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

/* ---- DARK MODE (default) ---- */
:root,
body.dark {
  --col-black:   #060b14;
  --col-dark:    #0a1628;
  --col-slate:   #0f1f3a;
  --col-mid:     #162846;
  --col-muted:   #3a5070;
  --col-border:  rgba(0, 229, 200, 0.12);
  --col-teal:    #00e5c8;
  --col-teal-dim:#00b89f;
  --col-white:   #f0f4f8;
  --col-offwhite:#a8b8cc;
  --col-red:     #e24b4a;
  --col-amber:   #ef9f27;
  --col-text-main: #f0f4f8;
  --col-bg-main:   #060b14;
  --col-grid-line: rgba(0,229,200,0.035);
  --col-hub-fill:  #0a1628;
  --col-nav-bg:    rgba(6, 11, 20, 0.88);
  --shadow-card: none;
}

/* ---- LIGHT MODE ---- */
body.light {
  --col-black:   #f5f7fa;
  --col-dark:    #ffffff;
  --col-slate:   #eef2f7;
  --col-mid:     #dde5f0;
  --col-muted:   #7a96b4;
  --col-border:  rgba(0, 140, 120, 0.18);
  --col-teal:    #009e8c;
  --col-teal-dim:#007d6e;
  --col-white:   #0d1f33;
  --col-offwhite:#3a5070;
  --col-red:     #c0392b;
  --col-amber:   #b76c0a;
  --col-text-main: #0d1f33;
  --col-bg-main:   #f5f7fa;
  --col-grid-line: rgba(0,140,120,0.06);
  --col-hub-fill:  #ffffff;
  --col-nav-bg:    rgba(245, 247, 250, 0.92);
  --shadow-card: 0 2px 16px rgba(0,0,0,0.07);
}

body {
  transition: background-color 0.35s ease, color 0.35s ease;
}

/* ---- Theme Toggle Button ---- */
.theme-toggle {
  background: none;
  border: 1px solid var(--col-border);
  color: var(--col-offwhite);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--col-teal);
  color: var(--col-teal);
  background: rgba(0,229,200,0.06);
}
.theme-toggle svg {
  width: 16px;
  height: 16px;
  transition: opacity 0.2s, transform 0.3s;
}
body.dark .icon-sun  { display: block; }
body.dark .icon-moon { display: none; }
body.light .icon-sun  { display: none; }
body.light .icon-moon { display: block; }

/* ---- Hub fill fix for light mode ---- */
.turbine-hub { fill: var(--col-hub-fill); }

/* ===========================
   HERO IMAGE
=========================== */
.hero-img-wrap {
  position: relative;
  display: inline-block;
  max-width: 480px;
  width: 100%;
}

.hero-turbine-img {
  width: 100%;
  display: block;
  border-radius: 4px;
  /* subtle teal tint overlay via box-shadow */
  box-shadow:
    0 0 0 1px var(--col-border),
    0 24px 60px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(0, 229, 200, 0.08);
  transition: box-shadow 0.35s ease;
}

body.light .hero-turbine-img {
  box-shadow:
    0 0 0 1px var(--col-border),
    0 16px 40px rgba(0, 0, 0, 0.12),
    0 0 40px rgba(0, 158, 140, 0.06);
}

/* Bracket corners */
.hero-img-corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--col-teal);
  border-style: solid;
  opacity: 0.7;
}
.hero-img-corner--tl { top: -6px; left: -6px; border-width: 2px 0 0 2px; }
.hero-img-corner--tr { top: -6px; right: -6px; border-width: 2px 2px 0 0; }
.hero-img-corner--bl { bottom: -6px; left: -6px; border-width: 0 0 2px 2px; }
.hero-img-corner--br { bottom: -6px; right: -6px; border-width: 0 2px 2px 0; }

.hero-img-badge {
  position: absolute;
  bottom: 14px;
  left: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(6, 11, 20, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 229, 200, 0.25);
  border-radius: 3px;
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--col-teal);
  pointer-events: none;
}

body.light .hero-img-badge {
  background: rgba(245, 247, 250, 0.88);
}

.badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--col-teal);
  animation: pulse 2s infinite;
}

/* ===========================
   MODEL TABS (Specs)
=========================== */
.model-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 2.5rem;
  border: 1px solid var(--col-border);
  border-radius: 4px;
  overflow: hidden;
  max-width: 560px;
}

.model-tab {
  flex: 1;
  background: none;
  border: none;
  border-right: 1px solid var(--col-border);
  padding: 0.85rem 1.2rem;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition), color var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.model-tab:last-child { border-right: none; }

.model-tab:hover { background: var(--col-slate); }

.model-tab.active {
  background: var(--col-teal);
}

.model-tab-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  color: var(--col-white);
  line-height: 1;
  transition: color var(--transition);
}
.model-tab.active .model-tab-name { color: var(--col-black); }

.model-tab-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--col-offwhite);
  transition: color var(--transition);
}
.model-tab.active .model-tab-sub { color: rgba(6,11,20,0.65); }

html { scroll-behavior: smooth; }

:root {
  --font-display: 'Bebas Neue', sans-serif;
  --font-serif:   'Fraunces', serif;
  --font-mono:    'DM Mono', monospace;
  --transition:   0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background-color: var(--col-black);
  color: var(--col-white);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--col-dark); }
::-webkit-scrollbar-thumb { background: var(--col-teal); border-radius: 3px; }

/* ---- Smooth theme transitions on key elements ---- */
.nav, .tech-card, .case-card, .specs-table tbody tr,
.aside-callout, .tier, .form-card, .footer,
.section, body, .hero-bg {
  transition: background 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

/* ---- CONTAINER ---- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===========================
   NAV
=========================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--col-nav-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--col-border);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.nav.scrolled {
  border-bottom-color: rgba(0,229,200,0.2);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  color: var(--col-white);
  text-decoration: none;
}
.nav-logo span { color: var(--col-teal); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--col-offwhite);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--col-teal); }

.nav-cta {
  background: var(--col-teal) !important;
  color: var(--col-black) !important;
  padding: 0.45rem 1.2rem;
  border-radius: 3px;
  font-weight: 500 !important;
  transition: background var(--transition) !important;
}
.nav-cta:hover { background: var(--col-teal-dim) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--col-white);
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  padding: 1rem 2rem 1.5rem;
  border-top: 1px solid var(--col-border);
}
.mobile-menu ul { list-style: none; }
.mobile-menu a {
  display: block;
  padding: 0.7rem 0;
  color: var(--col-offwhite);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--col-border);
}
.mobile-menu a:hover { color: var(--col-teal); }
.mobile-menu.open { display: block; }

/* ===========================
   HERO
=========================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  padding: 100px 2rem 4rem;
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
}

.hero-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,200,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,200,0.035) 1px, transparent 1px);
  background-size: 60px 60px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,229,200,0.08) 0%, transparent 70%);
  top: -100px; left: -100px;
}
.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,50,200,0.06) 0%, transparent 70%);
  bottom: 0; right: 0;
}

.hero-tag {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--col-teal);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s both;
}
.tag-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--col-teal);
  animation: pulse 2s infinite;
}

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

.hero-title {
  display: flex;
  flex-direction: column;
  font-family: var(--font-display);
  line-height: 0.9;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
  overflow: hidden;
}

.line-1 {
  font-size: clamp(5rem, 9vw, 9rem);
  color: var(--col-white);
  animation: fadeUp 0.8s 0.1s both;
}
.line-2 {
  font-size: clamp(3rem, 5.5vw, 5.5rem);
  color: var(--col-offwhite);
  letter-spacing: 0.04em;
  animation: fadeUp 0.8s 0.2s both;
}
.line-3 {
  font-size: clamp(5rem, 9vw, 9rem);
  color: var(--col-teal);
  animation: fadeUp 0.8s 0.3s both;
}

.hero-sub {
  color: var(--col-offwhite);
  font-size: 1.05rem;
  max-width: 480px;
  margin-bottom: 2rem;
  font-style: italic;
  animation: fadeUp 0.8s 0.4s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  animation: fadeUp 0.8s 0.5s both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.6s both;
}

.stat {
  display: flex;
  flex-direction: column;
}
.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--col-teal);
  letter-spacing: 0.04em;
  line-height: 1;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--col-offwhite);
  margin-top: 0.2rem;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--col-border);
}

/* Hero visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 1.2s 0.3s both;
}

.turbine-svg {
  width: 100%;
  max-width: 400px;
}

#blades {
  animation: spin 6s linear infinite;
  transform-origin: 200px 200px;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===========================
   BUTTONS
=========================== */
.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.75rem 1.8rem;
  border-radius: 3px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--col-teal);
  color: var(--col-black);
  font-weight: 500;
}
.btn-primary:hover {
  background: var(--col-teal-dim);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--col-offwhite);
  border: 1px solid var(--col-muted);
}
.btn-ghost:hover {
  border-color: var(--col-teal);
  color: var(--col-teal);
}

.btn-full { width: 100%; text-align: center; }

/* ===========================
   MARQUEE BAND
=========================== */
.marquee-band {
  background: var(--col-teal);
  overflow: hidden;
  white-space: nowrap;
  padding: 0.7rem 0;
}

.marquee-inner {
  display: inline-block;
  animation: marquee 28s linear infinite;
}

.marquee-inner span {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--col-black);
  margin: 0 1.5rem;
}
.marquee-inner .sep {
  color: rgba(0,0,0,0.4);
  margin: 0;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===========================
   SECTIONS — SHARED
=========================== */
.section {
  padding: 7rem 0;
  border-top: 1px solid var(--col-border);
}

.section-header {
  margin-bottom: 4rem;
}

.section-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--col-teal);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  line-height: 0.95;
  color: var(--col-white);
  letter-spacing: 0.02em;
}

/* ===========================
   TECHNOLOGY
=========================== */
.technology { background: var(--col-black); }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5px;
  background: var(--col-border);
}

.tech-card {
  background: var(--col-dark);
  padding: 2.5rem;
  transition: background var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-card);
}
.tech-card:hover { background: var(--col-slate); }

.tech-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.5rem;
}

.tech-card h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  color: var(--col-white);
  margin-bottom: 0.8rem;
}

.tech-card p {
  color: var(--col-offwhite);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ===========================
   SPECS
=========================== */
.specs { background: var(--col-dark); }

.specs-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: start;
}

.specs-table-wrap {
  overflow-x: auto;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.specs-table thead th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--col-teal);
  text-align: left;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid rgba(0,229,200,0.3);
}

.specs-table tbody tr {
  border-bottom: 1px solid var(--col-border);
  transition: background var(--transition);
}
.specs-table tbody tr:hover { background: var(--col-slate); }

.specs-table td {
  padding: 0.85rem 1rem;
  color: var(--col-offwhite);
  font-family: var(--font-serif);
}

.specs-table td.val {
  color: var(--col-white);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: nowrap;
  text-align: right;
}

.specs-aside {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: sticky;
  top: 80px;
}

.aside-callout {
  padding: 1.5rem;
  border: 1px solid var(--col-border);
  border-left: 3px solid var(--col-teal);
}

.callout-num {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--col-teal);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.callout-label {
  font-size: 0.85rem;
  color: var(--col-offwhite);
  line-height: 1.6;
}

/* ===========================
   USE CASES
=========================== */
.use-cases { background: var(--col-black); }

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.case-card {
  padding: 2.5rem;
  border: 1px solid var(--col-border);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}
.case-card:hover {
  border-color: rgba(0,229,200,0.3);
  background: var(--col-slate);
}
.case-card.case-primary {
  border-color: rgba(0,229,200,0.25);
  background: var(--col-dark);
}

.case-number {
  font-family: var(--font-display);
  font-size: 4rem;
  color: rgba(0,229,200,0.12);
  line-height: 1;
  position: absolute;
  top: 1rem; right: 1.5rem;
  letter-spacing: -0.02em;
  user-select: none;
}

.case-card h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  letter-spacing: 0.04em;
  color: var(--col-white);
  margin-bottom: 1rem;
}
.case-card p {
  color: var(--col-offwhite);
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
}

.case-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.case-list li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--col-teal);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-left: 1rem;
  position: relative;
}
.case-list li::before {
  content: '→';
  position: absolute;
  left: 0;
}

/* ===========================
   SUSTAINABILITY
=========================== */
.sustainability { background: var(--col-dark); }

.sustain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.lead-text {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--col-white);
  margin-bottom: 1.5rem;
  line-height: 1.65;
}

.sustain-text p {
  color: var(--col-offwhite);
  margin-bottom: 1.2rem;
  font-size: 0.95rem;
}

.sustain-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}

.badge {
  display: inline-block;
  background: rgba(0,229,200,0.08);
  border: 1px solid rgba(0,229,200,0.2);
  color: var(--col-teal);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.8rem;
  border-radius: 2px;
}

.metric-block {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-top: 0.5rem;
}

.metric-bar-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.metric-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--col-offwhite);
}

.metric-val { font-weight: 500; }
.metric-val.teal { color: var(--col-teal); }
.metric-val.red { color: var(--col-red); }
.metric-val.amber { color: var(--col-amber); }

.bar-track {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1.5s cubic-bezier(0.4,0,0.2,1);
}
.bar-fill.teal { background: var(--col-teal); }
.bar-fill.red { background: var(--col-red); }
.bar-fill.amber { background: var(--col-amber); }

.metric-note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--col-muted);
  line-height: 1.6;
}

/* ===========================
   CONTACT / PRE-ORDER
=========================== */
.contact { background: var(--col-black); }

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-left .section-title { margin-bottom: 1.5rem; }
.contact-left > p {
  color: var(--col-offwhite);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
  max-width: 420px;
}

.pricing-tiers {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tier {
  padding: 1.2rem 1.5rem;
  border: 1px solid var(--col-border);
  position: relative;
}

.tier-featured {
  border-color: rgba(0,229,200,0.4);
  background: rgba(0,229,200,0.04);
}

.tier-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--col-teal);
  border: 1px solid rgba(0,229,200,0.4);
  padding: 0.15rem 0.6rem;
  margin-bottom: 0.5rem;
  border-radius: 2px;
}

.tier-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--col-white);
  letter-spacing: 0.05em;
}
.tier-price {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--col-teal);
  letter-spacing: 0.04em;
  line-height: 1.2;
}
.tier-note {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--col-offwhite);
  letter-spacing: 0.04em;
  margin-top: 0.3rem;
}

/* Form */
.form-card {
  background: var(--col-dark);
  border: 1px solid var(--col-border);
  padding: 2.5rem;
}

.form-card h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  color: var(--col-white);
  margin-bottom: 1.8rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--col-offwhite);
}

.form-group input,
.form-group select {
  background: var(--col-slate);
  border: 1px solid var(--col-border);
  color: var(--col-white);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  padding: 0.7rem 1rem;
  border-radius: 2px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
  appearance: none;
}
.form-group input::placeholder { color: var(--col-muted); }
.form-group input:focus,
.form-group select:focus { border-color: var(--col-teal); }

.form-group select option { background: var(--col-dark); }

.form-note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--col-muted);
  margin-top: 1rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
}

/* ===========================
   FOOTER
=========================== */
.footer {
  background: var(--col-dark);
  border-top: 1px solid var(--col-border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.1em;
  color: var(--col-white);
  margin-bottom: 1rem;
}
.footer-logo span { color: var(--col-teal); }

.footer-brand p {
  font-size: 0.85rem;
  color: var(--col-muted);
  max-width: 240px;
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}
.social-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--col-muted);
  text-decoration: none;
  border: 1px solid var(--col-border);
  padding: 0.35rem 0.6rem;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition), border-color var(--transition);
}
.social-links a:hover { color: var(--col-teal); border-color: rgba(0,229,200,0.4); }

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--col-teal);
  margin-bottom: 1.2rem;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.6rem; }
.footer-col a {
  font-size: 0.88rem;
  color: var(--col-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--col-white); }

.footer-bottom {
  border-top: 1px solid var(--col-border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--col-muted);
  letter-spacing: 0.06em;
}

.footer-legal {
  display: flex;
  gap: 2rem;
}
.footer-legal a {
  color: var(--col-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-legal a:hover { color: var(--col-teal); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 80px;
    gap: 3rem;
  }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { order: -1; }
  .turbine-svg { max-width: 280px; }

  .tech-grid { grid-template-columns: 1fr; }
  .specs-layout { grid-template-columns: 1fr; }
  .specs-aside { position: static; }
  .cases-grid { grid-template-columns: 1fr; }
  .sustain-grid { grid-template-columns: 1fr; gap: 3rem; }
  .contact-wrap { grid-template-columns: 1fr; gap: 3rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .section { padding: 4rem 0; }
  .hero-stats { flex-direction: column; align-items: center; }
  .stat-divider { width: 40px; height: 1px; }
}

/* ===========================
   CONTACT PAGE
=========================== */
.contact-page {
  padding-top: 64px;
  min-height: 100vh;
  background: var(--col-black);
}

.contact-hero {
  background: var(--col-dark);
  border-bottom: 1px solid var(--col-border);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.contact-hero::before {
  content: 'CONTACT';
  position: absolute;
  font-family: var(--font-display);
  font-size: 16rem;
  color: rgba(0,229,200,0.03);
  bottom: -2rem;
  right: -1rem;
  letter-spacing: 0.05em;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.contact-hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

.contact-hero .section-tag {
  display: block;
  margin-bottom: 1rem;
}

.contact-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  color: var(--col-white);
  line-height: 0.95;
  letter-spacing: 0.02em;
  margin-bottom: 1.2rem;
}

.contact-hero h1 em {
  color: var(--col-teal);
  font-style: normal;
}

.contact-hero p {
  color: var(--col-offwhite);
  font-size: 1rem;
  max-width: 500px;
  font-style: italic;
}

/* Contact main grid */
.contact-main {
  max-width: 1160px;
  margin: 0 auto;
  padding: 5rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}

/* Info column */
.contact-info { display: flex; flex-direction: column; gap: 2.5rem; }

.info-block {
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--col-border);
}
.info-block:last-child { border-bottom: none; padding-bottom: 0; }

.info-block h3 {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--col-teal);
  margin-bottom: 0.8rem;
}

.info-block p,
.info-block a {
  color: var(--col-offwhite);
  font-size: 0.95rem;
  text-decoration: none;
  line-height: 1.7;
  display: block;
  transition: color var(--transition);
}
.info-block a:hover { color: var(--col-teal); }

.info-detail {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--col-white) !important;
  line-height: 1.2 !important;
  margin-top: 0.3rem;
}

/* Enquiry type tabs */
.enquiry-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
  border: 1px solid var(--col-border);
  border-radius: 3px;
  overflow: hidden;
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  border-right: 1px solid var(--col-border);
  color: var(--col-offwhite);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.7rem 0.5rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.tab-btn:last-child { border-right: none; }
.tab-btn:hover { background: var(--col-slate); color: var(--col-white); }
.tab-btn.active {
  background: var(--col-teal);
  color: var(--col-black);
  font-weight: 500;
}

/* Contact form card */
.contact-form-card {
  background: var(--col-dark);
  border: 1px solid var(--col-border);
  padding: 2.5rem;
}

.contact-form-card h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.04em;
  color: var(--col-white);
  margin-bottom: 0.4rem;
}

.form-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--col-offwhite);
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--col-border);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group textarea {
  background: var(--col-slate);
  border: 1px solid var(--col-border);
  color: var(--col-white);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  padding: 0.7rem 1rem;
  border-radius: 2px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
  resize: vertical;
  min-height: 120px;
}
.form-group textarea::placeholder { color: var(--col-muted); }
.form-group textarea:focus { border-color: var(--col-teal); }

.char-count {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--col-muted);
  text-align: right;
  margin-top: 0.3rem;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  margin-bottom: 1.5rem;
}
.form-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  min-width: 16px;
  margin-top: 2px;
  accent-color: var(--col-teal);
  cursor: pointer;
}
.form-checkbox label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--col-offwhite);
  letter-spacing: 0.04em;
  line-height: 1.6;
  cursor: pointer;
}

/* Success state */
.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 3rem 1rem;
  gap: 1rem;
}
.form-success.visible { display: flex; }

.success-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(0,229,200,0.1);
  border: 1px solid rgba(0,229,200,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.form-success h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  letter-spacing: 0.05em;
  color: var(--col-white);
}
.form-success p {
  color: var(--col-offwhite);
  font-size: 0.9rem;
  max-width: 320px;
}

/* FAQ accordion */
.faq-section {
  background: var(--col-dark);
  border-top: 1px solid var(--col-border);
  padding: 5rem 0;
}

.faq-grid {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 5rem;
  align-items: start;
}

.faq-heading { position: sticky; top: 80px; }

.faq-heading .section-tag { margin-bottom: 1rem; }
.faq-heading h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 3.8rem);
  line-height: 0.95;
  color: var(--col-white);
  letter-spacing: 0.02em;
}

.faq-list { display: flex; flex-direction: column; }

.faq-item {
  border-bottom: 1px solid var(--col-border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--col-white);
  font-family: var(--font-serif);
  font-size: 1rem;
  text-align: left;
  padding: 1.4rem 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--col-teal); }

.faq-arrow {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border: 1px solid var(--col-border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  color: var(--col-teal);
  transition: transform var(--transition), background var(--transition);
}
.faq-item.open .faq-arrow {
  transform: rotate(45deg);
  background: rgba(0,229,200,0.1);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1), padding 0.3s ease;
}
.faq-answer p {
  color: var(--col-offwhite);
  font-size: 0.9rem;
  line-height: 1.8;
  padding-bottom: 1.4rem;
}
.faq-item.open .faq-answer {
  max-height: 400px;
}

/* Contact page responsive */
@media (max-width: 900px) {
  .contact-main { grid-template-columns: 1fr; gap: 3rem; }
  .faq-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .faq-heading { position: static; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .contact-hero { padding: 4rem 0 3rem; }
  .contact-hero::before { display: none; }
  .faq-section { padding: 3.5rem 0; }
}