/* ============================================================
   Design direction: transit signage.
   Cool slate + signal blue wayfinding, caution-yellow action.
   Result rows read like a departures board (mono, tabular).
   ============================================================ */

:root{
  --ink:#101418;
  --paper:#fff;
  --panel:#eef1f4;
  --panel-2:#e3e8ed;
  --line:#d2d9e0;
  --muted:#5c6873;
  --accent:#1f4fd8;
  --signal:#ffd400;
  --ok:#0e7c5a;
  --err:#b3261e;
  --wrap:68rem;
  --r:4px;
  --sans:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:400 1rem/1.6 var(--sans);
  font-synthesis-weight:none;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:.18em}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--signal);color:var(--ink);padding:.6rem 1rem;z-index:99}
.skip:focus{left:0}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:1.25rem}
.muted{color:var(--muted)}

/* ---------------------------------------------------------- header */
.site-head{border-bottom:2px solid var(--ink);background:var(--paper);position:sticky;top:0;z-index:20}
.head-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:60px}
.brand{
  font:700 1.0625rem/1 var(--sans);letter-spacing:-.02em;
  text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;gap:.5rem;
}
.brand-mark{color:var(--accent);font-size:1.25rem;line-height:1}
.nav-toggle{
  font:600 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:.55rem .8rem;cursor:pointer;color:var(--ink);
}
.nav-list{list-style:none;margin:0;padding:0;display:none}
.nav-list[data-open="1"]{
  display:block;position:absolute;right:1.25rem;top:58px;
  background:var(--paper);border:1px solid var(--ink);border-radius:var(--r);
  box-shadow:0 12px 28px rgb(16 20 24 / .14);min-width:15rem;padding:.4rem;
}
.nav-list a{
  display:block;padding:.55rem .7rem;text-decoration:none;color:var(--ink);
  font-size:.9375rem;border-radius:3px;
}
.nav-list a:hover,.nav-list a[aria-current]{background:var(--panel)}

@media (min-width:60rem){
  .nav-toggle{display:none}
  .nav-list{display:flex;gap:.25rem;flex-wrap:wrap}
  .nav-list li:nth-child(n+7){display:none}
  .nav-list a{padding:.4rem .6rem;font-size:.875rem}
}

/* ---------------------------------------------------------- hero + tool */
.hero{background:var(--panel);border-bottom:1px solid var(--line);padding:2.25rem 0 2.75rem}
.crumbs{font:400 .8125rem/1 var(--mono);color:var(--muted);margin-bottom:1.25rem}
.crumbs a{color:var(--muted)}
.h1{
  font:700 clamp(1.9rem,7vw,3.25rem)/1.05 var(--sans);
  letter-spacing:-.03em;margin:0 0 .6rem;max-width:20ch;
}
.sub{margin:0 0 1.75rem;font-size:1.0625rem;color:var(--muted);max-width:52ch}

.tool{margin:0}
.tool-row{display:flex;flex-direction:column;gap:.5rem}
#ig-url{
  width:100%;font:400 1rem/1.2 var(--mono);
  padding:1.05rem 1rem;border:2px solid var(--ink);border-radius:var(--r);
  background:var(--paper);color:var(--ink);min-height:56px;
}
#ig-url::placeholder{color:#9aa5af}
.btn-go{
  font:700 .9375rem/1 var(--sans);letter-spacing:.01em;
  background:var(--signal);color:var(--ink);
  border:2px solid var(--ink);border-radius:var(--r);
  padding:1.05rem 1.6rem;min-height:56px;cursor:pointer;
  box-shadow:3px 3px 0 var(--ink);transition:transform .08s,box-shadow .08s;
}
.btn-go:hover{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--ink)}
.btn-go:active{transform:translate(3px,3px);box-shadow:0 0 0 var(--ink)}
.btn-go[disabled]{opacity:.55;cursor:progress;box-shadow:none;transform:none}
.tool-note{font:400 .8125rem/1.5 var(--mono);color:var(--muted);margin:.75rem 0 0}

@media (min-width:40rem){
  .tool-row{flex-direction:row}
  #ig-url{flex:1}
}

/* ---------------------------------------------------------- result tray */
/* min-height reserved so revealing the tray does not shift the page (CLS) */
.tray{margin-top:1.5rem;min-height:0}
.tray[data-state]{min-height:104px}
.tray-inner{
  border:2px solid var(--ink);border-radius:var(--r);background:var(--paper);
  overflow:hidden;animation:slot .22s ease-out;
}
@keyframes slot{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .tray-inner{animation:none}
  .btn-go{transition:none}
}

.tray-msg{padding:1.1rem 1.15rem;font-size:.9375rem;display:flex;gap:.7rem;align-items:flex-start}
.tray-msg.is-err{border-left:5px solid var(--err)}
.tray-msg.is-load{border-left:5px solid var(--accent);font-family:var(--mono);font-size:.875rem}

.tray-head{
  display:flex;justify-content:space-between;gap:1rem;align-items:baseline;
  padding:.7rem 1.15rem;background:var(--ink);color:#fff;
  font:600 .75rem/1.4 var(--mono);text-transform:uppercase;letter-spacing:.09em;
}
.tray-head .author{text-transform:none;letter-spacing:0;color:#c9d2db}

.row{
  display:grid;grid-template-columns:64px 1fr;gap:.9rem;align-items:center;
  padding:.85rem 1.15rem;border-top:1px solid var(--line);
}
.row:first-child{border-top:0}
.row-thumb{
  width:64px;height:64px;object-fit:cover;background:var(--panel-2);
  border:1px solid var(--line);border-radius:3px;
}
.row-meta{font:400 .8125rem/1.5 var(--mono);color:var(--muted);min-width:0}
.row-meta b{display:block;font:600 .875rem/1.4 var(--mono);color:var(--ink);text-transform:uppercase;letter-spacing:.06em}
.row-act{grid-column:1/-1}
.btn-dl{
  display:block;text-align:center;text-decoration:none;
  font:700 .875rem/1 var(--sans);
  background:var(--signal);color:var(--ink);
  border:2px solid var(--ink);border-radius:var(--r);
  padding:.85rem 1.2rem;box-shadow:2px 2px 0 var(--ink);
}
.btn-dl:hover{color:var(--ink);transform:translate(1px,1px);box-shadow:1px 1px 0 var(--ink)}
.btn-zip{background:var(--paper)}
.tray-foot{padding:.9rem 1.15rem;border-top:1px solid var(--line);background:var(--panel)}
.caption{font-size:.875rem;color:var(--muted);margin:0;max-height:5.6em;overflow:hidden}

@media (min-width:40rem){
  .row{grid-template-columns:72px 1fr auto}
  .row-thumb{width:72px;height:72px}
  .row-act{grid-column:auto}
  .btn-dl{padding:.7rem 1.4rem}
}

/* ---------------------------------------------------------- bands */
.band{padding:2.75rem 0;border-bottom:1px solid var(--line)}
.band-alt{background:var(--panel)}
.h2{
  font:700 1.375rem/1.2 var(--sans);letter-spacing:-.02em;margin:0 0 1.4rem;
  padding-bottom:.6rem;border-bottom:2px solid var(--ink);display:inline-block;
}
.prose{max-width:62ch}
.prose p{margin:0 0 1rem}
.prose h2{font:700 1.375rem/1.2 var(--sans);letter-spacing:-.02em;margin:2rem 0 .8rem}
.prose h3{font:700 1.0625rem/1.3 var(--sans);margin:1.6rem 0 .5rem}
.prose ul,.prose ol{margin:0 0 1rem;padding-left:1.2rem}
.prose li{margin-bottom:.4rem}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.steps li{background:var(--paper);padding:1.1rem 1.15rem;display:grid;gap:.3rem}
.step-n{font:600 .75rem/1 var(--mono);color:var(--accent);letter-spacing:.1em}
.step-name{font:700 1rem/1.3 var(--sans)}
.step-text{color:var(--muted);font-size:.9375rem}
@media (min-width:48rem){.steps{grid-template-columns:repeat(3,1fr)}}

/* faq */
.faq{max-width:62ch;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;padding:.95rem 0;font:700 .9375rem/1.4 var(--sans);
  list-style:none;display:flex;justify-content:space-between;gap:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font:600 1.1rem/1 var(--mono)}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 1rem;color:var(--muted);font-size:.9375rem;max-width:60ch}

/* cards */
.cards{list-style:none;margin:0;padding:0;display:grid;gap:.75rem}
@media (min-width:40rem){.cards{grid-template-columns:repeat(2,1fr)}}
@media (min-width:60rem){.cards-4{grid-template-columns:repeat(4,1fr)}}
.cards a{
  display:flex;flex-direction:column;justify-content:space-between;gap:1.2rem;height:100%;
  padding:1rem;background:var(--paper);border:1px solid var(--ink);border-radius:var(--r);
  text-decoration:none;color:var(--ink);
}
.cards a:hover{background:var(--signal)}
.card-t{font:700 .9375rem/1.3 var(--sans)}
.card-a{font:400 .75rem/1 var(--mono);color:var(--muted);letter-spacing:.06em}

/* ads */
.ad-slot{margin:1.25rem auto;max-width:var(--wrap);padding-inline:1.25rem;text-align:center}
.ad-slot:empty{display:none}

/* ---------------------------------------------------------- footer */
.site-foot{background:var(--ink);color:#c9d2db;padding:2.5rem 0 1.75rem;font-size:.9375rem}
.site-foot a{color:#fff;text-decoration:none}
.site-foot a:hover{color:var(--signal);text-decoration:underline}
.foot-grid{display:grid;gap:1.75rem}
@media (min-width:48rem){.foot-grid{grid-template-columns:2fr 1fr 1fr}}
.foot-brand{font:700 1.0625rem/1 var(--sans);color:#fff;margin:0 0 .5rem}
.foot-h{font:600 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.1em;color:#8c99a5;margin:0 0 .7rem}
.site-foot ul{list-style:none;margin:0;padding:0;display:grid;gap:.45rem}
.foot-note{
  margin:2rem 0 0;padding-top:1.25rem;border-top:1px solid #2a323b;
  font-size:.8125rem;color:#8c99a5;max-width:70ch;
}