/* tactile paper and environmental background */
.ambient{background:linear-gradient(rgba(15,12,10,.76),rgba(15,12,10,.84)),url('.codex/generated-images/20260928T183649904Z-2e38fbb1/image.png') center/cover no-repeat fixed!important}
.ambient:before{background:linear-gradient(125deg,transparent 34%,rgba(241,217,130,.055) 47%,transparent 58%)}
.grain{opacity:.045}.dust{opacity:.055}
.paper{isolation:isolate;border-radius:2px;filter:drop-shadow(2px 4px 2px rgba(0,0,0,.24)) drop-shadow(-2px 12px 12px rgba(0,0,0,.2));clip-path:polygon(0.8% 1.2%,2.8% .4%,6% 1%,10% .4%,16% 1.1%,23% .5%,31% 1.1%,39% .4%,47% 1%,55% .5%,64% 1.2%,72% .3%,80% .9%,88% .4%,97% 1.5%,99.4% 5%,98.8% 14%,99.7% 23%,98.9% 32%,99.6% 42%,98.8% 53%,99.7% 63%,98.9% 74%,99.5% 84%,98.4% 94%,95% 99%,87% 98.5%,79% 99.4%,69% 98.7%,60% 99.5%,50% 98.7%,41% 99.3%,32% 98.5%,23% 99.4%,14% 98.6%,5% 99%,1% 95%,1.5% 87%,.5% 76%,1.2% 66%,.4% 56%,1.1% 46%,.4% 35%,1.2% 25%,.5% 15%)}
.paper:after{content:"";position:absolute;inset:0;z-index:-1;opacity:.32;pointer-events:none;background:linear-gradient(102deg,transparent 0 17%,rgba(74,49,24,.2) 18%,transparent 22%),linear-gradient(78deg,transparent 0 61%,rgba(255,239,185,.22) 63%,transparent 67%),radial-gradient(ellipse at 5% 10%,rgba(47,30,17,.26),transparent 13%),radial-gradient(ellipse at 96% 89%,rgba(255,244,192,.28),transparent 15%);mix-blend-mode:multiply}
.paper-head,.paper-grid,.reason-toggle,.reason{position:relative;z-index:1}.cover{box-shadow:inset 0 0 36px rgba(0,0,0,.38),2px 3px 0 rgba(56,38,23,.15)}
.night-keeper-memory{margin:0 0 15px;padding-left:13px;border-left:1px solid rgba(241,217,130,.5);color:#cbbd9e;font-size:12px;line-height:1.8;max-width:650px}
@media (prefers-reduced-motion:reduce){.ambient:before,.dust,.torch{animation:none!important}.torch{transition:none!important}}
/* paper object feedback */
.paper{--paper-tilt:0deg;--paper-lift:0px;transition:transform .45s cubic-bezier(.2,.8,.2,1),filter .45s ease,box-shadow .45s ease;background-image:linear-gradient(112deg,rgba(255,245,193,.08),transparent 33%,rgba(53,31,17,.1) 78%),linear-gradient(125deg,#b39c6b,#d0bb83)}
.hero-paper{transform:rotate(calc(-.6deg + var(--paper-tilt))) translateY(var(--paper-lift))}.small-paper{transform:rotate(calc(.7deg + var(--paper-tilt))) translateY(var(--paper-lift))}.paper-three{transform:rotate(calc(-.8deg + var(--paper-tilt))) translateY(var(--paper-lift))}
.paper:hover{--paper-tilt:0deg;--paper-lift:1px;filter:drop-shadow(1px 2px 1px rgba(0,0,0,.22)) drop-shadow(-1px 7px 8px rgba(0,0,0,.16))}.paper.selected{--paper-lift:-2px;filter:drop-shadow(0 0 10px rgba(241,217,130,.2)) drop-shadow(0 7px 12px rgba(0,0,0,.22));box-shadow:inset 0 0 0 1px rgba(241,217,130,.5),var(--shadow)}
.paper.selected:before{opacity:.28}.paper.selected:after{opacity:.5}.paper.selected .paper-head:after{content:'已选中';color:#603327;font:10px 'DM Mono';margin-left:10px}.paper.flip-open{perspective:900px}.paper.flip-open .paper-grid{animation:paperFlip .55s cubic-bezier(.2,.8,.2,1)}
.reason{transform-origin:top;perspective:900px}.reason.open{animation:reasonTurn .45s ease both}.paper:focus-visible,.session:focus-visible,.quiet-btn:focus-visible,.send-btn:focus-visible,.new-session:focus-visible,.reason-toggle:focus-visible{outline:2px solid var(--yellow);outline-offset:3px}
.ambient{transition:background 2s ease}.ambient.theme-deep{background:linear-gradient(rgba(8,18,20,.76),rgba(15,12,10,.84)),url('.codex/generated-images/20260928T183649904Z-2e38fbb1/image.png') center/cover no-repeat fixed!important}.ambient.theme-fire{background:linear-gradient(rgba(50,26,12,.72),rgba(15,12,10,.84)),url('.codex/generated-images/20260928T183649904Z-2e38fbb1/image.png') center/cover no-repeat fixed!important}.ambient.theme-space{background:linear-gradient(rgba(20,28,35,.78),rgba(15,12,10,.86)),url('.codex/generated-images/20260928T183649904Z-2e38fbb1/image.png') center/cover no-repeat fixed!important}.ambient.theme-garden{background:linear-gradient(rgba(34,40,22,.74),rgba(15,12,10,.84)),url('.codex/generated-images/20260928T183649904Z-2e38fbb1/image.png') center/cover no-repeat fixed!important}.ambient.theme-deep:after{background:radial-gradient(ellipse at 78% 25%,rgba(57,151,160,.13),transparent 35%),rgba(17,15,13,.16)}.ambient.theme-fire:after{background:radial-gradient(ellipse at 72% 28%,rgba(214,133,43,.16),transparent 30%),rgba(17,15,13,.16)}.ambient.theme-space:after{background:radial-gradient(ellipse at 78% 24%,rgba(135,165,190,.13),transparent 32%),rgba(17,15,13,.16)}.ambient.theme-garden:after{background:radial-gradient(ellipse at 70% 30%,rgba(147,154,79,.13),transparent 33%),rgba(17,15,13,.16)}
@keyframes paperFlip{0%{transform:perspective(900px) rotateX(0)}45%{transform:perspective(900px) rotateX(-2deg) translateY(-3px)}100%{transform:perspective(900px) rotateX(0)}}@keyframes reasonTurn{from{opacity:0;transform:rotateX(-8deg)}to{opacity:1;transform:rotateX(0)}}