/* ------------------------------------------------------------------
   Lambda Facilities — shared styles
   Dark grey theme, hairline black borders, streamlined not blocky.
   ------------------------------------------------------------------ */

:root {
  /* Core palette */
  --bg:          #1b1c1f;   /* page background — dark grey */
  --bg-sunk:    #15161a;   /* slightly deeper area */
  --bg-lift:    #222429;   /* raised surface (cards) */
  --bg-lift-2:  #292b31;   /* interactive/hover surface */

  /* Hairline borders — black with a whisper of contrast */
  --border:     #0b0c0e;   /* the black border the brand uses */
  --border-soft:#34363c;   /* very faint interior divider */

  /* Typography */
  --text:        #ececee;  /* primary */
  --text-dim:    #b6b9c0;  /* secondary */
  --text-mute:   #7e828b;  /* tertiary / labels */
  --text-hair:   #55585f;  /* almost-invisible meta text */

  /* Accent — champagne gold. One place to change the whole brand. */
  --accent:      #c9a961;
  --accent-hover:#dbbc75;
  --accent-rgb:  201, 169, 97;   /* for rgba() tints */

  --radius: 2px;                  /* almost square; keeps it architectural */
  --radius-lg: 4px;
  --max-width: 1120px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Transitions */
  --t: 0.18s ease;
}

/* Reset ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 300;               /* LIGHT weight for streamlined feel */
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--t);
}
a:hover { color: var(--accent-hover); }

/* Headings: light, with tight tracking. Nothing shouty. */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text);
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2rem, 4.5vw, 2.9rem); font-weight: 200; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.8rem); }
h3 { font-size: 1.1rem; font-weight: 400; }

p  { margin: 0 0 1em; color: var(--text-dim); font-weight: 300; }
.lead {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 62ch;
  font-weight: 300;
  line-height: 1.65;
}
strong { font-weight: 500; color: var(--text); }

/* Eyebrow / kicker */
.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mute);
  font-weight: 500;
  margin-bottom: 1.1rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 0.65rem;
  margin-bottom: 3px;
}

/* Layout --------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 2.7rem 0 4.5rem; }
section.tight { padding: 1.5rem 0 2.5rem; }
section.sunk { background: var(--bg-sunk); }

/* A very subtle hairline separator between sections */
section + section { border-top: 1px solid var(--border-soft); }

/* Header / nav --------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(27, 28, 31, 0.85);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  font-weight: 400;
  font-size: 1.575rem;
  color: var(--text);
  letter-spacing: -0.005em;
}
.brand:hover { color: var(--text); }
.brand .lambda {
  color: var(--accent);
  font-family: "Times New Roman", Georgia, serif;
  font-size: 2.175rem;
  line-height: 1;
  font-weight: 400;
}

.nav {
  display: flex;
  gap: 1.8rem;
  align-items: center;
}
.nav a {
  color: var(--text-dim);
  font-size: 1.094rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  padding: 0.35rem 0;
  position: relative;
  transition: color var(--t);
}
.nav a:hover { color: var(--text); }
.nav a.active { color: var(--text); }
.nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -3px;
  height: 1px;
  background: var(--accent);
}

/* Mobile nav button */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text);
  margin: 5px 0;
}

/* Buttons -------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--t), border-color var(--t), color var(--t);
}
.btn-primary {
  background: transparent;
  color: var(--text);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent);
  color: #15161a;
  border-color: var(--accent);
}
.btn-outline {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border-soft);
}
.btn-outline:hover {
  color: var(--text);
  border-color: var(--text-dim);
  background: transparent;
}
.btn + .btn { margin-left: 0.5rem; }

/* Hero ----------------------------------------------------------- */
.hero {
  position: relative;
  padding: 3.6rem 0 4.5rem;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg);
  overflow: hidden;
  isolation: isolate;         /* contain the image/overlay layers */
}
/* Placeholder image layer */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('images/hero-placeholder.png');
  background-size: cover;
  background-position: center right;
  background-repeat: no-repeat;
  opacity: 0.28;              /* faded so it doesn't clash with text */
  z-index: -2;
}
/* Gradient overlay keeps the left (text) side clean and adds warmth */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg,
      var(--bg) 0%,
      var(--bg) 28%,
      rgba(27, 28, 31, 0.78) 55%,
      rgba(27, 28, 31, 0.35) 100%),
    radial-gradient(ellipse 80% 60% at 30% 10%, rgba(var(--accent-rgb), 0.05), transparent 60%);
  z-index: -1;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 {
  margin-bottom: 1.1rem;
  max-width: 22ch;
}
.hero .lead { margin-bottom: 2rem; max-width: 56ch; }

/* On narrower viewports, let the image settle behind the text more evenly. */
@media (max-width: 720px) {
  .hero::before { opacity: 0.18; }
  .hero::after {
    background:
      linear-gradient(180deg,
        rgba(27, 28, 31, 0.55) 0%,
        rgba(27, 28, 31, 0.85) 60%,
        var(--bg) 100%),
      radial-gradient(ellipse 80% 60% at 30% 10%, rgba(var(--accent-rgb), 0.05), transparent 60%);
  }
}

/* Page header (non-home pages) ---------------------------------- */
.page-header {
  padding: 1.8rem 0 1.75rem;          /* ~2/3 the original height */
  border-bottom: 1px solid var(--border);
  background: var(--bg-sunk);
}
.page-header .eyebrow { margin-bottom: 0.75rem; }
.page-header h1 {
  margin-bottom: 0.3rem;
  font-size: clamp(1.7rem, 3.6vw, 2.2rem);  /* slightly smaller to match tighter strip */
}
.page-header p { color: var(--text-mute); margin: 0; font-size: 0.95rem; }

/* Capability chips strip ---------------------------------------- */
/* A thin hairline strip of small capability labels.
   Used above the rental carousel and between hero & content on home. */
.chips-strip {
  padding: 1rem 0;
  background: var(--bg-sunk);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.chips-strip.flush { border-top: none; }      /* when it sits directly under the hero */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}
.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 500;
  font-family: var(--font-sans);
  white-space: nowrap;
  transition: color var(--t), border-color var(--t);
}
.chip.accent {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.45);
}

/* Feature section (e.g. Cinematic Live) -------------------------- */
/* Slightly roomier, a larger display H2, and a hairline capabilities list. */
.feature { padding: 3rem 0 5rem; }
.feature h2.display {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 200;
  letter-spacing: -0.02em;
  margin-bottom: 1.1rem;
}
.feature .lead { margin-bottom: 1.5rem; max-width: 56ch; }
.capabilities {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  border-top: 1px solid var(--border-soft);
}
.capabilities li {
  padding: 0.7rem 0 0.7rem 1.4rem;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.95rem;
  color: var(--text-dim);
  position: relative;
  font-weight: 300;
}
.capabilities li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0.7rem;
  color: var(--accent);
  font-weight: 400;
}

/* Grids ---------------------------------------------------------- */
.grid {
  display: grid;
  gap: 1.25rem;
}
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* Cards: the key to the streamlined look.
   Dark grey surface + 1px black border, no shadow, barely any radius. */
.card {
  background: var(--bg-lift);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: background var(--t), border-color var(--t);
}
.card:hover {
  background: var(--bg-lift-2);
  border-color: #000;
}
.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.card p { font-size: 0.95rem; color: var(--text-dim); }
.card p:last-child { margin-bottom: 0; }

/* A thin "tag" slug that sits above a card heading */
.card .tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
  font-weight: 500;
  margin-bottom: 0.6rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-soft);
}
.card ul {
  padding-left: 1.1rem;
  color: var(--text-dim);
  font-size: 0.92rem;
}
.card ul li { margin-bottom: 0.35rem; }
.card ul li::marker { color: var(--text-hair); }

/* Prose pages ---------------------------------------------------- */
.prose { max-width: 68ch; }
.prose h2 { margin-top: 2.5rem; }
.prose ul { padding-left: 1.25rem; color: var(--text-dim); }
.prose li { margin-bottom: 0.4rem; }
.prose li::marker { color: var(--text-hair); }

/* Contact card --------------------------------------------------- */
.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  background: var(--bg-lift);
  max-width: 480px;
}
.contact-card .label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-mute);
  margin-bottom: 0.4rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-soft);
}
.contact-card .email-value {
  font-size: 1.15rem;
  font-weight: 400;
  word-break: break-all;
}

/* Footer --------------------------------------------------------- */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border-soft);
  background: var(--bg-sunk);
  color: var(--text-dim);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-footer strong { color: var(--text); font-weight: 400; }
.site-footer a { color: var(--text-dim); }
.site-footer a:hover { color: var(--text); }
.site-footer .muted {
  color: var(--text-hair);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}

/* --------------------------------------------------------------- */
/* Rental carousel / tabs
   Headings that the user clicks, with a sliding panel below.     */
/* --------------------------------------------------------------- */
.systems {
  /* no heavy outer container; keep it airy */
}

.systems-tabs {
  display: flex;
  flex-wrap: nowrap;              /* keep all tabs on one row */
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.25rem;
  overflow-x: auto;               /* quietly scroll on narrow viewports */
  scrollbar-width: none;          /* Firefox */
}
.systems-tabs::-webkit-scrollbar { display: none; }   /* WebKit */

.systems-tab {
  background: transparent;
  color: var(--text-mute);
  border: none;
  border-bottom: 1px solid transparent;
  padding: 1rem 0;                /* trailing space handled by margin */
  margin-right: 1.25rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 300;
  letter-spacing: -0.005em;
  cursor: pointer;
  text-align: left;
  position: relative;
  white-space: nowrap;            /* keep each label on one line */
  flex: 0 0 auto;
  transition: color var(--t);
}
.systems-tab:last-child { margin-right: 0; }
.systems-tab .idx {
  color: var(--text-hair);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  margin-right: 0.55rem;
  vertical-align: middle;
}
.systems-tab:hover { color: var(--text-dim); }
.systems-tab[aria-selected="true"] {
  color: var(--text);
}
.systems-tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--accent);
}

/* The scrolling panel track */
.systems-track {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-lift);
}
.systems-viewport {
  display: flex;
  width: 100%;
  transition: transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.systems-slide {
  flex: 0 0 100%;
  min-width: 100%;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0;
}
.systems-slide .media {
  background: var(--bg-sunk);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 1rem;
}
.systems-slide .media img,
.systems-slide .media svg {
  width: 100%;
  height: 100%;
  max-height: 380px;
  object-fit: contain;
}
.systems-slide .body {
  padding: 2rem 2.25rem;
  position: relative;            /* anchor for the Coming Soon overlay */
}

/* Per-slide capability chip row — sits directly below the System heading.
   Same visual language as the page-level chips, slightly more compact. */
.systems-slide .slide-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0.25rem 0 1.25rem;
  border-top: none;          /* belt & braces: never inherit a spec-list top border */
}
.systems-slide .slide-chips .chip {
  padding: 0.25rem 0.7rem;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
}

.systems-slide .body .tier {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.systems-slide .body h3 {
  font-size: 1.4rem;
  font-weight: 300;
  margin-bottom: 0.75rem;
}
/* Spec list — scoped to exclude .slide-chips so chip borders aren't overridden */
.systems-slide .body ul:not(.slide-chips) {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  border-top: 1px solid var(--border-soft);
}
.systems-slide .body ul:not(.slide-chips) li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.92rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.systems-slide .body ul:not(.slide-chips) li .k {
  color: var(--text-mute);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Coming-soon state ---------------------------------------------- */
/* Details are rendered but visually muted + covered by a centred badge.
   Media is dimmed too so the whole slide reads as "not yet available". */
.systems-slide.coming-soon .media {
  filter: grayscale(1) brightness(0.55);
  opacity: 0.6;
}
.systems-slide.coming-soon .body > :not(.coming-soon-overlay) {
  opacity: 0.3;
  filter: grayscale(1);
  pointer-events: none;
  user-select: none;
}
.coming-soon-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.4rem;
  background: linear-gradient(
    180deg,
    rgba(27, 28, 31, 0.55) 0%,
    rgba(27, 28, 31, 0.82) 100%
  );
  text-align: center;
  padding: 1.5rem;
}
.coming-soon-overlay .cs-badge {
  display: inline-block;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 500;
  background: rgba(var(--accent-rgb), 0.06);
  border-radius: var(--radius);
}
.coming-soon-overlay .cs-sub {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 300;
  max-width: 34ch;
  margin: 0;
}

/* Carousel arrows & dots */
.systems-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.25rem;
}
.systems-nav {
  display: flex;
  gap: 0.4rem;
}
.systems-nav button {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color var(--t), color var(--t);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.systems-nav button:hover {
  color: var(--text);
  border-color: var(--text-dim);
}
.systems-nav button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.systems-dots {
  display: flex;
  gap: 0.5rem;
}
.systems-dots .dot {
  width: 20px;
  height: 1px;
  background: var(--border-soft);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background var(--t), width var(--t);
}
.systems-dots .dot.active {
  background: var(--accent);
  width: 28px;
}

/* Responsive ----------------------------------------------------- */
@media (max-width: 860px) {
  .systems-slide {
    grid-template-columns: 1fr;
  }
  .systems-slide .media {
    border-right: none;
    border-bottom: 1px solid var(--border);
    min-height: 240px;
  }
  .systems-slide .body { padding: 1.5rem 1.5rem 1.75rem; }
}

@media (max-width: 720px) {
  section { padding: 1.8rem 0 3rem; }
  .hero { padding: 2.1rem 0 2.5rem; }
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }

  .nav {
    display: none;
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-sunk);
    border-bottom: 1px solid var(--border);
    padding: 0.25rem 1.5rem;
  }
  .nav.open { display: flex; }
  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border-soft);
  }
  .nav a:last-child { border-bottom: none; }
  .nav a.active::after { display: none; }
  .nav a.active { color: var(--accent); }
  .nav-toggle { display: inline-block; }

  .systems-tabs { overflow-x: auto; flex-wrap: nowrap; }
  .systems-tab { white-space: nowrap; margin-right: 1.5rem; }
}

/* Reduce motion niceties */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .systems-viewport { transition: none; }
}