:root{
  --bg:#080b14;--panel:#101522;--panel2:#151c2c;--text:#f4f7fb;--muted:#98a5ba;
  --line:#243049;--accent:#6d7cff;--accent2:#35d5ff;--good:#39d98a;
  --max:1160px;--radius:18px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}
a{color:inherit;text-decoration:none}.container{width:min(var(--max),calc(100% - 32px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(8,11,20,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav{height:68px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}.brand-mark{display:grid;place-items:center;width:31px;height:31px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 8px 28px rgba(77,112,255,.3)}
.nav-links{display:flex;gap:28px;color:var(--muted);font-size:14px}.nav-links a:hover{color:#fff}.mobile-menu{display:none;background:none;border:0;color:#fff;font-size:24px}
.hero{padding:92px 0 66px;background:radial-gradient(circle at 50% 15%,rgba(91,105,255,.16),transparent 38%),linear-gradient(180deg,#0b1020 0%,var(--bg) 100%)}
.hero-inner{text-align:center}.eyebrow{font-size:11px;letter-spacing:.16em;font-weight:800;color:#8493ff;margin-bottom:12px}.hero h1{font-size:clamp(44px,7vw,78px);line-height:1.02;letter-spacing:-.055em;margin:0}.hero h1 span{background:linear-gradient(90deg,#a5afff,#67ddff);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{max-width:650px;margin:22px auto 30px;color:var(--muted);font-size:18px}
.search-wrap{width:min(720px,100%);margin:auto;display:flex;align-items:center;background:#12192a;border:1px solid #2a3856;border-radius:15px;padding:5px 8px 5px 17px;box-shadow:0 20px 70px rgba(0,0,0,.28)}.search-icon{font-size:26px;color:#8d9ab0}.search-wrap input{flex:1;background:none;border:0;outline:0;color:#fff;padding:14px;font-size:16px}.search-wrap kbd{color:#8794aa;border:1px solid #34415c;border-radius:7px;padding:3px 7px;font-size:12px}.hero-chips{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:16px}.hero-chips button,.category-card{cursor:pointer}.hero-chips button{background:#101727;color:#b7c2d5;border:1px solid #26334d;border-radius:999px;padding:7px 12px}.hero-chips button:hover{border-color:#6576ff;color:#fff}
.ad-slot{width:min(var(--max),calc(100% - 32px));height:90px;margin:24px auto;display:grid;place-items:center;border:1px dashed #27334b;border-radius:14px;color:#66748b;font-size:10px;letter-spacing:.14em}
.section{padding:70px 0}.section.alt{background:#0c111d;border-top:1px solid #121b2b;border-bottom:1px solid #121b2b}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:25px}.section h2{font-size:34px;letter-spacing:-.03em;margin:0}.muted{color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.tool-card{background:linear-gradient(180deg,#111827,#0f1522);border:1px solid #202c43;border-radius:var(--radius);padding:21px;transition:.2s;cursor:pointer}.tool-card:hover{transform:translateY(-2px);border-color:#5367ff;box-shadow:0 15px 45px rgba(0,0,0,.2)}.tool-icon{font-size:22px;margin-bottom:16px}.tool-card h3{margin:0 0 6px;font-size:17px}.tool-card p{margin:0;color:var(--muted);font-size:13px}.tag{display:inline-block;margin-top:15px;color:#8d9cff;background:#161e34;border-radius:999px;padding:4px 8px;font-size:10px;text-transform:uppercase;letter-spacing:.08em}
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:25px}.category-card{background:#111827;border:1px solid #202c43;border-radius:15px;padding:20px}.category-card strong{display:block}.category-card span{font-size:12px;color:var(--muted)}
.narrow{max-width:900px}.lead{color:var(--muted);font-size:17px;max-width:760px}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}.info-card{border:1px solid var(--line);border-radius:16px;padding:20px;background:#0d131f}.info-card strong,.info-card span{display:block}.info-card span{color:var(--muted);font-size:13px;margin-top:7px}
.footer{border-top:1px solid #171f31;padding:45px 0 20px;color:var(--muted)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footer-grid strong{display:block;color:#fff;margin-bottom:12px}.footer-grid a{display:block;margin:8px 0;font-size:13px}.footer p{font-size:13px}.copyright{margin-top:35px;padding-top:18px;border-top:1px solid #171f31;font-size:12px}
.hidden{display:none!important}.empty{text-align:center;padding:70px 0}.empty-icon{font-size:45px}
.modal{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:18px}.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.72);backdrop-filter:blur(5px)}.modal-card{position:relative;width:min(680px,100%);max-height:90vh;overflow:auto;background:#0f1624;border:1px solid #2a3854;border-radius:22px;padding:30px;box-shadow:0 30px 100px rgba(0,0,0,.5)}.close{position:absolute;right:18px;top:14px;background:#182238;color:#fff;border:0;border-radius:10px;width:34px;height:34px;font-size:22px;cursor:pointer}.modal-card h2{font-size:30px;margin:0 0 4px}.tool-form{display:grid;gap:14px;margin-top:25px}.field label{display:block;font-size:12px;color:#aab5c8;margin-bottom:6px}.field input,.field textarea,.field select{width:100%;padding:12px 13px;border-radius:11px;border:1px solid #2a3853;background:#0a101b;color:#fff;outline:0}.field textarea{min-height:130px;resize:vertical}.btn{border:0;border-radius:11px;padding:12px 16px;background:linear-gradient(135deg,var(--accent),#4fbbff);color:#fff;font-weight:800;cursor:pointer}.result{margin-top:18px;padding:18px;border-radius:14px;background:#0a101a;border:1px solid #26344f}.result strong{font-size:25px;display:block;color:#8ee7ff}.formula{font-size:12px;color:#8391a8;margin-top:8px}.modal-related{border-top:1px solid #243049;margin-top:24px;padding-top:18px}.related-btn{background:#131d30;color:#b9c4d7;border:1px solid #263652;border-radius:9px;padding:7px 10px;margin:4px;cursor:pointer}
.prose{max-width:800px;margin:70px auto;padding-bottom:60px}.prose h1{font-size:42px}.prose h2{margin-top:35px}.prose p,.prose li{color:var(--muted)}.prose a{color:#83dfff}
@media(max-width:800px){.tool-grid{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:repeat(2,1fr)}.info-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.nav-links{display:none}.mobile-menu{display:block}}
@media(max-width:520px){.hero{padding:65px 0 45px}.tool-grid{grid-template-columns:1fr}.category-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.section{padding:52px 0}.hero h1{font-size:45px}.modal-card{padding:24px 18px}}

.library-actions{display:flex;align-items:center;gap:10px}.filter-btn{border:1px solid #2a3853;background:#101827;color:#aebbd0;border-radius:10px;padding:8px 11px;cursor:pointer;font-size:12px}.filter-btn[aria-pressed="true"]{color:#fff;border-color:#6678ff;background:#18213a}.tool-card-top{display:flex;align-items:center;justify-content:space-between}.favorite-btn{border:0;background:transparent;color:#64728a;font-size:22px;line-height:1;cursor:pointer;padding:2px 0}.favorite-btn:hover,.favorite-btn.active{color:#ffe28a}.category-card{font:inherit;color:inherit;text-align:left}.category-card.selected{border-color:#6375ff;background:#151e35;box-shadow:0 10px 30px rgba(0,0,0,.18)}.mobile-nav{display:none}.seo-intro{padding-top:48px;padding-bottom:48px}.error{border-color:#6b3841}.error strong{color:#ff9da8}
@media(max-width:800px){.site-header .nav{position:relative}.mobile-nav{position:absolute;display:grid;gap:4px;left:0;right:0;top:68px;background:#0b101b;border:1px solid #202c43;border-top:0;padding:10px 16px;box-shadow:0 20px 35px rgba(0,0,0,.3)}.mobile-nav a{padding:12px;border-radius:9px;color:#c1ccdd}.mobile-nav a:hover{background:#151e2f;color:#fff}.library-actions{align-items:center}.section-heading{align-items:flex-start;gap:12px}.section-heading h2{font-size:28px}}
@media(max-width:520px){.library-actions{width:100%;justify-content:space-between}.section-heading{display:block}.section-heading .library-actions{margin-top:10px}.search-wrap kbd{display:none}}