/* ECODUST METALS — Main stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #1b5e20;
  --primary-light: #2e7d32;
  --accent: #81c784;
  --dark: #263238;
  --text: #37474f;
  --light: #f1f8e9;
  --white: #ffffff;
  --gray: #78909c;
  --max-width: 1200px;
  --radius: 8px;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
}

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

a {
  color: var(--primary-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header & Navigation */
header {
  background: var(--white);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--dark);
}

.logo img {
  height: 46px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  text-decoration: none;
  border-bottom-color: var(--accent);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--dark);
  border-radius: 2px;
  transition: 0.3s;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, rgba(27,94,32,0.92), rgba(38,50,56,0.9)),
              url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%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");
  color: var(--white);
  padding: 7rem 1.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.15;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 760px;
  margin: 0 auto 2rem;
  opacity: 0.92;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  border: 2px solid transparent;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

.btn-secondary:hover {
  background: var(--white);
  color: var(--primary);
}

/* Sections */
section {
  padding: 5rem 1.5rem;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  color: var(--dark);
  margin-bottom: 0.75rem;
}

.section-title p {
  color: var(--gray);
  max-width: 640px;
  margin: 0 auto;
}

/* Cards */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  transition: transform 0.3s, box-shadow 0.3s;
  border-top: 4px solid var(--accent);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.12);
}

.card h3 {
  color: var(--dark);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.card p {
  color: var(--text);
  margin-bottom: 1rem;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--light);
  color: var(--primary);
  display: grid;
  place-items: center;
  margin-bottom: 1.25rem;
}

.card-icon svg {
  width: 28px;
  height: 28px;
}

/* About / Content layouts */
.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
  align-items: center;
}

.lead {
  font-size: 1.15rem;
  color: var(--dark);
  margin-bottom: 1rem;
}

.values-list {
  list-style: none;
  margin-top: 1.5rem;
}

.values-list li {
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.values-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-light);
  flex-shrink: 0;
}

/* Impact / Stats */
.impact {
  background: var(--light);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.stat-label {
  color: var(--gray);
  margin-top: 0.5rem;
  font-weight: 500;
}

/* Process flow */
.process {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.process-step {
  background: var(--white);
  border: 2px solid #e0e0e0;
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -1.3rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1.5rem;
  font-weight: 700;
}

.step-number {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: start;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 500;
  color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #cfd8dc;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(46,125,50,0.12);
}

.form-status {
  margin-top: 1rem;
  padding: 0.75rem;
  border-radius: var(--radius);
  display: none;
}

.form-status.success {
  display: block;
  background: #c8e6c9;
  color: #1b5e20;
}

.form-status.error {
  display: block;
  background: #ffcdd2;
  color: #b71c1c;
}

.contact-info h3 {
  margin-bottom: 1rem;
  color: var(--dark);
}

.contact-info p {
  margin-bottom: 0.75rem;
}

.map-placeholder {
  width: 100%;
  height: 240px;
  background: #eceff1;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: var(--gray);
  margin-top: 1.5rem;
}

/* Footer */
footer {
  background: var(--dark);
  color: #b0bec5;
  padding: 4rem 1.5rem 1.5rem;
}

.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
}

footer h4 {
  color: var(--white);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

footer ul {
  list-style: none;
}

footer li {
  margin-bottom: 0.5rem;
}

footer a {
  color: #b0bec5;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid #455a64;
  text-align: center;
  font-size: 0.9rem;
}

/* Utilities */
.text-center {
  text-align: center;
}

.mt-2 {
  margin-top: 2rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    gap: 0;
    padding: 1rem 1.5rem;
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    border-bottom: 1px solid #eceff1;
  }

  .nav-links a {
    display: block;
    padding: 0.9rem 0;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 5rem 1.5rem;
  }

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

  .process-step:not(:last-child)::after {
    content: '↓';
    right: 50%;
    top: 100%;
    transform: translateX(50%);
  }
}