/* Layout: one checklist card per screen, cockpit-card look (paper, ink, dotted leaders), section tabs on the right on iPad, sticky action bar at the bottom */
:root{
  --paper:#fffbe6; --card:#ffffff; --ink:#111111; --ink-2:#3a3a3a; --rule:#e6dfc0;
  --red:#b3261e; --red-wash:#fde8e6; --amb:#c27a00; --amb-wash:#fff3d6;
  --grn:#1d6b35; --grn-wash:#d9efdd; --off:#a8a28a; --off-bg:#faf6e2;
  --font:'Atkinson Hyperlegible','Verdana','DejaVu Sans',sans-serif;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{background:var(--paper)}
body{color:var(--ink);font-family:var(--font);font-size:17px;-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
.wrap{max-width:720px;margin:0 auto;padding-block:14px 0;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
@media (min-width:700px){.wrap{padding-right:max(96px,env(safe-area-inset-right,0px))}}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}
.home{display:inline-flex;align-items:center;gap:8px;border:2.5px solid var(--ink);border-radius:10px;padding:6px 14px 6px 8px;font-weight:700;font-size:17px;background:var(--card)}
.home img{height:30px;width:auto}
.crumb{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--ink-2);text-align:right}
/* section tabs */
.tabs{display:flex;gap:8px;margin-bottom:12px}
.tab{flex:1;text-align:center;border:2.5px solid var(--c);color:var(--c);background:var(--card);border-radius:10px;padding:8px 4px;font-weight:700;font-size:13px;letter-spacing:.12em}
.tab.on{background:var(--c);color:#fff}
@media (min-width:700px){
  .tabs{position:fixed;right:env(safe-area-inset-right,0px);top:50%;transform:translateY(-50%);flex-direction:column;width:72px;margin:0;z-index:5}
  .tab{height:200px;border-right:none;border-radius:14px 0 0 14px;display:flex;align-items:center;justify-content:center;padding:0}
  .tab span{writing-mode:vertical-rl;font-size:16px;letter-spacing:.14em}
}
/* card */
.card{border:3px solid var(--ink);border-radius:14px;background:var(--card);overflow:hidden}
.band{color:#fff;padding:14px 18px;font-size:clamp(20px,4.6vw,27px);font-weight:700;letter-spacing:.03em;display:flex;justify-content:space-between;align-items:center;gap:10px;text-wrap:balance}
.mem{flex:none;font-size:12px;background:#fff;color:var(--ink);border-radius:20px;padding:4px 10px;letter-spacing:.06em}
.body{padding:6px 16px 14px}
.sub{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--ink-2);border-bottom:2px solid var(--ink);margin:14px 0 2px;padding-bottom:3px}
.it{display:flex;align-items:baseline;width:100%;font-size:clamp(17px,3.6vw,21px);padding:8px 0;border:0;border-bottom:1px solid var(--rule);background:none;text-align:left;min-width:0}
.k{white-space:nowrap}
.d{flex:1;min-width:12px;border-bottom:3px dotted #8a8a8a;margin:0 10px;transform:translateY(-5px)}
.v{font-weight:700;text-align:right}
button.it{cursor:pointer;align-items:center;padding:10px 4px;border-radius:6px}
button.it .d{transform:none;align-self:center}
.box{flex:none;width:30px;height:30px;border:2.5px solid var(--ink);border-radius:7px;margin-right:14px;display:grid;place-items:center;background:var(--card)}
.box svg{width:20px;height:20px;opacity:0}
button.it[aria-checked="true"]{background:var(--grn-wash)}
button.it[aria-checked="true"] .box{background:var(--grn);border-color:var(--grn)}
button.it[aria-checked="true"] .box svg{opacity:1}
button.it[aria-checked="true"] .k,button.it[aria-checked="true"] .v{color:var(--grn)}
button.it.missed{outline:3px solid var(--amb);outline-offset:-3px;background:var(--amb-wash)}
button.it:focus-visible,.btn:focus-visible,.act:focus-visible,.tab:focus-visible,.home:focus-visible{outline:3px solid #2a5bd7;outline-offset:2px}
.note{font-size:16px;line-height:1.4;background:var(--paper);border-left:5px solid var(--amb);padding:9px 12px;margin:10px 0}
.warn{font-size:16px;line-height:1.4;background:var(--red-wash);border-left:5px solid var(--red);padding:9px 12px;margin:12px 0 4px;font-weight:700}
.warn a,.note a{text-decoration:underline}
.warn a{color:var(--red)}
/* action bar */
.bar{position:sticky;bottom:0;margin-top:14px;padding:12px 0 calc(12px + env(safe-area-inset-bottom,0px));background:var(--paper);display:flex;align-items:center;gap:10px;border-top:2px solid var(--rule)}
.act{border:2.5px solid var(--ink);border-radius:10px;background:var(--card);padding:10px 14px;font-weight:700;font-size:15px;cursor:pointer;white-space:nowrap}
.act.clear{border-color:var(--red);color:var(--red)}
.act.next{background:var(--ink);color:#fff;display:flex;flex-direction:column;align-items:flex-end;line-height:1.15;font-size:18px;text-align:right}
.act.next small{font-size:11px;font-weight:400;letter-spacing:.04em}
.act.next.done{background:var(--grn);border-color:var(--grn)}
.count{flex:1;text-align:center;font-weight:700;font-size:15px;color:var(--ink-2);font-variant-numeric:tabular-nums;min-width:0}
.count.done{color:var(--grn)}
.prog{height:6px;background:var(--rule);border-radius:3px;margin-top:5px;overflow:hidden}
.prog i{display:block;height:100%;background:var(--grn);transition:width .2s}
/* missed-items panel */
.panel{margin-top:14px;border:3px solid var(--amb);border-radius:14px;background:var(--amb-wash);padding:14px 16px}
.panel h3{margin:0 0 6px;font-size:19px}
.panel ul{margin:0 0 12px;padding-left:20px;font-size:17px;line-height:1.5}
.panel .row{display:flex;gap:10px;flex-wrap:wrap}
.panel .act.go{border-color:var(--amb);color:var(--ink)}
/* home */
.hero{display:flex;align-items:center;gap:16px;border-bottom:3px solid var(--ink);padding:6px 0 14px;margin-bottom:6px}
.hero img{height:72px;width:auto}
.h1{font-size:clamp(24px,5vw,32px);font-weight:700;letter-spacing:.06em}
.h2{font-size:16px;margin-top:2px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.grid{grid-template-columns:1fr}}
.grp{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--c);margin:14px 0 6px}
.btn{display:flex;align-items:center;justify-content:space-between;gap:8px;border:2.5px solid var(--c);border-left-width:12px;border-radius:10px;background:var(--card);padding:8px 12px;font-size:16px;font-weight:700;margin-bottom:7px;min-height:44px}
.chip{flex:none;font-size:12px;font-weight:700;border-radius:20px;padding:3px 8px;background:var(--paper);color:var(--ink-2);font-variant-numeric:tabular-nums}
.chip.done{background:var(--grn);color:#fff}
.legend{font-size:13px;color:var(--ink-2);margin-top:10px;line-height:1.6}
.reset{margin-top:16px}
.confirm{margin-top:10px;border:2.5px solid var(--red);border-radius:12px;background:var(--red-wash);padding:12px 14px}
.confirm p{margin:0 0 10px;font-weight:700}
.foot{font-size:12px;color:var(--ink-2);margin:16px 0 18px;line-height:1.5}
/* reference tables */
.sp{width:100%;border-collapse:collapse;font-size:clamp(17px,3.6vw,21px);margin-top:4px}
.sp th{font-size:12px;letter-spacing:.12em;text-align:right;padding:4px 8px;color:var(--ink-2);border-bottom:2px solid var(--ink)}
.sp td{padding:7px 8px;border-bottom:1px solid var(--rule)}
.sp .s{font-weight:700;white-space:nowrap}.sp .m{font-size:14px;color:var(--ink-2)}
.sp .n{text-align:right;font-weight:700;font-size:1.3em;font-variant-numeric:tabular-nums}
.sp .kt{text-align:right;color:#666;font-size:.85em;font-variant-numeric:tabular-nums}
@media (max-width:560px){.k{white-space:normal;min-width:0;flex:0 1 auto}.v{flex:0 1 auto;min-width:0}.d{min-width:8px;flex:1 1 8px}.box{margin-right:10px}.body{padding:6px 10px 12px}}
@media (prefers-reduced-motion:reduce){.prog i{transition:none}}
.err{border:3px solid var(--red);border-radius:12px;background:var(--red-wash);padding:14px;margin-top:20px}
/* ---- Fit-to-screen mode for checklist pages ---- */
html,body{height:100%;overscroll-behavior:none}
button,a{touch-action:manipulation}
.wrap.fit{height:100dvh;height:100svh;display:flex;flex-direction:column;overflow:hidden;
  padding-block:calc(8px + env(safe-area-inset-top,0px)) 0}
.wrap.fit .top{flex:none;margin-bottom:8px}
.wrap.fit .tabs{flex:none;margin-bottom:8px}
.wrap.fit .card{flex:1 1 auto;min-height:0;display:flex;flex-direction:column}
.wrap.fit .band{flex:none;padding:10px 16px}
.wrap.fit .body{flex:1 1 auto;min-height:0;overflow:auto;font-size:var(--fs,21px);padding:2px 14px 6px}
.wrap.fit .it{font-size:1em;padding:.22em 0}
.wrap.fit button.it{padding:.26em 4px}
.wrap.fit .box{width:1.3em;height:1.3em;margin-right:.6em}
.wrap.fit .box svg{width:.9em;height:.9em}
.wrap.fit .sub{font-size:.6em;margin:.7em 0 .1em}
.wrap.fit .note,.wrap.fit .warn{font-size:.78em;padding:.4em .6em;margin:.45em 0}
.wrap.fit .sp{font-size:1em}.wrap.fit .sp td{padding:.25em .4em}
.wrap.fit .bar{position:static;flex:none;margin-top:8px;padding:8px 0 calc(6px + env(safe-area-inset-bottom,0px))}
.wrap.fit .foot{flex:none;margin:0 0 4px;font-size:10px;line-height:1.3}
.wrap.fit #miss{position:fixed;z-index:20;left:max(16px,env(safe-area-inset-left,0px));right:max(16px,env(safe-area-inset-right,0px));
  bottom:calc(96px + env(safe-area-inset-bottom,0px));max-height:55svh;overflow:auto}
.wrap.fit #miss .panel{margin:0;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.wrap:not(.fit){min-height:100%;padding-top:calc(14px + env(safe-area-inset-top,0px));padding-bottom:env(safe-area-inset-bottom,0px)}
@media (min-width:700px){.wrap.fit #miss{max-width:600px;margin:0 auto}.tab{height:min(200px,26vh)}}
@media (max-width:699px){.wrap.fit .tab{padding:5px 2px;font-size:11px}.wrap.fit .home{padding:4px 10px 4px 6px;font-size:15px}.wrap.fit .home img{height:24px}.wrap.fit .act{padding:8px 10px;font-size:14px}.wrap.fit .act.next{font-size:16px}}

/* ---- Avionics how-to cards ---- */
.wrap.cards .body{font-size:18px}
.step{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--rule)}
.sn{flex:none;width:34px;height:34px;border-radius:50%;background:#e8a317;border:2.5px solid var(--ink);display:grid;place-items:center;font-weight:700;font-size:18px}
.sb{flex:1;min-width:0}
.st{line-height:1.45}
.step figure{margin:10px 0 0}
.step img{width:100%;max-width:520px;height:auto;display:block;border-radius:10px;border:2px solid var(--ink);background:#2b2f36}
.step figcaption{font-size:12px;color:var(--ink-2);margin-top:4px}
.wrap.cards .it .v{white-space:normal}
@media (min-width:700px){.tab{height:min(150px,19vh)}.tab span{font-size:14px}}
@media (max-width:699px){.tab{font-size:10px;letter-spacing:.06em;padding:7px 2px}}

@keyframes skyflash{0%,100%{background:var(--amb-wash)}50%{background:#ffd27a}}
button.it.missed.flash{animation:skyflash .45s ease-in-out 3}
@media (prefers-reduced-motion:reduce){button.it.missed.flash{animation:none}}
@media (max-width:560px){.wrap.fit .body{padding-left:8px;padding-right:10px}.wrap.fit button.it{padding-left:2px;padding-right:2px}.wrap.fit .d{min-width:4px;margin:0 6px}.wrap.fit .box{margin-right:.45em}}