:root {
  --green-dark: #0b4f2a;
  --green-main: #67b346;
  --orange: #f07a18;
  --white: #ffffff;
  --gray-50: #f5f5f5;
  --gray-200: #d8dfdb;
  --gray-500: #5f6f64;
  --gray-900: #14261d;
  --shadow-soft: 0 18px 50px rgba(11, 79, 42, 0.12);
  --shadow-card: 0 12px 28px rgba(9, 39, 23, 0.14);
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --container: min(1280px, 92vw);
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", sans-serif;
  color: var(--gray-900);
  background: linear-gradient(150deg, #eef5f0 0%, #f8faf9 40%, #f1f7f2 100%);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: var(--container);
  margin-inline: auto;
}

.section {
  position: relative;
  padding: 100px 0;
}

.section-bg {
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.86)),
    url("../img/bg.png");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Montserrat", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-main);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--orange);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-heading h2 {
  font-family: "Montserrat", sans-serif;
  font-size: clamp(1.9rem, 3.2vw, 2.75rem);
  line-height: 1.2;
  margin-bottom: 14px;
}

.section-heading p {
  color: var(--gray-500);
}

.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--radius-pill);
  padding: 13px 24px;
  font-family: "Montserrat", sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition),
    color var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(115deg, var(--green-dark), var(--green-main));
  color: var(--white);
  box-shadow: var(--shadow-soft);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.92);
  color: var(--green-dark);
  border: 1px solid rgba(11, 79, 42, 0.24);
}

.btn-light {
  background: var(--white);
  color: var(--green-dark);
}

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(8px);
}

.nav-wrap {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand img {
  width: 178px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav a {
  font-family: "Montserrat", sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
  color: #f2fff6;
  letter-spacing: 0.02em;
  transition: color var(--transition), opacity var(--transition);
}

.header.scrolled .nav a {
  color: var(--green-dark);
}

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

.btn-nav {
  margin-left: 6px;
  padding-inline: 18px;
  background: var(--orange);
  color: var(--white) !important;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: transparent;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--white);
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.header.scrolled .menu-toggle {
  border-color: rgba(11, 79, 42, 0.25);
}

.header.scrolled .menu-toggle span {
  background: var(--green-dark);
}

.hero {
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding-top: 130px;
  padding-bottom: 80px;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 84% 28%, rgba(240, 122, 24, 0.2), transparent 36%),
    linear-gradient(145deg, rgba(11, 79, 42, 0.86), rgba(11, 79, 42, 0.45) 50%, rgba(11, 79, 42, 0.22));
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 42px;
  align-items: center;
}

.hero-content {
  color: var(--white);
}

.hero-logo {
  width: 170px;
  margin-bottom: 20px;
}

.hero-content .eyebrow {
  color: #b6ff96;
}

.hero-content h1 {
  font-family: "Montserrat", sans-serif;
  font-size: clamp(2rem, 4.1vw, 3.8rem);
  line-height: 1.12;
  max-width: 760px;
  margin-bottom: 18px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.6vw, 1.38rem);
  margin-bottom: 34px;
  opacity: 0.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-media {
  position: relative;
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 14% 10% -12% 10%;
  background: radial-gradient(circle, rgba(103, 179, 70, 0.36), rgba(103, 179, 70, 0));
  filter: blur(16px);
  z-index: -1;
}

.hero-media img {
  width: min(620px, 100%);
  margin-inline: auto;
  filter: drop-shadow(0 32px 42px rgba(2, 17, 10, 0.35));
}

.scroll-indicator {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  color: var(--white);
  font-family: "Montserrat", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.scroll-indicator i {
  width: 2px;
  height: 36px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 1));
}

.card-grid {
  display: grid;
  gap: 18px;
}

.cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(103, 179, 70, 0.2);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(240, 122, 24, 0.45);
  box-shadow: 0 22px 34px rgba(5, 42, 22, 0.14);
}

.feature-card h3 {
  font-family: "Montserrat", sans-serif;
  font-size: 1.05rem;
  line-height: 1.32;
}

.icon-wrap {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: "Montserrat", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(140deg, var(--green-dark), var(--green-main));
  margin-bottom: 12px;
}

.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.split-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.split-content p {
  color: var(--gray-500);
  margin-bottom: 22px;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.mini-card {
  background: rgba(11, 79, 42, 0.88);
  color: var(--white);
  border-radius: 12px;
  padding: 14px 15px;
  font-family: "Montserrat", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(9, auto);
  align-items: center;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 10px;
}

.timeline-step {
  min-width: 165px;
  text-align: center;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(11, 79, 42, 0.2);
  border-radius: var(--radius-md);
  padding: 16px 14px;
}

.timeline-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin: 0 auto 10px;
  border-radius: 50%;
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(140deg, var(--green-main), var(--green-dark));
}

.timeline-step h3 {
  font-size: 0.95rem;
  font-family: "Montserrat", sans-serif;
}

.timeline-arrow {
  font-size: 1.25rem;
  color: var(--orange);
  font-weight: 800;
}

.case-study {
  background: var(--white);
}

.case-grid {
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  gap: 34px;
  align-items: center;
}

.case-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.case-card {
  border: 1px solid rgba(11, 79, 42, 0.16);
  border-radius: 14px;
  padding: 20px 16px;
  background: linear-gradient(145deg, #fff, #f6faf7);
}

.case-card strong {
  display: block;
  font-family: "Montserrat", sans-serif;
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  color: var(--green-dark);
  margin-bottom: 2px;
}

.case-card p {
  font-size: 0.95rem;
  color: var(--gray-500);
}

.case-note {
  color: var(--gray-500);
  max-width: 690px;
}

.case-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.comparison-chart {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(11, 79, 42, 0.15);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.bar-row {
  display: grid;
  grid-template-columns: 130px 1fr 180px;
  gap: 14px;
  align-items: center;
}

.bar-row + .bar-row {
  margin-top: 20px;
}

.bar-row .label,
.bar-row .value {
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
}

.bar-track {
  height: 20px;
  border-radius: var(--radius-pill);
  background: rgba(11, 79, 42, 0.11);
  overflow: hidden;
}

.bar {
  width: 0;
  height: 100%;
  border-radius: var(--radius-pill);
  transition: width 1.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.bar.diesel {
  background: linear-gradient(90deg, #164f34, #2c7b52);
}

.bar.biomass {
  background: linear-gradient(90deg, #67b346, #f07a18);
}

.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.app-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  min-height: 240px;
  isolation: isolate;
}

.app-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition), filter var(--transition);
}

.app-img-1 {
  object-position: 8% 30%;
}

.app-img-2 {
  object-position: 28% 50%;
}

.app-img-3 {
  object-position: 46% 34%;
}

.app-img-4 {
  object-position: 62% 52%;
}

.app-img-5 {
  object-position: 78% 36%;
}

.app-img-6 {
  object-position: 94% 48%;
}

.app-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(to top, rgba(11, 79, 42, 0.9), rgba(11, 79, 42, 0.2));
}

.app-card h3 {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 2;
  color: var(--white);
  font-family: "Montserrat", sans-serif;
  font-size: 1.02rem;
}

.app-card:hover img {
  transform: scale(1.06);
  filter: saturate(1.15);
}

.cta {
  background: linear-gradient(120deg, var(--green-dark), #1d6a3c 52%, var(--green-main));
  color: var(--white);
}

.cta-wrap {
  text-align: center;
  max-width: 840px;
}

.cta-wrap h2 {
  font-family: "Montserrat", sans-serif;
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  line-height: 1.16;
  margin-bottom: 14px;
}

.cta-wrap p {
  opacity: 0.94;
  margin-bottom: 24px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 28px;
  align-items: start;
}

.contact-info p,
.contact-info li {
  color: var(--gray-500);
}

.contact-info ul {
  margin-top: 18px;
  list-style: none;
  display: grid;
  gap: 9px;
}

.contact-form {
  display: grid;
  gap: 9px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(11, 79, 42, 0.15);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.contact-form label {
  font-size: 0.86rem;
  font-family: "Montserrat", sans-serif;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  border: 1px solid rgba(11, 79, 42, 0.22);
  border-radius: 10px;
  padding: 11px 12px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--gray-900);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 0;
  border-color: var(--green-main);
  box-shadow: 0 0 0 4px rgba(103, 179, 70, 0.18);
}

.footer {
  background: #0b2f1d;
  color: #e5f0e8;
  padding-top: 50px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 0.7fr;
  gap: 26px;
}

.footer-logo {
  width: 156px;
  margin-bottom: 12px;
}

.footer h3 {
  font-family: "Montserrat", sans-serif;
  margin-bottom: 10px;
}

.footer p {
  color: #bfd2c4;
  margin-bottom: 4px;
}

.footer-bottom {
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 0 24px;
  font-size: 0.9rem;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 0.6s linear;
  background: rgba(255, 255, 255, 0.45);
  pointer-events: none;
}