/* basis */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
:root{
  --bg:#EDF0F2; --surface:#FFFFFF; --sunk:#E2E7EA; --ink:#15212B; --muted:#56636E; --line:#C9D1D7;
  --phase:#8A4A1C; --phase-soft:#F3E6DB; --neutral:#2A5C9E; --neutral-soft:#DFE8F4;
  --earth-g:#2F8A3C; --earth-y:#E3C21C; --ok:#2F7A3A; --ok-soft:#DDEEDF; --bad:#B3321F; --bad-soft:#F6DEDA; --warn:#9A6A00; --warn-soft:#F6EBCC;
  --display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  color-scheme:dark;
  --bg:#12181D; --surface:#1B232A; --sunk:#232D35; --ink:#E6EBEF; --muted:#9AA7B2; --line:#34414C;
  --phase:#E09A62; --phase-soft:#3A2A1E; --neutral:#7FA8E0; --neutral-soft:#1E2B3D;
  --ok:#6CC27A; --ok-soft:#1C3322; --bad:#F08573; --bad-soft:#3D221E; --warn:#E3B54A; --warn-soft:#3A3019;
}}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#12181D; --surface:#1B232A; --sunk:#232D35; --ink:#E6EBEF; --muted:#9AA7B2; --line:#34414C;
  --phase:#E09A62; --phase-soft:#3A2A1E; --neutral:#7FA8E0; --neutral-soft:#1E2B3D;
  --ok:#6CC27A; --ok-soft:#1C3322; --bad:#F08573; --bad-soft:#3D221E; --warn:#E3B54A; --warn-soft:#3A3019;
}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6;padding-inline:16px}
.wrap{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:250px minmax(0,1fr);gap:40px;padding-block:28px 64px}
@media (max-width:860px){.wrap{grid-template-columns:minmax(0,1fr);gap:20px}}
main{min-width:0}
h1,h2,h3{font-family:var(--display);text-wrap:balance;line-height:1.1;margin:0}
h1{font-size:clamp(2.4rem,6vw,3.6rem);font-weight:700;letter-spacing:.01em;text-transform:uppercase}
h2{font-size:clamp(1.45rem,6.5vw,2rem);hyphens:auto;overflow-wrap:break-word;font-weight:700;text-transform:uppercase;letter-spacing:.02em}
h3{font-size:1.3rem;font-weight:600;margin-top:8px}
p{margin:0;max-width:68ch}
code,.mono{font-family:var(--mono);font-size:.92em}
a{color:var(--neutral)}
:focus-visible{outline:3px solid var(--neutral);outline-offset:2px;border-radius:3px}

/* wire stripe signature */
.wire{display:flex;height:6px;border-radius:3px;overflow:hidden;width:120px}
.wire span{flex:1}
.w-ph{background:var(--phase)} .w-n{background:var(--neutral)}
.w-pe{background:repeating-linear-gradient(90deg,var(--earth-g) 0 8px,var(--earth-y) 8px 16px)}

/* nav */
nav.side{position:sticky;top:calc(env(safe-area-inset-top,0px) + 20px);align-self:start;display:flex;flex-direction:column;gap:14px}
@media (max-width:860px){nav.side{position:static}}
.brand{display:flex;flex-direction:column;gap:8px}
.brand b{font-family:var(--display);font-size:1.5rem;text-transform:uppercase;letter-spacing:.04em}
.prog{font-size:.85rem;color:var(--muted)}
.bar{height:8px;background:var(--sunk);border-radius:4px;overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;background:var(--phase);width:0;transition:width .4s}
nav.side ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
@media (max-width:860px){nav.side ol{flex-direction:row;flex-wrap:wrap;gap:6px}}
nav.side a{display:flex;gap:10px;align-items:baseline;padding:6px 8px;border-radius:6px;text-decoration:none;color:var(--ink);font-size:.93rem}
nav.side a:hover{background:var(--sunk)}
nav.side a .n{font-family:var(--mono);font-size:.8rem;color:var(--muted);min-width:1.6em}
nav.side a.done .n{color:var(--ok)}
nav.side a.done::after{content:"✓";margin-left:auto;color:var(--ok);font-weight:600}
@media (max-width:860px){nav.side a{background:var(--surface);border:1px solid var(--line)}}

/* header */
header.hero{display:flex;flex-direction:column;gap:16px;padding-bottom:28px;border-bottom:2px solid var(--ink);margin-bottom:12px}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.lede{font-size:1.1rem;color:var(--ink)}
.facts{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-family:var(--mono);font-size:.8rem;padding:3px 10px;border-radius:999px;background:var(--sunk);color:var(--ink)}

/* modules */
section.mod{padding-block:40px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:18px;scroll-margin-top:16px}
.modhead{display:flex;flex-direction:column;gap:6px}
.modhead .num{font-family:var(--mono);color:var(--phase);font-size:.85rem;letter-spacing:.06em}
.goals{font-size:.92rem;color:var(--muted)}
.goals b{color:var(--ink);font-weight:600}
ul.tight{margin:0;padding-left:1.2em;max-width:68ch;display:flex;flex-direction:column;gap:4px}

/* rule box */
.rule{background:var(--surface);border:1px solid var(--line);border-left:6px solid var(--phase);border-radius:4px;padding:14px 16px;display:flex;flex-direction:column;gap:8px;max-width:760px}
.rule .tag{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--phase)}
.why{background:var(--neutral-soft);border-radius:4px;padding:12px 16px;max-width:760px;display:flex;flex-direction:column;gap:6px}
.why .tag{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--neutral)}
.danger{background:var(--bad-soft);border-radius:4px;padding:12px 16px;max-width:760px;display:flex;flex-direction:column;gap:6px}
.danger .tag{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--bad)}
.tip{background:var(--warn-soft);border-radius:4px;padding:12px 16px;max-width:760px;display:flex;flex-direction:column;gap:6px}
.tip .tag{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--warn)}

/* tables */
.tbl{overflow-x:auto;max-width:min(100%,760px)}
table{width:100%;border-collapse:collapse;font-size:.93rem;min-width:520px;background:var(--surface)}
th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);background:var(--sunk);font-weight:500}
td.num{font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}

/* figures */
figure{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:16px;max-width:760px;overflow-x:auto}
figcaption{font-size:.85rem;color:var(--muted);margin-top:8px}
svg text{font-family:var(--body)}

/* steps */
ol.steps{margin:0;padding:0;list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:10px;max-width:760px}
ol.steps li{counter-increment:s;display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:start}
ol.steps li::before{content:counter(s);font-family:var(--display);font-weight:700;font-size:1.2rem;width:30px;height:30px;border-radius:50%;background:var(--ink);color:var(--bg);display:grid;place-items:center}

/* quiz */
.quiz{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:18px;display:flex;flex-direction:column;gap:18px;max-width:760px}
.quiz h3{margin:0;display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.quiz h3 small{font-family:var(--mono);font-size:.8rem;color:var(--muted);font-weight:400}
.q{display:flex;flex-direction:column;gap:8px}
.q p.pr{font-weight:600}
.opts{display:flex;flex-direction:column;gap:6px}
.opts button{font:inherit;text-align:left;padding:9px 12px;border-radius:5px;border:1px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer}
.opts button:hover:not(:disabled){border-color:var(--ink)}
.opts button:disabled{cursor:default}
.opts button.right{background:var(--ok-soft);border-color:var(--ok)}
.opts button.wrong{background:var(--bad-soft);border-color:var(--bad)}
.fb{font-size:.92rem;padding:8px 12px;border-radius:4px;background:var(--sunk)}
.fb b{margin-right:4px}
.reset{align-self:flex-start;font:inherit;font-size:.85rem;background:none;border:none;color:var(--muted);text-decoration:underline;cursor:pointer;padding:0}

/* checker tool */
.tool{background:var(--surface);border:2px solid var(--ink);border-radius:6px;padding:18px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;max-width:860px}
@media (max-width:700px){.tool{grid-template-columns:1fr}}
.tool .fields{display:flex;flex-direction:column;gap:12px}
.tool label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;font-weight:500}
.tool select,.tool input[type=number]{font:inherit;padding:8px 10px;border-radius:5px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.tool .check{flex-direction:row;align-items:center;gap:8px;font-weight:400}
.verdict{display:flex;flex-direction:column;gap:8px}
.verdict .stamp{font-family:var(--display);font-size:1.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.03em}
.verdict .stamp.ok{color:var(--ok)} .verdict .stamp.nok{color:var(--bad)}
.verdict ul{margin:0;padding-left:1.1em;display:flex;flex-direction:column;gap:6px;font-size:.93rem}
.verdict li.ok::marker{color:var(--ok)} .verdict li.nok::marker{color:var(--bad)} .verdict li.info::marker{color:var(--muted)}
.calc{display:flex;flex-wrap:wrap;gap:12px;align-items:end;background:var(--sunk);padding:12px;border-radius:5px;max-width:760px}
.calc label{display:flex;flex-direction:column;gap:4px;font-size:.85rem}
.calc input{font:inherit;width:120px;padding:6px 8px;border-radius:4px;border:1px solid var(--line);background:var(--surface);color:var(--ink)}
.calc output{font-family:var(--mono);font-size:1.05rem}

.sim{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:12px 16px;max-width:760px;overflow-x:auto}
.sim svg{min-width:460px;display:block}
.sim .hit{fill:transparent;cursor:pointer}
.sim .hit:hover{fill:var(--sunk);opacity:.6}
.sim .hit:focus-visible{outline:none;stroke:var(--neutral);stroke-width:2.5}
.sim .status{font-size:.9rem;color:var(--muted);margin-top:6px}

/* klemmen */
.klem{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:12px 16px;max-width:760px;display:flex;flex-direction:column;gap:10px}
.klem-tabs{display:flex;flex-wrap:wrap;gap:6px}
.klem-tabs button,.addbtn,.nextbtn{font:inherit;font-size:.88rem;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer}
.klem-tabs button[aria-selected="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.klem-view{overflow-x:auto}.klem-view svg{min-width:520px;display:block}
.klem .status{font-size:.9rem;color:var(--muted);margin-top:6px}
/* symbolen */
.symgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;max-width:760px}
.sym{background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:10px;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;font-size:.85rem}
.flash{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:16px;max-width:760px;display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start}
@media (max-width:560px){.flash{grid-template-columns:1fr}}
.flash-card{background:var(--bg);border-radius:6px;padding:16px;display:grid;place-items:center}
.flash-side{display:flex;flex-direction:column;gap:10px}
.flash-score{font-family:var(--mono);font-size:.85rem;color:var(--muted)}
.nextbtn{align-self:flex-start;background:var(--ink);color:var(--bg);border-color:var(--ink)}
/* wegwijzer */
.tree{background:var(--surface);border:2px solid var(--ink);border-radius:6px;padding:18px;max-width:760px;display:flex;flex-direction:column;gap:12px}
.tq{font-weight:600;font-size:1.05rem}
.crumbs{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px;font-size:.8rem}
.crumbs li{background:var(--sunk);padding:2px 10px;border-radius:999px;color:var(--muted)}
.res{display:flex;flex-direction:column;gap:8px;padding:12px 14px;border-radius:5px}
.res.ok{background:var(--ok-soft)}.res.warn{background:var(--warn-soft)}.res.stop{background:var(--bad-soft)}
.pill{align-self:flex-start;font-family:var(--mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;padding:2px 10px;border-radius:999px;color:var(--bg)}
.res.ok .pill{background:var(--ok)}.res.warn .pill{background:var(--warn)}.res.stop .pill{background:var(--bad)}
.treenav{display:flex;gap:16px}
/* planner */
.planner{display:flex;flex-direction:column;gap:16px;max-width:860px}
.pl-table{min-width:600px}
.pl-table td{padding:4px 6px;vertical-align:middle}
.pl-table input,.pl-table select{font:inherit;font-size:.9rem;padding:5px 6px;border-radius:4px;border:1px solid var(--line);background:var(--bg);color:var(--ink);width:100%}
.pl-table input[type=number]{width:70px;font-family:var(--mono)}
.pl-table .rm{font:inherit;background:none;border:none;color:var(--muted);font-size:1.2rem;cursor:pointer;padding:2px 8px}
.pl-table th{position:relative}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.addbtn{align-self:flex-start;margin-top:8px}
.pl-dev{border:1px solid var(--line);border-radius:6px;padding:10px 14px;display:flex;flex-wrap:wrap;gap:8px 18px;margin:0}
.pl-dev legend{font-size:.85rem;font-weight:600;padding:0 4px}
.pl-dev #plDev{display:flex;flex-wrap:wrap;gap:8px 18px}
.pl-dev .check{display:flex;gap:6px;align-items:center;font-size:.9rem}
.psum{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:12px}
@media (max-width:480px){.pgrid{grid-template-columns:1fr}}
.pcard{background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--neutral);border-radius:5px;overflow:hidden}
.pcard.vast{border-top-color:var(--phase)}.pcard.laad{border-top-color:var(--warn)}
.ph{display:flex;justify-content:space-between;gap:8px;padding:8px 12px;background:var(--sunk);font-size:.9rem}
.ph span{font-family:var(--mono);font-size:.78rem;color:var(--muted)}
.pcard ul{list-style:none;margin:0;padding:0}
.pcard li{display:grid;grid-template-columns:28px 1fr auto;gap:2px 8px;padding:7px 12px;border-top:1px solid var(--line);font-size:.87rem}
.pcard .lt{font-family:var(--mono);font-weight:600;grid-row:span 2}
.pcard .spec{font-family:var(--mono);font-size:.78rem;color:var(--muted)}
.pcard .pts{font-family:var(--mono);font-size:.78rem;color:var(--muted);grid-column:3;grid-row:1}
.pcard .dsc{grid-column:2}
.pnotes{margin:12px 0 0;padding-left:1.2em;font-size:.88rem;color:var(--muted);display:flex;flex-direction:column;gap:4px}
.plactions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.plsaved{font-size:.85rem;color:var(--muted)}
#plSchema{display:block}
footer{padding-top:32px;font-size:.88rem;color:var(--muted);display:flex;flex-direction:column;gap:8px}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}