display: flex; justify-content: center; align-items: center; min-height: 100px; }
.ca-facts { display: grid; gap: 6px; margin: 0; }
.ca-facts div { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 12px; padding: 4px 4px; border-bottom: 1px solid var(--ca-line); }
.ca-facts dt { color: var(--ca-muted); }
.ca-facts dd { margin: 0; font-weight: 700; font-size: 18px; font-variant-numeric: tabular-nums; }
.ca-word { margin-left: 8px; font-weight: 400; font-size: 16px; color: var(--ca-muted); }
.ca-stab { margin-top: 10px; padding: 8px 10px; border-radius: 8px; background: #f7f7f7; font-weight: 600; }
.ca-stab.is-stable { background: var(--ca-lime-soft); color: var(--ca-good-text); }
.ca-stab.is-unstable { background: var(--ca-orange-soft); color: var(--ca-orange-text); }

/* ---------- mini periodic table ---------- */
.ca-pt { display: grid; gap: 3px; }
.ca-pt-row { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 3px; }
.ca-pt-cell { position: relative; display: flex; align-items: center; justify-content: center; min-height: 40px; aspect-ratio: 1 / 1; border: 1px solid var(--ca-panel); border-radius: 6px; background: #f7faff; -webkit-user-select: none; user-select: none; }
.ca-pt-z { position: absolute; top: 1px; left: 4px; font-size: 12px; line-height: 1.2; color: var(--ca-muted); }
.ca-pt-s { padding-top: 6px; font-weight: 700; font-size: 18px; }
.ca-pt-cell.is-current { border-color: var(--ca-orange-deep); background: var(--ca-orange-deep); color: #fff; }
.ca-pt-cell.is-current .ca-pt-z { color: #fff; }
.ca-pt-input .ca-pt-cell { cursor: pointer; }
.ca-pt-input .ca-pt-cell:hover { background: var(--ca-blue-soft); }
.ca-pt-cell.is-selected { box-shadow: inset 0 0 0 3px var(--ca-blue); border-color: var(--ca-blue); }
.ca-pt-cell.is-wrong { box-shadow: inset 0 0 0 3px var(--ca-wrong); border-color: var(--ca-wrong); background: var(--ca-wrong-soft); }
.ca-pt-cell.is-answer, .ca-pt-input .ca-pt-cell.is-answer:hover { border-color: var(--ca-answer); background: var(--ca-answer); color: #fff; box-shadow: none; }
.ca-pt-cell.is-answer .ca-pt-z { color: #fff; }
.ca-pt.is-locked .ca-pt-cell { cursor: default; }
.ca-pt.is-locked .ca-pt-cell:not(.is-answer):not(.is-wrong):hover { background: #f7faff; }
.ca-pt-cell:focus-visible { z-index: 1; }
@media (max-width: 420px) {
	.ca-pt, .ca-pt-row { gap: 2px; }
	.ca-card-b { padding: 8px 4px; }
}
@media (pointer: coarse) {
	.ca-pt-input .ca-pt-cell { min-height: 44px; }
}

/* ---------- nuclide symbol ---------- */
.ca-nuclide { display: inline-grid; grid-template-columns: auto auto auto; grid-template-rows: auto auto; align-items: center; line-height: 1; font-variant-numeric: tabular-nums; }
.ca-nA, .ca-nZ, .ca-nq { font-size: 22px; font-weight: 600; }
.ca-nA { grid-column: 1; grid-row: 1; align-self: start; text-align: right; color: var(--ca-orange-text); }
.ca-nZ { grid-column: 1; grid-row: 2; align-self: end; text-align: right; color: var(--ca-blue); }
.ca-nX { grid-column: 2; grid-row: 1 / span 2; padding: 0 4px; font-weight: 700; font-size: 56px; }
.ca-nq { grid-column: 3; grid-row: 1; align-self: start; min-width: .8em; color: #722838; }
.ca-nuclide.is-big .ca-nX { font-size: 72px; }
.ca-nuclide.is-big .ca-nA, .ca-nuclide.is-big .ca-nZ, .ca-nuclide.is-big .ca-nq { font-size: 28px; }
.ca-nuclide.is-none .ca-nX { color: #8b8f94; font-weight: 400; }
.ca-nuclide.is-empty { display: flex; align-items: center; justify-content: center; min-width: 64px; min-height: 64px; border: 2px dashed var(--ca-panel); border-radius: 10px; color: var(--ca-muted); font-size: 28px; }

/* ---------- level select ---------- */
.ca-screen-t { margin: 14px 0 12px; font-weight: 700; font-size: 21px; }
.ca-levels { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.ca-lvcard { display: grid; gap: 4px; align-content: start; padding: 14px 16px; border: 2px solid var(--ca-band); border-radius: 14px; background: #fff; text-align: left; }
.ca-lvcard:hover { border-color: var(--ca-blue); background: var(--ca-blue-soft); }
.ca-lv-n { color: var(--ca-blue); font-weight: 600; }
.ca-lv-name { font-weight: 700; font-size: 20px; }
.ca-lv-best { color: var(--ca-muted); }
.ca-stars { display: inline-flex; gap: 2px; font-size: 24px; line-height: 1; }
.ca-stars .on { color: #e8a200; }
.ca-stars .off { color: #d5dbe2; }
.ca-stars.is-big { font-size: 44px; }
.ca-switch { position: relative; display: inline-flex; align-items: center; gap: 10px; min-height: 44px; margin-top: 14px; font-weight: 600; font-size: 17px; cursor: pointer; }
.ca-switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.ca-switch-ui { position: relative; width: 48px; height: 28px; border-radius: 999px; background: #b9c0c7; transition: background-color .15s; }
.ca-switch-ui::after { content: ""; position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .3); transition: transform .15s; }
.ca-switch input:checked + .ca-switch-ui { background: var(--ca-orange); }
.ca-switch input:checked + .ca-switch-ui::after { transform: translateX(20px); }
.ca-switch input:focus-visible + .ca-switch-ui { outline: 3px solid var(--ca-orange); outline-offset: 2px; }

/* ---------- a challenge ---------- */
.ca-play { display: grid; gap: 14px; margin-top: 12px; grid-template-columns: minmax(0, 1fr); grid-template-areas: "task" "work" "fb"; }
.ca-task { grid-area: task; min-width: 0; }
.ca-work { grid-area: work; min-width: 0; }
.ca-fbwrap { grid-area: fb; min-width: 0; }
@media (min-width: 700px) {
	.ca-play { grid-template-columns: minmax(290px, 1fr) minmax(350px, 1fr); grid-template-rows: auto 1fr; grid-template-areas: "task work" "task fb"; align-items: start; }
	.ca-play-3 { grid-template-columns: minmax(330px, 1.25fr) minmax(260px, 1fr); grid-template-areas: "work task" "work fb"; }
}
.ca-prompt { margin: 0 0 10px; font-weight: 600; font-size: 18px; }
.ca-given { margin: 10px 0 0; padding: 8px 10px; border-radius: 10px; background: var(--ca-blue-soft); font-weight: 600; font-size: 18px; text-align: center; }
.ca-target { display: flex; justify-content: center; padding: 18px 10px; border: 2px solid var(--ca-orange); border-radius: 14px; background: var(--ca-orange-soft); }
.ca-spins { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.ca-spins-4 { margin-top: 14px; }
.ca-spin { display: grid; justify-items: center; align-content: start; gap: 4px; min-width: 100px; padding: 8px; border: 2px solid var(--ca-band); border-radius: 12px; background: #fff; }
.ca-spin-l { font-weight: 600; font-size: 16px; text-align: center; }
.ca-spin-b { width: 60px; height: 44px; padding: 0; border: 2px solid var(--ca-blue); border-radius: 10px; background: #fff; color: var(--ca-blue); font-size: 20px; line-height: 1; touch-action: manipulation; -webkit-user-select: none; user-select: none; }
.ca-spin-b:hover:not(:disabled) { background: var(--ca-blue-soft); }
.ca-spin-b:disabled { opacity: .35; }
.ca-spin-v { width: 76px; height: 50px; border: 2px solid #8b8f94; border-radius: 10px; background: #fff; text-align: center; font-weight: 700; font-size: 24px; font-variant-numeric: tabular-nums; }
.ca-spin.is-wrong { border: 3px solid var(--ca-wrong); background: var(--ca-wrong-soft); }
.ca-spin.is-answer .ca-spin-v { border-color: var(--ca-answer); background: var(--ca-answer-soft); color: var(--ca-answer); }
.ca-previewbox { display: grid; justify-items: center; align-content: start; gap: 8px; min-width: 110px; padding: 8px; }
.ca-preview .ca-nuclide .ca-nX { font-size: 48px; }

.ca-fb { display: flex; align-items: center; gap: 10px; min-height: 66px; padding: 8px 12px; border: 2px solid var(--ca-line); border-radius: 12px; background: #f7f7f7; }
.ca-cali { flex: none; width: 50px; }
.ca-msg { font-weight: 600; font-size: 17px; }
.ca-fb.is-good { border-color: var(--ca-lime); background: var(--ca-lime-soft); color: var(--ca-good-text); }
.ca-fb.is-bad { border-color: var(--ca-wrong); background: var(--ca-wrong-soft); color: var(--ca-wrong); }
.ca-fb.is-info { border-color: var(--ca-answer); background: var(--ca-answer-soft); color: var(--ca-answer); }
.ca-fb.shake { animation: ca-shake .2s linear; }
@keyframes ca-shake {
	0%, 100% { transform: translateX(0); }
	20% { transform: translateX(-6px); }
	40% { transform: translateX(6px); }
	60% { transform: translateX(-4px); }
	80% { transform: translateX(4px); }
}

/* ---------- results ---------- */
.ca-results { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 28px; padding: 18px 0 8px; }
.ca-results .ca-cali-big { width: 150px; }
.ca-res-body { display: grid; justify-items: start; gap: 8px; }
.ca-res-body .ca-screen-t { margin: 0; }
.ca-res-score { font-size: 22px; }
.ca-res-time { font-size: 18px; font-variant-numeric: tabular-nums; }
.ca-newrec { padding: 6px 14px; border-radius: 999px; background: var(--ca-lime); font-weight: 700; font-size: 18px; }

/* ---------- leave dialog ---------- */
.ca-overlay { position: absolute; inset: 0; z-index: 20; display: flex; justify-content: center; align-items: flex-start; padding: 64px 12px 12px; background: rgba(255, 255, 255, .78); }
.ca-dialog { max-width: 440px; padding: 16px 20px; border: 2px solid var(--ca-blue); border-radius: 14px; background: #fff; box-shadow: 0 8px 24px rgba(26, 31, 39, .18); }
.ca-dialog p { margin: 0; font-weight: 600; font-size: 18px; }

@media (prefers-reduced-motion: reduce) {
	.ca-pt, .ca-atomwrap, .ca-switch-ui, .ca-switch-ui::after { transition: none; }
	.ca-shaky, .ca-fb.shake, .ca-float { animation: none; }
	.ca-float { opacity: 0; }
}