@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',sans-serif;background:#0f0f13;color:#e4e4e7;line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
.hidden{display:none!important}
.container{max-width:1100px;margin:0 auto;padding:0 1.5rem;width:100%}

.site-header{background:#1a1a2e;border-bottom:1px solid rgba(255,255,255,.06);padding:.875rem 0;position:sticky;top:0;z-index:100;backdrop-filter:blur(12px)}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:#e4e4e7;font-weight:700;font-size:1.15rem}
.logo-icon{background:linear-gradient(135deg,#fb923c,#f97316,#ea580c);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-family:'JetBrains Mono',monospace;font-size:1.3rem;font-weight:800}
nav{display:flex;gap:1.5rem}
nav a{color:#a1a1aa;text-decoration:none;font-size:.875rem;font-weight:500;transition:color .2s}
nav a:hover{color:#fb923c}

.hero{text-align:center;padding:3rem 0 1.5rem}
.hero h1{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#fb923c,#f97316,#ea580c);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.75rem}
.hero p{color:#a1a1aa;font-size:1.1rem;max-width:600px;margin:0 auto}

.ad-slot{background:rgba(255,255,255,.02);border:1px dashed rgba(255,255,255,.06);border-radius:.75rem;min-height:90px;display:flex;align-items:center;justify-content:center;color:#52525b;font-size:.75rem;margin:1.5rem auto;max-width:728px}

.card{background:#1a1a2e;border:1px solid rgba(255,255,255,.06);border-radius:1rem;padding:1.5rem}

.regex-input-row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap;margin-bottom:1rem}
.regex-delim{font-family:'JetBrains Mono',monospace;font-size:1.4rem;color:#fb923c;font-weight:700}
.regex-field{flex:1;min-width:200px;background:#0f0f13;border:1px solid rgba(255,255,255,.1);border-radius:.75rem;padding:.75rem 1rem;color:#fb923c;font-family:'JetBrains Mono',monospace;font-size:.95rem;outline:none;transition:border-color .2s}
.regex-field:focus{border-color:#fb923c}
.regex-field::placeholder{color:#52525b}

.flags-row{display:flex;gap:1rem;align-items:center;margin-bottom:1rem;flex-wrap:wrap}
.flags-row label{display:flex;align-items:center;gap:.35rem;font-family:'JetBrains Mono',monospace;font-size:.85rem;color:#a1a1aa;cursor:pointer;user-select:none}
.flags-row input[type="checkbox"]{accent-color:#fb923c;width:16px;height:16px;cursor:pointer}

.test-area{width:100%;background:#0f0f13;border:1px solid rgba(255,255,255,.1);border-radius:.75rem;padding:1rem;color:#e4e4e7;font-family:'JetBrains Mono',monospace;font-size:.9rem;resize:vertical;min-height:120px;outline:none;transition:border-color .2s}
.test-area:focus{border-color:#f97316}
.test-area::placeholder{color:#52525b}

.replace-row{display:flex;gap:.75rem;align-items:center;margin-top:1rem}
.replace-row label{font-size:.85rem;color:#a1a1aa;font-weight:600;white-space:nowrap}
.replace-field{flex:1;background:#0f0f13;border:1px solid rgba(255,255,255,.1);border-radius:.75rem;padding:.65rem 1rem;color:#e4e4e7;font-family:'JetBrains Mono',monospace;font-size:.9rem;outline:none;transition:border-color .2s}
.replace-field:focus{border-color:#f97316}

.section-label{font-size:.8rem;font-weight:600;color:#a1a1aa;text-transform:uppercase;letter-spacing:.05em;margin:1.25rem 0 .5rem}

.match-count{display:inline-block;background:rgba(249,115,22,.12);color:#fb923c;padding:.25rem .75rem;border-radius:2rem;font-size:.8rem;font-weight:600;font-family:'JetBrains Mono',monospace}

.highlighted-text{background:#0f0f13;border:1px solid rgba(255,255,255,.1);border-radius:.75rem;padding:1rem;font-family:'JetBrains Mono',monospace;font-size:.9rem;line-height:1.8;white-space:pre-wrap;word-break:break-word;min-height:60px;color:#e4e4e7}

.match-highlight{background:rgba(249,115,22,.25);border:1px solid rgba(249,115,22,.4);border-radius:3px;padding:0 2px}
.match-highlight-1{background:rgba(56,189,248,.25);border-color:rgba(56,189,248,.4)}
.match-highlight-2{background:rgba(163,230,53,.25);border-color:rgba(163,230,53,.4)}
.match-highlight-3{background:rgba(232,121,249,.25);border-color:rgba(232,121,249,.4)}
.match-highlight-4{background:rgba(251,191,36,.25);border-color:rgba(251,191,36,.4)}

.match-details{margin-top:1rem}
.match-item{background:#0f0f13;border:1px solid rgba(255,255,255,.06);border-radius:.6rem;padding:.75rem 1rem;margin-bottom:.5rem;font-family:'JetBrains Mono',monospace;font-size:.82rem;display:flex;gap:1rem;flex-wrap:wrap;align-items:baseline}
.match-item .match-idx{color:#fb923c;font-weight:700;min-width:2.5rem}
.match-item .match-text{color:#e4e4e7;word-break:break-all}
.match-item .match-pos{color:#71717a;font-size:.75rem}
.match-groups{color:#a1a1aa;font-size:.78rem;margin-top:.25rem;width:100%;padding-left:3.5rem}

.replace-result{background:#0f0f13;border:1px solid rgba(255,255,255,.1);border-radius:.75rem;padding:1rem;font-family:'JetBrains Mono',monospace;font-size:.9rem;white-space:pre-wrap;word-break:break-word;min-height:40px;color:#a3e635}

.error-msg{color:#f87171;background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.2);border-radius:.75rem;padding:.75rem 1rem;font-size:.85rem;font-family:'JetBrains Mono',monospace;margin-top:.75rem}

.patterns-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.75rem;margin-top:.75rem}
.pattern-btn{background:#0f0f13;border:1px solid rgba(255,255,255,.08);border-radius:.6rem;padding:.65rem .85rem;cursor:pointer;transition:all .2s;text-align:left}
.pattern-btn:hover{border-color:#fb923c;background:rgba(249,115,22,.06)}
.pattern-btn .pattern-name{font-size:.82rem;font-weight:600;color:#e4e4e7;margin-bottom:.2rem}
.pattern-btn .pattern-regex{font-family:'JetBrains Mono',monospace;font-size:.72rem;color:#fb923c;word-break:break-all}

.content-section{margin-top:2.5rem}
.content-section h2{font-size:1.4rem;font-weight:700;margin-bottom:1rem;color:#e4e4e7}
.content-section h3{font-size:1rem;font-weight:600;margin:1rem 0 .5rem;color:#d4d4d8}
.content-section p,.content-section li{color:#a1a1aa;font-size:.9rem;margin-bottom:.5rem}
.content-section ul{padding-left:1.25rem}
.content-section a{color:#fb923c}

.faq-item{border-bottom:1px solid rgba(255,255,255,.06);padding:1rem 0}
.faq-item:last-child{border-bottom:none}
.faq-q{font-weight:600;color:#e4e4e7;margin-bottom:.4rem;font-size:.95rem}
.faq-a{color:#a1a1aa;font-size:.88rem}

.site-footer{margin-top:auto;background:#1a1a2e;border-top:1px solid rgba(255,255,255,.06);padding:1.5rem 0;text-align:center}
.site-footer .container{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.site-footer p{color:#52525b;font-size:.8rem}
.site-footer nav{display:flex;gap:1.25rem}
.site-footer nav a{color:#71717a;text-decoration:none;font-size:.8rem;transition:color .2s}
.site-footer nav a:hover{color:#fb923c}

@media(max-width:768px){
.hero h1{font-size:1.75rem}
nav{display:none}
.regex-input-row{flex-direction:column}
.regex-delim{display:none}
.patterns-grid{grid-template-columns:1fr}
.replace-row{flex-direction:column}
.site-footer .container{justify-content:center;text-align:center}
}