/* ===== Design tokens ===== */
:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --panel-2: #f0f3f8;
  --border: #dde3ec;
  --text: #1a2233;
  --muted: #5c6a80;
  --accent: #3b6cf6;
  --accent-hover: #2f59d6;
  --ok: #12924f;
  --err: #d13438;
  --warn: #b26a00;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20,30,50,.06), 0 8px 24px rgba(20,30,50,.06);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
}
:root[data-theme="dark"] {
  --bg: #0f1420;
  --panel: #171d2b;
  --panel-2: #1e2636;
  --border: #2a3346;
  --text: #e6ecf5;
  --muted: #94a2ba;
  --accent: #5b86ff;
  --accent-hover: #7396ff;
  --ok: #34c77b;
  --err: #ff6b6f;
  --warn: #e0a458;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1420; --panel: #171d2b; --panel-2: #1e2636; --border: #2a3346;
    --text: #e6ecf5; --muted: #94a2ba; --accent: #5b86ff; --accent-hover: #7396ff;
    --ok: #34c77b; --err: #ff6b6f; --warn: #e0a458;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Layout ===== */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

header.site {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(160%) blur(10px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
header.site .bar { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 16px; min-height: 66px; padding: 8px 0; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 16px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), #8a5bff);
  display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 800;
}
.brand .logo-img { height: 44px; width: auto; display: block; }
@media (max-width: 460px) { .brand .logo-img { height: 34px; } }
header.site nav { display: flex; flex-wrap: wrap; gap: 2px; margin-left: auto; align-items: center; }
header.site nav a { white-space: nowrap; }
header.site nav a {
  color: var(--muted); font-size: 13.5px; padding: 6px 10px; border-radius: 8px; font-weight: 500;
}
header.site nav a:hover { color: var(--text); background: var(--panel-2); text-decoration: none; }
header.site nav a.active { color: var(--text); background: var(--panel-2); }

/* ===== Dropdown nav ===== */
.dd { position: relative; }
.dd > summary { list-style: none; cursor: pointer; color: var(--muted); font-size: 13.5px; padding: 6px 10px; border-radius: 8px; font-weight: 500; white-space: nowrap; user-select: none; }
.dd > summary::-webkit-details-marker { display: none; }
.dd > summary::after { content: "▾"; font-size: 10px; margin-left: 5px; opacity: .75; }
.dd > summary:hover, .dd[open] > summary, .dd.cur > summary { color: var(--text); background: var(--panel-2); }
.dd .menu { position: absolute; top: 100%; right: 0; margin-top: 6px; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); padding: 6px; min-width: 200px; z-index: 60; display: flex; flex-direction: column; gap: 2px; }
.dd .menu a { display: block; }
@media (max-width: 640px) { .dd .menu { right: auto; left: 0; } }
.theme-btn {
  border: 1px solid var(--border); background: var(--panel); color: var(--muted);
  width: 34px; height: 34px; border-radius: 8px; cursor: pointer; font-size: 15px;
  display: grid; place-items: center; margin-left: 4px;
}
.theme-btn:hover { color: var(--text); }

/* ===== Hero (index) ===== */
.hero { text-align: center; padding: 56px 0 28px; }
.hero h1 { font-size: 34px; margin: 0 0 12px; letter-spacing: -.02em; }
.hero p { color: var(--muted); font-size: 16px; max-width: 620px; margin: 0 auto; }
.badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }
.badge {
  font-size: 12.5px; color: var(--muted); background: var(--panel);
  border: 1px solid var(--border); padding: 5px 12px; border-radius: 999px;
}

/* ===== Category ===== */
.cat-title { font-size: 18px; margin: 30px 0 2px; display: flex; align-items: center; gap: 10px; letter-spacing: -.01em; }
.cat-title .soon { font-size: 11.5px; font-weight: 600; color: var(--muted); background: var(--panel); border: 1px solid var(--border); padding: 2px 9px; border-radius: 999px; }
.cat-title:first-of-type { margin-top: 8px; }
.cat-desc { color: var(--muted); font-size: 13px; margin: 4px 0 0; }

/* ===== Tool grid ===== */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; padding: 16px 0 12px; }
.grid.last { padding-bottom: 40px; }
.card.soon-card { opacity: .6; cursor: default; }
.card.soon-card:hover { transform: none; border-color: var(--border); }
.card {
  display: block; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
  transition: transform .12s ease, border-color .12s ease;
}
.card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.card .ic { font-size: 22px; margin-bottom: 10px; }
.card h3 { margin: 0 0 6px; font-size: 16px; color: var(--text); }
.card p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* ===== Tool page ===== */
.tool-head { padding: 30px 0 10px; }
.tool-head h1 { font-size: 24px; margin: 0 0 6px; letter-spacing: -.01em; }
.tool-head p { color: var(--muted); margin: 0; font-size: 14px; }
.crumbs { font-size: 12.5px; color: var(--muted); margin-bottom: 14px; }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 14px 0; }
.spacer { flex: 1; }
.btn {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 8px 14px; border-radius: 9px; cursor: pointer; font-size: 13.5px; font-weight: 500;
  font-family: var(--sans); display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
.seg button {
  border: 0; background: var(--panel); color: var(--muted); padding: 8px 14px;
  cursor: pointer; font-size: 13.5px; font-family: var(--sans); font-weight: 500;
}
.seg button.on { background: var(--accent); color: #fff; }
.seg button + button { border-left: 1px solid var(--border); }

.io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 760px) { .io { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; min-height: 0; }
.field label { font-size: 12px; color: var(--muted); font-weight: 600; margin-bottom: 6px; text-transform: uppercase; letter-spacing: .04em; }
textarea {
  width: 100%; min-height: 360px; resize: vertical; background: var(--panel);
  color: var(--text); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; font-family: var(--mono); font-size: 13px; line-height: 1.55; tab-size: 2;
}
textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: -1px; border-color: var(--accent); }
textarea[readonly] { background: var(--panel-2); }

.status { margin: 12px 0; min-height: 22px; font-size: 13.5px; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }
.status.muted { color: var(--muted); }

.opts { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 6px 0 2px; font-size: 13px; color: var(--muted); }
.opts label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.opts input[type="number"], .opts input[type="text"], .opts select {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 7px; padding: 4px 8px; font-family: var(--mono); font-size: 12.5px;
}
.opts input[type="text"] { width: 54px; text-align: center; }
.opts input[type="number"] { width: 56px; }

/* ===== SEO content block ===== */
.article { padding: 20px 0 60px; color: var(--muted); font-size: 14px; max-width: 760px; }
.article h2 { color: var(--text); font-size: 18px; margin: 28px 0 10px; }
.article h3 { color: var(--text); font-size: 15px; margin: 20px 0 8px; }
.article code { font-family: var(--mono); background: var(--panel-2); padding: 2px 6px; border-radius: 5px; font-size: 12.5px; color: var(--text); }
.article ul { padding-left: 20px; }
.article li { margin: 4px 0; }

/* ===== FAQ accordion ===== */
.faq { max-width: 760px; margin-top: 8px; }
.faq details { border: 1px solid var(--border); border-radius: 10px; padding: 0 14px; margin-bottom: 8px; background: var(--panel); }
.faq summary { cursor: pointer; padding: 13px 0; font-weight: 600; color: var(--text); font-size: 14px; list-style: none; display: flex; gap: 8px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "＋"; color: var(--accent); font-weight: 700; }
.faq details[open] summary::before { content: "−"; }
.faq details p { margin: 0 0 14px; color: var(--muted); font-size: 13.5px; line-height: 1.7; }

footer.site { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: 13px; }
footer.site .row { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
footer.site a { color: var(--muted); }

/* ===== Toast ===== */
#toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 10px;
  font-size: 13.5px; font-weight: 600; opacity: 0; pointer-events: none; transition: all .22s ease; z-index: 50;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }