/* Base */
:root{
  --blue:#1f6fff;
  --blue-dark:#1054d6;
  --blue-light:#eef4ff;
  --text:#101828;
  --muted:#667085;
  --border:#dbe3f0;
  --bg:#f7f9fc;
  --white:#ffffff;
  --success:#067647;
  --shadow:0 18px 40px rgba(16,24,40,.08);
  --radius:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#f8fbff 0%,#f7f9fc 100%);
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1120px,calc(100% - 32px));margin-inline:auto}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(180%) blur(12px);
  background:rgba(255,255,255,.88);
  border-bottom:1px solid rgba(219,227,240,.85);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  min-height:74px;gap:20px;
}
.brand{
  font-size:1.4rem;font-weight:800;letter-spacing:-.03em;color:var(--text)
}
.brand span{color:var(--blue)}
.nav-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a{
  color:var(--muted);font-weight:600;font-size:.98rem
}
.nav-links a:hover{color:var(--blue)}

/* Hero */
.hero{padding:56px 0 24px}
.hero-grid{
  display:grid;
  grid-template-columns:1.5fr .8fr;
  gap:26px;
  align-items:start;
}
.eyebrow{
  display:inline-block;
  padding:8px 12px;
  background:var(--blue-light);
  color:var(--blue-dark);
  border-radius:999px;
  font-size:.88rem;
  font-weight:700;
  margin-bottom:16px;
}
.hero h1{
  font-size:clamp(2.1rem,4vw,4.2rem);
  line-height:1.02;
  letter-spacing:-.04em;
  margin:0 0 16px;
}
.lead{
  color:var(--muted);
  font-size:1.1rem;
  max-width:680px;
  margin-bottom:20px;
}
.hero-badges{
  display:flex;flex-wrap:wrap;gap:10px
}
.hero-badges span{
  background:#fff;border:1px solid var(--border);
  padding:10px 14px;border-radius:999px;
  color:#344054;font-weight:600;font-size:.93rem
}
.premium-card{
  background:linear-gradient(180deg,#fff 0%,#f9fbff 100%);
  border:1px solid var(--border);
  border-radius:24px;
  padding:24px;
  box-shadow:var(--shadow);
}
.premium-label{
  margin:0 0 8px;
  color:var(--blue);
  font-weight:800;
  text-transform:uppercase;
  font-size:.8rem;
  letter-spacing:.08em;
}
.premium-card h2{margin:0 0 10px;font-size:1.5rem}
.premium-card ul{
  padding-left:18px;
  color:var(--muted);
  margin:0 0 18px;
}
.ghost-btn{
  width:100%;
  border:1px solid var(--border);
  background:#fff;
  color:#344054;
  font-weight:700;
  padding:14px 16px;
  border-radius:14px;
}

/* Tool */
.tool-section{padding:8px 0 24px}
.ad-slot{
  background:repeating-linear-gradient(135deg,#f4f7fb 0,#f4f7fb 12px,#eef2f8 12px,#eef2f8 24px);
  border:1px dashed #c8d4e8;
  color:#64748b;
  border-radius:16px;
  padding:20px;
  text-align:center;
  font-weight:700;
  margin-bottom:22px;
}
.ad-slot-bottom{margin-top:22px}
.tool-card{
  background:var(--white);
  border:1px solid rgba(219,227,240,.95);
  border-radius:28px;
  box-shadow:var(--shadow);
  padding:28px;
}
.tool-head h2{
  margin:0 0 8px;
  font-size:1.7rem;
  letter-spacing:-.03em;
}
.tool-head p{margin:0 0 20px;color:var(--muted)}
.drop-zone{
  border:2px dashed #b7c7e7;
  border-radius:22px;
  background:linear-gradient(180deg,#fbfdff 0%,#f6f9ff 100%);
  padding:34px 20px;
  text-align:center;
  cursor:pointer;
  transition:.2s ease;
}
.drop-zone:hover,.drop-zone.dragover{
  border-color:var(--blue);
  background:#eef4ff;
  transform:translateY(-1px);
}
.drop-inner{display:grid;gap:8px}
.drop-icon{font-size:2rem}
.drop-title{
  font-size:1.1rem;
  font-weight:800;
}
.drop-subtitle{
  color:var(--muted);
  margin:0;
}
.message{
  min-height:28px;
  margin:16px 2px 6px;
  font-weight:700;
  color:var(--muted);
}
.message.success{color:var(--success)}
.message.error{color:#b42318}
.controls{
  display:grid;
  grid-template-columns:1.4fr .8fr;
  gap:18px;
  align-items:end;
  margin-top:12px;
}
.control-block{
  background:#f9fbff;
  border:1px solid var(--border);
  border-radius:18px;
  padding:18px;
}
.control-block label{
  display:block;
  margin-bottom:8px;
  font-weight:800;
}
.range-row{
  display:flex;
  align-items:center;
  gap:14px;
}
.range-row input{width:100%}
.hint{
  margin:10px 0 0;
  color:var(--muted);
  font-size:.92rem;
}
.actions{display:grid;gap:12px}
.primary-btn,.secondary-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:52px;
  padding:0 18px;
  border-radius:16px;
  font-weight:800;
  border:none;
  cursor:pointer;
  transition:.2s ease;
}
.primary-btn{
  background:var(--blue);
  color:#fff;
}
.primary-btn:hover{background:var(--blue-dark)}
.primary-btn[disabled],.secondary-btn[disabled]{
  opacity:.5;cursor:not-allowed
}
.secondary-btn{
  background:#fff;
  border:1px solid var(--border);
  color:#344054;
}
.results{margin-top:22px}
.hidden{display:none}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.stat-card{
  background:#f9fbff;
  border:1px solid var(--border);
  border-radius:18px;
  padding:18px;
}
.stat-label{
  display:block;
  font-size:.9rem;
  color:var(--muted);
  margin-bottom:4px;
}
.stat-card strong{
  font-size:1.35rem;
  letter-spacing:-.03em;
}
.preview-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
  margin-top:18px;
}
.preview-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:18px;
  padding:16px;
}
.preview-card h3{
  margin:0 0 12px;
  font-size:1rem;
}
.preview-card img{
  width:100%;
  max-height:320px;
  object-fit:contain;
  background:#f8fafc;
  border-radius:12px;
}
.download-wrap{
  margin-top:18px;
  display:flex;
  justify-content:center;
}
.download-wrap .primary-btn{
  text-decoration:none;
  min-width:280px;
}

/* Content */
.seo-section,.faq-section{
  padding:22px 0 38px;
}
.prose{
  background:#fff;
  border:1px solid var(--border);
  border-radius:24px;
  padding:28px;
  box-shadow:var(--shadow);
}
.prose h2,.faq-section h2{
  font-size:1.7rem;
  letter-spacing:-.03em;
  margin:0 0 12px;
}
.prose h3{
  font-size:1.15rem;
  margin:20px 0 8px;
}
.prose p{
  color:#344054;
  margin:0 0 8px;
}
.faq-list{
  display:grid;
  gap:12px;
}
.faq-list details{
  background:#fff;
  border:1px solid var(--border);
  border-radius:18px;
  padding:18px 20px;
  box-shadow:var(--shadow);
}
.faq-list summary{
  cursor:pointer;
  font-weight:800;
}
.faq-list p{
  color:var(--muted);
  margin:12px 0 0;
}

/* Footer */
.site-footer{
  border-top:1px solid var(--border);
  background:#fff;
}
.footer-grid{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding:28px 0;
}
.brand-footer{font-size:1.2rem}
.site-footer p{color:var(--muted);max-width:420px}
.footer-links{
  display:grid;
  gap:10px;
  text-align:right;
}
.footer-links a{color:var(--muted);font-weight:600}
.footer-links a:hover{color:var(--blue)}

.simple-page{
  padding:54px 0 40px;
}
.simple-wrap{
  background:#fff;
  border:1px solid var(--border);
  border-radius:26px;
  padding:30px;
  box-shadow:var(--shadow);
}
.simple-wrap h1{
  margin:0 0 14px;
  font-size:2rem;
  letter-spacing:-.03em;
}
.simple-wrap h2{
  margin:22px 0 10px;
}
.simple-wrap p,.simple-wrap li{
  color:#344054;
}
.simple-wrap ul{padding-left:20px}
.notice{
  margin-top:18px;
  padding:14px 16px;
  border-radius:16px;
  background:var(--blue-light);
  color:var(--blue-dark);
  font-weight:700;
}

/* Responsive */
@media (max-width: 900px){
  .hero-grid,.controls,.preview-grid,.stats-grid{
    grid-template-columns:1fr;
  }
  .footer-grid{
    flex-direction:column;
  }
  .footer-links{text-align:left}
}
@media (max-width: 640px){
  .nav{
    min-height:64px;
  }
  .nav-links{
    display:none;
  }
  .tool-card,.prose,.simple-wrap{
    padding:20px;
    border-radius:22px;
  }
  .hero{
    padding-top:34px;
  }
  .hero h1{
    font-size:2.35rem;
  }
}