/* ============================================================
   온라인 쇼핑몰 창업 정보 — 디자인 시스템
   로열블루 × 딥네이비 × 아이보리 / Pretendard + Noto Serif KR
   ============================================================ */
:root{
  --blue-700:#0F2E5C;   /* 딥네이비 */
  --blue-600:#123A74;
  --blue-500:#1E5BC6;   /* 로열블루(주) */
  --blue-400:#4A83E0;
  --blue-200:#C9DCF7;
  --blue-100:#EAF1FC;
  --blue-050:#F5F9FE;
  --mint-500:#2FC4A0;
  --mint-050:#E6F7F2;
  --amber-500:#F08A24;
  --ink-900:#16233A;
  --ink-700:#2E3B52;
  --ink-500:#5A6B85;
  --ink-400:#71829C;
  --ink-300:#98A6BC;
  --line:#E4EAF3;
  --bg:#FFFFFF;
  --bg-soft:#F7F9FC;
  --bg-blue:#EAF1FC;
  --white:#FFFFFF;
  --radius-sm:8px; --radius-md:14px; --radius-lg:22px; --radius-full:999px;
  --shadow-sm:0 1px 2px rgba(15,46,92,.06),0 4px 12px rgba(15,46,92,.05);
  --shadow-md:0 2px 4px rgba(15,46,92,.06),0 14px 34px rgba(15,46,92,.10);
  --shadow-lg:0 6px 16px rgba(15,46,92,.08),0 30px 60px rgba(15,46,92,.14);
  --space-1:8px; --space-2:16px; --space-3:24px; --space-4:32px; --space-5:48px; --space-6:72px; --space-7:96px; --space-8:128px;
  --content-w:1180px; --article-w:780px;
  --font-sans:'Pretendard','Pretendard Variable','Noto Sans KR','Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  --font-serif:'Noto Serif KR','Georgia','Times New Roman',serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--ink-700);background:var(--bg);word-break:keep-all;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-500);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--blue-600)}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink-900);line-height:1.35;margin:0;letter-spacing:-.01em}
p{margin:0 0 1.15em}
:focus-visible{outline:3px solid var(--blue-400);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--blue-600);color:#fff;padding:12px 20px;border-radius:0 0 10px 0}
.skip-link:focus{left:0;color:#fff}
.container{width:100%;max-width:var(--content-w);margin:0 auto;padding:0 24px}
.section{padding:var(--space-7) 0}
.section-tight{padding:var(--space-5) 0}
.section-alt{background:var(--bg-soft)}
.section-blue{background:var(--bg-blue)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--blue-500);text-transform:uppercase}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--blue-500);border-radius:2px}
.section-head{margin-bottom:var(--space-5)}
.section-head h2{font-size:clamp(26px,3.4vw,38px);margin:10px 0 12px}
.section-head p{color:var(--ink-500);font-size:16.5px;max-width:640px;margin:0}

/* ── 버튼 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 24px;border-radius:var(--radius-full);font-weight:700;font-size:15.5px;letter-spacing:-.01em;border:1px solid transparent;cursor:pointer;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);font-family:var(--font-sans)}
.btn-primary{background:var(--blue-500);color:#fff;box-shadow:0 8px 20px rgba(30,91,198,.28)}
.btn-primary:hover{background:var(--blue-600);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(30,91,198,.34)}
.btn-ghost{background:transparent;color:var(--blue-600);border-color:var(--blue-200)}
.btn-ghost:hover{background:var(--blue-100);color:var(--blue-700);border-color:var(--blue-400)}
.btn-white{background:#fff;color:var(--blue-600);box-shadow:var(--shadow-md)}
.btn-white:hover{background:var(--blue-050);color:var(--blue-700);transform:translateY(-2px)}
.btn-sm{min-height:42px;padding:9px 18px;font-size:14px}

/* ── 헤더 ── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .25s var(--ease)}
.site-header.scrolled{box-shadow:0 6px 24px rgba(15,46,92,.07)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.brand{display:inline-flex;align-items:center;gap:12px;min-height:44px}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--blue-600),var(--blue-500));color:#fff;display:grid;place-items:center;font-family:var(--font-serif);font-weight:700;font-size:17px;box-shadow:0 6px 14px rgba(30,91,198,.3);flex:none}
.brand-name{font-family:var(--font-serif);font-weight:700;font-size:17.5px;color:var(--ink-900);letter-spacing:-.01em;line-height:1.25;display:flex;flex-direction:column}
.brand-name small{font-family:var(--font-sans);font-size:11px;font-weight:600;color:var(--ink-400);letter-spacing:.06em}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{color:var(--ink-700);font-weight:600;font-size:15px;padding:10px 14px;border-radius:10px;min-height:44px;display:inline-flex;align-items:center}
.main-nav a:hover{color:var(--blue-600);background:var(--bg-blue)}
.nav-toggle{display:none;width:46px;height:46px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{width:20px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .25s var(--ease),opacity .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ── 히어로 ── */
.hero{position:relative;background:linear-gradient(160deg,var(--blue-050) 0%,#FFFFFF 46%,var(--bg-blue) 100%);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(720px 420px at 82% 8%,rgba(74,131,224,.16),transparent 62%),radial-gradient(560px 380px at 6% 92%,rgba(47,196,160,.12),transparent 60%);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:var(--space-7) 0 var(--space-7)}
.hero-copy .hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--blue-200);color:var(--blue-600);font-size:13.5px;font-weight:700;padding:8px 16px;border-radius:var(--radius-full);box-shadow:var(--shadow-sm)}
.hero-copy h1{font-size:clamp(38px,5.4vw,60px);line-height:1.18;margin:22px 0 20px;letter-spacing:-.025em}
.hero-copy h1 em{font-style:normal;color:var(--blue-500)}
.hero-copy .hero-lead{font-size:clamp(16px,1.6vw,18.5px);color:var(--ink-500);line-height:1.8;max-width:540px;margin:0 0 30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-note{margin-top:18px;font-size:13px;color:var(--ink-400)}
.hero-media{position:relative}
.hero-img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);aspect-ratio:3/2;object-fit:cover;width:100%}
.hero-img-card{overflow:hidden;border-radius:var(--radius-lg)}
.hero-float{position:absolute;left:-26px;bottom:34px;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:16px;padding:14px 18px;box-shadow:var(--shadow-md);display:flex;align-items:center;gap:12px}
.hero-float .dot{width:38px;height:38px;border-radius:12px;background:var(--mint-050);color:var(--mint-500);display:grid;place-items:center;font-size:18px;font-weight:800}
.hero-float b{display:block;font-size:14px;color:var(--ink-900)}
.hero-float span{font-size:12.5px;color:var(--ink-400)}

/* ── 스탯 스트립 ── */
.stat-strip{border-top:1px solid var(--line);background:var(--bg-soft)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:var(--space-4) 0}
.stat-item{text-align:center}
.stat-item b{display:block;font-family:var(--font-serif);font-size:clamp(24px,2.6vw,34px);color:var(--blue-600)}
.stat-item span{font-size:13.5px;color:var(--ink-500);font-weight:600}

/* ── 카드 ── */
.article-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;transition:transform .25s var(--ease),box-shadow .25s var(--ease);box-shadow:var(--shadow-sm)}
.article-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--blue-200)}
.article-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-blue)}
.article-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.article-card:hover .thumb img{transform:scale(1.045)}
.article-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.article-card .cat{font-size:12.5px;font-weight:700;color:var(--blue-500);letter-spacing:.02em}
.article-card h3{font-family:var(--font-sans);font-size:17.5px;font-weight:700;color:var(--ink-900);line-height:1.45;letter-spacing:-.01em}
.article-card:hover h3{color:var(--blue-600)}
.article-card p{font-size:14px;color:var(--ink-500);line-height:1.65;margin:0}
.article-card .meta{margin-top:auto;padding-top:6px;font-size:12.5px;color:var(--ink-400);display:flex;gap:10px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* ── 캐러셀 ── */
.carousel{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,1fr);gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 22px;scrollbar-width:thin;scrollbar-color:var(--blue-200) transparent}
.carousel::-webkit-scrollbar{height:8px}
.carousel::-webkit-scrollbar-thumb{background:var(--blue-200);border-radius:8px}
.carousel .article-card{scroll-snap-align:start;min-width:0}

/* ── 카테고리 타일 ── */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.cat-tile{position:relative;border-radius:var(--radius-lg);overflow:hidden;min-height:180px;display:flex;align-items:flex-end;padding:22px;color:#fff;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.cat-tile:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.cat-tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cat-tile .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,46,92,0) 30%,rgba(15,46,92,.72) 100%)}
.cat-tile .tile-txt{position:relative;z-index:2}
.cat-tile b{display:block;font-family:var(--font-serif);font-size:18px;letter-spacing:-.01em}
.cat-tile span{font-size:12.5px;opacity:.85}

/* ── 절차(프로세스) ── */
.process-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:center}
.process-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);aspect-ratio:3/2;object-fit:cover;width:100%}
.step-list{list-style:none;margin:0;padding:0;counter-reset:step}
.step-list li{position:relative;padding:0 0 26px 64px;counter-increment:step}
.step-list li::before{content:counter(step);position:absolute;left:0;top:0;width:42px;height:42px;border-radius:50%;background:var(--blue-500);color:#fff;font-weight:800;font-size:16px;display:grid;place-items:center;box-shadow:0 6px 14px rgba(30,91,198,.28);font-family:var(--font-serif)}
.step-list li:not(:last-child)::after{content:"";position:absolute;left:20px;top:46px;bottom:2px;width:2px;background:var(--blue-200)}
.step-list h3{font-family:var(--font-sans);font-size:17px;font-weight:700;color:var(--ink-900);margin:2px 0 6px}
.step-list p{font-size:14.5px;color:var(--ink-500);margin:0}

/* ── 인포그래픽(비용) ── */
.cost-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.cost-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);width:100%}
.cost-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cost-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.cost-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.cost-card .ico{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:19px;margin-bottom:12px;color:#fff;font-weight:800}
.cost-card h3{font-family:var(--font-sans);font-size:15.5px;margin-bottom:4px}
.cost-card p{font-size:13.5px;color:var(--ink-500);margin:0}

/* ── CTA ── */
.cta-banner{position:relative;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--blue-700),var(--blue-500));padding:clamp(40px,6vw,72px);color:#fff;overflow:hidden;box-shadow:var(--shadow-lg)}
.cta-banner::before{content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-banner::after{content:"";position:absolute;right:60px;bottom:-120px;width:240px;height:240px;border-radius:50%;background:rgba(47,196,160,.18)}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:clamp(24px,3vw,34px);margin:8px 0 10px}
.cta-inner p{color:rgba(255,255,255,.82);margin:0;max-width:560px;font-size:15.5px}
.cta-inner .btn{margin-top:8px}

/* ── 푸터 ── */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:0}
.footer-top{padding:var(--space-6) 0 var(--space-5)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-name small{color:rgba(255,255,255,.5)}
.footer-desc{font-size:14px;line-height:1.75;color:rgba(255,255,255,.62);max-width:360px;margin:0}
.footer-grid h4{color:#fff;font-family:var(--font-sans);font-size:15px;font-weight:700;margin:0 0 16px}
.footer-grid a{display:block;color:rgba(255,255,255,.66);font-size:14px;padding:5px 0;min-height:30px}
.footer-grid a:hover{color:#fff}
.legal-notice{margin-top:var(--space-5);padding-top:var(--space-3);border-top:1px solid rgba(255,255,255,.12);font-size:12.5px;line-height:1.75;color:rgba(255,255,255,.5)}
.legal-notice p{margin:0 0 8px}
.footer-bottom{background:rgba(0,0,0,.22);padding:20px 0}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-copy{font-size:13px;color:rgba(255,255,255,.55);margin:0}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{color:rgba(255,255,255,.6);font-size:13px;min-height:36px;display:inline-flex;align-items:center}

/* ── 글(싱글) ── */
.single-post .post-hero{background:linear-gradient(180deg,var(--bg-blue),#fff);padding:var(--space-5) 0 var(--space-4)}
.breadcrumb{font-size:13px;color:var(--ink-400);font-weight:600;margin-bottom:14px}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--blue-500)}
.post-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--ink-400);margin-bottom:14px}
.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--radius-full);font-size:12.5px;font-weight:700}
.badge-blue{background:var(--blue-500);color:#fff}
.single-post h1{font-size:clamp(28px,4vw,44px);line-height:1.3;letter-spacing:-.02em;max-width:820px}
.post-lead{font-size:17px;color:var(--ink-500);line-height:1.8;max-width:760px;margin:16px 0 0}
.page-content{padding:var(--space-5) 0 var(--space-7)}
.article-shell{max-width:var(--article-w)}
.post-thumb{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);margin:var(--space-3) 0 var(--space-4)}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-md);padding:20px 24px;margin:0 0 var(--space-4)}
.toc-title{font-family:var(--font-sans);font-size:14px;font-weight:800;color:var(--ink-900);margin-bottom:10px}
.toc ol{margin:0;padding-left:20px;display:grid;gap:6px}
.toc a{font-size:14px;color:var(--ink-500);font-weight:600}
.toc a:hover{color:var(--blue-500)}
.prose{font-size:17px;line-height:1.85;color:var(--ink-700)}
.prose h2{font-size:clamp(23px,2.8vw,30px);margin:var(--space-6) 0 var(--space-3);padding-bottom:14px;border-bottom:2px solid var(--blue-100);scroll-margin-top:96px;letter-spacing:-.015em}
.prose h2::before{content:"";display:block;width:38px;height:4px;border-radius:4px;background:var(--blue-500);margin-bottom:14px}
.prose h3{font-size:19px;margin:var(--space-4) 0 var(--space-2);color:var(--ink-900);font-family:var(--font-sans);font-weight:800;letter-spacing:-.01em}
.prose p{margin:0 0 1.3em}
.prose ul,.prose ol{margin:0 0 1.4em;padding-left:22px;display:grid;gap:8px}
.prose li::marker{color:var(--blue-500);font-weight:700}
.prose strong{color:var(--ink-900)}
.prose a{font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--blue-200)}
.prose a:hover{text-decoration-color:var(--blue-500)}
.post-figure{margin:var(--space-4) 0;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-soft)}
.post-figure img{width:100%}
.post-figure figcaption{font-size:13px;color:var(--ink-400);padding:12px 16px;text-align:center}
.table-scroll{overflow-x:auto;margin:var(--space-3) 0;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}
.cmp-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
.cmp-table th{background:var(--blue-600);color:#fff;text-align:left;padding:12px 16px;font-weight:700;font-size:13.5px;letter-spacing:.01em}
.cmp-table td{padding:12px 16px;border-top:1px solid var(--line);vertical-align:top;color:var(--ink-700)}
.cmp-table tbody tr:nth-child(even){background:var(--bg-soft)}
.cmp-table tbody tr:hover{background:var(--bg-blue)}
.callout{background:var(--blue-050);border-left:4px solid var(--blue-500);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:20px 24px;margin:var(--space-3) 0;color:var(--ink-700)}
.callout p{margin:0;font-size:15.5px}
.callout strong{color:var(--blue-600)}
.chart-block{margin:var(--space-3) 0;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 24px;display:grid;gap:14px}
.chart-row{display:grid;grid-template-columns:96px 1fr 92px;align-items:center;gap:12px;font-size:13.5px}
.chart-label{font-weight:700;color:var(--ink-900);text-align:right}
.chart-track{height:14px;background:var(--blue-100);border-radius:999px;overflow:hidden}
.chart-bar{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--blue-500),var(--blue-400));min-width:4px}
.chart-value{color:var(--ink-400);font-size:12.5px}
.related{margin-top:var(--space-6);padding-top:var(--space-4);border-top:2px solid var(--blue-100)}
.related h2{font-size:24px;margin:0 0 var(--space-3)}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:var(--space-5);font-size:14px;font-weight:600}
.article-nav a{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-md);padding:14px 18px;color:var(--ink-700);flex:1;min-height:48px;display:flex;align-items:center}
.article-nav a:hover{border-color:var(--blue-300,var(--blue-200));color:var(--blue-600);background:var(--bg-blue)}
.ai-notice,.legal-notice{font-size:13px}

/* ── 아카이브/목록 ── */
.archive-hero{background:linear-gradient(180deg,var(--bg-blue),#fff);padding:var(--space-5) 0 var(--space-4);text-align:center}
.archive-hero h1{font-size:clamp(28px,3.6vw,42px);margin-top:12px}
.archive-hero p{color:var(--ink-500);max-width:640px;margin:12px auto 0;font-size:16px}
.archive-list{padding:var(--space-5) 0 var(--space-7)}
.archive-list .article-card{flex-direction:row;align-items:stretch;margin-bottom:24px}
.archive-list .thumb{width:38%;aspect-ratio:16/10;flex:none}
.archive-list .body h3{font-size:19px}
.empty{text-align:center;color:var(--ink-400);padding:60px 0}

/* ── 페이지 ── */
.page-content .prose{max-width:var(--article-w)}

/* ── 모바일 내비 ── */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-media{order:2}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .process-wrap,.cost-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav-toggle{display:flex}
  .main-nav{position:fixed;inset:72px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:12px 20px 22px;gap:2px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .22s var(--ease),transform .22s var(--ease);box-shadow:var(--shadow-md);max-height:calc(100vh - 80px);overflow-y:auto}
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .main-nav a{padding:13px 14px;font-size:16px;min-height:48px}
  .main-nav .nav-cta{margin-top:8px}
}
@media (max-width:640px){
  .container{padding:0 18px}
  .section{padding:var(--space-6) 0}
  .card-grid,.related-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr 1fr}
  .cost-cards{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .archive-list .article-card{flex-direction:column}
  .archive-list .thumb{width:100%;aspect-ratio:16/9}
  .hero-float{left:12px;bottom:14px;padding:10px 14px}
  .chart-row{grid-template-columns:76px 1fr 70px;gap:8px;font-size:12.5px}
  .cmp-table{font-size:13.5px}
  .prose{font-size:16px}
  .hero-copy h1{font-size:clamp(32px,9vw,42px)}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .article-card:hover,.cat-tile:hover{transform:none}
}