/* Highway-sign design language: interstate-green guide panels, school-bus yellow actions, asphalt neutrals.
   Overpass is based on the Highway Gothic face used on U.S. road signs; Vazirmatn covers Farsi. */
:root{
 --asphalt:#1b2127; --road:#f3f5f2; --panel:#ffffff; --line:#cfd6ce; --muted:#4d5862;
 --guide:#0b6e4f; --guide-2:#08583f; --guide-ink:#ffffff; --bus:#f4b400; --bus-ink:#1b2127; --bus-edge:#a87b00;
 --stop:#b71c1c; --ok:#17692f; --sky:#e3f2ec; --focus:#1565c0;
 --font-display:"Overpass","Vazirmatn","Arial Narrow",Arial,sans-serif;
 --font-body:"Source Sans 3","Vazirmatn","Segoe UI",Roboto,Arial,sans-serif;
 --r:12px; color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
 --asphalt:#e9edea; --road:#12171b; --panel:#1a2126; --line:#33404a; --muted:#a8b3ba;
 --guide:#1f9a72; --guide-2:#15795a; --guide-ink:#fff; --bus:#f6c533; --bus-ink:#12171b; --bus-edge:#8a6a00; --stop:#ff6b6b; --ok:#5cc47e; --sky:#173029; --focus:#90caf9; color-scheme:dark;}}
:root[data-theme="dark"]{
 --asphalt:#e9edea; --road:#12171b; --panel:#1a2126; --line:#33404a; --muted:#a8b3ba;
 --guide:#1f9a72; --guide-2:#15795a; --guide-ink:#fff; --bus:#f6c533; --bus-ink:#12171b; --bus-edge:#8a6a00; --stop:#ff6b6b; --ok:#5cc47e; --sky:#173029; --focus:#90caf9; color-scheme:dark;}
*{box-sizing:border-box}
html,body{margin:0}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{background:var(--road);color:var(--asphalt);font-family:var(--font-body);font-size:17px;line-height:1.55}
body.plain{padding:40px 0}
a{color:var(--guide)}
h1,h2,h3{font-family:var(--font-display);line-height:1.18;text-wrap:balance;margin:0}
h2{font-size:clamp(1.55rem,3vw,2.05rem);font-weight:900}
h3{font-size:1.1rem;font-weight:800}
button,select,input{font:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1140px;margin:0 auto;padding:0 18px}
.narrow{max-width:560px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;inset-inline-start:8px;top:-60px;z-index:100;background:var(--bus);color:var(--bus-ink);padding:10px 14px;border-radius:8px;font-weight:800}
.skip:focus{top:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;padding:12px 20px;font-weight:800;cursor:pointer;text-decoration:none;min-height:44px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-bus{background:var(--bus);color:var(--bus-ink);box-shadow:0 3px 0 var(--bus-edge)}
.btn-guide{background:var(--guide);color:var(--guide-ink);box-shadow:0 3px 0 var(--guide-2)}
.btn-ghost{background:transparent;color:inherit;border:2px solid currentColor}
.btn-sm{padding:8px 13px;font-size:.93rem;min-height:40px}
.tag{font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
[dir="rtl"] .tag{letter-spacing:0;text-transform:none}
.note{font-size:.92rem;color:var(--muted)}
.callout{border-inline-start:5px solid var(--bus);background:var(--panel);padding:12px 14px;border-radius:8px;font-size:.95rem}
bdi.src{font-family:var(--font-body)}

/* Header */
.top{position:sticky;top:0;z-index:20;background:var(--guide);color:var(--guide-ink);box-shadow:0 2px 0 rgba(0,0,0,.15)}
.top .wrap{display:flex;align-items:center;gap:10px;padding-top:9px;padding-bottom:9px}
.brand{font-family:"Overpass",Arial,sans-serif;font-weight:900;font-size:1.2rem;display:flex;align-items:center;gap:8px;color:var(--guide-ink);text-decoration:none;white-space:nowrap}
.brand svg{width:30px;height:30px;flex:none}
.nav{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;margin-inline-start:auto;-webkit-overflow-scrolling:touch}
.nav::-webkit-scrollbar{display:none}
.nav a{color:var(--guide-ink);text-decoration:none;padding:8px 9px;border-radius:6px;font-weight:700;font-size:.92rem;white-space:nowrap}
.nav a:hover{background:rgba(255,255,255,.16)}
.langsel{background:var(--guide-2);color:var(--guide-ink);border:2px solid rgba(255,255,255,.7);border-radius:8px;padding:6px 8px;font-weight:800;min-height:40px}
.acct-btn{background:transparent;color:var(--guide-ink);border:2px solid rgba(255,255,255,.7);border-radius:8px;padding:6px 10px;font-weight:800;cursor:pointer;min-height:40px;white-space:nowrap}
.menu-btn{display:none;background:transparent;border:2px solid rgba(255,255,255,.7);color:var(--guide-ink);border-radius:8px;min-height:40px;min-width:44px;font-size:1.2rem;cursor:pointer}
@media (max-width:960px){
 .menu-btn{display:block;margin-inline-start:auto}
 .nav{display:none;position:absolute;top:100%;inset-inline:0;background:var(--guide-2);flex-direction:column;padding:8px 18px 14px;margin:0}
 .nav.open{display:flex}
 .nav a{padding:12px 8px;font-size:1rem}
}

/* Hero */
.hero{background:linear-gradient(180deg,var(--sky),var(--road));padding:34px 0 10px}
.hero .grid{display:grid;grid-template-columns:1.15fr 1fr;gap:30px;align-items:center}
.kicker{display:inline-block;background:var(--guide);color:var(--guide-ink);border-radius:6px;padding:4px 10px;font-weight:800;font-size:.85rem;font-family:var(--font-display)}
.hero h1{font-size:clamp(1.85rem,4.2vw,2.9rem);font-weight:900;margin:12px 0}
.hero p{color:var(--muted);max-width:60ch;font-size:1.06rem}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;align-items:end}
.statepick{display:grid;gap:4px}
.statepick label{font-weight:800;font-size:.9rem}
select.field,input.field{padding:10px 12px;border-radius:10px;border:2px solid var(--line);background:var(--panel);color:var(--asphalt);min-height:44px}
.stats{display:flex;gap:22px;margin-top:20px;flex-wrap:wrap}
.stats b{display:block;font-family:var(--font-display);font-size:1.9rem;font-weight:900;color:var(--guide);font-variant-numeric:tabular-nums}
.stats span{color:var(--muted);font-size:.9rem}
.heroart svg{width:100%;height:auto;display:block;border-radius:16px}
.road-anim .car{animation:drive 7s linear infinite}
.road-anim .truck{animation:drive 11s linear infinite;animation-delay:-4s}
.road-anim .dash{animation:dash 1s linear infinite}
@keyframes drive{from{transform:translateX(-170px)}to{transform:translateX(640px)}}
@keyframes dash{from{stroke-dashoffset:0}to{stroke-dashoffset:-40}}
.indep{margin:14px 0 0;max-width:72ch}

section{padding:40px 0;border-top:1px solid var(--line)}
.lede{color:var(--muted);max-width:70ch;margin:8px 0 18px}

/* State */
.statehead{display:flex;gap:14px;align-items:center;flex-wrap:wrap;justify-content:space-between;background:var(--guide);color:var(--guide-ink);border-radius:var(--r);padding:18px 20px;border:3px solid var(--guide-ink);box-shadow:0 0 0 3px var(--guide)}
.statehead h2{font-size:1.6rem}
.laws{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin-top:14px}
.law{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px;border-inline-start:5px solid var(--guide)}
.law .v{font-family:var(--font-display);font-weight:800;font-size:1.12rem;margin-top:3px}
.law .d{font-size:.88rem;color:var(--muted);margin-top:4px}
.srcs{margin-top:14px;display:grid;gap:4px}

/* Cards */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}
details.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r)}
details.card summary{list-style:none;cursor:pointer;padding:15px;display:flex;gap:12px;align-items:center;min-height:44px}
details.card summary::-webkit-details-marker{display:none}
details.card summary .ic{flex:0 0 42px;height:42px}
details.card summary .ic svg{width:42px;height:42px}
details.card summary::after{content:"+";margin-inline-start:auto;font-weight:900;font-size:1.3rem;color:var(--guide)}
details.card[open] summary::after{content:"−"}
details.card ul{margin:0;padding-block:0 16px;padding-inline:36px 16px}
details.card li{margin:6px 0}

/* Videos */
.videogrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.vcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.vcard video{display:block;width:100%;aspect-ratio:16/9;background:#2c3238}
.vcard .meta{padding:10px 14px;display:flex;justify-content:space-between;align-items:center;gap:10px}

/* Practice */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.chip{background:var(--panel);border:2px solid var(--line);border-radius:999px;padding:7px 13px;cursor:pointer;font-weight:700;font-size:.9rem;color:var(--asphalt);min-height:40px}
.chip[aria-pressed="true"]{background:var(--guide);border-color:var(--guide);color:var(--guide-ink)}
.quiz{display:grid;grid-template-columns:1fr 290px;gap:18px;align-items:start}
.qbox{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px;min-height:300px}
.qmeta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-weight:700;font-size:.92rem;font-variant-numeric:tabular-nums;flex-wrap:wrap}
.progress{height:8px;background:var(--line);border-radius:8px;margin:10px 0 14px;overflow:hidden}
.progress span{display:block;height:100%;background:var(--guide)}
.qsign{display:flex;justify-content:center;margin:2px 0 12px}
.qsign svg{width:118px;height:118px}
.qpic{margin:0 0 12px}
.qpic svg.scene{width:100%;height:auto;border-radius:10px;display:block}
.qtext{font-weight:800;font-size:1.15rem;margin-bottom:12px}
.opts{display:grid;gap:9px}
.opt{text-align:start;background:var(--road);color:var(--asphalt);border:2px solid var(--line);border-radius:10px;padding:11px 13px;cursor:pointer;display:flex;gap:10px;align-items:center;min-height:48px}
.opt b{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--panel);border:2px solid var(--line);flex:none;font-family:"Overpass",Arial,sans-serif}
.opt:hover:not(:disabled){border-color:var(--guide)}
.opt[aria-pressed="true"]{border-color:var(--guide);background:var(--sky)}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,var(--panel))}
.opt.wrong{border-color:var(--stop);background:color-mix(in srgb,var(--stop) 12%,var(--panel))}
.opt.right b{background:var(--ok);color:#fff;border-color:var(--ok)}
.opt.wrong b{background:var(--stop);color:#fff;border-color:var(--stop)}
.opt .mark{margin-inline-start:auto;font-weight:900}
.explain{margin-top:12px;padding:12px 14px;border-inline-start:5px solid var(--guide);background:var(--road);border-radius:6px}
.qnav{display:flex;justify-content:space-between;gap:10px;margin-top:14px;flex-wrap:wrap}
.side{display:grid;gap:12px}
.box{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.big{font-family:var(--font-display);font-weight:900;font-size:2.2rem;font-variant-numeric:tabular-nums;line-height:1.1}
.lvlbar{height:10px;background:var(--line);border-radius:10px;overflow:hidden;margin-top:6px}
.lvlbar span{display:block;height:100%;background:var(--bus)}
.badgelist{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.bdg{font-size:.82rem;font-weight:700;border-radius:999px;padding:4px 10px;border:2px dashed var(--line);color:var(--muted)}
.bdg.on{border-style:solid;border-color:var(--bus);color:var(--asphalt);background:color-mix(in srgb,var(--bus) 22%,var(--panel))}
.panel-msg{border-radius:var(--r);padding:24px;text-align:center;display:grid;gap:10px;justify-items:center}
.panel-msg.lock{background:var(--bus);color:var(--bus-ink)}
.panel-msg.info{background:var(--sky)}
.panel-msg.pass{background:var(--ok);color:#fff}
.timer{font-family:var(--font-display);font-weight:900;color:var(--stop)}
.review-list{display:grid;gap:8px;text-align:start;width:100%}
.review-list div{background:var(--panel);color:var(--asphalt);border-radius:8px;padding:10px;border-inline-start:5px solid var(--stop)}
.review-list div.ok{border-inline-start-color:var(--ok)}

/* Game */
.game{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center;background:#1d2329;color:#f3f5f2;border-radius:var(--r);padding:22px}
.game .tag{color:#c9d2d8}
.gsign{display:grid;place-items:center;min-height:190px}
.gsign svg{width:165px;height:165px}
.gopts{display:grid;gap:8px}
.gopts button{background:rgba(255,255,255,.08);color:inherit;border:2px solid rgba(255,255,255,.3);border-radius:10px;padding:11px;text-align:start;cursor:pointer;font-weight:700;min-height:48px}
.gopts button:hover{border-color:#f4b400}
.gstats{display:flex;gap:22px;font-family:var(--font-display);font-weight:800;font-variant-numeric:tabular-nums;margin-bottom:10px}
.gstats b{color:#f4b400;font-size:1.5rem}
.flash-ok{animation:fok .35s}.flash-no{animation:fno .35s}
@keyframes fok{50%{background:#17692f}}@keyframes fno{50%{background:#b71c1c}}

/* Trucks */
.truckhead{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;align-items:center;margin-bottom:16px}
.truckhead svg{width:100%;height:auto;border-radius:14px}

/* Maps */
.maprow{display:flex;gap:10px;flex-wrap:wrap;align-items:end;margin-bottom:12px}
.maprow label{display:grid;gap:4px;font-weight:800}
.mapframe{width:100%;height:440px;border:0;border-radius:var(--r);background:var(--panel)}

/* Pricing */
.pricing{display:grid;grid-template-columns:1fr 1.15fr;gap:16px;margin-top:16px}
.plan{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px;display:grid;gap:12px;align-content:start}
.plan.pass{border:4px solid var(--bus)}
.plan .amt{font-family:var(--font-display);font-weight:900;font-size:2.8rem;line-height:1}
.plan .amt small{font-size:1rem;color:var(--muted);font-weight:700}
.plan ul{margin:0;padding:0;list-style:none;display:grid;gap:7px}
.plan li::before{content:"✓";color:var(--ok);font-weight:900;margin-inline-end:8px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.95rem}
.check input{width:22px;height:22px;margin-top:2px;flex:none}

/* Account */
.acct{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.status{font-weight:800}

footer{padding:26px 0 44px;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}
footer .wrap{display:grid;gap:10px}
dialog{border:0;border-radius:var(--r);padding:0;max-width:460px;width:calc(100% - 32px);background:var(--panel);color:var(--asphalt)}
dialog::backdrop{background:rgba(0,0,0,.55)}
dialog .inner{padding:22px;display:grid;gap:12px}
.toast{position:fixed;inset-inline-end:16px;bottom:16px;z-index:50;background:#1d2329;color:#f3f5f2;padding:12px 16px;border-radius:10px;font-weight:700;box-shadow:0 8px 24px rgba(0,0,0,.3);transform:translateY(160%);transition:transform .3s}
.toast.show{transform:none}

@media (max-width:860px){
 .hero .grid,.quiz,.game,.pricing,.truckhead,.acct{grid-template-columns:1fr}
 .mapframe{height:340px}
 body{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
 *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
@media (max-width:520px){
 .top .wrap{gap:6px;padding-inline:10px}
 .brand{font-size:1rem;gap:6px;min-width:0}
 .brand span{overflow:hidden;text-overflow:ellipsis}
 .brand svg{width:26px;height:26px}
 .acct-btn{padding:6px 8px;font-size:.85rem;max-width:96px;overflow:hidden;text-overflow:ellipsis}
 .langsel{padding-inline:4px}
}
@media (max-width:380px){.brand span{display:none}}

.u-row{display:flex;justify-content:space-between;font-weight:800}.u-inherit{color:inherit}.u-mt8{margin-top:8px}.u-mt10{margin-top:10px}.u-mt12{margin-top:12px}.u-mt14{margin-top:14px}.u-m0{margin:0}.u-m10t{margin:10px 0 0}.u-m6{margin:6px 0 10px}.u-w150{width:150px}.u-b{font-weight:800}.u-flexrow{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}.u-grow{flex:1;min-width:220px}
.toast:not(.show){visibility:hidden;transition:transform .3s,visibility 0s .3s}
/* v4 additions */
.explain.ok{border-inline-start-color:#2e7d32}.explain.no{border-inline-start-color:#c62828}
.mini{margin:6px 0 0;padding-inline-start:18px;font-size:.92rem}.mini li{margin:3px 0}
.linkbtn{background:none;border:0;padding:0;color:var(--guide);font:inherit;font-weight:700;text-decoration:underline;cursor:pointer;min-height:0}
.pill{display:inline-block;font-size:.75rem;font-weight:800;padding:1px 8px;border-radius:20px;background:var(--line)}.pill.ok{background:#2e7d32;color:#fff}
.lvlbar.ready span{background:var(--guide)}
.btn-danger{background:#b3261e;color:#fff;box-shadow:0 3px 0 #7a1712}
details.danger summary{cursor:pointer;font-weight:700;color:#b3261e}
.stpractice{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.callout.warn{border-inline-start-color:#c62828}
.legal h2{margin-top:1.4em;font-size:1.15rem}.legal p,.legal li{line-height:1.6}
.vcard details{margin-top:6px}.vcard summary{cursor:pointer;font-weight:700}
.review-list s{color:#c62828}
.vcard .meta{display:block}.vcard .meta h3{margin:0 0 4px}
/* American hero */
.hero{position:relative;overflow:hidden;isolation:isolate}
.heroflag{position:absolute;z-index:-1;inset-block-start:-6%;inset-inline-end:-8%;width:min(900px,75%);aspect-ratio:19/10;background:url(/us-flag.svg) center/100% 100% no-repeat;opacity:.16;transform:rotate(-4deg) skewX(-6deg);
 -webkit-mask-image:radial-gradient(ellipse at 60% 40%,#000 35%,transparent 75%);mask-image:radial-gradient(ellipse at 60% 40%,#000 35%,transparent 75%)}
[dir="rtl"] .heroflag{transform:rotate(4deg) skewX(6deg)}
.wave{transform-origin:5px 34px;animation:wave 3.2s ease-in-out infinite}
@keyframes wave{0%,100%{transform:skewY(0) scaleX(1)}50%{transform:skewY(-3deg) scaleX(.97)}}
@media (prefers-reduced-motion:reduce){.wave{animation:none}}
.division{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:6px 0}.division img{background:#fff;border-radius:6px;padding:4px 6px;height:auto}
@media (max-width:520px){.heroflag{width:120%;inset-inline-end:-30%;opacity:.12}}
@media (max-width:430px){.brand span{display:none}.acct-btn{max-width:none}}