/* ===== CSS Variables ===== */
:root {
  --green-50: #e8f5e9;
  --green-100: #c8e6c9;
  --green-200: #a5d6a7;
  --green-300: #81c784;
  --green-400: #66bb6a;
  --green-500: #00a651;
  --green-600: #008c44;
  --green-700: #00753a;
  --green-800: #005e2f;
  --green-900: #004725;
  --green-accent: #00c853;

  --dark-900: #0a0f0a;
  --dark-800: #111811;
  --dark-700: #1a231a;
  --dark-600: #243024;

  --gray-100: #f5f7f5;
  --gray-200: #e8ece8;
  --gray-300: #d1d9d1;
  --gray-400: #9eab9e;
  --gray-500: #6b7a6b;
  --gray-600: #4a554a;
  --gray-700: #333b33;

  --white: #ffffff;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition);
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
  font-family: 'Montserrat', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark-800);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--green-500);
  color: var(--white);
  border-color: var(--green-500);
}

.btn-primary:hover {
  background: var(--green-600);
  border-color: var(--green-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 166, 81, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--green-700);
  border-color: var(--white);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-full {
  width: 100%;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--gray-200);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

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

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--dark-800);
  letter-spacing: 0.5px;
  line-height: 1.1;
}

.logo-tagline {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: 8px;
  transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--green-600);
  background: var(--green-50);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--dark-800);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0a2e1a 0%, #0d3d24 40%, #125c36 100%);
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(0, 200, 83, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 166, 81, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300a651' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 60px 0;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  color: var(--white);
  margin-bottom: 24px;
  font-weight: 800;
}

.hero-title .highlight {
  color: var(--green-accent);
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto 40px;
  font-weight: 400;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.scroll-icon {
  width: 24px;
  height: 36px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  position: relative;
}

.scroll-icon::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--green-accent);
  border-radius: 2px;
  animation: scrollBounce 1.5s infinite;
}

@keyframes scrollBounce {
  0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.4; transform: translateX(-50%) translateY(10px); }
}

/* ===== Section Commons ===== */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-600);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ===== Services ===== */
.services {
  padding: 100px 0;
  background: var(--gray-100);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-card-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  max-width: 100%;
}

.service-card-wide .service-image {
  min-height: 320px;
}

.service-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .service-image img {
  transform: scale(1.05);
}

.service-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.4) 0%, transparent 50%);
}

.service-content {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--green-50);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--green-600);
}

.service-icon svg {
  width: 24px;
  height: 24px;
}

.service-content h3 {
  font-size: 1.25rem;
  margin-bottom: 6px;
  color: var(--dark-800);
}

.service-acronym {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-600);
  margin-bottom: 12px;
}

.service-content > p {
  font-size: 0.95rem;
  color: var(--gray-600);
  margin-bottom: 20px;
  flex: 1;
}

.service-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.service-features li {
  font-size: 0.85rem;
  color: var(--gray-600);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.service-features li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 7px;
  background: var(--green-500);
  border-radius: 50%;
}

/* ===== About ===== */
.about {
  padding: 100px 0;
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-content .section-title {
  text-align: left;
  margin-bottom: 24px;
}

.about-content p {
  margin-bottom: 16px;
  color: var(--gray-600);
  font-size: 1.05rem;
}

.about-content strong {
  color: var(--green-700);
}

.about-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid var(--gray-200);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--green-600);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.feature-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--gray-100);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.feature-item:hover {
  background: var(--green-50);
  transform: translateX(4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: var(--white);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-600);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-item h4 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0;
}

/* ===== CTA ===== */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--green-700) 0%, var(--green-500) 100%);
  text-align: center;
}

.cta-content h2 {
  color: var(--white);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-bottom: 16px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 32px;
}

.cta .btn-primary {
  background: var(--white);
  color: var(--green-700);
  border-color: var(--white);
}

.cta .btn-primary:hover {
  background: var(--green-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ===== Contact ===== */
.contact {
  padding: 100px 0;
  background: var(--gray-100);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: var(--white);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-600);
  box-shadow: var(--shadow);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0;
}

.contact-form {
  background: var(--white);
  padding: 36px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 0.95rem;
  border: 1.5px solid var(--gray-300);
  border-radius: 10px;
  background: var(--white);
  color: var(--dark-800);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px rgba(0, 166, 81, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7a6b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* ===== Footer ===== */
.footer {
  background: var(--dark-900);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo-name {
  color: var(--white);
}

.footer-brand .logo-tagline {
  color: rgba(255, 255, 255, 0.5);
}

.footer-brand p {
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 320px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--green-accent);
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .service-card-wide {
    grid-template-columns: 1fr;
  }

  .service-card-wide .service-image {
    min-height: 220px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 70px;
  }

  .nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    padding: 14px 16px;
    text-align: left;
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

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

  .service-features {
    grid-template-columns: 1fr;
  }

  .about-stats {
    flex-direction: column;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .contact-form {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .logo-text .logo-tagline {
    display: none;
  }
}