/* ECube Green — shared stylesheet
   Low carbon: system fonts only, muted palette, no background images */
:root {
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --ink: #141810;
  --ink-soft: #3A4237;
  --muted: #6B7A6A;
  --rule: #D0DBD0;
  --bg: #F4F7F4;
  --white: #FDFFFD;
  --green: #1D6B4A;
  --green-light: #2A8A5E;
  --green-pale: #E6F2EB;
  --green-mid: #4DAA7A;
  --green-dark: #0F4A32;
  --dark: #0E120E;
  --dark-soft: #1C221C;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--bg); color: var(--ink); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }

nav { position: sticky; top: 0; z-index: 100; background: rgba(244,247,244,0.96); border-bottom: 1px solid var(--rule); padding: 0 32px; height: 60px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-mark { width: 28px; height: 28px; }
.logo-text { font-family: var(--serif); font-size: 17px; color: var(--ink); }
.logo-text span { color: var(--green); }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a { font-size: 13px; color: var(--ink-soft); text-decoration: none; transition: color 0.15s; }
.nav-links a:hover, .nav-links a.active { color: var(--green); }
.nav-cta { font-size: 13px; font-weight: 600; color: var(--white) !important; background: var(--green); padding: 7px 18px; border-radius: 2px; transition: background 0.15s !important; }
.nav-cta:hover { background: var(--green-light) !important; }

.page-hero { padding: 72px 32px; border-bottom: 1px solid var(--rule); display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: end; }
.eyebrow { font-size: 10px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--green); margin-bottom: 14px; }
.page-headline { font-family: var(--serif); font-size: clamp(28px, 3.5vw, 46px); line-height: 1.1; color: var(--ink); letter-spacing: -0.02em; }
.page-sub { font-size: 15px; color: var(--ink-soft); line-height: 1.75; }

.section-label { font-size: 10px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--green); margin-bottom: 12px; }
.section-headline { font-family: var(--serif); font-size: clamp(24px, 2.8vw, 38px); line-height: 1.15; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 12px; }
.section-body { font-size: 14px; color: var(--ink-soft); line-height: 1.75; max-width: 580px; margin-bottom: 40px; }

.btn-ghost { font-size: 13px; color: var(--ink-soft); text-decoration: none; border-bottom: 1px solid var(--rule); padding-bottom: 2px; transition: color 0.15s, border-color 0.15s; }
.btn-ghost:hover { color: var(--green); border-color: var(--green); }
.btn-primary { display: inline-block; font-size: 13px; font-weight: 600; color: #fff; background: var(--green); padding: 12px 24px; border-radius: 2px; text-decoration: none; transition: background 0.15s; }
.btn-primary:hover { background: var(--green-light); }

footer { background: var(--dark-soft); padding: 28px 32px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-left { font-family: var(--serif); font-size: 14px; color: rgba(255,255,255,0.3); }
.footer-left span { color: var(--green-mid); }
.footer-links { display: flex; gap: 24px; list-style: none; }
.footer-links a { font-size: 12px; color: rgba(255,255,255,0.25); text-decoration: none; transition: color 0.15s; }
.footer-links a:hover { color: rgba(255,255,255,0.65); }
.carbon-badge { font-size: 11px; color: rgba(255,255,255,0.3); display: flex; align-items: center; gap: 6px; }
.carbon-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green-mid); opacity: 0.7; }

@media (max-width: 900px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  .page-hero { grid-template-columns: 1fr; padding: 48px 20px; gap: 24px; }
  footer { flex-direction: column; gap: 12px; text-align: center; padding: 24px 20px; }
}