:root{color-scheme:light;--ink:#1d1d1f;--text:var(--ink);--muted:#616168;--quiet:#696970;--canvas:#f5f5f7;--surface:#fff;--line:#d8d8de;--cyan:#0066cc;--blue:#0071e3;--danger:#b42318;--warning:#855000;--success:#167342;--shadow:0 8px 32px rgba(25,32,55,.035)}
*{box-sizing:border-box}html{background:var(--canvas);scroll-behavior:smooth;scroll-padding-top:6rem}body{min-width:320px;margin:0;color:var(--ink);background:var(--canvas);font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Segoe UI",sans-serif;font-size:1rem;line-height:1.65;letter-spacing:-.018em;-webkit-font-smoothing:antialiased}a{color:var(--cyan);text-underline-offset:.22em}a:hover{color:#004c99}a,button,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,.scroll:focus-visible{outline:3px solid var(--blue);outline-offset:4px}button,input,select,textarea{font:inherit}button,.button{touch-action:manipulation}button[hidden],[hidden]{display:none!important}.shell{width:min(1120px,calc(100% - 3rem));margin:0 auto}.skip-link{position:absolute;z-index:100;top:-6rem;left:1rem;padding:.8rem 1.2rem;border-radius:1rem;background:var(--ink);color:#fff}.skip-link:focus{top:1rem;color:#fff}
.site-header{position:sticky;z-index:20;top:0;background:rgba(250,250,252,.9);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.06)}.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:1.8rem}.brand{display:inline-flex;align-items:center;gap:.5rem;color:var(--ink);text-decoration:none;font-weight:750;white-space:nowrap;letter-spacing:-.045em}.brand:hover{color:var(--ink)}.brand-mark{width:28px;height:28px;display:grid;place-items:center}.brand-mark svg{width:100%;height:100%}.brand-name{font-size:1.15rem}.brand-name span{font-weight:450}.primary-nav{display:flex;align-items:center;justify-content:flex-end;gap:1.1rem;flex-wrap:wrap}.primary-nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;color:#45454b;font-size:.78rem;font-weight:500;text-decoration:none;white-space:nowrap}.primary-nav a:hover,.primary-nav a[aria-current]{color:var(--cyan)}.primary-nav a[aria-current]{text-decoration:underline;text-underline-offset:.45em}.primary-nav .nav-cta{min-height:36px;padding:.4rem 1rem;border-radius:999px;background:var(--blue);color:#fff}.primary-nav .nav-cta:hover{background:#0062c4;color:#fff}.menu-toggle{display:none}
main{min-height:calc(100vh - 20rem);padding:4.5rem 0 6rem}h1,h2,h3{margin:0 0 1rem;color:var(--ink);line-height:1.2;letter-spacing:-.045em;word-break:keep-all;overflow-wrap:anywhere}h1{font-size:clamp(2.2rem,4.5vw,3.8rem);font-weight:750}h2{font-size:clamp(1.5rem,3vw,2.25rem)}h3{font-size:1.15rem}p{margin:0 0 1rem;word-break:keep-all;overflow-wrap:anywhere}li{overflow-wrap:anywhere}.muted{color:var(--muted)}.card{padding:clamp(1.4rem,3vw,2.2rem);border:1px solid #e7e7ec;border-radius:24px;background:var(--surface);box-shadow:var(--shadow)}main>.card+.card{margin-top:1.5rem}main>.card{margin-bottom:1.5rem}.card p:last-child{margin-bottom:0}form{display:grid;gap:.85rem;max-width:32rem;margin:1.25rem 0}form.form-inline{display:block;max-width:none}label{color:var(--ink);font-size:.92rem;font-weight:600}input,select,textarea{width:100%;min-height:3.25rem;padding:.8rem 1rem;border:1px solid #85858d;border-radius:12px;background:#fff;color:var(--ink);font-size:1rem}input[type=checkbox],input[type=radio]{width:auto;min-height:auto;margin-right:.45rem;accent-color:var(--blue)}input[type=hidden]{display:none}textarea{min-height:8rem;resize:vertical}fieldset{display:grid;gap:.85rem;min-width:0;margin:1rem 0;padding:1.2rem;border:1px solid var(--line);border-radius:16px}legend{padding:0 .4rem;font-weight:600}input::placeholder,textarea::placeholder{color:var(--quiet)}input[aria-invalid=true]{border-color:var(--danger)}.field-error{margin:-.3rem 0 0;color:var(--danger);font-size:.9rem}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;min-height:48px;padding:.75rem 1.5rem;border:1px solid transparent;border-radius:999px;background:var(--blue);color:#fff;cursor:pointer;font-weight:550;text-decoration:none;line-height:1.4;transition:background-color 160ms ease-out,transform 160ms ease-out}button:hover,.button:hover{background:#0062c4;color:#fff}button:active,.button:active{transform:scale(.98)}button:disabled{opacity:.6;cursor:wait}.button-secondary{border-color:var(--blue);background:transparent;color:var(--cyan)}.button-secondary:hover{background:#eaf3ff;color:#004c99}.msg{margin-bottom:1.1rem;padding:1rem 1.2rem;border:1px solid var(--line);border-radius:14px;background:#fff}.msg.error{border-color:#e6b0aa;background:#fff1ef;color:#9c251b}.msg.success{border-color:#a7d3b8;background:#eff9f2;color:#176239}.msg.warning{border-color:#e5c383;background:#fff8e9;color:#794900}.status{display:inline-block;padding:.2rem .7rem;border:1px solid var(--line);border-radius:999px;font-size:.85rem;font-weight:650}.status-success{border-color:#acd2bc;background:#edf7f1;color:var(--success)}.status-warning{border-color:#e5c383;background:#fff8e9;color:var(--warning)}.status-danger{border-color:#e6b0aa;background:#fff1ef;color:var(--danger)}.status-neutral{color:var(--ink)}.scroll{overflow-x:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}table{width:100%;border-collapse:collapse;color:var(--muted);font-size:.92rem}th,td{padding:1rem .8rem;border-bottom:1px solid var(--line);text-align:left}th{color:var(--ink);font-weight:600}code{overflow-wrap:anywhere}pre{max-width:100%;overflow:auto}summary{cursor:pointer}.guide-nav a,.board-tabs a{display:inline-flex;align-items:center;min-height:44px}.chat-list li.operator{border-color:#a8c7e9}.site-footer{padding:3rem 0 1.5rem;border-top:1px solid var(--line);color:var(--quiet);font-size:.8rem}.footer-top{display:flex;justify-content:space-between;gap:2rem;padding-bottom:2rem}.footer-top .brand{font-size:1.15rem;margin-bottom:.5rem}.footer-top p{margin:0}.footer-top nav{display:flex;flex-wrap:wrap;align-items:start;gap:.5rem 2rem}.footer-top nav a{min-height:44px;display:flex;align-items:center;color:#515157;text-decoration:none}.footer-top nav a:hover{text-decoration:underline}.footer-bottom{display:flex;justify-content:space-between;gap:1rem;padding-top:1.2rem;border-top:1px solid var(--line)}
@media(max-width:1050px){.header-inner{gap:1rem}.primary-nav{gap:.65rem}.primary-nav a{font-size:.74rem}}
@media(max-width:900px){.shell{width:calc(100% - 2.5rem)}.header-inner{min-height:64px;flex-wrap:wrap;gap:0}.menu-toggle:not([hidden]){display:inline-flex;gap:.6rem;min-height:44px;padding:.4rem .6rem;border:0;border-radius:10px;color:var(--ink);background:transparent;font-size:.82rem}.menu-lines{position:relative;width:18px;height:12px;border-top:1.5px solid;border-bottom:1.5px solid;transition:transform 180ms ease-out}.menu-toggle[aria-expanded=true] .menu-lines{transform:rotate(-45deg);height:1.5px;border-bottom:0}.menu-toggle[aria-expanded=true] .menu-lines:after{content:"";position:absolute;left:0;top:-1.5px;width:18px;border-top:1.5px solid;transform:rotate(90deg)}.primary-nav{width:100%;justify-content:flex-start;gap:.4rem 1.1rem;padding:.5rem 0 1.1rem}.primary-nav a{font-size:.85rem}.js-nav .primary-nav{display:none}.js-nav .primary-nav.is-open{max-height:calc(100dvh - 64px);overflow-y:auto;display:grid;grid-template-columns:1fr 1fr;gap:.25rem 1rem}.js-nav .primary-nav a{justify-content:flex-start;padding:.6rem .4rem;min-height:48px}.js-nav .primary-nav .nav-cta{justify-content:center;padding:.6rem 1rem}.footer-top{flex-direction:column}main{padding:3rem 0 4rem}}
@media(max-width:480px){.shell{width:calc(100% - 2rem)}main{padding-top:2.5rem}.footer-top nav{display:grid;grid-template-columns:1fr 1fr;gap:.2rem 1rem}.footer-bottom{flex-direction:column;gap:.4rem}.card{border-radius:20px}.button,button{padding:.75rem 1.25rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}button:active,.button:active{transform:none}}
@media(prefers-reduced-transparency:reduce){.site-header{background:#fafafc;backdrop-filter:none;-webkit-backdrop-filter:none}}
@media(prefers-contrast:more){:root{--muted:#393940;--quiet:#393940;--line:#777}.site-header{background:#fff;backdrop-filter:none}.card{border-color:#777}}