/* ============================================================
   BURHANXAI LTD — cinematic dark design system
   Fonts: Sora (display) · Manrope (body) · JetBrains Mono (labels)
   ============================================================ */

:root {
  color-scheme: dark;

  /* Ink */
  --ink: #eef5ff;
  --ink-soft: #b6c7df;
  --ink-muted: #76889f;

  /* Surfaces */
  --bg: #04070e;
  --bg-2: #060b16;
  --surface: rgba(18, 32, 52, 0.42);
  --surface-2: rgba(24, 41, 66, 0.55);
  --surface-line: rgba(120, 165, 215, 0.14);
  --surface-line-strong: rgba(120, 165, 215, 0.26);

  /* Brand */
  --cyan: #21c4ff;
  --cyan-bright: #5fd6ff;
  --cyan-deep: #0a8fe0;
  --cyan-glow: rgba(33, 196, 255, 0.5);

  --radius: 16px;
  --radius-sm: 11px;
  --radius-lg: 24px;

  --shell: min(1200px, calc(100vw - 48px));

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-display: "Sora", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Manrope", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  font-family: var(--font-body);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

img,
svg {
  display: block;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--cyan-bright);
  outline-offset: 3px;
  border-radius: 6px;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
  text-wrap: balance;
}

/* Ambient page background ------------------------------------ */
.page-aura {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 50% at 78% 8%, rgba(33, 196, 255, 0.16), transparent 60%),
    radial-gradient(50% 55% at 12% 88%, rgba(10, 143, 224, 0.12), transparent 60%),
    var(--bg);
}

.page-aura::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 165, 215, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 165, 215, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(110% 70% at 50% 0%, #000 25%, transparent 75%);
}

/* Helpers ---------------------------------------------------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 1000;
  transform: translateY(-160%);
  border-radius: var(--radius-sm);
  background: var(--cyan);
  color: #00101d;
  padding: 10px 16px;
  font-weight: 700;
  transition: transform 200ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.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;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-bright);
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(33, 196, 255, 0.18);
  animation: pulse 2.6s var(--ease) infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(33, 196, 255, 0.35);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(33, 196, 255, 0);
  }
}

/* Header ----------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  transition: background 280ms var(--ease), border-color 280ms var(--ease),
    backdrop-filter 280ms var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(4, 7, 14, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--surface-line);
}

.nav-shell {
  width: var(--shell);
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: min-height 280ms var(--ease);
}

.site-header.is-scrolled .nav-shell {
  min-height: 66px;
}

.brand img {
  width: 116px;
  height: 50px;
  object-fit: contain;
  object-position: left center;
  transition: transform 240ms var(--ease);
}

.brand:hover img {
  transform: scale(1.03);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
}

.nav-links a {
  position: relative;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 2px;
  transition: color 180ms var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 100%;
  background: var(--cyan);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms var(--ease);
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.is-active {
  color: var(--ink);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after,
.nav-links a.is-active::after {
  transform: scaleX(1);
}

.nav-end {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons ---------------------------------------------------- */
.button,
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 200ms var(--ease), box-shadow 240ms var(--ease),
    background 200ms var(--ease), border-color 200ms var(--ease),
    color 200ms var(--ease);
}

.nav-cta {
  min-height: 44px;
  padding: 0 18px;
  font-size: 0.88rem;
  color: var(--ink);
  border-color: var(--surface-line-strong);
  background: var(--surface);
}

.nav-cta svg {
  width: 17px;
  height: 17px;
}

.nav-cta:hover,
.nav-cta:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-bright);
  transform: translateY(-2px);
}

.button svg {
  width: 19px;
  height: 19px;
  transition: transform 220ms var(--ease);
}

.button-primary {
  background: linear-gradient(135deg, var(--cyan-bright), var(--cyan-deep));
  color: #001220;
  box-shadow: 0 14px 36px rgba(10, 143, 224, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.button-primary:hover,
.button-primary:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 20px 48px rgba(33, 196, 255, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.button-primary:hover svg {
  transform: translateX(4px);
}

.button-ghost {
  color: var(--ink);
  border-color: var(--surface-line-strong);
  background: var(--surface);
  backdrop-filter: blur(8px);
}

.button-ghost:hover,
.button-ghost:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
  color: var(--cyan-bright);
}

.button-lg {
  min-height: 56px;
  padding: 0 30px;
  font-size: 1rem;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--surface-line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 180ms var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan);
}

.nav-toggle svg {
  width: 23px;
  height: 23px;
}

.nav-toggle svg,
.button svg,
.nav-cta svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Hero ------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--surface-line);
}

.hero-media {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(105deg, rgba(4, 7, 14, 0.97) 0%, rgba(4, 7, 14, 0.82) 38%, rgba(4, 7, 14, 0.28) 72%, rgba(4, 7, 14, 0.55) 100%),
    url("assets/cyber-operations-hero.png");
  background-size: cover;
  background-position: center right;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 30%;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(33, 196, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(33, 196, 255, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(70% 60% at 70% 50%, #000, transparent 80%);
  pointer-events: none;
}

.hero-shell {
  position: relative;
  z-index: 2;
  width: var(--shell);
  margin: 0 auto;
  padding: 140px 0 110px;
}

.hero-copy {
  max-width: 720px;
}

.hero h1 {
  margin: 22px 0 0;
  font-weight: 800;
  font-size: clamp(3rem, 6vw, 5.4rem);
  line-height: 0.98;
}

.hero h1 .grad {
  background: linear-gradient(120deg, var(--cyan-bright), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  margin: 22px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
  line-height: 1.2;
  color: var(--ink);
}

.hero-subcopy {
  max-width: 540px;
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.hero-scroll svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: bob 2s var(--ease) infinite;
}

@keyframes bob {
  0%,
  100% {
    transform: translateY(0);
    opacity: 0.7;
  }
  50% {
    transform: translateY(5px);
    opacity: 1;
  }
}

/* Marquee ---------------------------------------------------- */
.marquee {
  overflow: hidden;
  border-bottom: 1px solid var(--surface-line);
  background: var(--bg-2);
  padding: 18px 0;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 30px;
  width: max-content;
  animation: scroll-x 34s linear infinite;
}

.marquee-track span {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.marquee-track i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: 0.6;
  flex: none;
}

@keyframes scroll-x {
  to {
    transform: translateX(-50%);
  }
}

/* Sections --------------------------------------------------- */
.section-shell {
  width: var(--shell);
  margin: 0 auto;
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 18px;
  text-align: center;
}

.section-heading h2 {
  margin: 14px 0 0;
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.06;
}

.section-heading .eyebrow {
  justify-content: center;
}

.section-sub {
  margin: 16px auto 0;
  max-width: 600px;
  color: var(--ink-soft);
  font-size: 1.04rem;
}

.services,
.operations {
  padding: clamp(72px, 10vw, 120px) 0;
}

.operations {
  background:
    radial-gradient(60% 60% at 50% 0%, rgba(33, 196, 255, 0.07), transparent 70%),
    var(--bg-2);
  border-top: 1px solid var(--surface-line);
  border-bottom: 1px solid var(--surface-line);
}

/* Cards ------------------------------------------------------ */
.card {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--surface-line);
  background: var(--surface);
  overflow: hidden;
  transition: transform 320ms var(--ease), border-color 320ms var(--ease),
    box-shadow 320ms var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(33, 196, 255, 0.5), transparent 45%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 320ms var(--ease);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: 0 26px 60px rgba(0, 8, 22, 0.5);
}

.card:hover::before {
  opacity: 1;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: clamp(44px, 6vw, 64px);
}

.service-item {
  padding: 32px 28px 30px;
}

.card-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.service-icon,
.operation-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  margin: 18px 0 22px;
  border-radius: 14px;
  color: var(--cyan-bright);
  background: rgba(33, 196, 255, 0.1);
  border: 1px solid rgba(33, 196, 255, 0.22);
  transition: transform 320ms var(--ease), background 320ms var(--ease);
}

.card:hover .service-icon,
.card:hover .operation-icon {
  transform: scale(1.06);
  background: rgba(33, 196, 255, 0.18);
}

.service-icon svg,
.operation-icon svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-item h3,
.operation-item h3 {
  margin: 0 0 10px;
  font-size: 1.22rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
}

.service-item p,
.operation-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.operations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: clamp(44px, 6vw, 64px);
}

.operation-item {
  padding: 30px 26px;
}

.operation-icon {
  margin: 0 0 20px;
}

/* Contact ---------------------------------------------------- */
.contact {
  padding: clamp(72px, 10vw, 120px) 0;
}

.contact-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-line-strong);
  background: linear-gradient(155deg, rgba(20, 38, 62, 0.6), rgba(6, 11, 22, 0.85));
  padding: clamp(40px, 7vw, 80px);
  text-align: center;
}

.contact-glow {
  position: absolute;
  inset: -40% 20% auto;
  height: 360px;
  background: radial-gradient(circle, rgba(33, 196, 255, 0.32), transparent 65%);
  filter: blur(36px);
  pointer-events: none;
}

.contact-body {
  position: relative;
  max-width: 660px;
  margin: 0 auto;
}

.contact-body .eyebrow {
  justify-content: center;
}

.contact h2 {
  margin: 16px 0 0;
  font-weight: 700;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  line-height: 1.05;
}

.contact-body p {
  margin: 18px auto 0;
  max-width: 540px;
  color: var(--ink-soft);
  font-size: 1.06rem;
}

.contact .button {
  margin-top: 32px;
}

/* Footer ----------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--surface-line);
  background: #030610;
}

.footer-shell {
  width: var(--shell);
  margin: 0 auto;
  padding: 64px 0 44px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr;
  gap: 48px;
}

.footer-brand img {
  width: 130px;
  height: 56px;
  object-fit: contain;
  object-position: left center;
}

.footer-brand-block p {
  margin: 18px 0 0;
  max-width: 320px;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.footer-heading {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-nav a {
  width: fit-content;
  color: var(--ink-soft);
  font-weight: 500;
  transition: color 180ms var(--ease);
}

.footer-nav a:hover {
  color: var(--cyan-bright);
}

.footer-details p {
  margin: 0 0 8px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.footer-details a {
  color: var(--cyan-bright);
  font-weight: 600;
}

.footer-details a:hover {
  text-decoration: underline;
}

.footer-base {
  width: var(--shell);
  margin: 0 auto;
  padding: 22px 0 30px;
  border-top: 1px solid var(--surface-line);
  display: flex;
  justify-content: space-between;
  gap: 14px;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.footer-base p {
  margin: 0;
}

/* Reveal animation ------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* Responsive ------------------------------------------------- */
@media (max-width: 980px) {
  .hero-shell {
    padding: 128px 0 96px;
  }

  .service-list,
  .operations-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 82vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 104px 28px 40px;
    background: rgba(6, 11, 22, 0.97);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--surface-line);
    transform: translateX(100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 320ms var(--ease), opacity 320ms var(--ease);
  }

  .nav-links.is-open {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    padding: 18px 4px;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--surface-line);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 60;
  }
}

@media (max-width: 600px) {
  :root {
    --shell: min(100vw - 32px, 1200px);
  }

  .hero-shell {
    padding: 116px 0 80px;
  }

  .hero-media {
    background-image:
      linear-gradient(180deg, rgba(4, 7, 14, 0.92) 0%, rgba(4, 7, 14, 0.7) 55%, rgba(4, 7, 14, 0.6) 100%),
      url("assets/cyber-operations-hero.png");
    background-position: 64% center;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .service-list,
  .operations-grid {
    grid-template-columns: 1fr;
  }

  .footer-shell {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 52px 0 36px;
  }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-scroll {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}