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

:root {
  --green-dark: #0a2e1a;
  --green-mid: #1a5c30;
  --green-accent: #2ecc71;
  --green-light: #a8f0c6;
  --sand: #f5f0e8;
  --text: #0f1f12;
  --text-light: #4a6355;
  --white: #ffffff;
}

html { scroll-behavior: smooth; }
body { font-family: 'DM Sans', sans-serif; background: var(--sand); color: var(--text); overflow-x: hidden; }

/* ── Navigation ─────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 8vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10,46,26,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(46,204,113,0.15);
}
.nav-logo { font-family: 'Bebas Neue', sans-serif; font-size: 1.5rem; color: var(--green-accent); text-decoration: none; }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--green-accent); }

/* ── Hero ────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  background: var(--green-dark);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 120px 8vw 80px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 80% 50%, rgba(46,204,113,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(46,204,113,0.07) 0%, transparent 60%);
}

.wind-lines { position: absolute; right: 0; top: 0; width: 55%; height: 100%; overflow: hidden; opacity: 0.18; }
.wind-lines span {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green-accent), transparent);
  margin: 28px 0;
  transform: translateX(100%);
  animation: windflow 4s ease-in-out infinite;
}
.wind-lines span:nth-child(2)  { animation-delay: 0.4s; width: 80%; }
.wind-lines span:nth-child(3)  { animation-delay: 0.8s; width: 60%; }
.wind-lines span:nth-child(4)  { animation-delay: 1.2s; width: 90%; }
.wind-lines span:nth-child(5)  { animation-delay: 1.6s; width: 70%; }
.wind-lines span:nth-child(6)  { animation-delay: 2.0s; width: 50%; }
.wind-lines span:nth-child(7)  { animation-delay: 2.4s; width: 85%; }
.wind-lines span:nth-child(8)  { animation-delay: 2.8s; width: 65%; }
.wind-lines span:nth-child(9)  { animation-delay: 3.2s; width: 75%; }
.wind-lines span:nth-child(10) { animation-delay: 3.6s; width: 55%; }

@keyframes windflow {
  0%   { transform: translateX(120%); opacity: 0; }
  20%  { opacity: 1; }
  80%  { opacity: 1; }
  100% { transform: translateX(-20%); opacity: 0; }
}

.hero-tag {
  font-size: 0.75rem; font-weight: 500; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--green-accent); margin-bottom: 24px; position: relative;
  opacity: 0; animation: fadeup 0.8s ease forwards 0.2s;
}
.hero h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: 0.95;
  color: var(--white);
  position: relative;
  opacity: 0; animation: fadeup 0.8s ease forwards 0.4s;
}
.hero h1 span { color: var(--green-accent); }
.hero-sub {
  max-width: 520px; margin-top: 32px; font-size: 1.1rem; font-weight: 300; line-height: 1.7;
  color: rgba(255,255,255,0.7); position: relative;
  opacity: 0; animation: fadeup 0.8s ease forwards 0.6s;
}
.hero-cta {
  margin-top: 48px; display: inline-block; padding: 16px 40px;
  background: var(--green-accent); color: var(--green-dark);
  font-weight: 500; font-size: 0.95rem; letter-spacing: 0.05em;
  text-decoration: none; border-radius: 2px;
  opacity: 0; animation: fadeup 0.8s ease forwards 0.8s;
  transition: background 0.2s, transform 0.2s;
}
.hero-cta:hover { background: var(--green-light); transform: translateY(-2px); }

@keyframes fadeup {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Sections ────────────────────────────────────────── */
section { padding: 100px 8vw; }

.section-label {
  font-size: 0.7rem; font-weight: 500; letter-spacing: 0.35em;
  text-transform: uppercase; color: var(--green-mid); margin-bottom: 16px;
}
h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1; color: var(--green-dark); margin-bottom: 32px;
}
.lead {
  font-size: 1.1rem; font-weight: 400; line-height: 1.8;
  color: var(--text-light); max-width: 680px; margin-bottom: 28px;
}
p { font-size: 1rem; line-height: 1.8; color: var(--text-light); max-width: 680px; margin-bottom: 20px; }
.divider { width: 64px; height: 3px; background: var(--green-accent); margin: 0 0 40px; }

/* ── Highlight box ───────────────────────────────────── */
.highlight {
  background: var(--green-dark); color: var(--white); border-radius: 4px;
  padding: 48px; margin: 48px 0; position: relative; overflow: hidden;
}
.highlight::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 4px; height: 100%; background: var(--green-accent);
}
.highlight h3 { font-family: 'Bebas Neue', sans-serif; font-size: 2rem; color: var(--green-accent); margin-bottom: 20px; }
.highlight p { color: rgba(255,255,255,0.75); max-width: 100%; }

/* ── Steps grid ──────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2px; margin: 40px 0; }
.step { background: var(--white); padding: 32px 24px; border-top: 3px solid var(--green-accent); transition: transform 0.2s, box-shadow 0.2s; }
.step:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.08); }
.step-num { font-family: 'Bebas Neue', sans-serif; font-size: 2.8rem; color: var(--green-light); line-height: 1; margin-bottom: 12px; }
.step h4 { font-size: 0.95rem; font-weight: 500; color: var(--green-dark); margin-bottom: 10px; }
.step p { font-size: 0.88rem; line-height: 1.6; color: var(--text-light); max-width: 100%; margin: 0; }

/* ── Section variants ────────────────────────────────── */
.alt-section { background: var(--white); }

.alt-section-dark { background: var(--green-dark); }
.alt-section-dark h2 { color: var(--green-accent); }
.alt-section-dark .section-label { color: rgba(46,204,113,0.7); }
.alt-section-dark .lead,
.alt-section-dark p { color: rgba(255,255,255,0.72); }
.alt-section-dark .step { background: rgba(255,255,255,0.05); border-top-color: var(--green-accent); }
.alt-section-dark .step h4 { color: var(--white); }
.alt-section-dark .step p { color: rgba(255,255,255,0.6); }
/* FIX: was rgba(46,204,113,0.3) — too faint to read on dark background */
.alt-section-dark .step-num { color: rgba(46,204,113,0.6); font-size: 2rem; }

.alt-section-green { background: var(--green-dark); }
.alt-section-green .section-label { color: rgba(46,204,113,0.7); }
.alt-section-green h2 { color: var(--white); }

/* ── Safety badge ────────────────────────────────────── */
.safety-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(46,204,113,0.1); border: 1px solid var(--green-accent);
  border-radius: 2px; padding: 12px 20px; margin: 16px 0;
  font-size: 0.88rem; font-weight: 500; color: var(--green-mid);
}
.safety-badge::before { content: '✓'; font-size: 1rem; color: var(--green-accent); font-weight: 700; }

/* ── Combo cards (used on dark section) ──────────────── */
.combo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin: 48px 0; }
.combo-card {
  background: rgba(46,204,113,0.07); border-radius: 4px; padding: 32px 20px;
  text-align: center; border: 1px solid rgba(46,204,113,0.2);
  transition: border-color 0.2s, transform 0.2s;
}
.combo-card:hover { border-color: var(--green-accent); transform: translateY(-4px); }
.combo-icon { font-size: 2.2rem; margin-bottom: 14px; }
/* FIX: was var(--green-dark) — invisible on dark section background */
.combo-card h4 { font-family: 'Bebas Neue', sans-serif; font-size: 1.3rem; color: var(--white); margin-bottom: 8px; }
/* FIX: was var(--text-light) — dark colour invisible on dark section background */
.combo-card p { font-size: 0.85rem; color: rgba(255,255,255,0.65); margin: 0; max-width: 100%; }

/* ── Closing box ─────────────────────────────────────── */
.closing-box {
  margin-top: 48px; padding: 40px;
  background: rgba(255,255,255,0.04);
  border-left: 4px solid var(--green-accent); border-radius: 2px;
}
/* FIX: was rgba(255,255,255,0.6) — too low contrast for WCAG AA */
.closing-box p { color: rgba(255,255,255,0.78); font-size: 0.95rem; max-width: 640px; margin: 0; }

/* ── Footer ──────────────────────────────────────────── */
footer {
  background: #060f09; color: rgba(255,255,255,0.4);
  padding: 40px 8vw; display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 16px; font-size: 0.82rem;
}
.footer-logo { font-family: 'Bebas Neue', sans-serif; font-size: 1.4rem; color: var(--green-accent); }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 640px) {
  nav { padding: 16px 5vw; }
  .nav-links { display: none; }
  section { padding: 64px 5vw; }
  .highlight { padding: 28px 20px; }
  footer { flex-direction: column; text-align: center; }
}