/* Layout: one calm left-aligned column (max 1120px) on warm off-white. Purple carries every action;
   colour appears only inside the engineering graphics (soil strata, CPT, timelines), the way a borehole log uses it.
   Single light theme by design. */
:root {
  --bg: #f7f4ee;
  --bg-2: #efeae0;
  --surface: #fffdf9;
  --ink: #1d1734;
  --muted: #6a6480;
  --line: #e4ddd0;
  --purple: #6a3fd8;
  --purple-ink: #5531c2;
  --purple-soft: #ece5ff;
  --purple-tint: #f5f1ff;
  /* soil palette for strata */
  --fill: #f2b8cb; --sand: #f1cf86; --silt: #97cbbd; --clay: #bba7f4; --gravel: #f0aa83; --peat: #c9ab8d; --rock: #b3b6cb;
  --hatch: rgba(29, 23, 52, .28);
  --shadow: 0 1px 2px rgba(29, 23, 52, .05), 0 8px 24px rgba(29, 23, 52, .06);
  --shadow-lg: 0 2px 6px rgba(29, 23, 52, .06), 0 20px 48px rgba(29, 23, 52, .12);
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --r: 14px;
  color-scheme: light;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1rem/1.65 var(--font-body); -webkit-font-smoothing: antialiased; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
a { color: var(--purple-ink); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--purple); outline-offset: 2px; border-radius: 6px; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.08; margin: 0; text-wrap: balance; color: var(--ink); }
p { margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding-inline: clamp(16px, 4vw, 40px); }
.eyebrow { font: 500 .72rem/1.3 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }

/* ---------- nav + depth gauge ---------- */
.nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 700 1rem/1 var(--font-display); white-space: nowrap; }
.brand img { width: 32px; height: 32px; }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--muted); text-decoration: none; font: 500 .85rem/1 var(--font-body); padding: 8px 12px; border-radius: 999px; transition: background .15s, color .15s; }
.nav-links a:hover { color: var(--ink); background: var(--bg-2); }
.nav-links a.on, .nav-links a[aria-current="page"] { color: var(--purple-ink); background: var(--purple-soft); }
.depth { font: 500 .72rem/1 var(--font-mono); color: var(--muted); padding: 8px 10px; border-radius: 999px; background: var(--surface); box-shadow: var(--shadow); white-space: nowrap; }
.depth b { color: var(--purple-ink); font-weight: 600; }
.gauge { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--line); }
.gauge i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--fill), var(--sand), var(--silt), var(--clay), var(--purple)); }
@media (max-width: 860px) { .nav-links li.opt { display: none; } }
@media (max-width: 520px) { .brand .bn { display: none; } .depth { display: none; } }

/* ---------- buttons & chips ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: 999px; font: 600 .88rem/1 var(--font-body); text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--surface); cursor: pointer; transition: transform .15s, box-shadow .15s, border-color .15s; }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); border-color: var(--purple); }
.btn.primary { background: var(--purple); border-color: var(--purple); color: var(--on-accent, #fff); }
.btn.primary:hover { background: var(--purple-ink); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--purple-ink); padding-inline: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 8px; font: 500 .82rem/1 var(--font-body); padding: 9px 13px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; transition: background .15s, border-color .15s, color .15s; }
.chip:hover { border-color: var(--purple); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.chip .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.chip .n { font: 500 .72rem var(--font-mono); opacity: .6; }
.seg { display: inline-flex; padding: 4px; border-radius: 999px; background: var(--bg-2); gap: 2px; }
.seg button { border: 0; background: transparent; padding: 8px 14px; border-radius: 999px; font: 500 .82rem/1 var(--font-body); color: var(--muted); cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
.tag { display: inline-flex; align-items: center; gap: 6px; font: 500 .72rem/1 var(--font-mono); padding: 6px 9px; border-radius: 999px; background: var(--bg-2); color: var(--ink); }
.tag .dot { width: 7px; height: 7px; border-radius: 50%; }

/* ---------- hero ---------- */
.hero { padding-block: clamp(40px, 7vw, 88px) clamp(32px, 4vw, 56px); display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: center; }
@media (max-width: 880px) { .hero { grid-template-columns: 1fr; } }
.status { display: inline-flex; align-items: center; gap: 10px; padding: 7px 14px 7px 10px; border-radius: 999px; background: var(--surface); box-shadow: var(--shadow); font: 500 .8rem/1.35 var(--font-body); }
.status i { width: 8px; height: 8px; border-radius: 50%; background: #2bb37f; flex: none; animation: ping 2.4s infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(43, 179, 127, .5); } 70%, 100% { box-shadow: 0 0 0 8px rgba(43, 179, 127, 0); } }
.hero h1 { font-size: clamp(2.9rem, 7.6vw, 5.6rem); font-weight: 800;  letter-spacing: -.02em; margin-top: 22px; line-height: .98; }
.hero h1 span { color: var(--purple); }
.hero .role { margin-top: 16px; font: 500 clamp(1.1rem, 2vw, 1.35rem)/1.4 var(--font-body); }
.hero .summary { margin-top: 14px; color: var(--muted); max-width: 58ch; font-size: 1.04rem; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; align-items: center; }

.cpt { background: var(--surface); border-radius: 22px; padding: 18px 18px 14px; box-shadow: var(--shadow-lg); }
.cpt-head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.cpt-head b { font: 700 1rem var(--font-display); }
.cpt-head span { font: 500 .7rem var(--font-mono); color: var(--muted); }
.cpt svg { width: 100%; height: auto; display: block; margin-top: 10px; touch-action: none; cursor: crosshair; }
.cpt .axis { stroke: var(--line); stroke-width: 1; }
.cpt .tick { fill: var(--muted); font: 10px var(--font-mono); }
.cpt .layer { font: 600 9px var(--font-mono); letter-spacing: .06em; fill: var(--ink); opacity: .7; }
.cpt .trace { fill: none; stroke: var(--purple); stroke-width: 2.2; stroke-linejoin: round; }
.cpt .trace2 { fill: none; stroke: var(--ink); stroke-width: 1; stroke-dasharray: 2 3; opacity: .45; }
.cpt .cursor { stroke: var(--ink); stroke-width: 1; }
.cpt .dot { fill: var(--purple); stroke: var(--surface); stroke-width: 2.5; }
.cpt-read { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.cpt-read div { background: var(--bg); border-radius: 12px; padding: 9px 11px; min-width: 0; }
.cpt-read span { display: block; font: 500 .62rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.cpt-read b { display: flex; align-items: center; gap: 6px; font: 600 .95rem var(--font-body); font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cpt-read b i { width: 9px; height: 9px; border-radius: 3px; flex: none; }
.cpt-note { margin-top: 10px; font: 400 .72rem/1.45 var(--font-mono); color: var(--muted); }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.stat { background: var(--surface); border-radius: var(--r); padding: 18px 20px; box-shadow: var(--shadow); min-width: 0; }
.stat b { display: block; font: 800 clamp(1.7rem, 3.4vw, 2.4rem)/1 var(--font-display);  font-variant-numeric: tabular-nums; color: var(--purple); }
.stat span { display: block; margin-top: 8px; color: var(--muted); font-size: .86rem; line-height: 1.4; }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------- sections ---------- */
section.block { padding-top: clamp(64px, 9vw, 112px); }
.sec-head { display: grid; gap: 10px; margin-bottom: 30px; max-width: 720px; }
.sec-head h2 { font-size: clamp(2rem, 4.4vw, 3rem); font-weight: 800;  letter-spacing: -.015em; }
.sec-head p:not(.eyebrow) { color: var(--muted); max-width: 62ch; }
.row-between { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }

.about { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
@media (max-width: 880px) { .about { grid-template-columns: 1fr; } }
.about .text { display: grid; gap: 14px; font-size: 1.04rem; max-width: 64ch; }
.caps { display: grid; gap: 10px; }
.cap { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 14px; align-items: start; text-align: left; padding: 16px; border-radius: var(--r); background: var(--surface); border: 1px solid transparent; box-shadow: var(--shadow); color: var(--ink); font: inherit; cursor: pointer; transition: transform .15s, border-color .15s; }
.cap:hover { transform: translateY(-2px); border-color: var(--purple-soft); }
.cap .ic { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; }
.cap .ic svg { width: 20px; height: 20px; }
.cap h3 { font: 700 1.02rem/1.25 var(--font-display); display: flex; justify-content: space-between; gap: 10px; }
.cap h3 span { font: 500 .7rem var(--font-mono); color: var(--purple-ink); white-space: nowrap; }
.cap p { color: var(--muted); font-size: .9rem; margin-top: 4px; }

/* ---------- borehole log ---------- */
.bh { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(20px, 4vw, 48px); align-items: start; }
@media (max-width: 880px) { .bh { grid-template-columns: 1fr; } }
.bh-log { background: var(--surface); border-radius: 22px; padding: 18px 18px 18px 14px; box-shadow: var(--shadow); }
.bh-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 0 4px 12px 6px; border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.bh-top b { font: 700 .95rem var(--font-display); }
.bh-top span { font: 500 .68rem var(--font-mono); color: var(--muted); }
.bh-grid { display: grid; grid-template-columns: 58px 64px minmax(0, 1fr); }
.bh-scale { position: relative; }
.bh-scale span { position: absolute; right: 8px; transform: translateY(-50%); font: 500 .68rem var(--font-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.bh-scale span::after { content: ""; position: absolute; right: -8px; top: 50%; width: 5px; border-top: 1px solid var(--muted); }
.bh-col { border-radius: 12px; overflow: hidden; border: 2px solid var(--ink); display: flex; flex-direction: column; }
.bh-layer { border: 0; padding: 0; cursor: pointer; position: relative; transition: filter .15s, transform .15s; border-bottom: 1.5px solid var(--ink); }
.bh-layer:last-child { border-bottom: 0; }
.bh-layer:hover, .bh-layer[aria-selected="true"] { filter: saturate(1.25) brightness(1.03); }
.bh-labels { position: relative; }
.bh-lab { position: absolute; left: 0; right: 0; display: flex; align-items: center; gap: 10px; padding: 0 6px 0 14px; border: 0; background: none; text-align: left; font: inherit; color: var(--ink); cursor: pointer; border-radius: 10px; }
.bh-lab::before { content: ""; position: absolute; left: 0; top: 50%; width: 10px; border-top: 1px dashed var(--muted); }
.bh-lab b { display: block; font-weight: 600; font-size: .9rem; line-height: 1.25; }
.bh-lab small { display: block; color: var(--muted); font: 500 .68rem/1.4 var(--font-mono); }
.bh-lab:hover { background: var(--bg); }
.bh-lab[aria-selected="true"] { background: var(--purple-tint); }
.bh-lab[aria-selected="true"] b { color: var(--purple-ink); }
.bh-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 14px; padding: 12px 6px 0; border-top: 1px solid var(--line); font: 500 .68rem var(--font-mono); color: var(--muted); }
.bh-legend span { display: inline-flex; align-items: center; gap: 6px; }
.bh-legend i { width: 16px; height: 11px; border-radius: 3px; border: 1px solid var(--ink); }
.bh-panel { position: sticky; top: 92px; background: var(--surface); border-radius: 22px; padding: clamp(20px, 3vw, 30px); box-shadow: var(--shadow-lg); min-width: 0; }
.bh-panel .chipline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.bh-panel .soil { display: inline-flex; align-items: center; gap: 8px; font: 600 .7rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; padding: 6px 10px 6px 6px; border-radius: 999px; background: var(--bg); }
.bh-panel .soil i { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid var(--ink); }
.bh-panel .when { font: 500 .78rem var(--font-mono); color: var(--muted); }
.bh-panel h3 { font-size: clamp(1.35rem, 2.6vw, 1.8rem); font-weight: 800; margin-top: 14px; }
.bh-panel .org { margin-top: 6px; font-weight: 600; color: var(--purple-ink); }
.bh-panel .bh-place { color: var(--muted); font-size: .9rem; }
.bh-panel ul { margin: 16px 0 0; padding-left: 20px; display: grid; gap: 8px; }
.bh-panel li::marker { color: var(--purple); }
.bh-nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); }

/* soil fills */
.s-fill { background: repeating-linear-gradient(45deg, var(--hatch) 0 1px, transparent 1px 7px), var(--fill); }
.s-sand { background: radial-gradient(circle, var(--hatch) 0 1.1px, transparent 1.5px) 0 0/7px 7px, var(--sand); }
.s-silt { background: repeating-linear-gradient(90deg, var(--silt) 0 6px, transparent 6px 9px), repeating-linear-gradient(0deg, var(--hatch) 0 1px, var(--silt) 1px 7px); }
.s-clay { background: repeating-linear-gradient(0deg, var(--hatch) 0 1px, var(--clay) 1px 7px); }
.s-gravel { background: radial-gradient(circle, transparent 0 2.4px, var(--hatch) 2.8px 3.5px, transparent 3.9px) 0 0/11px 11px, var(--gravel); }
.s-peat { background: repeating-linear-gradient(-30deg, var(--hatch) 0 1px, transparent 1px 8px), repeating-linear-gradient(30deg, var(--hatch) 0 1px, transparent 1px 8px), var(--peat); }
.s-rock { background: linear-gradient(0deg, var(--hatch) 0 1px, transparent 1px) 0 0/100% 10px, linear-gradient(90deg, var(--hatch) 0 1px, transparent 1px) 0 0/16px 20px, linear-gradient(90deg, var(--hatch) 0 1px, transparent 1px) 8px 10px/16px 20px, var(--rock); }

/* time split */
.split { margin-top: 18px; background: var(--surface); border-radius: var(--r); padding: 16px 18px; box-shadow: var(--shadow); }
.split-bar { display: flex; height: 16px; border-radius: 99px; overflow: hidden; margin-top: 10px; gap: 2px; }
.split-bar button { border: 0; padding: 0; cursor: pointer; transition: filter .15s, flex-grow .3s; }
.split-bar button:hover { filter: brightness(1.08) saturate(1.2); }
.split-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 10px; font-size: .8rem; color: var(--muted); }
.split-legend span { display: inline-flex; gap: 6px; align-items: center; }
.split-legend i { width: 9px; height: 9px; border-radius: 50%; }
.split-legend b { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }

/* ---------- projects ---------- */
.proj-tools { display: grid; gap: 14px; margin-bottom: 22px; }
.proj-count { font: 500 .78rem var(--font-mono); color: var(--muted); }
.proj-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 980px) { .proj-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .proj-grid { grid-template-columns: 1fr; } }
.card { display: flex; flex-direction: column; text-align: left; background: var(--surface); border: 0; border-radius: 18px; overflow: hidden; color: var(--ink); font: inherit; padding: 0; cursor: pointer; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s; min-width: 0; }
.card:hover, .card:focus-visible { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card[hidden] { display: none; }
.media { position: relative; aspect-ratio: 16 / 10; max-width: 100%; background: var(--bg-2); overflow: hidden; }
.media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s; }
.card:hover .media img { transform: scale(1.04); }
.media svg { width: 100%; height: 100%; display: block; }
.media .badge { position: absolute; left: 10px; top: 10px; font: 600 .62rem/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; padding: 6px 8px; border-radius: 999px; background: color-mix(in srgb, var(--surface) 90%, transparent); color: var(--ink); }
.media .count { left: auto; right: 10px; }
.media .stripe { position: absolute; left: 0; right: 0; bottom: 0; height: 5px; display: flex; }
.media .stripe i { flex: 1; }
.card-body { padding: 16px 18px 20px; display: grid; gap: 8px; align-content: start; flex: 1; }
.card-meta { font: 500 .72rem/1.4 var(--font-mono); color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 12px; }
.card h3 { font-size: 1.12rem; font-weight: 700; line-height: 1.25; }
.card p { color: var(--muted); font-size: .9rem; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 2px; }
.card .more { margin-top: auto; padding-top: 8px; font: 600 .82rem var(--font-body); color: var(--purple-ink); }

.timeline { background: var(--surface); border-radius: 22px; padding: 18px; box-shadow: var(--shadow); overflow-x: auto; }
.tl-inner { min-width: 700px; }
.tl-axis { position: relative; height: 22px; margin-left: 220px; border-bottom: 1px solid var(--line); }
.tl-axis span { position: absolute; top: 0; font: 500 .68rem var(--font-mono); color: var(--muted); transform: translateX(-50%); }
.tl-row { display: grid; grid-template-columns: 220px minmax(0, 1fr); align-items: center; min-height: 32px; border-radius: 8px; transition: opacity .2s, background .15s; }
.tl-row:hover { background: var(--bg); }
.tl-row.dim { opacity: .22; }
.tl-name { font-size: .8rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: 0 12px 0 8px; color: var(--ink); }
.tl-track { position: relative; height: 32px; }
.tl-grid { position: absolute; top: 0; bottom: 0; border-left: 1px dashed var(--line); }
.tl-bar { position: absolute; top: 8px; height: 16px; border-radius: 99px; border: 0; padding: 0; cursor: pointer; display: flex; overflow: hidden; min-width: 10px; transition: transform .12s, box-shadow .15s; }
.tl-bar i { flex: 1; }
.tl-bar:hover, .tl-bar:focus-visible { transform: scaleY(1.3); box-shadow: 0 2px 8px rgba(29, 23, 52, .2); }
.tl-tip { position: fixed; z-index: 60; pointer-events: none; background: var(--ink); color: var(--bg); padding: 8px 11px; border-radius: 10px; font: 500 .75rem/1.4 var(--font-body); max-width: 260px; opacity: 0; transition: opacity .12s; }
.tl-tip.on { opacity: 1; }
.tl-tip small { display: block; opacity: .7; font-family: var(--font-mono); }

.places { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.place { background: var(--surface); border-radius: 18px; padding: 16px 18px; box-shadow: var(--shadow); min-width: 0; }
.place h3 { font-size: 1.05rem; font-weight: 700; display: flex; justify-content: space-between; gap: 10px; align-items: baseline; }
.place h3 span { font: 600 .75rem var(--font-mono); color: var(--purple-ink); }
.place ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 4px; }
.place li button { width: 100%; display: grid; grid-template-columns: 10px minmax(0, 1fr); gap: 10px; align-items: baseline; text-align: left; border: 0; background: none; padding: 6px 8px; border-radius: 8px; font: inherit; font-size: .86rem; color: var(--ink); cursor: pointer; }
.place li button:hover { background: var(--purple-tint); }
.place li i { width: 9px; height: 9px; border-radius: 50%; }

/* drawings */
.sk-line { stroke: var(--ink); fill: none; stroke-width: 1.5; }
.sk-thin { stroke: var(--ink); opacity: .35; fill: none; stroke-width: 1; }
.sk-dim { stroke: var(--muted); fill: none; stroke-width: .8; stroke-dasharray: 4 3; }
.sk-mark { stroke: var(--purple); fill: none; stroke-width: 2.6; }
.sk-fill { fill: var(--surface); stroke: var(--ink); stroke-width: 1.5; }
.sk-solid { fill: var(--ink); opacity: .45; }
.sk-water { stroke: #3b82c4; fill: none; stroke-width: 1.8; }
.sk-text { fill: var(--ink); font: 600 9.5px var(--font-mono); letter-spacing: .05em; paint-order: stroke; stroke: var(--bg-2); stroke-width: 3.5px; stroke-linejoin: round; }
.sk-soil-a { fill: var(--sand); opacity: .55; }
.sk-soil-b { fill: var(--clay); opacity: .45; }

/* modal */
dialog.modal { width: min(960px, calc(100vw - 32px)); max-height: calc(100vh - 48px); padding: 0; border: 0; border-radius: 24px; background: var(--surface); color: var(--ink); box-shadow: var(--shadow-lg); }
dialog.modal::backdrop { background: rgba(29, 23, 52, .45); backdrop-filter: blur(4px); }
.modal-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
@media (max-width: 760px) { .modal-grid { grid-template-columns: 1fr; } }
.gallery { background: var(--bg-2); display: grid; align-content: start; min-width: 0; }
.gallery .stage { aspect-ratio: 4 / 3; max-width: 100%; overflow: hidden; position: relative; }
.gallery .stage img, .gallery .stage svg { width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery .mcap { padding: 10px 16px; font: 400 .72rem/1.5 var(--font-mono); color: var(--muted); }
.gallery .mcap a { color: var(--muted); }
.thumbs { display: flex; gap: 6px; padding: 0 16px 16px; overflow-x: auto; }
.thumbs button { flex: 0 0 64px; height: 46px; padding: 0; border-radius: 8px; overflow: hidden; border: 2px solid transparent; background: var(--surface); cursor: pointer; }
.thumbs button[aria-pressed="true"] { border-color: var(--purple); }
.thumbs img { width: 100%; height: 100%; object-fit: cover; }
.modal-body { padding: clamp(20px, 3vw, 30px); display: grid; gap: 12px; align-content: start; min-width: 0; overflow-y: auto; max-height: calc(100vh - 50px); }
.modal-body h3 { font-size: clamp(1.4rem, 2.6vw, 1.85rem); font-weight: 800; padding-right: 40px; }
.modal-body h4 { font: 600 .7rem var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-top: 8px; }
.modal-body ul { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.modal-body li::marker { color: var(--purple); }
.modal-body .result { padding: 12px 14px; border-radius: 12px; background: var(--purple-tint); }
.kv { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 6px 16px; font-size: .9rem; padding: 12px 14px; border-radius: 12px; background: var(--bg); }
.kv dt { color: var(--muted); font: 500 .7rem/1.9 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; }
.kv dd { margin: 0; }
.close { position: absolute; top: 14px; right: 14px; z-index: 2; width: 38px; height: 38px; border-radius: 50%; border: 0; background: var(--surface); box-shadow: var(--shadow); color: var(--ink); cursor: pointer; font-size: 20px; line-height: 1; }
.modal-nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 8px; }

/* ---------- field notes ---------- */
.notes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 980px) { .notes { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .notes { grid-template-columns: 1fr; } }
.note { display: grid; grid-template-rows: auto 1fr; border-radius: 18px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow); color: var(--ink); text-decoration: none; transition: transform .2s, box-shadow .2s; min-width: 0; }
.note:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.note .media { aspect-ratio: 16 / 9; }
.note .b { padding: 14px 16px 18px; display: grid; gap: 6px; align-content: start; }
.note b { font-weight: 600; line-height: 1.35; }
.note small { color: var(--muted); font: 500 .7rem var(--font-mono); }
.note .go { color: var(--purple-ink); font-weight: 600; font-size: .82rem; }

/* ---------- skills explorer ---------- */
.skillx { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 18px; align-items: start; }
@media (max-width: 880px) { .skillx { grid-template-columns: 1fr; } }
.sk-groups { display: grid; gap: 14px; }
.sk-group { background: var(--surface); border-radius: 18px; padding: 16px 18px; box-shadow: var(--shadow); }
.sk-group h3 { font: 700 .95rem var(--font-display); margin-bottom: 10px; }
.sk-group .chips { gap: 6px; }
.sk-group .chip { font-size: .8rem; padding: 7px 11px; }
.sk-group .chip.static { cursor: default; background: var(--bg); border-color: transparent; }
.sk-group .chip.static:hover { border-color: transparent; }
.sk-out { position: sticky; top: 92px; background: var(--surface); border-radius: 22px; padding: 22px; box-shadow: var(--shadow-lg); min-width: 0; }
.sk-out h3 { font-size: 1.3rem; font-weight: 800; margin-top: 6px; }
.sk-out p { color: var(--muted); margin-top: 6px; font-size: .92rem; }
.sk-out ul { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 6px; }
.sk-out li button { width: 100%; display: grid; grid-template-columns: 4px minmax(0, 1fr) auto; gap: 12px; align-items: center; text-align: left; border: 0; background: var(--bg); padding: 10px 12px; border-radius: 12px; font: inherit; color: var(--ink); cursor: pointer; }
.sk-out li button:hover { background: var(--purple-tint); }
.sk-out li i { align-self: stretch; border-radius: 4px; }
.sk-out li b { font-weight: 600; font-size: .9rem; line-height: 1.3; }
.sk-out li small { font: 500 .7rem var(--font-mono); color: var(--muted); white-space: nowrap; }

/* ---------- teaching ---------- */
.teach-top { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 16px; margin-bottom: 18px; }
@media (max-width: 860px) { .teach-top { grid-template-columns: 1fr; } }
.panel { background: var(--surface); border-radius: 18px; padding: 20px 22px; box-shadow: var(--shadow); min-width: 0; }
.panel h3 { font-size: 1.15rem; font-weight: 700; }
.panel p { color: var(--muted); margin-top: 6px; font-size: .92rem; }
.stack { display: flex; height: 22px; border-radius: 99px; overflow: hidden; gap: 2px; margin-top: 16px; }
.stack button { border: 0; padding: 0; cursor: pointer; transition: filter .15s; }
.stack button:hover, .stack button[aria-pressed="true"] { filter: brightness(1.1) saturate(1.2); }
.stack-legend { display: grid; gap: 6px; margin-top: 14px; }
.stack-legend button { display: grid; grid-template-columns: 10px minmax(0, 1fr) auto auto; gap: 10px; align-items: center; border: 0; background: none; padding: 6px 8px; border-radius: 8px; font: inherit; font-size: .86rem; color: var(--ink); text-align: left; cursor: pointer; }
.stack-legend button:hover, .stack-legend button[aria-pressed="true"] { background: var(--bg); }
.stack-legend i { width: 10px; height: 10px; border-radius: 50%; }
.stack-legend span.v { font: 600 .78rem var(--font-mono); font-variant-numeric: tabular-nums; }
.stack-legend span.c { font: 500 .72rem var(--font-mono); color: var(--muted); }
.panel .big-num { font: 800 clamp(2.4rem, 5vw, 3.4rem)/1 var(--font-display);  color: var(--purple); margin-top: 6px; }
.slides-tools { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.search { width: min(100%, 340px); padding: 11px 14px 11px 38px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236a6480' stroke-width='2'%3E%3Ccircle cx='7' cy='7' r='5'/%3E%3Cpath d='m11 11 4 4'/%3E%3C/svg%3E") 14px 50% no-repeat; color: var(--ink); font: 400 .92rem var(--font-body); }
.search:focus { border-color: var(--purple); outline: none; box-shadow: 0 0 0 3px var(--purple-soft); }
.slides { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
@media (max-width: 900px) { .slides { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .slides { grid-template-columns: 1fr; } }
.slide { display: grid; grid-template-columns: 4px minmax(0, 1fr); gap: 14px; padding: 14px 16px 14px 12px; border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); color: var(--ink); text-decoration: none; transition: transform .15s, box-shadow .15s; min-width: 0; }
.slide:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.slide > i { border-radius: 4px; }
.slide b { display: block; font-weight: 600; font-size: .92rem; line-height: 1.3; }
.slide small { display: block; color: var(--muted); font: 500 .7rem/1.5 var(--font-mono); margin-top: 4px; }
.slide .meter { display: block; height: 4px; border-radius: 99px; background: var(--bg-2); margin-top: 8px; overflow: hidden; }
.slide .meter i { display: block; height: 100%; border-radius: 99px; }
.docs { display: grid; gap: 10px; margin-top: 10px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 700px) { .docs { grid-template-columns: 1fr; } }
.empty-note { color: var(--muted); padding: 20px 0; }

.teaser { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 28px; align-items: center; padding: clamp(22px, 4vw, 38px); border-radius: 24px; background: var(--purple-tint); margin-top: 22px; }
@media (max-width: 760px) { .teaser { grid-template-columns: 1fr; } }
.teaser h3 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; }
.teaser p { color: var(--muted); margin-top: 8px; max-width: 58ch; }
.shelf { display: grid; gap: 8px; }
.shelf div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; font-size: .86rem; }
.shelf div i { grid-column: 1 / -1; height: 6px; border-radius: 99px; background: var(--purple); opacity: .85; }

/* ---------- education ---------- */
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 760px) { .two { grid-template-columns: 1fr; } }
.entries { list-style: none; margin: 10px 0 0; padding: 0; }
.entries li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.entries li:last-child { border-bottom: 0; }
.entries b { font-weight: 600; }
.entries .org { grid-column: 1; color: var(--muted); font-size: .9rem; }
.entries .when { grid-row: 1; grid-column: 2; font: 500 .75rem var(--font-mono); color: var(--purple-ink); white-space: nowrap; }
.extras { margin-top: 14px; color: var(--muted); display: grid; gap: 4px; font-size: .92rem; }
.extras b { color: var(--ink); font-weight: 600; }

/* ---------- contact ---------- */
.contact { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 16px; }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }
.contact .lead { background: var(--purple); color: #fff; border-radius: 24px; padding: clamp(24px, 4vw, 40px); display: grid; gap: 14px; align-content: space-between; position: relative; overflow: hidden; }
.contact .lead::after { content: ""; position: absolute; right: -40px; bottom: -40px; width: 220px; height: 220px; border-radius: 50%; background: repeating-linear-gradient(0deg, rgba(255, 255, 255, .14) 0 1px, transparent 1px 9px); }
.contact .lead h2 { color: #fff; font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800;  }
.contact .lead p { opacity: .9; max-width: 48ch; }
.contact .lead .eyebrow { color: rgba(255, 255, 255, .75); }
.contact .lead .btn { background: #fff; color: var(--purple-ink); border-color: #fff; position: relative; z-index: 1; }
.cards { display: grid; gap: 10px; }
.cline { display: grid; grid-template-columns: 42px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 14px 16px; border-radius: 16px; background: var(--surface); box-shadow: var(--shadow); }
.cline .ic { width: 42px; height: 42px; border-radius: 12px; background: var(--purple-soft); color: var(--purple-ink); display: grid; place-items: center; }
.cline .ic svg { width: 18px; height: 18px; }
.cline small { display: block; color: var(--muted); font: 500 .66rem var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.cline b, .cline a.v { display: block; font-weight: 600; color: var(--ink); text-decoration: none; overflow-wrap: anywhere; }
.copy { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 7px 12px; font: 600 .74rem var(--font-body); cursor: pointer; }
.copy:hover { border-color: var(--purple); color: var(--purple-ink); }
.toast { position: fixed; left: 50%; bottom: calc(22px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%) translateY(30px); opacity: 0; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 999px; font: 600 .82rem var(--font-body); transition: .25s; pointer-events: none; z-index: 70; }
.toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

footer.foot { margin-top: 88px; padding-block: 24px 36px; color: var(--muted); font-size: .82rem; border-top: 1px solid var(--line); }
footer.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; align-items: center; }
footer.foot .brand { font-size: .92rem; }
footer.foot .brand img { width: 26px; height: 26px; }

/* ---------- library page ---------- */
.lib-hero { padding-block: clamp(40px, 6vw, 76px) 22px; display: grid; gap: 14px; }
.lib-hero h1 { font-size: clamp(2.4rem, 7vw, 4.4rem); font-weight: 800;  letter-spacing: -.02em; }
.lib-hero p { color: var(--muted); max-width: 70ch; }
.notice { padding: 12px 16px; border-radius: 14px; background: var(--purple-tint); max-width: 78ch; font-size: .92rem; color: var(--ink) !important; }
.lib-tools { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 58px); z-index: 5; background: var(--bg); padding-block: 12px; display: grid; gap: 10px; border-bottom: 1px solid var(--line); }
.lib-tools .search { width: 100%; }
.lib-count { font: 500 .75rem var(--font-mono); color: var(--muted); }
.lib-cat { margin-top: 36px; }
.lib-cat > h2 { font-size: clamp(1.6rem, 3.6vw, 2.2rem); font-weight: 800; display: flex; align-items: center; gap: 12px; }
.lib-cat > h2 i { width: 14px; height: 14px; border-radius: 4px; }
.lib-sec { margin-top: 18px; background: var(--surface); border-radius: 18px; padding: 14px 18px; box-shadow: var(--shadow); }
.lib-sec h3 { font-size: 1rem; font-weight: 700; display: flex; justify-content: space-between; gap: 12px; }
.lib-sec h3 span { font: 500 .75rem var(--font-mono); color: var(--muted); }
.lib-list { list-style: none; margin: 8px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
@media (max-width: 720px) { .lib-list { grid-template-columns: 1fr; } }
.lib-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 10px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .92rem; }
.lib-list a.t { color: var(--ink); text-decoration: none; overflow-wrap: anywhere; }
.lib-list a.t:hover { color: var(--purple-ink); text-decoration: underline; }
.lib-list .sz { font: 400 .7rem var(--font-mono); color: var(--muted); white-space: nowrap; }
@media (max-width: 600px) { .bh-grid { grid-template-columns: 50px 46px minmax(0, 1fr); } .bh-lab b { font-size: .84rem; } .bh-lab { padding-left: 12px; } }

/* ---------- analysis page ---------- */
.tabs { margin-bottom: 22px; flex-wrap: wrap; }
.tool { padding-top: 6px; }
.tool-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 24px; align-items: end; margin-bottom: 16px; }
.tool-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; }
.tool-head p { color: var(--muted); margin-top: 6px; max-width: 64ch; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .tool-grid { grid-template-columns: 1fr; } }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; margin-bottom: 14px; }
.fields label, .paste { display: grid; gap: 4px; font: 500 .72rem var(--font-mono); color: var(--muted); }
.fields input, .fields select, .itable input, .itable select, .paste textarea { font: 500 .9rem var(--font-body); color: var(--input-ink, #0000ff); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; width: 100%; min-width: 0; }
.fields input:focus, .fields select:focus, .itable input:focus, .itable select:focus, .paste textarea:focus { outline: none; border-color: var(--purple); box-shadow: 0 0 0 3px var(--purple-soft); }
.paste { margin-top: 12px; }
.paste textarea { font: 400 .8rem var(--font-mono); color: var(--ink); resize: vertical; }
.table-scroll { overflow-x: auto; }
.itable { width: 100%; border-collapse: collapse; }
#p-layers { min-width: 640px; }
#sb-t { min-width: 600px; }
#c-t { min-width: 620px; }
.itable select { min-width: 72px; }
#p-layers input { min-width: 54px; }
#l-data { min-width: 300px; }
.itable th { font: 500 .66rem var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); text-align: left; padding: 6px 4px; }
.itable td { padding: 3px; }
.itable input, .itable select { padding: 6px 7px; font-size: .84rem; border-radius: 8px; }
.itable td.out { font: 600 .84rem var(--font-body); font-variant-numeric: tabular-nums; padding-inline: 8px; white-space: nowrap; }
.itable .x { border: 0; background: none; color: var(--muted); font-size: 18px; cursor: pointer; border-radius: 6px; width: 28px; height: 28px; }
.itable .x:hover { background: var(--bg-2); color: var(--ink); }
.res-big { display: grid; gap: 2px; padding: 14px 16px; border-radius: 14px; background: var(--purple-tint); }
.res-big span { font: 500 .7rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.res-big b { font: 800 clamp(1.8rem, 4vw, 2.4rem)/1.1 var(--font-display); color: var(--purple); font-variant-numeric: tabular-nums; }
.res-big small { color: var(--muted); font-size: .84rem; }
.res-list { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 14px; margin: 14px 0 6px; font-size: .9rem; }
.res-list dt { color: var(--muted); }
.res-list dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; text-align: right; }
.chart { width: 100%; height: auto; display: block; margin-top: 10px; }
.chart.tall { max-height: 520px; }
.chart .lbl { font: 600 9px var(--font-mono); fill: var(--ink); letter-spacing: .05em; }
.chart .val { font: 600 10px var(--font-mono); fill: var(--ink); }
.chart .tk { font: 500 10px var(--font-mono); fill: var(--muted); }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .mline { fill: none; stroke: var(--purple); stroke-width: 2.2; stroke-linejoin: round; }
.chart .mdot { fill: var(--purple); stroke: var(--surface); stroke-width: 1.5; }
.chart .dline { fill: none; stroke: #e0703f; stroke-width: 2; stroke-dasharray: 6 4; }
.chart .hit { fill: none; stroke: var(--ink); stroke-width: 2; }
.chart .iline { fill: none; stroke: var(--ink); stroke-width: 1.4; }
.chart .cur { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 3 3; }
.readout { margin-top: 10px; padding: 10px 12px; border-radius: 12px; background: var(--bg); font-size: .86rem; font-variant-numeric: tabular-nums; }
.readout i, .zbars i { display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 6px; vertical-align: middle; }
.zbars { display: grid; gap: 8px; margin-top: 12px; }
.zbars div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 10px; font-size: .86rem; }
.zbars em { grid-column: 1 / -1; height: 6px; border-radius: 99px; display: block; min-width: 2px; }
.muted { color: var(--muted); }
.method { margin-top: 28px; }
.method ul { margin: 10px 0 0; padding-left: 20px; display: grid; gap: 8px; color: var(--muted); font-size: .9rem; }
.method b { color: var(--ink); }

/* ---------- blog ---------- */
.posts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 760px) { .posts { grid-template-columns: 1fr; } }
.pcard { position: relative; display: grid; gap: 8px; align-content: start; padding: 26px 24px 22px; border-radius: 20px; background: var(--surface); box-shadow: var(--shadow); color: var(--ink); text-decoration: none; overflow: hidden; transition: transform .2s, box-shadow .2s; min-width: 0; }
.pcard:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.pcard.lead { grid-column: 1 / -1; padding: 34px 30px 28px; }
.pcard.lead h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
.pband { position: absolute; left: 0; top: 0; right: 0; height: 6px; }
.pmeta { font: 500 .72rem var(--font-mono); color: var(--muted); }
.pcard h2 { font-size: 1.3rem; font-weight: 800; line-height: 1.2; }
.pcard p { color: var(--muted); max-width: 70ch; }
.ptags { display: flex; flex-wrap: wrap; gap: 6px; }
.pcard .more { color: var(--purple-ink); font-weight: 600; font-size: .86rem; margin-top: 4px; }
.pcard.mini { padding: 18px; gap: 4px; }
.pcard.mini b { font-weight: 600; }
.post { max-width: 760px; padding-top: 32px; }
.post header { position: relative; margin-top: 18px; padding-top: 20px; display: grid; gap: 10px; }
.post header .pband { right: auto; width: 64px; border-radius: 99px; }
.post h1 { font-size: clamp(2rem, 5vw, 3.1rem); font-weight: 800; letter-spacing: -.015em; }
.post .lede { font-size: 1.15rem; color: var(--muted); }
.pbody { margin-top: 26px; display: grid; gap: 16px; font-size: 1.06rem; line-height: 1.75; }
.pbody h3 { font-size: 1.35rem; font-weight: 800; margin-top: 12px; }
.pbody ul { margin: 0; padding-left: 22px; display: grid; gap: 8px; }
.pbody li::marker { color: var(--purple); }
.pbody blockquote { margin: 8px 0; padding: 16px 20px; border-radius: 16px; background: var(--purple-tint); font: 600 1.1rem/1.5 var(--font-body); color: var(--purple-ink); }
.pnav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 40px; }
@media (max-width: 560px) { .pnav { grid-template-columns: 1fr; } }
.tools-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 760px) { .tools-row { grid-template-columns: 1fr; } }
.toolcard { position: relative; display: grid; gap: 4px; padding: 22px 20px 18px 26px; border-radius: 18px; background: var(--surface); box-shadow: var(--shadow); color: var(--ink); text-decoration: none; overflow: hidden; transition: transform .2s, box-shadow .2s; }
.toolcard:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.toolcard .tband { position: absolute; left: 0; top: 0; bottom: 0; width: 8px; }
.toolcard b { font: 700 1.1rem var(--font-display); }
.toolcard small { color: var(--muted); font: 500 .74rem var(--font-mono); }

/* ---------- estimating ---------- */
@media (max-width: 640px) { .nav-links a { padding: 7px 8px; font-size: .8rem; } }
.fgroup { border: 0; padding: 0; margin: 0 0 16px; }
.fgroup legend { font: 700 .95rem var(--font-display); margin-bottom: 10px; padding: 0; }
details.rates { border-top: 1px solid var(--line); padding-top: 12px; }
details.rates summary { cursor: pointer; font-weight: 600; color: var(--purple-ink); margin-bottom: 12px; }
.est-side { display: grid; gap: 16px; align-content: start; }
.est-side h3 { font-size: 1.05rem; font-weight: 700; }
.elegend { display: grid; gap: 4px; margin-top: 12px; }
.elegend div { display: grid; grid-template-columns: 10px minmax(0, 1fr) auto auto; gap: 10px; align-items: center; font-size: .86rem; padding: 4px 0; }
.elegend i { width: 10px; height: 10px; border-radius: 3px; }
.elegend .c { font: 500 .72rem var(--font-mono); color: var(--muted); }
.elegend b { font-variant-numeric: tabular-nums; }
#e-stack span { display: block; }
.qgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 10px; }
.qgrid div { background: var(--bg); border-radius: 10px; padding: 8px 10px; min-width: 0; }
.qgrid span { display: block; font: 500 .66rem var(--font-mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.qgrid b { font-weight: 600; font-variant-numeric: tabular-nums; font-size: .9rem; }
.etable { width: 100%; border-collapse: collapse; min-width: 560px; font-size: .9rem; margin-top: 10px; }
.etable th { text-align: left; font: 500 .68rem var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 8px 10px 8px 0; border-bottom: 1px solid var(--line); }
.etable td { padding: 8px 10px 8px 0; border-bottom: 1px solid var(--line); }
.etable .n { text-align: right; font-variant-numeric: tabular-nums; }
.gdot { display: inline-block; width: 8px; height: 8px; border-radius: 2px; margin-right: 8px; vertical-align: middle; }

/* workbook library */
.wbgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 14px; }
@media (max-width: 900px) { .wbgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .wbgrid { grid-template-columns: 1fr; } }
.wb { position: relative; display: grid; gap: 6px; align-content: start; padding: 16px 16px 14px 20px; border-radius: 16px; background: var(--surface); box-shadow: var(--shadow); color: var(--ink); text-decoration: none; overflow: hidden; transition: transform .2s, box-shadow .2s; min-width: 0; }
.wb:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.wb::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background: var(--c, var(--purple)); }
.wb b { font-weight: 700; line-height: 1.3; }
.wb small { font: 500 .7rem var(--font-mono); color: var(--muted); }
.wb p { font-size: .86rem; color: var(--muted); }
.wb .dl { font-weight: 600; font-size: .82rem; color: var(--purple-ink); margin-top: 2px; }
.chart .tk { paint-order: stroke; stroke: var(--surface); stroke-width: 3px; stroke-linejoin: round; }

/* ---------- calculator picker ---------- */
.picker { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px 18px; padding: 18px; border-radius: 20px; background: var(--surface); box-shadow: var(--shadow); margin-bottom: 26px; }
.pgroup { display: grid; gap: 4px; align-content: start; }
.plabel { display: flex; align-items: center; gap: 8px; font: 600 .68rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-bottom: 2px; }
.plabel i { width: 10px; height: 10px; border-radius: 3px; }
.pgroup button, .plink { text-align: left; border: 0; background: none; padding: 7px 10px; border-radius: 10px; font: 500 .88rem var(--font-body); color: var(--ink); cursor: pointer; text-decoration: none; }
.pgroup button:hover, .plink:hover { background: var(--bg); }
.pgroup button[aria-pressed="true"] { background: var(--purple); color: #fff; }
.plink { color: var(--purple-ink); font-weight: 600; }
.pill { display: inline-block; font: 600 .72rem/1 var(--font-body); padding: 5px 9px; border-radius: 999px; margin-left: 4px; vertical-align: middle; }
.pill.good { background: #dff5ea; color: #157a52; }
.pill.bad { background: #fde3e3; color: #b42323; }
.pill.warn { background: #fdf0d5; color: #8a6200; }
.res-big small .pill { margin-left: 0; }
h4.sub { font: 700 .9rem var(--font-display); margin: 14px 0 6px; }
.actions.small { margin-top: 8px; }
.fields.wide { grid-template-columns: 1fr; }
.small-note { font-size: .82rem; margin: 6px 0 10px; }
.tool .seg { margin-bottom: 14px; }
.hbars { display: grid; gap: 10px; margin-top: 16px; }
.hbar { display: grid; grid-template-columns: 140px minmax(0, 1fr) auto; gap: 10px; align-items: center; font-size: .86rem; }
.hbar i { display: block; height: 14px; border-radius: 99px; }
.hbar b { font-variant-numeric: tabular-nums; }
.kscale { position: relative; height: 14px; border-radius: 99px; margin-top: 18px; background: linear-gradient(90deg, var(--clay), var(--silt), var(--sand), var(--gravel)); }
.kscale span { position: absolute; top: -5px; width: 4px; height: 24px; border-radius: 2px; background: var(--ink); transform: translateX(-50%); }
.kticks { display: flex; justify-content: space-between; font: 500 .68rem var(--font-mono); color: var(--muted); margin-top: 6px; }
.kticks.lbl { font-family: var(--font-body); font-size: .72rem; }