@font-face{font-family:"Inter Fallback";src:local("Arial");ascent-override:90.2%;descent-override:22.48%;line-gap-override:0%;size-adjust:107.4%}
:root{
  --bg:#f7f8fb;--bg-soft:#fff;--card:#fff;--card-2:#f1f4f8;
  --text:#171a22;--text-soft:#596171;--text-dim:#848b9b;--border:#e4e8f0;
  --accent:#0f766e;--accent-2:#2563eb;--accent-3:#e11d48;--warm:#f59e0b;--ok:#10b981;--bad:#ef4444;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --sans:"Inter","Inter Fallback","Noto Sans KR",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --shadow:0 1px 2px rgba(18,24,38,.04),0 10px 28px rgba(18,24,38,.07);
  --shadow-lg:0 16px 48px rgba(18,24,38,.14);--radius:16px;--maxw:1180px;
}
[data-theme="dark"]{
  --bg:#0d1018;--bg-soft:#121722;--card:#171d2a;--card-2:#202838;
  --text:#f1f5f9;--text-soft:#b6bfcc;--text-dim:#8792a3;--border:#2b3547;
  --accent:#2dd4bf;--accent-2:#60a5fa;--accent-3:#fb7185;--warm:#fbbf24;
  --shadow:0 1px 2px rgba(0,0,0,.35),0 10px 30px rgba(0,0,0,.32);
  --shadow-lg:0 18px 56px rgba(0,0,0,.48);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--text);line-height:1.55;background:linear-gradient(180deg,var(--bg-soft) 0,var(--bg) 360px);-webkit-font-smoothing:antialiased}
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px}
a{color:var(--accent)}
.skip-link{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:10px 16px;border-radius:8px;z-index:100}
.skip-link:focus{left:12px;top:12px}
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:saturate(140%) blur(12px);background:color-mix(in srgb,var(--bg-soft) 84%,transparent);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:1.15rem}
.brand-mark{width:34px;height:34px;border-radius:10px;background:conic-gradient(from 30deg,#0f766e,#2563eb,#8b5cf6,#e11d48,#f59e0b,#0f766e);box-shadow:inset 0 0 0 7px color-mix(in srgb,var(--card) 76%,transparent)}
.header-actions{display:flex;align-items:center;gap:10px}
.lang-select,.theme-toggle{border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:12px;height:40px;font-family:var(--sans);font-weight:750;cursor:pointer}
.lang-select{appearance:none;-webkit-appearance:none;padding:9px 30px 9px 12px;font-size:.88rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23848b9b' stroke-width='3' stroke-linecap='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}
.theme-toggle{min-width:58px;padding:0 12px;font-size:.82rem}
.workspace{padding-block:28px 10px}
.intro-panel{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:end;margin-bottom:18px}
.intro-panel h1{font-size:clamp(2rem,5vw,3.65rem);line-height:1.04;margin:6px 0 12px;letter-spacing:0;font-weight:800;max-width:780px}
.intro-panel p{max-width:680px;color:var(--text-soft);font-size:clamp(1rem,2vw,1.1rem);margin:0}
.grad{background:linear-gradient(105deg,var(--accent),var(--accent-2) 48%,var(--accent-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-block;color:var(--accent);font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.hero-preview{height:118px;border:1px solid var(--border);border-radius:18px;overflow:hidden;display:grid;grid-template-columns:1.25fr 1fr .9fr 1.1fr .8fr;box-shadow:var(--shadow)}
.hero-preview span{background:var(--c)}
.tool-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(330px,.9fr);gap:18px;margin-top:18px}
.lower-grid{align-items:start}
.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.section-head{margin-bottom:14px}
.section-head.row{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
.section-head h2{font-size:1.28rem;margin:4px 0 0;letter-spacing:0}
.generator-row{display:grid;grid-template-columns:110px minmax(150px,1fr) minmax(170px,1fr);gap:12px;align-items:end}
.color-field,.text-field{display:grid;gap:7px;font-size:.78rem;font-weight:800;color:var(--text-soft)}
.color-field input[type=color]{width:100%;height:46px;border:1px solid var(--border);border-radius:12px;background:var(--card-2);padding:4px;cursor:pointer}
.text-field input,.text-field select{width:100%;height:46px;border:1px solid var(--border);border-radius:12px;background:var(--card-2);color:var(--text);font-family:var(--sans);font-weight:750;padding:0 12px}
.text-field input{font-family:var(--mono);text-transform:uppercase}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;border:1px solid var(--border);background:var(--card-2);color:var(--text);padding:0 15px;border-radius:11px;font-weight:800;font-size:.9rem;cursor:pointer;font-family:var(--sans);transition:transform .15s,border-color .15s;text-decoration:none}
.btn:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-color:transparent}
.btn-small{min-height:36px;font-size:.82rem}
.palette{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;margin-top:18px}
.swatch{min-height:132px;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--card-2);cursor:pointer;text-align:left;padding:0;box-shadow:none;font-family:var(--sans)}
.swatch-color{height:82px;background:var(--c)}
.swatch-body{padding:9px 10px;display:grid;gap:2px}
.swatch strong{font-family:var(--mono);font-size:.86rem;color:var(--text)}
.swatch span{font-size:.75rem;color:var(--text-dim)}
.swatch.active{outline:3px solid color-mix(in srgb,var(--accent) 36%,transparent);outline-offset:2px}
.drop-zone{display:grid;place-items:center;text-align:center;min-height:168px;border:1.5px dashed color-mix(in srgb,var(--accent-2) 45%,var(--border));border-radius:15px;background:color-mix(in srgb,var(--accent-2) 6%,var(--card-2));cursor:pointer;padding:22px;transition:border-color .18s,background .18s}
.drop-zone:hover,.drop-zone.drag{border-color:var(--accent-2);background:color-mix(in srgb,var(--accent-2) 10%,var(--card-2))}
.drop-zone input{position:absolute;inline-size:1px;block-size:1px;opacity:0;pointer-events:none}
.drop-title{display:block;font-weight:800;font-size:1.05rem;margin-bottom:5px}
.drop-sub{display:block;color:var(--text-soft);font-size:.88rem;max-width:340px}
.image-preview{display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;align-items:center;margin-top:14px;padding:10px;border:1px solid var(--border);border-radius:13px;background:var(--card-2)}
.image-preview img{width:76px;height:76px;object-fit:cover;border-radius:10px;background:var(--bg)}
.image-preview strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.image-preview span{display:block;color:var(--text-dim);font-size:.82rem;font-family:var(--mono);margin-top:2px}
.hint{margin:12px 0 0;color:var(--text-soft);font-size:.88rem}
.selected-swatch{display:grid;grid-template-columns:76px minmax(0,1fr);gap:14px;align-items:center;padding:12px;border:1px solid var(--border);border-radius:14px;background:var(--card-2);margin-bottom:14px}
.selected-color{width:76px;height:76px;border-radius:12px;background:#0f766e;border:1px solid rgba(0,0,0,.08)}
.selected-swatch strong{font-family:var(--mono);font-size:1.15rem}
.selected-swatch span{display:block;color:var(--text-dim);font-size:.85rem;margin-top:2px}
.value-grid{display:grid;gap:8px}
.value-row{display:grid;grid-template-columns:84px minmax(0,1fr);gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--border);border-radius:11px;background:var(--bg-soft)}
.value-row strong{font-size:.78rem;color:var(--text-soft)}
.value-row code{font-family:var(--mono);font-size:.88rem;color:var(--text);overflow-wrap:anywhere}
.contrast-controls{display:grid;grid-template-columns:1fr 64px 1fr;gap:10px;align-items:end}
.swap-btn{height:46px;border:1px solid var(--border);border-radius:12px;background:var(--card-2);color:var(--text);font-weight:800;cursor:pointer}
.contrast-preview{border:1px solid var(--border);border-radius:14px;padding:18px;margin-top:14px;background:#fff;color:#111827}
.contrast-preview strong{display:block;font-size:1.18rem;margin-bottom:4px}
.contrast-preview span{font-size:.9rem}
.contrast-result{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}
.metric{border:1px solid var(--border);border-radius:12px;padding:10px;background:var(--card-2)}
.metric strong{display:block;font-size:1.1rem}
.metric span{font-size:.76rem;color:var(--text-soft);font-weight:750}
.badge-pass{color:var(--ok)}.badge-fail{color:var(--bad)}
.gradient-preview{height:140px;border-radius:16px;border:1px solid var(--border);margin-bottom:14px;background:linear-gradient(135deg,#0f766e,#f59e0b)}
.code-box{margin:14px 0 0;border:1px solid var(--border);background:var(--card-2);border-radius:13px;padding:14px;min-height:78px;max-height:260px;overflow:auto;color:var(--text);font:600 .84rem/1.55 var(--mono);white-space:pre-wrap}
.code-box.tall{min-height:228px}
.tabs{display:inline-flex;gap:4px;background:var(--card-2);border:1px solid var(--border);border-radius:12px;padding:4px}
.tab{border:0;background:transparent;color:var(--text-soft);font-weight:800;font-family:var(--sans);border-radius:9px;padding:8px 12px;cursor:pointer}
.tab.active{background:var(--card);color:var(--text);box-shadow:var(--shadow)}
.content{max-width:800px;margin-inline:auto;padding:58px 22px 6px}
.content h2{font-size:clamp(1.45rem,4vw,2.05rem);letter-spacing:0;margin:0 0 12px}
.content p{color:var(--text-soft);line-height:1.76;margin:0 0 14px}
.faq{padding-top:34px}
.faq-item{border:1px solid var(--border);border-radius:14px;background:var(--card);margin-bottom:10px;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:800;display:flex;justify-content:space-between;gap:14px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--accent);font-size:1.35rem;line-height:1}
.faq-item[open] summary::after{content:"-"}
.faq-a{padding:0 18px 18px}.faq-a p{margin:0;color:var(--text-soft)}
.site-footer{margin-top:44px;border-top:1px solid var(--border);padding:26px 0}
.footer-nav{display:flex;gap:8px 22px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}
.footer-nav a{color:var(--text-soft);text-decoration:none;font-size:.88rem;font-weight:700}
.footer-nav a:hover{color:var(--accent)}
.site-footer p{text-align:center;color:var(--text-dim);font-size:.85rem;margin:0}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--text);color:var(--bg);padding:11px 20px;border-radius:12px;font-size:.88rem;font-weight:800;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:80}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:940px){.intro-panel,.tool-grid{grid-template-columns:1fr}.hero-preview{height:82px}.palette{grid-template-columns:repeat(3,1fr)}.generator-row{grid-template-columns:1fr 1fr}.contrast-result{grid-template-columns:1fr}.section-head.row{flex-direction:column;align-items:stretch}}
@media(max-width:560px){.workspace{padding-inline:0}.palette{grid-template-columns:repeat(2,1fr)}.generator-row,.contrast-controls{grid-template-columns:1fr}.swap-btn{width:100%}.header-inner{gap:8px}.brand{font-size:1rem}.lang-select{max-width:112px}.actions .btn{flex:1 1 130px}.panel{padding:18px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}