:root {
  --ink: #22303c;
  --muted: #5b6b7a;
  --brand: #2e7d5b;
  --brand-dark: #205c42;
  --bg: #f7f9f8;
  --card: #ffffff;
  --border: #dde5e1;
  --max: 980px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  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); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

header.site { background: var(--card); border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; gap: 8px; }
.logo { font-weight: 800; font-size: 1.25rem; color: var(--brand-dark); text-decoration: none; }
.logo span { color: var(--brand); }
nav.main a { margin-left: 18px; text-decoration: none; color: var(--muted); font-weight: 600; font-size: .95rem; }
nav.main a:hover { color: var(--brand-dark); }

main { padding: 32px 0 48px; }

/* --- homepage --- */
.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 36px; align-items: center; padding: 30px 0 10px; }
.hero h1 { font-size: 2.35rem; line-height: 1.15; margin-bottom: 16px; }
.hero .lede { font-size: 1.06rem; margin-bottom: 24px; }
.hero-art svg { width: 100%; height: auto; display: block; }
@media (max-width: 800px) { .hero { grid-template-columns: 1fr; padding-top: 10px; } .hero h1 { font-size: 1.85rem; } .hero-art { max-width: 420px; margin: 0 auto; } }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 22px; border-radius: 10px; font-weight: 700; text-decoration: none; background: var(--brand); color: #fff; }
.btn:hover { background: var(--brand-dark); }
.btn.ghost { background: transparent; color: var(--brand-dark); border: 2px solid var(--brand); padding: 10px 20px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin: 34px 0 10px; }
.feat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; font-size: .93rem; color: var(--muted); }
.feat b { display: block; color: var(--ink); margin-bottom: 2px; font-size: 1rem; }
.home-h2 { font-size: 1.35rem; margin: 38px 0 4px; }
.card .thumb { background: #eef2ef; border-radius: 8px; overflow: hidden; margin-bottom: 12px; }
.card .thumb svg { display: block; width: 100%; height: auto; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0 8px; }
.chip { display: inline-block; padding: 9px 16px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); text-decoration: none; color: var(--ink); font-size: .93rem; font-weight: 600; }
.chip:hover { border-color: var(--brand); color: var(--brand-dark); }
h1 { font-size: 1.7rem; line-height: 1.25; margin-bottom: 10px; }
.lede { color: var(--muted); max-width: 46em; margin-bottom: 24px; }

.tool { display: grid; grid-template-columns: 300px 1fr; gap: 24px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; margin-bottom: 36px; }
@media (max-width: 760px) { .tool { grid-template-columns: 1fr; } }
.panel h2 { font-size: 1.05rem; margin-bottom: 12px; }
.ctl { display: block; margin-bottom: 12px; }
.ctl span { display: block; font-size: .85rem; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.ctl select { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: #fff; font-size: .95rem; color: var(--ink); }
button.dl { width: 100%; margin-top: 8px; padding: 13px; font-size: 1.05rem; font-weight: 700; color: #fff; background: var(--brand); border: 0; border-radius: 10px; cursor: pointer; }
button.dl:hover { background: var(--brand-dark); }
.hint { font-size: .8rem; color: var(--muted); margin-top: 10px; }
#preview { background: #eceff1; border-radius: 8px; padding: 16px; display: flex; align-items: center; justify-content: center; }
#preview svg { max-width: 100%; height: auto; max-height: 560px; box-shadow: 0 2px 12px rgba(0,0,0,.15); }

section.copy { max-width: 46em; margin-bottom: 32px; }
section.copy h2 { font-size: 1.25rem; margin: 26px 0 8px; }
section.copy p { margin-bottom: 12px; }
section.copy ul { margin: 0 0 12px 22px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin: 20px 0 32px; }
.card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; text-decoration: none; color: var(--ink); }
.card:hover { border-color: var(--brand); }
.card b { display: block; color: var(--brand-dark); margin-bottom: 4px; }
.card small { color: var(--muted); }

.linklist { columns: 2; gap: 32px; margin: 12px 0 24px; }
@media (max-width: 600px) { .linklist { columns: 1; } }
.linklist a { display: block; padding: 3px 0; text-decoration: none; }
.linklist a:hover { text-decoration: underline; }

footer.site { border-top: 1px solid var(--border); background: var(--card); padding: 24px 0; color: var(--muted); font-size: .9rem; }
footer.site a { color: var(--muted); margin-right: 16px; }