/* ============================================================
   SUBBOT · subbot.kr — shared stylesheet
   Base design system (mirrors index.html) + column/article components
   ============================================================ */
:root{
    --navy:#0b1b33;
    --navy-2:#10274a;
    --navy-3:#1a3a5f;
    --blue:#3498db;
    --cyan:#61dafb;
    --gold:#f1c40f;
    --ink:#1f2937;
    --ink-2:#4b5563;
    --muted:#6b7280;
    --bg:#f4f7fb;
    --card:#ffffff;
    --border:#e5eaf1;
    --radius-lg:22px;
    --radius-md:14px;
    --shadow-lg:0 20px 50px rgba(15,34,60,.10);
    --shadow-md:0 8px 24px rgba(15,34,60,.08);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;font-family:'Noto Sans KR',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--blue);color:#fff}

/* Skip link (a11y) */
.skip-link{position:absolute;left:-9999px;top:8px;background:#0b1b33;color:#fff;padding:10px 16px;border-radius:8px;font-weight:700;z-index:200}
.skip-link:focus{left:12px;outline:2px solid var(--cyan)}

/* ============ SITE NAV ============ */
.site-nav{
    position:sticky;top:0;left:0;right:0;z-index:100;
    background:rgba(11,27,51,.72);
    backdrop-filter:saturate(150%) blur(14px);
    -webkit-backdrop-filter:saturate(150%) blur(14px);
    border-bottom:1px solid rgba(255,255,255,.08);
    color:#fff;
}
.nav-inner{max-width:1280px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:18px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.01em;color:#fff}
.brand img{border-radius:8px;display:block}
.brand-text{display:inline-flex;align-items:baseline;gap:8px;font-family:'Outfit',sans-serif;font-size:20px;font-weight:900}
.brand-text em{font-style:normal;font-family:'Noto Sans KR',sans-serif;font-size:13px;font-weight:700;color:var(--cyan);letter-spacing:0}
.primary-nav{margin-left:16px;flex:1}
.primary-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:6px;justify-content:center}
.primary-nav a{display:inline-block;padding:10px 14px;border-radius:999px;font-size:14.5px;font-weight:700;color:#dbe6f3;transition:background .15s, color .15s}
.primary-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.primary-nav a.active{background:rgba(52,152,219,.18);color:#fff}
.nav-cta{display:inline-flex;align-items:center;padding:10px 18px;border-radius:999px;background:linear-gradient(135deg,#3498db,#61dafb);color:#0b1b33;font-weight:800;font-size:14px;box-shadow:0 8px 20px rgba(52,152,219,.35);transition:transform .15s}
.nav-cta:hover{transform:translateY(-1px)}
.nav-toggle{display:none;background:transparent;border:0;padding:8px;margin-left:auto;cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;border-radius:2px;transition:transform .25s, 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)}
.mobile-menu{border-top:1px solid rgba(255,255,255,.08);background:rgba(11,27,51,.95)}
.mobile-menu ul{list-style:none;margin:0;padding:10px 16px 14px;display:grid;grid-template-columns:1fr 1fr;gap:6px}
.mobile-menu a{display:block;padding:12px 14px;border-radius:10px;color:#e6f1ff;font-weight:700;background:rgba(255,255,255,.04)}
.mobile-menu a:hover{background:rgba(255,255,255,.08)}

/* ============ SHARED BUTTONS ============ */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;font-weight:800;font-size:15px;letter-spacing:.01em;transition:transform .15s ease, box-shadow .15s ease, background .2s;border:1px solid transparent;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,#3498db,#1a3a5f);color:#fff;box-shadow:0 10px 30px rgba(52,152,219,.35)}
.btn-primary:hover{box-shadow:0 14px 36px rgba(52,152,219,.5)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-kakao{background:#FEE500;color:#181600;box-shadow:0 10px 26px rgba(254,229,0,.35)}
.btn-kakao:hover{background:#FFD900;box-shadow:0 14px 32px rgba(254,229,0,.5)}
.btn-outline{background:#fff;color:var(--navy-3);border-color:#c9e3f8}
.btn-outline:hover{background:#f4f8fc}

/* ============ SECTION HELPERS ============ */
.section-title{display:flex;align-items:center;gap:14px;margin:0 0 18px}
.section-title::before{content:"";display:inline-block;width:6px;height:24px;border-radius:4px;background:linear-gradient(180deg,#3498db,#1a3a5f)}
.section-title h2{font-size:clamp(20px,2.4vw,26px);margin:0;color:var(--navy-3);font-weight:900;letter-spacing:-.01em}
.section-title .tag{margin-left:auto;font-size:12px;font-weight:800;letter-spacing:.08em;background:#eaf4fd;color:#1a3a5f;padding:6px 10px;border-radius:999px}

/* ============ COLUMN HERO (article + list) ============ */
.col-hero{position:relative;color:#fff;overflow:hidden;isolation:isolate}
.col-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(1000px 500px at 85% 8%, rgba(52,152,219,.35), transparent 60%),radial-gradient(800px 460px at 8% 92%, rgba(97,218,251,.20), transparent 60%),linear-gradient(135deg,#0b1b33 0%,#10274a 45%,#1a3a5f 100%);z-index:-2}
.col-hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);background-size:56px 56px;mask-image:radial-gradient(1100px 620px at 50% 30%, #000 50%, transparent 82%);-webkit-mask-image:radial-gradient(1100px 620px at 50% 30%, #000 50%, transparent 82%);z-index:-1}
.col-hero-inner{max-width:900px;margin:0 auto;padding:64px 24px 92px}
.col-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);font-size:13px;font-weight:700;color:#cfe6ff}
.col-hero .eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--gold);box-shadow:0 0 12px var(--gold)}
.col-hero h1{font-size:clamp(27px,4.4vw,44px);font-weight:900;line-height:1.22;letter-spacing:-.02em;margin:18px 0 12px}
.col-hero h1 .grad{background:linear-gradient(90deg,#61dafb 0%,#3498db 50%,#f1c40f 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.col-hero .sub{color:#d9e4f2;font-size:clamp(15px,1.7vw,18px);max-width:680px;margin:0}
.col-hero .meta-row{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:22px;color:#bcd0e8;font-size:13.5px;font-weight:600}
.col-hero .meta-row .chip{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);padding:6px 12px;border-radius:999px}

/* ============ BREADCRUMB ============ */
.breadcrumb{font-size:13px;color:#bcd0e8}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px}
.breadcrumb li+li::before{content:"›";opacity:.6;margin-right:2px}
.breadcrumb a{color:#cfe6ff;font-weight:700}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb [aria-current]{color:#fff;font-weight:700}

/* ============ ARTICLE WRAPPER ============ */
main.col-main{max-width:900px;margin:-56px auto 0;padding:0 24px 64px;position:relative;z-index:2}
.article-card{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:44px 44px 40px}

/* Prose */
.prose{color:var(--ink);font-size:16.5px}
.prose>p{margin:0 0 18px;color:var(--ink-2)}
.prose h2{font-size:clamp(21px,2.6vw,27px);color:var(--navy-3);font-weight:900;letter-spacing:-.01em;margin:40px 0 14px;padding-top:8px;scroll-margin-top:84px;display:flex;align-items:center;gap:12px}
.prose h2::before{content:"";flex:none;width:6px;height:24px;border-radius:4px;background:linear-gradient(180deg,#3498db,#1a3a5f)}
.prose h3{font-size:19px;color:var(--navy-3);font-weight:800;margin:28px 0 8px;scroll-margin-top:84px}
.prose strong{color:var(--navy-3);font-weight:800}
.prose a{color:var(--blue);font-weight:700;text-decoration:underline;text-underline-offset:2px;text-decoration-color:rgba(52,152,219,.4)}
.prose a:hover{text-decoration-color:var(--blue)}
.prose ul,.prose ol{padding-left:22px;margin:8px 0 20px}
.prose li{margin:7px 0;color:var(--ink-2)}
.prose blockquote{margin:22px 0;padding:16px 20px;border-left:5px solid var(--blue);background:#f4f9fe;border-radius:0 12px 12px 0;color:var(--navy-3);font-weight:600}
.prose blockquote p{margin:0}

/* Lead paragraph */
.lead-p{font-size:18px;color:var(--ink-2);line-height:1.8;margin:0 0 22px;padding-bottom:22px;border-bottom:1px solid var(--border)}

/* Key takeaway / definition box (snippet bait) */
.keybox{margin:22px 0;padding:20px 22px;border-radius:16px;background:linear-gradient(180deg,#f8fbff,#f2f8ff);border:1px solid #d7e8fa}
.keybox .keybox-label{display:inline-flex;align-items:center;gap:6px;font-family:'Outfit',sans-serif;font-size:11.5px;font-weight:900;letter-spacing:.12em;color:#1a3a5f;background:#e3f0fc;padding:4px 10px;border-radius:999px;margin-bottom:8px}
.keybox p{margin:0;color:var(--ink);font-size:16px;line-height:1.75}
.keybox strong{color:var(--navy-3)}

/* Callout / note */
.callout{display:flex;gap:14px;margin:22px 0;padding:18px 20px;border-radius:14px;background:#fff8e8;border:1px solid #f5e2ad}
.callout .cico{flex:none;width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#f1c40f,#e0a800);color:#3b2a00;display:flex;align-items:center;justify-content:center;font-weight:900}
.callout p{margin:0;color:#6a5400;font-weight:600;font-size:15px}
.callout.tip{background:#eefaf1;border-color:#bfe6c9}
.callout.tip .cico{background:linear-gradient(135deg,#22c55e,#15a34a);color:#fff}
.callout.tip p{color:#1a6b34}

/* Figures / screenshots */
figure.shot{margin:26px 0;border-radius:16px;overflow:hidden;border:1px solid var(--border);background:#0b1b33;box-shadow:var(--shadow-md)}
figure.shot img{width:100%;display:block}
figure.shot figcaption{padding:12px 16px;font-size:13.5px;color:#cfe0f3;background:linear-gradient(135deg,#1a3a5f,#10274a);font-weight:600}
figure.shot figcaption b{color:#fff;font-weight:800}
.shot-callouts{display:flex;flex-wrap:wrap;gap:8px;margin:-14px 0 26px}
.shot-callouts span{font-size:12.5px;font-weight:700;color:#1a3a5f;background:#eaf4fd;border:1px solid #d3e7fa;padding:5px 11px;border-radius:999px}
.shot-callouts span::before{content:"◆";color:var(--blue);margin-right:5px;font-size:9px;vertical-align:middle}

/* Flow diagram (Keyword → Content → ...) */
.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:10px;margin:24px 0}
.flow .step{flex:1 1 120px;min-width:120px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px 14px;text-align:center;position:relative}
.flow .step .st-n{font-family:'Outfit',sans-serif;font-size:12px;font-weight:900;color:#fff;background:linear-gradient(135deg,#3498db,#1a3a5f);width:26px;height:26px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;margin-bottom:8px}
.flow .step b{display:block;color:var(--navy-3);font-size:14.5px;font-weight:800;margin-bottom:2px}
.flow .step span{font-size:12.5px;color:var(--muted)}
.flow .arrow{align-self:center;color:var(--blue);font-weight:900;font-size:18px;flex:none}

/* Data table */
.table-wrap{overflow-x:auto;border-radius:14px;border:1px solid var(--border);margin:22px 0}
.prose table{width:100%;border-collapse:collapse;min-width:520px;background:#fff}
.prose th{background:#f7fafd;padding:13px 14px;font-size:13.5px;font-weight:800;color:var(--navy-3);border-bottom:1px solid var(--border);text-align:left}
.prose td{padding:12px 14px;border-bottom:1px solid #f1f5f9;font-size:14.5px;color:var(--ink);vertical-align:top}
.prose td:first-child{font-weight:700;color:var(--navy-3);background:#fbfcfe}
.prose tr:last-child td{border-bottom:0}

/* In-article TOC */
.toc{margin:0 0 26px;padding:18px 20px;border-radius:16px;background:#f7fafd;border:1px solid var(--border)}
.toc .toc-h{font-family:'Outfit',sans-serif;font-size:12px;font-weight:900;letter-spacing:.1em;color:var(--muted);margin-bottom:10px}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:toc;display:grid;gap:6px}
.toc li{counter-increment:toc}
.toc a{display:flex;gap:10px;color:var(--ink-2);font-weight:600;font-size:14.5px;padding:2px 0}
.toc a::before{content:counter(toc,decimal-leading-zero);font-family:'Outfit',sans-serif;font-weight:900;color:var(--blue);font-size:13px}
.toc a:hover{color:var(--navy-3)}

/* Inline article FAQ */
.article-faq details{border:1px solid var(--border);border-radius:14px;padding:16px 18px;margin:10px 0;background:#fff;transition:background .2s, border-color .2s}
.article-faq details[open]{background:#f8fbff;border-color:#c9e3f8}
.article-faq summary{font-weight:800;cursor:pointer;color:var(--navy-3);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.article-faq summary::-webkit-details-marker{display:none}
.article-faq summary::after{content:"+";font-family:'Outfit',sans-serif;font-weight:800;font-size:22px;color:var(--blue);transition:transform .2s}
.article-faq details[open] summary::after{content:"−"}
.article-faq details p{margin:10px 0 0;color:var(--ink-2);font-size:14.5px;line-height:1.7}

/* Author / meta strip */
.byline{display:flex;align-items:center;gap:12px;margin:0 0 26px;padding:14px 0;border-bottom:1px solid var(--border)}
.byline .ava{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#1a3a5f,#0b1b33);color:#fff;display:flex;align-items:center;justify-content:center;font-family:'Outfit',sans-serif;font-weight:900;font-size:15px}
.byline .who b{display:block;color:var(--navy-3);font-size:14.5px;font-weight:800}
.byline .who span{font-size:12.5px;color:var(--muted)}

/* CTA band (reused) */
.cta-band{margin-top:30px;padding:32px 28px;background:linear-gradient(135deg,#1a3a5f,#10274a);color:#fff;border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 260px at 50% 0%, rgba(97,218,251,.22), transparent 60%);pointer-events:none}
.cta-band h3{margin:0 0 8px;font-size:clamp(20px,2.4vw,26px);font-weight:900;letter-spacing:-.01em}
.cta-band p{margin:0 0 18px;color:#cfe0f3;font-size:15px}
.cta-band .cta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cta-band .btn-primary{background:linear-gradient(135deg,#61dafb,#3498db);color:#0b1b33}
.cta-band .btn-ghost{color:#fff}

/* Related / next articles */
.related{margin-top:30px}
.related h2{font-size:20px;color:var(--navy-3);font-weight:900;margin:0 0 16px;display:flex;align-items:center;gap:12px}
.related h2::before{content:"";width:6px;height:22px;border-radius:4px;background:linear-gradient(180deg,#3498db,#1a3a5f)}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.rel-card{display:block;background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px 22px;transition:transform .2s, box-shadow .2s, border-color .2s}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c9e3f8}
.rel-card .kick{font-family:'Outfit',sans-serif;font-size:11px;font-weight:900;letter-spacing:.1em;color:var(--blue)}
.rel-card h4{margin:8px 0 6px;font-size:16px;color:var(--navy-3);font-weight:800;line-height:1.4}
.rel-card p{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.6}

/* ============ COLUMN LIST (index) ============ */
main.list-main{max-width:1180px;margin:-56px auto 0;padding:0 24px 64px;position:relative;z-index:2}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);transition:transform .2s, box-shadow .2s, border-color .2s}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#c9e3f8}
.post-card .thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#10274a,#1a3a5f);position:relative;overflow:hidden}
.post-card .thumb img{width:100%;height:100%;object-fit:cover}
.post-card .thumb .num{position:absolute;top:12px;left:12px;font-family:'Outfit',sans-serif;font-weight:900;font-size:13px;color:#fff;background:rgba(11,27,51,.72);backdrop-filter:blur(4px);padding:6px 12px;border-radius:999px;letter-spacing:.04em}
.post-card .body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.post-card .cat{font-family:'Outfit',sans-serif;font-size:11px;font-weight:900;letter-spacing:.1em;color:var(--blue);margin-bottom:8px}
.post-card h2{font-size:18px;color:var(--navy-3);font-weight:900;line-height:1.42;margin:0 0 10px;letter-spacing:-.01em}
.post-card p{margin:0 0 16px;font-size:14px;color:var(--ink-2);line-height:1.65;flex:1}
.post-card .more{font-size:13.5px;font-weight:800;color:var(--blue)}
.post-card .more::after{content:" →"}

/* Feature/download banner on list */
.dl-band{display:flex;flex-wrap:wrap;align-items:center;gap:18px 26px;margin:0 0 28px;padding:26px 28px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#0b1b33,#1a3a5f);color:#fff;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.dl-band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 260px at 90% 0%, rgba(97,218,251,.22), transparent 60%);pointer-events:none}
.dl-band .dl-ico{flex:none;width:56px;height:56px;border-radius:16px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;font-size:26px}
.dl-band .dl-txt{flex:1 1 320px}
.dl-band .dl-txt b{display:block;font-size:18px;font-weight:900;letter-spacing:-.01em;margin-bottom:4px}
.dl-band .dl-txt span{color:#cfe0f3;font-size:14px}
.dl-band .btn{flex:none}

/* Footer */
footer.site-footer{max-width:1280px;margin:30px auto 30px;padding:0 24px;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}
footer.site-footer a{color:var(--navy-3);font-weight:700}
footer.site-footer nav{display:flex;flex-wrap:wrap;gap:14px}

/* ============ RESPONSIVE ============ */
@media (max-width:980px){
    .primary-nav{display:none}
    .nav-cta{display:none}
    .nav-toggle{display:block}
    .nav-inner{padding:10px 16px}
    .list-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
    .article-card{padding:30px 22px}
    main.col-main,main.list-main{margin-top:-44px;padding:0 14px 44px}
    .rel-grid{grid-template-columns:1fr}
    .list-grid{grid-template-columns:1fr}
    .flow .arrow{transform:rotate(90deg)}
    .col-hero-inner{padding:48px 20px 78px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}