:root {
  color-scheme: dark;
  --bg-0: #0a0b10;
  --bg-1: #11131c;
  --bg-2: #171a26;
  --bg-3: #1f2333;
  --fg-0: #e9edf6;
  --fg-1: #afb6c7;
  --fg-2: #6b7389;
  --accent: #7b5cff;
  --accent-hot: #a083ff;
  --danger: #ff4d6d;
  --ok: #35d58b;
  --warn: #ffb857;
  --border: #262a3b;
  --radius: 10px;
  --fast: 160ms;
  --med: 220ms;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 800px at 15% -10%, #16182a 0%, #0a0b10 60%);
  color: var(--fg-0);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}
a { color: var(--accent-hot); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1240px; margin: 0 auto; padding: 24px; }

.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 24px;
  background: linear-gradient(180deg, rgba(23,26,38,0.95), rgba(17,19,28,0.95));
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(6px);
}
.topbar .brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); letter-spacing: 2px; font-weight: 700; color: var(--fg-0);
}
.topbar .brand span.pulse {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 12px var(--accent);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1); }
}
.topbar nav a {
  color: var(--fg-1); padding: 6px 10px; border-radius: 8px;
  transition: background var(--fast), color var(--fast);
}
.topbar nav a.active, .topbar nav a:hover { background: var(--bg-3); color: var(--fg-0); text-decoration: none; }
.topbar .spacer { flex: 1; }
.topbar .who { color: var(--fg-2); font-family: var(--font-mono); }

.card {
  background: linear-gradient(180deg, rgba(31,35,51,0.7), rgba(23,26,38,0.7));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 10px 0; font-size: 14px; letter-spacing: 1.4px;
  font-family: var(--font-mono); color: var(--fg-1); text-transform: uppercase; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
@media (max-width: 820px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.kv { display: grid; grid-template-columns: 160px 1fr; gap: 6px 12px; font-family: var(--font-mono); font-size: 13px; }
.kv dt { color: var(--fg-2); }
.kv dd { margin: 0; color: var(--fg-0); word-break: break-all; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-3); color: var(--fg-0); cursor: pointer;
  font-family: var(--font-mono); font-size: 13px;
  transition: transform var(--fast) ease, background var(--fast), border-color var(--fast);
}
.btn:hover { background: #262a3f; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: linear-gradient(180deg, #6b4bff, #553dcc); border-color: #4a35b4; }
.btn.primary:hover { background: linear-gradient(180deg, #7a5bff, #5e45d6); }
.btn.danger { background: #3a1f28; border-color: #532334; color: #ffbac7; }
.btn.danger:hover { background: #4c2535; }
.btn.ghost { background: transparent; }

input, textarea, select {
  background: var(--bg-1); color: var(--fg-0);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; font-family: var(--font-mono); font-size: 13px;
  width: 100%;
  transition: border-color var(--fast), background var(--fast);
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); background: #141627; }

label { display: block; margin: 6px 0 4px; color: var(--fg-1); font-size: 12px; font-family: var(--font-mono); letter-spacing: 0.5px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 1px;
  border: 1px solid var(--border); color: var(--fg-1); background: var(--bg-2);
}
.badge.ok { color: var(--ok); border-color: #1f4f3b; }
.badge.err { color: var(--danger); border-color: #5a2334; }
.badge.warn { color: var(--warn); border-color: #4f3922; }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 10px;
  font-family: var(--font-mono); font-size: 13px; border: 1px solid var(--border); }
.alert.err { color: #ffbac7; background: #2b1821; border-color: #4b2131; }

.remember-row { display: flex; align-items: center; gap: 10px; margin: 14px 0 2px 0;
  font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-1); cursor: pointer;
  user-select: none; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg-2); transition: background var(--fast), border-color var(--fast); }
.remember-row:hover { background: var(--bg-3); border-color: var(--accent); }
.remember-row .remember-cb { width: 16px; height: 16px; accent-color: var(--accent);
  margin: 0; cursor: pointer; }
.alert.ok  { color: #a9f0c7; background: #142419; border-color: #22493a; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--border);
  text-align: left; font-family: var(--font-mono); font-size: 13px; }
th { color: var(--fg-2); font-weight: 500; text-transform: uppercase; letter-spacing: 1px; font-size: 11px; }
tr:hover td { background: #171a26; }

pre.code, textarea.code { background: #0d0f18; border: 1px solid var(--border);
  padding: 10px 12px; border-radius: 8px; overflow: auto; min-height: 200px;
  font-family: var(--font-mono); font-size: 12.5px; color: #d7dcea; }
textarea.code { width: 100%; min-height: 420px; resize: vertical; }

.lua-ed { display: flex; flex-direction: column; border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden; height: 560px; background: #0d0f18; }
.lua-ed .lua-search { display: flex; align-items: center; gap: 6px;
  padding: 6px 8px; background: #11131c; border-bottom: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 12px; }
.lua-ed .lua-search input.lu-q {
  flex: 1; background: #0b0d16; color: var(--fg-0); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 8px; font-family: var(--font-mono); font-size: 12.5px;
}
.lua-ed .lua-search input.lu-q:focus { outline: none; border-color: var(--accent); }
.lua-ed .lua-search .lu-info { color: var(--fg-2); min-width: 48px; text-align: center; }
.lua-ed .lua-search button { background: var(--bg-2); color: var(--fg-0);
  border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px; cursor: pointer; }
.lua-ed .lua-search button:hover { background: var(--bg-3); }

.lua-ed .lua-body { flex: 1; display: grid; grid-template-columns: 56px 1fr;
  min-height: 0; overflow: hidden; }
.lua-ed .lua-gutter { background: #0b0d16; color: var(--fg-2);
  padding: 10px 0; overflow: hidden; user-select: none;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.5;
  border-right: 1px solid var(--border); }
.lua-ed .lu-ln { padding: 0 10px 0 6px; text-align: right; cursor: pointer; color: var(--fg-2); }
.lua-ed .lu-ln:hover { color: var(--fg-0); background: #11131c; }
.lua-ed .lu-ln-active { color: var(--accent-hot); background: #171a26; font-weight: 600; }

.lua-ed .lua-stage { position: relative; overflow: hidden; }
.lua-ed .lua-hl, .lua-ed .lua-ta {
  position: absolute; inset: 0; margin: 0; padding: 10px 12px;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.5;
  white-space: pre; overflow: auto;
}
.lua-ed .lua-hl { color: #d7dcea; pointer-events: none; }
.lua-ed .lua-ta { background: transparent; color: transparent; caret-color: #e9edf6;
  border: 0; outline: 0; resize: none; tab-size: 4; }
.lua-ed .lua-ta::selection { background: #3a3f66; color: transparent; }

/* Lua palette - distinct per token kind */
.lua-ed .lu-k   { color: #c8a2ff; font-weight: 600; }      /* keyword */
.lua-ed .lu-b   { color: #7fd1ff; }                        /* builtin */
.lua-ed .lu-fn  { color: #ffd27a; }                        /* function call */
.lua-ed .lu-mem { color: #8ee6c0; }                        /* .member / :method */
.lua-ed .lu-id  { color: #e9edf6; }                        /* identifier */
.lua-ed .lu-s   { color: #a9f0c7; }                        /* string */
.lua-ed .lu-n   { color: #ffb857; }                        /* number */
.lua-ed .lu-c   { color: #6b7389; font-style: italic; }    /* comment */
.lua-ed .lu-op  { color: #ff9eb8; }                        /* operator */
.lua-ed .lu-w   { color: inherit; }
.lua-ed .lu-x   { color: #ff4d6d; }
.lua-ed mark.lu-match { background: #4a3b0a; color: #ffecb3; border-radius: 2px; }

.diff { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 12.5px; }
.diff td { padding: 2px 8px; border: none; vertical-align: top; white-space: pre-wrap; word-break: break-all; }
.diff .ln { color: var(--fg-2); text-align: right; width: 44px; user-select: none; }
.diff tr.eq td { background: transparent; color: var(--fg-1); }
.diff tr.add td { background: #0e2416; color: #a9f0c7; }
.diff tr.del td { background: #2b1821; color: #ffbac7; }
.diff tr.ch td.old { background: #2b1821; color: #ffbac7; }
.diff tr.ch td.new { background: #0e2416; color: #a9f0c7; }

.steps { display: flex; gap: 8px; margin-bottom: 12px; font-family: var(--font-mono); font-size: 12px; }
.steps .step { padding: 4px 10px; border-radius: 999px; background: var(--bg-2); color: var(--fg-2); }
.steps .step.active { background: var(--accent); color: #fff; }

.toast-wrap { position: fixed; bottom: 20px; right: 20px; z-index: 50; display: flex; flex-direction: column; gap: 10px; }
.toast { padding: 10px 14px; border-radius: 8px; background: var(--bg-3); border: 1px solid var(--border);
  color: var(--fg-0); font-family: var(--font-mono); font-size: 12.5px;
  opacity: 0; transform: translateY(10px); transition: opacity var(--med), transform var(--med); }
.toast.show { opacity: 1; transform: translateY(0); }

.scroller { max-height: 60vh; overflow: auto; }
.scroller::-webkit-scrollbar { width: 10px; height: 10px; }
.scroller::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}