/* ============================================================
   Compressor Compass — /tools  "THE PANEL" Instrument Deck
   Standalone stylesheet (tools.html only). No build step.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

:root {
  color-scheme: dark;

  /* machined-steel cabinet */
  --bg:#050A12;
  --steel-900:#0C1826;
  --steel-800:#14283C;
  --bezel:#2A4258;
  --bezel-hi:#3E6483;

  /* readouts */
  --text:#EAF3FB;
  --muted:#8FA9BE;
  --orange:#FF7A1A;
  --orange-soft:rgba(255,122,26,.14);
  --cyan:#38E0D6;
  --cyan-soft:rgba(56,224,214,.12);
  --redline:#FF3B30;
  --stage:#F2F7FB;
  --focus:#FF7A1A;

  --font-display:'Saira Condensed', ui-sans-serif, system-ui, sans-serif;
  --font-body:'Archivo', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:'Spline Sans Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --rail-h:58px;
  --maxw:1120px;
}

html { scroll-behavior:smooth; }

body {
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  min-height:100vh;
  background:
    radial-gradient(120% 70% at 50% -8%, var(--cyan-soft), transparent 60%),
    linear-gradient(160deg, #070E18 0%, #050A12 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

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

/* faint grain overlay to kill banding */
.cc-grain {
  position:fixed; inset:0; z-index:0; pointer-events:none; opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
}

.sr-only {
  position:absolute; left:-10000px; width:1px; height:1px; overflow:hidden;
}

/* mono label utility */
.eyebrow, .cc-readout, .cc-mono {
  font-family:var(--font-mono);
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:.72rem;
  font-variant-numeric:tabular-nums;
}
.eyebrow { color:var(--cyan); font-weight:600; margin:0; }

/* ----------------------------------------------------------- */
/* page column + edge rulers                                   */
/* ----------------------------------------------------------- */
.page {
  position:relative; z-index:1;
  width:min(var(--maxw), calc(100% - 32px));
  margin:0 auto;
  padding:0 0 64px;
}
.page::before, .page::after {
  content:""; position:absolute; top:8px; bottom:24px; width:2px;
  background:repeating-linear-gradient(180deg, var(--cyan) 0 6px, transparent 6px 40px);
  opacity:.22; pointer-events:none;
}
.page::before { left:-22px; }
.page::after  { right:-22px; }

/* ----------------------------------------------------------- */
/* top rail nav                                                */
/* ----------------------------------------------------------- */
.nav {
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:18px 0 16px;
  border-bottom:1px solid var(--bezel);
  box-shadow:inset 0 -1px 0 rgba(255,255,255,.04);
}
.brand { display:flex; align-items:center; gap:12px; color:var(--text); font-weight:800; letter-spacing:.01em; }
.brand img { width:40px; height:40px; border-radius:50%; border:1px solid var(--bezel-hi); }
.brand span { font-family:var(--font-display); font-weight:700; font-size:1.18rem; letter-spacing:.02em; }
.nav-links { display:flex; align-items:center; gap:20px; flex-wrap:wrap; justify-content:flex-end; }
.nav-links a {
  font-family:var(--font-mono); font-size:.74rem; letter-spacing:.12em;
  text-transform:uppercase; color:var(--muted);
}
.nav-links a:hover { color:var(--cyan); }

/* ----------------------------------------------------------- */
/* sticky category selector (rotary segments)                  */
/* ----------------------------------------------------------- */
.cc-selector {
  position:sticky; top:0; z-index:20;
  background:rgba(10,20,33,.88);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--bezel);
  border-radius:0 0 10px 10px;
}
/* near-opaque fallback where backdrop blur is unavailable */
@supports not ((backdrop-filter:blur(10px)) or (-webkit-backdrop-filter:blur(10px))) {
  .cc-selector { background:rgb(10,20,33); }
}
.cc-selector__track {
  display:flex; gap:2px; width:100%;
  overflow-x:auto; scrollbar-width:none;
}
.cc-selector__track::-webkit-scrollbar { display:none; }
.cc-seg {
  flex:1 0 auto; min-width:0;
  display:flex; flex-direction:column; gap:3px;
  padding:11px 16px;
  border-bottom:2px solid transparent;
  color:var(--muted);
  font-family:var(--font-mono); text-transform:uppercase;
  letter-spacing:.13em; font-size:.72rem; font-weight:500;
  white-space:nowrap; transition:color .18s ease, border-color .2s ease;
}
.cc-seg__count { color:var(--muted); font-size:.66rem; letter-spacing:.18em; }
.cc-seg:hover { color:var(--text); }
.cc-seg:focus-visible { outline:2px solid var(--focus); outline-offset:-2px; color:var(--text); border-radius:4px; }
.cc-seg.is-active { color:var(--text); border-bottom-color:var(--orange); font-weight:600; }
.cc-seg.is-active .cc-seg__count { color:var(--orange); }

/* ----------------------------------------------------------- */
/* hero manifold                                               */
/* ----------------------------------------------------------- */
.cc-hero { padding-top:64px; margin-bottom:18px; }
.cc-hero__manifold {
  display:grid; grid-template-columns:1.2fr .8fr; gap:48px; align-items:center;
}
.cc-hero__copy h1 {
  font-family:var(--font-display); font-weight:800;
  font-size:clamp(2.8rem, 7vw, 5.6rem); line-height:.92; letter-spacing:-.01em;
  margin:.18em 0 .1em; max-width:11ch;
}
.lede { color:var(--muted); font-size:clamp(1.05rem, 1.7vw, 1.25rem); line-height:1.6; max-width:46ch; margin:18px 0 22px; }

/* chip */
.cc-chip {
  display:inline-flex; align-items:center; gap:9px;
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.13em; text-transform:uppercase; font-weight:600;
  color:var(--cyan); background:var(--cyan-soft);
  border:1px solid rgba(56,224,214,.32); border-radius:999px;
  padding:8px 14px;
}
.cc-chip::before { content:""; width:8px; height:8px; border-radius:50%; background:var(--cyan); box-shadow:0 0 8px var(--cyan); }

/* dimension line (drafting measure) */
.cc-dimline { display:flex; align-items:center; gap:14px; margin:6px 0 4px; max-width:340px; }
.cc-dimline__rule { flex:1; height:1px; background:var(--bezel-hi); position:relative; }
.cc-dimline__rule::before {
  content:""; position:absolute; top:-3px; width:7px; height:7px;
  border-top:1px solid var(--bezel-hi); border-right:1px solid var(--bezel-hi);
}
.cc-dimline__rule:first-child::before { left:0; transform:rotate(-135deg); transform-origin:center; }
.cc-dimline__rule:last-child::before  { right:0; transform:rotate(45deg); transform-origin:center; }
.cc-dimline__label {
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.18em; text-transform:uppercase;
  color:var(--muted); font-variant-numeric:tabular-nums; white-space:nowrap;
}

/* ---- hero gauge ---- */
.cc-gauge { margin:0; justify-self:center; display:flex; flex-direction:column; align-items:center; gap:16px; }
.cc-gauge__svg { width:min(320px, 72vw); height:auto; filter:drop-shadow(0 24px 50px rgba(0,0,0,.5)); }
/* Needle rest pivot comes from the SVG transform="rotate(440 110 110)" attribute,
   which works in every SVG renderer. The CSS sweep below only runs where
   transform-box:view-box can resolve the pivot (Chrome 64+, FF 55+, Safari 15.4+);
   CSS transform overrides the SVG attribute where supported. */
@supports (transform-box: view-box) {
  .cc-needle {
    transform-box:view-box; transform-origin:110px 110px;
    transform:rotate(440deg);
    animation:cc-sweep 1100ms cubic-bezier(.2,.8,.2,1) both;
  }
  @media (prefers-reduced-motion: reduce) {
    .cc-needle { animation:none; transform:rotate(440deg); }
  }
}
.cc-gauge__readout {
  display:flex; flex-direction:column; align-items:center; gap:6px; text-align:center;
}
.cc-gauge__psi {
  font-family:var(--font-display); font-weight:700; font-size:2.4rem; line-height:1;
  color:var(--cyan); letter-spacing:.02em; font-variant-numeric:tabular-nums;
  text-shadow:0 0 18px rgba(56,224,214,.4);
}
.cc-gauge__psi small { font-family:var(--font-mono); font-size:.8rem; letter-spacing:.16em; color:var(--muted); }
.cc-gauge__status {
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted);
}
.cc-dot { width:8px; height:8px; border-radius:50%; background:var(--cyan); box-shadow:0 0 10px var(--cyan); animation:cc-pulse 2s ease-in-out infinite; }

/* compliance placard (affiliate disclosure) */
.cc-placard {
  position:relative; margin-top:38px;
  background:var(--steel-900);
  border:1px solid var(--bezel); border-left:4px solid var(--orange);
  border-radius:12px; padding:22px 22px 20px; overflow:hidden;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.cc-placard::before {
  content:""; position:absolute; top:0; left:0; right:0; height:6px;
  background:repeating-linear-gradient(45deg, var(--orange) 0 12px, #14283C 12px 24px);
  opacity:.85;
}
.cc-placard__tag {
  display:inline-block; margin-bottom:9px;
  font-family:var(--font-mono); font-size:.66rem; letter-spacing:.22em; text-transform:uppercase; font-weight:600;
  color:var(--orange);
}
.cc-placard p { margin:0; line-height:1.55; color:var(--text); }
.cc-placard strong { color:var(--orange); }
.cc-imgnote {
  margin:14px 2px 0; color:var(--muted); font-size:.88rem; line-height:1.55;
  font-family:var(--font-mono); letter-spacing:.02em;
}

/* ----------------------------------------------------------- */
/* gauge clusters (sections)                                   */
/* ----------------------------------------------------------- */
.tool-section {
  position:relative;
  padding-top:44px; margin-top:44px;
  border-top:1px solid rgba(0,0,0,.5);
  box-shadow:0 -1px 0 rgba(255,255,255,.05);
}
.section-heading { max-width:860px; margin-bottom:26px; }
.cluster-top { display:flex; align-items:baseline; justify-content:space-between; gap:16px; }
.cluster-readout { color:var(--muted); font-family:var(--font-mono); font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; font-variant-numeric:tabular-nums; white-space:nowrap; }
.section-heading h2 {
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(1.85rem, 4vw, 3rem); line-height:1; letter-spacing:-.01em;
  margin:.18em 0 .28em; scroll-margin-top:120px;
}
.cluster-desc { color:var(--muted); font-size:1.05rem; line-height:1.55; margin:0; max-width:62ch; }
.cluster-tip {
  display:inline-block; margin-top:14px;
  font-family:var(--font-mono); font-size:.7rem; letter-spacing:.13em; text-transform:uppercase;
  color:var(--orange); background:var(--orange-soft);
  border:1px solid rgba(255,122,26,.28); border-radius:6px; padding:6px 11px;
}

/* ----------------------------------------------------------- */
/* tool grid + instrument-module cards                         */
/* ----------------------------------------------------------- */
.tool-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:18px; }
.tool-grid--four { grid-template-columns:repeat(4, 1fr); }

.tool-card {
  position:relative; display:flex; flex-direction:column; min-height:388px;
  background:var(--steel-900);
  border:1px solid var(--bezel); border-radius:16px;
  padding:16px; color:var(--text); overflow:hidden;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05), 0 18px 44px rgba(0,0,0,.32);
  transition:transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
/* energized left edge bar */
.tool-card::before {
  content:""; position:absolute; left:0; top:0; bottom:0; width:3px;
  background:var(--orange);
  transform:scaleY(0); transform-origin:bottom;
  transition:transform .18s ease;
}
.tool-card:hover, .tool-card:focus-visible {
  transform:translateY(-3px);
  border-color:rgba(56,224,214,.55);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08), 0 26px 60px rgba(0,0,0,.42), 0 0 0 1px rgba(56,224,214,.18);
  outline:none;
}
.tool-card:hover::before, .tool-card:focus-visible::before { transform:scaleY(1); }
.tool-card:focus-visible { outline:2px solid var(--focus); outline-offset:2px; }

/* lit product window */
.tool-image-wrap {
  position:relative; display:flex; align-items:center; justify-content:center;
  height:200px; margin-bottom:14px; border-radius:12px;
  background:radial-gradient(circle at 50% 32%, #FFFFFF, #E7F0F7);
  border:1.5px solid rgba(56,224,214,.55);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.5), inset 0 12px 26px rgba(255,255,255,.55), 0 10px 24px rgba(0,0,0,.28);
  overflow:hidden;
}
/* top sheen */
.tool-image-wrap::before {
  content:""; position:absolute; inset:0; pointer-events:none; border-radius:inherit;
  background:linear-gradient(180deg, rgba(255,255,255,.5), transparent 38%);
}
/* corner screws */
.tool-image-wrap::after {
  content:""; position:absolute; inset:7px; pointer-events:none;
  background:
    radial-gradient(circle 2.4px at 6px 6px, #93acbe 55%, transparent 60%),
    radial-gradient(circle 2.4px at calc(100% - 6px) 6px, #93acbe 55%, transparent 60%),
    radial-gradient(circle 2.4px at 6px calc(100% - 6px), #93acbe 55%, transparent 60%),
    radial-gradient(circle 2.4px at calc(100% - 6px) calc(100% - 6px), #93acbe 55%, transparent 60%);
}
.tool-image { position:relative; z-index:1; display:block; max-width:92%; max-height:176px; object-fit:contain; filter:drop-shadow(0 8px 12px rgba(5,16,31,.22)); }

/* meta row: index + spec chips */
.tool-meta { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px; min-height:22px; }
.tool-index { font-family:var(--font-mono); font-size:.72rem; letter-spacing:.16em; color:var(--muted); font-variant-numeric:tabular-nums; }
.tool-tags { display:flex; gap:6px; flex-wrap:nowrap; overflow:hidden; }
.tool-tag {
  font-family:var(--font-mono); font-size:.62rem; letter-spacing:.1em; text-transform:uppercase; font-weight:500;
  color:var(--cyan); background:var(--cyan-soft);
  border:1px solid rgba(56,224,214,.26); border-radius:5px; padding:4px 7px;
  white-space:nowrap; max-width:22ch; overflow:hidden; text-overflow:ellipsis;
}

.tool-card h3 { font-family:var(--font-display); font-weight:700; font-size:1.32rem; letter-spacing:.005em; margin:0 0 8px; }
.tool-card p { color:var(--muted); line-height:1.5; margin:0 0 20px; font-size:.97rem; }

.shop-link {
  display:inline-flex; align-items:center; gap:8px; margin-top:auto;
  font-family:var(--font-mono); font-size:.76rem; letter-spacing:.12em; text-transform:uppercase; font-weight:600;
  color:var(--orange);
}
.shop-arrow { transition:transform .16s ease; }
.tool-card:hover .shop-arrow, .tool-card:focus-visible .shop-arrow { transform:translateX(4px); }

/* ----------------------------------------------------------- */
/* footer control terminal                                     */
/* ----------------------------------------------------------- */
.cc-terminal {
  position:relative; margin-top:60px;
  background:var(--steel-900); border:1px solid var(--bezel); border-radius:20px;
  padding:36px 34px 32px; overflow:hidden;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.cc-terminal__tag {
  display:inline-block; margin-bottom:12px;
  font-family:var(--font-mono); font-size:.66rem; letter-spacing:.22em; text-transform:uppercase; font-weight:600; color:var(--cyan);
}
.cc-terminal h2 { font-family:var(--font-display); font-weight:700; font-size:clamp(1.8rem, 3.4vw, 2.8rem); letter-spacing:-.01em; margin:0 0 12px; }
.cc-terminal p { color:var(--muted); line-height:1.55; max-width:62ch; margin:0 0 22px; }
.button-link {
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:15px 24px; border-radius:10px;
  font-family:var(--font-mono); font-weight:600; letter-spacing:.1em; text-transform:uppercase; font-size:.82rem;
  color:#0A1622; background:linear-gradient(180deg, #FF9442, var(--orange));
  border:1px solid rgba(255,180,120,.5);
  box-shadow:0 10px 26px rgba(255,122,26,.28);
  transition:box-shadow .18s ease, transform .16s ease;
}
.button-link:hover { box-shadow:0 12px 38px rgba(255,122,26,.5), 0 0 0 3px var(--orange-soft); transform:translateY(-1px); }
.cc-terminal .cc-chip { margin-top:20px; }

/* ----------------------------------------------------------- */
/* keyframes                                                   */
/* ----------------------------------------------------------- */
@keyframes cc-sweep {
  0%   { transform:rotate(225deg); }
  72%  { transform:rotate(450deg); }
  100% { transform:rotate(440deg); }
}
@keyframes cc-pulse {
  0%, 100% { opacity:.45; }
  50%      { opacity:1; }
}

/* (needle sweep is applied inside the @supports (transform-box:view-box) block) */

/* ----------------------------------------------------------- */
/* responsive                                                  */
/* ----------------------------------------------------------- */
@media (max-width:1100px) {
  .tool-grid--four { grid-template-columns:repeat(2, 1fr); }
}
@media (max-width:960px) {
  .tool-grid { grid-template-columns:repeat(2, 1fr); }
}
@media (max-width:820px) {
  .cc-hero__manifold { grid-template-columns:1fr; gap:30px; }
  .cc-gauge { order:-1; }
  .cc-hero__copy h1 { max-width:none; }
}
@media (max-width:760px) {
  .page::before, .page::after { display:none; }
}
@media (max-width:620px) {
  .nav { flex-direction:column; align-items:flex-start; gap:12px; }
  .nav-links { justify-content:flex-start; }
  .cc-seg { flex:0 0 auto; scroll-snap-align:start; }
  .cc-selector__track {
    scroll-snap-type:x proximity;
    -webkit-mask-image:linear-gradient(to right, #000 calc(100% - 26px), transparent);
            mask-image:linear-gradient(to right, #000 calc(100% - 26px), transparent);
  }
  .tool-grid, .tool-grid--four { grid-template-columns:1fr; }
  .tool-card { min-height:auto; }
  .cluster-top { flex-direction:column; gap:6px; align-items:flex-start; }
  .cc-terminal, .cc-placard { padding:24px 20px; }
}

/* ----------------------------------------------------------- */
/* reduced motion                                              */
/* ----------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  /* .cc-needle reduced-motion rest handled inside @supports (transform-box:view-box) */
  .cc-dot { animation:none; opacity:1; }
  .tool-card, .tool-card::before, .shop-arrow, .button-link { transition:none; }
}