.gc-page{--blue:#0052cc;--blue-d:#003a8c;--navy:#0f2747;--ink:#1f2d3d;--muted:#5b6b7f;--line:#e2e8f0;--bg:#f5f8fc;--card:#fff;--accent:#00a3c4;--accent-d:#00819c;--good:#0a7d4d;--goodbg:#f2fbf7;--warn:#b54708;--warnbg:#fff8ed;--bad:#b42318;--badbg:#fef3f2;--radius:12px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-family:var(--font);color:var(--ink);line-height:1.68;font-size:16.5px;background:#fff;-webkit-font-smoothing:antialiased}
.gc-page *{box-sizing:border-box}
.gc-page img,.gc-page svg{max-width:100%}
.gc-page a{color:var(--blue);text-decoration:none}
.gc-page a:hover{text-decoration:underline}
.gc-page button,.gc-page input,.gc-page select{font-family:var(--font)}
.gc-page :focus-visible{outline:3px solid rgba(0,163,196,.55);outline-offset:2px;border-radius:6px}
.gc-wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.gc-page section{scroll-margin-top:96px;padding:38px 0 4px}
.gc-page p{margin:0 0 16px}

/* ---------- HERO ---------- */
.gc-hero{position:relative;background:linear-gradient(150deg,#f8fbff 0%,#eef4fc 52%,#e4edfa 100%);border-bottom:1px solid #dbe6f5;padding:46px 0 40px;overflow:hidden}
.gc-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(15,39,71,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(15,39,71,.055) 1px,transparent 1px);background-size:40px 40px;-webkit-mask-image:radial-gradient(ellipse 85% 90% at 78% 30%,#000 10%,transparent 85%);mask-image:radial-gradient(ellipse 85% 90% at 78% 30%,#000 10%,transparent 85%);pointer-events:none}
.gc-hero .gc-wrap{position:relative;z-index:1}
.gc-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.15em;text-transform:uppercase;color:var(--blue-d);font-weight:800;margin-bottom:14px}
.gc-eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--accent))}
.gc-hero h1{font-size:clamp(29px,4vw,42px);line-height:1.13;margin:0 0 16px;font-weight:800;letter-spacing:-.015em;color:var(--navy)}
.gc-hero .gc-sub{font-size:17.5px;color:#41536a;max-width:760px;margin:0 0 20px}
.gc-hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:34px;align-items:start}
.gc-tags{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}
.gc-tag{background:#fff;border:1px solid #cfdcee;color:#25476f;padding:6px 13px;border-radius:999px;font-size:13px;font-weight:600}
.gc-hero-cta{display:flex;flex-wrap:wrap;gap:11px}
.gc-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 24px;border-radius:9px;font-weight:700;font-size:15px;cursor:pointer;border:1.5px solid transparent;transition:transform .15s,box-shadow .15s,background .15s;text-align:center}
.gc-btn--blue{background:var(--blue);color:#fff;box-shadow:0 6px 16px rgba(0,82,204,.22)}
.gc-btn--blue:hover{background:var(--blue-d);transform:translateY(-1px);color:#fff;text-decoration:none}
.gc-btn--ghost{background:#fff;color:var(--blue-d);border-color:#b9cde8}
.gc-btn--ghost:hover{border-color:var(--blue);background:#f4f8ff;text-decoration:none}
.gc-btn--teal{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(0,163,196,.22)}
.gc-btn--teal:hover{background:var(--accent-d);color:#fff;text-decoration:none;transform:translateY(-1px)}
.gc-btn--sm{padding:9px 16px;font-size:14px}
.gc-page .gc-btn:hover{text-decoration:none}

/* quick answer card */
.gc-quick{background:#fff;border:1px solid #d7e3f2;border-top:4px solid var(--blue);border-radius:var(--radius);padding:22px 24px;box-shadow:0 10px 30px rgba(15,39,71,.07)}
.gc-quick h2{font-size:14px;text-transform:uppercase;letter-spacing:.1em;color:var(--blue-d);margin:0 0 10px;font-weight:800}
.gc-quick p{font-size:15.5px;color:#33445c;margin:0 0 12px}
.gc-quick p:last-child{margin-bottom:0}
.gc-byline{font-size:13px;color:var(--muted);margin-top:14px;padding-top:12px;border-top:1px dashed #dde6f2}
.gc-byline strong{color:#33455e}

/* ---------- STICKY SUBNAV (full-bleed) ---------- */
.gc-subnav{position:sticky;top:0;z-index:60;width:100vw;max-width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);background:rgba(255,255,255,.96);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(15,39,71,.05)}
.gc-subnav-inner{max-width:1320px;margin:0 auto;padding:6px 16px;display:flex;flex-wrap:wrap;justify-content:center;gap:2px;align-items:center}
.gc-subnav a{white-space:nowrap;padding:6px 8px;font-size:13px;font-weight:600;color:#4a5c74;border-bottom:2px solid transparent;border-radius:5px;line-height:1.5}
.gc-subnav a:hover{color:var(--blue);background:#f2f7fd;text-decoration:none}
.gc-subnav a.is-active{color:var(--blue);border-bottom-color:var(--blue)}
.gc-subnav-cta{margin-left:10px;white-space:nowrap;background:var(--blue);color:#fff;border:none;border-radius:7px;padding:6px 14px;font-size:13px;font-weight:700;cursor:pointer;line-height:1.5}
.gc-subnav-cta:hover{background:var(--blue-d)}

/* ---------- TYPOGRAPHY ---------- */
.gc-crumb{font-size:13px;color:var(--muted);padding:16px 0 0}
.gc-crumb a{color:#5a7ba6}
.gc-h2{font-size:clamp(23px,2.7vw,30px);line-height:1.22;color:var(--navy);font-weight:800;margin:8px 0 14px;letter-spacing:-.01em}
.gc-h2 .n{color:var(--accent);font-weight:800;margin-right:8px;font-size:.72em;vertical-align:2px}
.gc-h3{font-size:19.5px;color:var(--navy);font-weight:750;margin:26px 0 10px}
.gc-h4{font-size:16.5px;color:#26405f;font-weight:700;margin:18px 0 8px}
.gc-lead{font-size:17px;color:#41536a}
.gc-page ul,.gc-page ol{margin:0 0 16px;padding-left:22px}
.gc-page li{margin-bottom:7px}
.gc-page hr{border:none;border-top:1px solid var(--line);margin:30px 0}

/* extractable definition */
.gc-def{background:#f4f8ff;border-left:4px solid var(--blue);border-radius:0 10px 10px 0;padding:14px 18px;margin:0 0 20px;font-size:16.5px;color:#25405f}
.gc-def strong{color:var(--navy)}

/* callouts */
.gc-note,.gc-warn,.gc-tip{border-radius:10px;padding:15px 18px;margin:18px 0;font-size:15.5px;border:1px solid}
.gc-note{background:#f6f9fd;border-color:#dbe6f4;color:#33455e}
.gc-warn{background:var(--warnbg);border-color:#f2d5aa;color:#7a4a10}
.gc-tip{background:var(--goodbg);border-color:#c3e8d7;color:#0d5a3c}
.gc-note strong,.gc-warn strong,.gc-tip strong{display:inline}
.gc-warn::before{content:"⚠ ";font-weight:800}

/* tables */
.gc-tablewrap{overflow-x:auto;margin:0 0 22px;border:1px solid var(--line);border-radius:10px;background:#fff}
.gc-page table{border-collapse:collapse;width:100%;font-size:15px;min-width:540px}
.gc-page thead th{background:#eef4fc;color:var(--navy);text-align:left;font-weight:700;padding:12px 14px;border-bottom:2px solid #d5e2f3;font-size:14px;letter-spacing:.01em}
.gc-page tbody td{padding:11px 14px;border-bottom:1px solid #edf1f7;vertical-align:top;color:#3a4b62}
.gc-page tbody tr:nth-child(even){background:#fafbfd}
.gc-page tbody tr:last-child td{border-bottom:none}
.gc-page tbody th{padding:11px 14px;border-bottom:1px solid #edf1f7;vertical-align:top;text-align:left;color:var(--navy);font-weight:700;background:#f7fafd}
.gc-page td code,.gc-page p code,.gc-page li code,.gc-page th code{font-family:var(--mono);font-size:13.5px;background:#eef2f8;border:1px solid #dde5ef;border-radius:4px;padding:1px 6px;color:#0d3f8f}
.gc-page tbody tr.good-row td{background:#f4fbf7}
.gc-page tbody tr.warn-row td{background:#fffaf2}
.gc-page tbody tr.bad-row td{background:#fef5f4}
.gc-cap{font-size:13.5px;color:var(--muted);margin:-12px 0 24px;padding-left:2px}

/* ---------- FIGURES (inline SVG) ---------- */
.gc-fig{margin:24px 0 26px;border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden;box-shadow:0 4px 14px rgba(15,39,71,.045)}
.gc-fig svg{display:block;width:100%;height:auto}
.gc-fig figcaption{font-size:13.5px;color:#4d5f78;padding:12px 18px;background:#f8fafd;border-top:1px solid var(--line)}
.gc-fig figcaption b{color:var(--navy)}

/* ---------- FORMULA CARDS ---------- */
.gc-fmlgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin:0 0 24px}
.gc-fml{background:#fbfdff;border:1px solid #d7e3f2;border-left:4px solid var(--accent);border-radius:10px;padding:16px 18px}
.gc-fml h4{margin:0 0 10px;font-size:15px;color:var(--navy);font-weight:750}
.gc-fml .eq{font-family:var(--mono);font-size:15.5px;color:#0d3f8f;background:#fff;border:1px solid #dde5ef;border-radius:7px;padding:11px 13px;margin:0 0 11px;overflow-x:auto;white-space:nowrap;font-weight:600}
.gc-fml dl{margin:0;font-size:14px;color:#47596f}
.gc-fml dt{font-family:var(--mono);font-weight:700;color:#25405f;float:left;clear:left;margin-right:8px}
.gc-fml dt::after{content:" ="}
.gc-fml dd{margin:0 0 4px 0;padding-left:0}
.gc-fml .ex{margin:11px 0 0;padding-top:10px;border-top:1px dashed #dde6f2;font-size:14px;color:#41536a}
.gc-fml .ex b{color:var(--navy)}

/* ---------- CODE BLOCKS ---------- */
.gc-code{position:relative;background:#0f2036;border:1px solid #1d3350;border-radius:10px;margin:0 0 22px;overflow:hidden}
.gc-code-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 14px;background:#152a44;border-bottom:1px solid #1d3350}
.gc-code-head span{font-size:12.5px;color:#8fb0d8;font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.gc-copy{background:#1f3a5c;color:#cfe2f8;border:1px solid #2c4c73;border-radius:6px;padding:4px 11px;font-size:12.5px;font-weight:700;cursor:pointer;font-family:var(--font)}
.gc-copy:hover{background:#27496f;color:#fff}
.gc-code pre{margin:0;padding:14px 16px;overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.72;color:#dbe7f6}
.gc-code pre .cm{color:#7f9cbd;font-style:italic}
.gc-code pre .kw{color:#7fd4ff;font-weight:700}
.gc-code pre .ad{color:#ffd479}

/* ---------- DECISION MATRIX / CARD GRIDS ---------- */
.gc-grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:0 0 24px}
.gc-grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:0 0 24px}
.gc-card{background:#fff;border:1px solid var(--line);border-radius:11px;padding:17px 19px}
.gc-card h4{margin:0 0 8px;font-size:16px;color:var(--navy);font-weight:750}
.gc-card p{margin:0 0 10px;font-size:15px;color:#47596f}
.gc-card p:last-child,.gc-card ul:last-child{margin-bottom:0}
.gc-card ul{font-size:14.5px;color:#47596f;padding-left:19px}
.gc-card--accent{border-left:4px solid var(--accent);background:#fbfeff}
.gc-card--blue{border-left:4px solid var(--blue);background:#fafcff}
.gc-card--good{border-left:4px solid var(--good);background:var(--goodbg)}
.gc-card--warn{border-left:4px solid var(--warn);background:var(--warnbg)}
.gc-card--bad{border-left:4px solid var(--bad);background:var(--badbg)}

/* numbered step flow */
.gc-steps{counter-reset:gcstep;list-style:none;padding:0;margin:0 0 24px}
.gc-steps li{counter-increment:gcstep;position:relative;padding:0 0 18px 46px;margin:0;border-left:2px solid #dce7f5;margin-left:15px}
.gc-steps li:last-child{border-left-color:transparent;padding-bottom:0}
.gc-steps li::before{content:counter(gcstep);position:absolute;left:-16px;top:-2px;width:31px;height:31px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 4px #fff}
.gc-steps li b{display:block;color:var(--navy);font-size:16px;margin-bottom:4px}
.gc-steps li span{font-size:15px;color:#47596f}

/* symptom / cause / fix block */
.gc-prob{border:1px solid var(--line);border-radius:11px;padding:0;margin:0 0 16px;overflow:hidden;background:#fff}
.gc-prob-h{background:#f7f9fc;padding:12px 17px;border-bottom:1px solid var(--line);font-weight:750;color:var(--navy);font-size:16px}
.gc-prob-b{padding:14px 17px;display:grid;grid-template-columns:104px 1fr;gap:7px 14px;font-size:15px;color:#47596f}
.gc-prob-b dt{font-weight:700;color:#2b4666;margin:0}
.gc-prob-b dd{margin:0}

/* key-value spec strip */
.gc-spec{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:0 0 24px}
.gc-spec div{background:#fff;padding:14px 16px}
.gc-spec dt{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700;margin:0 0 5px}
.gc-spec dd{margin:0;font-size:17px;color:var(--navy);font-weight:750}
.gc-spec dd small{display:block;font-size:12.5px;color:var(--muted);font-weight:500;margin-top:3px}

/* ---------- CALCULATOR WIDGET ---------- */
.gc-calc{border:1px solid #d2e0f1;border-radius:14px;background:linear-gradient(160deg,#fbfdff,#f4f8fd);box-shadow:0 10px 30px rgba(15,39,71,.07);overflow:hidden;margin:0 0 26px}
.gc-calc-head{background:#0f2747;color:#fff;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.gc-calc-head h2,.gc-calc-head h3{margin:0;font-size:17px;font-weight:750;color:#fff;letter-spacing:.01em}
.gc-unit{display:inline-flex;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:8px;padding:3px;gap:2px}
.gc-unit button{background:transparent;border:none;color:#cfe0f5;font-size:13px;font-weight:700;padding:6px 15px;border-radius:6px;cursor:pointer;line-height:1.4}
.gc-unit button.is-on{background:#fff;color:var(--navy)}
.gc-calc-body{display:grid;grid-template-columns:1fr 1fr;gap:0}
.gc-calc-in{padding:22px 24px;border-right:1px solid #e1ebf7}
.gc-calc-out{padding:22px 24px;background:#fff}
.gc-mode{display:flex;gap:8px;margin:0 0 18px}
.gc-mode button{flex:1;background:#fff;border:1.5px solid #cddcee;color:#40546e;border-radius:9px;padding:10px 8px;font-size:14px;font-weight:700;cursor:pointer;line-height:1.35}
.gc-mode button.is-on{border-color:var(--blue);background:#eef5ff;color:var(--blue-d);box-shadow:inset 0 0 0 1px var(--blue)}
.gc-field{margin:0 0 15px}
.gc-field label{display:block;font-size:13.5px;font-weight:700;color:#2b4666;margin:0 0 6px}
.gc-field label em{font-style:normal;color:var(--muted);font-weight:500}
.gc-inputrow{display:flex;align-items:stretch}
.gc-field input{flex:1;width:100%;border:1.5px solid #cddcee;border-radius:9px;padding:11px 13px;font-size:16px;color:var(--navy);background:#fff;font-weight:600;min-width:0}
.gc-inputrow input{border-radius:9px 0 0 9px}
.gc-field input:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(0,82,204,.13)}
.gc-field input.is-bad{border-color:var(--bad);background:#fff6f5}
.gc-suffix{display:flex;align-items:center;padding:0 13px;background:#eef3fa;border:1.5px solid #cddcee;border-left:none;border-radius:0 9px 9px 0;font-size:13.5px;color:#4a5f7a;font-weight:700;white-space:nowrap}
.gc-err{display:block;font-size:12.5px;color:var(--bad);font-weight:600;margin-top:5px;min-height:1px}
.gc-calc-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:4px}
.gc-result{background:linear-gradient(150deg,#f2fbfd,#eaf6fb);border:1px solid #bfe4ee;border-radius:11px;padding:18px 20px;margin:0 0 16px;text-align:center}
.gc-result .lbl{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--accent-d);font-weight:800;margin:0 0 6px}
.gc-result .val{font-size:clamp(30px,5vw,40px);font-weight:800;color:var(--navy);line-height:1.06;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.gc-result .val small{font-size:.42em;font-weight:700;color:#4a5f7a;margin-left:6px;letter-spacing:0}
.gc-result .sub{font-size:14px;color:#43607a;margin:8px 0 0}
.gc-outrow{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed #e2e9f2;font-size:14.5px}
.gc-outrow:last-of-type{border-bottom:none}
.gc-outrow span{color:var(--muted)}
.gc-outrow b{color:var(--navy);font-variant-numeric:tabular-nums;text-align:right}
.gc-outnote{font-size:13px;color:#5f7186;background:#f7f9fc;border:1px solid var(--line);border-radius:8px;padding:10px 13px;margin:14px 0 0}
.gc-flag{display:none;font-size:14px;border-radius:9px;padding:12px 15px;margin:0 0 14px;border:1px solid}
.gc-flag.is-on{display:block}
.gc-flag--warn{background:var(--warnbg);border-color:#f2d5aa;color:#7a4a10}
.gc-flag--bad{background:var(--badbg);border-color:#f4c3bd;color:#8f2419}
.gc-usedeq{font-family:var(--mono);font-size:13px;color:#0d3f8f;background:#f4f7fc;border:1px dashed #cfdcee;border-radius:7px;padding:9px 12px;margin:14px 0 0;overflow-x:auto;white-space:nowrap}

/* ---------- FAQ ---------- */
.gc-faq{border:1px solid var(--line);border-radius:11px;overflow:hidden;background:#fff;margin:0 0 24px}
.gc-faq details{border-bottom:1px solid var(--line)}
.gc-faq details:last-child{border-bottom:none}
.gc-faq summary{cursor:pointer;padding:15px 46px 15px 18px;font-weight:700;color:var(--navy);font-size:16px;position:relative;list-style:none;background:#fff;transition:background .15s}
.gc-faq summary::-webkit-details-marker{display:none}
.gc-faq summary:hover{background:#f7fafd}
.gc-faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:22px;font-weight:400;color:var(--accent);line-height:1}
.gc-faq details[open] summary{background:#f7fafd}
.gc-faq details[open] summary::after{content:"–"}
.gc-faq .a{padding:2px 20px 18px;font-size:15.5px;color:#47596f}
.gc-faq .a p:last-child{margin-bottom:0}

/* ---------- TOPIC CLUSTER HUB ---------- */
.gc-hub{display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));gap:15px;margin:0 0 26px}
.gc-hubcard{display:block;border:1px solid var(--line);border-radius:11px;padding:16px 18px;background:#fff;transition:border-color .15s,box-shadow .15s,transform .15s}
.gc-page a.gc-hubcard:hover{border-color:#b9cde8;box-shadow:0 8px 22px rgba(15,39,71,.08);transform:translateY(-2px);text-decoration:none}
.gc-hubcard .k{font-size:11.5px;text-transform:uppercase;letter-spacing:.09em;font-weight:800;color:var(--accent-d);margin:0 0 7px}
.gc-hubcard .t{font-size:16px;font-weight:750;color:var(--navy);margin:0 0 6px;line-height:1.32}
.gc-hubcard .d{font-size:14px;color:#5b6b7f;margin:0;line-height:1.55}
.gc-hubcard--self{background:#f4f8ff;border-color:#c6d9f2;border-left:4px solid var(--blue)}
.gc-hubcard--self .k{color:var(--blue-d)}
.gc-soon{opacity:.72;background:#fafbfc}
.gc-soon .t{color:#54657d}
.gc-soon .k::after{content:" · coming soon"}

/* related links inline */
.gc-rel{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:0 0 24px}
.gc-rel a{display:block;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:9px;padding:13px 16px;background:#fff}
.gc-page .gc-rel a:hover{background:#f7fbfd;text-decoration:none;border-left-color:var(--blue)}
.gc-rel b{display:block;color:var(--navy);font-size:15.5px;margin-bottom:3px}
.gc-rel span{font-size:13.5px;color:var(--muted)}

/* ---------- AUTHOR / E-E-A-T ---------- */
.gc-author{display:flex;gap:18px;align-items:flex-start;background:#f7fafd;border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:26px 0 0}
.gc-author-badge{flex:0 0 54px;width:54px;height:54px;border-radius:12px;background:linear-gradient(145deg,var(--blue),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;letter-spacing:.02em}
.gc-author h3{margin:0 0 6px;font-size:16.5px;color:var(--navy);font-weight:750}
.gc-author p{margin:0 0 8px;font-size:14.5px;color:#4d5f78}
.gc-author p:last-child{margin-bottom:0}
.gc-author .meta{font-size:13px;color:var(--muted)}

/* ---------- FINAL CTA ---------- */
.gc-cta{background:linear-gradient(145deg,#0f2747,#123763 55%,#0d4f6b);border-radius:16px;padding:40px 42px;margin:34px 0 10px;color:#fff;position:relative;overflow:hidden}
.gc-cta::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:34px 34px;-webkit-mask-image:radial-gradient(ellipse 70% 100% at 88% 20%,#000,transparent 78%);mask-image:radial-gradient(ellipse 70% 100% at 88% 20%,#000,transparent 78%)}
.gc-cta>*{position:relative;z-index:1}
.gc-cta h2{margin:0 0 12px;font-size:clamp(22px,3vw,29px);color:#fff;font-weight:800;line-height:1.22}
.gc-cta p{color:#c8dcf2;font-size:16px;max-width:660px;margin:0 0 18px}
.gc-cta ul{list-style:none;padding:0;margin:0 0 24px;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:9px}
.gc-cta li{color:#d5e6f7;font-size:14.5px;padding-left:24px;position:relative}
.gc-cta li::before{content:"✓";position:absolute;left:0;color:#4fd1e8;font-weight:800}
.gc-cta-btns{display:flex;flex-wrap:wrap;gap:12px}
.gc-cta .gc-btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.gc-cta .gc-btn--ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}
.gc-cta .gc-btn--white{background:#fff;color:var(--navy)}
.gc-cta .gc-btn--white:hover{background:#eaf3ff;color:var(--navy)}

/* mid-page inline CTA strip */
.gc-inlinecta{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;background:#f4f8ff;border:1px solid #cfdcee;border-left:4px solid var(--blue);border-radius:11px;padding:18px 22px;margin:26px 0}
.gc-inlinecta div{flex:1 1 320px}
.gc-inlinecta b{display:block;color:var(--navy);font-size:16.5px;margin-bottom:4px}
.gc-inlinecta span{font-size:14.5px;color:#4d5f78}

/* ---------- MODAL ---------- */
.gc-modal{display:none;position:fixed;inset:0;z-index:99999;background:rgba(10,22,40,.62);backdrop-filter:blur(3px);align-items:center;justify-content:center;padding:22px}
.gc-modal.is-open{display:flex}
.gc-modal-box{position:relative;width:100%;max-width:760px;height:min(86vh,760px);background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 26px 70px rgba(0,0,0,.4)}
.gc-modal-box iframe{width:100%;height:100%;border:0;display:block}
.gc-modal-x{position:absolute;top:10px;right:12px;z-index:2;width:34px;height:34px;border-radius:50%;border:none;background:rgba(15,39,71,.82);color:#fff;font-size:19px;line-height:1;cursor:pointer;font-weight:700}
.gc-modal-x:hover{background:#0f2747}

/* ---------- RESPONSIVE ---------- */
@media(max-width:1000px){
  .gc-hero-grid{grid-template-columns:1fr;gap:26px}
  .gc-calc-body{grid-template-columns:1fr}
  .gc-calc-in{border-right:none;border-bottom:1px solid #e1ebf7}
}
@media(max-width:820px){
  .gc-grid2,.gc-rel{grid-template-columns:1fr}
  .gc-cta{padding:30px 24px}
  .gc-author{flex-direction:column;gap:14px}
}
@media(max-width:640px){
  .gc-page{font-size:16px}
  .gc-hero{padding:34px 0 30px}
  .gc-wrap{padding:0 16px}
  .gc-page section{padding:30px 0 4px}
  .gc-subnav-inner{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding:6px 12px}
  .gc-subnav-inner::-webkit-scrollbar{display:none}
  .gc-subnav-cta{display:none}
  .gc-prob-b{grid-template-columns:1fr;gap:2px 0}
  .gc-prob-b dt{margin-top:8px}
  .gc-fml .eq{white-space:normal;word-break:break-word}
  .gc-inlinecta{flex-direction:column;align-items:flex-start}
  .gc-calc-in,.gc-calc-out{padding:18px 16px}
  .gc-modal{padding:0}
  .gc-modal-box{height:100vh;max-width:100%;border-radius:0}
}
@media print{
  .gc-subnav,.gc-modal,.gc-cta-btns,.gc-hero-cta{display:none!important}
  .gc-page{font-size:12pt}
}