/* ============================================================
   POSITRI LTD — Main Stylesheet
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@300;400;500&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Colors */
  --clr-bg:          #07070d;
  --clr-surface:     #0d0d18;
  --clr-surface-2:   #111122;
  --clr-surface-3:   #161628;
  --clr-border:      #1e1e35;
  --clr-border-2:    #252540;
  --clr-accent:      #4fc3f7;
  --clr-accent-dim:  rgba(79, 195, 247, 0.12);
  --clr-accent-glow: rgba(79, 195, 247, 0.06);
  --clr-text:        #e8e8f0;
  --clr-text-2:      #9999b5;
  --clr-text-3:      #5c5c7a;
  --clr-text-inv:    #07070d;
  --clr-white:       #ffffff;

  /* Typography */
  --font-sans:  'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:  'Inter', system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', 'Courier New', monospace;

  /* Spacing */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;
  --space-5xl:  8rem;

  /* Layout */
  --max-width:  1280px;
  --nav-height: 72px;

  /* Transitions */
  --ease:        cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out:    cubic-bezier(0.0, 0, 0.2, 1);
  --dur-fast:    150ms;
  --dur-mid:     300ms;
  --dur-slow:    600ms;

  /* Border Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

/* ── Utility Classes ──────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-accent);
  font-weight: 400;
}

.label--muted {
  color: var(--clr-text-3);
}

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--clr-white);
}

.heading-xl {
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.heading-lg {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.heading-md {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.heading-sm {
  font-size: clamp(1.125rem, 1.5vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.body-lg {
  font-size: clamp(1rem, 1.25vw, 1.175rem);
  line-height: 1.7;
  color: var(--clr-text-2);
  font-weight: 400;
}

.body-md {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--clr-text-2);
}

.body-sm {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--clr-text-3);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--clr-text-3);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--dur-mid) var(--ease);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--clr-accent);
  color: var(--clr-text-inv);
}

.btn--primary:hover {
  background: #81d4fa;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(79, 195, 247, 0.25);
}

.btn--ghost {
  border: 1px solid var(--clr-border-2);
  color: var(--clr-text);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ── Focus Styles ─────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── Loader ───────────────────────────────────────────────── */
#loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--clr-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#loader canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.35;
}

.loader__inner {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
}

.loader__wordmark {
  font-family: var(--font-sans);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--clr-white);
  opacity: 0;
  animation: loaderFadeIn 0.8s var(--ease) 0.3s forwards;
}

.loader__progress-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  opacity: 0;
  animation: loaderFadeIn 0.6s var(--ease) 0.7s forwards;
}

.loader__percent {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--clr-text-3);
}

.loader__bar-track {
  width: 240px;
  height: 1px;
  background: var(--clr-border);
  position: relative;
  overflow: hidden;
}

.loader__bar-fill {
  position: absolute;
  left: 0; top: 0;
  height: 100%;
  width: 0%;
  background: var(--clr-accent);
  transition: width 0.1s linear;
  box-shadow: 0 0 12px rgba(79, 195, 247, 0.6);
}

.loader__status {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  min-height: 1.2em;
}

.loader--fade-out {
  animation: loaderFadeOut 0.7s var(--ease) forwards;
}

@keyframes loaderFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes loaderFadeOut {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(1.015); pointer-events: none; }
}

/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--dur-mid) var(--ease),
              border-color var(--dur-mid) var(--ease),
              backdrop-filter var(--dur-mid) var(--ease);
}

.nav--scrolled {
  background: rgba(7, 7, 13, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--clr-white);
  text-transform: uppercase;
  transition: color var(--dur-fast);
}

.nav__logo:hover { color: var(--clr-accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav__link {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--clr-text-2);
  text-transform: uppercase;
  transition: color var(--dur-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--clr-accent);
  transition: width var(--dur-mid) var(--ease);
}

.nav__link:hover,
.nav__link.active {
  color: var(--clr-accent);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__cta {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--clr-accent);
  border: 1px solid rgba(79, 195, 247, 0.3);
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-md);
  transition: all var(--dur-mid) var(--ease);
}

.nav__cta:hover {
  background: var(--clr-accent-dim);
  border-color: var(--clr-accent);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  width: 36px;
  height: 32px;
  justify-content: center;
}

.nav__hamburger span {
  display: block;
  height: 1.5px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: all var(--dur-mid) var(--ease);
}

.nav__hamburger span:nth-child(1) { width: 100%; }
.nav__hamburger span:nth-child(2) { width: 70%; }
.nav__hamburger span:nth-child(3) { width: 85%; }

.nav__hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 5px);
  width: 100%;
}
.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -5px);
  width: 100%;
}

/* Mobile Menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(7, 7, 13, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 99;
  padding: var(--space-3xl) var(--space-xl);
  flex-direction: column;
  gap: var(--space-2xl);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease);
}

.nav__mobile.open {
  transform: translateX(0);
}

.nav__mobile-link {
  font-family: var(--font-sans);
  font-size: 2rem;
  font-weight: 600;
  color: var(--clr-text-2);
  letter-spacing: -0.02em;
  transition: color var(--dur-fast);
}

.nav__mobile-link:hover { color: var(--clr-accent); }

.nav__mobile-divider {
  width: 40px;
  height: 1px;
  background: var(--clr-border-2);
}

.nav__mobile-contact {
  margin-top: auto;
}

.nav__mobile-contact p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clr-text-3);
  letter-spacing: 0.05em;
}

/* ── Page Transition Overlay ──────────────────────────────── */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--clr-bg);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* ── Scroll Reveal ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal--left {
  opacity: 0;
  transform: translateX(-28px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
}

.reveal--right {
  opacity: 0;
  transform: translateX(28px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
}

.reveal--left.revealed,
.reveal--right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger delays */
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }
.reveal[data-delay="5"] { transition-delay: 0.5s; }
.reveal[data-delay="6"] { transition-delay: 0.6s; }
.reveal--left[data-delay="1"],
.reveal--right[data-delay="1"] { transition-delay: 0.1s; }
.reveal--left[data-delay="2"],
.reveal--right[data-delay="2"] { transition-delay: 0.2s; }
.reveal--left[data-delay="3"],
.reveal--right[data-delay="3"] { transition-delay: 0.3s; }

/* ── Section Layout ───────────────────────────────────────── */
.section {
  padding-block: var(--space-5xl);
}

.section--sm {
  padding-block: var(--space-4xl);
}

.section--lg {
  padding-block: clamp(5rem, 10vw, 9rem);
}

.section__header {
  margin-bottom: var(--space-3xl);
}

.section__header--center {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-3xl);
}

.section__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.section__eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--clr-accent);
  flex-shrink: 0;
}

.section__eyebrow--center {
  justify-content: center;
}

.section__eyebrow--center::before {
  display: none;
}

/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 65% 50%, rgba(79, 195, 247, 0.04) 0%, transparent 70%),
              radial-gradient(ellipse 80% 50% at 50% 100%, rgba(7, 7, 13, 0.9) 0%, transparent 60%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
  padding-block: var(--space-5xl);
  max-width: 820px;
}

.hero__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeSlideUp 0.8s var(--ease) 0.2s forwards;
}

.hero__label-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero__title {
  font-family: var(--font-sans);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.0;
  color: var(--clr-white);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeSlideUp 0.9s var(--ease) 0.4s forwards;
}

.hero__title em {
  font-style: normal;
  color: var(--clr-accent);
}

.hero__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.175rem);
  line-height: 1.7;
  color: var(--clr-text-2);
  max-width: 560px;
  margin-bottom: var(--space-2xl);
  opacity: 0;
  animation: fadeSlideUp 0.9s var(--ease) 0.6s forwards;
  font-weight: 400;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeSlideUp 0.9s var(--ease) 0.8s forwards;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  opacity: 0;
  animation: fadeSlideUp 0.9s var(--ease) 1.2s forwards;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--clr-accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); opacity: 0.6; }
  50% { transform: scaleY(1.3); opacity: 1; }
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Company Intro ────────────────────────────────────────── */
.intro {
  position: relative;
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.intro__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5xl);
  align-items: center;
}

.intro__stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--clr-border);
}

.intro__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.intro__stat-value {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--clr-white);
  letter-spacing: -0.03em;
}

.intro__stat-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

.intro__visual {
  position: relative;
  height: 400px;
}

/* ── What We Do ───────────────────────────────────────────── */
.whatwedo__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.whatwedo__item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: border-color var(--dur-mid) var(--ease),
              transform var(--dur-mid) var(--ease);
}

.whatwedo__item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease);
}

.whatwedo__item:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-3px);
}

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

.whatwedo__number {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  color: var(--clr-accent);
  margin-bottom: var(--space-xl);
  display: block;
}

.whatwedo__icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-lg);
  color: var(--clr-accent);
  opacity: 0.8;
}

.whatwedo__title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--clr-white);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.whatwedo__body {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--clr-text-2);
}

/* ── Services Section ─────────────────────────────────────── */
.services {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.service-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: border-color var(--dur-mid) var(--ease),
              background var(--dur-mid) var(--ease),
              transform var(--dur-mid) var(--ease);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--clr-accent);
  transition: width var(--dur-slow) var(--ease);
}

.service-card:hover {
  border-color: var(--clr-border-2);
  background: var(--clr-surface-2);
  transform: translateY(-4px);
}

.service-card:hover::after {
  width: 100%;
}

.service-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
  flex-shrink: 0;
}

.service-card__icon svg {
  width: 20px;
  height: 20px;
}

.service-card__title {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--clr-white);
  letter-spacing: -0.015em;
}

.service-card__body {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--clr-text-2);
  flex: 1;
}

.service-card__more {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  transition: gap var(--dur-fast);
}

.service-card:hover .service-card__more {
  gap: var(--space-md);
}

/* ── Tech Focus ───────────────────────────────────────────── */
.tech-focus {
  position: relative;
  overflow: hidden;
}

.tech-focus__grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: var(--space-5xl);
  align-items: center;
}

.tech-focus__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  border: 1px solid var(--clr-border);
  padding: 0.375rem 0.875rem;
  border-radius: 100px;
  transition: all var(--dur-mid) var(--ease);
}

.tech-tag:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
}

.tech-focus__canvas {
  width: 100%;
  aspect-ratio: 1;
  max-width: 420px;
}

/* ── Signature Visual ─────────────────────────────────────── */
.signature {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  overflow: hidden;
}

.signature__inner {
  text-align: center;
}

.signature__headline {
  margin-bottom: var(--space-3xl);
}

.signature__flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin-bottom: var(--space-4xl);
}

.signature__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.signature__node-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--clr-accent);
  position: relative;
}

.signature__node-dot::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(79, 195, 247, 0.2);
  animation: nodePulse 2.5s ease-in-out infinite;
}

@keyframes nodePulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.5); opacity: 0; }
}

.signature__node-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

.signature__connector {
  width: 80px;
  height: 1px;
  background: linear-gradient(90deg, var(--clr-accent), rgba(79,195,247,0.2));
  position: relative;
  flex-shrink: 0;
  margin-bottom: 14px;
}

.signature__connector::after {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 5px;
  height: 5px;
  background: var(--clr-accent);
  border-radius: 50%;
  animation: connectorTravel 2s ease-in-out infinite;
}

@keyframes connectorTravel {
  0% { left: 0; opacity: 1; }
  100% { left: calc(100% - 5px); opacity: 0; }
}

.signature__canvas-wrap {
  width: 100%;
  max-width: 900px;
  margin-inline: auto;
  height: 260px;
  position: relative;
}

.signature__canvas-wrap canvas {
  width: 100%;
  height: 100%;
}

/* ── Principles ───────────────────────────────────────────── */
.principles__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.principle-item {
  border-left: 1px solid var(--clr-border);
  padding-left: var(--space-xl);
  padding-block: var(--space-md);
  transition: border-color var(--dur-mid) var(--ease);
}

.principle-item:hover {
  border-color: var(--clr-accent);
}

.principle-item__number {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  color: var(--clr-accent);
  margin-bottom: var(--space-md);
}

.principle-item__title {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.principle-item__body {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--clr-text-2);
}

/* ── Capabilities ─────────────────────────────────────────── */
.capabilities {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
}

.capabilities__layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: var(--space-5xl);
  align-items: start;
}

.capabilities__sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}

.capabilities__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.capability-item {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--clr-border);
  cursor: default;
  transition: all var(--dur-mid) var(--ease);
}

.capability-item:hover .capability-item__name {
  color: var(--clr-accent);
}

.capability-item__num {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--clr-text-3);
  letter-spacing: 0.1em;
  min-width: 24px;
}

.capability-item__name {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--clr-text-2);
  letter-spacing: -0.01em;
  transition: color var(--dur-fast);
}

.capabilities__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.capability-block {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  background: var(--clr-bg);
  transition: border-color var(--dur-mid) var(--ease);
}

.capability-block:hover {
  border-color: var(--clr-border-2);
}

.capability-block__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-accent);
  border: 1px solid rgba(79, 195, 247, 0.2);
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
  margin-bottom: var(--space-lg);
}

.capability-block__title {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.capability-block__body {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--clr-text-2);
}

/* ── Why Positri ──────────────────────────────────────────── */
.why-positri__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.why-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: border-color var(--dur-mid) var(--ease),
              transform var(--dur-mid) var(--ease);
}

.why-item:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-2px);
}

.why-item__icon {
  width: 36px;
  height: 36px;
  color: var(--clr-accent);
  margin-bottom: var(--space-lg);
  opacity: 0.75;
}

.why-item__title {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.why-item__body {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--clr-text-2);
}

/* ── CTA Section ──────────────────────────────────────────── */
.cta-section {
  position: relative;
  overflow: hidden;
}

.cta-section__inner {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}

.cta-section__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 80% at 50% 50%, rgba(79, 195, 247, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-2xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid var(--clr-border);
  margin-bottom: var(--space-xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer__logo {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--clr-white);
  text-transform: uppercase;
}

.footer__tagline {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

.footer__company-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--clr-text-3);
  margin-top: auto;
}

.footer__col-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-text-2);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer__link {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  transition: color var(--dur-fast);
}

.footer__link:hover {
  color: var(--clr-accent);
}

.footer__contact-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.footer__contact-label {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

.footer__contact-value {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  transition: color var(--dur-fast);
}

a.footer__contact-value:hover {
  color: var(--clr-accent);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer__copyright {
  font-size: 0.8125rem;
  color: var(--clr-text-3);
}

.footer__legal {
  display: flex;
  gap: var(--space-lg);
}

.footer__legal-link {
  font-size: 0.8125rem;
  color: var(--clr-text-3);
  transition: color var(--dur-fast);
}

.footer__legal-link:hover {
  color: var(--clr-text-2);
}

/* ── Page Hero ────────────────────────────────────────────── */
.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-4xl));
  padding-bottom: var(--space-4xl);
  position: relative;
  border-bottom: 1px solid var(--clr-border);
  overflow: hidden;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 40% 60% at 60% 50%, rgba(79, 195, 247, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__label {
  margin-bottom: var(--space-lg);
}

.page-hero__title {
  margin-bottom: var(--space-lg);
}

.page-hero__subtitle {
  max-width: 560px;
}

/* ── About: Who We Are ────────────────────────────────────── */
.about-intro__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5xl);
  align-items: start;
}

.about-intro__body p + p {
  margin-top: var(--space-lg);
}

/* ── About: Company Info ──────────────────────────────────── */
.company-info {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.company-info__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5xl);
  align-items: start;
}

.info-table {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.info-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-lg);
  padding-block: var(--space-lg);
  border-bottom: 1px solid var(--clr-border);
}

.info-row:first-child {
  border-top: 1px solid var(--clr-border);
}

.info-key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  padding-top: 2px;
}

.info-value {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.5;
}

/* ── Services Detail ──────────────────────────────────────── */
.service-detail {
  border-bottom: 1px solid var(--clr-border);
}

.service-detail:nth-child(even) {
  background: var(--clr-surface);
}

.service-detail__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5xl);
  align-items: center;
}

.service-detail__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.service-detail__icon-wrap {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
}

.service-detail__icon-wrap svg {
  width: 24px;
  height: 24px;
}

.service-detail__focus {
  margin-top: var(--space-md);
}

.service-detail__focus-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--space-md);
}

.service-detail__focus-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.service-detail__focus-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.9rem;
  color: var(--clr-text-2);
}

.service-detail__focus-item::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--clr-accent);
  flex-shrink: 0;
}

.service-detail__visual {
  height: 340px;
  position: relative;
}

/* ── Contact Page ─────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.contact-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: border-color var(--dur-mid) var(--ease),
              transform var(--dur-mid) var(--ease);
}

.contact-card:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-2px);
}

.contact-card__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

.contact-card__value {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--clr-white);
  letter-spacing: -0.01em;
  transition: color var(--dur-fast);
}

a.contact-card__value:hover {
  color: var(--clr-accent);
}

.contact-card__icon {
  width: 44px;
  height: 44px;
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
  margin-bottom: var(--space-sm);
}

.contact-card__icon svg {
  width: 20px;
  height: 20px;
}

.contact-address {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--clr-text-2);
}

/* ── Legal Pages ──────────────────────────────────────────── */
.legal-content {
  max-width: 760px;
}

.legal-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-md);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--clr-text-2);
  margin-bottom: var(--space-md);
}

.legal-content ul {
  list-style: none;
  margin-bottom: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.legal-content ul li {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--clr-text-2);
  padding-left: var(--space-lg);
  position: relative;
}

.legal-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--clr-accent);
  opacity: 0.6;
}

.legal-content a {
  color: var(--clr-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal-content a:hover {
  text-decoration: none;
}

.legal-meta {
  display: flex;
  gap: var(--space-2xl);
  padding: var(--space-xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.legal-meta__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.legal-meta__label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-text-3);
}

.legal-meta__value {
  font-size: 0.875rem;
  color: var(--clr-text-2);
}

/* ── SVG Network Visuals ──────────────────────────────────── */
.network-visual {
  width: 100%;
  height: 100%;
}

/* ── Reduced Motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }

  .reveal,
  .reveal--left,
  .reveal--right {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1100px) {
  .capabilities__layout {
    grid-template-columns: 300px 1fr;
    gap: var(--space-3xl);
  }

  .tech-focus__grid {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .tech-focus__canvas {
    max-width: 320px;
    margin-inline: auto;
  }
}

@media (max-width: 960px) {
  :root { --nav-height: 64px; }

  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile {
    display: flex;
  }

  .intro__grid,
  .about-intro__grid,
  .company-info__grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .intro__visual { height: 280px; }

  .whatwedo__grid,
  .principles__grid,
  .why-positri__grid {
    grid-template-columns: 1fr;
  }

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

  .capabilities__layout {
    grid-template-columns: 1fr;
  }

  .capabilities__sidebar {
    position: static;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .service-detail__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .service-detail:nth-child(odd) .service-detail__grid {
    direction: ltr;
  }

  .service-detail__visual { height: 240px; }

  .signature__flow {
    gap: var(--space-xl);
  }

  .signature__connector {
    display: none;
  }
}

@media (max-width: 640px) {
  .container { padding-inline: var(--space-lg); }

  .section { padding-block: var(--space-4xl); }

  .principles-layout {
    grid-template-columns: 1fr !important;
    gap: var(--space-3xl) !important;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

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

  .info-row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .legal-meta {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .signature__flow {
    flex-direction: column;
    align-items: center;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Dark border glow effect on selected elements ─────────── */
.border-glow {
  box-shadow: 0 0 0 1px var(--clr-border), 0 0 20px rgba(79, 195, 247, 0.03);
}

/* ── Divider line ─────────────────────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: var(--clr-border);
  margin-block: var(--space-2xl);
}

/* ── Text accent ──────────────────────────────────────────── */
.text-accent { color: var(--clr-accent); }
.text-muted  { color: var(--clr-text-3); }
.text-light  { color: var(--clr-text-2); }
.text-white  { color: var(--clr-white); }

/* ── Grid background overlay ──────────────────────────────── */
.bg-grid {
  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: 60px 60px;
}