:root{--ink:#13252d;--muted:#52646c;--paper:#f7f5ef;--card:#fff;--line:#d7ddd8;--ocean:#075d69;--sky:#dff2f0;--sun:#f2b94b;--shadow:0 18px 60px rgba(22,51,58,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--ocean)}.skip{position:absolute;left:-999px;top:1rem}.skip:focus{left:1rem;background:#fff;padding:.7rem 1rem;z-index:10}.site-header{display:flex;align-items:center;justify-content:space-between;gap:2rem;padding:1rem clamp(1rem,4vw,4rem);background:#fff;border-bottom:1px solid var(--line)}.brand{font-weight:900;text-decoration:none;color:var(--ink);letter-spacing:-.03em}.brand span{color:var(--ocean)}nav{display:flex;gap:1.2rem;flex-wrap:wrap}nav a{font-weight:700;text-decoration:none;font-size:.9rem}.hero,.planner-shell,.decision-path,.sources,.limits{max-width:1160px;margin:auto;padding:clamp(3rem,7vw,6rem) clamp(1rem,4vw,3rem)}.hero{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.6fr);gap:clamp(2rem,6vw,5rem);align-items:center}.eyebrow{margin:0 0 .6rem;text-transform:uppercase;letter-spacing:.13em;font-size:.75rem;font-weight:900;color:var(--ocean)}h1,h2,h3{line-height:1.12;letter-spacing:-.035em}h1{font-size:clamp(2.6rem,7vw,5.8rem);margin:.2rem 0 1.3rem;max-width:900px}.lede{font-size:clamp(1.1rem,2vw,1.35rem);max-width:760px;color:var(--muted)}.notice{border-left:5px solid var(--sun);background:#fff;padding:1rem 1.2rem;margin-top:2rem;max-width:760px}.start-card{background:var(--ink);color:#fff;border-radius:22px;padding:2rem;box-shadow:var(--shadow)}.start-card .eyebrow{color:#8bd6d0}.start-card h2{font-size:1.8rem;margin:.2rem 0}.start-card ol{padding-left:1.3rem;margin-bottom:0}.start-card li{padding:.35rem 0}.planner-shell{background:var(--card);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow)}.section-heading{max-width:760px;margin-bottom:2rem}.section-heading h2{font-size:clamp(2rem,4vw,3.3rem);margin:.2rem 0 .8rem}.section-heading p:last-child{color:var(--muted)}form{display:grid;grid-template-columns:minmax(260px,.6fr) minmax(0,1.4fr);gap:2rem}.field,fieldset,.result{border:1px solid var(--line);border-radius:18px;padding:1.5rem}label,legend{font-weight:800}legend{padding:0 .5rem}.duration{display:flex;align-items:center;gap:.8rem;margin:.8rem 0}.duration input,.buffer-grid input{font:inherit;border:1px solid #9aacb1;border-radius:8px;padding:.55rem;background:#fff;color:var(--ink)}.duration input{width:130px;font-size:1.4rem;font-weight:800}.field small{color:var(--muted)}fieldset{grid-column:2;grid-row:1 / span 2}.buffer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.buffer-grid label{display:flex;flex-direction:column;gap:.5rem;font-size:.92rem}.buffer-grid span{display:flex;align-items:center;gap:.45rem;color:var(--muted)}.buffer-grid input{width:100px}.result{background:var(--sky);display:grid;grid-template-columns:1fr auto;gap:.2rem 1rem;align-content:start}.result p{margin:0;color:var(--muted)}.result strong{font-size:1.15rem}.result #result-note{grid-column:1/-1;border-top:1px solid #aed1ce;margin-top:.8rem;padding-top:.8rem;color:var(--ink)}.steps,.source-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.steps article,.source-grid a{background:#fff;border:1px solid var(--line);border-radius:16px;padding:1.35rem}.steps span{display:inline-grid;place-items:center;width:2.4rem;height:2.4rem;border-radius:50%;background:var(--sky);font-weight:900;color:var(--ocean)}.steps h3{margin:.8rem 0 .4rem}.steps p{color:var(--muted);font-size:.94rem}.sources{border-top:1px solid var(--line)}.source-grid a{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);transition:.15s ease}.source-grid a:hover,.source-grid a:focus-visible{border-color:var(--ocean);transform:translateY(-2px)}.source-grid span{color:var(--muted);font-size:.9rem;margin:.5rem 0 auto}.source-grid em{color:var(--ocean);font-style:normal;font-size:.82rem;font-weight:800;padding-top:1rem}.limits{display:grid;grid-template-columns:.7fr 1.3fr;gap:2rem;background:var(--ink);color:#fff;border-radius:26px;margin-bottom:5rem}.limits .eyebrow{color:#8bd6d0}.limits h2{font-size:clamp(2rem,4vw,3.2rem);margin:.2rem 0}.limits li{margin:.6rem 0}footer{background:#fff;border-top:1px solid var(--line);padding:2rem clamp(1rem,4vw,4rem);color:var(--muted);font-size:.9rem}footer p{max-width:900px}
@media(max-width:850px){.hero,.limits{grid-template-columns:1fr}.steps,.source-grid{grid-template-columns:repeat(2,1fr)}form{grid-template-columns:1fr}fieldset{grid-column:auto;grid-row:auto}.site-header{align-items:flex-start;flex-direction:column;gap:.6rem}}
@media(max-width:560px){.steps,.source-grid,.buffer-grid{grid-template-columns:1fr}.site-header nav{gap:.8rem}.planner-shell{border-left:0;border-right:0;border-radius:0}.hero,.planner-shell,.decision-path,.sources,.limits{padding-left:1rem;padding-right:1rem}.limits{border-radius:0;margin-bottom:2rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.source-grid a{transition:none}}

.guide-hero{grid-template-columns:1fr;max-width:1160px}.guide-hero h1{font-size:clamp(2.5rem,6vw,5rem)}.official-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;padding:0;list-style:none}.official-list a{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem;font-weight:800;text-decoration:none}.official-list a:hover,.official-list a:focus-visible{border-color:var(--ocean)}