:root{
  --bg:#fff; --text:#0f172a; --muted:#475569;
  --border: rgba(15,23,42,.12);
  --accent:#2D9CDB;
  --radius:18px;
  --container:1120px;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background:
    radial-gradient(1000px 520px at 12% 0%, rgba(45,156,219,0.10), rgba(255,255,255,0) 70%),
    radial-gradient(900px 520px at 90% 10%, rgba(15,23,42,0.06), rgba(255,255,255,0) 60%),
    var(--bg);
  color:var(--text);
}
a{color:inherit;text-decoration:none}

.container{width:min(var(--container), calc(100% - 40px)); margin:0 auto;}
.page{padding:26px 0 20px;}

/* Header: gradient */
.site-header{
  position:sticky;top:0;z-index:50;
  background: linear-gradient(90deg, #2D9CDB 0%, #1E78B9 100%);
  border-bottom:1px solid rgba(255,255,255,.16);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;}

.brand{display:flex;align-items:center;gap:14px;min-width:280px;}
.brand-logo{
  width:128px;
  max-height:44px;
  height:auto;
  background:transparent;border:0;padding:0;border-radius:0;
  object-fit:contain;
  filter: drop-shadow(0 8px 16px rgba(2,8,23,0.28));
}
.brand-text{display:grid;gap:2px;}
.brand-title{font-weight:850;letter-spacing:-.02em;color:#fff;line-height:1.1;}
.brand-subtitle{font-size:13px;color:rgba(255,255,255,.88);}

.nav{display:flex;align-items:center;gap:10px;}
.nav-link{font-size:14px;color:rgba(255,255,255,.92);padding:8px 10px;border-radius:12px;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.16);}

.section-head{display:grid;gap:8px;margin-bottom:16px;}
.section-title{margin:0;font-size:clamp(22px,2.4vw,30px);letter-spacing:-.03em;}
.section-subtitle{margin:0;color:var(--muted);line-height:1.6;max-width:80ch;}

/* Grid 4-up */
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;}
.tool-card{
  background: rgba(255,255,255,.92);
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(2,8,23,.05);
  padding:16px;
  display:grid;gap:10px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.tool-card:hover{
  transform: translateY(-2px);
  border-color: rgba(45,156,219,.45);
  box-shadow: 0 16px 38px rgba(2,8,23,.08);
}
.tool-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;}
.tool-icon{
  width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
  background: rgba(45,156,219,.12);
  border:1px solid rgba(45,156,219,.30);
  font-size:18px;
}
.badge{
  font-size:11px;color:var(--muted);
  border:1px solid var(--border);
  padding:5px 8px;border-radius:999px;
  background: rgba(15,23,42,.03);
  white-space:nowrap;
}
.tool-card-title{margin:0;font-size:15px;letter-spacing:-.02em;}
.tool-desc{margin:0;color:var(--muted);font-size:13px;line-height:1.55;}

.tool-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:2px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 12px;border-radius:14px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.92);
  font-weight:750;font-size:13px;cursor:pointer;
}
.btn:hover{border-color: rgba(45,156,219,.45);}
.btn-primary{
  background: var(--accent); color:#fff; border-color: transparent;
  box-shadow: 0 10px 22px rgba(45,156,219,.22);
}
.btn-primary:hover{filter:brightness(.98);}

/* Tool pages */
.tool-hero{
  margin: 0 0 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.92);
  box-shadow: 0 10px 28px rgba(2,8,23,.05);
}
.tool-hero-top{display:flex;align-items:center;gap:12px;}
.tool-hero-icon{
  width:44px;height:44px;border-radius:16px;display:grid;place-items:center;
  background: rgba(45,156,219,.12);
  border:1px solid rgba(45,156,219,.30);
  font-size:20px;
}
.tool-title{margin:0;font-size:22px;letter-spacing:-.03em;}
.tool-subtitle{margin:6px 0 0;color:var(--muted);line-height:1.6;}

.tool-shell{
  margin-top: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.92);
  box-shadow: 0 10px 28px rgba(2,8,23,.05);
}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.field{display:grid;gap:6px;}
label{font-size:12px;color:var(--muted);}
input, select, textarea{
  width:100%;
  border:1px solid var(--border);
  border-radius:14px;
  padding:10px 12px;
  font-size:14px;
  background:#fff;
  outline:none;
}
textarea{resize:vertical;min-height:120px;line-height:1.5;}
.result{
  margin-top:12px;
  padding:12px;
  border-radius:14px;
  border:1px solid rgba(45,156,219,.28);
  background: rgba(45,156,219,.08);
  color:#0b3a55;
  line-height:1.6;
}
.small{font-size:12px;color:var(--muted);line-height:1.5;margin-top:8px;}

/* Footer */
.site-footer{padding:20px 0;border-top:1px solid var(--border);background:rgba(255,255,255,.7);}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.muted{color:var(--muted);margin:0;font-size:13px;}
.footer-links{display:flex;gap:12px;}
.muted-link{color:var(--muted);font-size:13px;padding:6px 8px;border-radius:10px;}
.muted-link:hover{color:var(--text);background:rgba(15,23,42,.04);}

@media (max-width:1100px){ .grid{grid-template-columns:repeat(3,1fr);} }
@media (max-width:860px){
  .grid{grid-template-columns:repeat(2,1fr);}
  .brand-subtitle{display:none;}
  .brand-logo{max-height:40px;}
  .form-grid{grid-template-columns:1fr;}
}
@media (max-width:560px){
  .grid{grid-template-columns:1fr;}
  .nav{display:none;}
}