/* ReadingTracks default theme: deep blue + green. Edit these variables to
   reskin for your own reading club. */
:root{
  --primary:#043C77; --primary-dark:#053056; --accent:#00923F; --accent-light:#7FD4A2;
  --bg:#F7F5F0; --surface:#fff;
  --text:#12233A; --text-muted:#5C6B7E; --border:#DCD7CC;
  --chip-bg:#E7EDF5; --theme-bg:#EEEBE4;
  --radius:10px; --scroll-offset:220px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:"IBM Plex Sans",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px; line-height:1.5;
}
a{color:var(--primary)}

/* ---------- header ---------- */
.site-header{
  background:var(--primary); color:#fff;
  width:100%; margin:0; padding:30px 0 26px;
}
.site-header > div{
  width:min(1080px,calc(100% - 40px)); margin-inline:auto;
}
.header-inner{ display:flex; align-items:center; gap:20px; }
.header-logo{
  display:block; flex:0 0 auto; border-radius:8px; overflow:hidden;
  box-shadow:0 4px 14px rgba(0,0,0,.22);
}
.header-logo img{ display:block; width:180px; height:108px; object-fit:cover; }
.site-header h1{
  font-family:Fraunces,Georgia,serif; font-weight:700;
  font-size:clamp(28px,5.5vw,44px); line-height:1.03; margin:0;
  letter-spacing:-.01em; color:#fff;
}
.site-header p{
  margin:8px 0 0; font-size:15px; color:#C6D6EA; max-width:60ch;
}
.site-header a{
  color:#fff; text-decoration:underline; text-decoration-color:rgba(255,255,255,.5);
}
.site-header a:hover{ text-decoration-color:#fff; }

/* ---------- layout ---------- */
main{ width:min(1080px,calc(100% - 40px)); margin-inline:auto; }
footer{
  width:min(1080px,calc(100% - 40px)); margin:44px auto 0;
  padding:20px 0 42px; border-top:1px solid var(--border);
  font-size:13px; color:var(--text-muted);
}

/* ---------- controls ---------- */
.controls{
  position:sticky; top:0; z-index:20;
  background:color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  padding:16px 0 16px;
}
input,select,button{ font:inherit; }
#search{
  width:100%; border:1px solid var(--border); border-radius:var(--radius);
  background:var(--surface); color:var(--text); padding:12px 14px; outline:none;
}
#search::placeholder{ color:#9AA6B4; }
#search:focus{ border-color:var(--primary); }

/* area: pill-shaped chips */
.chips{ display:flex; gap:8px; flex-wrap:wrap; margin:12px 0; }
.chip{
  appearance:none; cursor:pointer;
  background:var(--surface); border:1px solid var(--border); color:var(--text-muted);
  border-radius:999px; padding:7px 13px;
  font:500 13px/1.3 "IBM Plex Sans",sans-serif;
}
.chip.active{ background:var(--primary); border-color:var(--primary); color:#fff; }

/* labeled selects */
.select-row{
  display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px;
}
.select-row label{
  color:var(--text-muted);
  font:600 11px/1 "IBM Plex Mono",monospace; letter-spacing:.06em; text-transform:uppercase;
}
.select-row select{
  display:block; width:100%; margin-top:5px; padding:9px 10px;
  border:1px solid var(--border); border-radius:var(--radius);
  background:var(--surface); color:var(--text);
}
.select-row select:focus{ outline:none; border-color:var(--primary); }

/* tabs + clear */
.view-row{
  display:flex; justify-content:space-between; gap:10px; align-items:center; margin-top:14px;
}
.control-actions{ display:flex; gap:8px; flex-wrap:wrap; }
.tabs{ display:flex; gap:6px; flex-wrap:wrap; }
.tab{
  appearance:none; cursor:pointer;
  background:none; border:1px solid transparent; color:var(--text-muted);
  border-radius:999px; padding:8px 14px;
  font:600 12px/1 "IBM Plex Mono",monospace; letter-spacing:.06em; text-transform:uppercase;
}
.tab:hover{ color:var(--primary); }
.tab.active{ background:var(--primary); color:#fff; border-color:var(--primary); }
.secondary{
  appearance:none; cursor:pointer;
  background:none; color:var(--text-muted); border:1px solid var(--border);
  border-radius:var(--radius); padding:8px 14px;
  font:600 13px/1 "IBM Plex Sans",sans-serif;
}
.secondary:hover{ border-color:var(--primary); color:var(--primary); }
.secondary:disabled{ cursor:not-allowed; opacity:.55; }
.danger{
  appearance:none; cursor:pointer; border:1px solid #9E2F25; border-radius:var(--radius);
  background:#9E2F25; color:#fff; padding:9px 14px; font:600 13px/1 "IBM Plex Sans",sans-serif;
}
.danger:hover{ background:#7F231B; border-color:#7F231B; }

/* ---------- dialogs ---------- */
.confirmation-dialog{
  width:min(440px,calc(100% - 32px)); padding:0; border:1px solid var(--border);
  border-radius:14px; background:var(--surface); color:var(--text);
  box-shadow:0 20px 60px rgba(18,35,58,.28);
}
.confirmation-dialog::backdrop{ background:rgba(5,28,50,.58); backdrop-filter:blur(2px); }
.confirmation-dialog form{ padding:24px; }
.confirmation-dialog h2{
  margin:0 0 9px; font:600 24px/1.2 Fraunces,Georgia,serif;
}
.confirmation-dialog p{ margin:0; color:var(--text-muted); font-size:14px; }
.dialog-actions{ display:flex; justify-content:flex-end; gap:9px; margin-top:22px; }

/* ---------- summary ---------- */
.summary{
  padding:18px 0 10px; color:var(--text-muted);
  display:flex; gap:10px; flex-wrap:wrap; align-items:baseline;
  scroll-margin-top:var(--scroll-offset);
  font:400 13px/1.4 "IBM Plex Mono",monospace;
}
.summary strong{ color:var(--text); font-weight:600; }

.grouping-nav{
  display:grid; grid-template-columns:auto minmax(0,1fr); gap:10px; align-items:center;
  padding:2px 0 14px;
}
.grouping-nav[hidden]{ display:none; }
.grouping-nav-label{
  color:var(--text-muted);
  font:600 11px/1 "IBM Plex Mono",monospace;
  letter-spacing:.08em; text-transform:uppercase;
}
.grouping-nav-links{
  display:flex; flex-wrap:nowrap; gap:7px;
  min-width:0; overflow-x:auto; overscroll-behavior-inline:contain;
  padding:2px 5px 7px;
  scrollbar-width:thin; scrollbar-color:var(--border) transparent;
  -webkit-overflow-scrolling:touch;
  -webkit-mask-image:linear-gradient(to right,transparent,#000 6px,#000 calc(100% - 6px),transparent);
  mask-image:linear-gradient(to right,transparent,#000 6px,#000 calc(100% - 6px),transparent);
}
.grouping-nav-links a{
  flex:0 0 auto;
  color:var(--primary); padding:4px 1px;
  text-decoration:underline; text-decoration-color:var(--border);
  text-underline-offset:3px;
  font:600 12px/1 "IBM Plex Mono",monospace;
}
.grouping-nav-links a:hover{ text-decoration-color:var(--primary); }
.grouping-nav-links .track-nav-link{ display:inline-flex; align-items:center; gap:5px; }
.grouping-nav-links .track-nav-link.is-progress{
  color:#076B37; font-weight:600; text-decoration-color:var(--accent-light);
}
.grouping-nav-links .track-nav-link.is-complete{
  color:#076B37; text-decoration-color:var(--accent);
}
.track-nav-status{
  display:inline-flex; align-items:center; justify-content:center; min-width:22px; height:18px;
  padding:0 5px; border-radius:999px; background:#DDF3E6; color:#076B37;
  font:600 10px/1 "IBM Plex Mono",monospace;
}
.track-nav-link.is-complete .track-nav-status{
  min-width:18px; padding:0; background:var(--accent); color:#fff;
}
.grouping-nav-separator{
  flex:0 0 auto; align-self:center; color:var(--text-muted);
  font:400 12px/1 "IBM Plex Mono",monospace;
}

/* ---------- results ---------- */
.results{ display:grid; gap:12px; padding-bottom:48px; }
.card{
  background:var(--surface); border:1px solid var(--border);
  border-left:3px solid var(--accent); border-radius:var(--radius);
  padding:16px 18px;
}
.card h2{
  font-family:Fraunces,Georgia,serif; font-weight:500;
  font-size:19px; line-height:1.25; margin:0 0 6px; color:var(--text);
}
.link-like{
  appearance:none; cursor:pointer; background:none; border:0; padding:0;
  font:inherit; color:inherit; text-align:left;
}
.link-like:hover{ color:var(--primary); text-decoration:underline; }
.card h3{ margin:0 0 6px; }
.meta{ color:var(--text-muted); font-size:14px; margin-bottom:8px; }
.badges{ display:flex; flex-wrap:wrap; gap:6px; margin:9px 0; }
.badge{
  background:var(--chip-bg); color:var(--primary);
  border-radius:4px; padding:5px 7px;
  font:500 11px/1 "IBM Plex Mono",monospace; letter-spacing:.03em;
}
.card p{ margin:8px 0; font-size:14.5px; color:#33465C; }
.card a{
  color:var(--primary); text-decoration:none;
  border-bottom:1px solid #B9C8DA; font-size:13px;
}
.card a:hover{ border-bottom-color:var(--primary); }

/* paper bookmarks */
.paper-card{ position:relative; }
.paper-card h2{ padding-right:42px; }
.bookmark-button{
  position:absolute; top:12px; right:13px; display:flex; align-items:center; justify-content:center;
  width:38px; height:38px; padding:0; cursor:pointer; color:var(--text-muted);
  background:transparent; border:1px solid transparent; border-radius:999px;
}
.bookmark-button:hover{ color:var(--primary); background:var(--chip-bg); }
.bookmark-button[aria-pressed="true"]{ color:var(--primary); background:var(--chip-bg); }
.paper-card.is-bookmarked{ border-left-color:var(--primary); }

/* guided reading tracks */
.track-card{ padding:20px; scroll-margin-top:var(--scroll-offset); border-left-color:var(--border); }
.track-card.track-in-progress{ border-left-color:var(--accent); border-left-width:5px; }
.track-card.track-complete{ border-left-color:var(--primary); }
.track-card-header{
  display:grid; grid-template-columns:minmax(0,1fr) auto; gap:18px; align-items:start;
}
.track-card-header h2{ font-size:22px; margin-bottom:8px; }
.track-facts,.track-difficulty{ color:var(--text-muted); font-size:13px; }
.track-difficulty strong{ color:var(--text); font-weight:600; }
.track-areas{ margin-bottom:4px; }
.track-toggle{
  cursor:pointer; border:1px solid var(--primary); border-radius:999px;
  background:var(--primary); color:#fff; padding:9px 14px;
  font:600 13px/1 "IBM Plex Sans",sans-serif;
}
.track-toggle:hover{ background:var(--primary-dark); }
.track-progress-row{
  display:grid; grid-template-columns:minmax(120px,260px) auto; gap:10px; align-items:center;
  margin-top:14px; color:var(--text-muted); font-size:12px;
}
.track-progress-row progress{
  width:100%; height:8px; border:0; border-radius:999px; overflow:hidden;
  background:var(--chip-bg); color:var(--accent);
}
.track-progress-row progress::-webkit-progress-bar{ background:var(--chip-bg); }
.track-progress-row progress::-webkit-progress-value{ background:var(--accent); border-radius:999px; }
.track-progress-row progress::-moz-progress-bar{ background:var(--accent); border-radius:999px; }
.track-difficulty{ margin-top:5px; }
.track-journey{ margin-top:20px; padding-top:18px; border-top:1px solid var(--border); }
.track-journey-heading{ display:flex; justify-content:space-between; gap:16px; align-items:baseline; }
.track-journey-heading h3{
  margin:0; font:600 12px/1 "IBM Plex Mono",monospace;
  letter-spacing:.1em; text-transform:uppercase; color:var(--text-muted);
}
.track-paper-view{ font-size:13px; }
.track-steps{ list-style:none; margin:18px 0 0; padding:0; }
.track-step{
  position:relative; display:grid; grid-template-columns:34px minmax(0,1fr) auto;
  gap:12px; padding:0 0 24px; align-items:start;
}
.track-step:not(:last-child)::after{
  content:""; position:absolute; left:16px; top:34px; bottom:0;
  width:2px; background:var(--border);
}
.track-step-number{
  position:relative; z-index:1; display:flex; align-items:center; justify-content:center;
  width:34px; height:34px; border-radius:50%; background:var(--primary); color:#fff;
  font:600 12px/1 "IBM Plex Mono",monospace;
}
.track-step.is-complete .track-step-number{ background:var(--accent); }
.track-step-content{ min-width:0; padding-top:3px; }
.track-step-content h4{
  margin:0 0 5px; font:500 17px/1.3 Fraunces,Georgia,serif; color:var(--text);
}
.track-step.is-complete .track-step-content h4{ text-decoration:line-through; text-decoration-color:var(--text-muted); }
.track-step-content p{ margin:7px 0; }
.completion-control{
  display:flex; gap:7px; align-items:center; cursor:pointer; white-space:nowrap;
  padding:7px 0; color:var(--text-muted); font-size:12px;
}
.completion-control input{ width:17px; height:17px; accent-color:var(--accent); }

/* grouping by year/decade */
.year-group{ display:grid; gap:12px; margin-bottom:22px; scroll-margin-top:var(--scroll-offset); }
.year-heading{
  margin:22px 0 4px; padding-bottom:8px; border-bottom:1px solid var(--border);
  font:600 13px/1 "IBM Plex Mono",monospace; letter-spacing:.14em; color:var(--text-muted);
  text-transform:uppercase;
}

.empty{ text-align:center; padding:48px 12px; color:var(--text-muted); }
.back-to-results{
  position:fixed; right:calc(20px + env(safe-area-inset-right));
  bottom:calc(20px + env(safe-area-inset-bottom)); z-index:30;
  display:inline-flex; align-items:center; justify-content:center; gap:7px;
  min-height:44px; padding:10px 15px;
  color:#fff; background:var(--primary); border:1px solid var(--primary-dark);
  border-radius:999px; box-shadow:0 4px 14px rgba(0,0,0,.2);
  font:600 13px/1 "IBM Plex Sans",sans-serif; text-decoration:none;
}
.back-to-results:hover{ background:var(--primary-dark); }
.back-to-results[hidden]{ display:none; }
:focus-visible{ outline:3px solid var(--accent); outline-offset:2px; }

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
}

@media (max-width:780px){
  .select-row{ grid-template-columns:1fr 1fr; }
  .view-row{ align-items:flex-start; flex-direction:column; }
  .control-actions{ width:100%; }
  .controls{ position:static; }
  .grouping-nav{ grid-template-columns:1fr; gap:5px; }
}
@media (max-width:640px){
  .track-card-header{ grid-template-columns:1fr; gap:10px; }
  .track-toggle{ justify-self:start; }
  .track-progress-row{ grid-template-columns:1fr; gap:5px; }
  .track-step{ grid-template-columns:34px minmax(0,1fr); }
  .completion-control{ grid-column:2; padding-top:0; }
}
@media (max-width:480px){
  .header-inner{ align-items:flex-start; gap:12px; }
  .header-logo img{ width:135px; height:81px; }
  .select-row{ grid-template-columns:1fr; }
  .back-to-results{
    right:calc(12px + env(safe-area-inset-right));
    bottom:calc(12px + env(safe-area-inset-bottom));
  }
}