:root{--ink: #172436;--paper: #f6efe1;--text-ink: #2a2118;--muted-ink: #70675c;--line: #d9d0c1;--shadow: rgb(42 33 24 / .14)}*{box-sizing:border-box}html{min-width:320px}body{min-width:320px;min-height:100vh;margin:0;color:var(--text-ink);background:var(--paper);font-family:Georgia,Times New Roman,serif;font-size:16px;line-height:1.6}button{font:inherit}button:focus-visible{outline:3px solid var(--ink);outline-offset:5px}.page-shell{width:min(1120px,100%);margin:0 auto;padding:clamp(48px,9vw,104px) clamp(20px,5vw,64px) 72px}.intro{max-width:510px}.eyebrow{margin:0 0 14px;color:var(--muted-ink);font-family:Courier New,monospace;font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase}h1{margin:0;color:var(--ink);font-size:clamp(2.85rem,7vw,5.8rem);font-weight:500;letter-spacing:-.06em;line-height:.9}.intro-copy{max-width:34ch;margin:25px 0 0;color:var(--muted-ink);font-size:clamp(1rem,1.8vw,1.12rem)}.letter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:clamp(30px,4vw,48px) clamp(18px,3vw,34px);align-items:start;margin:0}.letter-choice{display:block;min-width:0;padding:0;color:var(--ink);cursor:pointer;background:transparent;border:0;text-align:center}.envelope{position:relative;display:block;width:100%;aspect-ratio:1.28;overflow:hidden;border:1px solid color-mix(in srgb,var(--accent) 73%,var(--ink));border-radius:5px;background:var(--accent);box-shadow:0 12px 24px #37292329,0 2px 3px #ffffff47 inset;perspective:700px;transition:box-shadow .18s ease,transform .18s ease;transform:translateY(0)}.letter-choice:hover .envelope,.letter-choice:focus-visible .envelope{box-shadow:0 19px 31px #37292333,0 2px 3px #ffffff47 inset;transform:translateY(-5px)}.envelope-flap{position:absolute;z-index:2;top:0;left:0;width:100%;height:68%;background:color-mix(in srgb,var(--accent) 90%,var(--ink));clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:top center;transition:transform .3s ease}.envelope-letter{position:absolute;z-index:1;right:12%;bottom:10%;left:12%;height:72%;background:var(--paper);opacity:0;transform:translateY(24%);transition:opacity .16s ease,transform .3s ease}.letter-choice.is-opening .envelope-flap{transform:rotateX(180deg)}.letter-choice.is-opening .envelope-letter{opacity:1;transform:translateY(-16%)}.letter-label{display:block;max-width:16ch;margin-top:14px;margin-inline:auto;font-size:clamp(1rem,1.8vw,1.1rem);line-height:1.2}.letter-label small{display:block;margin-bottom:3px;color:var(--muted-ink);font-family:Courier New,monospace;font-size:.64em;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.dialog-layer{position:fixed;z-index:10;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:clamp(16px,4vw,48px)}.dialog-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#17243673;opacity:0;transition:opacity .22s ease}.reading-view{position:relative;z-index:1;width:min(720px,100%);max-height:min(790px,100%);overflow:auto;padding:clamp(48px,8vw,82px) clamp(28px,7vw,76px) clamp(38px,7vw,68px);color:var(--text-ink);background:#fffdf8;border-top:8px solid var(--accent, var(--ink));box-shadow:0 24px 60px #17243642;opacity:0;transform:translateY(22px);transition:opacity .24s ease,transform .32s ease}.dialog-layer.is-visible .dialog-backdrop,.dialog-layer.is-visible .reading-view{opacity:1}.dialog-layer.is-visible .reading-view{transform:translateY(0)}.close-button{position:absolute;top:15px;right:16px;display:grid;width:34px;height:34px;padding:0;color:var(--text-ink);cursor:pointer;background:transparent;border:1px solid var(--line);border-radius:50%;font-family:Arial,sans-serif;font-size:1.45rem;font-weight:300;line-height:1;place-items:center}.close-button:hover{border-color:var(--text-ink)}.reading-lead{margin:0 0 5px;color:var(--accent, var(--ink));font-family:Courier New,monospace;font-size:.7rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.reading-title{max-width:13ch;margin:0;color:var(--ink);font-size:clamp(2.35rem,7vw,4.6rem);font-weight:500;letter-spacing:-.055em;line-height:.96}.reading-to{margin:48px 0 24px;font-size:1.12rem;font-style:italic}.reading-body{max-width:58ch;font-size:clamp(1.03rem,2vw,1.16rem);line-height:1.85}.reading-body p{margin:0 0 1.35em}.reading-sign{margin:38px 0 0;color:var(--accent, var(--ink));font-size:1.12rem;font-style:italic}body.dialog-open{overflow:hidden}@media(max-width:480px){.letter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.letter-label{font-size:.94rem}.reading-view{max-height:100%}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}