:root {
  --brand: #0e9f6e;
  --brand-dark: #057a51;
  --ink: #14201b;
  --muted: #5d6b64;
  --line: #e2e8e4;
  --bg: #f6f9f7;
  --card: #ffffff;
  --radius: 14px;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--brand-dark); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 20px;
  flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; text-decoration: none; }
.top-nav { display: flex; gap: 16px; flex-wrap: wrap; }
.top-nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.top-nav a:hover, .top-nav a[aria-current=page] { color: var(--brand-dark); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 12px 20px 64px; }

h1 { font-size: 2rem; line-height: 1.2; margin: 18px 0 8px; letter-spacing: -0.02em; }
.sub { font-size: 1.08rem; color: var(--muted); margin: 0 0 24px; }

.tool-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 2px rgba(20, 32, 27, 0.04), 0 8px 24px rgba(20, 32, 27, 0.05);
}

.tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.tab {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.tab.active { background: var(--brand); border-color: var(--brand); color: #fff; }

.fld { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }

.row { display: flex; gap: 10px; }
input[type=url], textarea {
  width: 100%;
  font: inherit;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
input[type=url]:focus, textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
textarea { min-height: 180px; resize: vertical; }

button[type=submit] {
  white-space: nowrap;
  font: inherit;
  font-weight: 700;
  border: 0;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  padding: 12px 22px;
  cursor: pointer;
}
button[type=submit]:hover { background: var(--brand-dark); }
button[type=submit]:disabled { opacity: 0.55; cursor: default; }

.options { display: flex; gap: 24px; flex-wrap: wrap; margin: 16px 0 4px; }
.opt-group { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.opt-group > span { font-size: 13px; color: var(--muted); margin-right: 6px; }
.options label { font-size: 14px; display: inline-flex; align-items: center; gap: 5px; cursor: pointer; }

.hint { font-size: 13px; color: var(--muted); margin-top: 12px; }

.status { margin-top: 14px; font-size: 14px; min-height: 1.2em; display: flex; align-items: center; gap: 8px; }
.status.err { color: #b4231d; }
.status.ok { color: var(--brand-dark); }
.spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid var(--line); border-top-color: var(--brand);
  display: inline-block; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.result {
  margin-top: 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 24px rgba(20, 32, 27, 0.05);
}
.result-head h2 { margin: 0 0 4px; font-size: 1.25rem; }
.result-meta { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.summary-body { font-size: 1.04rem; }
.summary-body p:first-child { margin-top: 0; }
.summary-body ul { padding-left: 1.2em; }
.result-actions { display: flex; gap: 14px; align-items: center; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.result-actions .copy {
  font: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--brand); background: #fff; color: var(--brand-dark);
  padding: 8px 16px; border-radius: 8px;
}
.result-actions .copy:hover { background: var(--brand); color: #fff; }
.result-actions .src { font-size: 14px; }

.others { margin: 40px 0 8px; }
.others h2 { font-size: 1.05rem; margin-bottom: 12px; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chips a {
  font-size: 14px; text-decoration: none; color: var(--muted);
  border: 1px solid var(--line); background: #fff; padding: 7px 14px; border-radius: 999px;
}
.chips a:hover, .chips a[aria-current=page] { border-color: var(--brand); color: var(--brand-dark); }

.content { margin-top: 36px; }
.content h2 { font-size: 1.3rem; margin: 32px 0 10px; letter-spacing: -0.01em; }
.content p, .content li { color: #2b3833; }
.content ol, .content ul { padding-left: 1.3em; }

.faq h3 { font-size: 1.05rem; margin: 22px 0 4px; }
.faq p { margin-top: 0; color: #2b3833; }

.site-footer { border-top: 1px solid var(--line); background: #fff; }
.foot-nav {
  max-width: var(--maxw); margin: 0 auto; padding: 24px 20px 8px;
  display: flex; gap: 16px; flex-wrap: wrap;
}
.foot-nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.foot-nav a:hover { color: var(--brand-dark); }
.foot-meta { max-width: var(--maxw); margin: 0 auto; padding: 4px 20px 28px; color: var(--muted); font-size: 13px; }

@media (max-width: 560px) {
  h1 { font-size: 1.6rem; }
  .row { flex-direction: column; }
  button[type=submit] { width: 100%; }
}