/* Campbell Solutions — Careers site
   Self-contained build of the Claude Design system (dark monochrome).
   Tokens + base + component/hover rules resolved for production. */

/* ============================ TOKENS ============================ */
:root {
  /* Colour — dark, fully monochrome. White (#fafafa) is the only accent. */
  --cs-black:        #0a0a0a;
  --cs-surface-1:    #0f0f0f;
  --cs-surface-2:    #131313;
  --cs-white:        #fafafa;

  --cs-white-100:    #fafafa;
  --cs-white-55:     rgba(250, 250, 250, 0.55);
  --cs-white-45:     rgba(250, 250, 250, 0.45);
  --cs-white-30:     rgba(250, 250, 250, 0.30);
  --cs-white-14:     rgba(250, 250, 250, 0.14);
  --cs-white-08:     rgba(250, 250, 250, 0.08);
  --cs-white-04:     rgba(250, 250, 250, 0.04);

  --surface-page:    var(--cs-black);
  --surface-card:    var(--cs-surface-1);
  --surface-raised:  var(--cs-surface-2);
  --surface-inverse: var(--cs-white);

  --text-primary:    var(--cs-white-100);
  --text-secondary:  var(--cs-white-55);
  --text-dim:        var(--cs-white-45);
  --text-faint:      var(--cs-white-30);
  --text-inverse:    var(--cs-black);

  --border-hairline: var(--cs-white-08);
  --border-strong:   var(--cs-white-14);
  --border-divider:  var(--cs-white-08);
  --focus-ring:      rgba(250, 250, 250, 0.35);

  /* Type */
  --font-display: "Syne", "Inter", system-ui, sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, sans-serif;
  --font-serif:   "Fraunces", Georgia, "Times New Roman", serif;
  --font-mono:    "Inter", ui-monospace, "SF Mono", monospace;

  --weight-regular: 400;
  --weight-medium:  500;
  --weight-semibold: 600;

  --tracking-display: -0.04em;
  --leading-display:  1.04;
  --leading-body:     1.6;

  --eyebrow-size:     11px;
  --eyebrow-tracking: 0.15em;
  --eyebrow-weight:   500;

  --text-display-xl: 76px;
  --text-display-l:  56px;
  --text-display-m:  40px;
  --text-heading:    28px;
  --text-subhead:    20px;
  --text-body-lg:    18px;
  --text-body:       16px;
  --text-body-sm:    14px;
  --text-caption:    13px;
  --text-micro:      11px;

  /* Spacing / radius / layout / motion */
  --space-1:4px; --space-2:8px; --space-3:12px; --space-4:16px; --space-5:24px;
  --space-6:32px; --space-7:48px; --space-8:64px; --space-9:96px; --space-10:128px;

  --radius-sharp: 4px;
  --radius-pill:  9999px;

  --content-max:   1400px;
  --gutter:        32px;
  --section-rhythm: 96px;
  --pad-card: 32px;

  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast:   140ms;
  --dur-base:   240ms;
  --dur-slow:   480ms;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: var(--weight-regular);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-display);
  margin: 0;
}

.cs-eyebrow {
  font-family: var(--font-body);
  font-size: var(--eyebrow-size);
  font-weight: var(--eyebrow-weight);
  letter-spacing: var(--eyebrow-tracking);
  text-transform: uppercase;
  color: var(--text-dim);
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--cs-white); color: var(--cs-black); }

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ============================ BUTTONS ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--dur-base) var(--ease-out);
  white-space: nowrap;
  text-decoration: none;
  padding: 16px 32px;
  font-size: 15px;
}
.btn:active { transform: scale(0.98); }
.btn--sm { padding: 10px 20px; font-size: 13px; }
.btn--lg { padding: 18px 40px; font-size: 16px; }

.btn--primary {
  background: var(--cs-white);
  color: var(--cs-black);
  border-radius: var(--radius-pill);
}
.btn--primary:hover { opacity: 0.9; }

.btn--secondary {
  background: transparent;
  color: var(--cs-white);
  border: 1px solid var(--cs-white-30);
  border-radius: var(--radius-pill);
}
.btn--secondary:hover { border-color: var(--cs-white-55); }

.btn--header {
  background: var(--cs-white);
  color: var(--cs-black);
  border-radius: var(--radius-sharp);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 600;
  padding: 11px 20px;
}
.btn--header:hover { opacity: 0.9; }

.btn--ghost {
  background: transparent;
  color: var(--cs-white);
  border-radius: var(--radius-sharp);
}
.btn--ghost:hover { background: var(--cs-white-04); }

.btn--block { width: 100%; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.4; cursor: not-allowed; }

/* ============================ NAV ============================ */
.cs-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.cs-nav.is-scrolled {
  background: rgba(10,10,10,0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-hairline);
}
.cs-nav__inner {
  max-width: var(--content-max); margin: 0 auto;
  padding: 0 40px; height: 72px;
  display: flex; align-items: center; justify-content: space-between;
}
.cs-logo {
  font-family: var(--font-serif); font-weight: 700; font-size: 27px;
  letter-spacing: -0.05em; color: var(--cs-white); line-height: 1;
}
.cs-nav__links { display: flex; align-items: center; gap: 38px; }
.cs-navlink {
  font-family: var(--font-body); font-size: 14px;
  color: var(--text-secondary); text-decoration: none;
  transition: color var(--dur-base) var(--ease-out);
}
.cs-navlink:hover { color: var(--text-primary); }

/* mobile nav toggle (hidden on desktop) */
.cs-nav__toggle { display: none; background: none; border: 0; color: var(--cs-white); cursor: pointer; padding: 8px; }

/* ============================ LINKS / HOVER UTILS ============================ */
.cs-link {
  color: var(--text-secondary); text-decoration: none;
  transition: color var(--dur-base) var(--ease-out);
}
.cs-link:hover { color: var(--text-primary); }
.cs-link--dim { color: var(--text-dim); }
.cs-link--dim:hover { color: var(--text-primary); }

/* Cards that lift to a raised surface on hover */
.cs-cell {
  background: var(--cs-black);
  transition: background var(--dur-base) var(--ease-out);
}
.cs-cell:hover { background: var(--surface-card); }

/* Text that brightens to primary on hover (converted from style-hover) */
.cs-hover-primary { transition: color var(--dur-base) var(--ease-out); }
.cs-hover-primary:hover { color: var(--text-primary) !important; }

/* ============================ LAYOUT HELPERS ============================ */
.cs-wrap { max-width: var(--content-max); margin: 0 auto; padding-left: 40px; padding-right: 40px; }
.cs-grid-1px {
  display: grid; gap: 1px;
  background: var(--border-hairline);
  border: 1px solid var(--border-hairline);
  border-radius: 4px; overflow: hidden;
}

/* ============================ REVEAL ============================ */
[data-reveal] { opacity: 1; transform: none; }
.reveal-init [data-reveal] {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-init [data-reveal].is-in { opacity: 1; transform: translateY(0); }

/* ============================ MARQUEE ============================ */
@keyframes cs-marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.cs-marquee-mask {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
  mask-image: linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
}
.cs-marquee-track { display: flex; width: max-content; animation: cs-marquee 42s linear infinite; }
.cs-marquee-group { display: flex; align-items: center; gap: 64px; padding-right: 64px; }
.cs-marquee-group span { font-size: 18px; color: var(--text-secondary); white-space: nowrap; }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 920px) {
  .cs-grid-3 { grid-template-columns: 1fr 1fr !important; }
}
@media (max-width: 720px) {
  .cs-wrap { padding-left: 22px; padding-right: 22px; }
  .cs-nav__inner { padding: 0 22px; }
  .cs-nav__links { gap: 20px; }
  .cs-nav__links .cs-navlink { display: none; }
  .cs-nav__links .btn { padding: 9px 16px; }
  h1 { font-size: 44px !important; }
  h2 { font-size: 32px !important; }
  .cs-grid-2, .cs-grid-3 { grid-template-columns: 1fr !important; }
  .cs-footer-grid { grid-template-columns: 1fr 1fr !important; gap: 40px !important; }
  .cs-section { padding-top: 64px !important; padding-bottom: 64px !important; }
  .cs-hero { padding-top: 116px !important; padding-bottom: 72px !important; }
}
@media (max-width: 480px) {
  .cs-footer-grid { grid-template-columns: 1fr !important; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; }
  .reveal-init [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}