/* dsopt — HandyUtils. Navy ground, blue accent, colourful support cast. */

:root {
  --bg: #070c18;
  --bg-2: #0b1220;
  --panel: #101a2e;
  --panel-2: #16233c;
  --line: #1e2f4d;
  --text: #e6eeff;
  --muted: #93a4c4;
  --dim: #64748b;

  --blue: #3b82f6;
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --emerald: #10b981;
  --amber: #f59e0b;
  --rose: #f43f5e;

  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 600px at 12% -10%, rgba(59, 130, 246, 0.22), transparent 60%),
    radial-gradient(900px 500px at 92% 4%, rgba(139, 92, 246, 0.16), transparent 60%),
    radial-gradient(700px 500px at 60% 100%, rgba(34, 211, 238, 0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

code, kbd, pre { font-family: var(--mono); }

code {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.22);
  border-radius: 6px;
  padding: 0.08em 0.4em;
  font-size: 0.9em;
  color: #cfe0ff;
}

kbd {
  display: inline-block;
  min-width: 1.9em;
  text-align: center;
  padding: 0.15em 0.5em;
  border-radius: 7px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  color: var(--text);
  font-size: 0.82em;
  font-weight: 600;
}

/* ---------------------------------------------------------------- top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 4vw, 3rem);
  background: rgba(7, 12, 24, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 0.6rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.brand-name {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.1rem;
  background: linear-gradient(90deg, #93c5fd, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.topnav { display: flex; align-items: center; gap: clamp(0.6rem, 2vw, 1.4rem); }
.topnav a { color: var(--muted); font-size: 0.9rem; }
.topnav a:hover { color: var(--text); text-decoration: none; }
.topnav .ghost {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  color: var(--text);
  background: var(--panel);
}
.topnav .ghost:hover { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15); }

@media (max-width: 860px) {
  .topnav a:not(.ghost) { display: none; }
}

/* ------------------------------------------------------------------- hero */

main { max-width: 1140px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 3rem) 4rem; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.eyebrow {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.grad {
  background: linear-gradient(100deg, var(--blue), var(--cyan) 45%, var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede { color: var(--muted); font-size: 1.05rem; max-width: 56ch; }
.lede strong { color: var(--text); }

.install-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.4rem 0 1.2rem;
  padding: 0.6rem 0.75rem 0.6rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  box-shadow: 0 18px 40px -28px rgba(59, 130, 246, 0.9);
}
.install-inline code { background: none; border: 0; padding: 0; color: #cfe0ff; font-size: 0.95rem; }

.copy {
  cursor: pointer;
  border: 1px solid rgba(59, 130, 246, 0.4);
  background: rgba(59, 130, 246, 0.14);
  color: #bfdbfe;
  border-radius: 8px;
  padding: 0.3rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  transition: all 0.15s ease;
}
.copy:hover { background: rgba(59, 130, 246, 0.28); border-color: var(--blue); }
.copy.done { background: rgba(16, 185, 129, 0.2); border-color: var(--emerald); color: #a7f3d0; }

.badges { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.badge {
  font-family: var(--mono);
  font-size: 0.74rem;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  opacity: 0.95;
}
.badge.blue { color: #93c5fd; background: rgba(59, 130, 246, 0.12); }
.badge.cyan { color: #a5f3fc; background: rgba(34, 211, 238, 0.12); }
.badge.violet { color: #ddd6fe; background: rgba(139, 92, 246, 0.14); }
.badge.amber { color: #fde68a; background: rgba(245, 158, 11, 0.12); }

/* ------------------------------------------------------------ disk visual */

.hero-visual { display: flex; flex-direction: column; align-items: center; gap: 1rem; }

.disk { position: relative; width: min(300px, 68vw); aspect-ratio: 1; display: grid; place-items: center; }
.disk .platter {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(59, 130, 246, 0.35);
  animation: spin 18s linear infinite;
}
.disk .p2 { inset: 11%; border-color: rgba(34, 211, 238, 0.45); animation-duration: 13s; animation-direction: reverse; }
.disk .p3 { inset: 22%; border-color: rgba(139, 92, 246, 0.45); animation-duration: 9s; }
.disk .p1::after,
.disk .p2::after {
  content: "";
  position: absolute;
  top: -5px; left: 50%;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 16px var(--cyan);
}
.disk .p2::after { background: var(--violet); box-shadow: 0 0 16px var(--violet); }
.disk .spindle {
  width: 34%; height: 34%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #1e3a8a, #0b1220 70%);
  border: 1px solid rgba(59, 130, 246, 0.6);
  box-shadow: inset 0 0 28px rgba(59, 130, 246, 0.35), 0 0 50px -10px rgba(59, 130, 246, 0.7);
}
.disk .arm {
  position: absolute;
  bottom: 6%;
  left: 50%;
  width: 3px;
  height: 42%;
  background: linear-gradient(180deg, var(--cyan), transparent);
  transform-origin: bottom center;
  animation: seek 7s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes seek { 0%,100% { transform: rotate(-26deg); } 50% { transform: rotate(24deg); } }
@media (prefers-reduced-motion: reduce) {
  .disk .platter, .disk .arm { animation: none; }
}

.visual-caption { margin: 0; font-family: var(--mono); font-size: 0.78rem; color: var(--dim); }

/* ------------------------------------------------------------------ strip */

.strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat { background: var(--bg-2); padding: 1.1rem 1rem; display: flex; flex-direction: column; gap: 0.15rem; }
.stat-num {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { font-size: 0.78rem; color: var(--muted); }
@media (max-width: 700px) { .strip { grid-template-columns: repeat(2, 1fr); } }

/* ---------------------------------------------------------------- sections */

.section { padding: clamp(2.5rem, 6vw, 4rem) 0 0; }
.section h2 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.6rem;
  font-size: clamp(1.4rem, 3.2vw, 1.85rem);
  letter-spacing: -0.01em;
}
.accent-rule {
  width: 4px;
  height: 1.5em;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--cyan), var(--blue));
}
.section-lede { color: var(--muted); margin: 0 0 1.4rem; }

.cards { display: grid; gap: 1rem; margin-top: 1.2rem; }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cards.three { grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); }
@media (max-width: 720px) { .cards.two { grid-template-columns: 1fr; } }

.card {
  position: relative;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem;
  overflow: hidden;
  transition: transform 0.16s ease, border-color 0.16s ease;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent, var(--blue));
}
.card:hover { transform: translateY(-3px); border-color: var(--accent, var(--blue)); }
.card h3 { margin: 0.2rem 0 0.5rem; font-size: 1.03rem; }
.card p { margin: 0 0 0.6rem; color: var(--muted); font-size: 0.94rem; }
.card-meta { font-family: var(--mono); font-size: 0.76rem; color: var(--dim); }
.card-icon { font-size: 1.4rem; color: var(--accent, var(--blue)); line-height: 1; }
.card-link { font-size: 0.88rem; }

.c-blue { --accent: var(--blue); }
.c-cyan { --accent: var(--cyan); }
.c-violet { --accent: var(--violet); }
.c-emerald { --accent: var(--emerald); }
.c-amber { --accent: var(--amber); }
.c-rose { --accent: var(--rose); }

.note {
  margin: 1.2rem 0 0;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--blue);
  background: rgba(59, 130, 246, 0.07);
  border-radius: 0 10px 10px 0;
  color: var(--muted);
  font-size: 0.93rem;
}

/* -------------------------------------------------------------- codeblock */

.codeblock {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #060a14;
  overflow: hidden;
}
.codeblock-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.9rem;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--dim);
}
.codeblock pre { margin: 0; padding: 1.1rem 1.2rem; overflow-x: auto; font-size: 0.87rem; line-height: 1.75; }
.codeblock code { background: none; border: 0; padding: 0; color: #dbeafe; }
.codeblock .c { color: var(--dim); }

.mini-code { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.7rem; flex-wrap: wrap; }
.mini-code code { font-size: 0.82rem; }

/* ----------------------------------------------------------------- tables */

.table-wrap { margin-top: 1.2rem; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
thead th {
  text-align: left;
  padding: 0.7rem 1rem;
  background: var(--panel);
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
tbody td { padding: 0.65rem 1rem; border-top: 1px solid var(--line); color: var(--muted); }
tbody tr:hover td { background: rgba(59, 130, 246, 0.05); }

/* ------------------------------------------------------------------- keys */

.keys { display: grid; gap: 0.6rem; margin-top: 1.2rem; }
.keyrow {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-2);
  font-size: 0.92rem;
  color: var(--muted);
  flex-wrap: wrap;
}
.keyrow kbd { color: var(--text); }

/* ----------------------------------------------------------------- safety */

.safety p { color: var(--muted); }
.checklist { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: 0.5rem; }
.checklist li {
  position: relative;
  padding: 0.55rem 0.9rem 0.55rem 2.2rem;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0.85rem;
  color: var(--emerald);
  font-weight: 700;
}

/* -------------------------------------------------------------- steps/docs */

.steps { list-style: none; counter-reset: step; padding: 0; margin: 1.2rem 0 1.4rem; display: grid; gap: 0.8rem; }
.step {
  position: relative;
  counter-increment: step;
  padding: 1rem 1.15rem 1rem 3.4rem;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.step::before {
  content: counter(step);
  position: absolute;
  left: 1.05rem;
  top: 1rem;
  width: 1.6rem;
  height: 1.6rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: #04121f;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}
.step h3 { margin: 0 0 0.25rem; font-size: 0.98rem; }
.step p { margin: 0; color: var(--muted); font-size: 0.93rem; }

.subhead {
  margin: 2rem 0 0.5rem;
  font-size: 1.06rem;
  letter-spacing: -0.005em;
  padding-left: 0.7rem;
  border-left: 3px solid var(--violet);
}

.spec-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 0.9rem; margin-top: 0.9rem; }
.spec {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 0.95rem 1rem;
}
.spec-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}
.spec code { display: inline-block; font-size: 0.82rem; margin-bottom: 0.45rem; }
.spec p { margin: 0; color: var(--muted); font-size: 0.88rem; }

.bullets { margin: 0.8rem 0 0; padding-left: 1.1rem; color: var(--muted); font-size: 0.93rem; display: grid; gap: 0.5rem; }
.bullets strong { color: var(--text); }

.faq { display: grid; gap: 0.6rem; margin-top: 0.9rem; }
.faq details {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 0.75rem 1rem;
}
.faq details[open] { border-color: rgba(59, 130, 246, 0.45); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--text);
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--cyan); font-family: var(--mono); }
.faq details[open] summary::before { content: "– "; }
.faq p { margin: 0.6rem 0 0; color: var(--muted); font-size: 0.91rem; }

/* ----------------------------------------------------------------- footer */

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
  align-items: flex-start;
  max-width: 1140px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 3rem) 3rem;
  border-top: 1px solid var(--line);
}
.footer-brand {
  margin: 0;
  font-family: var(--mono);
  font-weight: 700;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.footer-note { margin: 0.3rem 0 0; color: var(--dim); font-size: 0.86rem; max-width: 46ch; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.1rem; font-size: 0.88rem; }