/* DC34 — DEF CON 34 pocket guide.
   Mobile-first: bottom tabs + bottom sheet. At >=860px the tab bar becomes a left rail,
   search becomes a command palette, and >=1200px docks the detail as a second column. */

:root{
  --bg:#0b0e14; --surface:#141922; --surface-2:#1b2230; --surface-3:#222b3a;
  --line:#232b39; --line-2:#313c4e;
  --ink:#e8eef6; --ink-2:#9dabbe; --ink-3:#6d7c92;
  --accent:#ff3b5c; --accent-soft:#33141d;
  --must:#ff3b5c; --like:#5fa8ff;
  --live:#25d3a4; --live-soft:#0d2b25;
  --soon:#f5a623; --soon-soft:#2e2312;
  --k-talk:#5fa8ff; --k-creator:#a78bfa; --k-demolab:#25d3a4; --k-village:#f5a623;
  --k-contest:#ff3b5c; --k-event:#f472b6; --k-community:#38bdf8; --k-vendor:#8ea0b8;
  --k-exhibitor:#8ea0b8; --k-info:#8ea0b8;
  --r:14px; --r-sm:10px; --r-lg:20px;
  --tap:44px;
  --sat:env(safe-area-inset-top); --sab:env(safe-area-inset-bottom);
  --sal:env(safe-area-inset-left); --sar:env(safe-area-inset-right);
  --top-h:56px; --tab-h:60px; --rail-w:0px;
  --ff:'Hanken Grotesk',system-ui,-apple-system,'Segoe UI',sans-serif;
  --fm:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
/* several components set an explicit display, which would otherwise beat [hidden] */
[hidden]{display:none!important}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--ink);
  font:400 15px/1.5 var(--ff);
  overscroll-behavior-y:none;
  -webkit-font-smoothing:antialiased;
  padding-left:var(--sal); padding-right:var(--sar);
}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer;-webkit-tap-highlight-color:transparent}
a{color:var(--k-talk);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--k-talk);outline-offset:2px;border-radius:6px}
.ic{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;
    stroke-linecap:round;stroke-linejoin:round}
.scroll-x{overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.scroll-x::-webkit-scrollbar{display:none}
.mono{font-family:var(--fm);font-variant-numeric:tabular-nums}

/* ------------------------------------------------------------------ top bar */
.top{
  position:fixed;inset:0 0 auto 0;z-index:40;
  padding-top:var(--sat);
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(1.6) blur(14px);
  border-bottom:1px solid var(--line);
}
.top-in{height:var(--top-h);display:flex;align-items:center;gap:10px;
  padding:0 12px;max-width:1400px;margin:0 auto}
.brand{display:flex;align-items:baseline;gap:1px;font-weight:800;font-size:19px;
  letter-spacing:-.02em;padding:6px 4px;border-radius:8px}
.brand-m{color:var(--ink)}
.brand-n{color:var(--accent)}
.clock{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;line-height:1.15}
.clock-t{font-family:var(--fm);font-size:15px;font-weight:600;font-variant-numeric:tabular-nums}
.clock-d{font-size:10.5px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.07em}
.icon-btn{width:var(--tap);height:var(--tap);display:grid;place-items:center;
  border-radius:11px;color:var(--ink-2)}
.icon-btn:hover{background:var(--surface-2);color:var(--ink)}
/* A toast, not part of the header: an offline banner that changed the header's height
   would push the whole app down the moment the con wifi drops. */
.offline-bar{position:fixed;z-index:50;left:50%;transform:translateX(-50%);
  bottom:calc(var(--tab-h) + var(--sab) + 10px);
  display:flex;align-items:center;justify-content:center;gap:7px;
  padding:7px 13px;font-size:12.5px;font-weight:600;border-radius:10px;
  background:var(--soon-soft);color:var(--soon);border:1px solid var(--soon);
  box-shadow:0 6px 20px -6px rgba(0,0,0,.7);white-space:nowrap}
.offline-bar .ic{width:15px;height:15px}
@media (min-width:860px){
  .offline-bar{bottom:16px;left:calc(var(--rail-w) + 16px);transform:none}
}

/* ------------------------------------------------------------------ layout */
#main{
  padding-top:calc(var(--top-h) + var(--sat));
  padding-bottom:calc(var(--tab-h) + var(--sab) + 12px);
  padding-left:var(--rail-w);
  min-height:100vh;
}
.view{max-width:760px;margin:0 auto;padding:14px 12px 28px}
.view[hidden]{display:none}

/* ------------------------------------------------------------------ tab bar */
.tabs{
  position:fixed;inset:auto 0 0 0;z-index:40;display:grid;
  grid-template-columns:repeat(4,1fr);
  padding-bottom:var(--sab);
  background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:saturate(1.6) blur(14px);
  border-top:1px solid var(--line);
}
.tabs button{
  height:var(--tab-h);display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:3px;color:var(--ink-3);font-size:10.5px;font-weight:600;
  letter-spacing:.02em;position:relative;
}
.tabs button[aria-selected=true]{color:var(--ink)}
.tabs button[aria-selected=true] .ic{color:var(--accent)}
.tabs .badge{position:absolute;top:8px;left:calc(50% + 8px);min-width:16px;height:16px;
  border-radius:8px;background:var(--accent);color:#fff;font-size:10px;font-weight:700;
  display:grid;place-items:center;padding:0 4px;font-style:normal}

/* ------------------------------------------------------------------ headings */
.h{display:flex;align-items:baseline;gap:9px;margin:22px 2px 10px}
.h:first-child{margin-top:4px}
.h h2{margin:0;font-size:13px;font-weight:700;text-transform:uppercase;
  letter-spacing:.1em;color:var(--ink-2)}
.h .n{font-family:var(--fm);font-size:11.5px;color:var(--ink-3)}
.h .dot{width:7px;height:7px;border-radius:50%;flex:none;transform:translateY(-1px)}
.h .dot.live{background:var(--live);box-shadow:0 0 0 4px var(--live-soft);
  animation:pulse 2.4s ease-in-out infinite}
.h .dot.soon{background:var(--soon);box-shadow:0 0 0 4px var(--soon-soft)}
@keyframes pulse{50%{opacity:.35}}
@media (prefers-reduced-motion:reduce){.h .dot.live{animation:none}}

.hero{padding:2px 2px 6px}
.hero h1{margin:0 0 4px;font-size:23px;font-weight:800;letter-spacing:-.02em}
.hero p{margin:0;color:var(--ink-2);font-size:13.5px}
.hero .thin{color:var(--ink-3)}

/* ------------------------------------------------------------------ cards */
.card{
  display:block;width:100%;text-align:left;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:12px 13px;margin-bottom:8px;position:relative;
  transition:border-color .12s,background .12s,transform .08s;
}
.card:hover{border-color:var(--line-2);background:var(--surface-2)}
.card:active{transform:scale(.994)}
.card.on{border-left:3px solid var(--live);padding-left:12px}
.card.next{border-left:3px solid var(--soon);padding-left:12px}
.card-top{display:flex;align-items:center;gap:8px;margin-bottom:5px;flex-wrap:wrap}
.card h3{margin:0 0 3px;font-size:15.5px;font-weight:650;line-height:1.32;letter-spacing:-.01em}
.card .sub{display:flex;align-items:center;gap:5px;color:var(--ink-2);font-size:13px;
  margin-top:3px;line-height:1.35}
.card .sub .ic{width:14px;height:14px;color:var(--ink-3)}
.card .meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:8px}
.card h3{padding-right:34px}

/* ---- two-tier favourites: must-do must read louder than nice-to-have ---- */
.card .fav{position:absolute;top:6px;right:6px;width:38px;height:38px;display:grid;
  place-items:center;border-radius:10px;color:var(--ink-3)}
.card .fav .ic{width:18px;height:18px}
.card .fav:hover{color:var(--ink-2);background:var(--surface-3)}
.card .fav[data-tier=must]{color:var(--must)}
.card .fav[data-tier=must] .ic{fill:var(--must);stroke:var(--must)}
.card .fav[data-tier=like]{color:var(--like)}
.card .fav[data-tier=like] .ic{fill:var(--like);stroke:var(--like)}
/* a saved card is tinted down its leading edge; "on/next" state still wins */
.card[data-tier=must]{border-color:color-mix(in srgb,var(--must) 42%,var(--line))}
.card[data-tier=like]{border-color:color-mix(in srgb,var(--like) 34%,var(--line))}
.card[data-tier=must]::before,.card[data-tier=like]::before{
  content:'';position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0}
.card[data-tier=must]::before{background:var(--must)}
.card[data-tier=like]::before{background:var(--like)}
.card.on[data-tier]::before,.card.next[data-tier]::before{display:none}
.card.on[data-tier=must],.card.next[data-tier=must]{box-shadow:inset 3px 0 0 0 var(--must)}
.card.on[data-tier=like],.card.next[data-tier=like]{box-shadow:inset 3px 0 0 0 var(--like)}

.chips button.t-must[aria-pressed=true]{background:var(--must);border-color:var(--must);color:#2a0710}
.chips button.t-like[aria-pressed=true]{background:var(--like);border-color:var(--like);color:#04121f}
.btn.tier.on.t-must{background:var(--must);border-color:var(--must);color:#2a0710}
.btn.tier.on.t-like{background:var(--like);border-color:var(--like);color:#04121f}
.btn.tier.on .ic{fill:currentColor}
.tabs .badge.must{background:var(--must)}
.tabs .badge.like{background:var(--like)}
.chip.soft{background:transparent;border-color:var(--line-2);color:var(--ink-3);
  font-family:var(--fm);font-size:10.5px;letter-spacing:-.01em}

.time{font-family:var(--fm);font-size:12.5px;font-weight:600;font-variant-numeric:tabular-nums;
  color:var(--ink);letter-spacing:-.02em}
.time .to{color:var(--ink-3);font-weight:400}
.rel{font-size:11.5px;font-weight:700;letter-spacing:.03em;text-transform:uppercase}
.rel.live{color:var(--live)}
.rel.soon{color:var(--soon)}
.rel.past{color:var(--ink-3)}

.chip{display:inline-flex;align-items:center;gap:5px;height:23px;padding:0 8px;
  border-radius:7px;font-size:11.5px;font-weight:600;letter-spacing:.01em;
  background:var(--surface-2);color:var(--ink-2);border:1px solid transparent;white-space:nowrap}
.chip .ic{width:13px;height:13px}
.chip.kind{color:var(--kc,var(--ink-2));background:color-mix(in srgb,var(--kc,#888) 14%,transparent);
  border-color:color-mix(in srgb,var(--kc,#888) 26%,transparent)}
.chip.loc{font-family:var(--fm);font-size:11px}
.chip.tag{background:transparent;border-color:var(--line-2);color:var(--ink-3)}

/* filter chip row */
.chips{display:flex;gap:7px;padding:4px 2px 10px;flex-wrap:nowrap}
.chips.wrap{flex-wrap:wrap}
.chips button{height:32px;padding:0 12px;border-radius:9px;background:var(--surface);
  border:1px solid var(--line);color:var(--ink-2);font-size:13px;font-weight:600;white-space:nowrap}
.chips button[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.chips button .c{opacity:.55;font-family:var(--fm);font-size:11px;margin-left:5px}

/* day switcher */
.days{display:grid;grid-auto-flow:column;gap:6px;background:var(--surface);
  border:1px solid var(--line);border-radius:12px;padding:4px;margin:2px 0 12px}
.days button{height:38px;border-radius:9px;font-size:13px;font-weight:650;color:var(--ink-2);
  display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1}
.days button small{font-family:var(--fm);font-size:10px;color:var(--ink-3);font-weight:500}
.days button[aria-pressed=true]{background:var(--surface-3);color:var(--ink)}
.days button[aria-pressed=true] small{color:var(--ink-2)}
.days button.today::after{content:'';width:4px;height:4px;border-radius:50%;
  background:var(--accent);margin-top:2px}

/* time rail in the schedule */
.slot{margin:16px 0 4px;display:flex;align-items:center;gap:9px}
.slot .t{font-family:var(--fm);font-size:12.5px;font-weight:700;color:var(--ink);
  background:var(--surface-2);border:1px solid var(--line);padding:3px 8px;border-radius:7px}
.slot .ln{flex:1;height:1px;background:var(--line)}
.slot.is-now .t{background:var(--live-soft);border-color:var(--live);color:var(--live)}

/* ------------------------------------------------------------------ empty / misc */
.empty{text-align:center;padding:34px 18px;color:var(--ink-3);font-size:14px}
.empty strong{display:block;color:var(--ink-2);font-size:15px;margin-bottom:5px;font-weight:600}
.note{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:11px 13px;color:var(--ink-2);font-size:13.5px;margin-bottom:10px}
.note b{color:var(--ink)}
.more{display:block;width:100%;padding:11px;border:1px dashed var(--line-2);border-radius:var(--r);
  color:var(--ink-2);font-size:13.5px;font-weight:600;margin-top:2px}
.more:hover{border-color:var(--ink-3);color:var(--ink)}

/* ------------------------------------------------------------------ find/map */
.lvl{margin:18px 0 8px;display:flex;align-items:center;gap:8px}
.lvl h2{margin:0;font-size:15px;font-weight:700}
.lvl .n{font-family:var(--fm);font-size:11.5px;color:var(--ink-3)}
.room{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  margin-bottom:8px;overflow:hidden}
.room > summary{list-style:none;cursor:pointer;padding:11px 13px;display:flex;
  align-items:center;gap:10px}
.room > summary::-webkit-details-marker{display:none}
.room .rm{font-family:var(--fm);font-size:13px;font-weight:700;color:var(--ink);
  background:var(--surface-3);padding:3px 8px;border-radius:7px;min-width:56px;text-align:center}
.room .rl{flex:1;min-width:0;font-size:14px;font-weight:600;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.room .rc{font-family:var(--fm);font-size:11px;color:var(--ink-3)}
.room > summary .ic{width:18px;height:18px;color:var(--ink-3);transition:transform .15s}
.room[open] > summary .ic{transform:rotate(180deg)}
.room .rbody{padding:0 13px 10px;border-top:1px solid var(--line);padding-top:9px}
.room .rrow{display:flex;gap:9px;align-items:baseline;padding:5px 0;font-size:13.5px;
  border-bottom:1px solid var(--line);width:100%;text-align:left}
.room .rrow:last-child{border-bottom:0}
.room .rrow .rt{font-family:var(--fm);font-size:11px;color:var(--ink-3);flex:none;width:62px}
.room .rrow span{color:var(--ink-2);flex:1;min-width:0}
.room .rrow:hover span{color:var(--ink)}

/* ------------------------------------------------------------------ sheet / detail */
.sheet-wrap{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end}
.sheet-wrap[hidden]{display:none}
.scrim{position:absolute;inset:0;background:rgba(4,6,10,.66);
  animation:fade .18s ease-out;backdrop-filter:blur(2px)}
@keyframes fade{from{opacity:0}}
.sheet{
  position:relative;width:100%;max-height:92vh;background:var(--surface);
  border-radius:var(--r-lg) var(--r-lg) 0 0;border-top:1px solid var(--line-2);
  display:flex;flex-direction:column;animation:up .22s cubic-bezier(.2,.9,.3,1);
  padding-bottom:var(--sab);box-shadow:0 -18px 50px -12px rgba(0,0,0,.6);
}
@keyframes up{from{transform:translateY(14px);opacity:.4}}
@media (prefers-reduced-motion:reduce){.sheet,.scrim{animation:none}}
.sheet-grab{width:38px;height:4px;border-radius:2px;background:var(--line-2);
  margin:9px auto 2px;flex:none}
.sheet-x{position:absolute;top:8px;right:6px;z-index:2}
.sheet-body{overflow-y:auto;padding:8px 16px 26px;-webkit-overflow-scrolling:touch}
.sheet-body h2{margin:6px 44px 8px 0;font-size:20px;font-weight:750;line-height:1.25;
  letter-spacing:-.02em}
.dl{display:flex;flex-direction:column;gap:7px;margin:12px 0}
.dl .row{display:flex;gap:9px;align-items:flex-start;font-size:14px}
.dl .row .ic{width:16px;height:16px;color:var(--ink-3);margin-top:2px}
.dl .row b{font-weight:600;color:var(--ink)}
.dl .row span{color:var(--ink-2)}
.sess-row{display:flex;align-items:center;gap:9px;padding:9px 11px;background:var(--surface-2);
  border:1px solid var(--line);border-radius:var(--r-sm);margin-bottom:6px;flex-wrap:wrap}
.sess-row.on{border-color:var(--live)}
.prose{margin-top:14px;color:var(--ink-2);font-size:14.5px;line-height:1.62;
  white-space:pre-wrap;word-wrap:break-word}
.prose.clamped{max-height:15em;overflow:hidden;
  -webkit-mask-image:linear-gradient(#000 70%,transparent);mask-image:linear-gradient(#000 70%,transparent)}
.links{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.links a{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 11px;
  border-radius:9px;background:var(--surface-2);border:1px solid var(--line);
  color:var(--ink-2);font-size:12.5px;font-weight:600;max-width:100%}
.links a:hover{color:var(--ink);border-color:var(--line-2);text-decoration:none}
.links a span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.links a .ic{width:14px;height:14px;flex:none}
.sheet-actions{display:flex;gap:8px;margin-top:16px}
.btn{flex:1;height:44px;border-radius:12px;font-size:14px;font-weight:650;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  background:var(--surface-2);border:1px solid var(--line);color:var(--ink)}
.btn:hover{border-color:var(--line-2);background:var(--surface-3)}
.btn.pri{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.pri.on{background:var(--soon);border-color:var(--soon);color:#241a04}

/* ------------------------------------------------------------------ search */
.search-wrap{position:fixed;inset:0;z-index:70;background:var(--bg);
  display:flex;flex-direction:column;padding-top:var(--sat)}
.search-wrap[hidden]{display:none}
.search-top{display:flex;align-items:center;gap:6px;padding:8px 10px;
  border-bottom:1px solid var(--line);flex:none}
#q{flex:1;height:44px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:0 13px;font-size:16px;min-width:0}
#q:focus{outline:none;border-color:var(--line-2);background:var(--surface-2)}
#q::-webkit-search-cancel-button{display:none}
.search-wrap .chips{padding:9px 10px;border-bottom:1px solid var(--line);flex:none;margin:0}
.search-results{flex:1;overflow-y:auto;padding:10px 12px calc(28px + var(--sab));
  -webkit-overflow-scrolling:touch}
.search-results .view{padding:0}
mark{background:color-mix(in srgb,var(--soon) 26%,transparent);color:var(--ink);
  border-radius:3px;padding:0 1px}
.kbd{display:none;font-family:var(--fm);font-size:11px;color:var(--ink-3);
  border:1px solid var(--line-2);border-radius:5px;padding:2px 5px;margin-left:6px}

/* ------------------------------------------------------------------ boot */
.boot{position:fixed;inset:0;z-index:90;background:var(--bg);display:grid;place-items:center}
.boot[hidden]{display:none}
.boot-in{display:flex;align-items:center;gap:11px;color:var(--ink-3);font-size:14px}
.spin{width:17px;height:17px;border:2px solid var(--line-2);border-top-color:var(--accent);
  border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(1turn)}}

/* ================================================================== desktop */
@media (min-width:860px){
  :root{--rail-w:212px;--top-h:60px}
  .tabs{
    inset:0 auto 0 0;width:var(--rail-w);height:100vh;
    grid-template-columns:1fr;grid-auto-rows:max-content;align-content:start;
    gap:3px;padding:calc(var(--top-h) + var(--sat) + 12px) 10px 12px;
    border-top:0;border-right:1px solid var(--line);background:transparent;backdrop-filter:none;
  }
  .tabs button{height:44px;flex-direction:row;justify-content:flex-start;gap:11px;
    padding:0 12px;border-radius:11px;font-size:14px;font-weight:600}
  .tabs button:hover{background:var(--surface)}
  .tabs button[aria-selected=true]{background:var(--surface-2)}
  .tabs .badge{position:static;margin-left:auto}
  #main{padding-bottom:28px}
  .view{padding:20px 24px 40px}
  .top{border-bottom:1px solid var(--line)}
  .top-in{padding:0 20px}
  .brand{font-size:20px}
  /* command-palette search */
  .search-wrap{inset:0;background:rgba(4,6,10,.6);backdrop-filter:blur(3px);
    display:block;padding:0}
  .search-wrap::before{content:'';position:absolute;inset:0}
  .search-top,.search-wrap .chips,.search-results{
    position:relative;max-width:720px;margin:0 auto;background:var(--surface)}
  .search-top{margin-top:9vh;border-radius:16px 16px 0 0;border:1px solid var(--line);
    border-bottom:1px solid var(--line);padding:10px}
  .search-wrap .chips{border-left:1px solid var(--line);border-right:1px solid var(--line)}
  .search-results{border-radius:0 0 16px 16px;border:1px solid var(--line);border-top:0;
    max-height:64vh;padding:12px}
  #close-search{display:none}
  .kbd{display:inline-block}
  /* detail as a centred dialog */
  .sheet-wrap{align-items:center;justify-content:center;padding:24px}
  .sheet{max-width:640px;max-height:82vh;border-radius:var(--r-lg);
    border:1px solid var(--line-2);animation:pop .18s cubic-bezier(.2,.9,.3,1)}
  @keyframes pop{from{transform:scale(.98);opacity:0}}
  .sheet-grab{display:none}
  .sheet-body{padding:18px 22px 26px}
  .card:active{transform:none}
}
@media (min-width:1200px){
  :root{--rail-w:236px}
  /* keep a readable measure: a full-width card turns a long talk title into one
     very long line that's hard to scan */
  .view{max-width:1040px;padding:20px 28px 40px}
  /* two-column: list keeps a readable measure, detail docks alongside */
  body.has-detail #main{padding-right:var(--dw,440px)}
  body.has-detail .view{max-width:820px;margin:0}
  body.has-detail .sheet-wrap{inset:calc(var(--top-h) + var(--sat)) 0 0 auto;
    width:var(--dw,440px);padding:0;display:block;background:none}
  body.has-detail .scrim{display:none}
  body.has-detail .sheet{max-width:none;width:100%;height:100%;max-height:none;
    border-radius:0;border:0;border-left:1px solid var(--line);animation:slide .2s ease-out;
    box-shadow:none;background:var(--surface)}
  @keyframes slide{from{transform:translateX(16px);opacity:.5}}
  .view.wide{max-width:1100px}
  .grid2{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:8px}
  .grid2 .card{margin-bottom:0}
}
@media (min-width:1500px){
  .view{max-width:1180px;margin:0 auto}
  body.has-detail .view{margin:0 auto}
}