/* Planted North · learning paths. Shared by every path hub and lesson under /learn/. */
:root{--ground:#F6F9F7;--raised:#FFF;--glacier:#E3EEEA;--line:#CFDDD6;--line-2:#B9CCC3;--ink:#13211B;--muted:#526159;--fir:#1B3A2E;--night:#0B1812;--sprout:#86B85A;--sprout-ink:#3F6E23;--sprout-lt:#B7D98F;--sap:#E0A43A;--sap-ink:#8A5A0B;--sap-wash:#FBF3E0;--bad:#9A3B2E;--bad-wash:#FBEDEA;
--display:"Bricolage Grotesque","Bricolage Grotesque Fallback","Arial Black",system-ui,sans-serif;--sans:"Instrument Sans","Instrument Sans Fallback",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"IBM Plex Mono",ui-monospace,Menlo,monospace}
@media (prefers-color-scheme:dark){:root{color-scheme:dark;--ground:#0E1C16;--raised:#132620;--glacier:#172E26;--line:#24413A;--line-2:#2F5347;--ink:#E8F0EB;--muted:#9DB3A8;--sprout-ink:#A6D27B;--sap-ink:#F0BD5E;--sap-wash:#2A2413;--bad:#F0A193;--bad-wash:#2E1A16}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--ground);color:var(--ink);font:400 17.5px/1.7 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--sprout-ink);text-underline-offset:3px}
.wrap{max-width:1180px;margin:0 auto;padding-inline:20px}
.col{max-width:760px;margin:0 auto;padding-inline:20px}
h1,h2,h3{font-family:var(--display);font-weight:800;letter-spacing:-.03em;text-wrap:balance;margin:0}
.eyebrow{font:600 12px/1.2 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--sprout-ink)}
:focus-visible{outline:3px solid var(--sap);outline-offset:3px}
.sr{position:absolute;left:-9999px}

/* top bar */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--ground) 90%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;justify-content:space-between;align-items:center;height:62px;gap:12px}
.brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--ink)}
.brand svg{width:32px;height:32px}.brand b{font:800 19px/1 var(--display);letter-spacing:-.035em;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:0;background:var(--sap);color:#13211B;text-decoration:none;font:700 15px/1 var(--sans);padding:13px 18px;border-radius:12px;white-space:nowrap;border:0;cursor:pointer}
.btn:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2)}
.btn.big{font-size:16.5px;padding:16px 22px}
@media (max-width:480px){.top .long{display:none}.top .btn{padding:10px 12px;font-size:14px}}

/* hero */
.hero{background:var(--night);color:#EEF5F1;padding-block:52px 44px;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(50% 80% at 90% 0%,rgba(134,184,90,.22),transparent 60%),linear-gradient(rgba(134,184,90,.06) 1px,transparent 1px) 0 0/100% 56px,linear-gradient(90deg,rgba(134,184,90,.06) 1px,transparent 1px) 0 0/56px 100%}
.hero .wrap,.hero .col{position:relative}
.hero .eyebrow{color:var(--sprout-lt)}
.hero .eyebrow a{color:inherit;text-decoration:none}.hero .eyebrow a:hover{text-decoration:underline}
.hero h1{font-size:clamp(36px,6vw,68px);line-height:1;margin:16px 0 18px;max-width:17ch}
.hero.lesson h1{font-size:clamp(32px,5vw,52px);max-width:20ch}
.hero h1 em{font-style:normal;color:var(--sap)}
.hero p{color:#A9C1B5;font-size:clamp(17px,1.8vw,20px);max-width:58ch;margin:0}
.meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:22px;font:500 13px/1.3 var(--mono);color:#8FA99C}

/* stepper (lesson pages) */
.steps{display:flex;gap:8px;list-style:none;margin:0 0 22px;padding:0}
.steps li{flex:1}
.steps a{display:block;height:8px;border-radius:99px;background:rgba(238,245,241,.16);text-decoration:none}
.steps a.done{background:var(--sprout)}
.steps a.here{background:var(--sap)}
.steps a:hover{filter:brightness(1.2)}

/* hub: progress card */
.hubgrid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:36px;align-items:end}
@media (max-width:860px){.hubgrid{grid-template-columns:minmax(0,1fr);gap:28px}}
.prog{background:rgba(238,245,241,.06);border:1px solid rgba(238,245,241,.14);border-radius:20px;padding:22px}
.prog .lab{font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#8FA99C}
.prog .num{font:800 44px/1 var(--display);letter-spacing:-.03em;margin:10px 0 12px;color:#EEF5F1}
.prog .num small{font:500 15px/1 var(--mono);color:#8FA99C;letter-spacing:0;margin-left:6px}
.bar{height:10px;border-radius:99px;background:rgba(238,245,241,.14);overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--sprout);border-radius:99px;transition:width .4s ease}
.prog .btn{margin-top:18px;width:100%}
.prog .fine{font-size:13px;color:#8FA99C;margin:12px 0 0;line-height:1.5}
.prog .fine button{background:none;border:0;padding:0;color:#B7D98F;font:inherit;text-decoration:underline;cursor:pointer}

/* hub: lesson list */
.sec{padding-block:48px 8px}
.sec h2{font-size:clamp(28px,3.4vw,40px);line-height:1.05;margin:10px 0 8px}
.sec>.wrap>p.lead,.sec>.col>p.lead{color:var(--muted);max-width:62ch;margin:0 0 24px}
.lessons{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.lessons a{display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:16px;align-items:center;background:var(--raised);border:1px solid var(--line);border-radius:18px;padding:18px 20px;text-decoration:none;color:var(--ink)}
.lessons a:hover{border-color:var(--sprout)}
.lessons .dot{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;font:600 16px/1 var(--mono);background:var(--glacier);color:var(--muted);border:2px solid var(--line)}
.lessons .done .dot{background:var(--sprout);border-color:var(--sprout);color:#13211B}
.lessons .next .dot{border-color:var(--sap);color:var(--sap-ink);background:var(--sap-wash)}
.lessons h3{font-size:20px;line-height:1.2;letter-spacing:-.015em}
.lessons p{margin:4px 0 0;font-size:15px;line-height:1.5;color:var(--muted)}
.lessons .state{font:600 12px/1.2 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.lessons .done .state{color:var(--sprout-ink)}.lessons .next .state{color:var(--sap-ink)}
@media (max-width:560px){.lessons a{grid-template-columns:44px minmax(0,1fr);padding:16px}.lessons .dot{width:44px;height:44px}.lessons .state{grid-column:2;margin-top:-6px}}

.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media (max-width:860px){.grid3{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--raised);border:1px solid var(--line);border-radius:18px;padding:20px 22px}
.card .n{font:600 12px/1 var(--mono);color:var(--sap-ink);letter-spacing:.08em;text-transform:uppercase}
.card h3{font-size:20px;line-height:1.2;margin:10px 0 6px;letter-spacing:-.015em}
.card p{margin:0;font-size:15px;line-height:1.55;color:var(--muted)}
a.card{text-decoration:none;color:var(--ink);display:block}a.card:hover{border-color:var(--sprout)}
.card.soon{background:transparent;border-style:dashed}

/* lesson article */
article{padding-block:36px 8px}
article h2{font-size:clamp(25px,3vw,32px);line-height:1.1;margin:34px 0 12px;scroll-margin-top:84px}
article h3{font-size:20px;line-height:1.25;margin:24px 0 6px;letter-spacing:-.015em}
article p{margin:0 0 14px}
article ul,article ol{padding-left:22px;margin:0 0 14px}
article li{margin-bottom:6px}
.answer{background:var(--glacier);border-left:4px solid var(--sprout);border-radius:0 12px 12px 0;padding:14px 18px;margin:0 0 22px;font-size:18.5px;line-height:1.55}
.answer b:first-child{display:block;font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--sprout-ink);margin-bottom:6px}
.tbl{overflow-x:auto;margin:6px 0 18px;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.5;background:var(--raised)}
@media (max-width:560px){table{font-size:14px;line-height:1.45}th,td{padding:9px 9px!important}th{font-size:11px!important;letter-spacing:.03em!important}td.num,th.num{white-space:normal}.illus,.move,.check{padding:18px 16px}}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font:600 12px/1.2 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--glacier)}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.illus{background:var(--raised);border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin:8px 0 20px}
.illus .tag{font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--sap-ink)}
.illus p{margin:10px 0 0}
.illus .tbl{margin:12px 0 0}
.note{font-size:14.5px;color:var(--muted);line-height:1.6}

.move{background:var(--sap-wash);border:1px solid var(--sap);border-radius:18px;padding:22px;margin:34px 0 0}
.move .tag{font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--sap-ink)}
.move h2{margin:8px 0 10px;font-size:24px}
.move ol{margin-bottom:0}
.move li:last-child{margin-bottom:0}

.check{background:var(--raised);border:1px solid var(--line);border-radius:18px;padding:22px;margin:22px 0 0}
.check .tag{font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--sprout-ink)}
.check h2{margin:8px 0 14px;font-size:21px;line-height:1.3;letter-spacing:-.015em}
.opts{display:grid;gap:10px}
.opts button{all:unset;box-sizing:border-box;display:block;width:100%;cursor:pointer;border:1.5px solid var(--line-2);border-radius:12px;padding:13px 16px;font:500 16.5px/1.45 var(--sans);color:var(--ink);background:var(--ground)}
.opts button:focus-visible{outline:3px solid var(--sap);outline-offset:3px}
@media (hover:hover){.opts button:not([disabled]):hover{border-color:var(--sprout)}}
.opts button.right{border-color:var(--sprout);background:var(--glacier)}
.opts button.wrong{border-color:var(--bad);background:var(--bad-wash)}
.opts button[disabled]{cursor:default}
.fb{margin:14px 0 0;padding:12px 16px;border-radius:12px;background:var(--glacier);font-size:16px;line-height:1.55}
.fb b{font-family:var(--display)}
.fb[hidden]{display:none}

.finish{margin:22px 0 0;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.finish .btn{flex:1 1 260px}
.finish .back{font-size:15px}
.saved{font-size:14px;color:var(--muted);margin:10px 0 0}

.sources{margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.sources h2{font-size:20px;margin:6px 0 10px}
.sources ul{font-size:14.5px;color:var(--muted);line-height:1.6}

.inline-cta{margin:36px 0 0;background:var(--night);color:#EEF5F1;border-radius:20px;padding:24px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center}
.inline-cta p{margin:0;color:#A9C1B5;font-size:16px;line-height:1.55}.inline-cta b{color:#EEF5F1;font-family:var(--display);font-size:20px;display:block;margin-bottom:4px}
@media (max-width:600px){.inline-cta{grid-template-columns:1fr}}

.finished{background:var(--glacier);border:1px solid var(--sprout);border-radius:20px;padding:24px;margin:0 0 28px}
.finished[hidden]{display:none}
.finished h2{font-size:26px;margin:0 0 8px}
.finished p{margin:0 0 14px}

footer{padding-block:40px 60px;color:var(--muted);font-size:13px}
footer .disc{max-width:90ch;line-height:1.6}

/* all-paths page */
.paths{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media (max-width:760px){.paths{grid-template-columns:minmax(0,1fr)}}
.pathcard{display:flex;flex-direction:column;background:var(--raised);border:1px solid var(--line);border-radius:20px;padding:24px;text-decoration:none;color:var(--ink)}
a.pathcard:hover{border-color:var(--sprout)}
.pathcard .n{font:600 12px/1 var(--mono);color:var(--sap-ink);letter-spacing:.08em;text-transform:uppercase}
.pathcard h3{font-size:26px;line-height:1.1;margin:12px 0 8px}
.pathcard p{margin:0 0 18px;font-size:16px;line-height:1.55;color:var(--muted)}
.pathcard .pbar{margin-top:auto}
.pathcard .bar{background:var(--glacier)}
.pathcard .pmeta{display:flex;justify-content:space-between;gap:12px;margin-top:10px;font:600 12px/1.2 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.pathcard .pmeta .go{color:var(--sprout-ink)}
.pathcard.soon{background:transparent;border-style:dashed}
.pathcard.soon h3{font-size:21px}
.pathcard.soon p{margin-bottom:0}
.hero p.crumbs{font:500 13px/1.3 var(--mono);color:#8FA99C;margin:0 0 14px}
.crumbs a{color:#B7D98F;text-decoration:none}.crumbs a:hover{text-decoration:underline}
.finished .btn+.btn{margin-left:10px}
@media (max-width:480px){.finished .btn{width:100%}.finished .btn+.btn{margin:10px 0 0}}

/* charts: validated pairs. light #3F6E23 + #E0A43A on #FFF; dark #4FA37A + #B37D26 on #132620 */
:root{--c1:#3F6E23;--c2:#E0A43A;--c0:#B9CCC3}
@media (prefers-color-scheme:dark){:root{--c1:#4FA37A;--c2:#B37D26;--c0:#5B786E}}
.chart{margin:8px 0 20px;padding:20px 22px;background:var(--raised);border:1px solid var(--line);border-radius:18px;position:relative}
.chart figcaption{font:700 17px/1.3 var(--display);letter-spacing:-.01em;margin-bottom:14px}
.chart .note{margin:14px 0 0}
.legend{display:flex;flex-wrap:wrap;gap:6px 18px;margin:-4px 0 14px;font-size:14px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend i{width:12px;height:12px;border-radius:3px;display:inline-block}
.bars{display:grid;gap:12px}
.brow{display:grid;gap:4px;border-radius:8px;outline-offset:4px}
.brow .bl{font-size:14.5px;line-height:1.35;color:var(--muted)}
.brow .bt{display:flex;align-items:center;gap:8px;min-height:22px}
.brow .bt i{display:block;height:20px;flex:0 0 calc((100% - var(--r,6em)) * var(--w) / 100);min-width:2px;border-radius:0 4px 4px 0}
.brow .bt.stack{gap:0}
.brow .bt.stack i{border-radius:0;margin-right:2px}
.brow .bt.stack i:last-of-type{border-radius:0 4px 4px 0;margin-right:8px}
.brow .bt b{font:600 15px/1 var(--sans);font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--ink)}
.k-a{background:var(--c1)}.k-b{background:var(--c2)}.k-m{background:var(--c0)}
@media (hover:hover){.brow:hover .bt i{filter:brightness(1.12)}}
.tip{position:absolute;z-index:5;max-width:min(280px,80vw);background:var(--night);color:#EEF5F1;font-size:13.5px;line-height:1.45;padding:8px 11px;border-radius:10px;pointer-events:none;box-shadow:0 6px 20px rgba(0,0,0,.25)}
@media (prefers-color-scheme:dark){.tip{background:#E8F0EB;color:#13211B}}
.tip[hidden]{display:none}
@media (forced-colors:active){.brow .bt i{background:CanvasText!important;forced-color-adjust:none}.k-m{opacity:.5}.k-b{background:repeating-linear-gradient(45deg,CanvasText 0 3px,Canvas 3px 6px)!important}}
@media (max-width:560px){.chart{padding:18px 16px}}

/* glossary + term chips */
.terms{margin:22px 0 0}
.terms .tag{font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:10px}
.terms a{display:inline-block;margin:0 8px 8px 0;padding:7px 12px;border:1px solid var(--line-2);border-radius:99px;font-size:14.5px;line-height:1.2;text-decoration:none;color:var(--ink);background:var(--raised)}
.terms a:hover{border-color:var(--sprout)}
.gloss-nav{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 28px}
.gloss-nav a{display:grid;place-items:center;min-width:38px;height:38px;border:1px solid var(--line-2);border-radius:10px;font:600 14px/1 var(--mono);text-decoration:none;color:var(--ink);background:var(--raised)}
.gloss-nav a:hover{border-color:var(--sprout)}
.gloss h2{font-size:22px;margin:30px 0 4px;color:var(--sprout-ink);font-family:var(--mono);font-weight:600;letter-spacing:.04em}
.gloss dl{margin:0}
.gloss dt{font:700 20px/1.25 var(--display);letter-spacing:-.015em;margin:20px 0 4px;scroll-margin-top:84px}
.gloss dd{margin:0 0 4px;padding:0 0 18px;border-bottom:1px solid var(--line)}
.gloss dd p{margin:0 0 6px}
.gloss dd .more{font-size:14.5px}
.gloss dt:target{background:var(--sap-wash);box-shadow:-8px 0 0 var(--sap-wash),8px 0 0 var(--sap-wash);border-radius:4px}

.illus .chart{border:0;padding:0;background:none;margin:14px 0 0}
.illus .chart figcaption{font-size:16px}

/* top-bar menu link, beta chip, feedback */
.top .nav{display:flex;align-items:center;gap:16px}
.top .nav .lk{font:600 15px/1 var(--sans);color:var(--ink);text-decoration:none;padding:8px 2px}
.top .nav .lk:hover{color:var(--sprout-ink)}
@media (max-width:480px){.top .nav{gap:12px}.top .nav .lk{font-size:14px}}
.meta .beta{color:#13211B;background:var(--sap);padding:3px 8px;border-radius:6px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:11px}
.fbk{border:1px dashed var(--line-2);border-radius:18px;padding:20px 22px;margin:22px 0 0}
.fbk .tag{font:600 12px/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--sap-ink)}
.fbk h2{margin:8px 0 12px;font-size:20px;letter-spacing:-.015em}
.fbk-btns{display:flex;flex-wrap:wrap;gap:10px}
.fbk-btns button{all:unset;box-sizing:border-box;cursor:pointer;border:1.5px solid var(--line-2);border-radius:12px;padding:11px 18px;font:600 15.5px/1.2 var(--sans);color:var(--ink);background:var(--raised)}
.fbk-btns button:focus-visible{outline:3px solid var(--sap);outline-offset:3px}
@media (hover:hover){.fbk-btns button:not([disabled]):hover{border-color:var(--sprout)}}
.fbk-btns button[aria-pressed="true"]{border-color:var(--sprout);background:var(--glacier)}
.fbk-btns button[disabled]{cursor:default;opacity:.75}
.fbk-btns button[aria-pressed="true"][disabled]{opacity:1}
.fbk-msg{margin:12px 0 0;font-size:15.5px}
.fbk-msg[hidden]{display:none}
.fbk-mail{margin:12px 0 0;font-size:15px;color:var(--muted)}
@media (max-width:560px){.fbk{padding:18px 16px}}
@media (max-width:360px){.top .wrap{padding-inline:14px;gap:8px}.brand{gap:7px}.brand svg{width:28px;height:28px}.brand b{font-size:16px}.top .nav{gap:9px}.top .nav .lk{font-size:13.5px}.top .btn{padding:9px 10px;font-size:13px}}
/* a11y (Oct 15): links in the always-dark CTA box and breadcrumb links need visible contrast */
.inline-cta p a{color:#B7D98F;text-decoration:underline;text-underline-offset:3px}
.crumbs a{text-decoration:underline;text-underline-offset:3px}
.btn.big{max-width:100%;white-space:normal;text-align:center}