/* ============================================================
   DPI Corp — Tier-1 dark monochrome rebuild
   ============================================================ */

:root {
  /* Color */
  --bg: #07080a;
  --bg-raised: #0d0e11;
  --bg-elevated: #111317;
  --text: #f4f4f5;
  --text-strong: #ffffff;
  --muted: #9b9ea5;
  --faint: #6a6d75;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-bright: rgba(255, 255, 255, 0.32);

  /* Spacing scale (px) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Layout */
  --container-max: 1200px;
  --container-pad: 32px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  /* Type */
  --font-sans: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Inter Tight", "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;
  --feat: "ss01", "cv11", "cv09", "ss03";
}

/* ===== Reset ===== */

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-sans);
  font-feature-settings: var(--feat);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 90% 50% at 50% -10%, rgba(255, 255, 255, 0.05), transparent 60%),
    radial-gradient(ellipse 60% 40% at 100% 8%, rgba(255, 255, 255, 0.03), transparent 70%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* faint grid behind everything, masked away below the hero */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 50%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 50%);
  z-index: 0;
}

p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

a {
  color: inherit;
  text-decoration: none;
}

img,
svg { display: block; max-width: 100%; }

/* ===== Skip link ===== */

.skip-link {
  position: absolute;
  top: -40px;
  left: var(--s-4);
  padding: var(--s-2) var(--s-4);
  background: var(--text-strong);
  color: var(--bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 100;
  transition: top 160ms ease;
}
.skip-link:focus { top: var(--s-4); }

/* ===== Container ===== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  position: relative;
  z-index: 1;
}

/* ===== Typography ===== */

.display,
.section-title,
.statement,
.card-title {
  margin: 0;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.display em,
.section-title em,
.statement em {
  font-family: var(--font-serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.display {
  font-size: clamp(2.6rem, 6.8vw, 4.8rem);
  line-height: 1.02;
  max-width: 16ch;
  letter-spacing: -0.035em;
}

.section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  line-height: 1.08;
  max-width: 22ch;
}

.statement {
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.25;
  max-width: 32ch;
  letter-spacing: -0.022em;
  font-weight: 500;
}

.card-title {
  font-size: 1.1rem;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: -0.012em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  margin: 0 0 var(--s-5);
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 500;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-strong);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.lead {
  margin-top: var(--s-6);
  max-width: 56ch;
  font-size: 1.06rem;
  line-height: 1.6;
  color: var(--muted);
}

.prose {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--muted);
  max-width: 56ch;
}
.prose + .prose { margin-top: var(--s-5); }

.prose-meta {
  margin-top: var(--s-6);
  font-size: 0.9rem;
  color: var(--faint);
  letter-spacing: 0.005em;
}

.inline-link {
  color: var(--text-strong);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
  transition: border-color 120ms ease;
}
.inline-link:hover,
.inline-link:focus-visible {
  border-bottom-color: var(--text-strong);
}

/* ===== Header ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 8, 10, 0.72);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s-4);
  padding-bottom: var(--s-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.012em;
  color: var(--text-strong);
}

.brand-mark {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-strong);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.brand-text { line-height: 1; }

.header-nav {
  display: inline-flex;
  align-items: center;
  gap: var(--s-7);
}

.nav-link {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: color 120ms ease;
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--text-strong); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 var(--s-4);
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  color: var(--text-strong);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: border-color 120ms ease, background 120ms ease;
}
.nav-cta:hover,
.nav-cta:focus-visible {
  border-color: var(--text-strong);
  background: rgba(255, 255, 255, 0.04);
}

/* ===== Hero ===== */

.hero {
  position: relative;
  padding-top: var(--s-9);
  padding-bottom: var(--s-9);
  border-bottom: 1px solid var(--line);
  overflow: clip;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: var(--s-7);
  overflow: visible;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-top: var(--s-7);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  height: 44px;
  padding: 0 var(--s-5);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.008em;
  cursor: pointer;
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

.btn-arrow { transition: transform 160ms ease; }
.btn:hover .btn-arrow,
.btn:focus-visible .btn-arrow { transform: translate(2px, -2px); }

.btn-primary {
  background: var(--text-strong);
  color: #0a0a0a;
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: #e8e8e8;
}

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text);
  background: transparent;
}
.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--text-strong);
  color: var(--text-strong);
}

/* Hero globe — bleeds past its column, no bounding box */

.hero-globe {
  position: relative;
  width: 120%;                 /* overflow into the gutter */
  max-width: none;
  aspect-ratio: 1 / 1;
  margin-right: -10%;
  margin-left: auto;
  pointer-events: none;
  /* radial mask so the dot field fades into the page rather than
     terminating in a hard square edge */
  -webkit-mask-image: radial-gradient(circle at center, #000 56%, rgba(0,0,0,0.55) 72%, transparent 86%);
          mask-image: radial-gradient(circle at center, #000 56%, rgba(0,0,0,0.55) 72%, transparent 86%);
}

.globe-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* ===== Trust strip ===== */

.trust {
  border-bottom: 1px solid var(--line);
}
.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-4);
  padding-top: var(--s-5);
  padding-bottom: var(--s-5);
  flex-wrap: wrap;
  text-align: center;
}
.trust-label {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 500;
}
.trust-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.trust-link:hover,
.trust-link:focus-visible { color: var(--text-strong); }

/* ===== Section base ===== */

.section {
  padding-top: var(--s-9);
  padding-bottom: var(--s-9);
  border-bottom: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.4fr) minmax(0, 0.6fr);
  gap: var(--s-8);
}

.section-aside,
.section-head { max-width: 36ch; }

.section-head {
  margin-bottom: var(--s-8);
}

.section-body { max-width: 60ch; }

/* ===== Cards ===== */

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-4);
  margin-top: var(--s-6);
}

.card {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  padding: var(--s-7);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), rgba(255, 255, 255, 0));
  transition: border-color 160ms ease, background 160ms ease;
  min-height: 280px;
}

.card:hover {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0));
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--s-5);
}

.card-index {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 500;
}

.card-glyph {
  color: var(--text-strong);
  opacity: 0.85;
  transition: opacity 200ms ease, transform 200ms ease;
}

.card:hover .card-glyph {
  opacity: 1;
  transform: translateY(-1px);
}

.card-copy {
  margin-top: var(--s-2);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 38ch;
}

/* ===== Statement section ===== */

.section-statement {
  padding-top: var(--s-10);
  padding-bottom: var(--s-10);
}

/* ===== Contact CTA ===== */

.section-cta {
  padding-top: var(--s-9);
  padding-bottom: var(--s-9);
  border-bottom: none;
}

.cta-block {
  max-width: 60ch;
}

.mailto-cta {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-4);
  margin-top: var(--s-7);
  padding-top: var(--s-5);
  padding-bottom: var(--s-5);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  color: var(--text-strong);
  transition: border-color 160ms ease;
  width: 100%;
  max-width: 540px;
}

.mailto-cta:hover,
.mailto-cta:focus-visible {
  border-color: var(--text-strong);
}

.mailto-label {
  flex-shrink: 0;
  color: var(--faint);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  font-weight: 500;
}

.mailto-address {
  flex: 1;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--text-strong);
}

.mailto-arrow {
  align-self: center;
  flex-shrink: 0;
  color: var(--text-strong);
  opacity: 0.7;
  transition: transform 160ms ease, opacity 160ms ease;
}

.mailto-cta:hover .mailto-arrow {
  transform: translate(3px, -3px);
  opacity: 1;
}

/* ===== Footer ===== */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg);
  padding-top: var(--s-8);
  padding-bottom: var(--s-7);
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding-bottom: var(--s-7);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  color: var(--text-strong);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: -0.005em;
}

.footer-brand-name { line-height: 1; }

.footer-built {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.footer-built:hover,
.footer-built:focus-visible { color: var(--text-strong); }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-7);
  padding-top: var(--s-7);
  padding-bottom: var(--s-7);
}

.footer-col { min-width: 0; }

.footer-label {
  margin-bottom: var(--s-4);
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.7rem;
  font-weight: 500;
}

.footer-line {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--muted);
}
.footer-line + .footer-line { margin-top: var(--s-2); }

.footer-meta {
  margin: var(--s-2) 0 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--faint);
}

.footer-meta-row {
  display: flex;
  justify-content: space-between;
  gap: var(--s-4);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--faint);
  flex-wrap: wrap;
}
.footer-meta-row p { margin: 0; }

/* ===== Focus rings ===== */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--text-strong);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== Responsive ===== */

@media (max-width: 1024px) {
  :root { --container-pad: 24px; }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--s-8);
  }
  .hero-globe {
    width: 100%;
    margin: 0 auto;
    max-width: 480px;
  }
  .section-grid {
    grid-template-columns: 1fr;
    gap: var(--s-6);
  }
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  :root { --container-pad: 20px; }

  .header-inner { padding-top: var(--s-3); padding-bottom: var(--s-3); }
  .header-nav { gap: var(--s-5); }

  .hero {
    padding-top: var(--s-8);
    padding-bottom: var(--s-8);
  }

  .hero-globe { max-width: 360px; }

  .section,
  .section-cta {
    padding-top: var(--s-8);
    padding-bottom: var(--s-8);
  }
  .section-statement {
    padding-top: var(--s-9);
    padding-bottom: var(--s-9);
  }

  .cards { grid-template-columns: 1fr; }
  .card { min-height: 0; padding: var(--s-6); }

  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-cols { grid-template-columns: 1fr; gap: var(--s-6); }
  .footer-meta-row { flex-direction: column; gap: var(--s-2); }
}

@media (max-width: 480px) {
  .nav-link[href="#what-we-build"],
  .nav-link[href="#ondc"] { display: none; }
  .header-nav { gap: 0; }

  .cta-row { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; width: 100%; }

  .mailto-cta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-2);
  }
  .mailto-arrow { align-self: flex-end; margin-top: -28px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}