/* tayufun — Material 3 (dark) · completely flat · Android native look */
:root{
  --surface:#141218;
  --surface-low:#1d1b20;
  --surface-container:#211f26;
  --surface-high:#2b2930;
  --surface-highest:#36343b;
  --on-surface:#e6e1e5;
  --on-surface-variant:#cac4d0;
  --outline:#49454f;
  --outline-strong:#938f99;
  --primary:#d0bcff;
  --on-primary:#381e72;
  --primary-container:#4f378b;
  --on-primary-container:#eaddff;
  --secondary-container:#4a4458;
  --on-secondary-container:#e8def8;
  --tertiary:#efb8c8;
  --tertiary-container:#633b48;
  --on-tertiary-container:#ffd8e4;
  --inverse-surface:#e6e1e5;
  --inverse-on-surface:#313033;
  --error:#f2b8b5;
  --radius:16px;
  --radius-lg:28px;
  --ease-out:cubic-bezier(0,0,.2,1);
  --ease-in:cubic-bezier(.4,0,1,1);
  --ease-standard:cubic-bezier(.2,0,0,1);
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{
  font-family:Roboto,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC",sans-serif;
  background:var(--surface);
  color:var(--on-surface);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  padding-bottom:calc(88px + env(safe-area-inset-bottom));
}
::selection{background:var(--primary-container)}

/* ---------- ripple (Material ink) ---------- */
.ripple{position:relative;overflow:hidden;cursor:pointer;-webkit-tap-highlight-color:transparent;user-select:none}
.ripple .ink{
  position:absolute;border-radius:50%;transform:scale(0);pointer-events:none;
  background:currentColor;opacity:.16;
  animation:inkExpand .55s var(--ease-out) forwards}
@keyframes inkExpand{to{transform:scale(1);opacity:0}}
.state{transition:background-color .2s var(--ease-out)}
.state:active{background-color:var(--state-active,rgba(255,255,255,.08))}

/* ---------- top app bar ---------- */
.appbar{
  position:sticky;top:0;z-index:40;background:var(--surface);
  display:flex;align-items:center;gap:12px;padding:10px 16px;
  min-height:60px}
.appbar .appicon{
  width:36px;height:36px;border-radius:10px;
  display:grid;place-items:center;flex-shrink:0}
.appbar .appicon svg{display:block;border-radius:10px;box-shadow:0 2px 8px rgba(109,74,255,.4)}
.appbar .title{font-size:20px;font-weight:500;letter-spacing:.2px}
.appbar .spacer{flex:1}
.icon-btn{
  width:42px;height:42px;border-radius:50%;border:none;background:transparent;color:var(--on-surface-variant);
  display:grid;place-items:center;cursor:pointer;transition:background-color .2s var(--ease-out)}
.icon-btn:active{background-color:rgba(255,255,255,.1)}

/* ---------- content ---------- */
main{max-width:900px;margin:0 auto;padding:8px 16px 0;min-height:calc(100vh - 176px)}
.view-in{animation:viewIn .34s var(--ease-out) both}
@keyframes viewIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.section-head{display:flex;align-items:baseline;justify-content:space-between;padding:14px 4px 6px}
.section-head h2{font-size:18px;font-weight:500}
.section-head .count{color:var(--on-surface-variant);font-size:13px}

/* ---------- feed ---------- */
.feed{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;padding-top:8px}
.card{
  border-radius:var(--radius);background:var(--surface-container);
  border:1px solid var(--outline);overflow:hidden;display:flex;flex-direction:column;
  animation:cardIn .5s var(--ease-out) both}
@keyframes cardIn{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
.card .thumb-wrap{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-high)}
.card .thumb{width:100%;height:100%;object-fit:cover;display:block}
.card .dur{
  position:absolute;right:6px;bottom:6px;padding:2px 7px;border-radius:8px;font-size:11px;font-weight:500;
  background:rgba(12,11,15,.75);color:#fff}
.card .meta{padding:10px 12px 12px;display:flex;flex-direction:column;gap:4px;flex:1}
.card .title{font-weight:500;font-size:13.5px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .meta-sub{color:var(--on-surface-variant);font-size:12px;display:flex;align-items:center;gap:8px;margin-top:auto}
.card .meta-sub .dot{width:3px;height:3px;border-radius:50%;background:var(--outline-strong)}
.card:active{background-color:var(--surface-high)}

/* ---------- empty ---------- */
.empty{display:flex;flex-direction:column;align-items:center;text-align:center;padding:52px 24px 40px}
.empty .empty-ic{
  width:96px;height:96px;border-radius:28px;background:var(--primary-container);color:var(--on-primary-container);
  display:grid;place-items:center;animation:floatIc 4s var(--ease-out) infinite}
@keyframes floatIc{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.empty h2{margin-top:24px;font-size:22px;font-weight:500}
.empty p{margin-top:10px;color:var(--on-surface-variant);font-size:14.5px;line-height:1.7}
.btn{
  margin-top:26px;border:none;border-radius:999px;padding:14px 26px;font-size:15px;font-weight:500;
  background:var(--primary-container);color:var(--on-primary-container);cursor:pointer;
  display:inline-flex;align-items:center;gap:8px;transition:transform .25s var(--ease-out),background-color .2s}
.btn:active{transform:scale(.96)}
.btn.tonal{background:var(--secondary-container);color:var(--on-secondary-container)}
.btn:disabled{opacity:.4;pointer-events:none}

/* ---------- bottom nav (Material NavigationBar) ---------- */
.navbar{
  position:fixed;left:0;right:0;bottom:0;z-index:50;background:var(--surface-container);
  border-top:1px solid var(--outline);
  display:flex;justify-content:space-around;align-items:flex-start;
  padding:6px 4px calc(8px + env(safe-area-inset-bottom));
  padding-bottom:calc(8px + env(safe-area-inset-bottom))}
.navbar .tab{
  position:relative;flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;
  border:none;background:transparent;color:var(--on-surface-variant);cursor:pointer;
  padding:4px 0 2px;border-radius:16px;transition:color .25s var(--ease-out)}
.navbar .tab .ic{width:24px;height:24px;display:grid;place-items:center}
.navbar .tab .lbl{font-size:12px;font-weight:500;transition:font-weight .2s}
.navbar .tab.active{color:var(--primary)}
.navbar .indicator{
  position:absolute;top:3px;height:calc(100% - 6px);border-radius:18px;background:var(--primary-container);
  transition:left .38s var(--ease-standard),width .38s var(--ease-standard);opacity:.92}
.navbar .tab{z-index:2}
.navbar .tab:active{background-color:rgba(255,255,255,.05)}

/* ---------- fab ---------- */
.fab{
  position:fixed;right:18px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:49;
  display:flex;align-items:center;gap:8px;border:none;border-radius:999px;
  background:var(--primary-container);color:var(--on-primary-container);
  padding:0 20px;height:56px;font-size:15px;font-weight:500;cursor:pointer;
  box-shadow:0 4px 12px rgba(0,0,0,.35);
  transition:transform .25s var(--ease-out),box-shadow .25s var(--ease-out)}
.fab:active{transform:scale(.92);box-shadow:0 2px 6px rgba(0,0,0,.3)}
.fab .plus{font-size:22px;line-height:1;transition:transform .3s var(--ease-standard)}
.fab.open .plus{transform:rotate(45deg)}

/* ---------- sheet ---------- */
.scrim{position:fixed;inset:0;z-index:60;background:rgba(0,0,0,.5);opacity:0;transition:opacity .3s var(--ease-out)}
.scrim.show{opacity:1}
.sheet{
  position:fixed;z-index:61;left:50%;bottom:0;transform:translate(-50%,110%);
  width:min(560px,100%);background:var(--surface-container);
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
  padding:10px 20px calc(20px + env(safe-area-inset-bottom));
  transition:transform .4s var(--ease-standard);max-height:92vh;overflow:auto}
.sheet.show{transform:translate(-50%,0)}
.sheet .handle{width:36px;height:4px;border-radius:2px;background:var(--outline-strong);margin:6px auto 14px}
.sheet-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.sheet-head h3{font-size:19px;font-weight:500}
.drop{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  padding:30px 18px;border-radius:var(--radius);border:2px dashed var(--outline-strong);
  color:var(--on-surface-variant);cursor:pointer;text-align:center;
  transition:border-color .25s,background-color .25s}
.drop:hover{border-color:var(--primary)}
.drop.has-file{border-style:solid;border-color:var(--primary);background:var(--primary-container)}
.drop-title{font-weight:500;color:var(--on-surface)}
.drop-sub{font-size:12.5px;color:var(--on-surface-variant)}
.field{
  width:100%;margin-top:14px;padding:13px 16px;border-radius:12px;
  border:1px solid var(--outline-strong);background:transparent;color:var(--on-surface);font-size:15px;outline:none;
  transition:border-color .2s,box-shadow .2s}
.field::placeholder{color:var(--on-surface-variant)}
.field:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(208,188,255,.2)}
/* Material linear progress */
.progress{position:relative;margin-top:14px;height:6px;border-radius:3px;background:var(--surface-highest);overflow:hidden}
.progress .bar{position:absolute;left:0;top:0;bottom:0;width:0%;background:var(--primary);border-radius:3px;transition:width .2s var(--ease-out)}
.progress .bar.indeterminate{width:40%;animation:indet 1.3s var(--ease-in) infinite}
@keyframes indet{0%{left:-40%}100%{left:100%}}
.progress-text{margin-top:8px;color:var(--on-surface-variant);font-size:13px;text-align:center}
.sheet .btn{width:100%;justify-content:center;margin-top:16px}

/* ---------- player ---------- */
.player-scrim{position:fixed;inset:0;z-index:60;background:#0b0a0f;opacity:0;transition:opacity .3s var(--ease-out)}
.player-scrim.show{opacity:1}
.player{
  position:fixed;z-index:61;inset:0;background:var(--surface);display:flex;flex-direction:column;
  opacity:0;transform:scale(1.02);pointer-events:none;transition:opacity .35s var(--ease-out),transform .35s var(--ease-out)}
.player.show{opacity:1;transform:none;pointer-events:auto}
.player .p-bar{display:flex;align-items:center;gap:10px;padding:calc(10px + env(safe-area-inset-top)) 12px 10px}
.player .p-bar .back{width:42px;height:42px;border-radius:50%;border:none;background:transparent;color:var(--on-surface);display:grid;place-items:center;cursor:pointer}
.player .p-bar .back:active{background-color:rgba(255,255,255,.1)}
.player .p-title{font-size:16px;font-weight:500;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.player video{width:100%;max-height:62vh;background:#000;flex-shrink:0}
.player .p-meta{padding:14px 18px;color:var(--on-surface-variant);font-size:13.5px}
.player .p-meta h3{color:var(--on-surface);font-size:17px;font-weight:500;margin-bottom:6px}

/* ---------- custom Material player ---------- */
.video-wrap{position:relative;width:100%;max-height:62vh;background:#000;flex-shrink:0;overflow:hidden}
.video-wrap video{width:100%;max-height:62vh;background:#000;display:block;object-fit:contain}
.p-bigplay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:72px;height:72px;border-radius:50%;
  border:none;background:rgba(0,0,0,.55);color:#fff;display:grid;place-items:center;cursor:pointer;
  backdrop-filter:blur(6px);transition:opacity .25s,transform .25s;z-index:3}
.p-bigplay:hover{transform:translate(-50%,-50%) scale(1.06)}
.p-controls{position:absolute;left:0;right:0;bottom:0;display:flex;align-items:center;gap:10px;padding:26px 12px 10px;
  background:linear-gradient(transparent,rgba(0,0,0,.72));opacity:0;transition:opacity .25s;z-index:2}
.video-wrap:hover .p-controls,.video-wrap.showing .p-controls{opacity:1}
.pc-btn{width:38px;height:38px;border-radius:50%;border:none;background:transparent;color:#fff;display:grid;place-items:center;cursor:pointer;flex-shrink:0}
.pc-btn:active{background-color:rgba(255,255,255,.18)}
.pc-btn .ic-pause{display:none}
.pc-btn.playing .ic-play{display:none}
.pc-btn.playing .ic-pause{display:block}
.pc-progress{flex:1;height:4px;border-radius:99px;background:rgba(255,255,255,.28);cursor:pointer;position:relative}
.pc-progress .pc-fill{position:absolute;left:0;top:0;bottom:0;width:0;border-radius:99px;background:var(--primary)}
.pc-progress .pc-knob{position:absolute;top:50%;width:12px;height:12px;border-radius:50%;background:#fff;
  transform:translate(-50%,-50%);box-shadow:0 1px 4px rgba(0,0,0,.5);opacity:0;transition:opacity .2s}
.pc-progress:hover .pc-knob{opacity:1}
.pc-time{color:#fff;font-size:12.5px;font-variant-numeric:tabular-nums;flex-shrink:0;min-width:92px;text-align:right}

/* ---------- snackbar ---------- */
.snackbar{
  position:fixed;z-index:70;left:16px;right:16px;bottom:calc(88px + env(safe-area-inset-bottom));
  display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:14px;
  background:var(--inverse-surface);color:var(--inverse-on-surface);font-size:14px;
  box-shadow:0 6px 20px rgba(0,0,0,.4);
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(24px);
  transition:opacity .3s var(--ease-out),transform .35s var(--ease-standard),visibility .35s}
.snackbar.show{opacity:1;visibility:visible;pointer-events:auto;transform:none}
.snackbar .action{border:none;background:none;color:var(--primary);font-weight:600;font-size:14px;cursor:pointer;margin-left:auto;padding:4px 6px}

/* upload float (background upload) */
.up-float{position:fixed;left:16px;right:16px;bottom:calc(96px + env(safe-area-inset-bottom));z-index:68;padding:10px 14px;border-radius:16px;background:var(--surface-container);border:1px solid var(--outline-variant);box-shadow:0 4px 20px rgba(0,0,0,.5);color:var(--on-surface);transform:translateY(140%);opacity:0;visibility:hidden;transition:transform .3s var(--ease-out),opacity .3s var(--ease-out),visibility .3s}
.up-float.show{transform:none;opacity:1;visibility:visible}
.up-float-row{display:flex;align-items:center;gap:10px;color:var(--primary)}
.up-float-info{flex:1;min-width:0}
.up-float-title{font-size:13px;font-weight:500;color:var(--on-surface);margin-bottom:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.up-float-bar{height:4px;border-radius:2px;background:var(--surface-highest);overflow:hidden}
.up-float-fill{height:100%;border-radius:2px;background:var(--primary);width:0%;transition:width .25s var(--ease-out)}
.up-float-pct{font-size:13px;font-weight:600;color:var(--primary);min-width:38px;text-align:right;font-variant-numeric:tabular-nums}

/* ---------- profile tab ---------- */
.profile{display:flex;flex-direction:column;gap:14px;padding:18px 0 20px}
.profile .p-card{background:var(--surface-container);border:1px solid var(--outline);border-radius:var(--radius);padding:20px}
.profile .avatar{width:64px;height:64px;border-radius:50%;background:var(--primary-container);color:var(--on-primary-container);display:grid;place-items:center;font-size:26px;font-weight:600}
.profile .p-name{font-size:17px;font-weight:500;margin-top:14px}
.profile .p-sub{color:var(--on-surface-variant);font-size:13.5px;margin-top:4px;line-height:1.6}
.profile .stat-row{display:flex;gap:12px;margin-top:16px}
.profile .stat{flex:1;background:var(--surface-high);border-radius:12px;padding:12px;text-align:center}
.profile .stat .n{font-size:20px;font-weight:600}
.profile .stat .l{color:var(--on-surface-variant);font-size:12px;margin-top:2px}
.profile .row-item{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;
  background:var(--surface-container);border:1px solid var(--outline);border-radius:var(--radius)}
.profile .row-item .t{font-size:14.5px}
.profile .row-item .s{color:var(--on-surface-variant);font-size:13px}
.profile .badge{font-size:12px;padding:4px 10px;border-radius:999px;background:var(--tertiary-container);color:var(--on-tertiary-container)}

/* ---------- avatar (identity) ---------- */
.av{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;overflow:hidden;flex-shrink:0;
  object-fit:cover;user-select:none;line-height:1;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12)}
.profile .p-card .av{margin-bottom:2px}
.card-author{display:flex;align-items:center;gap:6px;margin-top:8px}
.card-author .ca-name{font-size:12px;color:var(--on-surface-variant);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- edit profile sheet ---------- */
.edit-avatar-preview{display:flex;justify-content:center;margin:6px 0 14px}
.field-label{display:block;font-size:13px;color:var(--on-surface-variant);margin:14px 4px 6px}
.avatar-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;padding:4px 0 8px}
.av-opt{aspect-ratio:1;border-radius:50%;border:2px solid transparent;font-size:22px;display:grid;place-items:center;
  cursor:pointer;transition:transform .15s var(--ease-out);padding:0}
.av-opt.sel{border-color:var(--primary);transform:scale(1.12);box-shadow:0 0 0 3px rgba(208,188,255,.3)}
.av-opt:active{transform:scale(.94)}

/* ---------- skeleton ---------- */
.sk{border-radius:var(--radius);background:var(--surface-container);border:1px solid var(--outline);overflow:hidden}
.sk .s-thumb{aspect-ratio:16/10;background:var(--surface-high);animation:shimmer 1.3s infinite}
.sk .s-line{height:12px;margin:12px 12px 0;border-radius:6px;background:var(--surface-high);animation:shimmer 1.3s infinite}
.sk .s-line.short{width:55%;margin-bottom:14px}
@keyframes shimmer{0%,100%{opacity:.5}50%{opacity:1}}

@media (min-width:600px){
  .feed{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
}

/* ---------- watch page (Bilibili-style, lean) ---------- */
.watch{padding:14px 18px calc(30px + env(safe-area-inset-bottom));overflow-y:auto;flex:1}
.w-title{font-size:19px;font-weight:600;line-height:1.45}
.w-meta{display:flex;align-items:center;gap:14px;margin-top:12px;color:var(--on-surface-variant);font-size:13px;flex-wrap:wrap}
.w-owner{display:flex;align-items:center;gap:8px;color:var(--on-surface);font-weight:500}
.w-avatar{width:30px;height:30px;border-radius:50%;background:var(--primary-container);color:var(--on-primary-container);display:grid;place-items:center;font-size:14px;font-weight:700}
.w-stat{display:flex;align-items:center;gap:5px}
.w-stat b{color:var(--on-surface);font-weight:600}
.w-actions{display:flex;gap:10px;margin-top:14px}
.chip{
  display:inline-flex;align-items:center;gap:6px;border:1px solid var(--outline);
  background:var(--surface-container);color:var(--on-surface);border-radius:999px;
  padding:8px 16px;font-size:13.5px;font-weight:500;cursor:pointer;
  transition:background-color .2s,color .2s,border-color .2s}
.chip.liked{background:var(--primary-container);border-color:var(--primary);color:var(--on-primary-container)}
.chip:active{background-color:var(--surface-high)}
.comments{margin-top:20px;border-top:1px solid var(--outline);padding-top:14px}
.c-head{font-size:15px;font-weight:600}
.c-n{color:var(--on-surface-variant);font-weight:400;font-size:13px;margin-left:4px}
.c-form{margin-top:14px}
.c-name{width:100%;padding:10px 14px;border-radius:10px}
.c-row{display:flex;gap:8px;margin-top:8px}
.c-text{flex:1;padding:10px 14px;border-radius:10px;margin-top:0}
.c-send{height:40px;padding:0 18px;margin-top:0;border-radius:10px;flex-shrink:0}
.c-item{display:flex;gap:10px;padding:12px 0;border-bottom:1px solid var(--outline)}
.c-avatar{width:30px;height:30px;border-radius:50%;background:var(--tertiary-container);color:var(--on-tertiary-container);display:grid;place-items:center;font-size:13px;font-weight:700;flex-shrink:0}
.c-body{flex:1;min-width:0}
.c-auth{font-size:12.5px;color:var(--on-surface-variant)}
.c-text2{margin-top:3px;font-size:14px;line-height:1.55;word-break:break-word;white-space:pre-wrap}
.c-empty{color:var(--on-surface-variant);font-size:13.5px;text-align:center;padding:22px 0}

/* ---------- cover upload ---------- */
.cover-row{display:flex;align-items:center;gap:12px;margin-top:4px}
.cover-preview{width:112px;height:64px;border-radius:12px;background:var(--surface-container);display:grid;place-items:center;
  overflow:hidden;color:var(--on-surface-variant);font-size:12px;flex-shrink:0}
.cover-preview img{width:100%;height:100%;object-fit:cover}
.btn-ghost{background:transparent;color:var(--primary);border:1px solid var(--outline);box-shadow:none}
textarea.field{resize:none;line-height:1.5}
.field.area{padding-top:10px}

/* ---------- watch tabs (intro / comments) ---------- */
.w-tabs{display:flex;position:relative;margin-top:18px;border-bottom:1px solid var(--outline)}
.w-tab{flex:1;padding:13px 4px;background:none;border:none;color:var(--on-surface-variant);font-size:15px;font-weight:500;
  cursor:pointer;position:relative;z-index:2;transition:color .25s var(--ease-standard)}
.w-tab.active{color:var(--primary)}
.w-tab-ind{position:absolute;bottom:0;height:3px;border-radius:99px;background:var(--primary);transition:left .3s var(--ease-standard),width .3s var(--ease-standard)}
.w-panels{position:relative;overflow:hidden}
.w-panel{display:none}
.w-panel.active{display:block;animation:panelIn .3s var(--ease-out) both}
@keyframes panelIn{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}
.w-intro{margin-top:16px;font-size:14.5px;line-height:1.65;color:var(--on-surface);white-space:pre-wrap;word-break:break-word}
.w-intro-empty{color:var(--on-surface-variant)}
.w-meta-card{margin-top:18px;background:var(--surface-container);border-radius:14px;padding:6px 16px}
.w-meta-row{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px solid var(--outline)}
.w-meta-row:last-child{border-bottom:none}
.w-meta-row span{color:var(--on-surface-variant);font-size:13.5px}
.w-meta-row b{font-size:13.5px;font-weight:500}
.w-panel .c-form{margin-top:16px}