:root{--primary: #0F172A;--primary-light: #1E293B;--secondary: #F59E0B;--secondary-hover: #D97706;--bg-page: #F8FAFC;--bg-card: #FFFFFF;--text-main: #1E293B;--text-sub: #475569;--text-muted: #94A3B8;--text-inverse: #FFFFFF;--border-color: #E2E8F0;--border-focus: #3B82F6;--success: #10B981;--error: #EF4444;--warning: #F59E0B;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-6: 1.5rem;--space-8: 2rem;--space-12: 3rem;--font-base: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--container-width: 1200px;--navbar-height: 64px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-base);background-color:var(--bg-page);color:var(--text-main);line-height:1.6;-webkit-font-smoothing:antialiased}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}button{cursor:pointer;background:none;border:none}a{color:inherit;text-decoration:none}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:var(--primary)}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:0 var(--space-4)}.section{padding:var(--space-8) 0}.card{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);padding:var(--space-6);transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}h1{font-size:var(--text-3xl);margin-bottom:var(--space-4)}h2{font-size:var(--text-2xl);margin-bottom:var(--space-3)}h3{font-size:var(--text-xl);margin-bottom:var(--space-2)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:600;transition:all .2s}.btn-primary{background-color:var(--primary);color:var(--text-inverse)}.btn-primary:hover{background-color:var(--primary-light)}.btn-secondary{background-color:var(--secondary);color:#fff}.btn-secondary:hover{background-color:var(--secondary-hover)}.btn-full{width:100%}.input-group{margin-bottom:var(--space-4)}.label{display:block;font-weight:600;margin-bottom:var(--space-2);color:var(--primary)}.input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius-md);transition:border-color .2s}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #0f172a1a}.ad-slot{background:#f0f0f0;min-height:100px;display:flex;align-items:center;justify-content:center;color:#888;margin:var(--space-8) 0;border-radius:var(--radius-md)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.section{animation:fadeIn .6s ease-out}.hero{animation:slideUp .8s ease-out}.card{animation:slideUp .6s ease-out;animation-fill-mode:both}.tools-grid .card:nth-child(1){animation-delay:.1s}.tools-grid .card:nth-child(2){animation-delay:.2s}.tools-grid .card:nth-child(3){animation-delay:.3s}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--border-focus);box-shadow:0 0 0 3px #3b82f61a;transition:all .2s ease}.btn-primary{transition:background-color .2s,transform .1s}.btn-primary:active{transform:scale(.98)}