:root {
  --bg: #0f172a;
  --bg2: #1e293b;
  --card: #1e293b;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #ee4d2d;
  --accent2: #f97316;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text); min-height: 100vh;
}
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 1rem;
  padding: .7rem 1.2rem; background: #0b1220; border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.brand { font-weight: 800; font-size: 1.2rem; cursor: pointer; color: var(--accent2); }
.nav { display: flex; gap: .4rem; flex-wrap: wrap; }
.nav button {
  background: transparent; border: 1px solid transparent; color: var(--muted);
  padding: .45rem .8rem; border-radius: .6rem; cursor: pointer; font-size: .9rem;
}
.nav button:hover { color: var(--text); background: var(--bg2); }
.nav button.active { color: #fff; background: var(--accent); border-color: var(--accent); }
main { max-width: 960px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
.page { display: none; }
.page.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }
h2 { margin: .2rem 0 .3rem; }
.desc { color: var(--muted); margin-top: 0; }
.hero { text-align: center; margin: 1.5rem 0 2rem; }
.hero h1 { font-size: 2rem; margin-bottom: .5rem; }
.hero p { color: var(--muted); max-width: 640px; margin: 0 auto; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: .9rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 1rem;
  padding: 1.2rem 1rem; cursor: pointer; color: var(--text); text-align: left;
  display: flex; flex-direction: column; gap: .3rem; transition: transform .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card .ico { font-size: 1.8rem; }
.card small { color: var(--muted); }
.form {
  background: var(--card); border: 1px solid var(--line); border-radius: 1rem;
  padding: 1.2rem; display: grid; gap: .9rem; max-width: 560px;
}
.form label { display: grid; gap: .35rem; font-size: .9rem; color: var(--muted); }
.form input, .form textarea, .form select {
  background: #0b1220; border: 1px solid var(--line); color: var(--text);
  border-radius: .6rem; padding: .7rem .8rem; font-size: 1rem; width: 100%;
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.form input[type="file"] { padding: .5rem; }
.btn {
  background: var(--accent); color: #fff; border: none; border-radius: .7rem;
  padding: .8rem; font-size: 1rem; font-weight: 700; cursor: pointer;
}
.btn:hover { background: var(--accent2); }
.result {
  margin-top: 1.2rem; background: var(--card); border: 1px solid var(--line);
  border-radius: 1rem; padding: 1.2rem; max-width: 560px;
}
.result .placeholder { color: var(--muted); }
.kv { display: flex; justify-content: space-between; padding: .45rem 0; border-bottom: 1px dashed var(--line); }
.kv:last-child { border-bottom: none; }
.kv b { font-variant-numeric: tabular-nums; }
.big { font-size: 1.9rem; font-weight: 800; color: var(--accent2); }
.badge { display: inline-block; padding: .25rem .7rem; border-radius: 999px; font-size: .85rem; font-weight: 700; }
.badge.ok { background: rgba(34,197,94,.15); color: var(--green); }
.badge.warn { background: rgba(234,179,8,.15); color: var(--yellow); }
.badge.bad { background: rgba(239,68,68,.15); color: var(--red); }
.badge.info { background: rgba(59,130,246,.15); color: #60a5fa; }
.score { font-weight: 800; padding: .2rem .6rem; border-radius: .5rem; }
.score.hi { background: rgba(34,197,94,.2); color: var(--green); }
.score.mid { background: rgba(234,179,8,.2); color: var(--yellow); }
.score.lo { background: rgba(148,163,184,.2); color: var(--muted); }
.table-wrap { overflow-x: auto; margin-top: 1rem; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; background: var(--card); border-radius: 1rem; overflow: hidden; }
th, td { padding: .6rem .7rem; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { background: #0b1220; color: var(--muted); cursor: pointer; user-select: none; }
th:hover { color: var(--text); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.note { color: var(--muted); font-size: .85rem; margin-top: 1.5rem; }
code { background: #0b1220; padding: .15rem .4rem; border-radius: .3rem; font-size: .85em; }
footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 2rem 1rem; border-top: 1px solid var(--line); }
@media (max-width: 640px) {
  .hero h1 { font-size: 1.5rem; }
  .nav button { padding: .4rem .6rem; font-size: .8rem; }
}