/* ==========================================================================
   Sustainol Solutions — Design System
   ========================================================================== */

:root {
  /* Brand palette (derived from logo) */
  --c-primary: #63bf3d;
  --c-primary-dark: #4c8b2e;
  --c-primary-light: #eaf6e3;
  --c-charcoal: #4a4a4a;
  --c-charcoal-light: #7b7979;
  --c-ink: #26292b;
  --c-bg: #ffffff;
  --c-bg-alt: #f6f8f6;
  --c-bg-dark: #21231f;
  --c-border: #e6e9e4;
  --c-white: #ffffff;

  /* Type */
  --font-heading: "Poppins", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;

  /* Spacing / shape */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(38, 41, 43, 0.06);
  --shadow-md: 0 10px 30px rgba(38, 41, 43, 0.1);
  --shadow-lg: 0 20px 50px rgba(38, 41, 43, 0.16);
  --container-w: 1180px;
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.25;
}

h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }

p { color: var(--c-charcoal); }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 96px 0; }
section.tight { padding: 30px 0 65px 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-primary-dark);
  background: var(--c-primary-light);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { margin-top: 14px; font-size: 1.05rem; }

.bg-alt { background: var(--c-bg-alt); }
.bg-dark { background: var(--c-bg-dark); color: #d9dcd6; }
.bg-dark h2, .bg-dark h3 { color: #fff; }
.bg-dark p { color: #b7bcb2; }

.text-center { text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 28px;
  border-radius: 999px;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(99, 191, 61, 0.3);
}
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: 0 12px 24px rgba(76, 139, 46, 0.35); }

.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.35);
  color: inherit;
}
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }

.btn-dark {
  background: var(--c-ink);
  color: #fff;
}
.btn-dark:hover { background: var(--c-primary-dark); transform: translateY(-2px); }

.btn-sm { padding: 9px 20px; font-size: 0.85rem; }

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 82px;
}

.navbar .logo img { height: 55px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 38px;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-ink);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--c-primary);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--c-primary-dark); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.nav-cta { display: flex; align-items: center; gap: 20px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--c-ink); border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 90px 0 50px;
  background:
    radial-gradient(circle at 85% 10%, rgba(99,191,61,0.14), transparent 55%),
    linear-gradient(180deg, #fbfdfa 0%, #ffffff 100%);
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero h1 { margin-bottom: 20px; }
.hero h1 span { color: var(--c-primary-dark); }
.hero p.lead { font-size: 1.12rem; max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.hero-stats div strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--c-ink);
}
.hero-stats div span { font-size: 0.85rem; color: var(--c-charcoal-light); }

.hero-visual {
  position: relative;
  aspect-ratio: 1/1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual .ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary-light), #fff);
  box-shadow: var(--shadow-lg);
}
.hero-visual img.mark {
  position: relative;
  width: 70%;
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.12));
}
.hero-visual .float-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 14px 18px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-visual .float-card.c1 { top: 10%; left: -6%; }
.hero-visual .float-card.c2 { bottom: 12%; right: -8%; }
.hero-visual .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-primary); }

/* Simple page header (for inner pages) */
.page-header {
  padding: 70px 0 60px;
  background: linear-gradient(180deg, #fbfdfa 0%, #ffffff 100%);
  text-align: center;
}
.page-header .eyebrow { margin-bottom: 14px; }
.page-header p { max-width: 640px; margin: 16px auto 0; font-size: 1.05rem; }

/* ---------- Cards / grids ---------- */
.grid {
  display: grid;
  gap: 26px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: transparent; }

.card .icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--c-primary-light);
  color: var(--c-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
}

.card h3 { margin-bottom: 10px; font-size: 1.1rem; }
.card p { font-size: 0.95rem; margin: 0; }

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.98rem;
  color: var(--c-charcoal);
}
.check-list li:last-child { border-bottom: none; }
.check-list li .tick {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--c-primary-light);
  color: var(--c-primary-dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  margin-top: 2px;
}

/* Pill tags for industries */
.tag-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.tag-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.tag-card:hover {
  border-color: var(--c-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.tag-card .icon {
  width: 46px; height: 46px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--c-primary-light);
  color: var(--c-primary-dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.tag-card h3 { font-size: 1rem; margin-bottom: 6px; }
.tag-card p { font-size: 0.85rem; margin: 0; }

/* Two column feature row */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-row.reverse .feature-visual { order: 2; }
.feature-visual {
  background: var(--c-bg-alt);
  border-radius: var(--radius-lg);
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-visual img { width: 100%;border-radius: 20px; }

/* CTA band */
.cta-band {
  background: linear-gradient(120deg, var(--c-ink) 0%, #2f3a29 100%);
  border-radius: var(--radius-lg);
  padding: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  color: #fff;
}
.cta-band h2 { color: #fff; margin-bottom: 10px; }
.cta-band p { color: #c4c9bd; margin: 0; max-width: 460px; }
.cta-band .actions { display: flex; gap: 14px; flex-shrink: 0; }

/* ---------- Forms ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-ink);
}
.form-group input,
.form-group select,
.form-group textarea {
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--c-ink);
  background: #fff;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--c-primary);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.card .form-note {
  font-size: 0.85rem;
  color: var(--c-charcoal-light);
  margin-top: 14px;
}

.form-status {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-heading);
  font-weight: 500;
}
.form-status.success { display: block; background: var(--c-primary-light); color: var(--c-primary-dark); }
.form-status.error { display: block; background: #fdeceb; color: #b3261e; }

.contact-info-card {
  background: var(--c-ink);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 44px;
}
.contact-info-card h3 { color: #fff; margin-bottom: 6px; }
.contact-info-card p { color: #b7bcb2; }
.contact-info-list { margin-top: 30px; display: flex; flex-direction: column; gap: 24px; }
.contact-info-list li { display: flex; gap: 16px; align-items: flex-start; }
.contact-info-list .icon {
  width: 42px; height: 42px; flex-shrink: 0;
  border-radius: 50%;
  background: rgba(99,191,61,0.18);
  color: var(--c-primary);
  display: flex; align-items: center; justify-content: center;
}
.contact-info-list strong { display: block; font-family: var(--font-heading); font-size: 0.95rem; color: #fff; }
.contact-info-list span, .contact-info-list a { font-size: 0.88rem; color: #b7bcb2; }
.contact-info-list a:hover { color: var(--c-primary); }

.contact-grid {
  display: grid;
  align-items: start;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
}
.contact-form-card { padding: 44px; }

/* ---------- Footer ---------- */
.footer {
  background: var(--c-bg-dark);
  color: #b7bcb2;
  padding: 72px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer .logo img { height: 44px; margin-bottom: 16px; }
.footer p { color: #929892; font-size: 0.92rem; max-width: 320px; }
.footer h4 {
  color: #fff;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer ul li { margin-bottom: 12px; }
.footer ul li a { color: #b7bcb2; font-size: 0.92rem; transition: color var(--transition); }
.footer ul li a:hover { color: var(--c-primary); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 0.85rem;
  color: #7c8178;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* ---------- Utilities ---------- */
.mt-0 { margin-top: 0; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .tag-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-band { flex-direction: column; text-align: center; }
}

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { max-width: 360px; margin: 0 auto; }
  .feature-row, .feature-row.reverse { grid-template-columns: 1fr; }
  .feature-row.reverse .feature-visual { order: 0; }
  .grid-2, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .hero { padding-top: 50px; }
  .nav-links, .nav-cta .btn-outline, .nav-cta .btn-primary { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 82px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px 30px;
    box-shadow: var(--shadow-md);
    gap: 20px;
  }
  section { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4, .tag-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 40px 28px; }
  .cta-band .actions { flex-direction: column; width: 100%; }
  .cta-band .actions .btn { width: 100%; justify-content: center; }
  .contact-form-card { padding: 28px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}