/* Shared styles for the picoCTF Solves pages: landing, category, solve. */
:root{
  --bg:#05060a;
  --ink:#ece9f5;
  --text:#cfccdb;
  --muted:#8f8ca3;
  --line:rgba(236,233,245,.14);
  --line-strong:rgba(236,233,245,.32);
  --panel:rgba(14,14,24,.78);
  --violet:#9a7bff;
  --teal:#4fe0c8;
  --coral:#ff6b7d;
  --amber:#ffc46b;
  --easy:#4fe0c8;
  --medium:#ffc46b;
  --hard:#ff6b7d;
  --mono:"Martian Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --gutter:clamp(16px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.1,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;color-scheme:dark}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;overflow-x:hidden}
a{color:inherit}
::selection{background:var(--teal);color:#05060a}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.mono{font-family:var(--mono)}

.skip{
  position:fixed;left:16px;top:-60px;z-index:100;background:var(--ink);color:var(--bg);
  padding:10px 16px;border-radius:4px;font-family:var(--mono);font-size:12px;text-decoration:none;transition:top .2s;
}
.skip:focus{top:16px}

/* ---------- particle canvas ---------- */
#scene{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;display:block}
html.rm #scene, html.no-gl #scene{display:none}
.site{position:relative;z-index:1}

/* ---------- chrome ---------- */
.topfade{
  position:fixed;left:0;right:0;top:0;height:96px;z-index:15;pointer-events:none;
  background:linear-gradient(rgba(5,6,10,.92),rgba(5,6,10,0));
}
.brand{
  position:fixed;top:22px;left:var(--gutter);z-index:20;display:flex;align-items:center;gap:12px;
  text-decoration:none;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
}
.brand svg{width:38px;height:38px;flex:none;transition:transform .4s var(--ease),filter .3s}
.brand:hover svg{transform:rotate(-12deg) scale(1.06);filter:drop-shadow(0 0 8px rgba(var(--gc),.6))}
.brand{top:16px}
.brand span{opacity:.85}
@media (max-width:560px){.brand span{display:none}}
/* --gc: the current category colour (r,g,b); --gi: how strongly it glows (0..1).
   Pages update both as you move, so every static glow follows the category. */
:root{--gc:79,224,200;--gi:1}
.nav{
  position:fixed;top:18px;right:var(--gutter);z-index:20;display:flex;align-items:center;
  padding:5px;border-radius:999px;background:rgba(8,10,16,.6);
  border:1px solid rgba(var(--gc),calc(.15 + .25 * var(--gi)));
  box-shadow:0 0 24px -6px rgba(var(--gc),calc(.45 * var(--gi))),inset 0 0 12px -6px rgba(var(--gc),calc(.5 * var(--gi)));
  transition:border-color .4s,box-shadow .4s;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.nav a{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;text-decoration:none;
  padding:8px 14px;border-radius:999px;transition:background .2s,color .2s;
}
.nav a:hover,.nav a[aria-current]{background:rgba(var(--gc),.14);color:#fff}
.nav .rule{width:18px;height:1px;background:var(--line-strong)}
@media (max-width:420px){.nav a{padding:8px 10px}.nav .rule{width:8px}}

.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);margin:0 0 18px}

/* ---------- glitch ---------- */
.glitch{position:relative;display:inline-block}
.glitch::before,.glitch::after{content:attr(data-text);position:absolute;left:0;top:0;width:100%;opacity:0;pointer-events:none}
.glitch::before{color:var(--coral)}
.glitch::after{color:var(--teal)}
.glitch.is-glitching::before{animation:glitch-a .55s steps(2,end) both}
.glitch.is-glitching::after{animation:glitch-b .55s steps(2,end) both}
@keyframes glitch-a{
  0%{opacity:.9;transform:translate(-6px,0);clip-path:inset(10% 0 60% 0)}
  30%{opacity:.9;transform:translate(5px,0);clip-path:inset(55% 0 20% 0)}
  60%{opacity:.8;transform:translate(-3px,0);clip-path:inset(30% 0 45% 0)}
  100%{opacity:0;transform:none;clip-path:inset(0 0 100% 0)}
}
@keyframes glitch-b{
  0%{opacity:.9;transform:translate(6px,0);clip-path:inset(65% 0 5% 0)}
  30%{opacity:.9;transform:translate(-5px,0);clip-path:inset(5% 0 70% 0)}
  60%{opacity:.8;transform:translate(3px,0);clip-path:inset(40% 0 35% 0)}
  100%{opacity:0;transform:none;clip-path:inset(0 0 100% 0)}
}
html.rm .glitch::before,html.rm .glitch::after{display:none}

/* ---------- shared bits ---------- */
.btn-line{
  display:inline-flex;align-items:center;gap:12px;text-decoration:none;cursor:pointer;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);
  padding:13px 20px;border:1px solid var(--line-strong);border-radius:999px;background:rgba(7,9,26,.7);
  transition:border-color .2s,background .2s;
}
.btn-line:hover{border-color:var(--teal);background:rgba(79,224,200,.08)}
/* primary buttons glow in their section's colour (--c), scaled by --gi */
.btn-line.primary{
  --bc:var(--c,rgb(var(--gc)));
  border-color:color-mix(in srgb,var(--bc) calc(25% + 35% * var(--gi)),transparent);
  box-shadow:0 0 22px -8px color-mix(in srgb,var(--bc) calc(75% * var(--gi)),transparent);
  transition:border-color .3s,box-shadow .3s,background .2s;
}
.btn-line.primary:hover{border-color:var(--bc);background:color-mix(in srgb,var(--bc) 10%,transparent)}
.btn-line .arr{transition:transform .25s var(--ease)}
.btn-line:hover .arr{transform:translateX(4px)}

.dot{display:inline-block;width:8px;height:8px;border-radius:50%;flex:none}

.panel{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:6px;
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.panel::before{
  content:"";position:absolute;top:-1px;left:-1px;width:14px;height:14px;
  border:1px solid var(--c,var(--teal));border-right:0;border-bottom:0;pointer-events:none;
}

.foot{
  position:relative;z-index:1;display:flex;justify-content:center;flex-wrap:wrap;gap:12px 32px;
  padding:40px var(--gutter);border-top:1px solid var(--line);
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
}
.foot a{text-decoration:none}
.foot a:hover{color:var(--ink)}

/* scroll-in */
.js:not(.rm) .reveal{opacity:0;translate:0 28px;transition:opacity .8s var(--ease),translate .9s var(--ease)}
.js:not(.rm) .reveal.is-visible{opacity:1;translate:0 0}

/* ---------- page-to-page animation (View Transitions; ignored by older browsers) ---------- */
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.35s}
::view-transition-group(*){animation-duration:.6s;animation-timing-function:cubic-bezier(.65,0,.25,1)}
/* the morphing card/header blends its two looks instead of stretching one */
::view-transition-old(*),::view-transition-new(*){height:100%;object-fit:fill}
@media (prefers-reduced-motion:reduce){
  @view-transition{navigation:none}
}

/* ---------- typography details ---------- */
h1,h2,h3{text-wrap:balance}
p,li{text-wrap:pretty}
body{font-variant-numeric:tabular-nums}

/* ---------- larger tap targets on touch screens, same look ---------- */
@media (pointer:coarse){
  .switcher button{padding:11px 14px}
  .flag-row button{padding:12px 18px}
  .foot a,.crumbs a{display:inline-block;padding:12px 4px;margin:-12px -4px}
  .pager a{padding:10px 0}
  details.hints summary{padding:8px 0}
  .rail-menu a{padding:14px 12px}
  .nav a{padding:11px 14px}
}

/* small phones: the search button joins the nav, so tighten it to clear the logo */
@media (max-width:480px){
  .nav .rule{display:none}
  .nav a,.nav .cmdk-btn{padding:8px 9px}
}
@media (max-width:350px){
  .nav a,.nav .cmdk-btn{padding:8px 6px;letter-spacing:.03em;font-size:9.5px}
}

/* ---------- category navigator: bottom-left ---------- */
.rail{
  position:fixed;left:var(--gutter);bottom:24px;z-index:12;display:flex;align-items:center;gap:6px;
  padding:6px;border:1px solid var(--line);border-radius:12px;background:rgba(7,8,16,.78);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
}
.rail.is-hidden{opacity:0;pointer-events:none;transform:translateY(10px)}
.rail button{
  all:unset;box-sizing:border-box;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:38px;min-width:38px;padding:0 10px;border-radius:8px;border:1px solid transparent;color:var(--ink);
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;transition:background .2s,border-color .2s;
}
.rail button:hover{background:rgba(255,255,255,.06);border-color:var(--line)}
.rail button:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
.rail button:disabled{opacity:.3;cursor:default;background:none;border-color:transparent}
.rail svg{width:15px;height:15px;flex:none}
.rail .sep{width:1px;height:22px;background:var(--line)}
.rail-now{display:flex;flex-direction:column;justify-content:center;width:204px;flex:none;padding:0 6px;line-height:1.25;overflow:hidden}
.rail-now b{overflow:hidden;text-overflow:ellipsis}
.rail-now small{font-family:var(--mono);font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.rail-now b{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);white-space:nowrap}
.rail-now b i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:8px;background:var(--c,var(--teal));font-style:normal}
.rail .all[aria-expanded="true"]{background:rgba(79,224,200,.12);border-color:rgba(79,224,200,.4)}

.rail-menu{
  position:absolute;left:0;bottom:calc(100% + 8px);min-width:300px;margin:0;padding:6px;list-style:none;
  border:1px solid var(--line-strong);border-radius:12px;background:rgba(9,9,18,.96);
  box-shadow:0 30px 60px -20px rgba(0,0,0,.8);
}
.rail-menu[hidden]{display:none}
.rail-menu a{
  display:grid;grid-template-columns:24px 10px 1fr auto;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;
  text-decoration:none;font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--text);
}
.rail-menu a:hover,.rail-menu a:focus{background:rgba(255,255,255,.06);color:var(--ink);outline:none}
.rail-menu a[aria-current="true"]{background:color-mix(in srgb,var(--c) 14%,transparent);color:var(--ink)}
.rail-menu .n{color:var(--muted);font-size:10px}
.rail-menu .d{width:8px;height:8px;border-radius:50%;background:var(--c)}
.rail-menu .s{color:var(--muted);font-size:9.5px}

@media (max-width:860px){
  .rail{left:0;right:0;bottom:0;border-radius:0;border-width:1px 0 0;padding:8px var(--gutter) calc(8px + env(safe-area-inset-bottom))}
  .rail-now{flex:1;min-width:0;width:auto}
  .rail-now b{overflow:hidden;text-overflow:ellipsis}
  .rail .all span{display:none}
  .rail-menu{left:var(--gutter);right:var(--gutter);min-width:0}
}

/* arriving back from a write-up: the header has already morphed into its card,
   so the cards must not replay their entrance */
.from-solve .catview .grid > li{animation:none!important}

/* ---------- scrollbar: thin neon rail in the category colour ---------- */
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{
  background:
    linear-gradient(90deg,transparent 5px,rgba(var(--gc),.14) 5px 6px,transparent 6px),
    repeating-linear-gradient(180deg,transparent 0 38px,rgba(var(--gc),.22) 38px 39px),
    #05060a;
}
::-webkit-scrollbar-thumb{
  border:3px solid transparent;border-radius:8px;background-clip:padding-box;
  background-color:rgba(var(--gc),.55);
  background-image:linear-gradient(180deg,rgba(255,255,255,.35),transparent 40%,transparent 60%,rgba(0,0,0,.25));
  box-shadow:inset 0 0 6px rgba(var(--gc),.9);
}
::-webkit-scrollbar-thumb:hover{background-color:rgba(var(--gc),.85)}
::-webkit-scrollbar-thumb:active{background-color:rgb(var(--gc))}
::-webkit-scrollbar-corner{background:#05060a}
@supports (-moz-appearance:none){
  html,.cat-overlay{scrollbar-width:thin;scrollbar-color:rgba(var(--gc),.6) #05060a}
}