@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

*{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue-50:#F4F8FF;--blue-100:#E8F3FF;--blue-200:#C9E0FF;
  --blue-500:#3182F6;--blue-600:#1B64DA;--blue-700:#1957C2;
  --gray-50:#F9FAFB;--gray-100:#F2F4F6;--gray-200:#E5E8EB;
  --gray-300:#D1D6DB;--gray-400:#B0B8C1;--gray-500:#8B95A1;
  --gray-600:#6B7684;--gray-700:#4E5968;--gray-800:#333D4B;--gray-900:#191F28;
  --green-50:#E6F9F2;--green-500:#00C896;
  --orange-50:#FFF4E5;--orange-500:#FF9500;
  --red-50:#FEECEC;--red-500:#F04452;
  --purple-50:#F3EFFF;--purple-500:#8B5CF6;
  --shadow-sm:0 1px 3px rgba(15,23,42,.04);
  --shadow-md:0 4px 16px rgba(15,23,42,.06);
  --shadow-lg:0 8px 32px rgba(15,23,42,.08);
  --radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px
}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:'Pretendard',-apple-system,BlinkMacSystemFont,system-ui,sans-serif;background:var(--gray-50);color:var(--gray-900);line-height:1.5;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;font-feature-settings:'tnum'}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:none;cursor:pointer;background:none;color:inherit}
input,textarea,select{font-family:inherit}
img{max-width:100%;display:block}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.container-sm{max-width:800px;margin:0 auto;padding:0 20px}

/* GNB */
.gnb{background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--gray-200);position:sticky;top:0;z-index:100}
.gnb-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.gnb-logo{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:700;color:var(--gray-900)}
.gnb-logo svg{height:28px;width:auto}
.gnb-menu{display:flex;gap:4px;align-items:center}
.gnb-menu a{padding:8px 14px;border-radius:var(--radius-sm);font-size:15px;font-weight:500;color:var(--gray-700);transition:all .15s}
.gnb-menu a:hover{background:var(--gray-100);color:var(--gray-900)}
.gnb-menu a.active{color:var(--blue-500)}
.gnb-burger{display:none;width:40px;height:40px;border-radius:var(--radius-sm);align-items:center;justify-content:center}
.gnb-burger:hover{background:var(--gray-100)}
@media(max-width:768px){.gnb-menu{display:none;position:absolute;top:64px;left:0;right:0;background:white;flex-direction:column;padding:12px;gap:0;border-bottom:1px solid var(--gray-200);box-shadow:var(--shadow-md)}.gnb-menu.open{display:flex}.gnb-menu a{padding:14px 16px;width:100%}.gnb-burger{display:flex}}

/* Hero */
.hero{padding:80px 0 60px;text-align:center;background:linear-gradient(180deg,var(--blue-50) 0%,var(--gray-50) 100%)}
.hero-tag{display:inline-block;padding:6px 14px;background:var(--blue-100);color:var(--blue-600);border-radius:999px;font-size:13px;font-weight:600;margin-bottom:20px}
.hero h1{font-size:48px;font-weight:800;line-height:1.2;letter-spacing:-.03em;margin-bottom:20px}
.hero h1 .accent{color:var(--blue-500)}
.hero p{font-size:18px;color:var(--gray-700);max-width:600px;margin:0 auto 32px}
.hero-cta{display:inline-flex;align-items:center;gap:8px;padding:16px 28px;background:var(--blue-500);color:white;border-radius:var(--radius-md);font-size:16px;font-weight:700;box-shadow:0 4px 14px rgba(49,130,246,.25);transition:all .15s}
.hero-cta:hover{background:var(--blue-600);transform:translateY(-1px)}
@media(max-width:640px){.hero{padding:56px 0 40px}.hero h1{font-size:32px}.hero p{font-size:16px}}

/* Page Head */
.page-head{padding:56px 0 40px;text-align:center}
.page-head .badge{display:inline-block;padding:6px 12px;background:var(--blue-100);color:var(--blue-600);border-radius:999px;font-size:12px;font-weight:600;margin-bottom:16px}
.page-head h1{font-size:36px;font-weight:800;letter-spacing:-.03em;margin-bottom:12px}
.page-head p{font-size:16px;color:var(--gray-700);max-width:640px;margin:0 auto}
@media(max-width:640px){.page-head h1{font-size:26px}.page-head{padding:40px 0 28px}}

/* Card */
.card{background:white;border-radius:var(--radius-xl);padding:28px;box-shadow:var(--shadow-sm);border:1px solid var(--gray-200)}
.card-lg{padding:36px}
@media(max-width:640px){.card{padding:20px;border-radius:var(--radius-lg)}.card-lg{padding:24px}}
.card-title{font-size:18px;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:8px}

/* Form */
.form-group{margin-bottom:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:600px){.form-row{grid-template-columns:1fr}}
.form-label{display:block;font-size:14px;font-weight:600;color:var(--gray-800);margin-bottom:8px}
.form-help{font-size:13px;color:var(--gray-500);margin-top:6px}
.input,.textarea,.select{width:100%;padding:14px 16px;background:var(--gray-100);border:2px solid transparent;border-radius:var(--radius-md);font-size:15px;transition:all .15s;outline:none}
.input:focus,.textarea:focus,.select:focus{background:white;border-color:var(--blue-500)}
.textarea{resize:vertical;min-height:120px;line-height:1.6}
.textarea-mono{font-family:'JetBrains Mono','Consolas','Courier New',monospace;font-size:13px}
.input-mono{font-family:'JetBrains Mono','Consolas','Courier New',monospace}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 22px;border-radius:var(--radius-md);font-size:15px;font-weight:700;transition:all .15s}
.btn-primary{background:var(--blue-500);color:white;box-shadow:0 2px 8px rgba(49,130,246,.2)}
.btn-primary:hover{background:var(--blue-600);transform:translateY(-1px)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-secondary{background:var(--gray-100);color:var(--gray-800)}
.btn-secondary:hover{background:var(--gray-200)}
.btn-block{width:100%;padding:16px;font-size:16px}
.btn-sm{padding:8px 14px;font-size:13px}

/* Result */
.result-section{margin-top:32px}
.result-empty{text-align:center;padding:60px 20px;color:var(--gray-500);background:var(--gray-50);border-radius:var(--radius-lg);border:1px dashed var(--gray-300)}

/* Code Block */
.code-block{background:#0F172A;color:#E5E8EB;padding:20px;border-radius:var(--radius-md);font-family:'JetBrains Mono','Consolas',monospace;font-size:13px;line-height:1.7;overflow-x:auto;white-space:pre;position:relative}
.copy-btn{position:absolute;top:12px;right:12px;background:rgba(255,255,255,.1);color:white;padding:6px 12px;border-radius:6px;font-size:12px;cursor:pointer;transition:background .15s}
.copy-btn:hover{background:rgba(255,255,255,.2)}
.copy-btn.copied{background:var(--green-500)}

/* Stat */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:24px}
.stat{background:var(--gray-50);padding:20px;border-radius:var(--radius-md)}
.stat-label{font-size:13px;color:var(--gray-600);margin-bottom:6px}
.stat-value{font-size:24px;font-weight:800;letter-spacing:-.02em}
.stat-value.blue{color:var(--blue-500)}
.stat-value.green{color:var(--green-500)}
.stat-value.orange{color:var(--orange-500)}
.stat-value.red{color:var(--red-500)}
.stat-value.purple{color:var(--purple-500)}

/* Alert */
.alert{padding:14px 18px;border-radius:var(--radius-md);font-size:14px;line-height:1.5;display:flex;gap:10px;align-items:flex-start}
.alert-error{background:var(--red-50);color:var(--red-500)}
.alert-info{background:var(--blue-50);color:var(--blue-600)}
.alert-warn{background:var(--orange-50);color:var(--orange-500)}
.alert-success{background:var(--green-50);color:var(--green-500)}

/* Badge */
.badge{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600}
.badge.green{background:var(--green-50);color:var(--green-500)}
.badge.orange{background:var(--orange-50);color:var(--orange-500)}
.badge.red{background:var(--red-50);color:var(--red-500)}
.badge.blue{background:var(--blue-100);color:var(--blue-600)}
.badge.gray{background:var(--gray-100);color:var(--gray-600)}
.badge.purple{background:var(--purple-50);color:var(--purple-500)}

/* Index Grid */
.feature-section{padding:80px 0}
.section-title{font-size:32px;font-weight:800;letter-spacing:-.03em;text-align:center;margin-bottom:12px}
.section-sub{font-size:16px;color:var(--gray-700);text-align:center;margin-bottom:48px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.feature-card{background:white;padding:28px;border-radius:var(--radius-xl);border:1px solid var(--gray-200);transition:all .2s;display:flex;flex-direction:column;position:relative;overflow:hidden}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--blue-200)}
.feature-card .icon-box{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin-bottom:16px;background:var(--blue-100);color:var(--blue-500)}
.feature-card.c-green .icon-box{background:var(--green-50);color:var(--green-500)}
.feature-card.c-orange .icon-box{background:var(--orange-50);color:var(--orange-500)}
.feature-card.c-red .icon-box{background:var(--red-50);color:var(--red-500)}
.feature-card.c-purple .icon-box{background:var(--purple-50);color:var(--purple-500)}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:8px;letter-spacing:-.02em}
.feature-card p{font-size:14px;color:var(--gray-600);line-height:1.55;flex:1;margin-bottom:16px}
.feature-card .arrow{font-size:14px;font-weight:600;color:var(--blue-500);display:flex;align-items:center;gap:4px}

/* Why Section */
.why-section{padding:80px 0;background:white;border-top:1px solid var(--gray-200);border-bottom:1px solid var(--gray-200)}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:32px}
.why-item{text-align:center}
.why-item .icon-circle{width:64px;height:64px;border-radius:50%;background:var(--blue-100);color:var(--blue-500);display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.why-item h4{font-size:18px;font-weight:700;margin-bottom:8px}
.why-item p{font-size:14px;color:var(--gray-600);line-height:1.6}

/* FAQ */
.faq-section{padding:80px 0}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:white;border-radius:var(--radius-lg);border:1px solid var(--gray-200);overflow:hidden}
.faq-q{padding:20px 24px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:600;font-size:15px}
.faq-q .chev{transition:transform .2s;color:var(--gray-400)}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .25s,padding .25s;color:var(--gray-700);font-size:14px;line-height:1.7}
.faq-item.open .faq-a{padding:0 24px 20px;max-height:600px}

/* Guide */
.guide-section{margin-top:48px}
.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:24px}
.guide-item{background:white;padding:24px;border-radius:var(--radius-lg);border:1px solid var(--gray-200)}
.guide-item .step-num{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--blue-500);color:white;font-size:13px;font-weight:700;margin-bottom:12px}
.guide-item h4{font-size:15px;font-weight:700;margin-bottom:6px}
.guide-item p{font-size:13px;color:var(--gray-600);line-height:1.6}

/* Related Tools */
.related-tools{margin-top:60px;padding:32px;background:var(--blue-50);border-radius:var(--radius-xl)}
.related-tools h3{font-size:18px;font-weight:700;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.related-item{display:flex;align-items:center;gap:12px;padding:14px 16px;background:white;border-radius:var(--radius-md);transition:all .15s;font-size:14px;font-weight:600}
.related-item:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.related-item .ri-icon{width:32px;height:32px;border-radius:var(--radius-sm);background:var(--blue-100);color:var(--blue-500);display:flex;align-items:center;justify-content:center;flex-shrink:0}

/* Footer */
.footer{background:var(--gray-900);color:var(--gray-400);padding:48px 0 32px;margin-top:80px}
.footer-top{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between;padding-bottom:32px;border-bottom:1px solid var(--gray-800)}
.footer-brand{max-width:320px}
.footer-brand .logo{font-size:18px;font-weight:700;color:white;display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-brand p{font-size:14px;line-height:1.6}
.footer-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:32px}
.footer-col h5{font-size:13px;font-weight:700;color:white;margin-bottom:12px;text-transform:uppercase;letter-spacing:.05em}
.footer-col a{display:block;font-size:14px;color:var(--gray-400);padding:4px 0;transition:color .15s}
.footer-col a:hover{color:white}
.footer-bottom{padding-top:24px;font-size:13px;color:var(--gray-500);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}

/* Color Tools */
.color-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px}
.color-chip{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--gray-200);cursor:pointer;transition:transform .15s}
.color-chip:hover{transform:scale(1.04)}
.color-chip .swatch{height:80px}
.color-chip .meta{padding:10px;background:white;font-size:12px;font-family:'JetBrains Mono',monospace}
.color-chip .meta .name{font-weight:700;margin-bottom:2px}
.color-chip .meta .hex{color:var(--gray-500)}
.color-picker-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:720px){.color-picker-wrap{grid-template-columns:1fr}}
.color-preview{aspect-ratio:1;border-radius:var(--radius-lg);border:1px solid var(--gray-200);background:#3182F6}
.color-info{display:flex;flex-direction:column;gap:12px}
.color-info-row{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--gray-50);border-radius:var(--radius-md);font-family:'JetBrains Mono',monospace;font-size:13px}
.color-info-row .label{color:var(--gray-600);font-weight:600}
.color-info-row .value{font-weight:700}

/* Toggle */
.toggle-group{display:inline-flex;background:var(--gray-100);border-radius:var(--radius-md);padding:4px;gap:2px;flex-wrap:wrap}
.toggle-group button{padding:8px 16px;border-radius:8px;font-size:14px;font-weight:600;color:var(--gray-600);transition:all .15s}
.toggle-group button.on{background:white;color:var(--gray-900);box-shadow:var(--shadow-sm)}

/* Diff */
.diff-result{font-family:'JetBrains Mono',monospace;font-size:13px;background:white;border:1px solid var(--gray-200);border-radius:var(--radius-md);overflow-x:auto}
.diff-line{padding:4px 16px;white-space:pre;display:flex}
.diff-line.add{background:#E6FBF1;color:#0E5E40}
.diff-line.del{background:#FEEBEE;color:#8B1F26}
.diff-line.eq{color:var(--gray-700)}
.diff-line .marker{display:inline-block;width:24px;color:var(--gray-400);flex-shrink:0}

/* Preview */
.preview-frame{width:100%;min-height:400px;border:1px solid var(--gray-200);border-radius:var(--radius-md);background:white}

/* Font card */
.font-card{padding:24px;background:white;border-radius:var(--radius-lg);border:1px solid var(--gray-200);margin-bottom:16px}
.font-card .font-name{font-size:14px;color:var(--gray-600);margin-bottom:12px;font-weight:600}
.font-card .font-sample{font-size:28px;line-height:1.4}

/* Regex */
.regex-match-list{background:var(--gray-50);padding:16px;border-radius:var(--radius-md);max-height:300px;overflow-y:auto;font-family:'JetBrains Mono',monospace;font-size:13px}
.regex-match{padding:8px 12px;background:white;margin-bottom:6px;border-radius:6px;border-left:3px solid var(--blue-500)}
.regex-highlight{background:#FEF3C7;color:#92400E;padding:1px 3px;border-radius:3px;font-weight:600}

/* Image preview */
.img-preview{max-width:100%;max-height:400px;border-radius:var(--radius-md);border:1px solid var(--gray-200);background:repeating-conic-gradient(#F0F0F0 0% 25%,white 0% 50%) 50%/20px 20px;margin:12px auto;display:block}
.upload-zone{border:2px dashed var(--gray-300);border-radius:var(--radius-lg);padding:60px 20px;text-align:center;background:var(--gray-50);transition:all .15s;cursor:pointer}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--blue-500);background:var(--blue-50)}
.upload-zone svg{margin:0 auto 16px;color:var(--gray-400)}
.upload-zone p{color:var(--gray-600);font-size:14px}
.upload-zone .small{font-size:12px;color:var(--gray-500);margin-top:4px}

/* Speed score gauge */
.gauge-wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;margin-bottom:24px}
.gauge{text-align:center;padding:20px;background:white;border-radius:var(--radius-lg);border:1px solid var(--gray-200)}
.gauge-circle{width:100px;height:100px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:32px;font-weight:800;color:white}
.gauge-circle.good{background:linear-gradient(135deg,#00C896,#00A87B)}
.gauge-circle.avg{background:linear-gradient(135deg,#FF9500,#FF6B00)}
.gauge-circle.bad{background:linear-gradient(135deg,#F04452,#D32F3F)}
.gauge-label{font-size:14px;color:var(--gray-700);font-weight:600}

/* Prose - 정적 페이지 */
.prose{max-width:720px;margin:0 auto;padding:40px 20px 60px}
.prose h1{font-size:32px;font-weight:800;margin-bottom:16px;letter-spacing:-.02em}
.prose h2{font-size:22px;font-weight:700;margin:36px 0 12px;letter-spacing:-.02em}
.prose h3{font-size:17px;font-weight:700;margin:24px 0 8px}
.prose p{font-size:15px;line-height:1.75;color:var(--gray-700);margin-bottom:12px}
.prose ul,.prose ol{padding-left:24px;margin-bottom:12px}
.prose li{font-size:15px;line-height:1.75;color:var(--gray-700);margin-bottom:4px}
.prose strong{color:var(--gray-900);font-weight:700}
.prose .meta{color:var(--gray-500);font-size:14px;margin-bottom:32px}
.prose a{color:var(--blue-500);font-weight:600}

/* Utils */
.text-center{text-align:center}
.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.mt-48{margin-top:48px}
.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}
.flex{display:flex}.gap-12{gap:12px}.gap-16{gap:16px}