/* Signal Exchange — Unified Feed revamp (2026-08-12)
   Full-screen multi-source media feed with one active player at a time. */

:root{
  color-scheme:dark;
  --bg:#050505;
  --surface:#101114;
  --surface2:#17191d;
  --text:#fff;
  --muted:rgba(255,255,255,.68);
  --line:rgba(255,255,255,.14);
  --glass:rgba(8,8,10,.56);
  --glass-strong:rgba(8,8,10,.82);
  --accent:#fff;
  --danger:#ff6f7d;
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
  --top-h:64px;
  --nav-h:72px;
  --content-max:760px;
}
body.light{
  color-scheme:light;
  --bg:#f5f6f8;
  --surface:#fff;
  --surface2:#f0f1f3;
  --text:#111317;
  --muted:rgba(17,19,23,.66);
  --line:rgba(17,19,23,.14);
  --glass:rgba(255,255,255,.62);
  --glass-strong:rgba(255,255,255,.88);
}

*{box-sizing:border-box}
html,body{height:100%;width:100%}
html{background:var(--bg)}
body{
  margin:0;
  overflow:hidden;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
button,input,textarea,select{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{color:inherit}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}

/* Fixed shell ------------------------------------------------------------- */
.tt-top{
  position:fixed;
  z-index:80;
  top:0;left:0;right:0;
  height:calc(var(--top-h) + var(--safe-top));
  padding:calc(10px + var(--safe-top)) 12px 10px;
  display:flex;
  align-items:center;
  gap:10px;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,.68),rgba(0,0,0,.18) 65%,transparent);
}
.tt-top>*{pointer-events:auto}
.tt-brand{
  flex:0 0 auto;
  font-weight:950;
  letter-spacing:-.03em;
  text-shadow:0 2px 18px rgba(0,0,0,.5);
}
.tt-pill{
  flex:0 0 auto;
  font-size:11px;
  font-weight:800;
  letter-spacing:.04em;
  text-transform:uppercase;
  padding:5px 9px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.2);
  background:rgba(0,0,0,.28);
  backdrop-filter:blur(14px);
}
.tt-top-right{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:7px;
  max-width:min(66vw,760px);
  overflow-x:auto;
  scrollbar-width:none;
}
.tt-top-right::-webkit-scrollbar{display:none}
.tt-link,.tt-btn,.btn{
  border:1px solid var(--line);
  background:var(--glass);
  color:inherit;
  border-radius:999px;
  padding:8px 11px;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  backdrop-filter:blur(14px);
  transition:transform .15s ease,background .15s ease,border-color .15s ease,opacity .15s ease;
}
.tt-link:hover,.tt-btn:hover,.btn:hover{background:rgba(127,127,127,.18)}
.tt-link:active,.tt-btn:active,.btn:active{transform:scale(.97)}
.tt-btn{appearance:none}
.btn.primary{
  background:#fff;
  border-color:#fff;
  color:#08090b;
  font-weight:800;
}
body.light .btn.primary{background:#111317;border-color:#111317;color:#fff}
.btn:disabled,.tt-btn:disabled{opacity:.55;cursor:wait}

.tt-nav{
  position:fixed;
  z-index:90;
  left:0;right:0;bottom:0;
  min-height:calc(var(--nav-h) + var(--safe-bottom));
  padding-bottom:var(--safe-bottom);
  display:grid;
  grid-template-columns:repeat(3,1fr);
  background:linear-gradient(0deg,rgba(0,0,0,.94),rgba(0,0,0,.76));
  border-top:1px solid rgba(255,255,255,.1);
  backdrop-filter:blur(18px);
}
.tt-navbtn{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:var(--nav-h);
  font-size:14px;
  font-weight:800;
  color:rgba(255,255,255,.68);
  position:relative;
}
.tt-navbtn.active{color:#fff}
.tt-navbtn.active::after{
  content:"";
  position:absolute;
  bottom:12px;
  width:24px;height:2px;border-radius:2px;
  background:#fff;
}

.tt-view{
  position:fixed;
  inset:0;
  overflow-y:auto;
  overflow-x:hidden;
  overscroll-behavior-y:contain;
  scroll-snap-type:y mandatory;
  scrollbar-width:none;
  background:#000;
}
.tt-view::-webkit-scrollbar{display:none}

/* Feed reels -------------------------------------------------------------- */
.reel{
  position:relative;
  width:100%;
  height:100vh;
  height:100dvh;
  min-height:560px;
  overflow:hidden;
  scroll-snap-align:start;
  scroll-snap-stop:always;
  background:#050505;
  isolation:isolate;
  display:grid;
  place-items:center;
}
.reel::before{
  content:"";
  position:absolute;
  inset:-6%;
  z-index:-2;
  background-image:var(--bg);
  background-size:cover;
  background-position:center;
  filter:blur(32px) saturate(1.12) brightness(.62);
  transform:scale(1.08);
  pointer-events:none;
}
.reel::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:
    linear-gradient(90deg,rgba(0,0,0,.32),transparent 30%,transparent 70%,rgba(0,0,0,.32)),
    linear-gradient(0deg,rgba(0,0,0,.62),transparent 35%,rgba(0,0,0,.16) 78%,rgba(0,0,0,.42));
  pointer-events:none;
}
.reel-inner{
  position:relative;
  height:100%;
  width:min(100vw,calc(100dvh * .5625));
  max-width:620px;
  overflow:hidden;
  background:#060606;
  border-left:1px solid rgba(255,255,255,.08);
  border-right:1px solid rgba(255,255,255,.08);
  box-shadow:0 0 70px rgba(0,0,0,.48);
}
.reel-media{
  position:absolute;
  inset:0;
  overflow:hidden;
  background:#000;
}
.reel-thumb{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  display:block;
  transition:opacity .2s ease,filter .2s ease,transform .45s ease;
}
.reel.media-active .reel-thumb{opacity:.08;filter:blur(6px);transform:scale(1.03)}
.reel-player{
  position:absolute;
  inset:0;
  z-index:2;
  display:grid;
  place-items:center;
  background:transparent;
}
.reel-player:empty{display:none}
.reel-player>iframe,
.reel-player>video,
.reel-player>img{
  width:100%;
  height:100%;
}
.sx-embed-frame{
  display:block;
  width:100%;
  height:100%;
  border:0;
  background:#000;
}
.sx-native-video{
  display:block;
  width:100%;
  height:100%;
  object-fit:contain;
  background:#000;
}
.sx-native-image{
  display:block;
  width:100%;
  height:100%;
  object-fit:contain;
  background:#000;
}
.sx-native-audio{
  width:min(92%,520px);
  height:54px;
  align-self:center;
}
.sx-embed-frame[data-embed="spotify"],
.sx-embed-frame[data-embed="apple_music"]{
  width:94%;
  height:352px;
  border-radius:16px;
  overflow:hidden;
}
.sx-embed-frame[data-embed="soundcloud"]{
  width:94%;
  height:min(62vh,520px);
  border-radius:16px;
}
.sx-embed-frame[data-embed="x"]{
  width:min(100%,550px);
  height:78%;
  align-self:center;
  background:transparent;
}

.reel-play{
  position:absolute;
  z-index:8;
  top:50%;left:50%;
  transform:translate(-50%,-50%);
  min-width:84px;
  min-height:84px;
  border:1px solid rgba(255,255,255,.24);
  border-radius:999px;
  background:rgba(0,0,0,.42);
  color:#fff;
  display:grid;
  place-items:center;
  gap:2px;
  padding:14px 18px;
  cursor:pointer;
  backdrop-filter:blur(18px);
  box-shadow:0 12px 40px rgba(0,0,0,.3);
}
.reel-play:hover{background:rgba(0,0,0,.62);transform:translate(-50%,-50%) scale(1.04)}
.reel-play:active{transform:translate(-50%,-50%) scale(.98)}
.reel-play-icon{font-size:27px;line-height:1;margin-left:3px}
.reel-play-label{font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.08em}

.reel-source{
  position:absolute;
  z-index:9;
  top:calc(var(--top-h) + var(--safe-top) + 6px);
  left:12px;
  display:flex;
  gap:6px;
  align-items:center;
  pointer-events:none;
}
.source-provider,.source-kind,.tt-chip{
  display:inline-flex;
  align-items:center;
  min-height:27px;
  padding:5px 9px;
  border-radius:999px;
  font-size:10px;
  font-weight:900;
  letter-spacing:.05em;
  text-transform:uppercase;
  color:#fff;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(0,0,0,.42);
  backdrop-filter:blur(14px);
}
.source-kind{color:rgba(255,255,255,.68)}
.tt-chip{
  position:absolute;
  z-index:11;
  top:calc(var(--top-h) + var(--safe-top) + 42px);
  left:12px;
  background:rgba(255,255,255,.92);
  color:#090a0c;
  border-color:transparent;
}

.reel-meta{
  position:absolute;
  z-index:10;
  left:0;
  right:76px;
  bottom:calc(var(--nav-h) + var(--safe-bottom) + 14px);
  border:0;
  background:linear-gradient(90deg,rgba(0,0,0,.3),transparent);
  color:#fff;
  padding:16px 18px 18px 14px;
  text-align:left;
  display:grid;
  gap:4px;
  cursor:pointer;
  text-shadow:0 2px 12px rgba(0,0,0,.78);
}
.reel-title{font-size:17px;font-weight:950;line-height:1.2}
.reel-sub{font-size:13px;font-weight:700;color:rgba(255,255,255,.86)}
.reel-caption{
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-top:2px;
  font-size:12px;
  line-height:1.35;
  color:rgba(255,255,255,.78);
}

.reel-actions{
  position:absolute;
  z-index:12;
  right:10px;
  bottom:calc(var(--nav-h) + var(--safe-bottom) + 16px);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
}
.actbtn{
  width:50px;height:50px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(0,0,0,.32);
  color:#fff;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:1px;
  cursor:pointer;
  backdrop-filter:blur(14px);
  box-shadow:0 5px 18px rgba(0,0,0,.18);
}
.actbtn:hover{background:rgba(0,0,0,.55)}
.actbtn.on{background:rgba(255,255,255,.94);color:#090a0c;border-color:#fff}
.actbtn.busy{opacity:.55;cursor:progress}
.actcount{font-size:10px;font-weight:800}
@keyframes sxBurst{0%{transform:scale(1)}40%{transform:scale(1.22)}100%{transform:scale(1)}}
.actbtn.burst{animation:sxBurst .28s ease}

.reel.media-loading .reel-player::after{
  content:"Loading…";
  position:absolute;
  inset:auto auto 24px 50%;
  transform:translateX(-50%);
  z-index:20;
  padding:7px 10px;
  border-radius:999px;
  font-size:11px;
  background:rgba(0,0,0,.6);
  color:#fff;
}

/* Safe inline fallback ---------------------------------------------------- */
.sx-media-fallback{
  width:min(88%,420px);
  padding:18px;
  border-radius:20px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(12,12,14,.84);
  color:#fff;
  text-align:center;
  box-shadow:0 16px 48px rgba(0,0,0,.35);
}
.sx-media-fallback p{margin:0 0 12px;color:rgba(255,255,255,.72);line-height:1.4}
.sx-open-original{
  display:inline-flex;
  padding:10px 14px;
  border-radius:999px;
  background:#fff;
  color:#0a0a0c;
  font-weight:900;
}

/* Pages / forms ---------------------------------------------------------- */
.sheet,.tt-page{
  min-height:100vh;
  min-height:100dvh;
  width:min(100%,var(--content-max));
  margin:0 auto;
  padding:calc(var(--top-h) + var(--safe-top) + 22px) 14px calc(var(--nav-h) + var(--safe-bottom) + 28px);
  display:grid;
  align-content:start;
  gap:12px;
  background:var(--bg);
}
.card,.tt-card{
  border:1px solid var(--line);
  border-radius:20px;
  padding:16px;
  background:var(--surface);
  color:var(--text);
  box-shadow:0 10px 30px rgba(0,0,0,.08);
}
.hero-card{padding:18px}
.h,.tt-h{margin:0;font-size:20px;line-height:1.2;font-weight:950;letter-spacing:-.025em}
.muted,.tt-muted{color:var(--muted)}
.tiny{font-size:11px;line-height:1.4}
.tt-strong{font-weight:900}
.row,.tt-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tt-spread{justify-content:space-between}
.field{display:grid;gap:8px}
.field label{margin-top:6px;font-size:12px;font-weight:800;color:var(--muted)}
input,textarea,select,.tt-select{
  width:100%;
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--surface2);
  color:var(--text);
  padding:11px 12px;
  outline:none;
}
input:focus,textarea:focus,select:focus,.tt-select:focus{
  border-color:rgba(127,127,127,.5);
  box-shadow:0 0 0 3px rgba(127,127,127,.12);
}
textarea{min-height:120px;resize:vertical}
option{background:var(--surface);color:var(--text)}
.tt-list{display:grid;gap:8px}
.tt-item{
  padding:12px;
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--surface2);
}

.media-detect{
  min-height:40px;
  border:1px solid var(--line);
  border-radius:13px;
  padding:9px 11px;
  display:flex;
  align-items:center;
  gap:9px;
  color:var(--muted);
  font-size:12px;
}
.detect-dot{width:8px;height:8px;border-radius:50%;background:#777;flex:0 0 auto}
.media-detect.good .detect-dot{background:#63d39f}
.media-detect.warn .detect-dot{background:#f2c35c}
.media-detect.bad .detect-dot{background:#ff7180}

.settings-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
  margin-top:16px;
}
.setting-block,.setting-toggle{
  border:1px solid var(--line);
  border-radius:16px;
  padding:12px;
  background:var(--surface2);
}
.setting-block{display:grid;gap:8px;font-size:12px;font-weight:800}
.setting-toggle{
  display:flex;
  gap:10px;
  align-items:flex-start;
  cursor:pointer;
}
.setting-toggle input{width:18px;height:18px;margin:2px 0 0;flex:0 0 auto}
.setting-toggle span{display:grid;gap:3px}
.setting-toggle b{font-size:13px}
.setting-toggle small{color:var(--muted);line-height:1.35}

/* Detail media ----------------------------------------------------------- */
.sx-detail-shell{display:grid;gap:0}
.sx-detail-head{
  display:flex;
  justify-content:space-between;
  gap:10px;
  padding:9px 11px;
  border:1px solid var(--line);
  border-bottom:0;
  border-radius:16px 16px 0 0;
  background:var(--surface2);
  font-size:10px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.06em;
  color:var(--muted);
}
.sx-detail-media{
  width:100%;
  min-height:420px;
  max-height:72vh;
  aspect-ratio:9/16;
  margin:0 auto;
  border:1px solid var(--line);
  border-radius:0 0 16px 16px;
  overflow:hidden;
  display:grid;
  place-items:center;
  background:#000;
}
.sx-detail-media .sx-embed-frame,
.sx-detail-media .sx-native-video,
.sx-detail-media .sx-native-image{width:100%;height:100%}

/* Toasts and action sheets ---------------------------------------------- */
.tt-toast{
  position:fixed;
  z-index:150;
  left:12px;
  right:12px;
  bottom:calc(var(--nav-h) + var(--safe-bottom) + 12px);
  display:grid;
  gap:8px;
  pointer-events:none;
}
.toast{
  justify-self:center;
  width:min(100%,520px);
  padding:11px 13px;
  border-radius:14px;
  border:1px solid var(--line);
  background:var(--glass-strong);
  color:var(--text);
  backdrop-filter:blur(18px);
  box-shadow:0 12px 32px rgba(0,0,0,.22);
}
.toast.bad{border-color:rgba(255,111,125,.45)}

.tt-backdrop{
  position:fixed;
  inset:0;
  z-index:220;
  padding:12px;
  padding-bottom:calc(12px + var(--safe-bottom));
  background:rgba(0,0,0,.62);
  display:flex;
  align-items:flex-end;
  justify-content:center;
  backdrop-filter:blur(5px);
}
.tt-sheet{
  width:min(100%,520px);
  max-height:82vh;
  overflow:auto;
  border:1px solid var(--line);
  border-radius:20px;
  background:var(--surface);
  color:var(--text);
  box-shadow:0 20px 60px rgba(0,0,0,.45);
}
.tt-sheet-hd{
  position:sticky;top:0;
  display:flex;align-items:center;justify-content:space-between;
  gap:10px;padding:12px;
  border-bottom:1px solid var(--line);
  background:var(--surface);
}
.tt-sheet-title{font-weight:950}
.tt-sheet-bd{padding:10px;display:grid;gap:8px}
.tt-sheet-act{
  width:100%;
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  background:var(--surface2);
  color:var(--text);
  text-align:left;
  cursor:pointer;
}
.tt-sheet-act .sub{display:block;margin-top:3px;font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis}
.tt-sheet-act.danger{border-color:rgba(255,111,125,.4);color:var(--danger)}

/* Legacy modal (kept for compatibility) -------------------------------- */
.player-open{overflow:hidden}
.player-modal{
  position:fixed;
  inset:0;
  z-index:300;
  opacity:0;
  pointer-events:none;
  display:grid;
  place-items:center;
  transition:opacity .16s ease;
}
.player-modal.show{opacity:1;pointer-events:auto}
.player-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.72);backdrop-filter:blur(7px)}
.player-sheet{
  position:relative;
  width:min(92vw,760px);
  max-height:92vh;
  overflow:auto;
  border:1px solid var(--line);
  border-radius:20px;
  padding:14px;
  background:var(--surface);
  box-shadow:0 18px 60px rgba(0,0,0,.5);
}
.player-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.player-title{font-weight:950}
.player-sub{margin-top:4px}

/* Responsive ------------------------------------------------------------- */
@media (max-width:760px){
  :root{--top-h:58px;--nav-h:64px}
  .tt-pill{display:none}
  .tt-top{padding-left:8px;padding-right:8px}
  .tt-top-right{max-width:68vw;gap:5px}
  .tt-link,.tt-btn{padding:7px 9px;font-size:12px}
  .reel-inner{
    width:100vw;
    max-width:none;
    border:0;
    box-shadow:none;
  }
  .reel-source{left:10px}
  .reel-meta{left:0;right:66px;padding-left:12px;padding-bottom:13px}
  .reel-actions{right:8px;gap:7px}
  .actbtn{width:46px;height:46px}
  .settings-grid{grid-template-columns:1fr}
  .sx-detail-media{min-height:360px}
}
@media (max-height:700px){
  :root{--nav-h:58px}
  .reel-actions{gap:5px}
  .actbtn{width:42px;height:42px}
  .reel-title{font-size:15px}
  .reel-caption{display:none}
}
@media (min-width:900px){
  .tt-nav{
    left:50%;
    right:auto;
    width:min(620px,100vw);
    transform:translateX(-50%);
    border-left:1px solid rgba(255,255,255,.08);
    border-right:1px solid rgba(255,255,255,.08);
  }
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;animation:none!important;transition:none!important}
}