:root {
      --bg: #05060a;
      --text: #f5f7fb;
      --muted: rgba(242, 244, 248, 0.72);
      --accent: #8eb0ff;
      --like: #ff4d6d;
      --glass: rgba(8, 10, 16, 0.55);
      --glass-strong: rgba(16, 18, 26, 0.96);
      --pane: #0c0e14;
      --safe-t: env(safe-area-inset-top, 0px);
      --safe-b: env(safe-area-inset-bottom, 0px);
    }
    * { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
    html, body {
      margin: 0; height: 100%;
      background: var(--bg); color: var(--text);
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
      overflow: hidden;
    }
    .app {
      position: relative;
      height: 100%;
      height: 100dvh;
      max-width: 480px;
      margin: 0 auto;
      background: #000;
      overflow: hidden;
    }
    .feed {
      height: 100%;
      overflow-y: auto;
      overflow-x: hidden;
      scroll-snap-type: y mandatory;
      scroll-behavior: smooth;
      -webkit-overflow-scrolling: touch;
      overscroll-behavior-y: contain;
    }
    .feed::-webkit-scrollbar { display: none; }

    /* Card = vertical layout split (NOT overlay sheet over media) */
    .card {
      position: relative;
      height: 100%;
      height: 100dvh;
      width: 100%;
      scroll-snap-align: start;
      scroll-snap-stop: always;
      overflow: hidden;
      background: #0a0c12;
      touch-action: pan-y;
      user-select: none;
      display: flex;
      flex-direction: column;
    }

    .media-pane {
      position: relative;
      flex: 1 1 auto;
      min-height: 0;
      /* Loading placeholder (never flat black): soft gradient until poster/frame paints */
      background: radial-gradient(ellipse at 50% 45%, #1c2232 0%, #0b0d13 70%);
      overflow: hidden;
      transition: max-height 0.28s cubic-bezier(.2,.8,.2,1), flex-basis 0.28s cubic-bezier(.2,.8,.2,1);
    }
    .prompt-pane {
      position: relative;
      flex: 0 0 auto;
      min-height: 0;
      max-height: 50%;
      background: var(--pane);
      border-top: 1px solid rgba(255,255,255,0.08);
      display: flex;
      flex-direction: column;
      overflow: hidden;
      transition: max-height 0.28s cubic-bezier(.2,.8,.2,1), flex-basis 0.28s cubic-bezier(.2,.8,.2,1);
      z-index: 4;
    }

    /* Media-full (default): media fills card; source LL + truncated prompt LR */
    .card.mode-media .media-pane {
      flex: 1 1 100%;
      max-height: 100%;
    }
    .card.mode-media .prompt-pane {
      display: none;
    }
    .card.mode-media .source-on-media { display: inline-flex; }
    .card.mode-media .prompt-on-media { display: block; }
    .card.mode-media .rail { bottom: calc(1.4rem + var(--safe-b)); }
    .card.mode-media .scroll-cue { display: block; }
    .card.mode-media .media-pane { cursor: pointer; }

    /* Half split (on select): full prompt bottom; no Copy button (long-press copies) */
    .card.mode-half .media-pane {
      flex: 1 1 auto;
      max-height: none;
      min-height: 50%;
      cursor: pointer; /* tap media to collapse prompt pane */
    }
    .card.mode-half .prompt-pane {
      display: block;
      flex: 0 0 auto;
      max-height: 50%;
      height: auto;
      padding: 0.75rem 1rem calc(0.85rem + var(--safe-b));
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
      position: relative;
    }
    .card.mode-half .prompt-pane .prompt-toolbar { display: none; }
    .card.mode-half .prompt-pane .prompt-snip { display: none; }
    .card.mode-half .prompt-on-media { display: none; }
    .card.mode-half .prompt-pane .source-in-prompt { display: none; }
    .card.mode-half .prompt-pane .prompt-full {
      display: block;
      flex: none;
      max-height: none;
      overflow: visible;
      margin: 0;
      -webkit-touch-callout: none;
      user-select: none;
      -webkit-user-select: none;
      cursor: default;
    }
    .card.mode-half .source-on-media { display: inline-flex; }
    /* Keep like/dislike/skip rail on media (do not move into prompt pane) */
    .card.mode-half .rail { bottom: 0.75rem; }
    .card.mode-half .scroll-cue { display: none; }
    .card.mode-half .vignette {
      background:
        radial-gradient(ellipse at center, transparent 42%, rgba(0,0,0,0.35) 100%),
        linear-gradient(to bottom, rgba(0,0,0,0.4) 0%, transparent 22%);
    }
    .card.mode-half a.source-name.source-on-media {
      bottom: 0.75rem;
    }

    /* Full-prompt: media collapses; prompt fills screen */
    .card.mode-prompt .media-pane {
      flex: 0 0 0;
      max-height: 0;
      min-height: 0;
      overflow: hidden;
      pointer-events: none;
    }
    .card.mode-prompt .prompt-pane {
      flex: 1 1 100%;
      max-height: 100%;
      padding: calc(0.7rem + var(--safe-t)) 1rem calc(1rem + var(--safe-b));
    }
    .card.mode-prompt .prompt-pane .prompt-snip { display: none; }
    .card.mode-prompt .prompt-on-media { display: none; }
    .card.mode-prompt .prompt-pane .prompt-full { display: block; -webkit-touch-callout: none; user-select: none; -webkit-user-select: none; }
    .card.mode-prompt .prompt-pane .prompt-toolbar { display: none; }
    .card.mode-prompt .prompt-pane .source-in-prompt { display: none; }
    .card.mode-prompt .source-on-media { display: none; }
    .card.mode-prompt .rail,
    .card.mode-prompt .chrome-top,
    .card.mode-prompt .scroll-cue { display: none; }

    .card .swipe-layer {
      position: absolute; inset: 0;
      z-index: 2;
      /* Spring back (below threshold) */
      transition: transform 0.34s cubic-bezier(.34,1.45,.64,1), opacity 0.22s ease;
      will-change: transform;
    }
    .card.flying .swipe-layer { transition: transform 0.38s cubic-bezier(.3,.6,.4,1), opacity 0.38s ease; }
    .card.flying .stamp { transition: opacity 0.38s ease; }
    @media (prefers-reduced-motion: reduce) {
      .card .swipe-layer, .card.flying .swipe-layer { transition: none; }
      .react-flash.show { animation: none; }
      .feed { scroll-behavior: auto; }
    }
    .card.dragging .swipe-layer { transition: none; will-change: transform; }
    .feed.vdrag { will-change: transform; scroll-snap-type: none; }
    .feed.vdrag .card { pointer-events: none; }
    /* Swipe layer handles both axes in JS (vertical = follow finger, then slide to next/prev) */
    .card .swipe-layer { touch-action: none; }
    .card .media {
      position: absolute; inset: 0;
      width: 100%; height: 100%;
      object-fit: contain; /* show the full media */
      background: transparent;
      pointer-events: none;
    }
    /* Blurred, darkened, scaled-up copy of the same media fills the letterbox area */
    .card .media-bd {
      position: absolute; inset: -10%;
      width: 120%; height: 120%;
      object-fit: cover;
      filter: blur(28px) brightness(0.45) saturate(1.2);
      transform: translateZ(0);
      pointer-events: none;
      background: #111;
    }
    canvas.media-bd { opacity: 0; transition: opacity 0.3s ease; }
    canvas.media-bd.ready { opacity: 1; }
    .card video.media { pointer-events: auto; }
    .card .vignette {
      position: absolute; inset: 0;
      pointer-events: none;
      background:
        radial-gradient(ellipse at center, transparent 42%, rgba(0,0,0,0.45) 100%),
        linear-gradient(to top, rgba(0,0,0,0.55) 0%, transparent 38%),
        linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 22%);
      z-index: 1;
    }
    .card .swipe-layer .media,
    .card .swipe-layer .vignette { position: absolute; inset: 0; }

    .stamp {
      position: absolute; top: 18%;
      font-size: clamp(2.2rem, 9vw, 3.2rem);
      font-weight: 900;
      opacity: 0;
      pointer-events: none;
      z-index: 4;
      filter: drop-shadow(0 2px 12px rgba(0,0,0,0.5));
    }
    .stamp.like { left: 12%; color: var(--like); transform: rotate(-14deg); }
    .stamp.dislike { right: 12%; color: #fff; transform: rotate(14deg); }

    .chrome-top {
      position: absolute; top: 0; left: 0; right: 0;
      z-index: 5;
      display: flex; justify-content: space-between; align-items: center;
      padding: calc(0.7rem + var(--safe-t)) 0.85rem 0.5rem;
      pointer-events: none;
      gap: 0.5rem;
    }
    .chrome-top > * { pointer-events: auto; }
    .chrome-top .left-tools,
    .chrome-top .right-tools {
      display: flex; gap: 0.45rem; align-items: center;
    }
    /* Extra air between filter and the like-heat bar (temperature) */
    .chrome-top .left-tools { margin-right: 0.85rem; }
    .icon-btn {
      width: 44px; height: 44px;
      border: none; border-radius: 50%;
      background: var(--glass); color: var(--text);
      backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
      cursor: pointer;
      display: grid; place-items: center;
      box-shadow: 0 4px 18px rgba(0,0,0,0.35);
      padding: 0;
    }
    .icon-btn svg { width: 22px; height: 22px; display: block; }
    .icon-btn:active { transform: scale(0.92); }
    .icon-btn.active { color: var(--accent); position: relative; }
    /* Filter: quieter than info so it doesn't steal the eye; active = tiny dot */
    .chrome-top .left-tools [data-filter] {
      width: 34px; height: 34px;
      opacity: 0.72;
      box-shadow: 0 2px 10px rgba(0,0,0,0.28);
    }
    .chrome-top .left-tools [data-filter] svg { width: 17px; height: 17px; }
    .chrome-top .left-tools [data-filter].active { opacity: 1; }
    .chrome-top .icon-btn.active::after {
      content: ""; position: absolute; top: 9px; right: 9px;
      width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
    }
    .chrome-top .left-tools [data-filter].active::after {
      top: 6px; right: 6px; width: 5px; height: 5px;
    }
    .filter-grid .icon-btn.active {
      background: rgba(142, 176, 255, 0.35);
      color: #dff0ff;
      box-shadow: 0 0 0 2px rgba(142,176,255,0.55), 0 4px 18px rgba(0,0,0,0.35);
    }

    /* Top-of-media like heat (visual only; no labels) */
    .like-overlay {
      position: absolute;
      top: 0; left: 0; right: 0;
      z-index: 4;
      pointer-events: none;
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 0.55rem;
      /* Same row box as .chrome-top (padding-top + 44px icon-btn) so hearts share the buttons' vertical center */
      height: calc(0.7rem + var(--safe-t) + 44px);
      padding: calc(0.7rem + var(--safe-t)) 7.9rem 0;
    }
    .like-overlay-bar {
      flex: 1 1 auto;
      max-width: 11.5rem;
      height: 5px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.16);
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
      overflow: hidden;
    }
    .like-overlay-fill {
      height: 100%;
      width: calc(var(--like-fill, 0) * 100%);
      background: linear-gradient(90deg, rgba(255, 77, 109, 0.45), var(--like));
      border-radius: inherit;
      box-shadow: 0 0 10px rgba(255, 77, 109, 0.45);
      transition: width 0.35s ease;
    }
    .like-overlay-hearts {
      display: flex;
      gap: 0.22rem;
      align-items: center;
      flex: 0 0 auto;
      pointer-events: auto; /* allow hover tooltip */
      cursor: default;
    }
    .like-overlay-hearts .h {
      width: 12px;
      height: 12px;
      color: var(--like);
      opacity: 0.22;
      filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.55));
      transition: opacity 0.25s ease;
    }
    .like-overlay-hearts .h { display: block; }
    .like-overlay-hearts .h svg { display: block; width: 100%; height: 100%; } /* no inline-baseline offset */
    .like-overlay-hearts .h.on { opacity: 1; }
    .like-overlay-hearts .h.part { opacity: 0.55; }
    .card.mode-prompt .like-overlay { display: none; }


    .prompt-toolbar { display: none; }

    /* Brief check/toast when long-press copies prompt */
    .copy-toast {
      position: absolute;
      left: 50%;
      bottom: calc(1.15rem + var(--safe-b));
      transform: translateX(-50%) translateY(10px);
      z-index: 25;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.35rem;
      min-width: 44px;
      height: 44px;
      padding: 0 0.95rem;
      border-radius: 999px;
      background: rgba(110, 231, 168, 0.92);
      color: #0b1a12;
      box-shadow: 0 8px 28px rgba(0,0,0,0.4);
      opacity: 0;
      pointer-events: none;
      font-weight: 700;
      font-size: 0.92rem;
    }
    .copy-toast svg { width: 20px; height: 20px; display: block; }
    .copy-toast.show {
      animation: copyToastFlash 1.05s cubic-bezier(.15,.85,.25,1) forwards;
    }
    @keyframes copyToastFlash {
      0% { opacity: 0; transform: translateX(-50%) translateY(12px) scale(0.85); }
      18% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1.05); }
      70% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
      100% { opacity: 0; transform: translateX(-50%) translateY(-6px) scale(0.98); }
    }

    a.source-name {
      display: inline-flex; align-items: center; gap: 0.35rem;
      max-width: min(86%, 16rem);
      padding: 0.4rem 0.85rem 0.4rem 0.65rem;
      border-radius: 999px;
      background: var(--glass);
      backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
      box-shadow: 0 4px 18px rgba(0,0,0,0.35);
      color: var(--accent);
      text-decoration: none;
      font-size: 0.86rem;
      font-weight: 650;
      letter-spacing: 0.01em;
      flex-shrink: 0;
      z-index: 5;
    }
    a.source-name svg { width: 14px; height: 14px; flex-shrink: 0; opacity: 0.9; }
    a.source-name .src-label {
      overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
      max-width: 14rem;
    }
    /* Lower-left overlay on media (media-full + half split) */
    a.source-name.source-on-media {
      position: absolute;
      left: 0.85rem;
      bottom: calc(1rem + var(--safe-b));
      top: auto;
      transform: none;
      margin: 0;
      pointer-events: auto;
      max-width: min(46%, 14rem);
    }
    /* Prompt-pane source copy: unused (source stays LL on media) */
    a.source-name.source-in-prompt {
      display: none;
      align-self: flex-start;
      margin-bottom: 0.55rem;
      background: rgba(255,255,255,0.06);
      box-shadow: none;
      backdrop-filter: none; -webkit-backdrop-filter: none;
    }

    /* Lower-right truncated prompt on media (default); ellipsis if wider than gap */
    .prompt-snip.prompt-on-media,
    button.prompt-on-media[data-prompt-snip] {
      position: absolute;
      left: calc(0.85rem + min(46%, 14rem) + 0.4rem);
      right: calc(0.65rem + 46px + 0.55rem);
      bottom: calc(1rem + var(--safe-b));
      z-index: 5;
      display: none;
      margin: 0;
      padding: 0;
      border: none;
      background: transparent;
      color: var(--text);
      font: inherit;
      font-weight: 600;
      font-size: 0.9rem;
      line-height: 1.35;
      text-align: right;
      cursor: pointer;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      text-shadow: 0 1px 8px rgba(0,0,0,0.75), 0 0 2px rgba(0,0,0,0.85);
      -webkit-tap-highlight-color: transparent;
      pointer-events: auto;
    }
    .card.mode-media .prompt-snip.prompt-on-media { display: block; }
    .card.mode-half a.source-name.source-on-media ~ .prompt-on-media,
    .card.mode-half .prompt-on-media { display: none; }
    .prompt-snip.prompt-on-media:hover,
    .prompt-snip.prompt-on-media:active {
      text-decoration: underline;
      text-decoration-color: rgba(255,255,255,0.45);
    }
    /* Legacy pane snip (unused in half/full — full prompt shown instead) */
    .prompt-pane .prompt-snip {
      border: none; background: transparent; padding: 0;
      color: var(--text);
      font: inherit;
      font-weight: 600;
      font-size: 0.95rem;
      line-height: 1.4;
      text-align: left;
      cursor: pointer;
      opacity: 0.95;
      overflow: hidden;
      display: none;
      width: 100%;
    }
    .prompt-full {
      display: none;
      color: var(--text);
      line-height: 1.5;
      white-space: pre-wrap;
      font-weight: 500;
      font-size: 1.02rem;
      margin: 0;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
      flex: 1 1 auto;
      min-height: 0;
    }

    .rail {
      position: absolute;
      right: 0.65rem;
      bottom: calc(5.5rem + var(--safe-b));
      z-index: 6;
      display: flex; flex-direction: column; gap: 0.85rem;
      align-items: center;
      pointer-events: none;
    }
    .rail > * { pointer-events: auto; }
    .rail .icon-btn {
      width: 46px; height: 46px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.35);
      background: rgba(8, 10, 16, 0.42);
    }
    .rail .icon-btn svg { width: 22px; height: 22px; }
    .rail .btn-like { color: var(--like); }
    .rail .btn-dislike { color: #ffb0b0; }
    /* Vote state shown on the card's own buttons */
    .rail .btn-vote { transition: background 0.18s ease, color 0.18s ease, opacity 0.18s ease, box-shadow 0.18s ease; }
    .rail .btn-like.voted { background: var(--like); color: #fff; box-shadow: 0 0 0 2px rgba(255,77,109,0.45), 0 4px 16px rgba(0,0,0,0.35); }
    .rail .btn-dislike.voted { background: #ff8a8a; color: #2a0b0b; box-shadow: 0 0 0 2px rgba(255,138,138,0.45), 0 4px 16px rgba(0,0,0,0.35); }
    .rail .btn-vote.dim { opacity: 0.5; }
    .rail .btn-next { color: var(--accent); }
    .rail .btn-sound { color: var(--text); }
    .rail .btn-sound.on { color: var(--accent); }

    .react-flash {
      position: absolute; inset: 0;
      z-index: 8;
      display: flex; align-items: center; justify-content: center;
      pointer-events: none;
      opacity: 0;
    }
    .react-flash.show {
      animation: reactPop 0.7s cubic-bezier(.15,.85,.25,1) forwards;
    }
    .react-flash .glyph {
      font-size: 5.5rem;
      filter: drop-shadow(0 8px 28px rgba(0,0,0,0.55));
    }
    @keyframes reactPop {
      0% { opacity: 0; transform: scale(0.4); }
      35% { opacity: 1; transform: scale(1.15); }
      100% { opacity: 0; transform: scale(1.35); }
    }

    /* Filter (+ info) = modal overlay sheet */
    .overlay {
      position: absolute; inset: 0; z-index: 30;
      background: rgba(0,0,0,0.45);
      display: none; align-items: center; justify-content: center;
      padding: 1.25rem;
    }
    .overlay.open { display: flex; }
    .overlay.dock {
      align-items: flex-end;
      padding: 0;
    }
    .sheet {
      width: 100%;
      max-width: 420px;
      max-height: min(70vh, 78%);
      background: var(--glass-strong);
      backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
      border-radius: 18px;
      padding: 0.65rem 1rem 1rem;
      overflow-y: auto;
      box-shadow: 0 12px 40px rgba(0,0,0,0.45);
      border: 1px solid rgba(255,255,255,0.08);
      -webkit-overflow-scrolling: touch;
    }
    .overlay.dock .sheet {
      max-width: none;
      border-radius: 18px 18px 0 0;
      padding-bottom: calc(1rem + var(--safe-b));
      border-left: none; border-right: none; border-bottom: none;
    }
    /* Desktop: dock sheet constrained to the main column (.app max-width) and centered with it */
    @media (min-width: 481px) {
      .overlay.dock .sheet {
        max-width: 480px;
        margin: 0 auto;
        border-left: 1px solid rgba(255,255,255,0.08);
        border-right: 1px solid rgba(255,255,255,0.08);
      }
    }
    /* Audio results: no image to show → render a player + caption instead of a blank <img> */
    .media-retry {
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      z-index: 7; border: none; border-radius: 999px; padding: 0.6rem 1.1rem;
      background: rgba(16,18,26,0.85); color: var(--text); font: inherit; font-weight: 650;
      cursor: pointer; box-shadow: 0 6px 22px rgba(0,0,0,0.45);
    }
    .audio-stage {
      position: absolute; inset: 0;
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      gap: 1rem;
      padding: 5rem 1.25rem 6rem;
      background: radial-gradient(ellipse at 50% 40%, #1b2236 0%, #0a0c12 70%);
      text-align: center;
    }
    .audio-stage .audio-icon { color: var(--accent); opacity: 0.9; }
    .audio-stage .audio-icon svg { width: 72px; height: 72px; display: block; }
    .audio-stage .audio-caption { color: var(--muted); font-size: 0.95rem; line-height: 1.4; max-width: 22rem; }
    .audio-stage .audio-caption:empty { display: none; }
    .audio-stage .audio-label {
      display: inline-flex; align-items: center; gap: 0.4rem;
      padding: 0.3rem 0.8rem; border-radius: 999px;
      background: rgba(142,176,255,0.16); color: var(--accent);
      font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
      pointer-events: auto; cursor: default;
    }
    .audio-stage .audio-label svg { width: 16px; height: 16px; display: block; }
    .audio-stage .audio-label { white-space: nowrap; }
    .audio-stage .audio-wave { display: flex; align-items: center; gap: 4px; height: 56px; }
    .audio-stage .audio-wave i {
      display: block; width: 5px; border-radius: 3px;
      background: linear-gradient(to top, rgba(142,176,255,0.5), var(--accent));
    }
    .audio-stage.playing .audio-wave i { animation: wave 0.9s ease-in-out infinite alternate; }
    @keyframes wave { from { transform: scaleY(0.45); } to { transform: scaleY(1.05); } }
    .audio-stage .audio-play {
      width: 76px; height: 76px; border-radius: 50%;
      border: none; cursor: pointer; pointer-events: auto;
      background: var(--accent); color: #0a0c12;
      display: grid; place-items: center;
      box-shadow: 0 8px 28px rgba(0,0,0,0.45);
      position: relative; z-index: 3;
    }
    .audio-stage .audio-play svg { width: 34px; height: 34px; display: block; }
    .audio-stage .audio-play:active { transform: scale(0.94); }
    .audio-stage audio { width: min(100%, 20rem); position: relative; z-index: 3; pointer-events: auto; }
    .sheet.sheet-tall { max-height: min(70vh, 78%); }
    .sheet .grab {
      width: 42px; height: 4px; border-radius: 99px;
      background: rgba(255,255,255,0.22);
      margin: 0.15rem auto 0.65rem;
    }
    .sheet-toolbar {
      display: flex; justify-content: flex-end; align-items: center;
      gap: 0.45rem; margin-bottom: 0.55rem;
    }
    .sheet-toolbar .icon-btn {
      width: 40px; height: 40px;
      background: rgba(42, 49, 64, 0.9);
    }
    .sheet .row {
      margin: 0.55rem 0; font-size: 0.9rem; color: var(--muted);
      display: flex; align-items: flex-start; gap: 0.65rem;
    }
    .sheet .row .k {
      width: 28px; height: 28px; flex: 0 0 auto;
      display: grid; place-items: center;
      color: var(--accent);
    }
    .sheet .row .k svg { width: 18px; height: 18px; }
    .sheet .row a { color: var(--accent); }
    .sheet .info-footer {
      margin-top: 0.9rem;
      padding-top: 0.75rem;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 0.82rem;
      line-height: 1.4;
    }
    .sheet .info-footer a { color: var(--accent); }
    .filter-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.65rem;
      padding: 0.25rem 0 0.5rem;
    }
    .filter-grid .icon-btn {
      width: 100%;
      height: 64px;
      border-radius: 16px;
    }
    .filter-grid .icon-btn svg { width: 28px; height: 28px; }

    .err {
      position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
      color: #ff7b7b; padding: 2rem; text-align: center; z-index: 5;
    }
    .scroll-cue {
      position: absolute; left: 50%; bottom: calc(5.6rem + var(--safe-b));
      transform: translateX(-50%);
      z-index: 5;
      color: rgba(255,255,255,0.55);
      animation: bob 1.6s ease-in-out infinite;
      pointer-events: none;
      filter: drop-shadow(0 2px 8px rgba(0,0,0,0.5));
      display: none;
    }
    .card.mode-media:first-child .scroll-cue { display: block; }
    .scroll-cue svg { width: 28px; height: 28px; display: block; }
    @keyframes bob {
      0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.45; }
      50% { transform: translateX(-50%) translateY(6px); opacity: 0.9; }
    }
  
  
/* pack-nav: random within data/packs/*; session memory only */
    /* ---- First-visit welcome (shown once per tab; sessionStorage flag only, nothing sent) ---- */
    .welcome {
      position: fixed; inset: 0; z-index: 60;
      display: none; align-items: center; justify-content: center;
      padding: calc(12px + var(--safe-t)) 14px calc(12px + var(--safe-b));
      background: rgba(5, 6, 10, 0.42);
      -webkit-backdrop-filter: blur(14px) saturate(0.9);
      backdrop-filter: blur(14px) saturate(0.9);
    }
    .welcome.open { display: flex; }
    .welcome-panel {
      width: 100%; max-width: 360px;
      max-height: 100%; overflow: auto;
      background: rgba(12, 14, 20, 0.78);
      border: 1px solid rgba(255,255,255,0.09);
      border-radius: 22px;
      box-shadow: 0 18px 60px rgba(0,0,0,0.55);
      padding: 18px 18px 16px;
      text-align: center;
    }
    .welcome h1 { margin: 0; font-size: 1.55rem; font-weight: 800; letter-spacing: -0.01em; }
    .welcome .w-sub { margin: 4px 0 0; color: var(--muted); font-size: 0.9rem; line-height: 1.35; }
    .w-demo { position: relative; height: 74px; margin: 12px auto 8px; width: 150px; }
    .w-card {
      position: absolute; left: 50%; top: 4px; width: 46px; height: 62px; margin-left: -23px;
      border-radius: 9px;
      background: linear-gradient(160deg, #2a3350, #151a28);
      border: 1px solid rgba(255,255,255,0.18);
      animation: w-swipe 3.6s ease-in-out infinite;
    }
    .w-card::before, .w-card::after {
      content: ""; position: absolute; inset: 0; border-radius: 9px; opacity: 0;
      display: flex; align-items: center; justify-content: center;
      font-size: 22px; line-height: 62px; text-align: center;
    }
    .w-card::before { content: "\2665"; color: var(--like); animation: w-like 3.6s ease-in-out infinite; }
    .w-card::after { content: "\2715"; color: #ff8a8a; animation: w-nope 3.6s ease-in-out infinite; }
    .w-hand {
      position: absolute; left: 50%; top: 36px; width: 26px; height: 26px; margin-left: -6px;
      font-size: 24px; line-height: 1;
      animation: w-hand 3.6s ease-in-out infinite;
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.6));
    }
    @keyframes w-swipe {
      0%, 8% { transform: translateX(0) rotate(0); }
      30%, 38% { transform: translateX(42px) rotate(12deg); }
      50%, 58% { transform: translateX(0) rotate(0); }
      80%, 88% { transform: translateX(-42px) rotate(-12deg); }
      100% { transform: translateX(0) rotate(0); }
    }
    @keyframes w-hand {
      0%, 8% { transform: translateX(0); }
      30%, 38% { transform: translateX(42px); }
      50%, 58% { transform: translateX(0); }
      80%, 88% { transform: translateX(-42px); }
      100% { transform: translateX(0); }
    }
    @keyframes w-like { 0%, 14% { opacity: 0; } 28%, 40% { opacity: 1; } 50%, 100% { opacity: 0; } }
    @keyframes w-nope { 0%, 64% { opacity: 0; } 78%, 90% { opacity: 1; } 100% { opacity: 0; } }
    @media (prefers-reduced-motion: reduce) {
      .w-card, .w-hand, .w-card::before, .w-card::after { animation: none; }
    }
    .w-list { list-style: none; margin: 4px 0 0; padding: 0; text-align: left; }
    .w-list li {
      display: flex; align-items: center; gap: 10px;
      padding: 6px 2px; font-size: 0.92rem; line-height: 1.3;
    }
    .w-list li + li { border-top: 1px solid rgba(255,255,255,0.06); }
    .w-ic {
      flex: 0 0 28px; width: 28px; height: 28px; border-radius: 999px;
      display: flex; align-items: center; justify-content: center;
      background: rgba(255,255,255,0.08); color: var(--text);
    }
    .w-ic svg { width: 16px; height: 16px; display: block; }
    .w-ic.like { color: var(--like); background: rgba(255,77,109,0.14); }
    .w-ic.nope { color: #ff8a8a; background: rgba(255,138,138,0.12); }
    .w-ic.nav { color: var(--accent); background: rgba(142,176,255,0.13); }
    .w-note { margin: 10px 2px 12px; color: var(--muted); font-size: 0.76rem; line-height: 1.35; }
    .w-start {
      width: 100%; border: none; border-radius: 999px;
      padding: 0.8rem 1rem; font: inherit; font-weight: 700; font-size: 1rem;
      background: var(--text); color: #05060a; cursor: pointer;
    }
    .w-start:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
    @media (max-height: 700px) {
      .welcome-panel { padding: 14px 16px 14px; }
      .welcome h1 { font-size: 1.4rem; }
      .w-demo { height: 66px; margin: 8px auto 4px; }
      .w-list li { padding: 5px 2px; }
      .w-note { margin: 8px 2px 10px; }
    }