:root{
  --indigo:#1E2A78; --indigo-d:#16205e; --indigo-l:#2f3f9e;
  --cyan:#4BCFFA; --accent:#ff5773; --accent-d:#eb4864;
  --bg:#eef1f5; --panel:#ffffff; --ink:#2b2f38; --muted:#6b7280; --line:#e6e8ee;
  --nav-h:64px; --radius:14px; --radius-lg:18px;
  --shadow:0 10px 40px rgba(30,42,120,.10);
  --shadow-hover:0 18px 50px rgba(30,42,120,.16);
  --maxw:1120px;
}

*{margin:0;padding:0;box-sizing:border-box;font-family:'Roboto',sans-serif;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;}
img{display:block;max-width:100%;}
a{text-decoration:none;}
.container{width:90%;max-width:var(--maxw);margin:0 auto;padding:0;}

 
.navbar{
  position:fixed;top:0;left:0;width:100%;height:var(--nav-h);z-index:1000;
  display:flex;align-items:center;gap:18px;padding:0 clamp(16px,4vw,40px);
  background:rgba(16,22,54,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);box-shadow:none;justify-content:flex-start;color:#fff;
}
.navbar .brand{font-size:1.15rem;font-weight:900;color:#fff;letter-spacing:-.02em;margin-right:auto;}
.navbar .brand .dot{color:var(--cyan);}
.navbar ul{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;}
.navbar li{margin:0;}
.navbar ul li a{color:rgba(255,255,255,.82);font-weight:500;font-size:.95rem;padding:8px 14px;border-radius:9px;transition:color .18s,background .18s;}
.navbar ul li a:hover{color:#fff;background:rgba(255,255,255,.10);}
.navbar ul li a.active{color:#fff;background:rgba(75,207,250,.18);}
.hamburger{display:none;background:none;border:0;color:#fff;font-size:1.3rem;cursor:pointer;width:42px;height:42px;border-radius:10px;transition:background .18s;}
.hamburger:hover{background:rgba(255,255,255,.12);}
.current-page[hidden]{display:none;}

 
.hero{
  position:relative;min-height:56svh;display:flex;align-items:center;justify-content:center;text-align:center;
  color:#fff;overflow:hidden;padding:calc(var(--nav-h) + 44px) 20px 60px;
  background:linear-gradient(135deg,var(--indigo) 0%,var(--indigo-l) 55%,#3b52c9 100%);
}
.hero-overlay{position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(60% 60% at 85% 15%, rgba(75,207,250,.35), transparent 60%),
    radial-gradient(50% 50% at 10% 90%, rgba(255,87,115,.22), transparent 60%);}
.hero-content{position:relative;z-index:2;max-width:680px;margin:0 auto;width:100%;}
.hero-eyebrow{text-transform:uppercase;letter-spacing:.28em;font-size:.76rem;font-weight:700;color:var(--cyan);margin-bottom:14px;opacity:0;animation:fadeUp .7s .05s ease forwards;}
.hero h1{font-size:clamp(2.4rem,6vw,3.8rem);font-weight:900;letter-spacing:-.03em;line-height:1.05;margin-bottom:12px;opacity:0;animation:fadeUp .7s .15s ease forwards;}
.hero-lead{font-size:clamp(1rem,1.6vw,1.12rem);color:rgba(255,255,255,.85);max-width:540px;margin:0 auto 28px;opacity:0;animation:fadeUp .7s .3s ease forwards;}
.search-filter{opacity:0;animation:fadeUp .7s .42s ease forwards;}
.search-bar{position:relative;max-width:440px;margin:0 auto;}
.search-bar i{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:.95rem;}
.search-bar input{
  width:100%;padding:15px 18px 15px 46px;border:0;border-radius:12px;background:#fff;color:var(--ink);
  font-size:1rem;box-shadow:0 12px 30px rgba(0,0,0,.18);outline:none;transition:box-shadow .18s;
}
.search-bar input:focus{box-shadow:0 12px 30px rgba(0,0,0,.18),0 0 0 3px rgba(75,207,250,.5);}

 
.tools-section{padding:clamp(56px,8vw,90px) 0;background:var(--bg);}
.platform-bridge{
  display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;margin:0 auto 26px;
  padding:clamp(24px,4vw,36px);border:1px solid rgba(75,207,250,.35);border-radius:var(--radius-lg);
  color:#fff;background:linear-gradient(135deg,#111d4b,#1e2a78 62%,#25458a);box-shadow:var(--shadow);
}
.platform-bridge-label{display:inline-block;margin-bottom:8px;color:var(--cyan);font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;}
.platform-bridge h2{margin:0 0 8px;font-size:clamp(1.35rem,2.6vw,2rem);line-height:1.15;letter-spacing:-.02em;}
.platform-bridge p{max-width:720px;margin:0;color:rgba(255,255,255,.76);font-size:.94rem;}
.platform-bridge-action{display:inline-flex;align-items:center;gap:9px;min-height:46px;padding:12px 18px;border-radius:11px;color:#071426;background:var(--cyan);font-size:.9rem;font-weight:800;white-space:nowrap;transition:transform .18s,box-shadow .18s;}
.platform-bridge-action:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(75,207,250,.28);}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px;max-width:var(--maxw);margin:0 auto;}
.tool-card{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 26px;cursor:pointer;transition:transform .18s,box-shadow .18s,border-color .18s;
}
.tool-card[data-tool]:hover,.tool-card:not(.is-soon):hover{transform:translateY(-6px);border-color:var(--cyan);box-shadow:var(--shadow-hover);}
.tool-card.is-soon{cursor:default;opacity:.92;}
.badge-new,.badge-soon{
  position:absolute;top:16px;right:16px;font-size:.68rem;font-weight:700;letter-spacing:.05em;
  text-transform:uppercase;padding:4px 10px;border-radius:999px;color:#fff;
}
.badge-new{background:var(--accent);}
.badge-soon{background:#8791a3;}
.tool-icon{width:56px;height:56px;border-radius:15px;display:flex;align-items:center;justify-content:center;background:#eef1fb;color:var(--indigo);font-size:1.5rem;margin-bottom:18px;transition:background .18s,color .18s;}
.tool-card:not(.is-soon):hover .tool-icon{background:var(--indigo);color:#fff;}
.tool-card h3{color:var(--indigo);font-size:1.2rem;font-weight:700;margin-bottom:9px;}
.tool-card p{color:var(--muted);font-size:.95rem;margin-bottom:22px;}
.launch-btn{
  display:inline-flex;align-items:center;gap:8px;background:var(--indigo);color:#fff;
  padding:10px 18px;border-radius:10px;font-weight:600;font-size:.9rem;transition:background .18s,gap .18s;
}
.tool-card:hover .launch-btn:not(.disabled-link){background:var(--indigo-d);gap:12px;}
.launch-btn.disabled-link{background:#e7eaf1;color:#98a1b3;cursor:not-allowed;pointer-events:none;}
#noResults{display:none;text-align:center;font-size:1.05rem;color:var(--accent);font-weight:600;margin-top:30px;}

 
.footer{background:var(--indigo-d);color:#fff;text-align:center;padding:30px 0;margin:0;}
.footer p{font-size:.92rem;color:rgba(255,255,255,.78);}

 
.modal{
  display:none;position:fixed;inset:0;z-index:2000;overflow-y:auto;
  background:rgba(16,22,54,.55);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);
  padding:40px 16px;
}
.modal-content{
  position:relative;background:var(--panel);max-width:520px;margin:2vh auto;border-radius:var(--radius-lg);
  padding:clamp(26px,3.5vw,38px);box-shadow:0 30px 70px rgba(15,23,42,.34);
  animation:modalIn .22s ease-out;
}
@keyframes modalIn{from{opacity:0;transform:translateY(16px) scale(.98);}to{opacity:1;transform:none;}}
.modal .close{
  position:absolute;top:14px;right:16px;width:44px;height:44px;border-radius:10px;display:flex;
  align-items:center;justify-content:center;font-size:1.5rem;line-height:1;color:var(--muted);
  cursor:pointer;transition:background .16s,color .16s;
}
.modal .close:hover{background:#f1f3f8;color:var(--accent);}
.modal-content h2{color:var(--indigo);font-size:1.4rem;font-weight:800;letter-spacing:-.01em;margin-bottom:12px;padding-right:32px;}
.modal-content h3{color:var(--indigo);font-size:1rem;font-weight:700;margin:16px 0 8px;}
.modal-content p{color:#4b5163;font-size:.96rem;margin-bottom:10px;}
.modal-content ol,.modal-content ul{margin:0 0 6px 20px;color:#4b5163;font-size:.95rem;}
.modal-content li{margin:4px 0;}
.formula{display:inline-block;background:#eef1fb;color:var(--indigo);font-weight:700;font-size:1.1rem;padding:8px 16px;border-radius:10px;margin:6px 0;}

 
.next-btn{
  margin-top:16px;width:100%;background:var(--indigo);color:#fff;border:0;border-radius:11px;
  padding:13px 18px;font-size:.98rem;font-weight:700;cursor:pointer;transition:background .16s,transform .16s;
}
.next-btn:hover{background:var(--indigo-d);transform:translateY(-1px);}

 
.input-group{margin-bottom:14px;}
.input-group label{display:block;font-size:.84rem;font-weight:600;color:#3a4256;margin-bottom:6px;}
.input-group input,.input-group select{
  width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:11px;background:#fbfcfe;
  font-size:.95rem;color:var(--ink);outline:none;transition:border-color .16s,box-shadow .16s,background .16s;
  font-family:inherit;
}
.input-group input:focus,.input-group select:focus{border-color:var(--cyan);background:#fff;box-shadow:0 0 0 3px rgba(75,207,250,.16);}
.converter-container{display:flex;flex-direction:column;gap:6px;}
.or-divider{text-align:center;font-size:.78rem;font-weight:700;color:var(--muted);letter-spacing:.1em;margin:2px 0;}

.modal-actions{display:flex;gap:10px;margin-top:8px;}
.calculate-btn{
  flex:1;background:var(--accent);color:#fff;border:0;border-radius:11px;padding:12px 18px;
  min-height:44px;font-size:.96rem;font-weight:700;cursor:pointer;box-shadow:0 8px 20px rgba(255,87,115,.28);transition:background .16s,transform .16s;
}
.calculate-btn:hover{background:var(--accent-d);transform:translateY(-1px);}
.calculate-btn:disabled{opacity:.7;cursor:not-allowed;transform:none;box-shadow:none;}
.reset-btn,#reset-btn{
  background:#fff;color:var(--ink);border:1.5px solid var(--line);border-radius:11px;padding:12px 18px;
  font-size:.96rem;font-weight:600;cursor:pointer;transition:border-color .16s,color .16s;
}
.reset-btn:hover,#reset-btn:hover{border-color:var(--cyan);color:var(--indigo);}

 
.results{margin-top:16px;}
.results:empty{margin-top:0;}
.results h4{color:var(--indigo);font-size:1rem;font-weight:700;margin-bottom:8px;}
.results p{background:#f6f8fc;border:1px solid var(--line);border-left:4px solid var(--cyan);border-radius:9px;padding:9px 13px;margin-bottom:7px;font-size:.94rem;color:#3a4256;}
.results .error{background:#fff2f4;border-color:#ffd0d8;border-left-color:var(--accent);color:#b42438;}
.band-table{width:100%;border-collapse:collapse;margin-top:6px;font-size:.9rem;overflow:hidden;border-radius:10px;}
.band-table th{background:var(--indigo);color:#fff;text-align:left;padding:9px 11px;font-weight:600;}
.band-table td{padding:9px 11px;border-bottom:1px solid var(--line);color:#3a4256;}
.band-table tr:nth-child(even) td{background:#f6f8fc;}

 
@keyframes fadeUp{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:none;}}

 
@media(max-width:820px){
  .hamburger{display:flex;align-items:center;justify-content:center;}
  .navbar ul{display:none;position:absolute;top:var(--nav-h);left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;padding:10px 14px 16px;background:rgba(16,22,54,.97);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.10);}
  .navbar ul.active{display:flex;}
  .navbar ul li a{display:block;padding:12px 14px;font-size:1rem;border-radius:10px;}
  .platform-bridge{grid-template-columns:1fr;}
  .platform-bridge-action{justify-content:center;width:100%;}
}
@media(max-width:560px){
  .modal{padding:20px 10px;}
  .modal-actions{flex-direction:column;}
}

 
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:8px;}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;}
  html{scroll-behavior:auto;}
}