/* 日记 · 交换日记 (js/apps/diary-exchange-ui.js). Ported from _handoff/diary-exchange/preview.html onto the diary's own palette:
   the --dy-* variables are set inline on #dy by dyApplyTheme (.night = the diary's 夜间模式); --dyx-* only adds the paper of a page.
   Every class is dyx-*, nothing here touches an existing diary rule. */
.dy{--dyx-paper:#fcfbff;--dyx-mute:#6b6580;--dyx-rule:rgba(140,128,171,.15);--dyx-margin:rgba(207,147,168,.34);--dyx-shd:rgba(70,55,110,.25);--dyx-clip:#8f8aa3}
.dy.night{--dyx-paper:#24212c;--dyx-mute:#a8a2b8;--dyx-rule:rgba(170,175,220,.1);--dyx-margin:rgba(230,140,160,.22);--dyx-shd:rgba(0,0,0,.55);--dyx-clip:#a39cb3}

/* ── 首页书架 ── */
.dyx-sec{display:flex;justify-content:space-between;align-items:baseline;font-size:11.5px;color:var(--dy-ink2);letter-spacing:1px;padding:6px 6px 0}
.dyx-sec small{font-size:11px;color:var(--dy-acc);letter-spacing:0}
.dyx-shelfw{position:relative;margin:2px -16px 0;padding:0 16px;overflow-x:auto;scrollbar-width:none;scroll-snap-type:x proximity;-webkit-mask:linear-gradient(90deg,#000 88%,transparent);mask:linear-gradient(90deg,#000 88%,transparent)}
.dyx-shelfw::-webkit-scrollbar{display:none}
.dyx-bshelf{position:relative;padding:26px 18px 0 6px;display:flex;gap:8px;align-items:flex-end;height:162px;width:max-content;min-width:100%}
.dyx-bshelf::after{content:"";position:absolute;left:0;right:0;bottom:0;height:8px;border-radius:4px;background:linear-gradient(180deg,color-mix(in srgb,var(--dy-acc) 30%,var(--dy-card)),color-mix(in srgb,var(--dy-acc) 45%,var(--dy-card)));box-shadow:0 6px 10px -6px var(--dyx-shd)}
.dyx-spine{position:relative;flex:none;scroll-snap-align:start;width:46px;height:var(--h);margin-bottom:8px;padding:10px 0 0;border:0;border-radius:4px 4px 2px 2px;cursor:pointer;
  background:linear-gradient(90deg,var(--tone),var(--tone) 40%,color-mix(in srgb,var(--tone) 70%,#fff));display:flex;flex-direction:column;align-items:center;gap:6px;color:#2c2838!important;
  box-shadow:inset -3px 0 0 rgba(0,0,0,.08),inset 2px 0 0 rgba(255,255,255,.25);transition:transform .3s cubic-bezier(.3,1.6,.5,1),background .3s}
.dyx-spine:active{transform:translateY(-6px)}
.dyx-spine .dy-av{width:26px;height:26px;font-size:11px;box-shadow:0 0 0 1.5px rgba(255,255,255,.8)}
.dyx-spine b{writing-mode:vertical-rl;font-size:13px;letter-spacing:4px;font-weight:600;max-height:calc(var(--h) - 76px);overflow:hidden;text-overflow:ellipsis}
.dyx-spine small{position:absolute;bottom:6px;font-size:9px;color:#2c2838}
.dyx-spine .env{position:absolute;bottom:20px;width:16px;height:11px;border:1.4px dashed rgba(44,40,56,.8);border-radius:2px}
.dyx-spine .lt{position:absolute;top:-17px;left:6px;width:34px;height:26px;border-radius:2px;background:var(--dyx-paper);border-top:2.5px solid var(--tone);box-shadow:0 2px 4px rgba(40,30,70,.2);transform:rotate(-6deg);z-index:-1;animation:dyxPeek 2.4s ease-in-out infinite}
.dyx-spine .lt::after{content:"";position:absolute;left:5px;right:5px;top:6px;height:1px;background:var(--dy-line);box-shadow:0 4px 0 var(--dy-line),0 8px 0 var(--dy-line)}
@keyframes dyxPeek{0%,100%{transform:rotate(-6deg) translateY(0)}50%{transform:rotate(-6deg) translateY(-3px)}}
.dy-tag.x{background:color-mix(in srgb,var(--dy-acc) 16%,transparent);color:var(--dy-acc)}

/* ── 写日记时 / 已有日记：选角色 ── */
.dyx-put{margin:14px 0 4px;padding:12px 14px 6px;border-radius:18px;white-space:normal}
.dyx-put h6{margin:0;font-size:13px;font-weight:600}
.dyx-put p{margin:2px 0 8px;font-size:11.5px;line-height:1.5;color:var(--dy-ink2)}
.dyx-who{display:flex;gap:8px;flex-wrap:wrap;padding:2px 0 8px}
.dyx-who button,.dyx-picks button{display:inline-flex;align-items:center;gap:6px;padding:4px 10px 4px 4px;border-radius:999px;border:1px solid var(--dy-line);font-size:12px;color:var(--dy-ink2)!important;cursor:pointer;background:transparent;transition:background .2s}
.dyx-who .dy-av,.dyx-picks .dy-av{width:22px;height:22px;font-size:10px;box-shadow:none}
.dyx-who button[aria-pressed="true"],.dyx-picks button[aria-pressed="true"]{background:color-mix(in srgb,var(--dy-acc) 18%,transparent);border-color:transparent;color:var(--dy-ink)!important}
.dyx-who button:disabled,.dyx-picks button:disabled{opacity:.7;cursor:default}
.dyx-had{margin:0 0 8px;font-size:11.5px;color:var(--dy-acc)}
.dyx-picks{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:12px 0 4px}
.dyx-none{margin:8px 0;font-size:12px;color:var(--dy-ink2)}

/* ── 一本交换日记 ── */
.dyx-view .dyx-top{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:12px 14px 8px}
.dyx-who2{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--dy-ink2);min-width:0}
.dyx-who2 .dy-av{width:26px;height:26px;font-size:11px}
.dyx-who2 span.nm{max-width:7em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dyx-ttl{display:flex;justify-content:space-between;align-items:baseline;padding:2px 22px 10px}
.dyx-ttl h3{margin:0;font-family:var(--font-display);font-size:22px;font-weight:700}
.dyx-ttl span{font-size:12px;color:var(--dy-ink2)}
.dyx-body{flex:1;overflow-y:auto;overflow-x:hidden;scrollbar-width:none;padding-bottom:calc(20px + env(safe-area-inset-bottom,0px))}
.dyx-body::-webkit-scrollbar{display:none}
.dyx-stage{position:relative;perspective:1100px;perspective-origin:30% 50%;padding:0 14px;touch-action:pan-y;user-select:none;-webkit-user-select:none}
.dyx-stage .cast{position:absolute;inset:0 14px;pointer-events:none;border-radius:5px 20px 20px 5px;background:linear-gradient(90deg,rgba(40,30,70,.28),rgba(40,30,70,0) 60%);opacity:var(--c,0)}
.dyx-leaf{position:absolute;top:0;left:14px;right:14px;transform-origin:left center;transform-style:preserve-3d;will-change:transform}
.dyx-leaf .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:5px 20px 20px 5px;overflow:hidden}
.dyx-leaf .face .dyx-pg{min-height:100%;box-shadow:none}
.dyx-leaf .back{transform:rotateY(180deg);background:var(--dyx-paper);background-image:repeating-linear-gradient(transparent 0 29px,color-mix(in srgb,var(--dyx-rule) 55%,transparent) 29px 30px);border-radius:20px 5px 5px 20px}
.dyx-leaf .shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(40,30,70,0) 30%,rgba(40,30,70,.22));opacity:var(--k,0)}
.dyx-leaf .back .shade{background:linear-gradient(270deg,rgba(40,30,70,.04) 20%,rgba(40,30,70,.3))}
.dyx-pg{position:relative;border-radius:5px 20px 20px 5px;padding:20px 18px 18px 34px;min-height:520px;background:var(--dyx-paper);color:var(--dy-ink);
  background-image:linear-gradient(90deg,transparent 22px,var(--dyx-margin) 22px 23.5px,transparent 23.5px),repeating-linear-gradient(transparent 0 29px,var(--dyx-rule) 29px 30px);
  box-shadow:0 2px 0 -1px var(--dyx-paper),0 3px 1px -1px rgba(60,50,90,.1),0 5px 0 -2px var(--dyx-paper),0 6px 1px -2px rgba(60,50,90,.1),0 24px 34px -22px var(--dyx-shd)}
.dyx-pg header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}
.dyx-pg header b{font-size:19px;font-weight:700;color:var(--dy-acc)}
.dyx-pg header span{font-size:11.5px;color:var(--dyx-mute);letter-spacing:.5px}
.dyx-lab{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--dyx-mute);margin:6px 0 2px}
.dyx-lab .dy-av{width:20px;height:20px;font-size:9.5px;box-shadow:none}
.dyx-lab .dy-tag{margin-left:4px;color:var(--dyx-mute)}
.dyx-mine{margin:2px 0 0;font-size:14px;line-height:30px;color:var(--dy-ink);white-space:pre-wrap;word-break:break-word}
.dyx-letter{position:relative;margin:18px -4px 4px 0;padding:14px 14px 12px;border-radius:4px;background:color-mix(in srgb,var(--tone) 9%,var(--dy-card));transform:rotate(-1deg);
  box-shadow:0 12px 20px -12px var(--dyx-shd);border-top:3px solid color-mix(in srgb,var(--tone) 60%,transparent)}
.dyx-letter .clip{position:absolute;right:22px;top:-14px;width:18px;height:36px;border-radius:9px;border:2px solid var(--dyx-clip);border-bottom-color:transparent;transform:rotate(10deg)}
.dyx-letter .clip::after{content:"";position:absolute;left:3px;top:6px;width:8px;height:22px;border-radius:5px;border:2px solid var(--dyx-clip);border-top-color:transparent}
.dyx-letter p{margin:6px 0 0;font-size:14px;line-height:1.85;color:var(--dy-ink);white-space:pre-wrap;word-break:break-word}
.dyx-sign{display:block;text-align:right;margin-top:8px;font-size:13px;color:var(--dyx-mute)}
.dyx-await{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:20px;padding:22px 12px;border-radius:12px;border:1.5px dashed var(--dy-acc2);font-size:12.5px;color:var(--dyx-mute);text-align:center}
.dyx-await .dots{display:inline-flex;gap:3px}
.dyx-await .dots i{width:5px;height:5px;border-radius:50%;background:var(--dy-acc);animation:dyxAw 1.2s infinite both}
.dyx-await .dots i:nth-child(2){animation-delay:.15s}.dyx-await .dots i:nth-child(3){animation-delay:.3s}
@keyframes dyxAw{0%,80%,100%{opacity:.25}40%{opacity:1}}
.dyx-await.fail{flex-direction:column;gap:10px;border-color:color-mix(in srgb,var(--dy-her) 60%,transparent)}
.dyx-nav{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:12px;font-size:12.5px;color:var(--dy-ink2)}
.dyx-nav .dy-circ[disabled]{opacity:.3}
.dyx-nav .fwd svg{transform:scaleX(-1)}
.dyx-empty{padding:40px 24px;text-align:center;font-size:13px;color:var(--dy-ink2)}

/* ── 取消这一页 / 书的菜单：居中弹窗用的是日记自己的 .dy-modal，这里只补行 ── */
.dyx-menu-sub{margin:4px 0 0;font-size:11.5px;color:var(--dy-ink2)}
@media (prefers-reduced-motion:reduce){.dyx-spine .lt,.dyx-await .dots i{animation:none}}

/* ═════════ D3b ═════════ */
/* the page that peeks out of a book with a new reply: in the dark it is a lighter sheet with a ring and its lines, so it reads as a corner of paper like in the light */
.dy.night .dyx-spine .lt{background:#4d4864;border-top-color:var(--tone);box-shadow:0 0 0 1px rgba(255,255,255,.2),0 3px 6px rgba(0,0,0,.5)}
.dy.night .dyx-spine .lt::after{background:rgba(255,255,255,.4);box-shadow:0 4px 0 rgba(255,255,255,.4),0 8px 0 rgba(255,255,255,.4)}

/* 书的颜色 */
.dyx-tprev{display:flex;justify-content:center;padding:10px 0 12px}
.dyx-tprev .dyx-spine{margin:0;cursor:default}
.dyx-tsws{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;justify-items:center;margin-bottom:4px}
.dyx-tsw{width:32px;height:32px;padding:0;border:0;border-radius:50%;cursor:pointer;background:var(--sw);box-shadow:inset 0 0 0 2px rgba(255,255,255,.6);transition:transform .2s cubic-bezier(.3,1.6,.5,1)}
.dyx-tsw.on{box-shadow:0 0 0 2px var(--dy-card),0 0 0 4px var(--sw)}
.dyx-tsw:active{transform:scale(.9)}
.dyx-tsw.auto{grid-column:span 2;width:auto;height:32px;border-radius:999px;display:inline-flex;align-items:center;gap:6px;padding:0 10px 0 3px;background:color-mix(in srgb,var(--sw) 25%,var(--dy-card));color:var(--dy-ink)!important;box-shadow:inset 0 0 0 1px var(--dy-line)}
.dyx-tsw.auto.on{box-shadow:0 0 0 2px var(--sw)}
.dyx-tsw.auto .dy-av{width:26px;height:26px;font-size:10.5px;box-shadow:none}
.dyx-tsw.auto small{font-size:11.5px;color:var(--dy-ink);white-space:nowrap}

/* 批注: a sentence of the reply can be tapped; a note sits under its sentence */
.dyx-rt{margin:6px 0 0;font-size:14px;line-height:1.85;color:var(--dy-ink);white-space:normal;word-break:break-word}
.dyx-s{display:inline;padding:0;margin:0;border:0;background:none;font:inherit;line-height:inherit;color:inherit!important;text-align:left;cursor:pointer;border-radius:3px;-webkit-tap-highlight-color:transparent}
.dyx-s:active{background:var(--dy-soft)}
.dyx-s.has{background:linear-gradient(transparent 62%,color-mix(in srgb,var(--dy-her) 38%,transparent) 62%)}
.dyx-note{display:flex;gap:8px;align-items:baseline;width:calc(100% - 22px);margin:2px 0 6px 22px;padding:5px 10px;border:0;border-radius:4px 12px 12px 12px;background:color-mix(in srgb,var(--dy-her) 17%,transparent);font:inherit;font-size:12.5px;line-height:1.55;text-align:left;color:var(--dy-ink)!important;transform:rotate(-.6deg);cursor:pointer;animation:dyxStick .4s cubic-bezier(.3,1.5,.5,1) both}
@keyframes dyxStick{from{opacity:0;transform:rotate(-4deg) scale(.9)}}
.dyx-note small{flex:none;font-size:10px;color:var(--dy-ink2);font-weight:600}
.dyx-letter h6{margin:12px 0 0;font-size:10.5px;font-weight:600;letter-spacing:2px;color:var(--dyx-mute)}
.dyx-unsaid{font-size:13.5px;color:var(--dy-ink)}
.dyx-hint{margin:12px 22px 0;text-align:center;font-size:11.5px;color:var(--dy-ink2)}
.dyx-quote{margin:10px 0;padding:8px 10px;border-left:2px solid var(--dy-acc2);text-align:left;font-size:13px;line-height:1.6;color:var(--dy-ink2)}
.dyx-nta{display:block;width:100%;box-sizing:border-box;border:1px solid var(--dy-line);border-radius:14px;background:var(--dy-soft);padding:10px 12px;font:14px/1.6 inherit;font-family:inherit;color:var(--dy-ink);resize:none;outline:none}
.dyx-cnt{text-align:right;font-size:10.5px;color:var(--dy-ink2);margin-top:4px}
.dy-modal.wide .dyx-quote,.dy-modal.wide .dyx-nta{text-align:left}

/* 目录 */
.dyx-view .dyx-body .dyx-tsum{margin:0 20px 10px;font-size:11.5px;color:var(--dy-ink2);line-height:1.6}
.dyx-heat{margin:8px 14px 2px;padding:10px 12px 8px;border-radius:16px}
.dyx-heat .hw{display:flex;gap:6px}
.dyx-heat .hd2{display:grid;grid-template-rows:14px repeat(7,12px);row-gap:3px;font-size:9px;color:var(--dy-ink2);line-height:12px}
.dyx-heat .hg{display:flex;gap:3px;overflow-x:auto;scrollbar-width:none;flex:1}
.dyx-heat .hg::-webkit-scrollbar{display:none}
.dyx-heat .hc{display:grid;grid-template-rows:14px repeat(7,12px);row-gap:3px;flex:none}
.dyx-heat .hm{font-size:9px;color:var(--dy-ink2);white-space:nowrap;width:12px;overflow:visible}
.dyx-heat .hx{display:block;width:12px;height:12px;padding:0;border:0;border-radius:3px;position:relative;background:color-mix(in srgb,var(--dy-ink2) 14%,transparent)}
.dyx-heat .hx.out{background:transparent}
.dyx-heat .hx.on{background:var(--tone)}
.dyx-heat .hx.nt::after{content:"";position:absolute;left:50%;top:50%;width:4px;height:4px;margin:-2px 0 0 -2px;border-radius:50%;background:#fff;box-shadow:0 0 0 1px rgba(44,40,56,.35)}
.dyx-heat .hx.cur{box-shadow:0 0 0 1.5px var(--dy-card),0 0 0 3px var(--tone)}
.dyx-heat button.hx{cursor:pointer;transition:transform .15s}
.dyx-heat button.hx:active{transform:scale(.8)}
.dyx-heat .hl{display:flex;gap:12px;justify-content:flex-end;margin-top:6px;font-size:10px;color:var(--dy-ink2)}
.dyx-heat .hl span{display:inline-flex;align-items:center;gap:4px}
.dyx-heat .hl .hx{width:9px;height:9px;border-radius:2px}
.dyx-heat .hl .hx.nt::after{width:3px;height:3px;margin:-1.5px 0 0 -1.5px}
.dyx-body .yr{position:sticky;top:0;z-index:4;margin:10px 14px 0;padding:6px 10px;border-radius:10px;font-size:12px;color:var(--dy-ink2);display:flex;justify-content:space-between}
.dyx-body .mgrp{margin:8px 14px 0;border-radius:18px;overflow:hidden}
.dyx-body .mgrp>button{display:flex;align-items:center;gap:10px;width:100%;padding:11px 14px;border:0;background:none;font-size:13.5px;font-weight:600;cursor:pointer;text-align:left;color:var(--dy-ink)!important}
.dyx-body .mgrp>button span{flex:1}
.dyx-body .mgrp>button small{font-weight:400;font-size:11.5px;color:var(--dy-ink2)}
.dyx-body .mgrp>button svg{transition:transform .3s;color:var(--dy-ink2)}
.dyx-body .mgrp.open>button svg{transform:rotate(90deg)}
.dyx-body .mgrp .body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s cubic-bezier(.3,1,.4,1)}
.dyx-body .mgrp.open .body{grid-template-rows:1fr}
.dyx-body .mgrp .body>div{overflow:hidden}
.dyx-body .row{display:flex;align-items:center;gap:10px;width:100%;padding:9px 14px;border:0;border-top:1px solid var(--dy-line);background:none;text-align:left;cursor:pointer;color:var(--dy-ink)!important;transition:background .2s}
.dyx-body .row:active{background:var(--dy-soft)}
.dyx-body .row .n{flex:none;display:flex;flex-direction:column;width:44px;font-size:12px;color:var(--dy-acc);font-weight:600}
.dyx-body .row .n small{font-size:10px;color:var(--dy-ink2);font-weight:400}
.dyx-body .row .t{flex:1;min-width:0;display:flex;flex-direction:column}
.dyx-body .row .t b{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dyx-body .row .t small{font-size:10.5px;color:var(--dy-ink2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.dyx-body .row .m{flex:none;display:flex;gap:4px}
.dyx-body .row .m i{width:7px;height:7px;border-radius:50%}
.dyx-body .row .m i.a{background:var(--dy-her)}
.dyx-body .row .m i.y{background:var(--dy-acc)}
.dyx-body .row.cur{background:var(--dy-soft)}
.dyx-legend{margin:12px 22px 0;text-align:center;font-size:11px;color:var(--dy-ink2)}

/* 日记里：「已交换：…」 and the 交换日记 section of 「同一天」 */
.dy-shown.xput{color:var(--dy-acc);border-color:color-mix(in srgb,var(--dy-acc) 45%,transparent)}
.dyx-xgo{display:inline-flex;align-items:center;gap:2px;margin-top:4px;border:0;background:none;padding:0;font-size:12px;color:var(--dy-acc)!important;cursor:pointer}
.dyx-clamp{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.dyx-xrow{width:100%}