:root{
  --paper:#F5F1E8;
  --ink:#111111;
  --red:#FF3300;
  --yellow:#FFE600;
  --line:#111111;
  --r:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"Inter",system-ui,sans-serif;background:var(--paper);color:var(--ink);
  line-height:1.5;padding:clamp(12px,3vw,28px)}
.shell{max-width:1180px;margin:0 auto;display:flex;flex-direction:column;gap:14px}

/* topbar */
.topbar{display:flex;justify-content:space-between;align-items:center;
  border-bottom:3px solid var(--line);padding-bottom:12px}
.brand{display:flex;align-items:center;gap:9px}
.glyph{color:var(--red);font-size:22px}
.name{font-family:"Space Grotesk",sans-serif;font-weight:800;font-size:22px;letter-spacing:-.02em}
.tag{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--ink);
  text-transform:uppercase;letter-spacing:.1em;border-left:3px solid var(--red);padding-left:9px}
.help-btn{width:32px;height:32px;border-radius:0;border:2px solid var(--line);
  background:var(--yellow);color:var(--ink);font-size:16px;cursor:pointer;font-weight:800}
.help-btn:hover{box-shadow:2px 2px 0 var(--line)}

/* onboarding */
.onboard{display:flex;align-items:center;gap:12px;background:var(--yellow);
  border:3px solid var(--line);border-left:6px solid var(--red);
  box-shadow:4px 4px 0 var(--line);padding:10px 14px;font-size:13px;color:var(--ink);font-weight:500}
.onboard b{color:var(--red)}
.onboard button{margin-left:auto;background:var(--red);color:#fff;border:2px solid var(--line);
  box-shadow:2px 2px 0 var(--line);padding:6px 12px;font-weight:800;cursor:pointer;white-space:nowrap}
.onboard button:active{transform:translate(2px,2px);box-shadow:0 0 0}

/* layout */
.layout{display:grid;grid-template-columns:minmax(320px,420px) 1fr;gap:16px;align-items:start}
@media(max-width:820px){.layout{grid-template-columns:1fr}}

/* feed */
.feed{background:#fff;border:3px solid var(--line);box-shadow:6px 6px 0 var(--line);
  border-radius:var(--r);overflow:hidden;max-height:82vh;display:flex;flex-direction:column}
.feed-tabs{display:flex;flex-wrap:wrap;gap:6px;padding:10px;border-bottom:3px solid var(--line);
  background:var(--paper);position:sticky;top:0;z-index:2}
.tab{background:#fff;border:2px solid var(--line);color:var(--ink);font-size:13px;
  font-weight:600;padding:6px 12px;border-radius:0;cursor:pointer;font-family:inherit}
.tab:hover{background:var(--yellow)}
.tab.active{background:var(--red);color:#fff;border-color:var(--line)}
.tab.sort{color:var(--ink);border:2px solid var(--line);background:var(--yellow)}
.tab.sort.active{background:var(--yellow);color:var(--ink);box-shadow:3px 3px 0 var(--line)}
#rooms-btn{margin-left:auto;background:var(--yellow);color:var(--ink);border:2px solid var(--line)}
.feed-list{overflow-y:auto;padding:8px}
.fitem{padding:12px;border:2px solid var(--line);box-shadow:3px 3px 0 var(--line);
  background:#fff;cursor:pointer;display:flex;flex-direction:column;gap:6px;margin-bottom:8px;
  transition:transform .08s,box-shadow .08s}
.fitem:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--line)}
.fitem:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--line)}
.fitem.active{background:var(--yellow);border-color:var(--line)}
.fitem-top{display:flex;align-items:baseline;gap:8px}
.frank{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--ink);font-weight:700;min-width:20px}
.ftitle{font-size:14px;font-weight:700;line-height:1.35;flex:1}
.fmeta{display:flex;gap:12px;font-size:11px;color:var(--ink);font-family:"JetBrains Mono",monospace;flex-wrap:wrap;font-weight:600}
.fmeta .score{color:var(--red)}
.fvelo{display:flex;align-items:center;gap:6px;margin-top:2px}
.fvelo-bar{flex:1;height:6px;background:#fff;border:2px solid var(--line);border-radius:0;overflow:hidden}
.fvelo-bar i{display:block;height:100%;background:var(--red);border-radius:0}
.fvelo-num{font-size:10px;color:var(--ink);font-family:"JetBrains Mono",monospace;font-weight:700;min-width:60px;text-align:right}
.hot-badge{font-size:10px;color:var(--ink);background:var(--yellow);padding:1px 6px;border:2px solid var(--line);font-weight:800}

/* reader */
.reader{background:#fff;border:3px solid var(--line);box-shadow:6px 6px 0 var(--red);
  border-radius:var(--r);padding:20px;overflow-y:auto;max-height:82vh;overflow-x:hidden}
.story-actions{margin-bottom:10px}
.save-btn{background:var(--yellow);border:2px solid var(--line);color:var(--ink);
  box-shadow:3px 3px 0 var(--line);border-radius:0;padding:6px 14px;cursor:pointer;font-size:13px;font-weight:800}
.save-btn:active{transform:translate(2px,2px);box-shadow:0 0 0}
.save-btn.saved{background:var(--red);color:#fff}
.story-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--ink);
  font-family:"JetBrains Mono",monospace;margin-bottom:10px;flex-wrap:wrap;font-weight:600}
.story-score{color:var(--red)}
.hot-badge{font-size:10px;color:var(--ink);background:var(--yellow);padding:2px 7px;border:2px solid var(--line);font-weight:800}
.story-title{font-family:"Space Grotesk",sans-serif;font-size:clamp(20px,3vw,28px);
  font-weight:800;line-height:1.15;letter-spacing:-.01em;margin-bottom:8px;
  overflow-wrap:break-word;word-break:break-word;hyphens:auto}
.story-link{display:inline-block;max-width:100%;font-size:12px;color:var(--red);text-decoration:none;
  font-family:"JetBrains Mono",monospace;font-weight:700;margin-bottom:16px;word-break:break-all;overflow-wrap:anywhere}
.story-link:hover{text-decoration:underline;background:var(--yellow)}
.velobar{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--paper);
  border:2px solid var(--line);box-shadow:3px 3px 0 var(--line);margin-bottom:14px}
.velo-label{font-size:11px;color:var(--ink);font-weight:700;white-space:nowrap;text-transform:uppercase;letter-spacing:.05em}
.velo-track{flex:1;height:10px;background:#fff;border:2px solid var(--line);border-radius:0;overflow:hidden}
.velo-fill{height:100%;background:var(--red);border-radius:0;width:0;transition:width .4s}
.velo-num{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--ink);font-weight:800;white-space:nowrap}
.summary-btn{background:var(--yellow);border:2px solid var(--line);color:var(--ink);
  box-shadow:3px 3px 0 var(--line);border-radius:0;padding:9px 14px;cursor:pointer;font-size:13px;font-weight:800;margin-bottom:12px}
.summary-btn:hover{background:#fff}
.summary-btn:active{transform:translate(2px,2px);box-shadow:0 0 0}
.summary-box{background:#fff;border:2px solid var(--line);border-left:6px solid var(--red);
  box-shadow:4px 4px 0 var(--line);padding:14px 16px;font-size:14px;line-height:1.6;margin-bottom:14px;color:var(--ink);font-weight:500}
.summary-box .sum-head{display:flex;align-items:center;gap:7px;font-family:"JetBrains Mono",monospace;
  font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--red);margin-bottom:10px;font-weight:700}
.summary-box ul{list-style:none;display:flex;flex-direction:column;gap:10px;margin:0;padding:0}
.summary-box li{position:relative;padding-left:20px;color:var(--ink);font-weight:500}
.summary-box li::before{content:"▸";position:absolute;left:0;color:var(--red);font-weight:800}
.summary-box.loading{color:var(--ink);font-style:italic;border-left-color:var(--line);font-weight:600}
.summary-box.error{color:var(--red);border-left-color:var(--red);font-weight:700}
.comments{display:flex;flex-direction:column;gap:14px}
.cm{font-size:14px;line-height:1.55}
.cm-head{display:flex;gap:10px;align-items:center;font-size:12px;color:var(--ink);
  font-family:"JetBrains Mono",monospace;margin-bottom:4px;font-weight:600}
.cm-by{color:var(--ink);font-weight:800}
.cm-text{padding-left:12px;border-left:3px solid var(--line);color:var(--ink);font-weight:500;overflow-wrap:break-word;word-break:break-word}
.cm-text p{margin:0 0 8px}
.cm-text pre,.cm-text code{white-space:pre-wrap;word-break:break-word;overflow-wrap:break-word;max-width:100%}
.cm.collapsed .cm-text,.cm.collapsed .cm-kids{display:none}
.cm-toggle{cursor:pointer;color:var(--red);user-select:none;font-weight:800}
.cm-kids{margin-top:12px;padding-left:16px;border-left:2px solid var(--line);
  display:flex;flex-direction:column;gap:12px}
.loading{color:var(--ink);font-style:italic;padding:20px;text-align:center;font-weight:600}

/* skeleton shimmer */
.skeleton{display:flex;flex-direction:column;gap:8px;cursor:default;box-shadow:none!important;border-style:dashed!important}
.sk-line{height:12px;background:linear-gradient(90deg,rgba(128,128,128,.18),rgba(128,128,128,.35),rgba(128,128,128,.18));background-size:200% 100%;animation:shimmer 1.1s infinite;margin-bottom:4px}
.sk-bar{height:6px;background:linear-gradient(90deg,rgba(128,128,128,.18),rgba(128,128,128,.35),rgba(128,128,128,.18));background-size:200% 100%;animation:shimmer 1.1s infinite}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* rooms */
.rooms-panel[hidden]{display:none}
.rooms-panel{position:fixed;top:0;right:0;width:min(340px,90vw);height:100vh;background:#fff;
  border-left:3px solid var(--line);padding:18px;overflow-y:auto;z-index:10;box-shadow:-6px 0 0 var(--red)}
.rooms-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}
.rooms-head h2{font-family:"Space Grotesk",sans-serif;font-size:17px;font-weight:800}
.rooms-head button{background:var(--yellow);border:2px solid var(--line);color:var(--ink);font-size:16px;cursor:pointer;width:30px;height:30px;font-weight:800}
.rooms-sub{font-size:12px;color:var(--ink);margin-bottom:14px;font-weight:500}
.rooms-list{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.room-item{display:flex;justify-content:space-between;align-items:center;background:var(--paper);
  border:2px solid var(--line);box-shadow:3px 3px 0 var(--line);padding:10px 12px;font-size:13px;font-weight:600}
.room-item button{background:none;border:none;color:var(--ink);cursor:pointer;font-size:16px;font-weight:800}
.room-new{display:flex;gap:8px}
.room-new input{flex:1;background:#fff;border:2px solid var(--line);border-radius:0;
  padding:8px 10px;color:var(--ink);font-family:inherit;font-size:13px;font-weight:500}
.room-new button{background:var(--red);color:#fff;border:2px solid var(--line);box-shadow:2px 2px 0 var(--line);border-radius:0;padding:8px 14px;font-weight:800;cursor:pointer}

/* theme toggle */
.theme-btn{width:auto;padding:0 12px;height:32px;border-radius:0;border:2px solid var(--line);
  background:var(--yellow);color:var(--ink);font-size:13px;cursor:pointer;font-weight:800;
  font-family:"Inter",sans-serif;display:flex;align-items:center;gap:5px}
.theme-btn:hover{box-shadow:2px 2px 0 var(--line)}
.theme-btn:active{transform:translate(2px,2px);box-shadow:0 0 0}

/* theme morph */
.theme-morph{position:fixed;inset:0;z-index:50;pointer-events:none;
  background:var(--ink);opacity:0;visibility:hidden}
.theme-morph.run{visibility:visible;opacity:1;
  clip-path:circle(0% at var(--mx,90%) var(--my,5%));
  transition:clip-path .55s cubic-bezier(.7,0,.3,1)}
.theme-morph.run.go{clip-path:circle(150% at var(--mx,90%) var(--my,5%))}

/* ===== DARK theme (brutalist dark — yellow/white/black identity) ===== */
[data-theme="dark"]{
  --paper:#0E0E12;
  --ink:#F2F2F0;
  --red:#FF5C3D;
  --yellow:#FFE600;
  --line:rgba(255,255,255,0.16);
}
[data-theme="dark"] body{background:var(--paper);color:var(--ink)}
[data-theme="dark"] .feed,
[data-theme="dark"] .reader,
[data-theme="dark"] .fitem,
[data-theme="dark"] .tab,
[data-theme="dark"] .save-btn,
[data-theme="dark"] .summary-btn,
[data-theme="dark"] .modal-box,
[data-theme="dark"] .room-item,
[data-theme="dark"] .room-new input,
[data-theme="dark"] .rooms-head button,
[data-theme="dark"] .help-btn{background:#15151B;border-color:var(--line);color:var(--ink)}
[data-theme="dark"] .feed,
[data-theme="dark"] .reader{box-shadow:6px 6px 0 #000}
[data-theme="dark"] .fitem{box-shadow:3px 3px 0 #000}
[data-theme="dark"] .feed-tabs,
[data-theme="dark"] .onboard,
[data-theme="dark"] .velobar,
[data-theme="dark"] .rooms-panel{background:#15151B}
[data-theme="dark"] .onboard{background:#1B1B22}
/* links stay on-brand: red, not browser blue */
[data-theme="dark"] .story-link{color:var(--red)}
[data-theme="dark"] .cm-text a{color:var(--red);text-decoration:underline}
[data-theme="dark"] .fvelo-bar,
[data-theme="dark"] .velo-track{background:#2A2A32}
[data-theme="dark"] .summary-box{background:#17171E}
[data-theme="dark"] .cm-text{border-color:var(--line)}
[data-theme="dark"] .modal{background:rgba(0,0,0,.78)}
[data-theme="dark"] .help-btn{background:var(--yellow);color:#0E0E12}
[data-theme="dark"] .room-new button{background:var(--red);color:#fff}
[data-theme="dark"] .tab:hover{background:#23232B}
[data-theme="dark"] .tab.active{background:var(--red);color:#fff}
[data-theme="dark"] .fitem.active{background:#23232B}
[data-theme="dark"] .hot-badge{background:var(--yellow);color:#0E0E12}
[data-theme="dark"] .loading{color:var(--ink)}

/* modal */
.modal[hidden]{display:none}
.modal{position:fixed;inset:0;background:rgba(17,17,17,.5);display:flex;align-items:center;justify-content:center;z-index:20}
.modal-box{background:#fff;border:3px solid var(--line);box-shadow:8px 8px 0 var(--red);
  border-radius:0;padding:24px;max-width:440px;width:90%}
.modal-box h2{font-family:"Space Grotesk",sans-serif;margin-bottom:14px;font-weight:800}
.modal-box ul{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:14px;margin-bottom:18px;font-weight:500}
.modal-box li{padding-left:14px;border-left:3px solid var(--red);color:var(--ink);font-weight:600}
.modal-box b{color:var(--red)}
.modal-box button{background:var(--yellow);color:var(--ink);border:2px solid var(--line);box-shadow:3px 3px 0 var(--line);border-radius:0;padding:8px 16px;font-weight:800;cursor:pointer}
.modal-box button:active{transform:translate(2px,2px);box-shadow:0 0 0}
.footer{text-align:center;font-size:11px;color:var(--ink);font-family:"JetBrains Mono",monospace;padding-top:4px;font-weight:600}

/* ===== MOBILE: tap story → full-screen reader + back arrow ===== */
.reader-back{display:none}
@media (max-width: 820px) {
  body{padding:10px}
  .shell{gap:10px}
  .name{font-size:18px}
  .tag{display:none}
  .layout{grid-template-columns:1fr}
  .feed{max-height:none;border-width:2px}
  .tab{font-size:12px;padding:7px 11px}
  .fitem{padding:14px;margin-bottom:8px}
  .ftitle{font-size:15px}

  /* only the OPEN reader takes over the screen */
  .reader.open{position:fixed;inset:0;z-index:40;max-height:none;height:100dvh;
    border-width:0;box-shadow:none;border-radius:0;
    padding:64px 16px calc(72px + env(safe-area-inset-bottom));
    overflow-y:auto;animation:slideup .26s cubic-bezier(.2,.8,.2,1);background:var(--paper)}

  /* FIXED back bar — always visible, never depends on scroll */
  .reader-back{display:none}
  .reader.open .reader-back{display:inline-block;position:fixed;top:calc(10px + env(safe-area-inset-top));
    left:10px;right:auto;z-index:60;background:var(--yellow);border:2px solid var(--line);
    box-shadow:2px 2px 0 var(--line);color:var(--ink);font-weight:800;font-size:13px;
    padding:9px 14px;cursor:pointer}
  .reader.open .reader-back:active{transform:translate(2px,2px);box-shadow:0 0 0}

  /* FIXED bottom back tab — second guarantee */
  .reader-back-tab{display:none}
  .reader.open ~ .reader-back-tab,
  body.has-open-reader .reader-back-tab{display:flex}
  .reader-back-tab{position:fixed;left:0;right:0;bottom:0;z-index:60;
    height:calc(54px + env(safe-area-inset-bottom));align-items:center;justify-content:center;
    gap:8px;background:var(--yellow);border-top:3px solid var(--line);color:#0E0E12;
    font-weight:800;font-size:15px;cursor:pointer;box-shadow:0 -3px 0 rgba(0,0,0,.25)}

  .reader .story-title{font-size:25px}
  .save-btn,.summary-btn{height:42px;font-size:15px}
  .summary-btn{width:100%}
  .rooms-panel{width:100vw;box-shadow:none}
}