/* ═══════════════════════════════════════════════════════
   ENFOCO Technology — Design System & Styles
   ═══════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties (Design Tokens) ─── */
:root {
  /* Colors */
  --color-dark-carbon: #1A1A1A;
  --color-graphite: #222222;
  --color-graphite-light: #2A2A2A;
  --color-aluminium: #8E8E93;
  --color-off-white: #E5E5DC;
  --color-white: #F5F5F0;
  --color-pure-white: #FFFFFF;

  /* Typography */
  --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Type Scale */
  --text-xs: clamp(0.625rem, 0.55rem + 0.2vw, 0.75rem);
  --text-sm: clamp(0.75rem, 0.7rem + 0.15vw, 0.875rem);
  --text-base: clamp(0.875rem, 0.8rem + 0.2vw, 1rem);
  --text-lg: clamp(1rem, 0.9rem + 0.3vw, 1.25rem);
  --text-xl: clamp(1.125rem, 1rem + 0.4vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 0.8vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.4rem + 1.2vw, 2.75rem);
  --text-4xl: clamp(2.25rem, 1.6rem + 1.8vw, 3.75rem);
  --text-5xl: clamp(2.75rem, 1.8rem + 2.5vw, 5rem);
  --text-6xl: clamp(3.5rem, 2rem + 4vw, 7rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-48: 12rem;

  /* Layout */
  --max-width: 1280px;
  --gutter: clamp(1.5rem, 3vw, 4rem);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 800ms;

  /* Z-index */
  --z-nav: 100;
  --z-mobile-menu: 90;
  --z-canvas: 1;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-off-white);
  background-color: var(--color-dark-carbon);
  overflow-x: hidden;
}

::selection {
  background-color: rgba(142, 142, 147, 0.3);
  color: var(--color-off-white);
}

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

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

button {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font: inherit;
}

/* ─── Utilities ─── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

/* ─── Section Base ─── */
.section {
  padding: var(--space-32) 0;
  position: relative;
}

.section__header {
  margin-bottom: var(--space-16);
}

.section__header--centered {
  text-align: center;
}

.section__label {
  display: block;
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-aluminium);
  margin-bottom: var(--space-6);
}

.section__title {
  font-family: var(--font-primary);
  font-size: var(--text-4xl);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-off-white);
  max-width: 18ch;
}

.section__title--large {
  font-size: var(--text-5xl);
}

.section__header--centered .section__title {
  margin: 0 auto;
}

.section__description {
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-aluminium);
  max-width: 52ch;
  margin-top: var(--space-6);
}

/* ═══════════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: rgba(26, 26, 26, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(142, 142, 147, 0.08);
  transition: background-color var(--duration-normal) var(--ease-out);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 64px;
}

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

.nav__logo-mark {
  font-family: var(--font-primary);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-off-white);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.nav__link {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-aluminium);
  letter-spacing: 0.01em;
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-off-white);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover {
  color: var(--color-off-white);
}

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

.nav__cta {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-off-white);
  padding: var(--space-2) var(--space-6);
  border: 1px solid rgba(142, 142, 147, 0.2);
  border-radius: 4px;
  transition: all var(--duration-fast) var(--ease-out);
  letter-spacing: 0.01em;
}

.nav__cta:hover {
  border-color: rgba(142, 142, 147, 0.5);
  background-color: rgba(142, 142, 147, 0.06);
}

/* Mobile Toggle */
.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.nav__mobile-line {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--color-off-white);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

.nav__mobile-toggle[aria-expanded="true"] .nav__mobile-line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav__mobile-toggle[aria-expanded="true"] .nav__mobile-line:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* Mobile Menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(26, 26, 26, 0.98);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  z-index: var(--z-mobile-menu);
  flex-direction: column;
  align-items: flex-start;
  padding: var(--space-12) var(--gutter);
  gap: var(--space-8);
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.nav__mobile-menu.is-open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile-link {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-off-white);
  letter-spacing: -0.01em;
}

.nav__mobile-link--cta {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  color: var(--color-aluminium);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(142, 142, 147, 0.3);
}

/* ═══════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-32) var(--gutter);
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-canvas);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}

.hero__brand {
  margin-bottom: var(--space-12);
}

.hero__logo {
  font-family: var(--font-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--color-aluminium);
  margin-bottom: var(--space-2);
}

.hero__tagline {
  display: block;
  font-family: var(--font-secondary);
  font-size: 0.625rem;
  font-weight: 300;
  letter-spacing: 0.5em;
  color: var(--color-aluminium);
  opacity: 0.6;
}

.hero__headline {
  font-family: var(--font-primary);
  font-size: var(--text-6xl);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-off-white);
  margin-bottom: var(--space-8);
}

.hero__subheadline {
  font-family: var(--font-secondary);
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-aluminium);
  max-width: 52ch;
  margin: 0 auto var(--space-12);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

/* Scroll Indicator */
.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-aluminium), transparent);
  animation: scrollPulse 2s var(--ease-in-out) infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 0.8; transform: scaleY(1.2); }
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.02em;
  padding: var(--space-3) var(--space-8);
  border-radius: 4px;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-off-white);
  color: var(--color-dark-carbon);
  border: 1px solid transparent;
}

.btn--primary:hover {
  background-color: var(--color-pure-white);
  transform: translateY(-1px);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-off-white);
  border: 1px solid rgba(142, 142, 147, 0.25);
}

.btn--secondary:hover {
  border-color: rgba(142, 142, 147, 0.5);
  background-color: rgba(142, 142, 147, 0.06);
  transform: translateY(-1px);
}

.btn--large {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-base);
}

/* ═══════════════════════════════════════════════════════
   PRODUCTS
   ═══════════════════════════════════════════════════════ */
.section--products {
  background-color: var(--color-dark-carbon);
  border-top: 1px solid rgba(142, 142, 147, 0.06);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: rgba(142, 142, 147, 0.08);
  border: 1px solid rgba(142, 142, 147, 0.08);
}

.product-card {
  background-color: var(--color-dark-carbon);
  padding: var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
  transition: background-color var(--duration-slow) var(--ease-out);
}

.product-card:hover {
  background-color: var(--color-graphite);
}

.product-card__visual {
  width: 100%;
  aspect-ratio: 5 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card__diagram {
  width: 100%;
  max-width: 200px;
  height: auto;
  opacity: 0.7;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.product-card:hover .product-card__diagram {
  opacity: 1;
}

.product-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.product-card__label {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-aluminium);
}

.product-card__title {
  font-family: var(--font-primary);
  font-size: var(--text-xl);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-off-white);
}

.product-card__text {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-aluminium);
  max-width: 36ch;
}

/* ═══════════════════════════════════════════════════════
   ARCHITECTURE
   ═══════════════════════════════════════════════════════ */
.section--architecture {
  background-color: var(--color-graphite);
  border-top: 1px solid rgba(142, 142, 147, 0.06);
}

.architecture__flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  max-width: 400px;
  margin: 0 auto;
}

.architecture__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-6) var(--space-10);
  border: 1px solid rgba(142, 142, 147, 0.12);
  border-radius: 2px;
  width: 100%;
  text-align: center;
  background-color: rgba(26, 26, 26, 0.5);
  transition: all var(--duration-normal) var(--ease-out);
}

.architecture__node:hover {
  border-color: rgba(142, 142, 147, 0.3);
  background-color: rgba(26, 26, 26, 0.8);
  transform: translateY(-2px);
}

.architecture__node--final {
  border-color: rgba(142, 142, 147, 0.25);
}

.architecture__node-label {
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-off-white);
}

.architecture__node-desc {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 300;
  color: var(--color-aluminium);
  letter-spacing: 0.03em;
}

.architecture__connector {
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.architecture__line {
  width: 2px;
  height: 100%;
}

/* ═══════════════════════════════════════════════════════
   PRINCIPLES (WHY ENFOCO)
   ═══════════════════════════════════════════════════════ */
.section--principles {
  background-color: var(--color-dark-carbon);
  padding: var(--space-40) 0;
  border-top: 1px solid rgba(142, 142, 147, 0.06);
}

.principles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: rgba(142, 142, 147, 0.08);
  border-top: 1px solid rgba(142, 142, 147, 0.08);
}

.principle {
  background-color: var(--color-dark-carbon);
  padding: var(--space-12) var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.principle__number {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-aluminium);
  opacity: 0.5;
}

.principle__title {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-off-white);
}

.principle__text {
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-aluminium);
  max-width: 30ch;
}

/* ═══════════════════════════════════════════════════════
   CASE STUDIES
   ═══════════════════════════════════════════════════════ */
.section--cases {
  background-color: var(--color-dark-carbon);
  border-top: 1px solid rgba(142, 142, 147, 0.06);
}

.cases__list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background-color: rgba(142, 142, 147, 0.08);
  border: 1px solid rgba(142, 142, 147, 0.08);
}

.case {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background-color: var(--color-dark-carbon);
  transition: background-color var(--duration-slow) var(--ease-out);
}

.case:hover {
  background-color: var(--color-graphite);
}

.case__visual {
  padding: var(--space-12);
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid rgba(142, 142, 147, 0.08);
}

.case__diagram {
  width: 100%;
  max-width: 500px;
  height: auto;
  opacity: 0.5;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.case:hover .case__diagram {
  opacity: 0.8;
}

.case__content {
  padding: var(--space-12);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-4);
}

.case__number {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-aluminium);
  opacity: 0.5;
}

.case__title {
  font-family: var(--font-primary);
  font-size: var(--text-xl);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-off-white);
}

.case__description {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-aluminium);
  max-width: 44ch;
}

.case__tags {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.case__tag {
  font-family: var(--font-secondary);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-aluminium);
  padding: var(--space-1) var(--space-3);
  border: 1px solid rgba(142, 142, 147, 0.15);
  border-radius: 2px;
}

.case__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-off-white);
  margin-top: var(--space-4);
  transition: gap var(--duration-fast) var(--ease-out);
}

.case__link:hover {
  gap: var(--space-4);
}

.case__arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.case__link:hover .case__arrow {
  transform: translateX(4px);
}

/* ═══════════════════════════════════════════════════════
   METRICS
   ═══════════════════════════════════════════════════════ */
.section--metrics {
  background-color: var(--color-graphite);
  padding: var(--space-20) 0;
  border-top: 1px solid rgba(142, 142, 147, 0.06);
  border-bottom: 1px solid rgba(142, 142, 147, 0.06);
}

.metrics__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-16);
  text-align: center;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.metric__value {
  font-family: var(--font-primary);
  font-size: var(--text-4xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-off-white);
}

.metric__label {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--color-aluminium);
  letter-spacing: 0.02em;
}

/* ═══════════════════════════════════════════════════════
   TECHNOLOGY (Systems)
   ═══════════════════════════════════════════════════════ */
.section--tech {
  background-color: var(--color-dark-carbon);
}

.tech__flow {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.tech__pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-10) var(--space-8);
  border: 1px solid rgba(142, 142, 147, 0.1);
  border-radius: 2px;
  background-color: rgba(34, 34, 34, 0.5);
  overflow-x: auto;
}

.tech__stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  min-width: 80px;
}

.tech__stage-label {
  font-family: var(--font-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-off-white);
}

.tech__stage-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-aluminium);
  opacity: 0.5;
  animation: indicatorPulse 3s var(--ease-in-out) infinite;
}

.tech__stage:nth-child(1) .tech__stage-indicator { animation-delay: 0s; }
.tech__stage:nth-child(3) .tech__stage-indicator { animation-delay: 0.4s; }
.tech__stage:nth-child(5) .tech__stage-indicator { animation-delay: 0.8s; }
.tech__stage:nth-child(7) .tech__stage-indicator { animation-delay: 1.2s; }
.tech__stage:nth-child(9) .tech__stage-indicator { animation-delay: 1.6s; }

@keyframes indicatorPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.tech__arrow {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  color: var(--color-aluminium);
  opacity: 0.4;
  flex-shrink: 0;
}

.tech__details {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: rgba(142, 142, 147, 0.08);
  border: 1px solid rgba(142, 142, 147, 0.08);
}

.tech__detail-row {
  background-color: var(--color-dark-carbon);
  padding: var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.tech__detail-label {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-aluminium);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tech__detail-value {
  font-family: var(--font-primary);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-off-white);
  letter-spacing: -0.01em;
}

/* ═══════════════════════════════════════════════════════
   COMPANY
   ═══════════════════════════════════════════════════════ */
.section--company {
  background-color: var(--color-graphite);
  padding: var(--space-40) 0;
  border-top: 1px solid rgba(142, 142, 147, 0.06);
}

.company__content {
  max-width: 700px;
}

.company__text {
  font-family: var(--font-secondary);
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-aluminium);
  margin-top: var(--space-8);
  max-width: 52ch;
}

/* ═══════════════════════════════════════════════════════
   CTA
   ═══════════════════════════════════════════════════════ */
.section--cta {
  background-color: var(--color-dark-carbon);
  padding: var(--space-40) 0;
  text-align: center;
  border-top: 1px solid rgba(142, 142, 147, 0.06);
}

.cta__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.cta__title {
  font-family: var(--font-primary);
  font-size: var(--text-5xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-off-white);
}

.cta__text {
  font-family: var(--font-secondary);
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--color-aluminium);
  margin-bottom: var(--space-4);
}

/* ═══════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════ */
.footer {
  background-color: var(--color-dark-carbon);
  padding: var(--space-16) 0 var(--space-10);
  border-top: 1px solid rgba(142, 142, 147, 0.08);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-16);
  align-items: start;
  padding-bottom: var(--space-16);
  border-bottom: 1px solid rgba(142, 142, 147, 0.06);
}

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

.footer__logo {
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-off-white);
}

.footer__tagline {
  font-family: var(--font-secondary);
  font-size: 0.5625rem;
  font-weight: 300;
  letter-spacing: 0.45em;
  color: var(--color-aluminium);
  opacity: 0.5;
}

.footer__nav {
  display: flex;
  gap: var(--space-16);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__link {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-aluminium);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
  color: var(--color-off-white);
}

.footer__location {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__location-item {
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--color-aluminium);
}

.footer__location-separator {
  color: rgba(142, 142, 147, 0.3);
}

.footer__bottom {
  padding-top: var(--space-8);
}

.footer__copy {
  font-family: var(--font-secondary);
  font-size: var(--text-xs);
  font-weight: 300;
  color: var(--color-aluminium);
  opacity: 0.5;
}

/* ═══════════════════════════════════════════════════════
   SCROLL ANIMATIONS (reveal on scroll)
   ═══════════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 100ms; }
.reveal--delay-2 { transition-delay: 200ms; }
.reveal--delay-3 { transition-delay: 300ms; }
.reveal--delay-4 { transition-delay: 400ms; }

/* ═══════════════════════════════════════════════════════
   RESPONSIVE — COMPREHENSIVE MOBILE EXPERIENCE
   ═══════════════════════════════════════════════════════ */

/* ─── Large Tablet (max-width: 1024px) ─── */
@media (max-width: 1024px) {
  .products__grid {
    grid-template-columns: 1fr 1fr;
  }

  .principles__grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .principle {
    border-bottom: 1px solid rgba(142, 142, 147, 0.08);
    padding: var(--space-10) var(--space-8);
  }

  .principle:last-child {
    border-bottom: none;
  }

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

  .metrics__grid {
    gap: var(--space-8);
  }

  .footer__grid {
    grid-template-columns: 1fr auto;
    gap: var(--space-10);
  }

  .footer__location {
    grid-column: 1 / -1;
  }

  .section__title {
    max-width: 16ch;
  }

  .case__description {
    max-width: 38ch;
  }
}

/* ─── Tablet / Small Tablet (max-width: 768px) ─── */
@media (max-width: 768px) {
  /* Sections — reduced vertical rhythm */
  .section {
    padding: var(--space-20) 0;
  }

  .section--principles,
  .section--company,
  .section--cta {
    padding: var(--space-24) 0;
  }

  .section__header {
    margin-bottom: var(--space-10);
  }

  .section__title {
    max-width: 100%;
  }

  /* ── Navigation ── */
  .nav__links {
    display: none;
  }

  .nav__cta {
    display: none;
  }

  .nav__mobile-toggle {
    display: flex;
  }

  .nav__container {
    height: 56px;
  }

  /* ── Mobile Menu — full experience ── */
  .nav__mobile-menu {
    top: 56px;
    padding: var(--space-16) var(--gutter) var(--space-10);
    gap: 0;
  }

  .nav__mobile-link {
    font-size: var(--text-3xl);
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--color-aluminium);
    padding: var(--space-6) 0;
    border-bottom: 1px solid rgba(142, 142, 147, 0.06);
    display: block;
    width: 100%;
    transition: color var(--duration-fast) var(--ease-out),
                padding-left var(--duration-fast) var(--ease-out);
  }

  .nav__mobile-link:last-child {
    border-bottom: none;
  }

  .nav__mobile-link:active {
    color: var(--color-off-white);
    padding-left: var(--space-4);
  }

  .nav__mobile-link--cta {
    margin-top: var(--space-10);
    font-size: var(--text-base);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-off-white);
    border-bottom: none;
    padding: var(--space-4) var(--space-8);
    border: 1px solid rgba(142, 142, 147, 0.2);
    border-radius: 4px;
    text-align: center;
    width: auto;
    align-self: flex-start;
  }

  /* ── Hero — Mobile First Impression ── */
  .hero {
    padding: var(--space-32) var(--gutter) var(--space-16);
    min-height: 100svh;
    min-height: -webkit-fill-available;
    align-items: flex-end;
    justify-content: flex-end;
  }

  .hero__content {
    text-align: left;
    max-width: 100%;
  }

  .hero__brand {
    margin-bottom: var(--space-8);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__logo {
    font-size: var(--text-xs);
    letter-spacing: 0.3em;
  }

  .hero__tagline {
    font-size: 0.5625rem;
    letter-spacing: 0.4em;
  }

  .hero__headline {
    font-size: var(--text-4xl);
    line-height: 1.08;
    letter-spacing: -0.025em;
  }

  .hero__headline br {
    display: none;
  }

  .hero__subheadline {
    font-size: var(--text-base);
    line-height: 1.6;
    max-width: 100%;
    margin: 0 0 var(--space-10);
  }

  .hero__actions {
    flex-direction: column;
    gap: var(--space-4);
    align-items: flex-start;
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 300px;
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    min-height: 48px;
  }

  .hero__scroll-indicator {
    display: none;
  }

  /* ── Products Grid — Stacked ── */
  .products__grid {
    grid-template-columns: 1fr;
    gap: 0;
    background-color: transparent;
    border: none;
  }

  .product-card {
    padding: var(--space-8) var(--space-6);
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
    border-bottom: 1px solid rgba(142, 142, 147, 0.06);
  }

  .product-card:last-child {
    border-bottom: none;
  }

  .product-card__visual {
    width: 80px;
    min-width: 80px;
    aspect-ratio: 1;
  }

  .product-card__diagram {
    max-width: 80px;
  }

  .product-card__content {
    gap: var(--space-2);
  }

  .product-card__label {
    font-size: 0.5625rem;
  }

  .product-card__title {
    font-size: var(--text-lg);
  }

  .product-card__text {
    font-size: var(--text-sm);
    max-width: 100%;
    line-height: 1.6;
  }

  /* ── Architecture — Compact Vertical ── */
  .architecture__flow {
    max-width: 100%;
  }

  .architecture__node {
    padding: var(--space-4) var(--space-6);
  }

  .architecture__node-label {
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
  }

  .architecture__node-desc {
    font-size: 0.625rem;
  }

  .architecture__connector {
    height: 28px;
  }

  /* ── Principles — Editorial Stacked ── */
  .principles__grid {
    background-color: transparent;
    border-top: none;
  }

  .principle {
    padding: var(--space-10) 0;
    border-bottom: 1px solid rgba(142, 142, 147, 0.06);
  }

  .principle:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .principle__number {
    font-size: 0.625rem;
  }

  .principle__title {
    font-size: var(--text-xl);
    letter-spacing: 0.04em;
  }

  .principle__text {
    font-size: var(--text-sm);
    max-width: 100%;
  }

  /* ── Cases — Full-Width Editorial ── */
  .cases__list {
    background-color: transparent;
    border: none;
    gap: var(--space-12);
  }

  .case {
    grid-template-columns: 1fr;
    border: 1px solid rgba(142, 142, 147, 0.06);
    border-radius: 2px;
  }

  .case__visual {
    border-right: none;
    border-bottom: 1px solid rgba(142, 142, 147, 0.06);
    padding: var(--space-6);
    aspect-ratio: 16 / 9;
  }

  .case__diagram {
    opacity: 0.6;
  }

  .case__content {
    padding: var(--space-6);
    gap: var(--space-3);
  }

  .case__number {
    font-size: 0.625rem;
  }

  .case__title {
    font-size: var(--text-lg);
    letter-spacing: 0.03em;
  }

  .case__description {
    font-size: var(--text-sm);
    max-width: 100%;
    line-height: 1.6;
  }

  .case__tags {
    gap: var(--space-2);
  }

  .case__tag {
    font-size: 0.5625rem;
    padding: 2px var(--space-2);
  }

  .case__link {
    font-size: var(--text-sm);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  /* ── Metrics — Left-aligned Stack ── */
  .section--metrics {
    padding: var(--space-16) 0;
  }

  .metrics__grid {
    grid-template-columns: 1fr;
    gap: 0;
    text-align: left;
  }

  .metric {
    display: flex;
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-4);
    padding: var(--space-6) 0;
    border-bottom: 1px solid rgba(142, 142, 147, 0.06);
  }

  .metric:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .metric__value {
    font-size: var(--text-2xl);
    min-width: 80px;
  }

  .metric__label {
    font-size: var(--text-sm);
  }

  /* ── Technology Pipeline — Vertical Flow ── */
  .tech__pipeline {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    border: none;
    background-color: transparent;
  }

  .tech__arrow {
    display: block;
    text-align: center;
    font-size: var(--text-xs);
    color: var(--color-aluminium);
    opacity: 0.3;
    padding: var(--space-2) 0;
    transform: rotate(90deg);
  }

  .tech__stage {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    min-width: unset;
    padding: var(--space-4) var(--space-6);
    border: 1px solid rgba(142, 142, 147, 0.08);
    border-radius: 2px;
    background-color: rgba(34, 34, 34, 0.4);
  }

  .tech__stage-label {
    font-size: var(--text-sm);
  }

  .tech__stage-indicator {
    width: 8px;
    height: 8px;
  }

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

  .tech__detail-row {
    padding: var(--space-4) var(--space-6);
  }

  .tech__detail-label {
    font-size: 0.625rem;
  }

  .tech__detail-value {
    font-size: var(--text-base);
  }

  /* ── Company ── */
  .section--company {
    padding: var(--space-24) 0;
  }

  .company__text {
    font-size: var(--text-base);
    max-width: 100%;
    line-height: 1.7;
  }

  /* ── CTA ── */
  .section--cta {
    text-align: left;
  }

  .cta__content {
    align-items: flex-start;
  }

  .cta__title {
    font-size: var(--text-3xl);
  }

  .cta__text {
    font-size: var(--text-base);
  }

  .cta__content .btn--large {
    width: 100%;
    max-width: 300px;
    min-height: 52px;
    font-size: var(--text-base);
  }

  /* ── Footer — Stacked ── */
  .footer {
    padding: var(--space-12) 0 var(--space-8);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__nav {
    gap: var(--space-8);
    flex-direction: row;
  }

  .footer__col {
    gap: var(--space-3);
  }

  .footer__link {
    font-size: var(--text-sm);
    min-height: 36px;
    display: inline-flex;
    align-items: center;
  }

  .footer__location {
    padding-top: var(--space-4);
    border-top: 1px solid rgba(142, 142, 147, 0.06);
  }

  .footer__bottom {
    padding-top: var(--space-6);
  }
}

/* ─── Small Mobile (max-width: 480px) ─── */
@media (max-width: 480px) {
  .hero__headline {
    font-size: var(--text-3xl);
  }

  .section__title--large {
    font-size: var(--text-3xl);
  }

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

  .architecture__node {
    padding: var(--space-3) var(--space-4);
  }

  .architecture__connector {
    height: 20px;
  }

  .product-card {
    padding: var(--space-6) var(--space-4);
  }

  .product-card__visual {
    width: 64px;
    min-width: 64px;
  }

  .product-card__diagram {
    max-width: 64px;
  }

  .metric {
    flex-direction: column;
    gap: var(--space-1);
  }

  .metric__value {
    min-width: unset;
  }

  .case__visual {
    aspect-ratio: 4 / 3;
  }

  .footer__nav {
    flex-direction: column;
    gap: var(--space-6);
  }

  .cta__title {
    font-size: var(--text-2xl);
  }
}

/* ─── Very Small Mobile (max-width: 360px) ─── */
@media (max-width: 360px) {
  :root {
    --gutter: 1rem;
  }

  .hero__headline {
    font-size: var(--text-2xl);
  }

  .hero__actions .btn {
    max-width: 100%;
  }

  .nav__logo-mark {
    font-size: 1rem;
  }
}

/* ─── Landscape Mobile ─── */
@media (max-width: 768px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: var(--space-20) var(--gutter) var(--space-12);
  }

  .hero__brand {
    margin-bottom: var(--space-4);
  }

  .hero__headline {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
  }

  .hero__subheadline {
    margin-bottom: var(--space-6);
  }

  .hero__actions {
    flex-direction: row;
    gap: var(--space-4);
  }

  .hero__actions .btn {
    width: auto;
    max-width: none;
  }
}

/* ─── Touch-Friendly Enhancements ─── */
@media (hover: none) and (pointer: coarse) {
  /* Remove hover-only effects on touch devices */
  .product-card:hover {
    background-color: var(--color-dark-carbon);
  }

  .case:hover {
    background-color: var(--color-dark-carbon);
  }

  .case:hover .case__diagram {
    opacity: 0.5;
  }

  /* Add active states for touch feedback */
  .btn:active {
    transform: scale(0.98);
    opacity: 0.9;
  }

  .nav__mobile-link:active {
    background-color: rgba(142, 142, 147, 0.04);
  }

  .case__link:active {
    opacity: 0.7;
  }

  .footer__link:active {
    color: var(--color-off-white);
  }

  /* Ensure minimum tap targets (44x44px) */
  .case__link,
  .footer__link,
  .nav__mobile-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero__scroll-line {
    animation: none;
    opacity: 0.5;
  }

  .tech__stage-indicator {
    animation: none;
    opacity: 0.6;
  }
}

/* ─── Safe Area (Notch / Dynamic Island) ─── */
@supports (padding: env(safe-area-inset-top)) {
  .nav {
    padding-top: env(safe-area-inset-top);
  }

  .nav__mobile-menu {
    padding-bottom: env(safe-area-inset-bottom);
  }

  .footer {
    padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
  }

  .hero {
    padding-top: calc(var(--space-32) + env(safe-area-inset-top));
  }
}