/* Silverlight Labs — site styles
   Layout concept: an ascent. Each page opens under a night sky lit by the logo's blue arc,
   above a white ridge line, then climbs into clean white content.
   Palette: the logo's three colors (navy-black, white, blue) plus tints of each. */
:root {
  color-scheme: light;
  /* Black — the logo's wordmark and disc */
  --black: #1F2C3A;
  --black-deep: #111A25;
  --black-soft: #2B3A4B;
  /* Blue — the logo's E bar and arrow glow */
  --blue: #4688E5;
  --blue-ink: #2462C8;      /* blue for text and buttons on white (AA contrast) */
  --blue-glow: #9CC7FA;
  --blue-wash: #EAF2FD;
  /* White */
  --white: #FFFFFF;
  --cloud: #F4F7FB;
  --line: #DCE3EC;
  --muted: #4E5C6D;
  --on-dark: #E8EEF6;
  --on-dark-muted: #A7B4C4;

  --display: "Lexend", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --body: "Source Serif 4", "Iowan Old Style", Georgia, "Times New Roman", serif;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: 1.5rem;
  --step-3: clamp(1.75rem, 1.35rem + 1.7vw, 2.5rem);
  --step-4: clamp(2.4rem, 1.5rem + 3.9vw, 4.4rem);
  --wrap: 1140px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 14px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--white);
  color: var(--black);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--display); color: var(--black); margin: 0; text-wrap: balance; line-height: 1.12; font-weight: 600; }
p { margin: 0; }
img { max-width: 100%; }
a { color: var(--blue-ink); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--blue); outline-offset: 3px;
}
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 50; background: var(--white); padding: 8px 12px; border-radius: 6px; }

/* Tracked label echoing the "L A B S" line of the logo */
.label {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--display); font-weight: 500; font-size: 0.78rem;
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--blue-ink);
}
.label::before { content: ""; width: 26px; height: 2px; background: var(--blue); border-radius: 2px; }
.on-dark .label { color: var(--blue-glow); }

/* Header */
.site-head { background: var(--white); border-bottom: 1px solid var(--line); position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 28px; padding-block: 12px; }
.brand img { height: 50px; width: auto; display: block; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 6px clamp(14px, 2.6vw, 30px); font-family: var(--display); font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--black); padding-block: 6px; border-bottom: 2px solid transparent; }
.nav a:hover { border-bottom-color: var(--line); }
.nav a[aria-current="page"] { border-bottom-color: var(--blue); }
.nav a.nav-cta { background: var(--black); color: var(--white); padding: 9px 18px; border-radius: 999px; border: 0; }
.nav a.nav-cta:hover { background: var(--blue-ink); }
.nav a.nav-cta[aria-current="page"] { background: var(--blue-ink); }

/* Night-sky bands */
.sky {
  position: relative; overflow: hidden; color: var(--on-dark);
  background:
    radial-gradient(1.2px 1.2px at 9% 24%, rgba(255,255,255,.75) 50%, transparent 51%),
    radial-gradient(1px 1px at 24% 66%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1.4px 1.4px at 41% 13%, rgba(255,255,255,.65) 50%, transparent 51%),
    radial-gradient(1px 1px at 55% 52%, rgba(255,255,255,.45) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 68% 30%, rgba(255,255,255,.55) 50%, transparent 51%),
    radial-gradient(1px 1px at 86% 10%, rgba(255,255,255,.6) 50%, transparent 51%),
    radial-gradient(1px 1px at 94% 58%, rgba(255,255,255,.4) 50%, transparent 51%),
    radial-gradient(70% 90% at 92% 8%, rgba(70,136,229,.32) 0%, rgba(70,136,229,0) 60%),
    linear-gradient(180deg, var(--black-deep) 0%, var(--black) 100%);
}
.sky .wrap { position: relative; z-index: 2; }
.sky h1 { color: var(--white); font-weight: 600; letter-spacing: -0.02em; }
.sky .lede { color: var(--on-dark); }
.trajectory { position: absolute; z-index: 1; right: 0; top: 0; height: 100%; width: min(46vw, 620px); pointer-events: none; }
.ridge { position: absolute; z-index: 1; left: 0; right: 0; bottom: -1px; width: 100%; display: block; height: clamp(70px, 11vw, 160px); }
.star { fill: var(--white); transform-box: fill-box; transform-origin: center; }
.star.blue { fill: var(--blue-glow); }
@media (prefers-reduced-motion: no-preference) {
  .star.twinkle { animation: twinkle 5s ease-in-out infinite; }
  .star.twinkle.late { animation-delay: 2s; }
}
@keyframes twinkle { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .5; transform: scale(.8); } }

.hero .wrap { padding-block: clamp(64px, 9vw, 116px) clamp(130px, 15vw, 210px); }
.hero h1 { font-size: var(--step-4); max-width: 15ch; margin-top: 22px; }
.hero h1 .accent { color: var(--blue-glow); display: block; }
.hero .lede { margin-top: 28px; max-width: 32em; font-size: var(--step-1); line-height: 1.55; }
.hero .actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }

.page-head .wrap { padding-block: clamp(52px, 7vw, 88px) clamp(104px, 12vw, 168px); }
.page-head h1 { font-size: var(--step-4); margin-top: 18px; }
.page-head .lede { margin-top: 22px; max-width: 40em; font-size: var(--step-1); line-height: 1.55; }

/* Buttons */
.btn {
  font-family: var(--display); font-weight: 500; font-size: 0.98rem; text-decoration: none; cursor: pointer;
  padding: 13px 22px; border-radius: 999px; display: inline-flex; align-items: center; gap: 10px; border: 1px solid transparent;
}
.btn.blue { background: var(--blue-ink); color: var(--white); }
.btn.blue:hover { background: #1C52AB; }
.btn.light { background: var(--white); color: var(--black); }
.btn.light:hover { background: var(--blue-wash); }
.btn.outline { color: var(--on-dark); border-color: rgba(232,238,246,.4); }
.btn.outline:hover { border-color: var(--on-dark); }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* Sections */
.section { padding-block: clamp(60px, 8vw, 104px); }
.section.cloud { background: var(--cloud); border-block: 1px solid var(--line); }
.section-head { display: grid; gap: 16px; max-width: 46rem; }
.section-head h2 { font-size: var(--step-3); letter-spacing: -0.01em; }
.section-head p { color: var(--muted); font-size: var(--step-1); line-height: 1.55; }

/* Home: approach */
.approach { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
.approach h2 { font-size: var(--step-3); margin-top: 18px; letter-spacing: -0.01em; }
.approach h2 span { display: block; }
.approach h2 span:last-child { color: var(--blue-ink); }
.approach .body { display: grid; gap: 20px; max-width: 36em; }
.approach .body p:first-child { font-size: var(--step-1); line-height: 1.55; }

.statement { background: var(--black); color: var(--white); position: relative; overflow: hidden; }
.statement .wrap { padding-block: clamp(56px, 7vw, 88px); display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(20px, 4vw, 48px); align-items: center; }
.statement img { width: clamp(64px, 9vw, 104px); height: auto; border-radius: 50%; display: block; }
.statement p { font-family: var(--display); font-weight: 500; font-size: var(--step-3); line-height: 1.22; letter-spacing: -0.01em; text-wrap: balance; }
.statement p em { font-style: normal; color: var(--blue-glow); }

/* Home: path cards */
.paths { margin-top: 44px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.paths.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.path {
  display: grid; gap: 12px; align-content: start; text-decoration: none; color: var(--black);
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px;
  transition: border-color .2s ease, transform .2s ease;
}
.path:hover { border-color: var(--blue); transform: translateY(-2px); }
.path h3 { font-size: var(--step-2); }
.path p { color: var(--muted); }
.path .go { margin-top: 6px; font-family: var(--display); font-size: 0.95rem; color: var(--blue-ink); }

/* Capabilities */
.practice-intro { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; font-family: var(--display); color: var(--muted); font-size: 0.95rem; }
.practice-intro ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.practice-intro a { display: inline-block; text-decoration: none; color: var(--black); background: var(--cloud); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 0.88rem; }
.practice-intro a:hover { border-color: var(--blue); color: var(--blue-ink); }
.practices { display: grid; gap: 0; margin-top: 28px; }
.practice {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(20px, 5vw, 72px);
  padding-block: clamp(36px, 5vw, 56px); border-top: 1px solid var(--line); scroll-margin-top: 96px;
}
.practice:last-child { border-bottom: 1px solid var(--line); }
.practice .num { font-family: var(--display); font-weight: 500; font-size: 0.85rem; letter-spacing: .24em; color: var(--blue-ink); }
.practice h2 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.1rem); margin-top: 12px; letter-spacing: -0.01em; }
.practice .lead { font-size: var(--step-1); line-height: 1.5; font-weight: 600; color: var(--black); }
.practice ul { list-style: none; margin: 22px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.practice li {
  font-family: var(--display); font-size: 0.88rem; line-height: 1.35; color: var(--black);
  background: var(--blue-wash); border: 1px solid #D2E2F8; border-radius: 8px; padding: 7px 12px;
}

/* Values */
.values-lead { font-family: var(--display); font-weight: 500; font-size: var(--step-3); line-height: 1.2; letter-spacing: -0.01em; max-width: 22ch; text-wrap: balance; }
.values { margin-top: 48px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.value { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(26px, 3vw, 36px); display: grid; gap: 14px; align-content: start; }
.value h2 { font-size: var(--step-2); display: flex; align-items: center; gap: 12px; }
.value h2 svg { width: 22px; height: 22px; flex: none; fill: var(--blue); }
.value p { color: var(--muted); }

/* CTA band */
.cta-band { background: var(--cloud); border-top: 1px solid var(--line); }
.cta-band .wrap { padding-block: clamp(48px, 6vw, 72px); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px 40px; }
.cta-band p { font-family: var(--display); font-weight: 500; font-size: var(--step-2); line-height: 1.3; max-width: 30ch; text-wrap: balance; }

/* Two-column split (About, Work With Us) */
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 6vw, 88px); align-items: start; }
.split .body { display: grid; gap: 20px; max-width: 38em; }
.big-statement { margin-top: 18px; font-family: var(--display); font-weight: 500; font-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem); line-height: 1.3; letter-spacing: -0.01em; color: var(--black); text-wrap: balance; }
.split-title { margin-top: 18px; font-size: var(--step-3); letter-spacing: -0.01em; }
.split .body strong { color: var(--black); font-weight: 600; }

/* Work With Us */
.page-head.long h1 { font-size: var(--step-3); max-width: 22ch; }
.connect { margin-top: 40px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.connect-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(24px, 3vw, 36px); display: grid; gap: 14px; align-content: start; }
.kicker { font-family: var(--display); font-weight: 500; font-size: 0.78rem; letter-spacing: .24em; text-transform: uppercase; color: var(--blue-ink); }
.connect-card .email { font-family: var(--display); font-weight: 500; font-size: clamp(1.15rem, 1rem + .8vw, 1.6rem); color: var(--black); text-decoration: none; overflow-wrap: anywhere; border-bottom: 2px solid var(--blue); justify-self: start; padding-bottom: 2px; }
.connect-card .email:hover { color: var(--blue-ink); }
.connect-card address { font-style: normal; font-size: var(--step-1); line-height: 1.55; color: var(--black); }
.table-wrap { overflow-x: auto; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
.facts { width: 100%; border-collapse: collapse; font-size: 1rem; }
.facts th, .facts td { text-align: left; padding: 16px 22px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.facts tbody tr:last-child th, .facts tbody tr:last-child td { border-bottom: 0; }
.facts thead th { font-family: var(--display); font-weight: 500; font-size: 0.78rem; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); background: var(--cloud); }
.facts tbody th { font-family: var(--display); font-weight: 500; font-size: 0.95rem; color: var(--black); width: 46%; }
.facts td { color: var(--black); }
.copyable { display: inline-flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.copyable .code { font-family: var(--display); font-weight: 600; letter-spacing: .08em; font-variant-numeric: tabular-nums; }
.copy-btn { display: inline-flex; align-items: center; gap: 6px; font-family: var(--display); font-size: 0.8rem; color: var(--blue-ink); background: var(--blue-wash); border: 1px solid #D2E2F8; border-radius: 999px; padding: 4px 10px; cursor: pointer; }
.copy-btn:hover { border-color: var(--blue); }
.copy-btn svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 2; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* Footer */
.site-foot { background: var(--white); border-top: 1px solid var(--line); }
.site-foot .wrap { padding-block: 40px 32px; display: grid; gap: 24px; }
.foot-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px 32px; }
.foot-top img { height: 44px; width: auto; display: block; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; font-family: var(--display); font-size: 0.92rem; }
.foot-nav a { color: var(--black); text-decoration: none; }
.foot-nav a:hover { color: var(--blue-ink); }
.foot-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-top: 20px; border-top: 1px solid var(--line); font-family: var(--display); font-size: 0.85rem; color: var(--muted); }
.foot-bottom strong { color: var(--black); font-weight: 500; }

/* Responsive */
@media (max-width: 900px) {
  .paths:not(.four) { grid-template-columns: minmax(0, 1fr); }
  .approach, .practice, .split { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  .values, .connect, .paths.four { grid-template-columns: minmax(0, 1fr); }
  .brand img { height: 40px; }
  .site-head .wrap { justify-content: center; }
  .nav { justify-content: center; font-size: 0.9rem; }
  .trajectory { display: none; }
  .statement .wrap { grid-template-columns: minmax(0, 1fr); }
}