:root {
  --bg: #0b0f14;
  --panel: #111820;
  --panel-2: #16202b;
  --text: #e6edf3;
  --muted: #8b9bb0;
  --line: #22303e;
  --accent: #4cc2ff;
  --accent-2: #7ef0c0;
  --danger: #ff6b6b;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #12324a 0%, transparent 60%), var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(1080px, 92vw); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(11, 15, 20, 0.72);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: 0.2px; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121b;
  font-size: 17px;
}

.brand-name { font-size: 18px; }

.nav { display: flex; gap: 22px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--text); }

.hero { padding: 86px 0 54px; }

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12.5px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

h1 { margin: 0; font-size: clamp(34px, 6vw, 62px); line-height: 1.06; letter-spacing: -1.4px; }
.accent { color: var(--accent); }

.lead { max-width: 620px; margin: 22px 0 30px; color: var(--muted); font-size: 17px; }

.cta {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 10px;
  background: var(--accent);
  color: #04121b;
  text-decoration: none;
  font-weight: 650;
  font-size: 15px;
}
.cta:hover { filter: brightness(1.08); }

.tools { padding: 26px 0 40px; }

.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }

.tab {
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
.tab:hover { color: var(--text); border-color: #31465a; }
.tab.active { background: var(--panel-2); color: var(--text); border-color: #37536b; }

.panel {
  display: none;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), #0d1319);
}

.panel.active { display: block; }

.panel h2 { margin: 0 0 6px; font-size: 20px; }
.hint { margin: 0 0 16px; color: var(--muted); font-size: 14px; }

textarea, input[type="text"] {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0a1016;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13.5px;
  resize: vertical;
}

textarea { min-height: 150px; }
input[type="text"] { min-height: 46px; }

textarea:focus, input[type="text"]:focus { outline: none; border-color: #3a5a74; }

.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row input { flex: 1 1 320px; }

.actions { display: flex; flex-wrap: wrap; gap: 9px; margin: 13px 0; }

.btn {
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: var(--accent);
  color: #04121b;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn.ghost:hover { border-color: #37536b; }

.output {
  margin: 0;
  padding: 14px;
  min-height: 58px;
  max-height: 340px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #070c11;
  color: var(--accent-2);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
}

.output.error { color: var(--danger); }

.features { padding: 30px 0 70px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.features article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.features h3 { margin: 0 0 8px; font-size: 16px; }
.features p { margin: 0; color: var(--muted); font-size: 14px; }

.site-footer { border-top: 1px solid var(--line); padding: 26px 0; color: var(--muted); font-size: 14px; }
.footer-inner { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }
.dot { opacity: 0.6; }

.doc { padding: 60px 0 80px; max-width: 760px; }
.doc h1 { font-size: clamp(30px, 5vw, 44px); }
.doc h2 { margin-top: 34px; font-size: 20px; }
.doc p, .doc li { color: #c3d0dd; }
.doc a { color: var(--accent); }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .nav { gap: 16px; }
  .hero { padding: 56px 0 36px; }
  .panel { padding: 20px; }
}