@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');
:root{--teal-1:#0d9488;--teal-2:#0f766e;--bg:#06110f;--surface:#0e1b18;--text:#e8f6f4;--muted:#9cc6c1;--card:#112623;--border:#1f4742;--shadow:0 12px 26px rgba(0,0,0,.35)}
:root.light{--bg:#f2fbfa;--surface:#ffffff;--text:#12302c;--muted:#4c6d68;--card:#ffffff;--border:#d4ebe8;--shadow:0 10px 24px rgba(9,84,77,.12)}
*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:'Poppins',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}
a{color:inherit;text-decoration:none}img{max-width:100%}
.skip{position:absolute;left:-9999px;top:auto}.skip:focus{left:10px;top:10px;background:var(--teal-1);color:#fff;padding:10px;border-radius:8px;z-index:1000}
.site-header{position:sticky;top:0;z-index:50;background:linear-gradient(120deg,var(--teal-1),var(--teal-2));box-shadow:var(--shadow)}
.nav{max-width:1200px;margin:auto;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.nav-links{display:flex;gap:10px;flex-wrap:wrap}.nav-links a,.theme-btn{padding:10px 12px;border-radius:10px;min-height:44px;display:inline-flex;align-items:center}
.nav-links a:hover,.nav-links a:focus-visible,.theme-btn:hover,.theme-btn:focus-visible{background:rgba(255,255,255,.14);outline:none}
.theme-btn{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;cursor:pointer}
main{max-width:1200px;margin:auto;padding:22px 16px 48px}
.hero{display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:center;padding:20px 0 24px}.hero h1{font-size:clamp(1.7rem,4vw,2.8rem);margin:0 0 8px}.hero p{margin:0;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:16px}
.grid{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
label{display:block;font-weight:600;margin-bottom:6px}input,select,textarea,button{font:inherit}input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:10px}
button.primary{background:linear-gradient(120deg,var(--teal-1),var(--teal-2));border:0;color:#fff;padding:11px 14px;border-radius:10px;cursor:pointer;min-height:44px}
button.secondary{background:transparent;border:1px solid var(--border);color:var(--text);padding:10px;border-radius:10px;min-height:44px}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid #5eead4;outline-offset:2px}
.result{font-weight:600;font-size:1.05rem}
.site-footer{margin-top:40px;background:var(--surface);border-top:1px solid var(--border)}.footer-wrap{max-width:1200px;margin:auto;padding:28px 16px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
@media(max-width:1024px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-wrap{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:768px){.hero{grid-template-columns:1fr}.grid-2,.grid-3{grid-template-columns:1fr}}
@media(max-width:640px){main{padding:18px 12px 40px}.nav{padding:10px 12px}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}