:root{
  --bg:#fcfcfd;
  --surface:#fff;
  --soft:#f2f5fb;
  --text:#152033;
  --muted:#5d697b;
  --line:#dfe5ef;
  --brand:#3159d8;
  --brand2:#2445aa;
  --shadow:0 12px 35px #182b4a12
}
*{
  box-sizing:border-box
}
html{
  scroll-behavior:smooth
}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif
}
a{
  color:var(--brand);
  text-decoration:none
}
a:hover{
  text-decoration:underline
}
h1,h2,h3{
  line-height:1.18;
  margin:0 0 .7rem;
  color:var(--text)
}
h1{
  font-size:clamp(2.3rem,5vw,4.4rem);
  letter-spacing:-.055em
}
h2{
  font-size:clamp(1.75rem,3vw,2.65rem);
  letter-spacing:-.035em
}
h3{
  font-size:1.2rem
}
p{
  margin:.2rem 0 1rem
}
.site-header{
  height:72px;
  padding:0 max(5vw,1.5rem);
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:sticky;
  top:0;
  z-index:10;
  background:#fcfcfdf0;
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)
}
.brand{
  font-weight:800;
  font-size:1.25rem;
  color:var(--text);
  letter-spacing:-.05em
}
.brand span{
  color:var(--brand)
}
nav{
  display:flex;
  gap:1.5rem;
  align-items:center
}
nav a,nav button{
  font:inherit;
  color:var(--text);
  border:0;
  background:transparent;
  cursor:pointer
}
.nav-tools{
  position:relative
}
.submenu{
  display:none;
  position:absolute;
  top:130%;
  right:0;
  width:190px;
  padding:.5rem;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  box-shadow:var(--shadow)
}
.submenu a{
  display:block;
  padding:.45rem .7rem
}
.nav-tools:focus-within .submenu,.nav-tools:hover .submenu{
  display:block
}
.theme-toggle{
  font-size:1.2rem
}
.menu-toggle{
  display:none;
  border:0;
  background:transparent;
  font-size:1.4rem
}
.hero,.section,.cta{
  padding:clamp(4rem,8vw,7rem) max(5vw,1.5rem);
  max-width:1400px;
  margin:auto
}
.hero{
  min-height:590px;
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:4rem;
  align-items:center
}
.hero>div:first-child{
  max-width:780px
}
.lead{
  font-size:1.2rem;
  color:var(--muted);
  max-width:650px
}
.eyebrow{
  text-transform:uppercase;
  letter-spacing:.12em;
  font-size:.77rem;
  font-weight:800;
  color:var(--brand);
  margin-bottom:.9rem
}
.actions{
  display:flex;
  flex-wrap:wrap;
  gap:.8rem;
  margin-top:1.7rem
}
.button{
  display:inline-block;
  padding:.78rem 1.1rem;
  border-radius:9px;
  background:var(--brand);
  color:#fff;
  font-weight:700;
  box-shadow:0 6px 15px #3159d833;
  transition:transform .2s,background .2s
}
.button:hover{
  background:var(--brand2);
  text-decoration:none;
  transform:translateY(-2px)
}
.button.secondary{
  background:transparent;
  color:var(--brand);
  box-shadow:none;
  border:1px solid var(--brand)
}
.hero-art{
  height:330px;
  border-radius:30px;
  background:linear-gradient(135deg,#3159d8,#79a3ff);
  color:#fff;
  position:relative;
  overflow:hidden;
  box-shadow:var(--shadow)
}
.hero-art span,.hero-art i,.hero-art b{
  position:absolute;
  font-style:normal;
  font-weight:800
}
.hero-art span{
  font-size:5rem;
  top:15%;
  left:12%
}
.hero-art i{
  font-size:4rem;
  right:15%;
  bottom:16%
}
.hero-art b{
  font-size:3rem;
  top:42%;
  left:45%;
  border:1px solid #fff6;
  padding:.6rem;
  border-radius:50%
}
.intro{
  padding-top:1rem;
  max-width:900px
}
.soft{
  background:var(--soft);
  max-width:none;
  padding-left:max(5vw,1.5rem);
  padding-right:max(5vw,1.5rem)
}
.soft .split{
  max-width:1250px;
  margin:auto
}
.grid{
  display:grid;
  gap:1.25rem
}
.tools-grid{
  grid-template-columns:repeat(2,1fr)
}
.three{
  grid-template-columns:repeat(3,1fr)
}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:15px;
  padding:1.5rem;
  box-shadow:0 5px 20px #192f4c08
}
.tool-card{
  transition:transform .2s,box-shadow .2s
}
.tool-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow)
}
.tool-icon{
  width:45px;
  height:45px;
  display:grid;
  place-items:center;
  border-radius:11px;
  background:#e9eeff;
  color:var(--brand);
  font-weight:900;
  margin-bottom:1rem
}
.split{
  display:grid;
  grid-template-columns:1fr .8fr;
  gap:3rem;
  align-items:center
}
.checklist{
  padding:0;
  list-style:none
}
.checklist li{
  margin:1rem 0;
  padding-left:1.8rem;
  position:relative
}
.checklist li:before{
  content:'✓';
  color:var(--brand);
  font-weight:900;
  position:absolute;
  left:0
}
.quote-card{
  background:var(--text);
  color:#fff;
  border-radius:18px;
  padding:2.2rem;
  font-size:1.35rem;
  line-height:1.5
}
.quote-card small,blockquote cite{
  display:block;
  margin-top:1rem;
  font-size:.85rem;
  color:#b9c5da
}
.cta{
  text-align:center;
  background:linear-gradient(130deg,#e9efff,#f8faff);
  max-width:none
}
.faq{
  max-width:900px
}
.faq details{
  padding:1rem 0;
  border-bottom:1px solid var(--line)
}
summary{
  font-weight:700;
  cursor:pointer
}
blockquote{
  margin:0
}
footer{
  padding:3rem max(5vw,1.5rem) 1.5rem;
  border-top:1px solid var(--line);
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:2rem
}
footer h2{
  font-size:1rem
}
footer a{
  display:block;
  margin:.3rem 0
}
.copyright{
  grid-column:1/-1;
  border-top:1px solid var(--line);
  padding-top:1rem;
  color:var(--muted);
  font-size:.9rem
}
.back-top{
  position:fixed;
  right:1rem;
  bottom:1rem;
  width:42px;
  height:42px;
  border:0;
  border-radius:50%;
  background:var(--text);
  color:#fff;
  display:none;
  cursor:pointer
}
.back-top.show{
  display:block
}
.breadcrumb{
  max-width:1400px;
  margin:1.3rem auto 0;
  padding:0 max(5vw,1.5rem);
  font-size:.9rem;
  color:var(--muted)
}
.page-hero{
  padding:4.5rem max(5vw,1.5rem) 2rem;
  max-width:1400px;
  margin:auto
}
.page-hero p{
  max-width:700px;
  color:var(--muted);
  font-size:1.1rem
}
.tool-shell{
  max-width:1400px;
  margin:auto;
  padding:1.5rem max(5vw,1.5rem) 5rem
}
.converter{
  border:1px solid var(--line);
  padding:1rem;
  border-radius:16px;
  background:var(--surface);
  box-shadow:var(--shadow)
}
.converter-grid{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  gap:1rem;
  align-items:center
}
.pane label{
  font-size:.85rem;
  font-weight:800;
  display:block;
  margin-bottom:.5rem
}
.pane textarea{
  width:100%;
  height:330px;
  resize:vertical;
  border:1px solid var(--line);
  border-radius:10px;
  padding:1rem;
  background:var(--bg);
  font:13px/1.55 ui-monospace,SFMono-Regular,Consolas,monospace;
  color:var(--text)
}
.convert-btn{
  border:0;
  border-radius:9px;
  padding:.8rem 1rem;
  background:var(--brand);
  color:#fff;
  font-weight:800;
  cursor:pointer
}
.tool-status{
  min-height:1.5rem;
  margin:.7rem 0 0;
  color:var(--muted);
  font-size:.9rem
}
.tool-status.error{
  color:#b42318
}
.content{
  max-width:900px;
  margin:3rem auto 0
}
.content section{
  margin:3rem 0
}
.content li{
  margin:.45rem 0
}
.callout{
  padding:1.25rem 1.5rem;
  background:var(--soft);
  border-left:4px solid var(--brand);
  border-radius:0 10px 10px 0
}
.form{
  max-width:750px;
  margin:1rem auto 4rem
}
.form label{
  font-weight:700;
  display:block;
  margin:1rem 0 .35rem
}
.form input,.form textarea{
  width:100%;
  padding:.75rem;
  border:1px solid var(--line);
  border-radius:8px;
  background:var(--surface);
  font:inherit
}
.form textarea{
  min-height:150px
}
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2rem
}
.notice{
  padding:1rem;
  border-radius:8px;
  background:#e8f7ed;
  color:#156b35;
  display:none
}
.notice.show{
  display:block
}
body.dark{
  --bg:#111827;
  --surface:#182233;
  --soft:#202c40;
  --text:#edf3ff;
  --muted:#b7c3d7;
  --line:#304057;
  --brand:#8aa8ff;
  --brand2:#a7bcff
}
.dark .site-header{
  background:#111827eF
}