:root{
  --white:   #ffffff;
  --off:     #f7f7f7;
  --line:    #e2e2e2;
  --gray-mid:#8a8a8a;
  --gray-dk: #4a4a4a;
  --black:   #1a1a1a;
}

*{ box-sizing:border-box; margin:0; padding:0; }

body{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{ color:inherit; text-decoration:none; }

.wrap{
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
header{ border-bottom: 1px solid var(--line); }
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 22px 24px;
}
.logo{ font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
nav{ display:flex; gap: 28px; }
nav a{
  font-size: 14px;
  color: var(--gray-dk);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
nav a:hover, nav a.active{
  color: var(--black);
  border-bottom-color: var(--black);
}

/* ---------- hero / page header ---------- */
.hero, .page-header{
  padding: 72px 0 40px 0;
  border-bottom: 1px solid var(--line);
}
.hero h1, .page-header h1{
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero p{
  font-size: 16px;
  color: var(--gray-dk);
  max-width: 520px;
}

/* ---------- generic sections ---------- */
.section{ padding: 56px 0; }
.section-title{
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-mid);
  margin-bottom: 24px;
}

/* ---------- tool cards (used on homepage) ---------- */
.tools-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.tool-card{
  display: block;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 22px;
  background: var(--white);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.tool-card:hover{ border-color: var(--gray-mid); background: var(--off); }
.tool-card h3{ font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.tool-card p{ font-size: 14px; color: var(--gray-dk); }
.tool-card .tag{
  display:inline-block;
  margin-top: 14px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-mid);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3px 8px;
}
.tool-card.soon{ color: var(--gray-mid); cursor: default; }
.tool-card.soon:hover{ border-color: var(--line); background: var(--white); }
.tool-card.soon h3{ color: var(--gray-mid); }

/* ---------- ad slot placeholder ---------- */
.ad-slot{
  border: 1px dashed var(--line);
  border-radius: 6px;
  padding: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--gray-mid);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---------- long-form content (about page etc.) ---------- */
.content{ padding: 48px 0; max-width: 640px; }
.content p{ font-size: 16px; color: var(--gray-dk); margin-bottom: 20px; }
.content h2{
  font-size: 15px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--gray-mid); margin: 36px 0 14px 0;
}
.content ul{ list-style: none; margin-bottom: 20px; }
.content li{ font-size: 16px; color: var(--gray-dk); padding: 10px 0; border-bottom: 1px solid var(--line); }
.content li:first-child{ border-top: 1px solid var(--line); }
.content li strong{ color: var(--black); }
.contact{ display:inline-block; margin-top: 8px; font-size: 15px; color: var(--black); border-bottom: 1px solid var(--black); }
.contact:hover{ color: var(--gray-dk); border-color: var(--gray-dk); }

/* ---------- tool page shell ---------- */
.tool-header{ padding: 48px 0 32px 0; border-bottom: 1px solid var(--line); }
.tool-header h1{ font-size: clamp(26px, 4vw, 36px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 10px; }
.tool-header p{ font-size: 15px; color: var(--gray-dk); max-width: 560px; }
.tool-body{ padding: 40px 0; }
.tool-panel{
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  background: var(--off);
}
.tool-panel .btn{
  display:inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  background: var(--black);
  border: none;
  border-radius: 5px;
  padding: 10px 18px;
  cursor:pointer;
  transition: background 0.15s ease;
}
.tool-panel .btn:hover{ background: var(--gray-dk); }
.tool-panel input[type="file"]{ font-size: 14px; }

/* ---------- footer ---------- */
footer{ border-top: 1px solid var(--line); padding: 28px 0; margin-top: 24px; }
.footer-inner{
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--gray-mid);
}
footer nav{ gap: 20px; }
footer nav a{ color: var(--gray-mid); font-size: 13px; }
footer nav a:hover{ color: var(--black); border-color: transparent; }

@media (max-width: 560px){
  .header-inner{ flex-direction:column; align-items:flex-start; gap: 14px; }
  .hero, .page-header, .tool-header{ padding: 48px 0 32px 0; }
}