/* Tools page on the live site: calculators, lexicon and the analyzer placeholder, in Nocturne's palette. */
.tools-page { --card: #0c0c0f; --card-2: #121216; --hover: #1a1a20; --line-3: rgba(255,255,255,.2); --accent-ink: #0b0a12;
  --mono: 'IBM Plex Mono', monospace; --sans: var(--font); --up: #3ddc97; --down: #ff5c6c; --r-lg: 20px; --bg: #050506; padding-bottom: 40px; }
.tools-page .up { color: var(--up); } .tools-page .down { color: var(--down); }
.tools-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: -20px 0 90px; }
.tools-tabs a { display: inline-flex; align-items: center; gap: 10px; padding: 11px 18px; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(255,255,255,.02); font-size: 14.5px; color: var(--text); transition: border-color .25s, background-color .25s; }
.tools-tabs a span { font: 500 10.5px var(--mono); color: var(--faint); }
.tools-tabs a small { font: 500 10.5px var(--mono); color: var(--accent); padding: 2px 7px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 12%, transparent); }
.tools-tabs a:hover { border-color: color-mix(in srgb, var(--accent) 50%, transparent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
.tools-block { padding-bottom: 120px; scroll-margin-top: 100px; }
.tools-block-head { display: grid; gap: 14px; margin-bottom: 30px; max-width: 720px; }
.tools-block-head h2 { font-size: clamp(34px, 4.2vw, 60px); letter-spacing: -.05em; line-height: 1; }
.tools-block-head p { max-width: 560px; }
.tools-page .tl-card, .tools-page .analyzer-card { background: linear-gradient(180deg, #0d0d10, #070708); box-shadow: inset 0 1px 0 rgba(255,255,255,.04); }
.tools-page .tl-card h2 { letter-spacing: -.035em; }
.tools-page .lx-bar { top: 84px; background: #030304; }
.tools-page .lx-item dd, .tools-page .at-fine { color: var(--muted); }

.analyzer-card { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 40px; align-items: center; padding: clamp(28px, 4vw, 56px); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.analyzer-card::before { content: ''; position: absolute; inset: 0; background: radial-gradient(60% 80% at 85% 50%, color-mix(in srgb, var(--aura-1) 22%, transparent), transparent 70%); pointer-events: none; }
.analyzer-copy { position: relative; display: grid; gap: 16px; justify-items: start; }
.analyzer-copy h2 { font-size: clamp(44px, 6vw, 88px); letter-spacing: -.055em; line-height: .95; }
.analyzer-copy p { max-width: 420px; }
.soon-badge { display: inline-flex; align-items: center; gap: 9px; padding: 9px 14px; border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); border-radius: 999px; font: 500 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.soon-badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.motion-ok .soon-badge i { animation: soon-pulse 2s ease-in-out infinite; }
@keyframes soon-pulse { 50% { opacity: .25; transform: scale(.7); } }
.analyzer-visual { position: relative; display: flex; align-items: flex-end; gap: 4px; height: 200px; filter: blur(.4px); -webkit-mask-image: linear-gradient(90deg, #000 40%, transparent); mask-image: linear-gradient(90deg, #000 40%, transparent); }
.analyzer-visual i { flex: 1; height: calc(var(--h) * 100%); border-radius: 3px 3px 1px 1px; background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 70%, transparent), color-mix(in srgb, var(--accent) 8%, transparent)); opacity: .55; }
.motion-ok .analyzer-visual i { animation: soon-bar 3.2s ease-in-out infinite; animation-delay: calc(var(--k) * -90ms); transform-origin: bottom; }
@keyframes soon-bar { 50% { transform: scaleY(.55); } }
@media (max-width: 900px) { .analyzer-card { grid-template-columns: 1fr; } .analyzer-visual { height: 120px; } }
@media (max-width: 640px) { .tools-page .lx-bar { top: 72px; } .tools-tabs { margin-bottom: 60px; } .tools-block { padding-bottom: 90px; } }

/* ---------- Tools ---------- */
.tl-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.tl-card { display: flex; flex-direction: column; gap: 22px; padding: 28px; border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--card); scroll-margin-top: 20px; }
.tl-card:hover { border-color: var(--line-strong); }
.tl-wide { grid-column: 1 / -1; }
.tl-card header { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; align-items: baseline; }
.tl-n { grid-row: span 2; font: 500 11px var(--mono); padding: 4px 7px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); }
.tl-card h2 { font-size: 24px; font-weight: 500; letter-spacing: -.025em; line-height: 1.1; }
.tl-card header p { font-size: 14px; color: var(--muted); }
.tl-body { display: grid; gap: 20px; }
.tl-wide .tl-body { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
.tl-wide .tl-bars, .tl-wide .tl-cap { grid-column: 1 / -1; }
.tl-inputs { display: grid; gap: 16px; }
.tl-field { display: grid; gap: 8px; }
.tl-label { font: 500 10.5px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.tl-input { display: flex; align-items: center; height: 46px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg); transition: border-color .2s; }
.tl-input:focus-within { border-color: var(--accent); }
.tl-input input { flex: 1; min-width: 0; background: none; border: 0; outline: none; color: var(--text); font: 500 18px var(--sans); font-variant-numeric: tabular-nums; -moz-appearance: textfield; }
.tl-input input::-webkit-inner-spin-button { -webkit-appearance: none; }
.tl-input em { font: 500 11px var(--mono); color: var(--faint); text-transform: uppercase; }
.tl-field input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 18px; background: none; margin: 0; cursor: pointer; }
.tl-field input[type=range]::-webkit-slider-runnable-track { height: 2px; background: var(--line-strong); border-radius: 2px; }
.tl-field input[type=range]::-moz-range-track { height: 2px; background: var(--line-strong); border-radius: 2px; }
.tl-field input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; margin-top: -7px; border-radius: 50%; background: var(--accent); border: 3px solid var(--card); box-shadow: 0 0 0 1px var(--accent); }
.tl-field input[type=range]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); border: 3px solid var(--card); }
.tl-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.tl-chips button { display: grid; gap: 1px; padding: 7px 11px; border: 1px solid var(--line-strong); border-radius: 10px; font-size: 13.5px; font-weight: 600; text-align: left; transition: all .2s; }
.tl-chips small { font: 500 10px var(--mono); color: var(--faint); }
.tl-chips button:hover { border-color: var(--line-3); }
.tl-chips button[aria-pressed=true] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.tl-chips button[aria-pressed=true] small { color: rgba(13,18,0,.6); }
.tl-outs { display: flex; flex-wrap: wrap; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.tl-out { flex: 1 1 110px; display: grid; gap: 8px; padding: 14px 16px; background: var(--bg); align-content: start; }
.tl-out strong { font-size: 20px; font-weight: 500; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.tl-hero { flex-basis: 100%; padding: 18px 16px; }
.tl-hero strong { font-size: clamp(36px, 4vw, 52px); letter-spacing: -.045em; line-height: 1; color: var(--accent); }
.tl-hero strong.up { color: var(--up); } .tl-hero strong.down { color: var(--down); }
.tl-hero strong.tl-zero { color: var(--down); }
.tl-split { display: flex; height: 8px; border-radius: 99px; overflow: hidden; gap: 2px; }
.tl-split i { background: var(--up); transition: flex .4s var(--ease-out); } .tl-split i + i { background: var(--down); }
.tl-bars { display: flex; align-items: flex-end; gap: 4px; height: 170px; }
.tl-bars i { position: relative; flex: 1; height: calc(var(--h) * 100%); min-height: 2px; border-radius: 4px 4px 1px 1px; background: var(--hover); transition: height .45s var(--ease-out), background-color .2s; }
.tl-bars i.on { background: var(--accent); }
.tl-bars i:hover { background: var(--line-3); }
.tl-bars i b { position: absolute; left: 0; right: 0; bottom: -20px; text-align: center; font: 500 10px var(--mono); color: var(--faint); }
.tl-bars i.on b { color: var(--accent); }
.tl-bars i:hover::after { content: attr(data-tip); position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%); white-space: nowrap; font: 500 11px/1 var(--mono); padding: 7px 9px; border-radius: 8px; background: var(--hover); border: 1px solid var(--line-strong); z-index: 5; }
.tl-cap { font-size: 13px; color: var(--muted); margin-top: 18px; }
.tl-curve { width: 100%; height: 140px; overflow: visible; }
.tl-curve-line { fill: none; stroke: var(--accent); stroke-width: 1.8; vector-effect: non-scaling-stroke; }
.tl-curve-dot { fill: var(--bg); stroke: var(--accent); stroke-width: 2; vector-effect: non-scaling-stroke; }
.at-fine { margin-top: 18px; font-size: 13px; color: var(--faint); max-width: 70ch; }

/* ---------- Lexicon ---------- */
.lx-bar { position: sticky; top: 0; z-index: 10; display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; padding: 14px 0; margin-bottom: 8px; background: var(--bg); border-bottom: 1px solid var(--line); }
.lx-search { display: flex; align-items: center; gap: 10px; height: 44px; padding: 0 14px; min-width: 260px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--card); color: var(--faint); transition: border-color .2s; }
.lx-search:focus-within { border-color: var(--accent); color: var(--accent); }
.lx-search svg { width: 16px; height: 16px; }
.lx-search input { flex: 1; background: none; border: 0; outline: none; color: var(--text); font: 400 15px var(--sans); }
.lx-letters { display: flex; flex-wrap: wrap; gap: 2px; }
.lx-letters a { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 7px; font: 500 12px var(--mono); color: var(--muted); transition: all .2s; }
.lx-letters a:hover { background: var(--accent); color: var(--accent-ink); }
.lx-count { margin-left: auto; font: 500 11px var(--mono); color: var(--faint); text-transform: uppercase; }
.lx-item { display: grid; grid-template-columns: minmax(180px, 280px) minmax(0, 1fr); gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 90px; transition: background-color .2s; }
.lx-item:hover dt { color: var(--accent); }
.lx-item dt { display: flex; align-items: baseline; gap: 12px; font-size: 20px; font-weight: 500; letter-spacing: -.02em; transition: color .2s; }
.lx-letter { width: 18px; font: 500 11px var(--mono); color: var(--faint); scroll-margin-top: 90px; }
.lx-item dd { font-size: 16px; line-height: 1.65; color: #bdbdba; max-width: 64ch; }
.lx-link { display: block; margin-top: 8px; font-size: 13px; color: var(--muted); }
.lx-link:hover { color: var(--accent); }
.lx-empty { padding: 40px 0; color: var(--muted); }

@media (max-width: 1180px) {
  .tl-grid { grid-template-columns: 1fr; } .tl-wide .tl-body { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .lx-item { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 640px) {
  .tl-card, .at-quote { padding: 20px; }
  .lx-search { min-width: 0; flex: 1; }
  .lx-count { display: none; }
  .tl-bars { gap: 2px; }
  .tl-bars i b { font-size: 8px; }
}
.tools-page .tl-chips button { background: transparent; color: var(--text); border-color: var(--line-strong); box-shadow: none; }
.tools-page .tl-chips button:hover { border-color: var(--line-3); background: rgba(255,255,255,.03); }
.tools-page .tl-chips button[aria-pressed=true] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.tools-page .tl-chips button small { color: var(--faint); }
.tools-page .tl-chips button[aria-pressed=true] small { color: rgba(11,10,18,.6); }
.tools-page dl, .tools-page dd, .tools-page ol, .tools-page ul { margin: 0; padding: 0; }

/* ---------- Lexicon as drawers ---------- */
.tools-page .lx-bar { gap: 12px 16px; }
.lx-toggle { height: 44px; padding: 0 18px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; color: var(--text); font-size: 14px; cursor: pointer; transition: border-color .2s, background-color .2s; }
.lx-toggle:hover { border-color: color-mix(in srgb, var(--accent) 50%, transparent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
.lx-groups { display: grid; gap: 10px; margin-top: 14px; }
.lx-cat { border: 1px solid var(--line); border-radius: var(--r-lg); background: linear-gradient(180deg, #0d0d10, #070708); overflow: hidden; transition: border-color .3s; }
.lx-cat:hover, .lx-cat[open] { border-color: var(--line-strong); }
.lx-cat summary { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto auto; align-items: center; gap: 18px; padding: 22px 24px; cursor: pointer; list-style: none; -webkit-user-select: none; user-select: none; }
.lx-cat summary::-webkit-details-marker { display: none; }
.lx-cat-n { font: 500 11px var(--mono); color: var(--faint); }
.lx-cat-name { display: grid; gap: 3px; min-width: 0; }
.lx-cat-name b { font-size: clamp(20px, 2vw, 26px); font-weight: 500; letter-spacing: -.03em; color: var(--text); }
.lx-cat-name small { font-size: 13.5px; color: var(--muted); }
.lx-cat-peek { font-size: 13px; color: var(--faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 32ch; transition: opacity .3s; }
.lx-cat[open] .lx-cat-peek { opacity: 0; }
.lx-cat-count { font: 500 11px var(--mono); color: var(--accent); padding: 4px 9px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 12%, transparent); }
.lx-chev { width: 30px; height: 30px; border: 1px solid var(--line-strong); border-radius: 50%; position: relative; transition: transform .4s var(--ease-out), border-color .2s; }
.lx-chev::before, .lx-chev::after { content: ""; position: absolute; left: 50%; top: 50%; width: 10px; height: 1.5px; margin: -.75px 0 0 -5px; background: var(--text); border-radius: 2px; transition: transform .4s var(--ease-out); }
.lx-chev::after { transform: rotate(90deg); }
.lx-cat[open] .lx-chev { transform: rotate(180deg); border-color: var(--accent); }
.lx-cat[open] .lx-chev::after { transform: rotate(0deg); }
.lx-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin: 0; background: var(--line); border-top: 1px solid var(--line); }
.tools-page .lx-grid .lx-item { display: grid; grid-template-columns: 1fr; gap: 8px; padding: 20px 24px; border: 0; background: #09090b; }
.lx-grid .lx-item:nth-last-child(1):nth-child(odd) { grid-column: 1 / -1; }
.lx-grid .lx-item dt { font-size: 18px; font-weight: 500; letter-spacing: -.02em; color: var(--text); }
.lx-grid .lx-item dd { font-size: 15px; line-height: 1.6; }
.motion-ok .lx-cat[open] .lx-grid { animation: lx-open .45s var(--ease-out); }
@keyframes lx-open { from { opacity: 0; transform: translateY(-6px); } }

/* ---------- Formulas ---------- */
.fx-groups { display: grid; gap: 44px; }
.fx-group > header { display: flex; align-items: baseline; gap: 14px; margin-bottom: 14px; }
.fx-group h3 { font-size: 22px; font-weight: 500; letter-spacing: -.02em; }
.fx-group header p { font-size: 14px; color: var(--muted); }
.fx-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 10px; align-items: start; }
.fx-card { border: 1px solid var(--line); border-radius: var(--r-lg); background: linear-gradient(180deg, #0d0d10, #070708); transition: border-color .3s; }
.fx-card:hover, .fx-card[open] { border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.fx-card summary { display: grid; grid-template-columns: auto 1fr auto; grid-template-areas: "n name more" "fx fx fx"; gap: 14px 12px; align-items: center; padding: 20px 22px; cursor: pointer; list-style: none; -webkit-user-select: none; user-select: none; }
.fx-card summary::-webkit-details-marker { display: none; }
.fx-n { grid-area: n; font: 500 10.5px var(--mono); padding: 3px 7px; border-radius: 6px; background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.fx-name { grid-area: name; font-size: 16px; font-weight: 500; letter-spacing: -.01em; }
.fx-more { grid-area: more; font: 500 10.5px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--faint); transition: color .2s; }
.fx-card:hover .fx-more, .fx-card[open] .fx-more { color: var(--accent); }
.fx-card[open] .fx-more::after { content: " \00D7"; }
.fx-formula { grid-area: fx; display: block; white-space: nowrap; line-height: 2.2; min-height: 64px; padding: 14px 16px; border-radius: 12px; background: #050506; border: 1px solid var(--line); font: 400 clamp(17px, 1.6vw, 20px)/1.2 var(--font); letter-spacing: 0; color: var(--text); overflow-x: auto; }
.fx-formula var, .fx-body var { font-style: italic; color: #d9d3ff; }
.fx-formula sub { font-size: .6em; color: var(--muted); }
.fx-frac { display: inline-flex; flex-direction: column; align-items: center; vertical-align: middle; font-size: .88em; margin: 0 .15em; }
.fx-frac > span { padding: 0 .25em; white-space: nowrap; }
.fx-frac > span:first-child { border-bottom: 1.5px solid currentColor; padding-bottom: .12em; }
.fx-frac > span:last-child { padding-top: .12em; }
.fx-bar { display: inline-block; border-top: 1.5px solid currentColor; line-height: 1.1; padding-top: .05em; }
.fx-sqrt { display: inline-flex; align-items: flex-start; }
.fx-sqrt > span { border-top: 1.5px solid currentColor; padding: .05em .1em 0; margin-left: .05em; }
.fx-body { display: grid; gap: 14px; padding: 0 22px 22px; }
.motion-ok .fx-card[open] .fx-body { animation: lx-open .4s var(--ease-out); }
.fx-why { font-size: 14.5px; line-height: 1.6; color: #c4c4cc; }
.fx-vars { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.fx-vars div { display: grid; grid-template-columns: 90px 1fr; gap: 12px; padding: 9px 12px; background: #09090b; font-size: 13.5px; }
.fx-vars dt { font: italic 500 13px var(--font); color: #d9d3ff; }
.fx-vars dd { color: var(--muted); }
.fx-ex { display: grid; gap: 4px; font-size: 14px; color: var(--muted); }
.fx-ex > span:first-child { font: 500 10.5px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--faint); }
.fx-ex b { color: var(--accent); font-weight: 600; }
.fx-tool { justify-self: start; font-size: 13.5px; color: var(--text); border-bottom: 1px solid var(--line-3); padding-bottom: 2px; }
.fx-tool:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 900px) {
  .lx-cat summary { grid-template-columns: auto minmax(0, 1fr) auto auto; }
  .lx-cat-peek { display: none; }
  .lx-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .lx-cat summary { padding: 18px; gap: 12px; }
  .lx-cat-name small { display: none; }
  .tools-page .lx-grid .lx-item { padding: 18px; }
  .fx-group > header { flex-direction: column; gap: 4px; }
  .lx-toggle { display: none; }
}

.fx-v { white-space: nowrap; }
.fx-frac { line-height: 1.25; }
.fx-ex-t { font: 400 14.5px/1.5 var(--font); color: var(--muted); letter-spacing: 0; text-transform: none; }

/* ---------- Experiments ---------- */
.ex-list { display: grid; gap: 14px; }
.ex-card { display: grid; gap: 22px; padding: clamp(22px, 3vw, 34px); border: 1px solid var(--line); border-radius: var(--r-lg); background: linear-gradient(180deg, #0d0d10, #070708); box-shadow: inset 0 1px 0 rgba(255,255,255,.04); scroll-margin-top: 100px; }
.ex-head { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 16px; align-items: start; }
.ex-tag { font: 500 11px var(--mono); padding: 4px 8px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); margin-top: 6px; }
.ex-head h3 { font-size: clamp(26px, 2.6vw, 36px); font-weight: 500; letter-spacing: -.04em; line-height: 1.05; }
.ex-head p { margin-top: 8px; max-width: 620px; font-size: 15px; line-height: 1.6; }
.ex-chip { font: 500 10.5px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); padding: 7px 10px; border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); border-radius: 999px; white-space: nowrap; }
.ex-zero { stroke: rgba(255,255,255,.14); stroke-dasharray: 3 5; vector-effect: non-scaling-stroke; }

.ex-curves { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.ex-curve { display: grid; gap: 10px; padding: 16px; border: 1px solid var(--line-strong); border-radius: 14px; background: #09090b; color: var(--text); text-align: left; cursor: pointer; transition: border-color .25s, transform .35s var(--ease-out), background-color .25s, opacity .4s; }
.ex-curve:hover { border-color: color-mix(in srgb, var(--accent) 55%, transparent); transform: translateY(-3px); background: #0e0d14; }
.ex-curve-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; min-height: 22px; }
.ex-curve-top b { font: 600 13px var(--mono); width: 24px; height: 24px; display: grid; place-items: center; border-radius: 7px; background: rgba(255,255,255,.06); }
.ex-verdict { font: 500 10.5px var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.ex-curve svg { width: 100%; height: 110px; display: block; overflow: visible; }
.ex-curve polyline { fill: none; stroke: #e8e6f5; stroke-width: 1.6; vector-effect: non-scaling-stroke; stroke-linejoin: round; stroke-dasharray: 4 4; }
.motion-ok .ex-curve polyline { stroke-dashoffset: 4; animation: ex-draw 1.4s var(--ease-out) forwards; }
@keyframes ex-draw { to { stroke-dashoffset: 0; } }
.ex-curve-stats { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12.5px; color: var(--muted); }
.ex-curve-stats b { color: var(--text); font-weight: 500; font-variant-numeric: tabular-nums; }
.revealed .ex-curve { cursor: default; transform: none; }
.revealed .ex-curve.is-flip { opacity: .55; }
.revealed .ex-curve.is-flip .ex-verdict { color: var(--muted); }
.revealed .ex-curve.is-edge { border-color: var(--up); background: rgba(61,220,151,.05); opacity: 1; }
.revealed .ex-curve.is-edge polyline { stroke: var(--up); }
.revealed .ex-curve.is-edge .ex-verdict { color: var(--up); }
.revealed .ex-curve.picked { opacity: 1; box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 60%, transparent); }
.revealed .ex-curve.picked.is-flip { border-color: var(--down); }
.revealed .ex-curve.picked.is-flip .ex-verdict { color: var(--down); }

.ex-foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px 28px; padding-top: 18px; border-top: 1px solid var(--line); }
.ex-reveal { flex: 1 1 420px; font-size: 15px; line-height: 1.6; color: #c4c4cc; }
.ex-reveal b { font-weight: 600; }
.ex-actions { display: flex; align-items: center; gap: 14px; }
.ex-score { font: 500 11px var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--faint); }
.ex-btn { height: 42px; padding: 0 18px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; color: var(--text); font-size: 14px; cursor: pointer; white-space: nowrap; transition: border-color .2s, background-color .2s, color .2s; }
.ex-btn:hover { border-color: color-mix(in srgb, var(--accent) 55%, transparent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.ex-btn-solid { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 500; height: 48px; padding: 0 24px; font-size: 15px; }
.ex-btn-solid:hover { background: #c9bdff; color: var(--accent-ink); }

.ex-bt { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 14px; }
.ex-bt-empty { grid-column: 1 / -1; display: grid; justify-items: center; gap: 12px; padding: 60px 20px; border: 1px dashed var(--line-strong); border-radius: 14px; text-align: center; }
.ex-bt-empty p { font-size: 13.5px; }
.ex-bt-main { display: flex; flex-direction: column; padding: 16px; border: 1px solid var(--line); border-radius: 14px; background: #09090b; }
.ex-bt-chart { flex: 1; width: 100%; min-height: 240px; height: auto; display: block; overflow: visible; }
.ex-oos-bg { fill: color-mix(in srgb, var(--accent) 5%, transparent); }
.ex-cut { stroke: color-mix(in srgb, var(--accent) 60%, transparent); stroke-dasharray: 4 4; vector-effect: non-scaling-stroke; }
.ex-crowd polyline { fill: none; stroke: rgba(255,255,255,.07); stroke-width: 1; vector-effect: non-scaling-stroke; }
.ex-best-is, .ex-best-oos { fill: none; stroke-width: 2.2; vector-effect: non-scaling-stroke; stroke-linejoin: round; stroke-dasharray: 4 4; stroke-dashoffset: 4; }
.ex-best-is { stroke: var(--accent); }
.ex-best-oos.up { stroke: var(--up); } .ex-best-oos.down { stroke: var(--down); }
.ex-bt.drawn .ex-best-is { stroke-dashoffset: 0; transition: stroke-dashoffset 1.2s var(--ease-out); }
.ex-bt.drawn .ex-best-oos { stroke-dashoffset: 0; transition: stroke-dashoffset 1s var(--ease-out) 1.1s; }
.ex-bt-labels { display: flex; justify-content: space-between; margin-top: 8px; font: 500 10.5px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.ex-bt-labels span:last-child { color: var(--accent); }
.ex-bt-side { display: grid; gap: 12px; align-content: start; }
.ex-bt-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 0; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.ex-bt-stats div { display: grid; gap: 6px; padding: 12px 14px; background: #09090b; align-content: start; }
.ex-bt-stats dt { font: 500 10px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.ex-bt-stats dd { margin: 0; font-size: 22px; font-weight: 500; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.ex-scatter-box { margin: 0; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: #09090b; }
.ex-scatter { width: 100%; height: auto; display: block; }
.ex-dot { fill: rgba(255,255,255,.35); }
.ex-dot-best { fill: var(--accent); stroke: #fff; stroke-width: 1.5; }
.ex-scatter-box figcaption { margin-top: 8px; font-size: 12.5px; line-height: 1.5; color: var(--muted); }
.ex-scatter-box b { color: var(--text); }
.ex-bt-verdict { grid-column: 1 / -1; font-size: 15px; line-height: 1.6; color: var(--text); padding: 14px 16px; border-left: 2px solid var(--accent); background: color-mix(in srgb, var(--accent) 5%, transparent); border-radius: 0 10px 10px 0; }
.lab-more { display: flex; justify-content: center; margin-top: 34px; }
.lx-try { color: var(--accent) !important; }
@media (max-width: 1080px) { .ex-curves { grid-template-columns: repeat(2, minmax(0, 1fr)); } .ex-bt { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .ex-head { grid-template-columns: auto minmax(0, 1fr); } .ex-chip { grid-column: 2; justify-self: start; } .ex-curve { padding: 12px; } .ex-curve svg { height: 80px; } .ex-curve-stats { font-size: 11.5px; gap: 2px 10px; } }

/* ---------- "?" explanations ---------- */
.ex-head h3 { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ex-help { width: 26px; height: 26px; flex-shrink: 0; display: inline-grid; place-items: center; border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent); border-radius: 50%; background: transparent; color: var(--accent); font: 600 13px/1 var(--font); letter-spacing: 0; cursor: pointer; transition: background-color .2s, color .2s, transform .3s var(--ease-out); }
.ex-help:hover { background: color-mix(in srgb, var(--accent) 14%, transparent); transform: scale(1.08); }
.ex-help[aria-expanded="true"] { background: var(--accent); color: var(--accent-ink); }
.ex-help-panel { margin-top: 16px; max-width: 760px; padding: 18px 20px; border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); border-radius: 14px; background: color-mix(in srgb, var(--accent) 6%, #09090b); font-family: 'Heebo', 'Rubik', Arial, sans-serif; text-align: right; }
.ex-help-panel p, .ex-help-panel li { font-size: 15px; line-height: 1.75; color: #d4d4dc; margin: 0; }
.ex-help-panel p + p, .ex-help-panel ol + p, .ex-help-panel p + ol { margin-top: 10px; }
.ex-help-panel b { color: #fff; font-weight: 600; }
.ex-help-panel ol { margin: 6px 0 0; padding: 0 20px 0 0; list-style: decimal; }
.ex-help-panel li + li { margin-top: 4px; }
.motion-ok .ex-help-panel:not([hidden]) { animation: lx-open .35s var(--ease-out); }

/* ---------- One section at a time ---------- */
.tools-page[data-tools] .tools-block { display: none; }
.tools-page[data-active="calculators"] #calculators, .tools-page[data-active="experiments"] #experiments, .tools-page[data-active="formulas"] #formulas, .tools-page[data-active="lexicon"] #lexicon, .tools-page[data-active="analyzer"] #analyzer { display: block; }
.motion-ok .tools-page[data-active] .tools-block { animation: tt-in .5s var(--ease-out); }
@keyframes tt-in { from { opacity: 0; transform: translateY(10px); } }
.tools-page .tools-tabs { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: -10px 0 26px; scroll-margin-top: 100px; }
.tools-page .tools-tabs a { position: relative; display: grid; align-content: start; gap: 12px; padding: 22px; min-height: 190px; border: 1px solid var(--line); border-radius: var(--r-lg); background: linear-gradient(180deg, #0d0d10, #070708); color: var(--text); transition: border-color .3s, background-color .3s, transform .4s var(--ease-out); }
.tools-page .tools-tabs a:hover { border-color: color-mix(in srgb, var(--accent) 50%, transparent); transform: translateY(-3px); }
.tt-n { font: 500 10.5px var(--mono); color: var(--faint); }
.tt-name { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 500; letter-spacing: -.03em; }
.tt-name small { font: 500 10.5px var(--mono); letter-spacing: 0; color: var(--accent); padding: 3px 8px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 12%, transparent); }
.tools-tabs em { font-style: normal; font-size: 14px; line-height: 1.5; color: var(--muted); }
.tools-hint { text-align: center; font: 500 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--faint); margin-bottom: 60px; }
/* Once a section is open the cards fold into a tab bar. */
.tools-page[data-active]:not([data-active=""]) .tools-hint { display: none; }
.tools-page[data-active]:not([data-active=""]) .tools-tabs { position: sticky; top: 92px; z-index: 12; margin-bottom: 70px; padding: 6px; gap: 4px; border: 1px solid var(--line-strong); border-radius: 18px; background: rgba(5,5,6,.88); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.tools-page[data-active]:not([data-active=""]) .tools-tabs a { min-height: 0; padding: 12px 14px; gap: 0; border-color: transparent; background: transparent; transform: none; }
.tools-page[data-active]:not([data-active=""]) .tools-tabs em, .tools-page[data-active]:not([data-active=""]) .tt-n { display: none; }
.tools-page[data-active]:not([data-active=""]) .tt-name { font-size: 15px; justify-content: center; }
.tools-page[data-active]:not([data-active=""]) .tools-tabs a:hover { background: rgba(255,255,255,.04); }
.tools-page .tools-tabs a[aria-current="true"] { background: color-mix(in srgb, var(--accent) 14%, transparent) !important; border-color: color-mix(in srgb, var(--accent) 45%, transparent) !important; }
.tools-page[data-active]:not([data-active=""]) .lx-bar { top: 160px; }
@media (max-width: 1080px) { .tools-page .tools-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); } .tools-page .tools-tabs a:last-child { grid-column: 1 / -1; } .tools-page .tools-tabs a { min-height: 150px; } }
@media (max-width: 900px) {
  .tools-page[data-active]:not([data-active=""]) .tools-tabs { display: flex; overflow-x: auto; scrollbar-width: none; top: 78px; }
  .tools-page[data-active]:not([data-active=""]) .tools-tabs a { flex: 0 0 auto; }
  .tools-page[data-active]:not([data-active=""]) .lx-bar { top: 146px; }
}
@media (max-width: 640px) { .tools-page .tools-tabs { grid-template-columns: 1fr; } .tools-page .tools-tabs a { min-height: 0; } }
.tools-page .tools-tabs a .tt-name { font-family: var(--font); color: var(--text); }
.tools-page .tools-tabs a[aria-current="true"] .tt-name { color: #fff; }
.tools-page[data-active]:not([data-active=""]) .tools-tabs a:not([aria-current="true"]) .tt-name { color: var(--muted); }
@media (max-width: 900px) { .tools-page[data-active]:not([data-active=""]) .tools-tabs { flex-wrap: nowrap; justify-content: flex-start; } }

.tools-tabs.tt-morph { animation: tt-morph .45s var(--ease-out); }
@keyframes tt-morph { from { opacity: .3; transform: scale(.97); } }
.tools-page[data-active]:not([data-active=""]) .tools-tabs a[aria-current="true"]::after { content: "×"; margin-left: 8px; font-size: 14px; color: var(--muted); }
.tools-page[data-active]:not([data-active=""]) .tools-tabs a[aria-current="true"] { display: flex; align-items: center; justify-content: center; }
.tools-page .tools-tabs a .tt-name { font-size: 22px; font-weight: 500; letter-spacing: -.03em; }
.tools-page[data-active]:not([data-active=""]) .tools-tabs a .tt-name { font-size: 15px; letter-spacing: -.01em; }