:root {
  --ink: #16181d; --muted: #6b7280; --accent: #2563eb; --accent-2: #1d4ed8;
  --line: #e5e7eb; --bg: #ffffff; --soft: #f6f8fb; --good: #15803d;
}
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--ink); background: var(--bg); line-height: 1.65;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 20px; border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.logo { font-weight: 800; font-size: 1.15rem; color: var(--ink); }
.site-head nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-head nav a { color: var(--ink); font-size: .95rem; }

main { max-width: 880px; margin: 0 auto; padding: 28px 20px 60px; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 18px 0 10px; }
h2 { font-size: 1.25rem; margin: 34px 0 10px; }
.lead { color: #374151; font-size: 1.05rem; }
.hint { color: var(--muted); font-size: .85rem; }

.hero { text-align: center; padding: 30px 0 10px; }
.hero h1 { font-size: 2.3rem; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 28px 0; }
.card {
  display: block; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px;
  color: var(--ink); background: var(--bg); transition: box-shadow .15s, transform .15s;
}
.card:hover { text-decoration: none; box-shadow: 0 6px 20px rgba(0,0,0,.08); transform: translateY(-2px); }
.card h2 { margin: 0 0 8px; color: var(--accent); }
.card p { margin: 0; color: #374151; font-size: .93rem; }
.popular ul { columns: 2; gap: 32px; padding-left: 1.2em; }
.popular li { margin: 6px 0; break-inside: avoid; }
@media (max-width: 640px) { .popular ul { columns: 1; } .hero h1 { font-size: 1.7rem; } }

.tool-box { border: 1.5px solid var(--line); border-radius: 14px; padding: 22px; margin: 22px 0; background: var(--soft); }
.drop { border: 2px dashed #c3cbd8; border-radius: 12px; padding: 34px 18px; text-align: center; background: var(--bg); }
.drop.over { border-color: var(--accent); background: #eff4ff; }
.btn {
  display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 9px;
  padding: 10px 20px; font-size: .98rem; cursor: pointer; font-weight: 600;
}
.btn:hover { background: var(--accent-2); text-decoration: none; }
.btn.ghost { background: var(--bg); color: var(--accent); border: 1.5px solid var(--accent); }
.btn.ghost:hover { background: #eff4ff; }

.hidden { display: none !important; }
.preview-row { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 14px; }
.preview-row figure { margin: 0; flex: 1 1 240px; min-width: 200px; }
.preview-row figcaption { font-size: .85rem; color: var(--muted); margin-bottom: 6px; }
.preview-row canvas { max-width: 100%; height: auto; border-radius: 8px; display: block; }
.checker {
  border-radius: 8px; padding: 6px;
  background-image: linear-gradient(45deg,#d8dbe2 25%,transparent 25%), linear-gradient(-45deg,#d8dbe2 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,#d8dbe2 75%), linear-gradient(-45deg,transparent 75%,#d8dbe2 75%);
  background-size: 18px 18px; background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
#status { font-size: .92rem; color: var(--muted); }

.controls { display: flex; gap: 26px; flex-wrap: wrap; margin: 16px 4px 4px; font-size: .95rem; }
.controls input[type=number] { width: 90px; padding: 5px 8px; border: 1px solid var(--line); border-radius: 7px; }
.filelist { list-style: none; padding: 0; margin: 14px 0 0; }
.filelist li {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  background: var(--bg); border: 1px solid var(--line); border-radius: 9px; padding: 9px 14px; margin: 8px 0; font-size: .92rem;
}
.filelist .size { color: var(--muted); }
.filelist .saved { color: var(--good); font-weight: 600; }

.faq details { border-bottom: 1px solid var(--line); padding: 10px 4px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: #374151; }
.related ul { columns: 2; padding-left: 1.2em; }
@media (max-width: 640px) { .related ul { columns: 1; } }

.stage-canvas { max-width: 100%; height: auto; border-radius: 8px; display: block; margin: 6px 0; background: #fff; }
.crop-stage { cursor: crosshair; touch-action: none; }
.controls select { padding: 5px 8px; border: 1px solid var(--line); border-radius: 7px; font-size: .95rem; }
.controls label { display: inline-flex; align-items: center; gap: 6px; }

.site-foot { border-top: 1px solid var(--line); margin-top: 40px; padding: 22px 20px 34px; color: var(--muted); font-size: .88rem; text-align: center; }