:root{--petrol-900: #0f2b33;--petrol-800: #143c46;--petrol-700: #0a6f66;--petrol-500: #0d9e8f;--petrol-100: #e3f4f1;--ink: #1d2733;--ink-soft: #4a5b66;--paper: #ffffff;--sand: #f6f8fb;--line: #dde3ec;--warn-bg: #fff5e5;--warn-line: #f0c274;--radius: 12px;--shadow: 0 1px 2px rgba(16, 30, 54, .06), 0 8px 24px rgba(16, 30, 54, .06)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:1.0625rem;line-height:1.65;color:var(--ink);background:var(--sand)}a{color:var(--petrol-700);text-decoration-thickness:1px;text-underline-offset:2px}a:hover{color:var(--petrol-900)}:focus-visible{outline:3px solid var(--petrol-500);outline-offset:2px;border-radius:4px}.wrap{width:min(1120px,100% - 2.5rem);margin-inline:auto}.wrap-narrow{width:min(76ch,100% - 2.5rem);margin-inline:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;z-index:10;padding:.5rem .9rem;background:var(--paper);border-radius:8px}.site-header{background:linear-gradient(180deg,var(--petrol-900),var(--petrol-800));color:#f2f7f8}.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;padding-block:.9rem}.brand{display:inline-flex;align-items:center;gap:.55rem;color:#fff;font-weight:700;font-size:1.15rem;text-decoration:none;letter-spacing:.01em}.brand-mark{display:grid;place-items:center;width:2rem;height:2rem;border-radius:9px;background:var(--petrol-500);color:#06231f;font-weight:800;font-size:.95rem}.site-nav{display:flex;flex-wrap:wrap;gap:.25rem;margin-left:auto}.site-nav a{color:#d9e5e8;text-decoration:none;padding:.4rem .7rem;border-radius:8px;font-size:.98rem}.site-nav a:hover{background:#ffffff1f;color:#fff}.site-nav a[aria-current=page]{background:var(--petrol-500);color:#06231f;font-weight:600}main{padding-block:2.5rem 4rem}h1,h2,h3{line-height:1.25;color:var(--petrol-900);letter-spacing:-.01em}h1{font-size:clamp(1.8rem,1.2rem + 2vw,2.6rem);margin:0 0 .75rem}h2{font-size:1.45rem;margin:2.2rem 0 .6rem}h3{font-size:1.15rem;margin:1.6rem 0 .4rem}.lead{font-size:1.15rem;color:#3b4a5a;max-width:62ch}.hero{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow);margin-bottom:2rem}.card-grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));margin-block:1.5rem 2.5rem}.card{display:block;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.5rem;text-decoration:none;color:inherit;box-shadow:var(--shadow);transition:transform .15s ease,border-color .15s ease}.card:hover{transform:translateY(-2px);border-color:var(--petrol-500)}.card h2{margin:0 0 .4rem;font-size:1.2rem}.card p{margin:0;color:#46586a;font-size:.98rem}.card .more{display:inline-block;margin-top:.8rem;color:var(--petrol-700);font-weight:600;font-size:.95rem}.tour{display:grid;gap:1.5rem;margin-top:2rem}.step{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;scroll-margin-top:1.5rem}.step-head{display:flex;align-items:baseline;gap:.7rem;padding:1.1rem 1.5rem 0}.step-number{flex:none;display:grid;place-items:center;width:1.85rem;height:1.85rem;border-radius:50%;background:var(--petrol-100);color:var(--petrol-800);font-weight:700;font-size:.9rem}.step h2{margin:0;font-size:1.2rem}.step-body{padding:.6rem 1.5rem 1.4rem}.step p{margin:0 0 1rem}.step figure{margin:0}.step img{display:block;width:100%;height:auto;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#eef2f7}.step figure.portrait img{width:auto;max-width:min(100%,420px);margin:0 auto;border-radius:0}.hint{margin:1rem 1.5rem 1.4rem;padding:.7rem .9rem;border-left:3px solid var(--warn-line);background:var(--warn-bg);border-radius:0 8px 8px 0;font-size:.95rem;color:#5a4520}.prose{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}.prose h1{font-size:clamp(1.6rem,1.1rem + 1.6vw,2.2rem);margin:0 0 1rem}.prose>:first-child{margin-top:0}.prose h2{border-top:1px solid var(--line);padding-top:1.4rem}.prose ul,.prose ol{padding-left:1.3rem}.prose li{margin-block:.25rem}.prose code{background:var(--petrol-100);padding:.1rem .35rem;border-radius:5px;font-size:.92em}.prose table{width:100%;border-collapse:collapse;font-size:.97rem;margin-block:1rem}.prose th,.prose td{text-align:left;padding:.5rem .6rem;border-bottom:1px solid var(--line);vertical-align:top}.prose blockquote{margin:1rem 0;padding:.2rem 0 .2rem 1rem;border-left:3px solid var(--petrol-500);color:#43566a}.prose img{max-width:100%;height:auto}.chapter-list{list-style:none;padding:0;margin:0;display:grid;gap:.6rem}.chapter-list a{display:block;padding:.85rem 1.1rem;background:var(--paper);border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink)}.chapter-list a:hover{border-color:var(--petrol-500)}.chapter-list small{display:block;color:#5a6b7c;font-size:.9rem}.breadcrumb{font-size:.92rem;margin-bottom:1.2rem;color:#5a6b7c}.breadcrumb a{color:var(--petrol-700)}.prevnext{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem;font-size:.98rem}.site-footer{border-top:1px solid var(--line);background:var(--paper);padding-block:1.6rem;font-size:.93rem;color:#5a6b7c}.site-footer .wrap{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;align-items:center}.site-footer a{color:var(--petrol-700)}@media(max-width:600px){.hero,.prose{padding:1.3rem}.step-head{padding:1rem 1rem 0}.step-body{padding:.5rem 1rem 1.2rem}.hint{margin-inline:1rem}}@media print{.site-header,.site-footer,.prevnext{display:none}.step,.prose{box-shadow:none;break-inside:avoid}}