:root {
  --primary: #1f7a4d;
  --primary-dark: #145737;
  --secondary: #f2b705;
  --dark: #14221b;
  --text: #42524a;
  --text-light: #6d7b74;
  --white: #ffffff;
  --bg: #f7faf8;
  --bg-soft: #eef5f1;
  --border: #dbe7df;
  --shadow: 0 12px 30px rgba(20, 34, 27, 0.08);
  --radius: 18px;
  --container: 1200px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Open Sans", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
}

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

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

ul {
  list-style: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

/* Nav özel container — daha geniş */
#navbar .container {
  width: min(100% - 32px, 1400px);
}

.section {
  padding: 90px 0;
}

.section-alt {
  background: var(--bg);
}

.section-header {
  max-width: 760px;
  margin: 0 auto 50px;
  text-align: center;
}

.section-header.left {
  margin-left: 0;
  text-align: left;
}

.section-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(31, 122, 77, 0.12);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.4px;
}

.section-tag.light {
  background: rgba(255, 255, 255, 0.16);
  color: #dff6ea;
}

.section-header h2 {
  font-family: "Montserrat", sans-serif;
  font-size: clamp(2rem, 3vw, 2.8rem);
  line-height: 1.2;
  color: var(--dark);
  margin-bottom: 14px;
}

.section-header p {
  color: var(--text-light);
  font-size: 1.02rem;
}

.section-header.light h2,
.section-header.light p {
  color: var(--white);
}

/* HEADER */
#header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: linear-gradient(90deg, #3f5f4d 0%, #456753 45%, #9aa89d 100%);
  backdrop-filter: blur(10px);
  border-bottom: none;
}

#navbar {
  min-height: 82px;
  display: flex;
  align-items: center;
  background: transparent;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* Contact + social + CTA group in navbar */
.nav-contact-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
  padding-left: 16px;
  border-left: 1px solid rgba(255,255,255,0.22);
}

.nav-contact-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 0.8rem;
  line-height: 1.3;
}

.nav-contact-info a {
  color: rgba(255,255,255,0.88);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-contact-info a:hover {
  color: #dff6ea;
}

.nav-contact-info i {
  margin-right: 5px;
  color: #7ef0ac;
}

.nav-social {
  display: flex;
  gap: 7px;
}

.nav-social a {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.78);
  font-size: 0.7rem;
  transition: var(--transition);
}

.nav-social a:hover {
  background: #7ef0ac;
  border-color: #7ef0ac;
  color: #14221b;
}

.logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 116px;
  width: auto;
  object-fit: contain;
}

.logo-img-footer {
  height: 104px;
  opacity: 0.92;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-link {
  position: relative;
  font-weight: 600;
  color: #ffffff;
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 0;
  height: 2px;
  background: #7ef0ac;
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.btn-primary,
.btn-outline,
.btn-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2f9b66);
  color: var(--white);
  box-shadow: 0 14px 30px rgba(31, 122, 77, 0.25);
}

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

.btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: var(--white);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-white {
  background: var(--white);
  color: var(--primary);
  font-weight: 700;
}

.nav-cta {
  white-space: nowrap;
}

.hamburger {
  display: none;
  width: 48px;
  height: 48px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 3px;
  margin: 5px auto;
  border-radius: 999px;
  background: #ffffff;
  transition: var(--transition);
}

/* HERO */
#hero {
  position: relative;
  height: min(92vh, 840px);
  min-height: 640px;
  overflow: hidden;
  background: linear-gradient(90deg, #3f5f4d 0%, #456753 45%, #9aa89d 100%);
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(63, 95, 77, 0.92) 0%,
    rgba(69, 103, 83, 0.78) 45%,
    rgba(154, 168, 157, 0.58) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 720px;
  color: var(--white);
}

.hero-badge {
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 18px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  color: #ecfff5;
  font-weight: 700;
  font-size: 0.92rem;
}

.hero-content h1 {
  font-family: "Montserrat", sans-serif;
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 1.08;
  margin-bottom: 18px;
}

.hero-content p {
  max-width: 640px;
  font-size: 1.08rem;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 30px;
}

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

.hero-controls {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 14px;
}

.hero-controls button {
  border: 0;
  cursor: pointer;
}

#heroPrev,
#heroNext {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  color: var(--white);
  backdrop-filter: blur(8px);
}

.hero-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
}

.dot.active {
  background: var(--secondary);
}

/* ABOUT */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}

.about-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.about-card h3 {
  font-family: "Montserrat", sans-serif;
  color: var(--dark);
  margin-bottom: 14px;
  font-size: 1.3rem;
}

.about-card p + p {
  margin-top: 12px;
}

.about-large {
  grid-row: span 2;
}

/* CIRCULAR */
.circular-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 28px;
  align-items: stretch;
}

.circular-text,
.point-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.circular-text {
  padding: 34px;
}

.circular-text p + p {
  margin-top: 16px;
}

.circular-points {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.point-card {
  padding: 28px 24px;
}

.point-card i {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(31, 122, 77, 0.1);
  color: var(--primary);
  font-size: 1.35rem;
  margin-bottom: 18px;
}

.point-card h4 {
  font-family: "Montserrat", sans-serif;
  color: var(--dark);
  margin-bottom: 8px;
}

/* SERVICES */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
}

.service-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(
    135deg,
    rgba(31, 122, 77, 0.12),
    rgba(242, 183, 5, 0.14)
  );
  color: var(--primary);
  font-size: 1.35rem;
  margin-bottom: 18px;
}

.service-card h3 {
  font-family: "Montserrat", sans-serif;
  color: var(--dark);
  font-size: 1.2rem;
  margin-bottom: 10px;
}

/* CERTS */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  padding: 30px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--border);
  text-align: center;
  box-shadow: var(--shadow);
}

.cert-card i {
  font-size: 2rem;
  color: var(--secondary);
  margin-bottom: 16px;
}

.cert-card h4 {
  font-family: "Montserrat", sans-serif;
  color: var(--dark);
  margin-bottom: 10px;
}

/* SUSTAINABILITY */
.sustainability-section {
  background:
    linear-gradient(rgba(20, 34, 27, 0.84), rgba(20, 34, 27, 0.84)),
    url("../images/hero2.jpg") center/cover no-repeat;
}

.sustainability-box {
  border-radius: 28px;
  padding: 56px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.sustainability-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 10px;
}

.s-item {
  padding: 26px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.9);
}

.s-item i {
  font-size: 1.7rem;
  color: var(--secondary);
  margin-bottom: 14px;
}

.s-item h4 {
  font-family: "Montserrat", sans-serif;
  color: var(--white);
  margin-bottom: 8px;
}

/* FAQ */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--white);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-item + .faq-item {
  margin-top: 16px;
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  background: transparent;
  border: 0;
  text-align: left;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question i {
  transition: var(--transition);
}

.faq-item.active .faq-question i {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer p {
  padding: 0 24px 22px;
  color: var(--text-light);
}

/* CONTACT */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
}

.contact-form-wrap,
.contact-info-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
  color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  background: #fbfdfb;
  color: var(--dark);
  outline: none;
  transition: var(--transition);
}

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

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 20px;
}

.btn-full {
  width: 100%;
}

.form-message {
  margin-top: 16px;
  font-weight: 700;
}

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

.contact-info-item + .contact-info-item {
  margin-top: 20px;
}

.ci-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(31, 122, 77, 0.1);
  color: var(--primary);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.map-embed {
  margin-top: 24px;
  overflow: hidden;
  border-radius: 18px;
}

/* FOOTER */
#footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.82);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 28px;
  padding: 70px 0 30px;
}

.logo-white {
  margin-bottom: 18px;
}

.footer-col h4 {
  color: var(--white);
  font-family: "Montserrat", sans-serif;
  margin-bottom: 16px;
}

.footer-col ul li + li,
.footer-col address p + p {
  margin-top: 10px;
}

.footer-col a:hover {
  color: var(--secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0;
  text-align: center;
  font-size: 0.95rem;
}

/* BACK TO TOP */
.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 10px 24px rgba(31, 122, 77, 0.3);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 998;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 1100px) {
  .about-grid,
  .services-grid,
  .cert-grid,
  .sustainability-items,
  .footer-grid,
  .contact-grid,
  .circular-layout {
    grid-template-columns: 1fr 1fr;
  }

  .about-large {
    grid-row: auto;
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .nav-cta {
    display: none;
  }

  .nav-contact-group {
    display: none;
  }

  .hamburger {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 1px);
    left: 16px;
    right: 16px;
    background: rgba(20, 34, 27, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: flex-start;
    padding: 18px;
    gap: 14px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
  }

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

  #navbar {
    position: relative;
  }

  .services-grid,
  .cert-grid,
  .sustainability-items,
  .contact-grid,
  .form-row,
  .circular-layout,
  .circular-points,
  .footer-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .section-alt {
    padding: 70px 0;
  }

  .hero-content h1 {
    font-size: 2.6rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .sustainability-box {
    padding: 34px 24px;
  }
}

@media (max-width: 640px) {
  #hero {
    min-height: 580px;
    height: 86vh;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .section-header h2 {
    font-size: 1.9rem;
  }

  .about-card,
  .service-card,
  .cert-card,
  .contact-form-wrap,
  .contact-info-wrap,
  .circular-text,
  .point-card {
    padding: 22px;
  }
}