/* Cleared for ICAO: styles shared by every page (tokens, type, header, footer, buttons, page sections).
   The test runner's own styles live in mock-test.html. Layout: one centred column, a flight-deck clipboard look. */
:root{
  --paper:#e9eef1; --panel:#ffffff; --ink:#13202b; --muted:#566673; --line:#cdd6dc; --soft:#dfe6eb;
  --accent:#c2660f; --accent-ink:#ffffff; --sky:#1d5a85; --ok:#2e7a4c; --bad:#b0373a;
  --chart-bg:#f6f2e4; --twy:#c99a1c;
  /* chart marks (checked for contrast and colour-blind separation): base bars and the highlighted one */
  --viz-base:#2b6cb0; --viz-hi:#c2660f;
  --f-disp:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --page:1080px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#0e151b; --panel:#16212a; --ink:#e2e9ee; --muted:#97a7b4; --line:#2b3945; --soft:#1d2a34;
  --accent:#e8913a; --accent-ink:#1a0f04; --sky:#7ab6e0; --ok:#62c48e; --bad:#e67a7a;
  --chart-bg:#1a2530; --twy:#c9a03a; --viz-base:#3b82c9; --viz-hi:#d47b26; color-scheme:dark }}
:root[data-theme="dark"]{
  --paper:#0e151b; --panel:#16212a; --ink:#e2e9ee; --muted:#97a7b4; --line:#2b3945; --soft:#1d2a34;
  --accent:#e8913a; --accent-ink:#1a0f04; --sky:#7ab6e0; --ok:#62c48e; --bad:#e67a7a;
  --chart-bg:#1a2530; --twy:#c9a03a; --viz-base:#3b82c9; --viz-hi:#d47b26; color-scheme:dark }

body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.55 var(--f-body)}
*{box-sizing:border-box}
img{max-width:100%}
a{color:var(--sky)}
[hidden]:not([hidden=until-found i]){display:none!important}
.wrap{max-width:var(--page);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
main.wrap{padding-block:28px 72px}
h1,h2,h3{font-family:var(--f-disp);font-weight:700;line-height:1.1;text-wrap:balance;margin:0;letter-spacing:.01em}
h1{font-size:2.6rem;text-transform:uppercase}
h2{font-size:1.6rem;text-transform:uppercase}
h3{font-size:1.2rem}
p{margin:0}
.muted{color:var(--muted)}
.mono{font-family:var(--f-mono)}
.label{font:600 .72rem/1 var(--f-body);text-transform:uppercase;letter-spacing:.09em;color:var(--muted)}
.stack{display:flex;flex-direction:column;gap:14px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spread{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.lead{font-size:1.08rem;max-width:62ch}

/* buttons, panels, form fields */
.btn{font:600 .92rem/1 var(--f-body);padding:11px 16px;border-radius:6px;border:1.5px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.btn:hover{background:var(--soft)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.07);background:var(--accent)}
.btn.small{padding:7px 11px;font-size:.82rem}
.btn.big{padding:14px 22px;font-size:1rem}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn:focus-visible,a:focus-visible,textarea:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.linkbtn{background:none;border:0;color:var(--sky);font:inherit;cursor:pointer;padding:0;text-decoration:underline}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:20px}
textarea,input[type=text],select{width:100%;font:15px/1.5 var(--f-body);color:var(--ink);background:var(--panel);border:1.5px solid var(--line);border-radius:6px;padding:10px 12px}
textarea{min-height:110px;resize:vertical}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.pnum{font:700 2rem/1 var(--f-disp);color:var(--accent)}
.tablewrap{overflow-x:auto}
section{margin-top:48px}
section > h2{margin-bottom:14px}

/* site header and navigation */
.site-head{background:var(--panel);border-bottom:1px solid var(--line)}
.site-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.brand{display:flex;align-items:baseline;gap:10px;color:inherit;text-decoration:none}
.brand b{font:700 1.45rem/1 var(--f-disp);letter-spacing:.06em}
.brand span{font:500 .72rem/1 var(--f-mono);color:var(--muted)}
.site-nav{display:flex;gap:2px}
.site-nav a{font:600 .9rem/1 var(--f-body);color:var(--ink);text-decoration:none;padding:12px 12px;border-radius:6px;white-space:nowrap}
.site-nav a:hover{background:var(--soft)}
.site-nav a[aria-current=page]{color:var(--accent);box-shadow:inset 0 -2px 0 var(--accent);border-radius:6px 6px 0 0}
.site-nav a.nav-cta{background:var(--accent);color:var(--accent-ink);margin-left:6px}
.site-nav a.nav-cta[aria-current=page]{box-shadow:none;border-radius:6px}
@media (max-width:900px){
  .site-bar{flex-wrap:wrap;gap:4px;padding-top:12px}
  .brand span{display:none}
  .site-nav{width:100%;flex-wrap:wrap;margin:0 -10px}
  .site-nav a{padding:11px 10px}
}

/* site footer */
.site-foot{border-top:1px solid var(--line);background:var(--panel);padding-block:28px;margin-top:40px;font-size:.88rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px 40px;align-items:start}
.foot-grid b{font:700 1.15rem/1 var(--f-disp);letter-spacing:.06em;display:block;margin-bottom:6px}
.foot-nav{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:flex-end}
.foot-nav a{color:var(--ink)}
.foot-small{grid-column:1/-1;color:var(--muted);font-size:.8rem}

/* page intro and call to action band */
.page-intro{display:flex;flex-direction:column;gap:12px;margin-bottom:8px}
.band{background:var(--ink);color:var(--paper);border-radius:10px;padding:28px;display:flex;gap:16px 24px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.band h2{color:inherit}
.band p{color:inherit;opacity:.85;max-width:56ch}
.band .btn.primary{flex:none}

/* home hero */
.home-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:32px;align-items:center;padding-block:12px 8px}
.home-hero h1{font-size:3.1rem}
.home-hero .lead{margin-top:14px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.demo{margin:0}
.demo .bezel{background:#15181b;border-radius:14px;padding:12px 12px 24px;position:relative;box-shadow:0 18px 40px -18px rgba(0,0,0,.45)}
.demo .bezel::after{content:"";position:absolute;left:50%;bottom:9px;width:6px;height:6px;margin-left:-3px;border-radius:50%;background:#3ad16b}
.demo svg{display:block;width:100%;height:auto;background:#fff}
.demo figcaption{font-size:.82rem;color:var(--muted);margin-top:10px;text-align:center}

/* stat tiles: the value in the body sans, never the display face */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.stat .v{font:600 2.1rem/1.1 var(--f-body);color:var(--ink);display:block}
.stat .l{font-size:.9rem;color:var(--muted)}

/* cards: a big title and one short line, the building block of the content pages.
   .k is a small label above the title (a time, a step number); .hl marks the main ones */
.cards{display:grid;gap:14px;grid-template-columns:repeat(3,minmax(0,1fr))}
.cards.c2{grid-template-columns:repeat(2,minmax(0,1fr))}
.cards.c3{grid-template-columns:repeat(3,minmax(0,1fr))}
.cards.c4{grid-template-columns:repeat(4,minmax(0,1fr))}
.cards.c5{grid-template-columns:repeat(5,minmax(0,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:22px 22px 20px;display:flex;flex-direction:column;gap:6px;min-width:0}
.card h3{font-size:1.65rem;text-transform:uppercase;line-height:1.02}
.card p{color:var(--muted)}
.card .k{font:600 .74rem/1 var(--f-mono);letter-spacing:.07em;text-transform:uppercase;color:var(--accent)}
.card .num{font:700 2.6rem/1 var(--f-disp);color:var(--accent)}
.card.hl{border-color:var(--accent);box-shadow:inset 0 3px 0 var(--accent)}
.ico{width:46px;height:46px;border-radius:12px;background:var(--soft);display:grid;place-items:center;color:var(--accent);flex:none;margin-bottom:8px}
.ico svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* section heading with a time or note on the right */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:6px 16px;flex-wrap:wrap;margin-bottom:14px}
.sec-head h2{margin:0}
.sec-head .t{font:500 .9rem/1 var(--f-mono);color:var(--sky)}

/* exam timeline: one bar, each part as wide as its time */
.timeline{display:flex;gap:2px;margin:6px 0 4px}
.timeline > div{background:var(--viz-base);color:#fff;border-radius:0;padding:14px 14px 12px;min-width:0}
.timeline > div:first-child{border-radius:6px 0 0 6px}
.timeline > div:last-child{border-radius:0 6px 6px 0}
.timeline b{display:block;font:700 1.15rem/1.1 var(--f-disp);text-transform:uppercase;letter-spacing:.02em;margin-top:4px}
.timeline span{display:block;font:500 .8rem/1.3 var(--f-mono);opacity:.92}
.timeline-axis{display:flex;justify-content:space-between;font:500 .75rem/1 var(--f-mono);color:var(--muted)}

/* scoring chart: one series (a sample candidate), horizontal bars, the lowest one highlighted */
.scorechart{display:grid;grid-template-columns:120px minmax(0,1fr);gap:8px 12px;align-items:center}
.scorechart .ax{grid-column:2;position:relative;height:14px;font:500 .75rem/1 var(--f-mono);color:var(--muted);font-variant-numeric:tabular-nums}
.scorechart .ax span{position:absolute;top:0;transform:translateX(-50%)}
.scorechart .nm{font-size:.9rem;text-align:right}
.scorechart .tr{position:relative;height:24px;background:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px calc(100% / 6));background-position:-1px 0;outline:none}
.scorechart .bar{position:absolute;left:0;top:3px;height:18px;width:calc(var(--v) / 6 * 100%);background:var(--viz-base);border-radius:0 4px 4px 0}
.scorechart .tr.hi .bar{background:var(--viz-hi)}
.scorechart .val{position:absolute;top:50%;left:calc(var(--v) / 6 * 100% + 8px);transform:translateY(-50%);font:600 .85rem/1 var(--f-body);color:var(--ink);white-space:nowrap}
.scorechart .tip{position:absolute;bottom:calc(100% + 6px);left:0;display:none;width:max-content;max-width:min(280px,70vw);background:var(--ink);color:var(--paper);font-size:.8rem;line-height:1.35;padding:6px 9px;border-radius:6px;pointer-events:none;z-index:2}
.scorechart .tr:hover .tip,.scorechart .tr:focus .tip{display:block}
.result-line{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.result-line .big{font:600 2rem/1 var(--f-body)}
.swatch{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:6px}

/* Part 1: a toggle picks the scenario pair; each scenario is a card with its steps as a vertical flow.
   A hidden flow does not count, so the "Scenario n" counter follows the pair shown */
.pair-row{display:flex;align-items:center;gap:10px 14px;flex-wrap:wrap;margin-bottom:14px}
.seg{display:inline-flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:999px;background:var(--panel)}
.seg label{position:relative;cursor:pointer}
.seg input{position:absolute;inset:0;width:100%;height:100%;opacity:0;margin:0;cursor:pointer}
.seg span{display:block;padding:8px 16px;border-radius:999px;font:600 .9rem/1.2 var(--f-body);color:var(--muted);text-align:center}
.seg input:checked + span{background:var(--ink);color:var(--paper)}
.seg input:focus-visible + span{outline:2px solid var(--sky);outline-offset:2px}
.flows{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;counter-reset:sc}
.p1:has(input[value="de"]:checked) .flow.arr,.p1:has(input[value="ea"]:checked) .flow.dep{display:none}
.flow{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 22px;counter-increment:sc;min-width:0}
.flow-head{display:flex;align-items:center;gap:14px;padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.flow-head .ico{margin:0;background:var(--ink);color:var(--paper)}
.flow-head .sc{display:block;margin-bottom:4px}
.flow-head .sc::before{content:"Scenario " counter(sc);font:600 .74rem/1 var(--f-mono);letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
.flow-head h3{font-size:1.65rem;text-transform:uppercase;line-height:1.02}
.steps{list-style:none;margin:0;padding:0}
.steps li{position:relative;display:grid;grid-template-columns:40px minmax(0,1fr);column-gap:14px;padding-bottom:16px}
.steps li:last-child{padding-bottom:0}
.steps li:not(:last-child)::after{content:"";position:absolute;left:19px;top:44px;bottom:4px;width:2px;background:var(--line)}
.steps .ico{width:40px;height:40px;margin:0;grid-row:span 2;border-radius:10px}
.steps .ico svg{width:22px;height:22px}
.steps b{font:700 1.2rem/1.15 var(--f-disp);text-transform:uppercase;letter-spacing:.01em;align-self:end}
.steps p{color:var(--muted)}

/* scoring: compact criteria cards beside the example chart */
.crit .card{padding:16px 18px}
.crit .card h3{font-size:1.4rem}

/* ICAO levels: Level 6 is the goal, Levels 1-3 are one warning card */
.cards.levels{grid-template-columns:repeat(3,minmax(0,1fr))}
.levels .card .num{color:var(--ink)}
.levels .lv6{border:2px solid var(--accent);background:color-mix(in srgb,var(--accent) 9%,var(--panel))}
.levels .lv6 .num{color:var(--accent);font-size:3.4rem}
.pill{align-self:flex-start;font:600 .72rem/1 var(--f-mono);letter-spacing:.07em;text-transform:uppercase;background:var(--ink);color:var(--paper);padding:5px 9px;border-radius:999px;margin-bottom:4px}
.levels .alert{grid-column:1/-1;border-color:var(--bad);background:color-mix(in srgb,var(--bad) 7%,var(--panel));box-shadow:inset 4px 0 0 var(--bad);gap:10px}
.alert-head{display:flex;align-items:center;gap:14px}
.alert-head .ico{margin:0;color:var(--bad);background:color-mix(in srgb,var(--bad) 14%,var(--panel))}
.alert p{color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{border:1px solid color-mix(in srgb,var(--bad) 45%,transparent);border-radius:999px;padding:4px 11px;font-size:.88rem}

/* our goal: a big Level 6 beside the two promises */
.goal{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:14px}
.goal-badge{grid-row:span 2;justify-content:center;align-items:center;text-align:center;gap:2px}
.goal-badge b{font:700 7.5rem/.85 var(--f-disp);color:var(--accent)}
.goal-badge p{font:600 1.3rem/1 var(--f-disp);text-transform:uppercase;letter-spacing:.04em}

/* blog and about placeholders */
.soon{border:1.5px dashed var(--line);border-radius:10px;padding:28px;text-align:center;color:var(--muted)}

@media (max-width:900px){
  .home-hero{grid-template-columns:minmax(0,1fr)}
  .stats,.cards,.cards.c4,.cards.c5{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  h1,.home-hero h1{font-size:2.1rem}
  .card h3{font-size:1.45rem}
  .grid2,.grid3,.foot-grid{grid-template-columns:minmax(0,1fr)}
  .foot-nav{justify-content:flex-start}
  .timeline{flex-direction:column}
  .timeline > div:first-child{border-radius:6px 6px 0 0}
  .timeline > div:last-child{border-radius:0 0 6px 6px}
  .timeline-axis{display:none}
  .flows{grid-template-columns:minmax(0,1fr)}
  .seg{display:flex;width:100%}
  .seg label{flex:1}
  .seg span{padding:8px 10px;font-size:.84rem}
  .scorechart{grid-template-columns:96px minmax(0,1fr)}
  .band{padding:22px}
  .cards.c3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:560px){
  .cards,.cards.c2,.cards.c4,.cards.c5{grid-template-columns:minmax(0,1fr)}
  /* one column: the icon sits beside the text so cards stay short */
  .card:has(> .ico){display:grid;grid-template-columns:46px minmax(0,1fr);column-gap:16px;row-gap:4px;align-content:start}
  .card:has(> .ico) > .ico{grid-row:span 3;margin:0}
  .cards.levels{grid-template-columns:minmax(0,1fr)}
  .cards.crit{grid-template-columns:repeat(2,minmax(0,1fr))}
  .crit .card{padding:14px 14px}
  .crit .card h3{font-size:1.1rem}
  .goal{grid-template-columns:minmax(0,1fr)}
  .goal-badge{grid-row:auto;padding-block:18px}
  .goal-badge b{font-size:5.5rem}
}