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rgba(255,255,255,.08)}.header-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:1.1rem;font-weight:700;text-decoration:none}.brand strong{color:var(--yellow)}.brand-mark{width:34px;height:34px;border:2px solid var(--yellow);border-radius:50%;position:relative;display:inline-block}.brand-mark .planet{position:absolute;width:10px;height:10px;border-radius:50%;background:var(--yellow);left:10px;top:10px}.brand-mark .orbit{position:absolute;width:38px;height:13px;border:2px solid var(--blue);border-radius:50%;left:-4px;top:8px;transform:rotate(-32deg)}.site-nav{display:flex;gap:22px}.site-nav a{color:#e8eef5;text-decoration:none;font-weight:600;font-size:.94rem}.site-nav a:hover,.site-nav a:focus{color:var(--yellow)}.nav-toggle{display:none;background:transparent;color:white;border:1px solid rgba(255,255,255,.35);padding:8px 12px;border-radius:8px}.hero{background:radial-gradient(circle at 70% 30%,#15385c 0,var(--deep) 48%);color:#fff;padding:84px 0;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:70px}.eyebrow{font-size:.78rem;letter-spacing:.11em;text-transform:uppercase;font-weight:800;color:var(--blue)}.hero .eyebrow{color:var(--yellow)}h1,h2,h3{line-height:1.14;margin:0 0 16px}h1{font-size:clamp(2.4rem,6vw,5rem);letter-spacing:-.045em}.page-hero h1{font-size:clamp(2.2rem,5vw,4rem)}h2{font-size:clamp(1.65rem,3vw,2.4rem);letter-spacing:-.025em}h3{font-size:1.2rem}.hero-copy,.lead{font-size:1.16rem;max-width:720px}.hero-copy{color:#d8e2ec}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:10px;font-weight:750;border:1px solid transparent;text-decoration:none;cursor:pointer;font:inherit}.button.primary{background:var(--yellow);color:#111827}.button.secondary{background:transparent;border-color:#8aa0b7;color:inherit}.button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.nav-toggle:focus-visible{outline:3px solid #66aef1;outline-offset:2px}.hero-orbit{min-height:370px;position:relative}.hero-orbit .sun{position:absolute;width:42px;height:42px;border-radius:50%;background:var(--yellow);left:50%;top:50%;transform:translate(-50%,-50%);box-shadow:0 0 55px rgba(255,203,31,.45)}.orbit-line{position:absolute;border:1px solid rgba(255,255,255,.25);border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%)}.o1{width:150px;height:150px}.o2{width:245px;height:245px}.o3{width:340px;height:340px}.orbit-line i{position:absolute;width:16px;height:16px;border-radius:50%;background:#3b82f6;top:50%;left:-8px}.o2 i{background:#d08a4b;top:15%;left:82%}.o3 i{background:#9ad3df;top:74%;left:91%}.section{padding:72px 0}.section.alt{background:#eef3f8}.section-heading{max-width:700px;margin-bottom:34px}.section-heading p{color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-decoration:none;color:var(--ink);box-shadow:0 4px 20px rgba(15,32,52,.03);transition:transform .18s ease,border-color .18s ease}.feature-card:hover{transform:translateY(-3px);border-color:#aac7e3}.feature-card p{color:var(--muted)}.card-link{font-weight:750;color:var(--blue)}.split{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}.fact-panel{background:var(--deep);color:white;border-radius:var(--radius);padding:28px}.fact-panel>div{padding:18px 0;border-bottom:1px solid rgba(255,255,255,.12)}.fact-panel>div:last-child{border:0}.fact-panel strong{display:block;color:var(--yellow);font-size:1.35rem}.fact-panel span{color:#c9d5e1}.page-hero{background:linear-gradient(135deg,var(--deep),#102c49);color:#fff;padding:64px 0}.page-hero .lead{color:#d8e2ec}.tool-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(280px,.65fr);gap:28px;align-items:start}.tool-card,.method-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.tool-controls{padding:26px;border-bottom:1px solid var(--line)}.tool-result{padding:30px;min-height:180px}.method-card{padding:26px}.method-card p{color:var(--muted)}label{display:block;font-size:.9rem;font-weight:750;margin-bottom:7px}input,select,textarea{width:100%;border:1px solid #bdc8d4;border-radius:9px;padding:11px 12px;background:#fff;color:var(--ink);font:inherit}.tool-controls>.button{margin-top:14px}.two-inputs,.form-grid{display:grid;grid-template-columns:1fr 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