@charset "UTF-8";
:root{color-scheme:dark;--ink:#102237;--paper:#f4f5f1;--muted:#b3c1ce;--accent:#ead1a4;--line:#355069;--soft:#1b334c;--serif:"Songti SC","STSong","Noto Serif CJK SC",serif;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{font-size:16px;background:var(--ink)}
body{margin:0;color:var(--paper);font-family:var(--sans);line-height:1.7;background:linear-gradient(115deg,#102237 0%,#102237 62%,#162e46 100%);min-height:100svh}
button,input{font:inherit}
a{color:inherit}
button,summary,a,input{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
button:focus-visible,summary:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.skip-link{position:absolute;top:8px;left:16px;z-index:5;background:var(--accent);color:var(--ink);padding:8px 16px;transform:translateY(-170%)}
.skip-link:focus{transform:none}
.site-shell{width:min(1120px,calc(100% - 104px));margin:0 auto}
.masthead{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:37px 0 26px;border-bottom:1px solid var(--line)}
.wordmark{font-family:var(--sans);font-size:.875rem;letter-spacing:.05em;text-decoration:none;white-space:nowrap;color:var(--muted)}
.wordmark-dot{color:var(--accent)}
.masthead-note{font-size:.875rem;color:var(--muted);letter-spacing:.05em}
.main-grid{display:grid;grid-template-columns:minmax(0,1fr) 236px;gap:84px;padding:48px 0 64px;min-height:640px}
.chapter-track{display:flex;gap:24px;flex-wrap:wrap;padding-bottom:37px;color:var(--muted);font-size:.875rem}
.chapter{display:flex;gap:9px;align-items:baseline;position:relative;opacity:.7}
.chapter b{font-family:Georgia,serif;font-weight:400;font-size:1rem}
.chapter.is-current{color:var(--accent);opacity:1}
.chapter.is-current::after{content:"";position:absolute;left:0;right:0;bottom:-9px;height:1px;background:var(--accent)}
.chapter.is-past{color:var(--paper);opacity:1}
.eyebrow{color:var(--accent);font-size:.875rem;letter-spacing:.12em}
h1{font-family:var(--serif);font-size:clamp(2.125rem,4.4vw,3.375rem);font-weight:400;letter-spacing:.025em;line-height:1.42;margin:17px 0 22px;overflow-wrap:anywhere;white-space:pre-line}
.intro{font-size:1rem;color:var(--muted);margin:0 0 28px;line-height:1.9}
.field-label{display:block;font-size:.875rem;color:var(--muted);margin-bottom:9px}
.entry-row{display:flex;gap:12px;align-items:stretch}
input{min-width:0;width:100%;border:1px solid #58728b;background:#102237;color:var(--paper);border-radius:3px;padding:12px 15px;letter-spacing:.12em;font-size:1.0625rem;min-height:54px}
input::placeholder{color:#97adbf;letter-spacing:.04em;font-size:1rem}
input[aria-invalid="true"]{border-color:#eeb29e}
.primary-button{background:var(--accent);color:#142537;border:1px solid var(--accent);border-radius:3px;font-size:1rem;min-height:54px;padding:12px 22px;white-space:nowrap;transition:background .15s,transform .15s}
.primary-button:hover{background:#f5dfbd}
.primary-button:active{transform:translateY(1px)}
.form-message{font-size:.875rem;min-height:1.8em;line-height:1.8;margin:8px 0 16px;color:#f0beab}
.hint{max-width:560px;color:var(--muted);font-size:.875rem}
.hint summary{display:inline-block;list-style:none;text-decoration:underline;text-decoration-color:#58728b;text-underline-offset:5px;cursor:pointer;padding:4px 0}
.hint summary::-webkit-details-marker{display:none}
.hint p{line-height:1.9;margin:13px 0 0;border-left:1px solid var(--line);padding-left:16px}
.margin-note{border-left:1px solid var(--line);padding-left:31px;margin-top:73px}
.margin-rule{width:25px;height:3px;background:var(--accent);margin:0 0 22px}
.margin-label{color:var(--muted);font-size:.875rem;letter-spacing:.08em;margin:0 0 27px}
.margin-poem{font-family:var(--serif);font-size:1.25rem;line-height:2;letter-spacing:.035em;margin:20px 0 25px}
.margin-small{color:var(--muted);font-size:.875rem;margin:10px 0 0}
.appointment-date{font-family:Georgia,serif;font-size:3rem;line-height:1.25;letter-spacing:.01em;color:var(--accent);margin:0}
.appointment-date span{font-size:2.25rem;margin:0 7px}
.appointment-time{color:var(--paper);font-size:1rem;font-variant-numeric:tabular-nums;margin:13px 0 0}
.page-footer{border-top:1px solid var(--line);color:var(--muted);font-size:.875rem;padding:21px 0 28px;display:flex;justify-content:space-between;gap:20px}
.dialogue{margin:31px 0 26px;max-width:600px}
.voice{font-family:var(--serif);font-size:clamp(1.125rem,1.8vw,1.375rem);line-height:2;letter-spacing:.02em;margin:0}
.question{color:var(--muted);margin-bottom:15px}
.reply{color:var(--paper)}
.quiet-note{color:var(--muted);font-size:1rem;margin:0 0 28px}
.countdown{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;max-width:490px;margin:34px 0 23px}
.countdown>div{border-top:1px solid #58728b;padding-top:13px;display:flex;flex-direction:column;gap:3px}
.countdown strong{font-family:Georgia,serif;font-weight:400;font-size:clamp(2rem,3.7vw,3rem);line-height:1.25;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.025em}
.countdown span{color:var(--muted);font-size:.875rem}
.waiting-footnote{font-size:.875rem;color:var(--muted);margin:0 0 28px}
.text-button{background:none;color:var(--muted);border:0;border-bottom:1px solid #58728b;padding:3px 0;font-size:.875rem;min-height:36px;margin:7px 0 0}
.text-button:hover{color:var(--paper)}
.birthday-dialogue{margin-top:25px}
.birthday-music{max-width:540px;border-top:1px solid var(--line);padding-top:20px;margin:0 0 24px}
.music-title{font-family:var(--serif);font-size:1.25rem;line-height:1.5;margin:0 0 16px;color:var(--accent)}
.music-title span{display:inline-block;font-family:var(--sans);font-size:.875rem;color:var(--muted);margin-left:14px}
.music-actions{display:flex;align-items:center;flex-wrap:wrap;gap:20px;margin-bottom:12px}
.music-actions .primary-button{width:auto;min-width:116px}
.music-actions .text-button{margin:0}
.birthday-music audio{display:block;width:100%;margin:16px 0 0;height:54px}
.music-message{color:#f0beab;font-size:.875rem;line-height:1.8;margin:10px 0 0}
.music-actions button:disabled{cursor:wait;opacity:.65}
.noscript{border-left:1px solid var(--accent);padding-left:12px;font-size:1rem}
@media(max-width:900px){.site-shell{width:calc(100% - 64px)}.main-grid{grid-template-columns:minmax(0,1fr) 185px;gap:35px}.margin-note{padding-left:24px}.chapter-track{gap:16px}.chapter{gap:6px}.primary-button{padding:12px 17px}}
@media(max-width:680px){.site-shell{width:calc(100% - 40px)}.masthead{padding:25px 0 20px;gap:16px}.wordmark{font-size:1.4375rem}.masthead-note{font-size:.875rem;letter-spacing:0;text-align:right;max-width:126px}.main-grid{display:block;padding:31px 0 40px;min-height:0}.chapter-track{padding-bottom:36px;gap:20px 12px;justify-content:space-between}.chapter{gap:5px;font-size:.875rem}.chapter b{font-size:.9375rem}h1{font-size:2.25rem;margin-top:15px;line-height:1.45}.intro{margin-bottom:25px}.entry-row{flex-direction:column;gap:11px}.primary-button{width:100%;min-height:52px}.margin-note{display:flex;flex-wrap:wrap;align-items:baseline;gap:13px 24px;border-left:0;border-top:1px solid var(--line);padding:20px 0 0;margin-top:42px}.margin-rule{display:none}.margin-label{font-size:.875rem;margin:0}.margin-poem{font-size:1rem;line-height:1.8;margin:0}.margin-poem br{display:none}.margin-small{margin-top:5px}.margin-note #sealed-note{flex:1;min-width:180px}.margin-note #appointment-note{flex:1;min-width:210px}.appointment-date{font-size:1.75rem;display:inline-block}.appointment-date span{font-size:1.25rem;margin:0 5px}.appointment-time{display:inline-block;font-size:.9375rem;margin:0 0 0 14px}.margin-note #appointment-poem{font-size:1rem;margin:12px 0 0}.margin-note #appointment-note .margin-small{display:inline-block;margin-left:10px}.page-footer{font-size:.875rem;padding:18px 0 23px}.voice{font-size:1.25rem;line-height:2}.countdown{gap:13px;margin-top:29px}.countdown strong{font-size:2.25rem}.quiet-note{margin-bottom:26px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.is-playing .main-grid{grid-template-columns:minmax(0,1fr);gap:0}
.is-playing .margin-note{display:none}
.is-playing h1{font-size:clamp(2rem,3.6vw,2.75rem);margin:14px 0 15px}
.is-playing .chapter-track{padding-bottom:28px}
.puzzle-intro{margin-bottom:8px}
.interaction-note{color:var(--muted);font-size:.875rem;margin:0 0 24px}
.cake-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.cake-card{border:1px solid var(--line);background:#132940;border-radius:8px;padding:15px 10px 9px;min-width:0;overflow:hidden;display:flex;flex-direction:column}
.cake-card h2{font-family:var(--serif);font-size:1rem;font-weight:400;color:var(--accent);margin:0 0 8px;text-align:center}
.cake-stage{position:relative;isolation:isolate;min-height:350px;display:flex;align-items:flex-end;justify-content:center;padding:20px 0 70px;flex:1}
.cake-image{position:absolute;z-index:-1;left:0;bottom:0;width:100%;height:auto;display:block;pointer-events:none}
.candle-grid{display:grid;grid-template-columns:repeat(3,48px);gap:2px 4px;justify-content:center;position:relative}
.candle{--wax-color:#f2e5cd;--pattern-color:#183149;position:relative;width:48px;height:calc(72px + .875rem);padding:0;background:none;border:0;border-radius:5px;display:flex;flex-direction:column;align-items:center;color:var(--wax-color)}
.candle:hover{background:#ead1a414}
.candle:focus-visible{outline-offset:1px}
.color-red{--wax-color:#e75757}.color-blue{--wax-color:#4b9fef}.color-gold{--wax-color:#efbf49}
.pattern-red{--pattern-color:#a32734}.pattern-blue{--pattern-color:#2460a2}.pattern-gold{--pattern-color:#ffdc68}
.flame{width:20px;height:20px;color:#ffc46a;fill:#ffd178;filter:drop-shadow(0 0 5px #ffc46a66);flex:none;transition:opacity .15s}
.candle-body{position:relative;display:block;width:38px;height:56px;flex:none;overflow:hidden}
.wax-image,.wax-tint{position:absolute;inset:0;display:block;background:url('./assets/candle-base.webp') center center/230px 75px no-repeat}
.wax-tint{background:var(--wax-color);mask:url('./assets/candle-base.webp') center center/230px 75px no-repeat;-webkit-mask:url('./assets/candle-base.webp') center center/230px 75px no-repeat;mix-blend-mode:multiply}
.candle-mark{position:absolute;left:50%;top:15px;transform:translateX(-50%);width:22px;height:30px;display:flex;align-items:center;justify-content:center;color:var(--pattern-color)}
.candle-mark svg{width:22px;height:24px;stroke-width:2}
.lit-state{font-size:.75rem;line-height:1.1;color:#fff1d2;margin-top:1px;background:#142a40e6;padding:1px 4px;border-radius:2px}
.candle[aria-pressed="false"] .flame{opacity:0;filter:none}
.candle[aria-pressed="false"] .lit-state{color:var(--muted)}
.puzzle-actions{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin-top:25px}
.puzzle-actions .primary-button{width:auto}
.code-panel{max-width:640px;border-top:1px solid var(--line);padding-top:24px;margin-top:16px}
.code-panel h2{font-family:var(--serif);font-size:1.75rem;font-weight:400;color:var(--paper);margin:0 0 12px}
.code-panel p{color:var(--muted);margin:0 0 20px}
.code-panel .form-message{color:#f0beab;margin:8px 0 16px}
.birthday-note{max-width:640px;border-top:1px solid var(--line);padding-top:20px;margin-top:22px}
.birthday-note>p:first-child{font-family:var(--serif);font-size:1.375rem;margin:0 0 5px}
.birthday-note .text-button{margin-right:24px}
#birthday-answer{color:var(--accent);font-size:1.25rem;letter-spacing:.04em}
@media(max-width:1000px){.cake-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cake-stage{min-height:340px;padding-bottom:70px}.cake-image{width:85%;left:7.5%}.many-candles .candle-grid{grid-template-columns:repeat(3,48px);gap:1px 8px}}
@media(max-width:680px){.cake-grid{gap:12px}.cake-card{padding:13px 5px 7px}.cake-stage{min-height:287px;padding-top:12px;padding-bottom:40px}.cake-image{width:100%;left:0}.candle-grid,.many-candles .candle-grid{grid-template-columns:repeat(3,44px);gap:1px 0}.candle{width:44px;height:calc(66px + .875rem)}.candle-body{height:50px}.wax-image,.wax-tint{background-size:230px 69px;mask-size:230px 69px;-webkit-mask-size:230px 69px}.candle-mark{top:12px}.flame{width:19px;height:19px}.cake-card h2{font-size:.875rem}.puzzle-actions{gap:14px;margin-top:22px}.puzzle-actions .primary-button{width:100%}.code-panel h2{font-size:1.5rem}.masthead .wordmark{font-size:.875rem}.is-playing h1{font-size:2rem}}
@media(max-width:359px){.cake-grid{grid-template-columns:1fr}.cake-stage{min-height:250px;padding-bottom:70px}.many-candles{min-height:330px}.cake-image{width:75%;left:12.5%}.many-candles .candle-grid{grid-template-columns:repeat(3,48px)}.candle{width:48px}}