/* ─── CSS VARIABLES ─── */
:root {
  --green:      #0C614E;
  --green-dark: #094338;
  --blue:       #2F799E;
  --blue-light: #3d8cb3;
  --yellow:     #e8bb5e;
  --yellow-dark:#d4a440;
  --black:      #111111;
  --gray:       #f4f4f0;
  --white:      #ffffff;
  --text:       #1a1a1a;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Montserrat', sans-serif;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
}

/* ─── NAVBAR ─── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  height: 72px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  cursor: pointer;
}

.logo-img {
  width: auto;
  max-width: 160px;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.45rem 1rem;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  transition: background 0.18s, color 0.18s;
  cursor: pointer;
}

.nav-links a:hover { background: var(--gray); }
.nav-links a.active { background: var(--green); color: var(--white); }

.nav-cta {
  background: var(--green) !important;
  color: var(--white) !important;
  padding: 0.5rem 1.25rem !important;
}
.nav-cta:hover { background: var(--green-dark) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* ─── HERO ─── */
.hero {
  min-height: 100vh;
  background: var(--green);
  display: flex;
  align-items: center;
  padding: 120px 2.5rem 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47,121,158,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232,187,94,0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(232,187,94,0.2);
  border: 1px solid rgba(232,187,94,0.4);
  color: var(--yellow);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.hero-label::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--yellow);
}

.hero-title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: clamp(2.4rem, 4.5vw, 3.75rem);
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-title em {
  font-style: italic;
  font-weight: 300;
  color: var(--yellow);
}

.hero-sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.75);
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-block;
  padding: 0.9rem 2rem;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  border: 2px solid transparent;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--yellow);
  color: var(--black);
  border-color: var(--yellow);
}
.btn-primary:hover {
  background: var(--yellow-dark);
  border-color: var(--yellow-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.btn-green {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}
.btn-green:hover {
  background: var(--green-dark);
  border-color: var(--green-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(12,97,78,0.3);
}

.hero-right {
  position: relative;
}

.hero-image-wrap {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(0,0,0,0.4);
  aspect-ratio: 4/3;
  background: var(--green-dark);
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
}

.hero-stat-card {
  position: absolute;
  background: var(--white);
  border-radius: 12px;
  padding: 1rem 1.4rem;
  box-shadow: 0 16px 48px rgba(0,0,0,0.25);
}

.hero-stat-card.top {
  top: -1.5rem;
  right: -1.5rem;
}

.hero-stat-card.bottom {
  bottom: -1.5rem;
  left: -1.5rem;
}

.stat-num {
  font-family: 'Montserrat', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--green);
  line-height: 1;
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 3px;
}

/* ─── SECTION UTILS ─── */
.section { padding: 80px 2.5rem; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--blue);
  margin-bottom: 0.75rem;
}
.section-title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}
.section-title.white { color: var(--white); }
.section-title.blue { color: var(--blue); }
.section-body {
  font-size: 1rem;
  line-height: 1.75;
  color: #444;
  max-width: 600px;
}

/* ─── YELLOW SECTION ─── */
.yellow-section {
  background: var(--yellow);
  padding: 80px 2.5rem;
}

.yellow-section .section-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.yellow-section h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.yellow-section p {
  font-size: 1rem;
  line-height: 1.75;
  color: #333;
}

.yellow-img {
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
}

.yellow-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ─── FEATURE CARDS ─── */
.features-section {
  background: var(--white);
  padding: 80px 2.5rem;
}

.features-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border: 1.5px solid #e8e8e4;
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
  transform: translateY(-4px);
  border-color: var(--blue);
}
.card:hover::before { transform: scaleX(1); }

.card-icon {
  width: 52px; height: 52px;
  background: rgba(47,121,158,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.card-icon svg { width: 26px; height: 26px; color: var(--blue); }

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.6rem;
}

.card p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #555;
}

/* ─── CTA BANNER ─── */
.cta-banner {
  background: var(--green);
  padding: 64px 2.5rem;
  text-align: center;
}

.cta-banner h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.6rem, 2.5vw, 2.2rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1.5rem;
}

/* ─── PAGE HEADER ─── */
.page-header {
  background: var(--yellow);
  padding: 120px 2.5rem 64px;
  text-align: center;
}

.page-header .label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: 1rem;
  display: block;
}

.page-header h1 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  color: var(--black);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 700px;
  margin: 0 auto 1.5rem;
}

.page-header p {
  font-size: 1rem;
  color: #333;
  max-width: 520px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

/* ─── FEATURE LIST GRID ─── */
.features-list-section {
  background: var(--white);
  padding: 80px 2.5rem;
}

.features-list-header {
  margin-bottom: 3rem;
}

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

.feature-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.75rem;
  background: var(--gray);
  border-radius: 14px;
  transition: all 0.25s;
}

.feature-item:hover {
  background: #ececea;
  transform: translateY(-2px);
}

.feature-item-icon {
  width: 48px; height: 48px;
  flex-shrink: 0;
  background: rgba(47,121,158,0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item-icon svg { width: 24px; height: 24px; color: var(--blue); }

.feature-item-text h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.feature-item-text p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: #555;
}

/* ─── TWO COL ─── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

/* ─── ENERGY HUB INTRO ─── */
.hub-intro {
  background: var(--yellow);
  padding: 64px 2.5rem;
}

.hub-intro-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.hub-intro h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 1rem;
}

.hub-intro p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: #333;
}

.hub-box {
  background: var(--white);
  border-radius: 12px;
  padding: 1.75rem;
  border-left: 4px solid var(--green);
}

.hub-box h3 {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--green);
  margin-bottom: 0.6rem;
}

.hub-box p { font-size: 0.9rem; line-height: 1.65; color: #444; }

/* ─── DATA LIST ─── */
.data-list {
  list-style: none;
  margin-top: 0.75rem;
}

.data-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: #444;
  padding: 0.3rem 0;
}

.data-list li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}

/* ─── CONTACT ─── */
.contact-section {
  padding: 100px 2.5rem 80px;
}

.contact-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
}

.contact-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  line-height: 1.1;
}

.contact-title span { color: var(--green); }

.contact-subtitle {
  font-size: 1rem;
  color: #555;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.form-group { margin-bottom: 1.2rem; }

.form-group label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: #444;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid #ddd;
  border-radius: 8px;
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--green); }

.form-group textarea { resize: vertical; min-height: 120px; }

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

.field-validation-error {
  display: block;
  font-size: 0.8rem;
  color: #c0392b;
  margin-top: 0.3rem;
}

.contact-info h3 {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.35rem;
  margin-top: 1.5rem;
}

.contact-info h3:first-child { margin-top: 0; }

.contact-info p, .contact-info a {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.65;
  text-decoration: none;
}

.contact-info a:hover { color: var(--green); }

.contact-info-card {
  background: var(--gray);
  border-radius: 14px;
  padding: 2rem;
  margin-top: 2.5rem;
}

/* ─── MODAL ─── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  width: 100%;
  max-width: 460px;
  position: relative;
  box-shadow: 0 32px 80px rgba(0,0,0,0.3);
}

.modal-close {
  position: absolute;
  top: 1.25rem; right: 1.25rem;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--gray);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.modal-close:hover { background: #ddd; }

.modal h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.modal p {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* ─── FOOTER ─── */
footer {
  background: #0e0e0e;
  color: rgba(255,255,255,0.75);
  padding: 64px 2.5rem 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 2rem;
}

.footer-brand .brand-name {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.25rem;
}

.footer-brand .brand-tag {
  font-size: 0.78rem;
  color: var(--yellow);
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 260px;
}

.footer-cta-small {
  display: inline-block;
  background: var(--yellow);
  color: var(--black);
  font-weight: 700;
  font-size: 0.82rem;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.2s;
  cursor: pointer;
}
.footer-cta-small:hover { background: var(--yellow-dark); }

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 1.25rem;
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.6rem; }
.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.18s;
}
.footer-col ul li a:hover { color: var(--white); }

.footer-col address {
  font-style: normal;
  font-size: 0.88rem;
  line-height: 1.75;
}

.footer-col address a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
}
.footer-col address a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-legal a {
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.18s;
}
.footer-legal a:hover { color: rgba(255,255,255,0.7); }

.footer-logo {
    width: auto;
    max-width: 160px;
    display: block;
    margin-bottom: 8px;
}

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

.fade-up {
  animation: fadeUp 0.65s ease forwards;
}

.fade-up:nth-child(2) { animation-delay: 0.1s; }
.fade-up:nth-child(3) { animation-delay: 0.2s; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .navbar { padding: 0 1.5rem; }
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero-inner,
  .yellow-section .section-inner,
  .two-col,
  .hub-intro-inner,
  .contact-grid { grid-template-columns: 1fr; }

  .hero-right { display: none; }
  .hero { padding-top: 100px; text-align: center; }
  .hero-label { margin: 0 auto 1.5rem; }
  .hero-sub { margin: 0 auto 2rem; }
  .hero-actions { justify-content: center; }

  .cards-grid { grid-template-columns: 1fr; }
  .features-list-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }

  .section, .features-section, .features-list-section, .yellow-section,
  .hub-intro, .cta-banner { padding: 56px 1.5rem; }

  .page-header { padding: 100px 1.5rem 48px; }
  .contact-section { padding: 80px 1.5rem 60px; }
}

/* mobile nav open */
.nav-links.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: var(--white);
  padding: 1rem 1.5rem 1.5rem;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  z-index: 999;
}

/* ─── SUCCESS STATE ─── */
.success-msg {
  display: none;
  text-align: center;
  padding: 1.5rem;
}
.success-msg.show { display: block; }
.success-icon {
  width: 56px; height: 56px;
  background: rgba(12,97,78,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}
.success-icon svg { color: var(--green); }
.success-msg h3 { font-family: 'Montserrat', sans-serif; font-size: 1.4rem; margin-bottom: 0.5rem; }
.success-msg p { font-size: 0.92rem; color: #666; }