.title-screen{background:linear-gradient(90deg,#08110ff2,#08110f55),url('assets/chapter02/scenes.png') left top/200% 200%}.title-copy h1{font-size:clamp(48px,7vw,110px)}.c2-art{position:absolute;inset:0;background-image:url('assets/chapter02/scenes.png');background-size:200% 200%;background-repeat:no-repeat}.c2-art.campus{background-position:0 0}.c2-art.club{background-position:100% 0}.c2-art.corridor{background-position:0 100%}.c2-art.archive{background-position:100% 100%}.c2-art.afternoon{filter:sepia(.3) brightness(1.15)}.c2-art.darkroom{background-image:url('assets/chapter01/darkroom.jpg');background-size:cover}.c2-art.river{background-image:url('assets/chapter01/photo-04-0617.png');background-size:cover}.c2-art.classroom{background-image:url('assets/chapter01/photo-01.jpg');background-size:cover}.c2-art.evidence-art{position:relative;inset:auto;width:100%;aspect-ratio:16/9;margin-bottom:22px}.c2-pair{display:grid;grid-template-columns:1fr 1fr;gap:24px}.c2-pair figure{margin:0}.c2-pair img,#panelBody>img{width:100%;max-height:60vh;object-fit:contain}.c2-pair figcaption{padding:12px 0;color:var(--muted)}.c2-paper{color:#302d24;background:linear-gradient(120deg,#d0c3a2,#b9ac8d);padding:clamp(20px,4vw,55px);box-shadow:0 12px 40px #0008;margin:20px auto;max-width:700px;font-family:var(--serif);border:1px solid #72684b}.c2-paper h3{font-size:26px;border-bottom:1px solid #635c4580;padding-bottom:14px}.c2-paper p{letter-spacing:.12em;line-height:2}.redacted-face{width:100px;height:130px;margin:auto;background:repeating-linear-gradient(12deg,#12140f 0 4px,#36382d 4px 6px);border-radius:40%}.redacted-face span{visibility:hidden}.film-row{display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--line)}.film-row.developing{animation:develop2 1.4s ease-in forwards;pointer-events:none}.door-diagram{display:flex;gap:3%;padding:8% 4% 0;height:100%;min-height:150px;border-bottom:2px solid currentColor}.diagram-door{border:2px solid currentColor;flex:1;position:relative;min-width:0}.diagram-door span{font:12px var(--sans);position:absolute;bottom:8px;left:35%}.alignment-board{position:relative;height:38vh;min-height:230px;overflow:hidden;background:#090f0d;border:1px solid var(--line);touch-action:none;cursor:grab;margin-bottom:20px}.alignment-board:active{cursor:grabbing}.alignment-base,.alignment-sheet{position:absolute;inset:12%;color:#b9c4b8}.alignment-sheet{color:#d67764;opacity:.7;transform-origin:50% 50%}.register-mark{position:absolute;width:16px;height:16px;border:1px solid currentColor;transform:translate(-50%,-50%)}.register-mark:after{content:'+';position:absolute;top:-7px;left:1px}.alignment-board+.input{width:100%}input[type=range]{width:100%;accent-color:#ba6250}.wallet-photo{margin:auto;max-width:320px;padding:16px 16px 45px;background:#cbc3a8;transform:rotate(-2deg)}.wallet-photo img{width:100%;max-height:45vh;object-fit:cover;object-position:top}.circled-day{display:inline-block;position:relative;color:#c96d5c}.circled-day:after{content:'';position:absolute;inset:0 -15%;border:3px solid #a3352b;border-radius:50%;transform:rotate(-18deg);animation:circle2 1.4s ease-out}.shuttered{filter:brightness(3)}#scenePortrait{mask-image:linear-gradient(to bottom,#000 80%,transparent),linear-gradient(to right,transparent,#000 12%,#000 88%,transparent);mask-composite:intersect}#panelBody>button{margin:10px 10px 10px 0}.bottom-hud{z-index:15}.end-screen h1{font-family:var(--serif)}@keyframes develop2{from{filter:brightness(.1) sepia(1)}to{filter:brightness(1)}}@keyframes circle2{from{opacity:0;transform:rotate(-45deg) scale(1.2)}to{opacity:1;transform:rotate(-18deg)}}@media(prefers-reduced-motion:reduce){*{animation:none!important}}@media(max-width:800px){.c2-pair{gap:12px}.c2-paper{padding:16px}.film-row{font-size:13px}}

.c2-art.river,.c2-art.classroom,.c2-art.oldphoto,.c2-art.clubphoto{background-image:url(assets/chapter02/memories.png);background-size:200% 200%}.c2-art.river{background-position:left top}.c2-art.classroom{background-position:right top}.c2-art.oldphoto{background-position:left bottom}.c2-art.clubphoto{background-position:right bottom}.windows .diagram-door{height:60%;margin-top:8%;background:linear-gradient(90deg,transparent 48%,currentColor 49% 51%,transparent 52%)}
/* v1.0.2: registered silhouette masks; image and mask share the same crop. */
#scenePortrait{mask-image:url('assets/chapter02/chen-mask.png');mask-mode:luminance;mask-size:cover;mask-position:center top;mask-repeat:no-repeat;mask-composite:add}
#scenePortrait[data-character="xu"]{mask-image:url('assets/chapter02/xu-mask.png')}
.scene-xu{position:absolute;left:66%;top:31%;width:16%;height:51%;object-fit:contain;object-position:center;z-index:2;pointer-events:none;mask-image:url('assets/chapter02/xu-standing-mask.png');mask-mode:luminance;mask-size:contain;mask-repeat:no-repeat;mask-position:center;filter:drop-shadow(3px 5px 3px #0008) brightness(.85)}
.scene-xu.night{filter:brightness(.43) saturate(.7) drop-shadow(3px 5px 3px #0008)}
.c2-art.night.campus,.c2-art.night.club,.c2-art.night.corridor,.c2-art.night.archive{background-image:url('assets/chapter02/scenes-night.png');background-size:200% 200%}
#stage[data-phase="night"] #hotspots{--red:#a75e54}
.old-photo-card{margin:0 auto 20px;text-align:center;max-width:1000px}.old-photo-card>img{display:block;width:100%;max-height:53vh;object-fit:contain}.old-photo-card>h3{font-size:30px}.old-photo-card>p{padding:30px}
#panel[data-kind="datePuzzle"]{max-height:84vh}#panel[data-kind="datePuzzle"] .c2-paper{margin:0;width:100%;padding:28px 32px}#panel[data-kind="datePuzzle"] .c2-pair{align-items:stretch}#panel[data-kind="datePuzzle"] .c2-paper p{margin:12px 0}#panel[data-kind="datePuzzle"] .c2-paper h3{margin-bottom:18px}.missing-document{border:1px dashed #9d9776;padding:28px 32px;color:#c8c3b0;min-height:220px}.missing-document h3{font-size:20px}.puzzle-actions{position:sticky;bottom:-20px;background:#0b1310f5;padding:14px 0;display:flex;gap:16px;z-index:2}.puzzle-actions button{min-width:150px}.date-feedback{margin:20px 0 0}.missing-document button{border-color:#b7ad82}.c2-paper{background:repeating-linear-gradient(0deg,transparent 0 33px,#5c543110 34px),linear-gradient(120deg,#d0c3a2,#b9ac8d)}

/* Self-contained SVG owns the matte: no external CSS mask fetch, including file:// play. */
#scenePortrait,#scenePortrait[data-character="xu"],.scene-xu{-webkit-mask:none;mask:none;clip-path:none}
/* Chapter 02 evidence and physical interaction pass, 1.0.5. */
.scene-xu[data-scene="river"]{left:27%;top:35%;width:16%;height:43%;object-position:center bottom;filter:brightness(.62) saturate(.68) drop-shadow(0 8px 4px #000a)}
.archive-document{position:relative;margin:12px auto 24px;width:100%;max-width:760px;padding:28px 34px;color:#302b22;background:radial-gradient(ellipse at 10% 20%,#99845030,transparent 48%),linear-gradient(93deg,#c4b594,#e0d4b6 48%,#c5b793);box-shadow:0 8px 28px #0008;border:1px solid #817354;font-family:var(--serif)}
.document-kicker{font-size:12px;letter-spacing:.2em;border-bottom:3px double #75684e;padding-bottom:10px}.archive-document h3{font-size:clamp(24px,2.5vw,38px);letter-spacing:.12em;margin:22px 0 12px}.document-date{font-size:15px;border-bottom:1px solid #796b4b;padding-bottom:12px}.file-fields{display:grid;grid-template-columns:7em 1fr;border-top:1px solid #89795b;margin:26px 0}.file-fields dt,.file-fields dd{padding:12px;margin:0;border-bottom:1px solid #89795b}.file-fields dt{border-right:1px solid #89795b;color:#675940}.file-stamp{display:block;width:max-content;border:3px double #953e32;color:#953e32;transform:rotate(-9deg);padding:6px 20px;margin:10px 10px 10px auto;letter-spacing:.3em;font-size:21px}.newsprint h3{font-weight:900;border-bottom:5px double #5a513d;padding-bottom:18px}.news-lead{font-size:22px;line-height:1.8}.newsprint>p:not(.document-date){line-height:2;text-align:justify}.document-notes{margin-top:22px;border-top:1px dashed #8e8060;padding-top:12px;font-size:14px}.document-notes summary{cursor:pointer}.document-notes p{line-height:1.8}
.photo-frame{position:relative;aspect-ratio:16/9;overflow:hidden;border:8px solid #c5bfa5;background:#151b17;box-shadow:0 8px 28px #0009}.photo-scene{position:absolute;inset:0;transition:transform .6s ease;filter:sepia(.18) saturate(.65)}.photo-frame.zoomed .photo-scene{transform:scale(2.5)}.photo-caption{font-size:16px;line-height:1.8;color:#d2cbb5;margin:14px 0}.photo-tools{display:flex;flex-wrap:wrap;gap:12px}.photo-anomaly{position:absolute;transform:translate(-50%,-50%);border:1px solid #e4d3a560;background:#14231d55;color:#e5dec9;padding:8px 12px;text-shadow:0 0 4px #eee8;font-family:var(--serif);font-size:clamp(12px,1.5vw,22px);cursor:zoom-in}.photo-anomaly.notice{color:#c4d3ba99;transform:translate(-50%,-50%) rotate(-7deg);text-shadow:0 0 3px #d1dbc7}.photo-anomaly.corridor{width:5%;height:34%;background:linear-gradient(90deg,#26332c,#0b1310 16% 85%,#414238);border:3px solid #536054;transform:translate(-50%,-50%) skewY(-9deg);font-size:12px;color:#d8cfba}.photo-anomaly.locker{font-size:35px;background:transparent;border:0;color:#cabf9c}.photo-anomaly:focus-visible,.photo-anomaly:hover{outline:2px solid #c09a77;outline-offset:4px}.photo-tools button{font-size:14px}.develop-tray{padding:18px;border:12px ridge #47413a;background:radial-gradient(ellipse,#2d1814,#100907);box-shadow:inset 0 0 35px #000}.develop-tray .photo-frame{filter:brightness(.08) sepia(.8) blur(3px);transition:filter 1.5s}.develop-tray.image-emerging .photo-frame{filter:brightness(.9) sepia(.2) blur(0)}.develop-tray.detail-emerging .photo-anomaly{animation:detail-appear .9s both}.develop-status{color:#d4c1a8}.chase-viewport{position:relative;aspect-ratio:16/7;overflow:hidden;background:#070b08}.chase-view{transition:transform .14s ease;filter:brightness(.65)}.chase-viewport:after{content:'';position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse,transparent 35%,#050805bd)}.run-button{display:block;margin:16px auto!important;min-width:220px}.run-status{font-size:18px;min-height:2em}.chase-junction{display:flex;gap:12px;flex-wrap:wrap;margin:14px 0}.chase-junction[hidden]{display:none}#panelBody progress{display:block;width:100%;height:9px;accent-color:#ac624c}.chase-junction button{flex:1}.photo-tools[hidden]{display:none}@keyframes detail-appear{from{opacity:0;filter:blur(6px)}to{opacity:1;filter:blur(0)}}@media(prefers-reduced-motion:reduce){.photo-scene,.chase-view,.develop-tray .photo-frame{transition:none}.chase-view{transform:none!important}}
.viewfinder .photo-frame:after{content:'';position:absolute;inset:12%;border:1px solid #ede8cc8c;box-shadow:0 0 0 80px #0002;pointer-events:none}.document-exposure>.archive-document,.document-exposure>.c2-paper{position:absolute;inset:4% 17%;max-width:none;overflow:hidden;margin:0;transform:rotate(-2deg);font-size:14px}.document-exposure .photo-anomaly{z-index:3}.document-exposure .document-notes{display:none}.photo-anomaly.corridor:after{content:'';position:absolute;right:10%;top:60%;width:6px;height:12px;border-radius:2px;background:#867853;box-shadow:0 0 5px #222}.photo-frame.zoomed .photo-anomaly{cursor:zoom-out}
/* v1.0.6: props are visible outside observation mode; hotspots follow the art. */
.c2-art.classroom{background-image:url('assets/chapter02/classroom-populated-atlas.png')}
.hotspot.physical-photo{background:#bbb196;box-shadow:2px 4px 6px #0007;border:3px solid #b2a88a;transform:rotate(-2deg);z-index:2}.hotspot.physical-photo img{width:100%;height:100%;object-fit:cover}.hotspot.physical-photo:before{position:absolute;z-index:3}.hotspot.physical-photo span{z-index:4}.hotspot.physical-roster{transform:skewX(-8deg) rotate(-8deg);z-index:2}.roster-prop{display:block;width:100%;height:100%;padding:4%;color:#524735;font:clamp(7px,.8vw,13px) var(--serif);background:repeating-linear-gradient(0deg,transparent 0 7px,#776c5140 8px),#c5bb99;border:3px double #9b9073;box-shadow:2px 5px 5px #0006}.wallet-prop{display:block;width:85%;height:65%;border:3px double #786342;border-radius:5px;transform:rotate(-12deg);background:linear-gradient(150deg,#6b553a,#2c241c);box-shadow:3px 7px 6px #0009}.hotspot.physical-wallet{z-index:2}.hotspot.physical-wallet:before,.hotspot.physical-roster:before{position:absolute;z-index:3}.developed-corridor{background-image:url('assets/chapter02/corridor-developed-atlas.png');pointer-events:none}.photo-anomaly.corridor{width:11%;height:64%;background:transparent;border:0;transform:translate(-50%,-50%);box-shadow:none}.photo-anomaly.corridor:after{display:none}.photo-anomaly.corridor:hover,.photo-anomaly.corridor:focus-visible{outline:1px solid #d4bb8980}.hint-list{max-width:680px;margin:24px auto}.hint-list p{border-left:2px solid #9d6550;padding:12px 22px;line-height:1.9}.photo-inspection{max-width:min(100%,1000px);margin:auto}.develop-tray{max-width:1040px;margin:auto}.photo-frame{width:min(100%,calc(56vh * 16 / 9));margin:auto}.photo-tools{position:relative}.case-tools #hint{color:#ceb697}
/* 1.0.7: classroom props share scene light and surface perspective. */
.hotspot.physical-photo{border:2px solid #94876b;background:#9c8c6e;padding:3px;box-shadow:1px 2px 2px #0007;transform:rotate(-1.3deg);filter:brightness(.78) sepia(.22) saturate(.58)}.hotspot.physical-photo[data-clue="club_photo"]{transform:rotate(1.6deg)}.hotspot.physical-photo:after{content:'';position:absolute;top:-3px;left:48%;width:4px;height:4px;border-radius:50%;background:#9c7d5b;box-shadow:0 1px 2px #000}.hotspot.physical-photo img{opacity:.92}.hotspot.physical-roster{transform:perspective(350px) rotateX(48deg) rotateZ(-7deg);transform-origin:center;filter:brightness(.85) sepia(.18)}.roster-prop{font-size:clamp(5px,.6vw,10px);border:1px solid #a49778;background:repeating-linear-gradient(0deg,transparent 0 4px,#756b4c35 5px),linear-gradient(120deg,#c4b694,#a89c7a);box-shadow:1px 2px 2px #0006}.wallet-prop{width:95%;height:80%;border:1px solid #796040;border-radius:3px;transform:perspective(250px) rotateX(45deg) rotateZ(-9deg);background:repeating-linear-gradient(8deg,#56432f14 0 1px,transparent 2px 4px),linear-gradient(160deg,#685037,#30271e);box-shadow:1px 3px 2px #0009}.hotspot.physical-photo:hover,.hotspot.physical-roster:hover,.hotspot.physical-wallet:hover{outline:1px solid #c0ab7660;outline-offset:3px}.develop-actions{position:sticky;bottom:-28px;padding:12px 0;background:#0b1310f5;z-index:4;display:flex;justify-content:flex-end}