/* ============================================================
   MET ROULETTE — after the NYCTA Graphics Standards Manual, 1970
   One typeface. Flat color. Strict grid. No decoration.
   ============================================================ */
:root{
  /* Line identity colors (trunk-line system) */
  --line-123:#EE352E;   /* Broadway–7 Av (IRT) — the heart / favorites */
  --line-456:#00933C;
  --line-7:#B933AD;
  --line-ace:#2850AD;
  --line-bdfm:#FF6319;
  --line-g:#6CBE45;
  --line-jz:#996633;
  --line-l:#A7A9AC;
  --line-nqrw:#FCCC0A;
  --line-s:#808183;

  /* Structural */
  --panel:#000000;
  --paper:#FFFFFF;
  --paper-alt:#F3F3F3;
  --ink:#000000;
  --ink-2:#4A4A4A;
  --reverse:#FFFFFF;
  --info-blue:#0062CF;
  --hazard:#FCCC0A;
  --rule:#D9D9D9;

  --sans:"Helvetica Neue",Helvetica,Arial,sans-serif;
  --module:4.5rem;
  --pin:2px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  font-size:17px;
  line-height:1.5;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
body.panel-open,body.lightbox-open{overflow:hidden}
.is-hidden{display:none !important}

button,select{font:inherit;color:inherit}
a{color:var(--info-blue)}

/* ---------- Signage panel: black ground, white pinstripe ---------- */
.sign{
  background:var(--panel);
  color:var(--reverse);
  position:relative;
  padding:1.5rem;
}
.sign::before{
  content:"";
  position:absolute;
  top:.5rem;left:0;right:0;
  height:var(--pin);
  background:var(--reverse);
}

/* ---------- Bullets (roundels) ---------- */
.bullet{
  display:inline-flex;align-items:center;justify-content:center;
  width:2.4em;height:2.4em;border-radius:50%;
  background:var(--line-s);color:#fff;
  font-weight:700;font-size:1rem;line-height:1;
  flex:none;user-select:none;
}
.b-met{background:var(--line-123)}

/* ---------- Arrows ---------- */
.arrow{fill:currentColor;flex:none}
.arrow.a45{transform:rotate(45deg)}
.arrow.a90{transform:rotate(90deg)}
.heart-icon{fill:currentColor;flex:none}

/* ---------- Masthead ---------- */
.masthead{padding:2rem 1.5rem 1.25rem}
.masthead::before{top:.6rem}
.masthead-inner{
  max-width:80rem;margin:0 auto;
  display:flex;align-items:center;gap:1.25rem;flex-wrap:wrap;
}
.wordmark{
  display:flex;align-items:center;gap:.7rem;
  text-decoration:none;color:var(--reverse);
}
.wordmark-text{
  font-size:clamp(1.4rem,3.6vw,2.1rem);
  font-weight:700;letter-spacing:-.015em;line-height:1;
}
.controls{
  display:flex;align-items:flex-end;gap:.75rem;
  margin-left:auto;flex-wrap:wrap;
}

/* ---------- Theme field ---------- */
.field{display:flex;flex-direction:column;gap:.3rem}
.field-label{
  font-size:.7rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;
  color:var(--line-l);
}
.select{
  appearance:none;-webkit-appearance:none;
  background:var(--panel);
  color:var(--reverse);
  border:var(--pin) solid var(--reverse);
  border-radius:0;
  font-weight:500;font-size:.9rem;
  padding:.62rem 2.2rem .62rem .8rem;
  max-width:16rem;
  background-image:
    linear-gradient(45deg,transparent 50%,var(--reverse) 50%),
    linear-gradient(135deg,var(--reverse) 50%,transparent 50%);
  background-position:right 1.05rem center,right .65rem center;
  background-size:.4rem .4rem,.4rem .4rem;
  background-repeat:no-repeat;
  cursor:pointer;
}
.select:focus-visible{outline:3px solid var(--hazard);outline-offset:2px}
.select option,.select optgroup{background:var(--panel);color:var(--reverse)}
.select optgroup{font-weight:700;text-transform:uppercase;letter-spacing:.05em;font-size:.8rem}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  border:var(--pin) solid var(--reverse);
  background:var(--panel);color:var(--reverse);
  font-weight:700;font-size:.9rem;
  text-transform:uppercase;letter-spacing:.06em;
  padding:.62rem 1rem;
  cursor:pointer;text-decoration:none;
  border-radius:0;
}
.btn:hover{background:#222}
.btn:focus-visible{outline:3px solid var(--hazard);outline-offset:2px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-solid{background:var(--reverse);color:var(--ink);border-color:var(--reverse)}
.btn-solid:hover{background:var(--line-nqrw);color:var(--ink);border-color:var(--line-nqrw)}
.btn-reverse{border-color:var(--ink);background:var(--paper);color:var(--ink)}
.btn-reverse:hover{background:var(--ink);color:var(--reverse)}
.btn-danger{border-color:var(--line-123);background:var(--paper);color:var(--line-123)}
.btn-danger:hover{background:var(--line-123);color:var(--reverse)}
.btn-ghost .heart-icon{color:var(--line-123)}
.count{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:1.5rem;height:1.5rem;padding:0 .35rem;
  background:var(--line-123);color:#fff;
  font-size:.75rem;font-weight:700;letter-spacing:0;
}
#next-btn.is-spinning{opacity:.5;pointer-events:none}

/* ---------- Line strip ---------- */
.line-strip{display:flex;height:.6rem}
.line-strip i{flex:1}
.hazard-stripe{
  height:1.1rem;
  background:repeating-linear-gradient(-45deg,#000 0 14px,var(--hazard) 14px 28px);
}

/* ---------- Layout ---------- */
.app{display:flex;flex-direction:column;min-height:100vh}
.main{
  flex:1;
  max-width:80rem;width:100%;margin:0 auto;
  padding:2rem 1.5rem 3rem;
}

/* ---------- Status ---------- */
.status{
  min-height:50vh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;
}
.status p{
  font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;
}
.spinner{
  width:2.6rem;height:2.6rem;
  border:var(--pin) solid var(--rule);
  border-top-color:var(--line-123);
  border-radius:50%;
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spinner{animation-duration:2.4s}}

/* ---------- Artwork ---------- */
.artwork{display:grid;gap:0;grid-template-columns:minmax(0,1fr)}
.figure{margin:0}
.image-frame{
  position:relative;
  background:var(--panel);
  border:var(--pin) solid var(--ink);
  display:flex;align-items:center;justify-content:center;
  min-height:clamp(18rem,52vh,38rem);
  overflow:hidden;
}
.art-image{
  display:block;max-width:100%;
  max-height:clamp(18rem,72vh,46rem);
  width:auto;height:auto;
  cursor:zoom-in;
}
.image-placeholder{
  color:var(--line-l);
  font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;
}

/* Toolbar */
.image-toolbar{
  position:absolute;top:0;right:0;
  display:flex;
}
.icon-btn{
  display:inline-flex;align-items:center;gap:.4rem;
  background:var(--panel);color:var(--reverse);
  border:none;
  border-left:var(--pin) solid var(--reverse);
  border-bottom:var(--pin) solid var(--reverse);
  padding:.6rem .8rem;
  font-size:.75rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.06em;
  cursor:pointer;
}
.icon-btn:hover{background:#222}
.icon-btn:focus-visible{outline:3px solid var(--hazard);outline-offset:-3px}
.icon-btn:disabled{opacity:.4;cursor:not-allowed}
.icon-btn-label{display:none}
@media (min-width:720px){.icon-btn-label{display:inline}}

.fav-toggle .heart-icon{fill:none;stroke:currentColor;stroke-width:2px}
.fav-toggle[aria-pressed="true"]{background:var(--line-123)}
.fav-toggle[aria-pressed="true"]:hover{background:#c92a24}
.fav-toggle[aria-pressed="true"] .heart-icon{fill:currentColor;stroke:none}

/* Gallery */
.gallery{
  display:flex;gap:0;flex-wrap:wrap;
  border-left:var(--pin) solid var(--ink);
  border-bottom:var(--pin) solid var(--ink);
}
.gallery-thumb{
  width:4.5rem;height:4.5rem;
  padding:0;border:none;
  border-right:var(--pin) solid var(--ink);
  background:var(--panel);cursor:pointer;
  filter:grayscale(1);opacity:.55;
}
.gallery-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.gallery-thumb.is-active{filter:none;opacity:1}
.gallery-thumb:hover{filter:none;opacity:1}
.gallery-thumb:focus-visible{outline:3px solid var(--hazard);outline-offset:-3px}

/* Caption — station identification sign */
.caption{padding:1.75rem 1.5rem 1.5rem;margin-top:0}
.caption::before{top:.55rem}
.eyebrow{
  font-size:.72rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.1em;
  color:var(--line-l);
  margin-bottom:.5rem;
}
.title{
  font-size:clamp(1.5rem,4.4vw,2.75rem);
  font-weight:700;letter-spacing:-.015em;line-height:1.06;
  text-wrap:balance;max-width:24ch;
}
.artist-line{
  margin-top:.5rem;
  font-weight:500;font-size:1.05rem;
  color:#D6D6D6;max-width:52ch;
}
.caption .btn{margin-top:1.25rem}
.caption .btn-reverse{border-color:var(--reverse);background:var(--panel);color:var(--reverse)}
.caption .btn-reverse:hover{background:var(--reverse);color:var(--ink)}

/* ---------- Error ---------- */
.error{padding:3rem 0;display:flex;flex-direction:column;align-items:flex-start;gap:1.25rem}
.alert{
  border:var(--pin) solid var(--ink);
  display:flex;align-items:center;gap:1rem;
  padding:1rem 1.25rem;max-width:56rem;
}
.alert .tag{
  background:var(--hazard);color:#000;font-weight:700;
  padding:.3rem .6rem;font-size:.75rem;flex:none;
  text-transform:uppercase;letter-spacing:.06em;
}

/* ---------- Footer ---------- */
.footer{margin-top:auto}
.footer .sign{padding:1.75rem 1.5rem}
.footer-inner{max-width:80rem;margin:0 auto}
.footer-inner p{max-width:65ch;font-size:.85rem;color:var(--line-l)}
.footer-inner a{color:var(--reverse)}

/* ---------- Panels (details / favorites) ---------- */
.backdrop{
  position:fixed;inset:0;
  background:rgba(0,0,0,.6);
  z-index:40;
}
.panel{
  position:fixed;top:0;right:0;bottom:0;
  width:min(30rem,100%);
  background:var(--paper);
  border-left:var(--pin) solid var(--ink);
  z-index:50;
  display:flex;flex-direction:column;
}
.panel-header{
  display:flex;align-items:center;gap:1rem;
  padding:1.5rem 1.25rem 1.1rem;
  flex:none;
}
.panel-title{
  font-size:1.05rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;
}
.panel-close{
  margin-left:auto;
  background:none;border:var(--pin) solid var(--reverse);
  color:var(--reverse);
  padding:.35rem;cursor:pointer;line-height:0;
}
.panel-close:hover{background:var(--reverse);color:var(--ink)}
.panel-close:focus-visible{outline:3px solid var(--hazard);outline-offset:2px}
.panel-body{padding:1.5rem 1.25rem 2.5rem;overflow-y:auto;flex:1}

.details-work-title{
  font-size:1.5rem;font-weight:700;letter-spacing:-.01em;line-height:1.1;
}
.artist{margin-top:.6rem;font-weight:500}
.date{color:var(--ink-2);font-size:.9rem;margin-top:.2rem}

.details{margin-top:1.75rem}
.detail{
  padding:.7rem 0;
  border-top:1px solid var(--rule);
}
.detail.is-empty{display:none}
.detail dt{
  font-size:.7rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;
  color:var(--ink-2);
}
.detail dd{margin-top:.2rem;font-size:.95rem}
.actions{margin-top:1.75rem}
.panel-body .btn-solid{background:var(--ink);color:var(--reverse);border-color:var(--ink)}
.panel-body .btn-solid:hover{background:var(--line-nqrw);color:var(--ink);border-color:var(--line-nqrw)}
.object-id{
  margin-top:1.5rem;padding-top:.75rem;
  border-top:var(--pin) solid var(--ink);
  font-size:.75rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.06em;
  color:var(--ink-2);
}

/* ---------- Favorites list ---------- */
.favorites-empty{color:var(--ink-2);font-size:.95rem;max-width:38ch}
.favorites-list{list-style:none}
.favorites-list li{
  display:flex;align-items:center;gap:.9rem;
  padding:.75rem 0;
  border-bottom:1px solid var(--rule);
}
.favorites-list li:first-child{border-top:var(--pin) solid var(--ink)}
.fav-open{
  display:flex;align-items:center;gap:.9rem;
  flex:1;min-width:0;
  background:none;border:none;padding:0;
  text-align:left;cursor:pointer;
}
.fav-open:focus-visible{outline:3px solid var(--hazard);outline-offset:2px}
.fav-thumb{
  width:3.4rem;height:3.4rem;flex:none;
  object-fit:cover;background:var(--panel);
  border:var(--pin) solid var(--ink);
}
.fav-meta{min-width:0}
.fav-title{
  font-weight:700;font-size:.95rem;line-height:1.25;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.fav-sub{
  font-size:.8rem;color:var(--ink-2);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.fav-remove{
  flex:none;background:none;border:var(--pin) solid var(--line-123);
  color:var(--line-123);padding:.35rem;cursor:pointer;line-height:0;
}
.fav-remove:hover{background:var(--line-123);color:#fff}
.fav-remove:focus-visible{outline:3px solid var(--hazard);outline-offset:2px}
.fav-remove .heart-icon{fill:currentColor}
#favorites-clear{margin-top:1.75rem;width:100%}

/* ---------- Lightbox ---------- */
.lightbox{
  position:fixed;inset:0;z-index:60;
  background:var(--panel);
  display:flex;align-items:center;justify-content:center;
  padding:1.5rem;
}
.lightbox-image{max-width:100%;max-height:100%;cursor:zoom-out}
.lightbox-close{
  position:absolute;top:1rem;right:1rem;
  background:var(--panel);color:var(--reverse);
  border:var(--pin) solid var(--reverse);
  padding:.5rem;cursor:pointer;line-height:0;
}
.lightbox-close:hover{background:var(--reverse);color:var(--ink)}
.lightbox-close:focus-visible{outline:3px solid var(--hazard);outline-offset:2px}

/* ---------- Toast ---------- */
.toast{
  position:fixed;bottom:1.25rem;left:50%;transform:translateX(-50%);
  background:var(--panel);color:var(--reverse);
  border-top:var(--pin) solid var(--reverse);
  font-weight:500;font-size:.9rem;
  padding:.8rem 1.4rem;
  opacity:0;pointer-events:none;transition:opacity .2s;
  z-index:70;max-width:calc(100vw - 2rem);text-align:center;
}
.toast.is-visible{opacity:1}

@media (max-width:640px){
  .masthead{padding:1.75rem 1rem 1.1rem}
  .main{padding:1.25rem 1rem 2rem}
  .controls{width:100%;margin-left:0;align-items:stretch}
  .field{flex:1 1 100%}
  .select{max-width:none;width:100%}
  #favorites-btn,#next-btn{flex:1}
  .caption{padding:1.5rem 1rem 1.25rem}
  .footer .sign{padding:1.5rem 1rem}
}