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

/* ── Design Tokens (Light Mode) ──────────────────────────────────────────── */
:root {
  /* Surface */
  --clr-surface:                  #faf9f7;
  --clr-surface-dim:              #dadad8;
  --clr-surface-container-lowest: #ffffff;
  --clr-surface-container-low:    #f4f3f1;
  --clr-surface-container:        #efeeec;
  --clr-surface-container-high:   #e9e8e6;
  --clr-surface-container-highest:#e3e2e0;
  --clr-on-surface:               #1a1c1b;
  --clr-on-surface-variant:       #44474a;
  --clr-outline:                  #75777a;
  --clr-outline-variant:          #c5c6ca;

  /* Primary — Charcoal */
  --clr-primary:            #0d0f0e;
  --clr-on-primary:         #ffffff;
  --clr-primary-container:  #1a1c1e;

  /* Secondary — Bronze */
  --clr-secondary:           #735a3a;
  --clr-secondary-light:     #a68966;
  --clr-secondary-container: #fddab2;
  --clr-on-secondary:        #ffffff;

  /* Background */
  --clr-bg:        #faf9f7;
  --clr-on-bg:     #1a1c1b;

  /* Typography */
  --font-display: 'Hanken Grotesk', sans-serif;
  --font-body:    'Manrope', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Spacing */
  --space-1:  8px;
  --space-2:  16px;
  --space-3:  24px;
  --space-4:  32px;
  --space-5:  40px;
  --space-6:  48px;
  --space-8:  64px;
  --space-10: 80px;
  --space-12: 96px;
  --space-16: 128px;

  /* Layout */
  --container-max: 1440px;
  --margin-desktop: 64px;
  --margin-tablet:  32px;
  --margin-mobile:  20px;
  --gutter: 24px;

  /* Border radius */
  --radius-sm:  0.125rem;
  --radius:     0.25rem;
  --radius-md:  0.375rem;
  --radius-lg:  0.5rem;
  --radius-xl:  0.75rem;

  /* Nav height */
  --nav-h: 72px;

  /* Transition */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur:  240ms;
}

/* ── Dark Mode Tokens ────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --clr-surface:                  #141615;
  --clr-surface-dim:              #0e1010;
  --clr-surface-container-lowest: #0a0c0b;
  --clr-surface-container-low:    #181a19;
  --clr-surface-container:        #1c1e1d;
  --clr-surface-container-high:   #222423;
  --clr-surface-container-highest:#282b2a;
  --clr-on-surface:               #e2e3e1;
  --clr-on-surface-variant:       #c4c7c5;
  --clr-outline:                  #8e9190;
  --clr-outline-variant:          #3c3f3e;

  --clr-primary:           #e2e3e1;
  --clr-on-primary:        #0d0f0e;
  --clr-primary-container: #282b2a;

  --clr-secondary:           #e2c19b;
  --clr-secondary-light:     #d4a97a;
  --clr-secondary-container: #3d2c15;
  --clr-on-secondary:        #1a0e00;

  --clr-bg:    #111312;
  --clr-on-bg: #e2e3e1;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-on-bg);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  overflow-x: hidden;
}

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

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

.section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
  display: block;
  margin-bottom: var(--space-2);
}

.section-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--clr-on-bg);
  letter-spacing: -0.01em;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--clr-outline-variant);
}

/* ── Animate on scroll ───────────────────────────────────────────────────── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}
.animate-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}
.animate-delay-1 { transition-delay: 100ms; }
.animate-delay-2 { transition-delay: 200ms; }
.animate-delay-3 { transition-delay: 300ms; }
.animate-delay-4 { transition-delay: 400ms; }

/* ── Navbar ──────────────────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

#navbar.scrolled {
  background: var(--clr-bg);
  box-shadow: 0 1px 0 var(--clr-outline-variant);
}

#navbar.hidden { transform: translateY(-100%); }

.nav-inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--margin-desktop);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-on-primary);
  flex-shrink: 0;
  transition: color var(--dur) var(--ease);
}

#navbar.scrolled .nav-logo { color: var(--clr-on-bg); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: auto;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: rgba(255,255,255,0.85);
  position: relative;
  transition: color var(--dur) var(--ease);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--clr-secondary-light);
  transition: width var(--dur) var(--ease);
}

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.nav-link:hover,
.nav-link.active { color: #fff; }

#navbar.scrolled .nav-link {
  color: var(--clr-on-surface-variant);
}
#navbar.scrolled .nav-link:hover,
#navbar.scrolled .nav-link.active {
  color: var(--clr-on-surface);
}

/* Nav controls */
.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-4);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: 3px;
  transition: background var(--dur) var(--ease);
}

#navbar.scrolled .lang-switcher {
  background: var(--clr-surface-container);
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: var(--radius-lg);
  color: rgba(255,255,255,0.6);
  transition: all var(--dur) var(--ease);
}

.lang-btn.active,
.lang-btn:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

#navbar.scrolled .lang-btn {
  color: var(--clr-on-surface-variant);
}

#navbar.scrolled .lang-btn.active,
#navbar.scrolled .lang-btn:hover {
  background: var(--clr-secondary-container);
  color: var(--clr-on-surface);
}

/* Theme toggle */
#theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.1);
  transition: all var(--dur) var(--ease);
}

#theme-toggle:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

#navbar.scrolled #theme-toggle {
  color: var(--clr-on-surface-variant);
  background: var(--clr-surface-container);
}

#navbar.scrolled #theme-toggle:hover {
  background: var(--clr-surface-container-high);
  color: var(--clr-on-surface);
}

#theme-toggle svg { width: 16px; height: 16px; pointer-events: none; }

/* Mobile menu toggle */
#mobile-menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.1);
  transition: all var(--dur) var(--ease);
}

#navbar.scrolled #mobile-menu-toggle {
  color: var(--clr-on-surface-variant);
  background: var(--clr-surface-container);
}

/* Mobile overlay menu */
#mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--clr-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  transform: translateX(100%);
  transition: transform 360ms var(--ease);
}

#mobile-menu.open { transform: translateX(0); }

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 600;
  color: var(--clr-on-bg);
  letter-spacing: -0.01em;
  transition: color var(--dur) var(--ease);
}

.mobile-nav-link:hover { color: var(--clr-secondary-light); }

.mobile-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.mobile-lang-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--clr-outline-variant);
  color: var(--clr-on-surface-variant);
  transition: all var(--dur) var(--ease);
}

.mobile-lang-btn.active,
.mobile-lang-btn:hover {
  background: var(--clr-secondary);
  border-color: var(--clr-secondary);
  color: #fff;
}

/* ── Hero ────────────────────────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding-bottom: var(--space-12);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to bottom,
      rgba(0,0,0,0.15) 0%,
      rgba(0,0,0,0.05) 30%,
      rgba(0,0,0,0.55) 70%,
      rgba(0,0,0,0.78) 100%
    ),
    linear-gradient(135deg, #1a1c1b 0%, #2f3130 40%, #44474a 100%);
  background-size: cover;
  background-position: center;
}

/* When a real image is provided, add it here: */
/* .hero-bg { background-image: url('../assets/images/hero.jpg'), ... } */

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--margin-desktop);
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
  display: block;
  margin-bottom: var(--space-3);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: 780px;
  margin-bottom: var(--space-4);
}

.hero-headline .accent {
  color: var(--clr-secondary-light);
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.4vw, 18px);
  font-weight: 400;
  line-height: 1.65;
  color: rgba(255,255,255,0.72);
  max-width: 520px;
  margin-bottom: var(--space-5);
}

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

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn-primary {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 14px 28px;
  background: #fff;
  color: var(--clr-primary);
  border-radius: var(--radius);
  transition: all var(--dur) var(--ease);
  flex-shrink: 0;
}

.btn-primary:hover {
  background: var(--clr-secondary-container);
  color: var(--clr-on-surface);
}

.btn-secondary {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 13px 28px;
  border: 1.5px solid rgba(255,255,255,0.5);
  color: #fff;
  border-radius: var(--radius);
  transition: all var(--dur) var(--ease);
  flex-shrink: 0;
}

.btn-secondary:hover {
  border-color: var(--clr-secondary-light);
  color: var(--clr-secondary-light);
}

.btn-outline-dark {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 13px 28px;
  border: 1.5px solid var(--clr-secondary-light);
  color: var(--clr-secondary-light);
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--dur) var(--ease);
}

.btn-outline-dark:hover {
  background: var(--clr-secondary-light);
  color: #fff;
}

.btn-text {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.btn-text::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--clr-secondary-light);
  transition: width var(--dur) var(--ease);
}

.btn-text:hover::after { width: 100%; }

/* Hero scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--space-4);
  right: var(--margin-desktop);
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 1;
}

.scroll-line {
  width: 40px;
  height: 1px;
  background: rgba(255,255,255,0.3);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: var(--clr-secondary-light);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%   { left: -100%; }
  50%  { left: 0; }
  100% { left: 100%; }
}

/* ── Systems & Solutions ─────────────────────────────────────────────────── */
#systems {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--clr-outline-variant);
}

.systems-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: end;
  margin-bottom: var(--space-12);
}

.systems-description {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--clr-on-surface-variant);
  max-width: 420px;
  justify-self: end;
  align-self: end;
}

/* ── Product Grid ────────────────────────────────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--clr-outline-variant);
  border: 1px solid var(--clr-outline-variant);
}

.product-card {
  background: var(--clr-surface-container-lowest);
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: background var(--dur) var(--ease);
  cursor: pointer;
}

.product-card:hover {
  background: var(--clr-surface-container-low);
}

.product-card-image {
  width: 100%;
  aspect-ratio: 16/10;
  background: var(--clr-surface-container-high);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
  background: var(--clr-secondary-container);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

[data-theme="dark"] .product-tag {
  background: var(--clr-secondary-container);
  color: var(--clr-secondary-light);
}

.product-spec {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--clr-outline);
  text-transform: uppercase;
}

.product-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--clr-on-surface);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.product-desc {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--clr-on-surface-variant);
  flex: 1;
}

.product-arrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
  margin-top: var(--space-1);
  transition: gap var(--dur) var(--ease);
}

.product-card:hover .product-arrow { gap: 14px; }

.product-arrow svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ── Features ────────────────────────────────────────────────────────────── */
#features {
  padding: var(--space-16) 0;
  background: var(--clr-primary);
  color: var(--clr-on-primary);
}

[data-theme="dark"] #features {
  background: var(--clr-surface-container);
  color: var(--clr-on-surface);
}

.features-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: end;
  margin-bottom: var(--space-10);
}

.features-header .section-tag { color: var(--clr-secondary-light); }
.features-header .section-headline { color: #fff; }

[data-theme="dark"] .features-header .section-headline { color: var(--clr-on-surface); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.1);
}

[data-theme="dark"] .features-grid { background: var(--clr-outline-variant); }

.feature-item {
  background: var(--clr-primary);
  padding: var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

[data-theme="dark"] .feature-item {
  background: var(--clr-surface-container);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
}

[data-theme="dark"] .feature-icon { border-color: var(--clr-outline-variant); }

.feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--clr-secondary-light);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.01em;
}

[data-theme="dark"] .feature-title { color: var(--clr-on-surface); }

.feature-body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255,255,255,0.6);
}

[data-theme="dark"] .feature-body { color: var(--clr-on-surface-variant); }

/* ── Stats Bar ───────────────────────────────────────────────────────────── */
#stats {
  background: var(--clr-secondary);
  padding: var(--space-8) 0;
}

[data-theme="dark"] #stats { background: var(--clr-secondary-container); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.2);
}

[data-theme="dark"] .stats-grid { background: var(--clr-outline-variant); }

.stat-item {
  background: var(--clr-secondary);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

[data-theme="dark"] .stat-item { background: var(--clr-secondary-container); }

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
}

[data-theme="dark"] .stat-value { color: var(--clr-on-surface); }

.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
}

[data-theme="dark"] .stat-label { color: var(--clr-on-surface-variant); }

/* ── About ───────────────────────────────────────────────────────────────── */
#about {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--clr-outline-variant);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.about-image {
  aspect-ratio: 4/5;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

.about-body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--clr-on-surface-variant);
}

.about-divider {
  width: 40px;
  height: 2px;
  background: var(--clr-secondary-light);
}

/* ── Certifications ──────────────────────────────────────────────────────── */
#certifications {
  padding: var(--space-12) 0;
  background: var(--clr-surface-container-low);
  border-bottom: 1px solid var(--clr-outline-variant);
}

.certs-header {
  margin-bottom: var(--space-8);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--clr-outline-variant);
  border: 1px solid var(--clr-outline-variant);
}

.cert-item {
  background: var(--clr-surface-container-lowest);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: background var(--dur) var(--ease);
}

.cert-item:hover { background: var(--clr-surface-container-low); }

.cert-code {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
}

.cert-label {
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.45;
  color: var(--clr-on-surface-variant);
}

/* ── Contact ─────────────────────────────────────────────────────────────── */
#contact {
  padding: var(--space-16) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact-description {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--clr-on-surface-variant);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  border-top: 1px solid var(--clr-outline-variant);
  padding-top: var(--space-5);
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-detail-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
}

.contact-detail-value {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--clr-on-surface);
  white-space: pre-line;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.field {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--clr-outline-variant);
  border-radius: var(--radius);
  padding: 12px 16px;
  gap: 3px;
  background: var(--clr-surface-container-lowest);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.field:focus-within {
  border-color: var(--clr-secondary-light);
  background: var(--clr-surface-container-low);
}

.field label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-secondary-light);
  display: none;
}

.field:focus-within label { display: block; }

.field input,
.field select,
.field textarea {
  font-size: 14px;
  color: var(--clr-on-surface);
  background: transparent;
  width: 100%;
  resize: none;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--clr-outline);
}

.field select {
  appearance: none;
  cursor: pointer;
  color: var(--clr-outline);
}

.field select.filled { color: var(--clr-on-surface); }

.field textarea { min-height: 100px; }

.form-submit {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 15px 32px;
  background: var(--clr-primary);
  color: var(--clr-on-primary);
  border-radius: var(--radius);
  width: 100%;
  transition: all var(--dur) var(--ease);
  margin-top: var(--space-1);
}

[data-theme="dark"] .form-submit {
  background: var(--clr-on-surface);
  color: var(--clr-surface);
}

.form-submit:hover { opacity: 0.88; }
.form-submit:disabled {
  opacity: 0.6;
  cursor: default;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  background: var(--clr-primary);
  color: var(--clr-on-primary);
  padding: var(--space-10) 0 var(--space-5);
}

[data-theme="dark"] footer {
  background: var(--clr-surface-container);
  border-top: 1px solid var(--clr-outline-variant);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: var(--space-5);
}

[data-theme="dark"] .footer-top { border-bottom-color: var(--clr-outline-variant); }

.footer-brand {}

.footer-logo {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: var(--space-3);
  display: block;
}

[data-theme="dark"] .footer-logo { color: var(--clr-on-surface); }

.footer-tagline {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.65;
  color: rgba(255,255,255,0.5);
  max-width: 280px;
}

[data-theme="dark"] #footer-tagline { color: var(--clr-on-surface-variant); }

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-3);
}

[data-theme="dark"] .footer-col-title { color: var(--clr-on-surface-variant); }

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

.footer-links a {
  font-family: var(--font-body);
  font-size: 13px;
  color: rgba(255,255,255,0.65);
  transition: color var(--dur) var(--ease);
}

[data-theme="dark"] .footer-links a { color: var(--clr-on-surface-variant); }

.footer-links a:hover {
  color: var(--clr-secondary-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copyright {
  font-family: var(--font-body);
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}

[data-theme="dark"] .footer-copyright { color: var(--clr-on-surface-variant); }

.footer-legal {
  display: flex;
  gap: var(--space-3);
}

.footer-legal a {
  font-family: var(--font-body);
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  transition: color var(--dur) var(--ease);
}

[data-theme="dark"] .footer-legal a { color: var(--clr-on-surface-variant); }

.footer-legal a:hover { color: var(--clr-secondary-light); }

/* ── Responsive: Tablet (≤ 1024px) ──────────────────────────────────────── */
@media (max-width: 1024px) {
  :root {
    --margin-desktop: var(--margin-tablet);
  }

  .nav-links { gap: var(--space-4); }

  .systems-header,
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-8); }

  .systems-description { justify-self: start; max-width: 100%; }

  .features-header { grid-template-columns: 1fr; }

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

  .certs-grid { grid-template-columns: repeat(3, 1fr); }

  .footer-top { grid-template-columns: 1fr 1fr; }

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

/* ── Responsive: Mobile (≤ 768px) ───────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --margin-desktop: var(--margin-mobile);
    --space-16: 80px;
    --space-12: 60px;
  }

  /* Mobile nav */
  .nav-links,
  .nav-controls { display: none; }

  #mobile-menu-toggle { display: flex; margin-left: auto; }

  #navbar .nav-logo { color: var(--clr-on-primary); }
  #navbar.scrolled .nav-logo { color: var(--clr-on-bg); }

  /* Show mobile theme toggle inside mobile menu */
  .mobile-theme-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  /* Products grid → single column */
  .products-grid { grid-template-columns: 1fr; }

  /* Features */
  .features-grid { grid-template-columns: 1fr; }

  /* Certs */
  .certs-grid { grid-template-columns: repeat(2, 1fr); }

  /* Stats */
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  /* Footer */
  .footer-top { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer-bottom { flex-direction: column; gap: var(--space-2); text-align: center; }

  /* Hero scroll indicator */
  .hero-scroll { display: none; }

  /* Form row */
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .btn-primary, .btn-secondary { width: 100%; text-align: center; }
}