:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #16181d;
  --muted: #6b7280;
  --line: #e6e8ee;
  --accent: #e8590c;
  --accent-soft: #fff1e7;
  --ok: #0f9d58;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 18, 27, .06), 0 8px 24px rgba(16, 18, 27, .06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .wrap { display: flex; align-items: center; gap: 18px; height: 60px; }
.logo { font-weight: 800; font-size: 19px; letter-spacing: -.4px; color: var(--text); }
.logo span { color: var(--accent); }
.site-header nav { margin-left: auto; display: flex; gap: 18px; font-size: 14px; }
.site-header nav a { color: var(--muted); }
.site-header nav a:hover { color: var(--accent); text-decoration: none; }

/* hero */
.hero { padding: 46px 0 22px; text-align: center; }
.hero h1 { font-size: 32px; line-height: 1.25; margin: 0 0 12px; letter-spacing: -.8px; }
.hero p { color: var(--muted); margin: 0 auto; max-width: 620px; font-size: 17px; }

/* tool grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; padding: 10px 0 34px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
  display: block;
  color: inherit;
}
.card:hover { transform: translateY(-2px); border-color: #cdcff5; text-decoration: none; }
.card h2 { font-size: 16px; margin: 0 0 6px; }
.card p { margin: 0; font-size: 13.5px; color: var(--muted); }
.card .ico { font-size: 22px; display: block; margin-bottom: 8px; }

/* tool page */
.tool { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin: 28px 0; }
.tool h1 { font-size: 25px; margin: 0 0 6px; letter-spacing: -.5px; }
.tool .sub { color: var(--muted); margin: 0 0 18px; font-size: 15px; }

label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin: 14px 0 6px; }
input[type=text], input[type=number], input[type=email], input[type=password], textarea, select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  background: #fff;
  color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { min-height: 160px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; }
.out { min-height: 90px; padding: 12px; background: #fbfbfd; border: 1px dashed var(--line); border-radius: 10px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; white-space: pre-wrap; word-break: break-all; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row > * { flex: 1 1 160px; }
.range { display: flex; align-items: center; gap: 12px; }
.range input[type=range] { flex: 1; }

button {
  font: inherit; font-weight: 600;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button:hover { filter: brightness(1.06); }
button.ghost { background: #fff; color: var(--accent); }
button.sm { padding: 7px 12px; font-size: 13px; }

.checks { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 10px; font-size: 14px; }
.checks label { display: flex; align-items: center; gap: 6px; margin: 0; font-weight: 500; color: var(--text); }
.checks input { width: auto; }

.msg { margin-top: 12px; font-size: 14px; font-weight: 600; }
.msg.ok { color: var(--ok); }
.msg.err { color: #d93025; }

/* seo copy */
.seo { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; margin-bottom: 30px; }
.seo h2 { font-size: 18px; margin: 22px 0 8px; }
.seo h2:first-child { margin-top: 0; }
.seo p, .seo li { color: #3f4550; font-size: 15px; }
.seo ul { padding-left: 20px; }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: #fff; padding: 26px 0 40px; margin-top: 20px; }
.site-footer h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); margin: 0 0 12px; }
.flinks { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 14px; }
.copy { margin-top: 22px; font-size: 13px; color: var(--muted); }

@media (max-width: 600px) {
  .hero h1 { font-size: 26px; }
  .site-header nav { display: none; }
}