.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--color-neutral-200);
}

.header-inner {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-neutral-950);
  font-size: 1.15rem;
  font-weight: 850;
  text-decoration: none;
}

.logo-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  color: var(--color-white);
  background: var(--color-primary-800);
  border-radius: 50%;
}

.main-nav ul,
.footer-links {
  display: flex;
  gap: var(--space-5);
  padding: 0;
  margin: 0;
  list-style: none;
}

.main-nav a {
  color: var(--color-neutral-800);
  font-weight: 700;
  text-decoration: none;
}

.main-nav a:hover {
  color: var(--color-primary-800);
  text-decoration: underline;
}

.menu-toggle {
  display: none;
  padding: 0.65rem 0.8rem;
  color: var(--color-neutral-950);
  background: var(--color-white);
  border: 2px solid var(--color-neutral-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.hero {
  overflow: hidden;
  padding-block: clamp(4rem, 9vw, 8rem);
  background: linear-gradient(135deg, var(--color-primary-50), var(--color-white));
}

.hero-grid {
  display: grid;
  align-items: center;
  gap: var(--space-10);
  grid-template-columns: 1.1fr 0.9fr;
}

.hero-text {
  max-width: 650px;
  color: var(--color-neutral-700);
  font-size: var(--font-size-lg);
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.15rem;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition), background-color var(--transition);
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: var(--color-white);
  background: var(--color-primary-800);
}

.button-primary:hover {
  color: var(--color-white);
  background: var(--color-primary-900);
}

.button-secondary {
  color: var(--color-primary-900);
  background: var(--color-white);
  border-color: var(--color-primary-800);
}

.hero-illustration {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
}

.recycle-circle {
  display: grid;
  width: min(75%, 320px);
  aspect-ratio: 1;
  place-items: center;
  color: var(--color-white);
  background: var(--color-primary-800);
  border-radius: 50%;
  font-size: 7rem;
  box-shadow: var(--shadow-md);
}

.illustration-card {
  position: absolute;
  padding: 0.7rem 1rem;
  color: var(--color-neutral-950);
  background: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  font-weight: 800;
}

.card-one { top: 15%; left: 0; }
.card-two { right: 0; top: 40%; }
.card-three { bottom: 8%; left: 12%; }

.impact-section {
  padding-block: var(--space-12);
  background: var(--color-neutral-950);
  color: var(--color-white);
}

.impact-section .eyebrow {
  color: #a8e2c7;
}

.section-heading {
  max-width: 700px;
  margin-bottom: var(--space-8);
}

.section-heading.centered {
  margin-inline: auto;
  text-align: center;
}

.section-heading > p:last-child {
  color: var(--color-neutral-700);
}

.impact-section .section-heading > p:last-child {
  color: #e0e7e3;
}

.stats-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(3, 1fr);
}

.stat-card {
  padding: var(--space-6);
  background: #24312b;
  border: 1px solid #46554e;
  border-radius: var(--radius-md);
}

.stat-card p {
  color: #e0e7e3;
}

.stat-icon {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  margin-bottom: var(--space-5);
  color: var(--color-neutral-950);
  background: #a8e2c7;
  border-radius: 50%;
  font-weight: 900;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.filter-button {
  min-height: 44px;
  padding: 0.6rem 0.9rem;
  color: var(--color-neutral-800);
  background: var(--color-white);
  border: 2px solid var(--color-neutral-300);
  border-radius: 999px;
  cursor: pointer;
  font-weight: 750;
}

.filter-button:hover,
.filter-button.is-active {
  color: var(--color-white);
  background: var(--color-primary-800);
  border-color: var(--color-primary-800);
}

.materials-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(2, 1fr);
}


.materials-image {
  max-width: 100%;
  margin-bottom: var(--spacing-6);
  overflow: hidden;
}

.materials-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.material-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.material-card[hidden] {
  display: none;
}

.material-icon {
  display: grid;
  width: 3.25rem;
  height: 3.25rem;
  place-items: center;
  color: var(--color-white);
  background: var(--color-primary-800);
  border-radius: var(--radius-md);
  font-size: 1.6rem;
  font-weight: 900;
}

.tip {
  padding: var(--space-3);
  color: var(--color-neutral-800);
  background: var(--color-neutral-100);
  border-left: 4px solid var(--color-primary-700);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--font-size-sm);
}

.two-columns {
  display: grid;
  align-items: start;
  gap: var(--space-10);
  grid-template-columns: 0.8fr 1.2fr;
}

.steps-list {
  display: grid;
  gap: var(--space-4);
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
}

.steps-list h3 {
  margin-bottom: var(--space-2);
}

.steps-list p {
  margin: 0;
  color: var(--color-neutral-700);
}

.step-number {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  color: var(--color-white);
  background: var(--color-primary-800);
  border-radius: 50%;
  font-weight: 900;
}

.faq-section {
  background: var(--color-neutral-50);
}

.faq-list {
  display: grid;
  gap: var(--space-3);
}

details {
  padding: 0 var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
}

summary {
  padding-block: var(--space-5);
  color: var(--color-neutral-950);
  cursor: pointer;
  font-weight: 800;
}

details p {
  padding-bottom: var(--space-5);
  margin: 0;
  color: var(--color-neutral-700);
}

.contact-section {
  background: var(--color-primary-50);
}

.contact-grid {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 0.8fr 1.2fr;
}

.accessibility-note {
  padding: var(--space-5);
  margin-top: var(--space-6);
  color: var(--color-neutral-800);
  background: var(--color-white);
  border: 1px solid var(--color-neutral-300);
  border-left: 5px solid var(--color-primary-800);
  border-radius: var(--radius-md);
}

.accessibility-note p {
  margin: var(--space-2) 0 0;
}

.contact-form {
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.form-field {
  margin-bottom: var(--space-5);
}

.form-field label,
.checkbox-field {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  color: var(--color-neutral-950);
  background: var(--color-white);
  border: 2px solid var(--color-neutral-300);
  border-radius: var(--radius-sm);
}

input:focus,
textarea:focus {
  border-color: var(--color-primary-800);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--color-error);
}

.form-field small {
  display: block;
  margin-top: var(--space-1);
  color: var(--color-neutral-700);
}

.field-error {
  display: block;
  min-height: 1.4rem;
  margin-top: var(--space-1);
  color: var(--color-error);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.checkbox-field {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
}

.checkbox-field input {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.2rem;
}

.button-full {
  width: 100%;
}

.form-status {
  min-height: 1.6rem;
  margin-top: var(--space-4);
  font-weight: 750;
}

.form-status.success {
  color: var(--color-success);
}

.form-status.error {
  color: var(--color-error);
}

.site-footer {
  padding-top: var(--space-10);
  color: #e7eeea;
  background: var(--color-neutral-950);
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1.5fr 1fr 1fr;
}

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

.footer-title {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-base);
}

.footer-links {
  display: grid;
  gap: var(--space-2);
}

.footer-links a,
.site-footer a {
  color: #d8e5df;
}

.footer-grid p {
  color: #c3d0ca;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-5);
  margin-top: var(--space-8);
  border-top: 1px solid #3d4b44;
}

.footer-bottom p {
  margin: 0;
}