/* ═══════════════════════════════════════════════
   AIRVA+ — STYLES.CSS
   Premium Environment Optimisation Brand
   ═══════════════════════════════════════════════ */

/* ── Tokens ── */
:root {
  --black:        #0A0A0A;
  --black-mid:    #111111;
  --black-soft:   #161616;
  --black-card:   #1A1A1A;
  --grey-900:     #1E1E1E;
  --grey-800:     #252525;
  --grey-700:     #333333;
  --grey-400:     #666666;
  --grey-200:     #AAAAAA;
  --grey-100:     #DDDDDD;
  --white:        #FFFFFF;
  --white-90:     rgba(255,255,255,0.90);
  --white-60:     rgba(255,255,255,0.60);
  --white-30:     rgba(255,255,255,0.30);
  --white-10:     rgba(255,255,255,0.10);
  --white-06:     rgba(255,255,255,0.06);
  --white-03:     rgba(255,255,255,0.03);
  --green:        #0F8F5B;
  --green-light:  #12A868;
  --green-dark:   #0A6B43;
  --green-glow:   rgba(15,143,91,0.15);
  --green-glow-md:rgba(15,143,91,0.25);

  --font-display: 'Bebas Neue', sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --nav-h:        72px;
  --radius-sm:    6px;
  --radius-md:    10px;
  --radius-lg:    16px;
  --radius-xl:    24px;

  --ease-out:  cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:   cubic-bezier(0.64, 0, 0.78, 0);
  --ease-io:   cubic-bezier(0.65, 0, 0.35, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, select, textarea { font: inherit; }
::selection { background: var(--green); color: var(--white); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--grey-700); border-radius: 2px; }

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

/* ─────────────────────────────────────
   LAYOUT HELPERS
───────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}
@media (max-width: 768px) { .container { padding: 0 20px; } }

.section {
  padding: 120px 0;
  position: relative;
}
.section-dark {
  background: var(--black-mid);
}

/* ── Section headers ── */
.section-header {
  margin-bottom: 64px;
  max-width: 640px;
}
.section-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 16px;
  padding: 4px 12px;
  border: 1px solid rgba(15,143,91,0.35);
  border-radius: 100px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(38px, 5vw, 56px);
  letter-spacing: 0.02em;
  line-height: 1.05;
  color: var(--white);
  margin-bottom: 20px;
}
.section-desc {
  font-size: 17px;
  color: var(--white-60);
  line-height: 1.7;
}

/* ─────────────────────────────────────
   REVEAL ANIMATIONS
───────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
.delay-4 { transition-delay: 0.32s; }
.delay-5 { transition-delay: 0.40s; }
.delay-6 { transition-delay: 0.48s; }

/* ─────────────────────────────────────
   BUTTONS
───────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.18s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--white);
}
.btn-primary:hover {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--white-30);
}
.btn-secondary:hover {
  border-color: var(--green);
  color: var(--green);
}

.btn-full { width: 100%; justify-content: center; }

/* ─────────────────────────────────────
   NAVIGATION
───────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background 0.4s var(--ease-io), backdrop-filter 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--white-10);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
}
.logo-img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--white-60);
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--green);
  transition: width 0.25s var(--ease-out);
}
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }

.nav-links .nav-cta {
  color: var(--white);
  padding: 8px 18px;
  border: 1px solid var(--white-30);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, color 0.2s;
}
.nav-links .nav-cta::after { display: none; }
.nav-links .nav-cta:hover {
  border-color: var(--green);
  color: var(--green);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.3s, opacity 0.3s;
  border-radius: 1px;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-inner { padding: 0 20px; }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10,10,10,0.97);
    backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 22px; }
}

/* ─────────────────────────────────────
   HERO
───────────────────────────────────── */
#hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: var(--nav-h) 0 80px;
  position: relative;
  overflow: hidden;
}

/* Atmospheric background orbs */
.hero-bg-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.hero-bg-orb:first-child {
  width: 700px;
  height: 700px;
  top: -200px;
  right: -200px;
  background: radial-gradient(circle, rgba(15,143,91,0.12) 0%, transparent 70%);
  animation: orb-drift 12s ease-in-out infinite alternate;
}
.orb-2 {
  width: 400px;
  height: 400px;
  bottom: -100px;
  left: -100px;
  background: radial-gradient(circle, rgba(15,143,91,0.07) 0%, transparent 70%);
  animation: orb-drift 16s ease-in-out infinite alternate-reverse;
}

@keyframes orb-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, -30px) scale(1.06); }
}

/* Subtle grid overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, transparent, rgba(0,0,0,0.4) 20%, rgba(0,0,0,0.4) 80%, transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 40px;
}

.hero-eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--green);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(64px, 9vw, 120px);
  letter-spacing: 0.02em;
  line-height: 0.95;
  color: var(--white);
  margin-bottom: 32px;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--white-60);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--green), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.1); }
}
.hero-scroll-indicator span {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white-30);
}

/* Metric pills */
.hero-metrics {
  position: absolute;
  right: 40px;
  bottom: 80px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 2;
}
.metric-pill {
  background: var(--white-06);
  border: 1px solid var(--white-10);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  backdrop-filter: blur(8px);
}
.metric-num {
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.02em;
  color: var(--white);
}
.metric-label {
  font-size: 11px;
  color: var(--white-60);
  letter-spacing: 0.04em;
  max-width: 80px;
  line-height: 1.3;
}

@media (max-width: 900px) {
  .hero-metrics { display: none; }
  .hero-content { padding: 0 20px; }
  .hero-headline { font-size: clamp(52px, 14vw, 80px); }
}

/* ─────────────────────────────────────
   ABOUT
───────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-statement p {
  font-size: 18px;
  color: var(--white-60);
  line-height: 1.75;
  margin-bottom: 24px;
}
.about-statement p:first-of-type {
  font-size: 20px;
  color: var(--white-90);
}
.about-accent-line {
  width: 48px;
  height: 2px;
  background: var(--green);
  margin: 28px 0;
}
.about-sub {
  font-size: 16px !important;
  color: var(--white-60) !important;
}

.about-pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.pillar {
  padding: 24px;
  border: 1px solid var(--white-06);
  border-radius: var(--radius-md);
  background: var(--white-03);
  transition: border-color 0.3s, background 0.3s;
}
.pillar:hover {
  border-color: rgba(15,143,91,0.3);
  background: rgba(15,143,91,0.04);
}
.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--white-06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  margin-bottom: 14px;
}
.pillar h3 {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--white);
  margin-bottom: 8px;
}
.pillar p {
  font-size: 13px;
  color: var(--white-60);
  line-height: 1.6;
}

@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 540px) {
  .about-pillars { grid-template-columns: 1fr; }
}

/* ─────────────────────────────────────
   PRODUCTS
───────────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--white-10);
  border: 1px solid var(--white-10);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.product-card {
  background: var(--black-mid);
  transition: background 0.3s;
  position: relative;
}
.product-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15,143,91,0.04);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.product-card:hover { background: var(--black-card); }
.product-card:hover::after { opacity: 1; }

.product-card-inner {
  padding: 40px 36px;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.product-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--white-06);
  border: 1px solid var(--white-10);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  margin-bottom: 20px;
  transition: background 0.3s, border-color 0.3s;
}
.product-card:hover .product-icon {
  background: rgba(15,143,91,0.1);
  border-color: rgba(15,143,91,0.3);
}
.product-number {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--green);
  margin-bottom: 10px;
}
.product-card h3 {
  font-size: 18px;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}
.product-card p {
  font-size: 14px;
  color: var(--white-60);
  line-height: 1.65;
  margin-bottom: 20px;
  flex: 1;
}
.product-benefits {
  margin-bottom: 28px;
}
.product-benefits li {
  font-size: 12px;
  color: var(--white-60);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.product-benefits li::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}
.product-cta {
  font-size: 13px;
  font-weight: 500;
  color: var(--white-60);
  display: flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.04em;
  transition: color 0.2s;
  margin-top: auto;
}
.product-cta span {
  display: inline-block;
  transition: transform 0.2s var(--ease-out);
}
.product-cta:hover { color: var(--green); }
.product-cta:hover span { transform: translateX(4px); }

@media (max-width: 960px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .products-grid { grid-template-columns: 1fr; }
  .product-card-inner { padding: 28px 24px; }
}

/* ─────────────────────────────────────
   SERVICES
───────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--white-03);
  border: 1px solid var(--white-06);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, background 0.3s;
}
.service-card:hover {
  border-color: rgba(15,143,91,0.25);
  background: rgba(15,143,91,0.03);
}
.service-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--white-10);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  margin-bottom: 20px;
  transition: border-color 0.3s, background 0.3s;
}
.service-card:hover .service-icon-wrap {
  background: rgba(15,143,91,0.08);
  border-color: rgba(15,143,91,0.3);
}
.service-card h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}
.service-card p {
  font-size: 14px;
  color: var(--white-60);
  line-height: 1.65;
}
.service-accent {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--green);
  transition: width 0.4s var(--ease-out);
}
.service-card:hover .service-accent { width: 100%; }

@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .services-grid { grid-template-columns: 1fr; }
  .service-card { padding: 28px 24px; }
}

/* ─────────────────────────────────────
   INDUSTRIES
───────────────────────────────────── */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}
.industry-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--white-06);
  transition: color 0.2s;
}
.industry-item:last-child, .industry-item:nth-last-child(2):nth-child(odd) {
  border-bottom: none;
}
.industry-item:hover { color: var(--white); }
.industry-item span {
  font-size: 16px;
  font-weight: 400;
  color: var(--white-60);
  transition: color 0.2s;
}
.industry-item:hover span { color: var(--white); }

.industry-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  transition: transform 0.2s;
}
.industry-item:hover .industry-dot { transform: scale(1.5); }

.industries-quote {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-top: 80px;
}
.quote-line {
  flex: 1;
  height: 1px;
  background: var(--white-10);
}
.industries-quote blockquote {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 32px);
  letter-spacing: 0.04em;
  color: var(--white-30);
  text-align: center;
  white-space: nowrap;
}

@media (max-width: 700px) {
  .industries-grid { grid-template-columns: 1fr; }
  .industries-quote { flex-direction: column; gap: 20px; }
  .industries-quote blockquote { white-space: normal; }
  .quote-line { width: 100%; }
}

/* ─────────────────────────────────────
   CONTACT
───────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}

.contact-info-block h3 {
  font-size: 22px;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 16px;
}
.contact-info-block p {
  font-size: 16px;
  color: var(--white-60);
  line-height: 1.7;
  margin-bottom: 40px;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}
.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
  color: var(--white-60);
}
.contact-detail-item svg { color: var(--green); flex-shrink: 0; }
.contact-detail-item a { transition: color 0.2s; }
.contact-detail-item a:hover { color: var(--green); }

.social-proof-tag {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(15,143,91,0.08);
  border: 1px solid rgba(15,143,91,0.25);
  border-radius: 100px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green);
}

/* Form */
.contact-form-wrap {
  background: var(--white-03);
  border: 1px solid var(--white-06);
  border-radius: var(--radius-xl);
  padding: 40px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.form-group label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white-60);
}
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--white-06);
  border: 1px solid var(--white-10);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--white);
  font-size: 14px;
  width: 100%;
  transition: border-color 0.2s, background 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--grey-400); }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--grey-900); color: var(--white); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--green);
  background: rgba(15,143,91,0.05);
}
.form-group input.error,
.form-group select.error { border-color: #E24B4A; }
.form-group textarea { resize: vertical; min-height: 110px; }

.form-error {
  font-size: 12px;
  color: #E24B4A;
  min-height: 16px;
  display: block;
}

.form-actions { margin-top: 8px; }

/* Submit button states */
#submitBtn {
  position: relative;
  overflow: hidden;
}
.btn-loading {
  display: none;
  position: absolute;
}
#submitBtn.loading .btn-text { opacity: 0; }
#submitBtn.loading .btn-loading { display: flex; }

.spinner { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(15,143,91,0.1);
  border: 1px solid rgba(15,143,91,0.3);
  border-radius: var(--radius-sm);
  color: var(--green);
  font-size: 14px;
}
.form-success.visible { display: flex; }

@media (max-width: 960px) {
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 540px) {
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px 20px; }
}

/* ─────────────────────────────────────
   FOOTER
───────────────────────────────────── */
#footer {
  background: var(--black-mid);
  border-top: 1px solid var(--white-06);
  padding: 64px 0 40px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 80px;
  margin-bottom: 48px;
}
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand .logo-img { height: 30px; }
.footer-brand p {
  font-size: 14px;
  color: var(--white-60);
  line-height: 1.7;
  max-width: 280px;
}
.footer-nav { display: flex; gap: 80px; }
.footer-nav-col h4 {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white-30);
  margin-bottom: 20px;
}
.footer-nav-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-nav-col a {
  font-size: 14px;
  color: var(--white-60);
  transition: color 0.2s;
}
.footer-nav-col a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--white-06);
}
.footer-copy {
  font-size: 13px;
  color: var(--white-30);
}
.footer-tagline {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--white-30);
}

@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

/* ─────────────────────────────────────
   BACK TO TOP
───────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--white-06);
  border: 1px solid var(--white-10);
  color: var(--white-60);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, background 0.2s, color 0.2s;
  z-index: 900;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}

/* ─────────────────────────────────────
   REDUCED MOTION
───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1; transform: none; }
  .hero-bg-orb { animation: none; }
  .scroll-line { animation: none; }
  html { scroll-behavior: auto; }
}