:root{color-scheme:dark;--blue: #0c648f;--blue-hot: #2f9bd6;--blue-light: #8fcbee;--blue-deep: #042a40;--night: #03060a;--line: rgb(255 255 255 / .14);--line-strong: rgb(255 255 255 / .34);--ink: #eef2f6;--muted: #a9b2bc;--paper: #f6efe3;--paper-ink: #2a2320;--paper-muted: #7a6b5f;--paper-line: rgb(90 70 55 / .22);--grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .3 0 0 0 0 .22 0 0 0 0 .15 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23g)' opacity='.42'/%3E%3C/svg%3E");--font-display: "Playfair Display", "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif;--font-serif: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif;--gutter: clamp(16px, 4vw, 56px);--credits-h: 56px;--ease: cubic-bezier(.2, .7, .25, 1);--safe-top: env(safe-area-inset-top, 0px)}*,*:before,*:after{box-sizing:border-box}[hidden]{display:none!important}html{background:var(--night);-webkit-text-size-adjust:100%}body{margin:0;min-height:100svh;color:var(--ink);font:400 15px/1.7 var(--font-serif);-webkit-font-smoothing:antialiased}body:before,body:after{content:"";position:fixed;inset:0;z-index:0;pointer-events:none}body:before{background:radial-gradient(130% 70% at 50% 118%,rgb(12 100 143 / .42),transparent 62%),radial-gradient(90% 55% at 50% -18%,rgb(47 155 214 / .14),transparent 70%),url(/assets/brand/sparks-blue.webp) center 62% / cover no-repeat}body:after{background:radial-gradient(ellipse at 50% 45%,transparent 50%,rgb(0 0 0 / .65) 100%)}.embers{position:fixed;inset:0;z-index:0;width:100%;height:100%;pointer-events:none}.app{position:relative;z-index:1;min-height:100svh;padding-bottom:var(--credits-h)}h1,h2,h3,p{margin:0}a{color:inherit}img,svg{display:block}button{font:inherit;color:inherit;touch-action:manipulation}:focus-visible{outline:2px solid var(--blue-light);outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}html[lang=en] .bilingual{display:none}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:10px 22px;border:1px solid transparent;border-radius:0;background:none;font:500 15px/1.2 var(--font-serif);letter-spacing:.04em;text-decoration:none;white-space:nowrap;cursor:pointer;transition:background-color .2s,color .2s,border-color .2s,box-shadow .2s,transform .2s}.button:disabled{opacity:.45;cursor:default;box-shadow:none}.button:active:not(:disabled){transform:translateY(1px)}.button-primary{border-color:var(--blue);background:var(--blue);color:#fff;box-shadow:0 12px 32px -12px #2f9bd699}.button-primary:hover:not(:disabled){border-color:var(--blue-hot);background:#000;color:var(--blue-hot)}.button-ghost{border-color:var(--line-strong);background:#00000059;color:var(--ink)}.button-ghost:hover:not(:disabled){border-color:#fff;background:#ffffff0f}.button-small{min-height:38px;padding:7px 16px;font-size:13px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(18px + var(--safe-top)) var(--gutter) 18px}.brand{display:inline-flex;align-items:center;gap:14px;min-width:0;text-decoration:none}.brand-logo{width:auto;height:30px}.brand-text{display:grid;padding-left:14px;border-left:1px solid var(--line-strong);line-height:1.3}.brand-name{font:500 15px/1.3 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span{width:2px;height:18%;background:currentColor;transition:height .3s var(--ease)}.sound-toggle.is-playing .sound-bars span{animation:equalizer 1.1s ease-in-out infinite}.sound-toggle.is-playing .sound-bars span:nth-child(2){animation-delay:-.35s}.sound-toggle.is-playing .sound-bars span:nth-child(3){animation-delay:-.7s}.sound-toggle.is-playing .sound-bars span:nth-child(4){animation-delay:-.15s}.intro{position:relative;display:flex;align-items:flex-end;min-height:calc(100svh - 76px - var(--credits-h));padding:0 var(--gutter) clamp(28px,7vh,72px)}.intro-bg{position:fixed;inset:0;z-index:-1;width:100%;height:100%;object-fit:cover;object-position:46% 28%}.intro:after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(180deg,rgb(3 6 10 / .6) 0%,transparent 16%),linear-gradient(180deg,transparent 34%,rgb(3 6 10 / .74) 62%,var(--night) 94%)}.intro-content{display:grid;gap:22px;width:100%;max-width:1240px;margin:0 auto}.lockup{display:grid;justify-items:start;gap:4px}.lockup-logo{width:clamp(120px,13vw,190px);height:auto;filter:drop-shadow(0 6px 22px rgb(0 0 0 / .6))}.lockup-name{margin-top:10px;font:500 clamp(30px,3.6vw,54px)/1.2 var(--font-serif);letter-spacing:.04em;text-shadow:0 2px 18px rgb(0 0 0 / .5)}.lockup-en{font:italic 400 clamp(17px,1.6vw,22px)/1.4 var(--font-display);color:var(--muted)}.intro-text{display:grid;justify-items:start}.intro-love{display:grid;gap:2px;margin-top:6px;color:#c9d1d9}.intro-love [lang=ja]{font-size:14px;letter-spacing:.06em}.intro-love [lang=en]{font:italic 400 15px/1.5 var(--font-display)}.intro-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:22px}.open-button{gap:12px;min-height:58px;padding:10px 28px 10px 22px;font-size:16px;letter-spacing:.1em;box-shadow:0 14px 34px -12px #000000d9}.open-button svg{flex:none;width:22px;height:22px}.open-label{display:grid;gap:3px;text-align:left}.open-button small{font:italic 400 12px/1.2 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auto;overflow:hidden;background:var(--line)}.progress-track span{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--blue-hot));transform:scaleX(var(--value, 0));transform-origin:left;transition:transform .4s var(--ease)}.stage{position:relative;isolation:isolate;display:flex;align-items:center;min-height:clamp(360px,calc(100svh - 300px - var(--credits-h)),820px);padding-block:clamp(18px,3vh,32px);border-block:1px solid var(--line)}.stage:before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(55% 65% at 50% 48%,rgb(200 228 255 / .07),transparent 72%)}.table{--cols: 4;--rows: 3;--gap: clamp(14px, 1.8vw, 28px);--fit-h: calc((100svh - 350px - var(--credits-h) - (var(--rows) - 1) * var(--gap)) / var(--rows));position:relative;isolation:isolate;display:flex;flex-wrap:wrap;align-content:center;justify-content:center;gap:var(--gap);width:100%;max-width:max(calc(var(--cols) * 190px + (var(--cols) - 1) * 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45%),var(--grain),var(--paper, #f3eadb);box-shadow:0 14px 30px -8px #000000bf,0 2px 4px #00000059;transform:translateY(var(--lift)) rotate(var(--angle)) scale(var(--scale));transition:transform .25s var(--ease),box-shadow .25s,filter .25s;animation:envelope-in .7s var(--ease) backwards;animation-delay:var(--delay, 0ms);cursor:pointer}.envelope.no-enter{animation:none}.envelope:before{content:"";position:absolute;inset:0;pointer-events:none;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 160 100' preserveAspectRatio='none'%3E%3Cpath d='M0 100 80 50l80 50' fill='none' stroke='%235a4632' stroke-opacity='.18' vector-effect='non-scaling-stroke'/%3E%3Cpath d='M0 0h160L80 58z' fill='%233c2819' fill-opacity='.06'/%3E%3Cpath d='M0 0 80 58 160 0' fill='none' stroke='%235a4632' stroke-opacity='.3' vector-effect='non-scaling-stroke'/%3E%3C/svg%3E") center / 100% 100% no-repeat}.envelope-seal{position:absolute;top:58%;left:50%;width:19%;aspect-ratio:1;translate:-50% -50%;border-radius:47% 53% 50% 50%/52% 48%;background:url(/assets/brand/rose-emboss.svg) center / 66% no-repeat,radial-gradient(circle at 36% 30%,#4fb3e8,var(--blue) 46%,var(--blue-deep) 100%);box-shadow:0 2px 4px #00000059,inset 0 -2px 3px #0000004d,inset 0 2px 2px #fff3}.envelope-stamp{position:absolute;top:9%;right:6%;width:14%;aspect-ratio:.84;background:radial-gradient(circle,var(--paper, #f3eadb) 1.1px,transparent 1.35px) 0 0 / 4px 4px,#fbf8f1;box-shadow:0 1px 2px #0000002e}.envelope-stamp:after{content:"";position:absolute;inset:3px;border:1px solid rgb(60 40 30 / .28);background:url(/assets/brand/rose-line.svg) center / 76% no-repeat,#fbf8f1}.envelope-postmark{position:absolute;top:12%;right:14%;width:13%;aspect-ratio:1;border:1.5px solid rgb(30 34 60 / .3);border-radius:50%;rotate:-14deg}.envelope-postmark:after{content:"";position:absolute;top:28%;right:88%;width:120%;height:44%;background:repeating-linear-gradient(180deg,rgb(30 34 60 / .26) 0 1px,transparent 1px 4px);-webkit-mask:linear-gradient(90deg,transparent,#000 60%);mask:linear-gradient(90deg,transparent,#000 60%)}.envelope-from{position:absolute;right:7%;bottom:9%;left:7%;display:flex;align-items:baseline;gap:6px;min-width:0;font:italic 500 clamp(12px,.95vw,15px)/1.3 var(--font-display)}.envelope-flag{flex:none;align-self:center;width:18px;height:auto;aspect-ratio:4 / 3;border-radius:2px;box-shadow:0 0 0 1px #0000001f}.envelope-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.envelope-read{position:absolute;top:9%;left:7%;font:600 11px/1 var(--font-serif);letter-spacing:.04em;color:var(--paper-muted)}.envelope.is-read{filter:saturate(.4) brightness(.86)}.envelope.is-read .envelope-seal{background:url(/assets/brand/rose-emboss.svg) center / 66% no-repeat,radial-gradient(circle at 36% 30%,#8d9cab,#5b6b79 55%,#33404b)}@media(hover:hover){.envelope:hover{--lift: -8px;--scale: 1.05;z-index:40;filter:none;box-shadow:0 26px 44px -12px #000000d9,0 0 0 1px #2f9bd699,0 0 36px -6px #2f9bd680}}.envelope:focus-visible{--lift: -8px;--scale: 1.05;z-index:40;outline-offset:4px}.envelope:active{--scale: 1.02}.table.is-leaving .envelope{animation:envelope-out .25s ease-in both;pointer-events:none}.desk-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px}.batch-label{font-size:12px;letter-spacing:.03em;color:var(--muted);white-space:nowrap}.desk-actions{display:flex;align-items:center;gap:30px}.text-action{position:relative;display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:0 2px;border:0;background:none;color:var(--muted);font:500 13.5px/1 var(--font-serif);letter-spacing:.06em;white-space:nowrap;cursor:pointer;transition:color .2s}.text-action:after{content:"";position:absolute;right:2px;bottom:9px;left:2px;height:1px;background:currentColor;opacity:.3;transition:opacity .2s}.text-action:hover:not(:disabled){color:#fff}.text-action:hover:not(:disabled):after{opacity:1}.text-action:disabled{opacity:.4;cursor:default}.text-action-primary{color:var(--ink)}.text-action-primary:after{background:var(--blue-hot);opacity:1}.text-action-arrow{color:var(--blue-hot);font-family:var(--font-display);transition:translate .25s var(--ease)}.text-action-primary:hover:not(:disabled) .text-action-arrow{translate:4px 0}.credits-bar{position:fixed;inset:auto 0 0;z-index:60;padding:10px var(--gutter) calc(10px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line);background:#03060af0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.credits-line{max-width:1440px;margin:0 auto;font-size:clamp(10px,.74vw,11.5px);line-height:1.6;text-align:center;color:var(--muted)}.credits-rights{color:#e6ddd4}.credits-sep{margin:0 .5em;opacity:.5}.credits-note-short{display:none}.credits-line a{border-bottom:1px solid var(--blue);color:var(--ink);text-decoration:none;white-space:nowrap}.credits-line a:hover{border-color:var(--blue-hot);color:#fff}.modal-open{overflow:hidden}.overlay{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:calc(28px + var(--safe-top)) 16px calc(var(--credits-h) + 24px);background:#010307c7;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);overscroll-behavior:contain;animation:fade-in .25s both}.sheet{position:relative;display:flex;flex-direction:column;width:min(680px,100%);max-height:100%;overflow:hidden;animation:unfold .4s var(--ease) both}.sheet:focus{outline:none}.modal-scroll{flex:1 1 auto;min-height:0;padding:56px clamp(24px,6vw,60px) clamp(28px,4vw,40px);overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.close-button{position:absolute;top:10px;right:10px;z-index:2;display:grid;place-items:center;width:44px;height:44px;padding:0;border:0;border-radius:50%;background:transparent;cursor:pointer;transition:background-color .2s}.close-button svg{width:22px;height:22px}.letter{min-height:min(580px,100%);color-scheme:light;color:var(--paper-ink);background:var(--grain),radial-gradient(120% 80% at 0% 0%,rgb(255 255 255 / .7),transparent 60%),var(--paper);box-shadow:0 40px 120px #000000bf,0 0 0 1px #ffffff0f}.letter .close-button:hover{background:#5a46371a}.letter :focus-visible{outline-color:var(--blue)}.letter.turn-next .modal-scroll{animation:turn-next .35s var(--ease)}.letter.turn-prev .modal-scroll{animation:turn-prev .35s var(--ease)}.letter-head{position:relative;margin-bottom:28px;padding-right:150px}.letter-sender{min-width:0}.letter-from{margin-bottom:4px;font:500 12px/1.4 var(--font-serif);letter-spacing:.04em;color:var(--blue)}.letter-title{font:500 clamp(24px,4vw,32px)/1.35 var(--font-display);overflow-wrap:anywhere}.letter-country{display:flex;align-items:center;gap:8px;margin-top:6px;font-size:14px;color:var(--paper-muted)}.letter-flag{width:22px;height:auto;aspect-ratio:4 / 3;border-radius:2px;box-shadow:0 0 0 1px #0000001f}.letter-stamp{position:absolute;top:-84px;right:18px;width:116px;aspect-ratio:.84;background:radial-gradient(circle,var(--paper) 2px,transparent 2.4px) 0 0 / 8px 8px,#fbf8f1;box-shadow:0 2px 8px #281e1438;rotate:6deg}.letter-stamp:before{content:"";position:absolute;inset:7px;border:1px solid rgb(60 40 30 / .28);background:url(/assets/brand/rose-line.svg) center 58% / 78% no-repeat,#fbf8f1}.letter-stamp:after{content:"";position:absolute;top:62px;left:-46px;width:82px;aspect-ratio:1;border:2px solid rgb(30 40 60 / .3);border-radius:50%;box-shadow:inset 0 0 0 6px transparent,inset 0 0 0 7px #1e283c29}.letter-body{display:flow-root;margin-bottom:32px}.song-photo{position:relative;float:right;width:clamp(150px,34%,210px);margin:6px 6px 20px 30px;padding:10px 10px 12px;background:#fffdf8;box-shadow:0 16px 30px -14px #28140a99,0 0 0 1px #0000000d;rotate:2.5deg}.song-photo:before{content:"";position:absolute;top:-11px;left:50%;width:70px;height:22px;background:#faf2debf;box-shadow:0 1px 2px #00000014;translate:-50% 0;rotate:-5deg}.song-art{position:relative;display:block;aspect-ratio:1;overflow:hidden;background:#efe9df}.song-photo.is-loading .song-art:after{content:"";position:absolute;top:50%;left:50%;width:28px;height:28px;margin:-14px 0 0 -14px;border:3px solid rgb(12 100 143 / .18);border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite}.song-photo.no-cover .song-art{display:none}.song-photo.no-cover .song-caption{margin-top:0}.song-cover{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .4s}.song-art[data-count="2"],.song-art[data-count="3"],.song-art[data-count="4"]{display:grid;grid-template-columns:1fr 1fr;align-content:center;gap:2px}.song-art[data-count="2"]{aspect-ratio:2 / 1}.song-art[data-count="3"],.song-art[data-count="4"]{grid-template-rows:1fr 1fr}.song-art[data-count="2"] .song-cover,.song-art[data-count="3"] .song-cover,.song-art[data-count="4"] .song-cover{position:static;aspect-ratio:1;height:auto}.song-art[data-count="3"] .song-cover:last-child{grid-column:1 / -1;justify-self:center;width:50%}.song-photo.has-cover .song-cover{opacity:1}.song-caption{display:grid;gap:2px;margin-top:10px;text-align:center}.song-label{font-size:11px;color:var(--paper-muted)}.song-title{font:500 15px/1.35 var(--font-serif);overflow-wrap:anywhere}.song-title.is-list{font-size:13px;line-height:1.5}.song-sub{font-size:11px;line-height:1.4;color:var(--paper-muted)}.letter-message{font:400 20px/1.95 var(--font-serif);white-space:pre-wrap;overflow-wrap:anywhere;transition:opacity .16s,transform .16s}.letter-message.is-short{font-size:24px;line-height:1.8}.letter-message.is-changing{opacity:0;transform:translateY(5px)}.letter-foot{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px;padding:14px clamp(20px,5vw,48px) 16px;border-top:1px solid var(--paper-line)}.segmented{display:inline-flex;border:1px solid rgb(90 70 55 / .4)}.segmented button{min-height:38px;padding:6px 16px;border:0;background:transparent;color:var(--paper-muted);font:500 13px/1 var(--font-serif);letter-spacing:.03em;cursor:pointer;transition:background-color .2s,color .2s}.segmented button+button{border-left:1px solid rgb(90 70 55 / .4)}.segmented button:hover{color:var(--paper-ink)}.segmented button[aria-pressed=true]{background:var(--paper-ink);color:var(--paper)}.letter-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.nav-button{display:inline-flex;align-items:center;gap:6px;min-height:38px;padding:6px 10px;border:0;background:none;color:var(--paper-ink);font:500 13px/1 var(--font-serif);letter-spacing:.03em;cursor:pointer;transition:color .2s}.nav-button>[aria-hidden]{margin-top:-3px;font:400 22px/1 var(--font-display)}.nav-button:hover:not(:disabled){color:var(--blue)}.nav-button:disabled{opacity:.3;cursor:default}.letter-position{min-width:52px;font:500 13px/1 var(--font-display);font-variant-numeric:lining-nums tabular-nums;text-align:center;color:var(--paper-muted)}.terms{width:min(720px,100%);border:1px solid var(--line);background:linear-gradient(180deg,#0a1622,#060b12 40%);box-shadow:0 30px 100px #000c}.terms:before{content:"";position:absolute;inset:0 0 auto;z-index:1;height:3px;background:linear-gradient(90deg,var(--blue),var(--blue-hot) 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strong{font-size:20px}.progress-track{flex:1;width:auto;margin:0}.table{--cols: 2;--rows: 3;--gap: 12px}.envelope-from{font-size:12px}.envelope-flag{width:16px}.envelope-read{font-size:10px}.desk-foot{min-height:52px}.desk-actions{gap:16px}.batch-label{font-size:11px}.text-action{font-size:13px;letter-spacing:.04em}.sound-toggle{height:34px;padding:0 6px}.sound-label{display:none}.credits-bar{padding-top:8px;padding-bottom:calc(8px + env(safe-area-inset-bottom,0px))}.credits-line{font-size:10px;line-height:1.55}.credits-note-full{display:none}.credits-note-short{display:inline}.overlay{padding-right:10px;padding-left:10px}.modal-scroll{padding:52px 22px 26px}.letter-head{padding-right:104px}.letter-stamp{top:-72px;right:40px;width:84px}.letter-stamp:before{inset:5px}.letter-stamp:after{top:44px;left:-34px;width:60px}.letter-message{font-size:18px;line-height:1.9}.letter-message.is-short{font-size:20px}.song-photo{width:124px;margin:4px 2px 14px 16px;padding:7px 7px 9px}.song-title{font-size:13px}.song-title.is-list{font-size:11px}.song-sub{font-size:10px}.letter-foot{padding:10px 14px 12px}.segmented button{padding:6px 12px}.nav-button{padding:6px 8px}.nav-button [data-i18n]{display:none}.letter-position{min-width:44px}.end-banner{padding:18px 14px}.end-message{font-size:15px}}@media(max-width:420px){.brand-text{display:none}}@media(max-height:760px){.intro-content{gap:16px}.lockup-logo{width:104px}.lockup-name{font-size:clamp(26px,3vw,40px)}}@media(max-width:359px){.batch-label{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-delay:0ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}