/* =========================================================================
   Cyber Map Academy — design system v7
   Brand: violet → blue → cyan gradient on deep "ink". Amber marks achievement.
   ========================================================================= */
:root{
  /* brand */
  --v:#7C5CFF; --b:#3B82F6; --c:#00D4FF; --amber:#FFB020;
  --brand:linear-gradient(120deg,var(--v),var(--b) 55%,var(--c));
  --brand-soft:linear-gradient(120deg,color-mix(in srgb,var(--v) 14%,transparent),color-mix(in srgb,var(--c) 14%,transparent));
  /* legacy aliases kept so older markup keeps its colours */
  --navy:#132043; --blue:var(--b); --cyan:var(--c);
  /* light surface scale */
  --bg:#F6F8FD; --surface:#FFFFFF; --surface2:#EEF2FA; --surface3:#E4EBF7;
  --text:#0B1221; --muted:#5B6B86; --line:#E2E8F4; --line-strong:#CBD6EA;
  --ok:#12A150; --warn:#D97706; --bad:#E0344A;
  --ring:color-mix(in srgb,var(--b) 45%,transparent);
  /* elevation */
  --sh-1:0 1px 2px rgba(11,18,33,.05);
  --sh-2:0 1px 2px rgba(11,18,33,.05),0 10px 26px -12px rgba(11,18,33,.22);
  --sh-3:0 20px 50px -18px rgba(11,18,33,.34);
  --glow:0 0 0 1px color-mix(in srgb,var(--b) 26%,transparent),0 14px 40px -16px color-mix(in srgb,var(--v) 60%,transparent);
  /* shape + rhythm */
  --r-s:10px; --r-m:14px; --r-l:20px; --r-xl:28px; --radius:var(--r-m);
  --bar-h:66px; --tab-h:0px;
  /* type */
  --font:'Sora','IBM Plex Sans Arabic',system-ui,-apple-system,'Segoe UI',Tahoma,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;
  /* motion */
  --ease:cubic-bezier(.22,1,.36,1); --ease-out:cubic-bezier(.33,1,.68,1);
  --t-fast:.14s; --t:.24s; --t-slow:.45s;
}
:root[data-theme=dark]{
  --bg:#070B17; --surface:#0E1526; --surface2:#17203A; --surface3:#1F2B4A;
  --text:#E8EEFA; --muted:#94A3BE; --line:#1E2A45; --line-strong:#2B3A5E;
  --navy:#0B1224;
  --ok:#2ECC71; --warn:#F0A020; --bad:#FF5C72;
  --sh-1:0 1px 2px rgba(0,0,0,.5);
  --sh-2:0 1px 2px rgba(0,0,0,.5),0 12px 30px -14px rgba(0,0,0,.8);
  --sh-3:0 24px 60px -20px rgba(0,0,0,.85);
}
:root[lang=ar]{--font:'IBM Plex Sans Arabic','Sora',system-ui,-apple-system,'Segoe UI',Tahoma,sans-serif}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
/* ambient brand wash behind everything */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(60vw 42vw at 78% -8%,color-mix(in srgb,var(--v) 15%,transparent),transparent 62%),
             radial-gradient(52vw 38vw at 4% 2%,color-mix(in srgb,var(--c) 13%,transparent),transparent 60%)}
a{color:var(--b);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;letter-spacing:-.022em;font-weight:700}
h1{font-size:clamp(1.6rem,4.2vw,2.6rem)}h2{font-size:clamp(1.2rem,2.8vw,1.5rem)}h3{font-size:1.1rem}h4{font-size:.95rem}
p{margin:0 0 1em}
.muted{color:var(--muted)}.small{font-size:.86rem}.tiny{font-size:.76rem}
.mono{font-family:var(--mono);font-variant-ligatures:none}
.grow{flex:1;min-width:0}.center{text-align:center}
.ltr{direction:ltr;unicode-bidi:isolate;text-align:left}
.grad{background:var(--brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.wrap{max-width:1180px;margin-inline:auto;padding-inline:max(16px,env(safe-area-inset-left),env(safe-area-inset-right))}
.skip{position:absolute;inset-inline-start:-999px}
.skip:focus{inset-inline-start:10px;top:10px;background:var(--surface);padding:10px 14px;z-index:99;border-radius:var(--r-s);box-shadow:var(--sh-2)}
:focus-visible{outline:2px solid var(--c);outline-offset:3px;border-radius:8px}
::selection{background:color-mix(in srgb,var(--v) 30%,transparent)}
.hidden,[hidden]{display:none!important}
hr{border:0;border-top:1px solid var(--line);margin:18px 0}

/* ---------------------------------------------------------------- chrome */
.banner{background:var(--brand);color:#fff;text-align:center;padding:9px 16px;font-weight:600;font-size:.88rem;letter-spacing:.01em}
.nav{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--surface) 78%,transparent);backdrop-filter:blur(16px) saturate(1.6);
  border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent);padding-top:env(safe-area-inset-top)}
.nav .wrap{display:flex;align-items:center;gap:14px;height:var(--bar-h)}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;color:var(--text);white-space:nowrap;letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand img{width:36px;height:36px;filter:drop-shadow(0 4px 12px color-mix(in srgb,var(--v) 45%,transparent));transition:transform var(--t) var(--ease)}
.brand:hover img{transform:rotate(-8deg) scale(1.06)}
.brand small{display:block;font-weight:600;color:var(--muted);font-size:.6rem;letter-spacing:.22em;text-transform:uppercase;line-height:1.3}
.links{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none;min-width:0}
.links::-webkit-scrollbar{display:none}
.links a{position:relative;color:var(--muted);padding:9px 13px;border-radius:var(--r-s);font-weight:600;font-size:.89rem;white-space:nowrap;transition:color var(--t-fast),background var(--t-fast)}
.links a::after{content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;background:var(--brand);transform:scaleX(0);transition:transform var(--t) var(--ease)}
.links a:hover{color:var(--text);text-decoration:none}
.links a.on{color:var(--text)}.links a.on::after{transform:scaleX(1)}
.right{display:flex;gap:8px;align-items:center;margin-inline-start:auto}.links+.right{margin-inline-start:0}
.xp{font-weight:700;font-size:.78rem;background:linear-gradient(120deg,color-mix(in srgb,var(--amber) 22%,transparent),color-mix(in srgb,var(--amber) 8%,transparent));
  border:1px solid color-mix(in srgb,var(--amber) 35%,transparent);padding:6px 12px;border-radius:99px;white-space:nowrap}
.tabbar{display:none}
.show-m{display:none!important}
footer{border-top:1px solid var(--line);margin-top:48px;padding:28px 0 calc(28px + var(--tab-h));color:var(--muted);font-size:.84rem}

/* ---------------------------------------------------------------- buttons */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;
  background:var(--brand);color:#fff;font:650 .92rem var(--font);padding:11px 20px;border-radius:12px;cursor:pointer;
  min-height:44px;text-align:center;overflow:hidden;isolation:isolate;
  box-shadow:0 1px 2px rgba(11,18,33,.1),0 8px 20px -10px color-mix(in srgb,var(--v) 75%,transparent);
  transition:transform var(--t-fast) var(--ease),box-shadow var(--t) var(--ease),filter var(--t-fast)}
.btn::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(120deg,var(--c),var(--v));opacity:0;transition:opacity var(--t)}
.btn:hover{text-decoration:none;transform:translateY(-1px);box-shadow:0 2px 4px rgba(11,18,33,.1),0 14px 30px -12px color-mix(in srgb,var(--v) 85%,transparent)}
.btn:hover::before{opacity:1}
.btn:active{transform:translateY(0) scale(.985)}
.btn.ghost{background:var(--surface);color:var(--text);border-color:var(--line-strong);box-shadow:var(--sh-1)}
.btn.ghost::before{background:var(--surface2)}
.btn.ghost:hover{box-shadow:var(--sh-2)}
.btn.danger{background:linear-gradient(120deg,#E0344A,#FF6B4A);box-shadow:0 8px 20px -10px rgba(224,52,74,.8)}
.btn.danger::before{background:linear-gradient(120deg,#FF6B4A,#E0344A)}
.btn.navy{background:var(--navy);box-shadow:var(--sh-2)}.btn.navy::before{background:#1b2d5e}
.btn.sm{padding:7px 14px;font-size:.82rem;min-height:36px;border-radius:10px}
.btn.lg{padding:14px 26px;font-size:1rem;min-height:52px;border-radius:14px}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none}
.btn[disabled]:hover::before{opacity:0}
/* click ripple */
.btn .rip{position:absolute;border-radius:50%;background:rgba(255,255,255,.45);transform:translate(-50%,-50%) scale(0);animation:rip .55s var(--ease-out) forwards;pointer-events:none;z-index:1}
@keyframes rip{to{transform:translate(-50%,-50%) scale(1);opacity:0}}
.icon-btn{display:inline-grid;place-items:center;background:var(--surface);border:1px solid var(--line);color:var(--text);min-width:40px;height:40px;
  border-radius:11px;cursor:pointer;font:650 .78rem var(--font);transition:transform var(--t-fast) var(--ease),border-color var(--t-fast),background var(--t-fast)}
.icon-btn:hover{border-color:var(--line-strong);background:var(--surface2);transform:translateY(-1px)}
.icon-btn:active{transform:scale(.94)}

/* ---------------------------------------------------------------- inputs */
input[type=text],input[type=email],input[type=password],input[type=number],input[type=search],input[type=url],textarea,select{
  width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:11px;background:var(--surface);color:var(--text);
  font:inherit;font-size:16px;min-height:46px;transition:border-color var(--t-fast),box-shadow var(--t-fast)}
input:hover,textarea:hover,select:hover{border-color:color-mix(in srgb,var(--b) 40%,var(--line-strong))}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--b);box-shadow:0 0 0 4px var(--ring)}
textarea{font-family:var(--mono);font-size:13px;min-height:130px;direction:ltr;text-align:left;line-height:1.65;resize:vertical}
label{display:block;font-weight:650;font-size:.84rem;margin:14px 0 6px;letter-spacing:.005em}
select{appearance:none;padding-inline-end:36px;
  background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);
  background-position:calc(100% - 18px) 21px,calc(100% - 13px) 21px;background-size:5px 5px;background-repeat:no-repeat}
:root[dir=rtl] select{background-position:18px 21px,13px 21px;
  background-image:linear-gradient(135deg,transparent 50%,currentColor 50%),linear-gradient(45deg,currentColor 50%,transparent 50%)}

/* ---------------------------------------------------------------- layout */
main{padding:30px 0 calc(40px + var(--tab-h));min-height:68vh}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fill,minmax(min(320px,100%),1fr))}
.g3{grid-template-columns:repeat(auto-fill,minmax(min(250px,100%),1fr))}
.g4{grid-template-columns:repeat(auto-fill,minmax(min(190px,100%),1fr))}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.between{justify-content:space-between}.stack>*+*{margin-top:12px}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:22px;box-shadow:var(--sh-2);min-width:0}
a.card{display:block;color:inherit;transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease),border-color var(--t)}
a.card:hover{text-decoration:none;transform:translateY(-3px);box-shadow:var(--sh-3);border-color:color-mix(in srgb,var(--b) 45%,var(--line))}
/* gradient hairline that lights up on hover */
a.card::after{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:var(--brand);opacity:0;
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;
  transition:opacity var(--t);pointer-events:none}
a.card:hover::after{opacity:.85}
.pad-0{padding:0}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}.crumbs a:hover{color:var(--b)}

/* ---------------------------------------------------------------- tags */
.tag{display:inline-flex;align-items:center;gap:5px;font-size:.7rem;font-weight:700;letter-spacing:.05em;padding:4px 10px;border-radius:99px;
  background:var(--surface2);color:var(--muted);border:1px solid transparent;white-space:nowrap}
.tag.Beginner{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok);border-color:color-mix(in srgb,var(--ok) 28%,transparent)}
.tag.Intermediate{background:color-mix(in srgb,var(--b) 14%,transparent);color:var(--b);border-color:color-mix(in srgb,var(--b) 28%,transparent)}
.tag.Advanced{background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad);border-color:color-mix(in srgb,var(--bad) 28%,transparent)}
.tag.real{background:color-mix(in srgb,var(--amber) 16%,transparent);color:#A86A00;border-color:color-mix(in srgb,var(--amber) 34%,transparent)}
:root[data-theme=dark] .tag.real{color:var(--amber)}
.tag.brand{background:var(--brand-soft);color:var(--b);border-color:color-mix(in srgb,var(--b) 30%,transparent)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:700 .7rem/1 var(--font);letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand)}

/* ---------------------------------------------------------------- bars */
.bar{height:8px;background:var(--surface2);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;width:0;background:var(--brand);border-radius:99px;transition:width .8s var(--ease)}
.meter{height:10px;border-radius:99px;background:var(--surface2);overflow:hidden}
.meter i{display:block;height:100%;width:0;transition:width var(--t-slow) var(--ease),background var(--t)}

/* ---------------------------------------------------------------- hero */
.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;padding:28px 0 46px}
.hero h1{font-size:clamp(2rem,5.2vw,3.5rem);letter-spacing:-.035em;line-height:1.08}
.hero h1 em{font-style:normal;background:var(--brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:1.1rem;color:var(--muted);max-width:54ch}
.hero svg{width:100%;height:auto;max-height:340px;overflow:visible}
.heroart .ring1{fill:none;stroke:var(--line-strong);stroke-width:1.2;opacity:.65}
.heroart .link{stroke:var(--line-strong);stroke-width:2;fill:none}
.heroart .route{fill:none;stroke:url(#hg);stroke-width:4;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:520;stroke-dashoffset:520;animation:draw 2.2s var(--ease) .25s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.heroart .dot{fill:var(--surface);stroke:var(--line-strong);stroke-width:2.5}
.heroart .dot.on{fill:var(--b);stroke:var(--surface);animation:popin .5s var(--ease) both}
.heroart .goal{fill:var(--v);stroke:var(--surface);stroke-width:3;animation:popin .5s var(--ease) 1.9s both}
.heroart .pulse{fill:none;stroke:var(--v);stroke-width:2;opacity:0;animation:pulse 2.6s ease-out 2.2s infinite}
@keyframes popin{from{opacity:0;transform:scale(.4);transform-origin:center;transform-box:fill-box}to{opacity:1}}
@keyframes pulse{0%{r:16;opacity:.55}100%{r:42;opacity:0}}
.heroart .lbl{fill:var(--muted);font:600 11px var(--font);text-anchor:middle}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin:24px 0}
.stat{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:16px 18px;min-width:0;overflow:hidden;box-shadow:var(--sh-1)}
.stat::before{content:"";position:absolute;inset-inline-start:0;top:0;bottom:0;width:3px;background:var(--brand);opacity:.75}
.stat b{display:block;font-size:1.7rem;line-height:1.15;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:.78rem;font-weight:500}

/* ---------------------------------------------------------------- lesson */
.lesson{max-width:780px}.lesson p{font-size:1.03rem}
.points{background:var(--brand-soft);border-inline-start:4px solid var(--b);border-radius:var(--r-m);padding:16px 20px;margin:22px 0}
.points h3{font-size:.72rem;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin-bottom:8px}
.points ul{margin:0;padding-inline-start:20px}.points li+li{margin-top:5px}
.q{border:1px solid var(--line);border-radius:var(--r-m);padding:18px;margin:14px 0;background:var(--surface);box-shadow:var(--sh-1)}
.q p{font-weight:650}
.opt{display:flex;gap:11px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:11px;margin:8px 0;cursor:pointer;
  font-weight:500;font-size:.95rem;transition:border-color var(--t-fast),background var(--t-fast),transform var(--t-fast)}
.opt:hover{background:var(--surface2);border-color:var(--line-strong)}
.opt:active{transform:scale(.995)}
.opt input{margin-top:6px;accent-color:var(--b)}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 11%,transparent);animation:pop .35s var(--ease)}
.opt.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 10%,transparent);animation:shake .4s var(--ease)}
@keyframes pop{0%{transform:scale(1)}45%{transform:scale(1.015)}100%{transform:scale(1)}}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-5px)}40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(3px)}}
.expl{font-size:.88rem;color:var(--muted);margin-top:10px}
.navrow{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap}
.navrow .btn{flex:1 1 220px;justify-content:flex-start}
:root[dir=rtl] .flip{display:inline-block;transform:scaleX(-1)}
.mod{margin-top:22px}
.lessons a{display:flex;gap:12px;align-items:center;padding:13px 15px;border:1px solid var(--line);border-radius:12px;margin-top:8px;color:var(--text);
  background:var(--surface);transition:border-color var(--t-fast),transform var(--t-fast) var(--ease),box-shadow var(--t-fast)}
.lessons a:hover{border-color:color-mix(in srgb,var(--b) 50%,var(--line));text-decoration:none;transform:translateX(3px);box-shadow:var(--sh-1)}
:root[dir=rtl] .lessons a:hover{transform:translateX(-3px)}
.chk{width:23px;height:23px;border-radius:50%;border:2px solid var(--line-strong);display:grid;place-items:center;font-size:.72rem;flex:none;transition:var(--t)}
.chk.on{background:var(--ok);border-color:var(--ok);color:#fff}

/* ---------------------------------------------------------------- toast */
.toast{position:fixed;bottom:calc(24px + var(--tab-h) + env(safe-area-inset-bottom));left:50%;background:var(--navy);color:#fff;
  padding:13px 22px;border-radius:14px;box-shadow:var(--sh-3);z-index:80;font-weight:650;max-width:calc(100vw - 32px);text-align:center;
  animation:toastin .4s var(--ease);border:1px solid rgba(255,255,255,.1)}
:root[data-theme=dark] .toast{background:var(--surface2)}
.toast.bad{background:linear-gradient(120deg,#E0344A,#B9152C)}
.toast.good{background:linear-gradient(120deg,#0F9D58,#12A150)}
@keyframes toastin{from{opacity:0;transform:translate(-50%,16px) scale(.96)}to{opacity:1;transform:translate(-50%,0) scale(1)}}
.toast{transform:translateX(-50%)}

/* ---------------------------------------------------------------- data/tasks */
pre.data,.code{background:#060C1B;color:#CFE3FF;border-radius:var(--r-m);padding:16px;overflow:auto;font:13px/1.65 var(--mono);
  border:1px solid #15223F;white-space:pre;direction:ltr;text-align:left;max-width:100%}
.code{font-size:12.5px}
.form{max-width:440px;margin:24px auto}
.err{color:var(--bad);font-size:.87rem;min-height:1.2em;margin-top:8px}
.task{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:start;padding:14px 0;border-bottom:1px solid var(--line)}
.task:last-child{border-bottom:0}
.task .n{width:29px;height:29px;border-radius:50%;background:var(--surface2);display:grid;place-items:center;font-weight:700;font-size:.78rem;transition:var(--t)}
.task.done .n{background:var(--ok);color:#fff;transform:scale(1.05)}
.task .ctl{grid-column:2/4;display:flex;gap:8px;flex-wrap:wrap}.task .ctl input{flex:1;min-width:140px}
.hint{background:color-mix(in srgb,var(--warn) 12%,transparent);border-inline-start:4px solid var(--warn);padding:10px 14px;border-radius:10px;margin:8px 0;font-size:.9rem}

/* ---------------------------------------------------------------- tabs */
.tabs{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 20px}
.tabs button,.tabs a{border:1px solid var(--line);background:var(--surface);color:var(--muted);padding:9px 16px;border-radius:99px;
  font:650 .84rem var(--font);cursor:pointer;min-height:38px;display:inline-flex;align-items:center;gap:7px;
  transition:color var(--t-fast),border-color var(--t-fast),background var(--t-fast),transform var(--t-fast) var(--ease)}
.tabs button:hover,.tabs a:hover{color:var(--text);border-color:var(--line-strong);text-decoration:none;transform:translateY(-1px)}
.tabs button.on,.tabs a.on{background:var(--brand);color:#fff;border-color:transparent;
  box-shadow:0 8px 18px -10px color-mix(in srgb,var(--v) 85%,transparent)}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--r-m)}
table{width:100%;border-collapse:collapse}
th,td{text-align:start;padding:11px 13px;border-bottom:1px solid var(--line);font-size:.89rem;vertical-align:middle}
th{color:var(--muted);font-size:.71rem;text-transform:uppercase;letter-spacing:.08em;white-space:nowrap;font-weight:700}
tbody tr{transition:background var(--t-fast)}
tbody tr:hover{background:var(--surface2)}
tr.me td{background:color-mix(in srgb,var(--b) 10%,transparent)}
tbody tr:last-child td{border-bottom:0}

/* ---------------------------------------------------------------- map */
.mapbox{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);overflow:auto;box-shadow:var(--sh-2);direction:ltr}
.mapbox svg{display:block;min-width:760px;width:100%;height:auto}
.edge{stroke:var(--line-strong);stroke-width:2.5;fill:none;transition:stroke var(--t-slow)}
.edge.on{stroke:var(--c);filter:drop-shadow(0 0 6px color-mix(in srgb,var(--c) 70%,transparent))}
.node circle{fill:var(--surface);stroke:var(--b);stroke-width:3;transition:var(--t) var(--ease)}
.node:hover circle{fill:var(--surface2);stroke:var(--c);r:37}
.node.done circle{fill:var(--ok);stroke:var(--ok)}
.node.part circle{stroke:var(--c);stroke-width:5}
.node text{fill:var(--text);font:650 12px var(--font);text-anchor:middle;pointer-events:none}
.node .num{font-size:15px;font-weight:700}.node.done .num{fill:#fff}
.mapbox a:hover{text-decoration:none}
.legend{display:flex;gap:18px;flex-wrap:wrap;padding:14px 18px;font-size:.82rem;color:var(--muted)}
.heat{display:grid;grid-auto-flow:column;grid-auto-columns:12px;justify-content:start;grid-template-rows:repeat(7,12px);gap:3px;overflow:auto;padding-bottom:6px;direction:ltr}
.heat i{width:12px;height:12px;border-radius:3px;background:var(--surface2);transition:transform var(--t-fast)}
.heat i:hover{transform:scale(1.3)}
.heat i.l1{background:color-mix(in srgb,var(--b) 30%,var(--surface2))}
.heat i.l2{background:color-mix(in srgb,var(--b) 55%,var(--surface2))}
.heat i.l3{background:var(--b)}
.heat i.l4{background:var(--v)}

/* ---------------------------------------------------------------- certificate */
.cert{background:#fff;color:#0B1221;border:1px solid #CBD6EA;padding:48px 34px;text-align:center;max-width:880px;margin:0 auto;border-radius:var(--r-l);
  box-shadow:var(--sh-3);position:relative;overflow:hidden}
.cert::before{content:"";position:absolute;inset:0;border:2px solid transparent;border-radius:inherit;
  background:var(--brand) border-box;-webkit-mask:linear-gradient(#000 0 0) padding-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.cert::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;top:-220px;inset-inline-end:-180px;
  background:radial-gradient(circle,color-mix(in srgb,var(--v) 16%,transparent),transparent 70%)}
.cert>*{position:relative}
.cert img{width:80px}
.cert h1{font-size:clamp(1.5rem,5vw,2.2rem);margin:12px 0}
.cert .name{font-size:clamp(1.3rem,5vw,2rem);font-weight:700;border-bottom:2px solid var(--c);display:inline-block;padding:0 26px 8px;margin:16px 0}
.cert .id{font:13px var(--mono);color:#5B6B86;word-break:break-all;direction:ltr}

/* ---------------------------------------------------------------- tools */
.out{background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font:13px/1.7 var(--mono);
  white-space:pre-wrap;word-break:break-word;min-height:46px;direction:ltr;text-align:left;overflow-x:auto}

.out.pre{white-space:pre;word-break:normal}
.out.err-out{border-color:color-mix(in srgb,var(--bad) 45%,transparent);color:var(--bad)}
.toolgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(250px,100%),1fr));gap:12px}
.toolcard{display:flex;gap:13px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface);
  color:var(--text);transition:transform var(--t) var(--ease),box-shadow var(--t),border-color var(--t)}
.toolcard:hover{text-decoration:none;transform:translateY(-3px);box-shadow:var(--sh-2);border-color:color-mix(in srgb,var(--b) 45%,var(--line))}
.toolcard.on{border-color:var(--b);background:var(--brand-soft)}
.toolcard .ic{flex:none;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--brand-soft);font-size:1.15rem}
.toolcard b{display:block;font-size:.93rem;line-height:1.35}
.toolcard span{font-size:.78rem;color:var(--muted);line-height:1.45;display:block;margin-top:3px}
.copybtn{position:absolute;top:10px;inset-inline-end:10px;z-index:2}
.rel{position:relative}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.88rem}
.kv dt{color:var(--muted);font-weight:600}.kv dd{margin:0;font-family:var(--mono);font-size:.85rem;word-break:break-all;direction:ltr;text-align:start}

/* ---------------------------------------------------------------- admin */
.switch{position:relative;width:46px;height:26px;display:inline-block;flex:none}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:var(--line-strong);border-radius:99px;cursor:pointer;transition:var(--t)}
.switch span:before{content:"";position:absolute;width:20px;height:20px;inset-inline-start:3px;top:3px;background:#fff;border-radius:50%;transition:var(--t) var(--ease);box-shadow:var(--sh-1)}
.switch input:checked+span{background:var(--ok)}
.switch input:checked+span:before{transform:translateX(20px)}
:root[dir=rtl] .switch input:checked+span:before{transform:translateX(-20px)}
.drop{border:2px dashed var(--line-strong);border-radius:var(--r-m);padding:26px;text-align:center;color:var(--muted);transition:var(--t);background:var(--surface2)}
.drop.over{border-color:var(--b);background:var(--brand-soft);transform:scale(1.01)}
.problems{background:color-mix(in srgb,var(--bad) 8%,transparent);border:1px solid color-mix(in srgb,var(--bad) 38%,transparent);border-radius:12px;padding:14px 18px}
.warns{background:color-mix(in srgb,var(--warn) 10%,transparent);border:1px solid color-mix(in srgb,var(--warn) 38%,transparent);border-radius:12px;padding:14px 18px}
.okbox{background:color-mix(in srgb,var(--ok) 10%,transparent);border:1px solid color-mix(in srgb,var(--ok) 38%,transparent);border-radius:12px;padding:14px 18px}
.problems ul,.warns ul{margin:6px 0 0;padding-inline-start:20px;direction:ltr;text-align:left;font:12.5px/1.65 var(--mono)}
.chart{width:100%;height:auto;display:block;direction:ltr;overflow:visible}
.chart rect{fill:var(--b);transition:fill var(--t-fast)}
.chart rect:hover{fill:var(--v)}
.chart text{fill:var(--muted);font:10px var(--font)}
.chart .area{fill:url(#cmArea);stroke:none}
.chart .lineq{fill:none;stroke:var(--b);stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}
.hbar{display:flex;align-items:center;gap:10px;margin:7px 0;font-size:.85rem}
.hbar .l{flex:0 0 38%;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hbar .bar{flex:1}.hbar b{flex:0 0 auto;min-width:2ch;text-align:end;font-variant-numeric:tabular-nums}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--ok);margin-inline-end:7px;box-shadow:0 0 0 3px color-mix(in srgb,var(--ok) 22%,transparent)}
.dot.off{background:var(--bad);box-shadow:0 0 0 3px color-mix(in srgb,var(--bad) 22%,transparent)}
.adminwrap{display:grid;grid-template-columns:210px 1fr;gap:22px;align-items:start}
.adminnav{position:sticky;top:calc(var(--bar-h) + 16px);display:flex;flex-direction:column;gap:3px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-m);padding:8px;box-shadow:var(--sh-1)}
.adminnav a{display:flex;align-items:center;gap:10px;padding:10px 13px;border-radius:10px;color:var(--muted);font-weight:650;font-size:.88rem;transition:var(--t-fast)}
.adminnav a:hover{background:var(--surface2);color:var(--text);text-decoration:none}
.adminnav a.on{background:var(--brand);color:#fff}
.adminnav .sep{height:1px;background:var(--line);margin:6px 4px}
.kpi{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.kpi .stat b{font-size:1.5rem}
.spark{display:block;width:100%;height:30px;overflow:visible}
.spark path{fill:none;stroke:var(--b);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.spark .f{fill:color-mix(in srgb,var(--b) 16%,transparent);stroke:none}
.pill{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:99px;font-size:.74rem;font-weight:700;background:var(--surface2);color:var(--muted)}
.pill.ok{background:color-mix(in srgb,var(--ok) 15%,transparent);color:var(--ok)}
.pill.bad{background:color-mix(in srgb,var(--bad) 15%,transparent);color:var(--bad)}
.pill.warn{background:color-mix(in srgb,var(--warn) 18%,transparent);color:var(--warn)}

/* ---------------------------------------------------------------- real labs */
.labgrid{display:grid;grid-template-columns:minmax(300px,390px) minmax(0,1fr);gap:16px;align-items:start}
.labgrid>*{min-width:0}
.termbox{background:#060C1B;border:1px solid #15223F;border-radius:var(--r-m);padding:9px;direction:ltr;min-height:340px;position:relative;overflow:hidden;max-width:100%}
.termbox .xterm{height:100%}
.termhost{height:min(62vh,560px);min-height:300px;width:100%;overflow:hidden}
.termbar{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
.termbar .grow{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.85rem}
.keys{display:none;gap:6px;overflow-x:auto;padding:8px 0 2px;direction:ltr;-webkit-overflow-scrolling:touch}
.keys button{flex:none;min-width:44px;min-height:40px;border-radius:10px;border:1px solid #1B2C4F;background:#101B33;color:#CFE3FF;font:650 13px var(--mono);cursor:pointer}
.keys button.on{background:var(--b);color:#fff;border-color:var(--b)}
.spinner{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--b);border-radius:50%;animation:spin .9s linear infinite;display:inline-block;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}
.vmscreen{background:#000;border-radius:12px;padding:6px;overflow:auto;direction:ltr;min-height:260px;max-width:100%}
.vmscreen canvas{max-width:100%;height:auto}
.vmtext{white-space:pre;font:14px/14px monospace;color:#ddd}
.cmdbox{display:flex;gap:8px;margin-top:10px}
.cmdbox input{direction:ltr;text-align:left;font-family:var(--mono)}
.labtabs{display:none}

/* ---------------------------------------------------------------- search palette */
.overlay{position:fixed;inset:0;background:color-mix(in srgb,#040814 68%,transparent);backdrop-filter:blur(6px);z-index:90;
  display:flex;align-items:flex-start;justify-content:center;padding:max(8vh,16px) 16px 16px;animation:fade .2s var(--ease)}
@keyframes fade{from{opacity:0}to{opacity:1}}
.sr-box{width:min(640px,100%);background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-3);
  overflow:hidden;display:flex;flex-direction:column;max-height:80vh;animation:rise .3s var(--ease)}
@keyframes rise{from{opacity:0;transform:translateY(-14px) scale(.97)}to{opacity:1;transform:none}}
.sr-box input{border:0;border-bottom:1px solid var(--line);border-radius:0;padding:18px 20px;font-size:1.05rem;background:transparent}
.sr-box input:focus{outline:none;box-shadow:none}
.sr-list{overflow:auto;padding:7px}
.sr-empty{padding:16px 13px;margin:0}
.sr-item{display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:11px;color:var(--text);text-decoration:none!important;transition:background var(--t-fast)}
.sr-item.on,.sr-item:hover{background:var(--surface2)}
.sr-item .tag{flex:0 0 auto;text-transform:uppercase}

/* ---------------------------------------------------------------- gamification */
.ring{display:flex;align-items:center;gap:18px}.ring svg{flex:0 0 auto}
.ring-bg{stroke:var(--surface2)}
.ring-fg{stroke:var(--b);transition:stroke-dasharray 1s var(--ease)}
.ring.done .ring-fg{stroke:var(--ok)}
.ring-t{fill:var(--text);font:700 15px var(--font)}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(148px,100%),1fr));gap:11px}
.badge{display:flex;flex-direction:column;align-items:center;text-align:center;gap:3px;padding:16px 11px;border:1px solid var(--line);border-radius:var(--r-m);
  background:var(--surface2);min-width:0;transition:transform var(--t) var(--ease),box-shadow var(--t)}
.badge:not(.off):hover{transform:translateY(-3px) scale(1.02);box-shadow:var(--sh-2)}
.badge:not(.off){background:var(--brand-soft);border-color:color-mix(in srgb,var(--b) 28%,transparent)}
.badge .bi{font-size:2rem;line-height:1.2}
.badge.off{opacity:.5;filter:grayscale(1)}
.badge b{font-size:.87rem}.badge .small{font-size:.74rem;line-height:1.4}
.next{display:flex;align-items:center;gap:18px;flex-wrap:wrap;border:1px solid color-mix(in srgb,var(--b) 30%,var(--line));
  background:linear-gradient(120deg,color-mix(in srgb,var(--v) 9%,var(--surface)),var(--surface) 60%)}
.next h3{margin:3px 0 0}
.qr{display:flex;justify-content:center;padding:14px;background:#fff;border-radius:var(--r-m);width:fit-content;margin-inline:auto}
.qr img{display:block;image-rendering:pixelated}
.note-prev{white-space:pre-wrap;margin:2px 0 10px}
/* confetti */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:95;overflow:hidden}
.confetti i{position:absolute;width:9px;height:14px;top:-20px;border-radius:2px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(105vh) rotate(720deg);opacity:.1}}

/* ---------------------------------------------------------------- games */
.arcade{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr));gap:16px}
.gcard{position:relative;overflow:hidden;color:inherit;display:flex;flex-direction:column;gap:9px;padding:22px;border-radius:var(--r-l);
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--sh-2);transition:transform var(--t) var(--ease),box-shadow var(--t)}
.gcard:hover{text-decoration:none;transform:translateY(-4px);box-shadow:var(--sh-3)}
.gcard .gic{font-size:2rem;line-height:1}
.gcard .glow{position:absolute;width:160px;height:160px;border-radius:50%;top:-70px;inset-inline-end:-50px;background:var(--brand);opacity:.16;filter:blur(18px);transition:opacity var(--t)}
.gcard:hover .glow{opacity:.32}
.gbest{font-variant-numeric:tabular-nums}
.gplay{display:grid;gap:16px;max-width:760px;margin-inline:auto}
.ghud{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:space-between}
.gtimer{height:6px;border-radius:99px;background:var(--surface2);overflow:hidden}
.gtimer i{display:block;height:100%;background:var(--brand);width:100%;transition:width 1s linear}
.gtimer.low i{background:linear-gradient(90deg,var(--bad),#FF8A5B)}
.gquestion{font-size:clamp(1.1rem,3.4vw,1.5rem);font-weight:700;text-align:center;margin:8px 0;letter-spacing:-.02em}
.gquestion .mono{font-size:.9em}
.gopts{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(150px,100%),1fr));gap:10px}
.gopt{padding:16px 14px;border:1px solid var(--line-strong);border-radius:var(--r-m);background:var(--surface);cursor:pointer;
  font:650 .98rem var(--mono);text-align:center;transition:var(--t-fast) var(--ease);min-height:56px;color:var(--text)}
.gopt:hover:not(:disabled){border-color:var(--b);background:var(--brand-soft);transform:translateY(-2px)}
.gopt:disabled{cursor:default}
.gopt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok);animation:pop .35s var(--ease)}
.gopt.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad);animation:shake .4s var(--ease)}
.gstreak{display:inline-flex;align-items:center;gap:5px;font-weight:700;color:var(--amber)}
.gscore{font:800 2.6rem/1 var(--font);letter-spacing:-.04em;font-variant-numeric:tabular-nums}
.gend{text-align:center;padding:14px 0}
.glist{display:flex;flex-direction:column;gap:7px}
.gstat{display:flex;justify-content:space-between;gap:12px;padding:9px 13px;border-radius:10px;background:var(--surface2);font-size:.87rem}

/* ---------------------------------------------------------------- motion */
@keyframes viewin{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.view-in{animation:viewin .34s var(--ease) both}
@keyframes revealup{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.reveal{animation:revealup .5s var(--ease) both}
.skel{background:linear-gradient(90deg,var(--surface2) 25%,var(--surface3) 37%,var(--surface2) 63%);background-size:400% 100%;
  animation:shimmer 1.4s ease-in-out infinite;border-radius:10px;min-height:14px}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}
.loadbar{position:fixed;top:0;inset-inline:0;height:3px;z-index:60;background:var(--brand);transform-origin:0 50%;transform:scaleX(0);
  transition:transform .3s var(--ease),opacity .3s}
:root[dir=rtl] .loadbar{transform-origin:100% 50%}
.count{font-variant-numeric:tabular-nums}

/* ---------------------------------------------------------------- responsive */
@media(max-width:980px){.adminwrap{grid-template-columns:1fr}.adminnav{position:static;flex-direction:row;overflow-x:auto;scrollbar-width:none}.adminnav a{white-space:nowrap}.adminnav .sep{display:none}}
@media(max-width:900px){
  .labgrid{grid-template-columns:minmax(0,1fr)}
  .hero{grid-template-columns:1fr;gap:22px;padding-top:10px}
  .hero svg{max-height:210px}
  .keys{display:flex}
  .termhost{height:min(40vh,340px);min-height:220px}
  .labtabs{display:flex}
  .labgrid[data-tab=tasks] .pane-term{display:none}
  .labgrid[data-tab=term] .pane-tasks{display:none}
}
@media(max-width:820px){
  :root{--tab-h:66px;--bar-h:58px}
  .links{display:none}
  .links.open{display:flex;position:fixed;top:calc(var(--bar-h) + env(safe-area-inset-top));inset-inline:0;flex-direction:column;background:var(--surface);
    padding:10px 16px 14px;border-bottom:1px solid var(--line);box-shadow:var(--sh-3);z-index:40;max-height:72vh;overflow:auto;animation:rise .25s var(--ease)}
  .links.open a{padding:14px 12px;font-size:1rem}
  .links.open a.show-m{display:block!important}
  .links.open a::after{display:none}
  .right .btn.sm.hide-m,.xp.hide-m{display:none}
  .tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;bottom:0;inset-inline:0;z-index:35;
    background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(14px);border-top:1px solid var(--line);
    height:calc(var(--tab-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}
  .tabbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--muted);font-size:.66rem;font-weight:650;
    min-width:0;padding:7px 2px;transition:color var(--t-fast)}
  .tabbar a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--t) var(--ease)}
  .tabbar a.on{color:var(--b);text-decoration:none}
  .tabbar a.on svg{transform:translateY(-2px) scale(1.08)}
  .tabbar a span{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  main{padding-top:20px}
  .card{padding:17px;border-radius:var(--r-m)}
  .two{grid-template-columns:1fr}
  .task{grid-template-columns:auto 1fr}
  .task>span:nth-child(3){display:none}
  .task .ctl{grid-column:1/3}
  th,td{padding:9px 9px}
  .stat b{font-size:1.35rem}
  .brand small{display:none}
  .cert{padding:30px 18px}
}
@media(min-width:821px){.menu-btn{display:none}}
@media(hover:none){a.card:hover,.gcard:hover,.toolcard:hover{transform:none}}
@media print{.nav,footer,.noprint,.tabbar,.banner,.overlay,.loadbar{display:none!important}body{background:#fff}body::before{display:none}main{padding:0}.cert{box-shadow:none;border:1px solid #999}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}}