/* ========= Base Styles ========= */
:root {
  --primary-green: #2e7d32;
  --primary-green-dark: #1b5e20;
  --white: #ffffff;
  --gray-light: #f4f4f4;
  --gray-dark: #444;
  --font-main: 'Roboto', sans-serif;
}

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

body {
  font-family: var(--font-main);
  line-height: 1.6;
  background-color: var(--white);
  color: var(--gray-dark);
}

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* ========= Header ========= */
.header {
  background-color: var(--white);
  border-bottom: 1px solid #ddd;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo__img {
  height: 50px;
  margin-right: 10px;
}

.logo__text {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-green-dark);
}

/* ========= Navigation ========= */
.nav {
  display: flex;
}

.nav__list {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav__item {
  position: relative;
}

.nav__link {
  text-decoration: none;
  color: var(--gray-dark);
  font-weight: 500;
  padding: 0.5rem;
  transition: color 0.3s;
}

.nav__link:hover {
  color: var(--primary-green);
}

.nav__dropdown:hover .dropdown__menu {
  display: block;
}

.dropdown__menu {
  display: none;
  position: absolute;
  top: 2.5rem;
  left: 0;
  background-color: var(--white);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 0.5rem 0;
  z-index: 1000;
}

.dropdown__menu li {
  padding: 0.5rem 1rem;
}

.dropdown__menu li a {
  color: var(--gray-dark);
  text-decoration: none;
  display: block;
}

.dropdown__menu li a:hover {
  background-color: var(--gray-light);
  color: var(--primary-green);
}

/* Mobile Nav Toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger {
  width: 25px;
  height: 3px;
  background-color: var(--primary-green);
  display: block;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  width: 25px;
  height: 3px;
  background-color: var(--primary-green);
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  top: 8px;
}

@media (max-width: 768px) {
  .nav__list {
    display: none;
    flex-direction: column;
    background-color: var(--white);
    position: absolute;
    top: 100%;
    right: 0;
    width: 250px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  }

  .nav--active .nav__list {
    display: flex;
  }

  .nav__toggle {
    display: block;
  }
}

/* ========= Hero Section ========= */
.hero {
  background-color: var(--gray-light);
  padding: 4rem 0;
}

.hero__container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.hero__text {
  flex: 1;
}

.hero__title {
  font-size: 2.5rem;
  color: var(--primary-green-dark);
  margin-bottom: 1rem;
}

.hero__subtitle {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.hero__list {
  list-style: disc;
  margin: 1rem 0 2rem 1.5rem;
}

.hero__image {
  flex: 1;
}

/* ========= Button ========= */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
}

.btn--primary {
  background-color: var(--primary-green);
  color: var(--white);
  transition: background-color 0.3s;
}

.btn--primary:hover {
  background-color: var(--primary-green-dark);
}

/* ========= Stats Section ========= */
.stats {
  background-color: var(--white);
  padding: 4rem 0;
}

.stats__container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.stats__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  flex: 1;
}

.stats__item h2 {
  color: var(--primary-green-dark);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

/* ========= Study Section ========= */
.study {
  background-color: var(--gray-light);
  padding: 4rem 0;
}

.study__container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.study__text {
  flex: 1;
}

.study__text ul {
  list-style: circle;
  margin: 1rem 0 2rem 1.5rem;
}

.study__image {
  flex: 1;
}

/* ========= Footer ========= */
.footer {
  background-color: var(--primary-green-dark);
  color: var(--white);
  padding: 3rem 0 1rem;
}

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

.footer__col {
  flex: 1;
  min-width: 200px;
}

.footer__col h4 {
  margin-bottom: 1rem;
  color: var(--white);
}

.footer__col a {
  color: var(--white);
  text-decoration: none;
}

.footer__col a:hover {
  text-decoration: underline;
}

.footer__bottom {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 1rem;
}