:root{--bg:#07090f;--surface:#0d111c;--surface2:#111827;--surface3:#151d2c;--line:#243044;--line2:#354158;--text:#f8fafc;--muted:#9aa7bc;--muted2:#718096;--yellow:#facc15;--cyan:#22d3ee;--blue:#60a5fa;--green:#34d399;--purple:#a78bfa;--red:#fb7185}
*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",Inter,Arial,sans-serif;background:radial-gradient(900px 520px at 80% 0%,rgba(250,204,21,.075),transparent 60%),linear-gradient(180deg,#07090f,#090d15 58%,#07090f);line-height:1.6;letter-spacing:-.02em}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.u-wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}.utility-header{height:74px;border-bottom:1px solid rgba(255,255,255,.08);background:rgba(7,9,15,.9);backdrop-filter:blur(16px);position:sticky;top:0;z-index:50}.utility-header .u-wrap{height:100%;display:flex;align-items:center;gap:28px}.u-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:850;white-space:nowrap}.u-mark{width:30px;height:30px;border-radius:9px;background:var(--yellow);position:relative;box-shadow:0 0 24px rgba(250,204,21,.22)}.u-mark:before,.u-mark:after{content:"";position:absolute;border:2px solid #17130a;border-radius:4px}.u-mark:before{inset:7px 14px 7px 6px}.u-mark:after{inset:7px 6px 7px 17px}.utility-nav{display:flex;gap:22px;color:#8c99ab;font-size:12px}.utility-nav a:hover,.utility-nav a.active{color:#fff}.u-actions{margin-left:auto;display:flex;gap:10px}.u-search{width:220px;height:40px;border:1px solid #29364a;border-radius:11px;background:#0c121d;color:#748298;display:flex;align-items:center;padding:0 13px;font-size:11px;cursor:pointer}.u-search span{margin-left:auto;border:1px solid #334057;border-radius:5px;padding:1px 6px;font-size:8px}.u-btn{height:40px;border:1px solid #2b384b;border-radius:10px;background:#111827;color:#e5eaf2;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;font-size:11px;font-weight:750}.u-btn.primary{background:var(--yellow);border-color:#ffe36a;color:#17130a}.utility-hero{padding:78px 0 48px}.u-eyebrow{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(250,204,21,.25);background:rgba(250,204,21,.07);border-radius:999px;padding:7px 11px;color:#fde68a;font-size:10px;font-weight:750}.utility-hero h1{font-size:clamp(38px,6vw,66px);line-height:1.1;letter-spacing:-.055em;margin:20px 0 18px;max-width:900px}.utility-hero p{color:#98a5b7;font-size:16px;max-width:760px;margin:0}.hero-stats{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}.hero-stat{min-width:154px;border:1px solid #263247;border-radius:13px;background:#0e1521;padding:13px 15px}.hero-stat small{color:#718096;font-size:9px}.hero-stat b{display:block;margin-top:3px;font-size:17px}.panel{border:1px solid rgba(255,255,255,.09);border-radius:19px;background:linear-gradient(160deg,#111827,#0b111b);box-shadow:0 22px 55px rgba(0,0,0,.22)}.filter-panel{padding:16px;display:flex;align-items:center;gap:10px;position:sticky;top:88px;z-index:30;backdrop-filter:blur(15px);background:rgba(13,19,30,.92)}.roadmap-search{height:42px;min-width:240px;flex:1;border:1px solid #2d394c;border-radius:11px;background:#0b111b;color:#fff;padding:0 13px}.filter-chips{display:flex;gap:7px;flex-wrap:wrap}.filter-chip{height:36px;padding:0 12px;border-radius:999px;border:1px solid #2d394d;background:#101722;color:#8f9bad;font-size:10px;cursor:pointer}.filter-chip.active{border-color:rgba(250,204,21,.36);background:rgba(250,204,21,.1);color:#fde68a}.roadmap-section{padding:30px 0 90px}.roadmap-group{margin-top:48px}.group-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:16px}.group-head h2{font-size:25px;margin:0}.group-head span{color:#6f7d91;font-size:10px}.roadmap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.chapter-card{position:relative;min-height:210px;padding:20px;border:1px solid #253247;border-radius:16px;background:#0f1724;display:flex;flex-direction:column;transition:.2s ease}.chapter-card:hover{transform:translateY(-2px);border-color:#3a4860}.chapter-card.ready{border-color:rgba(250,204,21,.34);background:radial-gradient(300px 170px at 75% 0%,rgba(250,204,21,.08),transparent 65%),#0f1724}.chapter-top{display:flex;align-items:center;justify-content:space-between}.chapter-num{font:750 10px ui-monospace,monospace;color:#65748a}.status{font-size:8px;border:1px solid #303d51;border-radius:999px;padding:4px 7px;color:#7f8ca0}.status.ready{color:#fde68a;border-color:rgba(250,204,21,.32);background:rgba(250,204,21,.08)}.chapter-card h3{font-size:18px;margin:22px 0 4px}.chapter-en{color:#6f7e92;font-size:9px}.chapter-card p{color:#8794a7;font-size:11px;line-height:1.65;margin:12px 0 18px}.chapter-tags{display:flex;gap:5px;flex-wrap:wrap;margin-top:auto}.chapter-tags span{font-size:8px;border:1px solid #293548;border-radius:999px;color:#8795a9;padding:4px 7px}.chapter-foot{display:flex;align-items:center;justify-content:space-between;margin-top:15px;padding-top:13px;border-top:1px solid #202c3d;color:#738197;font-size:9px}.difficulty.beginner{color:#6ee7b7}.difficulty.intermediate{color:#fde68a}.difficulty.advanced{color:#c4b5fd}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}.guide-card{padding:22px}.guide-card b{font-size:16px}.guide-card p{font-size:11px;color:#8491a4;margin:8px 0 0}.utility-section{padding:72px 0}.utility-section h2{font-size:32px;margin:0 0 8px}.utility-section .intro{color:#8390a3;font-size:13px;max-width:700px}.notice{margin-top:25px;padding:18px 20px;border-left:3px solid var(--yellow);background:rgba(250,204,21,.06);border-radius:0 13px 13px 0;color:#b8c1ce;font-size:12px}.utility-footer{border-top:1px solid rgba(255,255,255,.07);padding:35px 0;color:#637187;font-size:10px}.utility-footer .u-wrap{display:flex;justify-content:space-between;gap:20px}.calc-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-bottom:90px}.calc-card{padding:24px}.calc-card h2{font-size:22px;margin:0 0 6px}.calc-card>p{font-size:11px;color:#7f8da1;margin:0 0 22px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field label{display:block;color:#8794a7;font-size:9px;margin:0 0 5px}.field input,.field select{width:100%;height:42px;border:1px solid #2c394c;border-radius:10px;background:#0b111b;color:#fff;padding:0 12px}.calc-result{margin-top:18px;border:1px solid #2b384b;border-radius:13px;background:#0b121d;display:grid;grid-template-columns:repeat(2,1fr)}.result-cell{padding:16px;border-right:1px solid #263246}.result-cell:last-child{border:0}.result-cell small{color:#718096;font-size:9px}.result-cell b{display:block;font-size:20px;margin-top:3px}.formula{margin-top:14px;color:#6f7d91;font:10px ui-monospace,monospace;line-height:1.7}.assumption{font-size:10px;color:#728095;margin-top:12px}.availability-table{width:100%;border-collapse:collapse;margin-top:16px}.availability-table td,.availability-table th{border-bottom:1px solid #263247;padding:10px;text-align:left;font-size:10px}.availability-table th{color:#7b899d}.availability-table td:last-child{color:#fde68a}.empty-roadmap{grid-column:1/-1;padding:50px;text-align:center;color:#7f8ca0}.mobile-menu-toggle{display:none}
@media(max-width:900px){.utility-nav{display:none;position:fixed;left:16px;right:16px;top:74px;background:#0b111b;border:1px solid #2b384b;border-radius:14px;padding:12px;flex-direction:column}.utility-nav.is-open{display:flex}.utility-nav a{padding:10px}.mobile-menu-toggle{display:inline-flex}.u-search{display:none}.roadmap-grid{grid-template-columns:1fr 1fr}.guide-grid{grid-template-columns:1fr}.calc-layout{grid-template-columns:1fr}}
@media(max-width:620px){.u-wrap{width:calc(100% - 28px)}.u-brand{font-size:12px}.u-actions .u-btn.primary{display:none}.utility-hero{padding-top:54px}.filter-panel{align-items:stretch;flex-direction:column;top:82px}.roadmap-search{min-width:0;width:100%}.roadmap-grid{grid-template-columns:1fr}.utility-section{padding:54px 0}.calc-layout{gap:13px}.calc-card{padding:18px}.form-grid{grid-template-columns:1fr}.calc-result{grid-template-columns:1fr}.result-cell{border-right:0;border-bottom:1px solid #263246}.result-cell:last-child{border-bottom:0}.utility-footer .u-wrap{flex-direction:column}}