/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* === Variables === */
:root {
  --bg: #0d0d0d;
  --bg-alt: #111111;
  --bg-card: #181818;
  --gold: #c9a84c;
  --gold-light: #e0c47c;
  --gold-dim: rgba(201, 168, 76, 0.15);
  --text: #efefef;
  --text-2: #888;
  --text-3: #555;
  --border: #222;
  --border-gold: rgba(201, 168, 76, 0.25);
  --font-h: 'Oswald', sans-serif;
  --font-b: 'Inter', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-b);
  line-height: 1.6;
  overflow-x: hidden;
}

/* === Nav === */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  padding: 1.5rem 0;
  transition: background 0.4s, padding 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: rgba(10, 10, 10, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 0;
  border-bottom-color: var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: default;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--gold);
  color: #000;
  font-family: var(--font-h);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.logo-mark.sm { width: 32px; height: 32px; font-size: 0.75rem; }

.logo-text {
  font-family: var(--font-h);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: var(--text);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--gold); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

/* === Hero === */
#hero {
  position: relative;
  height: 100vh;
  min-height: 680px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#particle-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(ellipse at center, rgba(13,13,13,0) 30%, rgba(13,13,13,0.8) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 1.5rem;
}

.hero-tag {
  display: inline-block;
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  padding: 0.45rem 1.4rem;
  border: 1px solid var(--border-gold);
  animation: fadeDown 1s ease both;
}

.hero-title {
  font-family: var(--font-h);
  font-size: clamp(5.5rem, 16vw, 13rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 0.88;
  margin-bottom: 1.5rem;
  animation: fadeUp 1s ease 0.15s both;
}

.hero-line { display: block; color: var(--text); }
.hero-line.gold { color: var(--gold); }

.hero-subtitle {
  font-family: var(--font-h);
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.35em;
  color: var(--text-2);
  margin-bottom: 1rem;
  animation: fadeUp 1s ease 0.25s both;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text-2);
  max-width: 480px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
  animation: fadeUp 1s ease 0.35s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 1s ease 0.45s both;
}

.btn-primary {
  display: inline-block;
  padding: 0.85rem 2.4rem;
  background: var(--gold);
  color: #000;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-block;
  padding: 0.85rem 2.4rem;
  border: 1px solid var(--border-gold);
  color: var(--gold);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: border-color 0.2s, background 0.2s;
}

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

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-3);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  animation: fadeUp 1s ease 0.8s both;
}

.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  animation: pulse 2s ease-in-out infinite;
}

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

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

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* === Layout === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 7rem 0; }
.alt-section { background: var(--bg-alt); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-h);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.25rem;
}

.section-label::after {
  content: '';
  display: block;
  width: 36px;
  height: 1px;
  background: var(--gold);
  opacity: 0.5;
}

.section-header { margin-bottom: 3.5rem; }

.section-title {
  font-family: var(--font-h);
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-2);
  max-width: 580px;
  font-size: 0.95rem;
  line-height: 1.8;
}

.gold-text { color: var(--gold); }

/* === About === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-text h2 {
  font-family: var(--font-h);
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

.about-text p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 1.2rem;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
}

.stat-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s;
}

.stat-card:hover::after { transform: scaleX(1); }
.stat-card:hover { border-color: var(--border-gold); }

.stat-value {
  font-family: var(--font-h);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.stat-icon {
  font-size: 2.2rem;
  color: var(--gold);
  line-height: 1;
}

.stat-label {
  font-size: 0.73rem;
  color: var(--text-2);
  margin-top: 0.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* === Services === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2.25rem 1.75rem;
  transition: border-color 0.3s, transform 0.3s;
  cursor: default;
}

.service-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-5px);
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--gold);
  margin-bottom: 1.4rem;
}

.service-icon svg { width: 100%; height: 100%; }

.service-card h3 {
  font-family: var(--font-h);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 0.7rem;
}

.service-card p {
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.75;
  margin-bottom: 1.4rem;
}

.service-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.service-tags li {
  font-size: 0.7rem;
  color: var(--gold);
  border: 1px solid var(--border-gold);
  padding: 0.2rem 0.65rem;
  letter-spacing: 0.04em;
}

/* === Low Carbon === */
#lowcarbon { position: relative; overflow: hidden; }

#lowcarbon::before {
  content: 'LOW CARBON';
  position: absolute;
  top: 50%;
  right: -2%;
  transform: translateY(-50%);
  font-family: var(--font-h);
  font-size: clamp(5rem, 10vw, 11rem);
  font-weight: 900;
  color: rgba(201, 168, 76, 0.025);
  letter-spacing: 0.1em;
  pointer-events: none;
  white-space: nowrap;
  user-select: none;
}

.lowcarbon-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.lowcarbon-text h2 {
  font-family: var(--font-h);
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
}

.lowcarbon-text > p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 2.5rem;
}

.commitment-list { display: flex; flex-direction: column; gap: 1.75rem; }

.commitment-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.commitment-dot {
  width: 10px;
  height: 10px;
  background: var(--gold);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 0.5rem;
}

.commitment-item strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
  color: var(--text);
}

.commitment-item p {
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.7;
}

/* Ring graphic */
.lowcarbon-visual {
  position: relative;
  width: 100%;
  padding-bottom: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lc-ring, .lc-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
}

.lc-ring-1 {
  width: 75%;
  padding-bottom: 75%;
  border: 1px solid rgba(201, 168, 76, 0.35);
  animation: spin 18s linear infinite;
}

.lc-ring-2 {
  width: 58%;
  padding-bottom: 58%;
  border: 1px solid rgba(201, 168, 76, 0.2);
  animation: spin 12s linear infinite reverse;
}

.lc-ring-3 {
  width: 40%;
  padding-bottom: 40%;
  border: 1px solid rgba(201, 168, 76, 0.12);
  animation: spin 8s linear infinite;
}

/* Dot on ring */
.lc-ring-1::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  transform: translateX(-50%);
  width: 8px; height: 8px;
  background: var(--gold);
  border-radius: 50%;
}

.lc-ring-2::before {
  content: '';
  position: absolute;
  bottom: -4px; left: 50%;
  transform: translateX(-50%);
  width: 6px; height: 6px;
  background: var(--gold);
  border-radius: 50%;
  opacity: 0.6;
}

.lc-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  text-align: center;
}

.lc-pct {
  font-family: var(--font-h);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.lc-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-2);
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* === Contact === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 2rem; }

.contact-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.contact-icon {
  width: 42px;
  height: 42px;
  color: var(--gold);
  flex-shrink: 0;
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 9px;
}

.contact-icon svg { width: 100%; height: 100%; }

.contact-label {
  font-size: 0.7rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 0.3rem;
}

.contact-value {
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.6;
}

.contact-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--text-2);
  margin-top: 0.2rem;
}

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

.cc-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.contact-card-name {
  font-family: var(--font-h);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.cc-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 1.5rem;
}

.cc-full {
  font-family: var(--font-h);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.cc-reg {
  font-size: 0.8rem;
  color: var(--text-2);
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.cc-badge {
  display: inline-flex;
  align-items: center;
  background: var(--gold-dim);
  border: 1px solid var(--border-gold);
  padding: 0.4rem 1rem;
  margin-bottom: 1.5rem;
}

.cc-badge span {
  font-size: 0.75rem;
  color: var(--gold);
  letter-spacing: 0.05em;
}

.cc-location {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-2);
  font-size: 0.82rem;
}

.cc-location svg { color: var(--gold); flex-shrink: 0; }

/* === Footer === */
footer {
  background: #080808;
  border-top: 1px solid var(--border);
  padding: 3.5rem 0 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-tagline {
  font-size: 0.75rem;
  color: var(--text-2);
  letter-spacing: 0.08em;
  margin-top: 0.1rem;
}

.footer-nav {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-3);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.footer-nav a:hover { color: var(--gold); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-3);
  font-size: 0.75rem;
  line-height: 1.7;
}

/* === Reveal Animation === */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

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

/* stagger service cards */
.services-grid .service-card:nth-child(2) { transition-delay: 0.08s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.16s; }
.services-grid .service-card:nth-child(4) { transition-delay: 0.04s; }
.services-grid .service-card:nth-child(5) { transition-delay: 0.12s; }
.services-grid .service-card:nth-child(6) { transition-delay: 0.20s; }

/* === Mobile === */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(10,10,10,0.98); padding: 1.5rem 2rem; gap: 1.25rem; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .about-grid,
  .lowcarbon-inner,
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }

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

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

  .lowcarbon-visual {
    max-width: 280px;
    margin: 0 auto;
    padding-bottom: 280px;
  }

  .section { padding: 5rem 0; }

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

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .about-stats { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .stat-card { padding: 1.5rem 1rem; }
  .stat-value { font-size: 1.8rem; }
  .hero-tag { font-size: 0.65rem; letter-spacing: 0.2em; }
}