.sp-essay{--ink:#071828;--panel:#10283a;--paper:#f7fbfd;--mist:#b9cbd8;--copper:#e87537;--amber:#ffb35c;--blue:#67c7e8;--cyan:#c9f1ff;color:#243746;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;font-size:1.08rem;line-height:1.75;max-width:1120px;margin:0 auto;background:#fff}.sp-essay *{box-sizing:border-box}.sp-hero{background:var(--ink);color:var(--paper);padding:clamp(2rem,6vw,5.5rem);border-top:6px solid var(--copper);position:relative;overflow:hidden}.sp-hero:after{content:"";position:absolute;right:-120px;top:-160px;width:420px;height:420px;border:1px solid rgba(103,199,232,.25);border-radius:50%;box-shadow:0 0 0 60px rgba(103,199,232,.04),0 0 0 120px rgba(232,117,55,.03)}.sp-kicker{color:var(--blue);font-size:.78rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.sp-hero h1{font-size:clamp(2.6rem,7vw,5.5rem);line-height:.98;margin:.5rem 0 1.5rem;max-width:800px}.sp-deck{font-size:clamp(1.2rem,2.4vw,1.7rem);color:var(--mist);max-width:760px;line-height:1.45}.sp-question{margin-top:2.2rem;color:var(--cyan);font-style:italic;font-size:1.15rem;max-width:780px}.sp-toc{background:#eef6f9;padding:1.5rem clamp(1.25rem,4vw,3rem);border-left:5px solid var(--blue);margin:2rem 0}.sp-toc strong{color:var(--ink)}.sp-toc ol{columns:2;column-gap:2rem;margin:.8rem 0 0;padding-left:1.4rem}.sp-toc a{color:#185b75;text-decoration:none}.sp-toc a:hover{text-decoration:underline}.sp-intro,.sp-section,.sp-closing{padding:clamp(2rem,5vw,4.5rem) clamp(1.25rem,7vw,6rem)}.sp-intro{font-size:1.18rem}.sp-section{border-top:1px solid #dce9ee}.sp-section:nth-of-type(even){background:#f7fbfd}.sp-num{display:inline-block;color:var(--copper);font-size:.82rem;font-weight:800;letter-spacing:.14em;margin-bottom:.5rem}.sp-section h2{color:var(--ink);font-size:clamp(1.8rem,4vw,3rem);line-height:1.14;margin:.2rem 0 1rem}.sp-section p{max-width:780px}.sp-plate{margin:2rem 0 1.1rem}.sp-plate a{display:block}.sp-plate img{display:block;width:100%;height:auto;border:1px solid #87bfd2;border-radius:12px;box-shadow:0 18px 50px rgba(7,24,40,.16)}.sp-plate figcaption{color:#5c7180;font-size:.88rem;line-height:1.5;margin-top:.7rem}.sp-callout{background:var(--ink);color:var(--paper);padding:1.4rem 1.6rem;border-left:6px solid var(--copper);margin:2rem 0;font-size:1.25rem;line-height:1.5}.sp-callout em{color:var(--cyan)}.sp-bridge{color:#4f6674;border-left:3px solid var(--blue);padding-left:1.2rem;margin:1.7rem 0}.sp-status{font-size:.9rem;color:#586d7a;background:#edf4f6;padding:.9rem 1rem;border-radius:8px}.sp-closing{background:var(--ink);color:var(--mist)}.sp-closing h2{color:var(--paper);font-size:clamp(2rem,4vw,3.4rem);line-height:1.15}.sp-closing strong{color:var(--amber)}.sp-related{padding:2rem clamp(1.25rem,7vw,6rem);background:#edf5f8}.sp-related h2{color:var(--ink)}.sp-related ul{padding-left:1.2rem}.sp-related a{color:#155d79}.sp-note{font-size:.92rem;color:#607582}.sp-downloads{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.4rem}.sp-downloads a{background:var(--copper);color:#fff;padding:.72rem 1rem;border-radius:6px;text-decoration:none;font-weight:700}@media(max-width:700px){.sp-toc ol{columns:1}.sp-hero{padding:2rem 1.25rem}.sp-section p{max-width:none}.sp-callout{font-size:1.08rem}}