/* ============================================================
   Apex Energy — Retrofit & Decarbonisation Consultancy
   Shared stylesheet
   ============================================================ */

:root {
  --ink: #16232E;
  --ink-soft: #3D4F5C;
  --ink-mute: #7E93A2;
  --paper: #F4F6F5;
  --card: #FFFFFF;
  --line: #DDE4E2;
  --green: #1B7F5C;
  --green-dark: #146348;
  --green-soft: #E4F2EC;
  --amber: #C77D1F;
  --amber-soft: #FBF0DE;
  --blue: #2B5D8A;
  --blue-soft: #E7EFF6;
  --header-sub: #A8BAC6;
  --max: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
}

h1, h2, h3, h4, .brand-name, .stat-value {
  font-family: 'Archivo', 'Inter', sans-serif;
  line-height: 1.2;
}

img { max-width: 100%; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */

.site-header {
  background: #FFFFFF;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 10px rgba(22, 35, 46, 0.06);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }

.brand-mark {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--green);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Archivo', sans-serif;
  font-weight: 800; font-size: 20px;
}

.brand-name { color: var(--ink); font-weight: 700; font-size: 18px; }
.brand-sub { color: var(--ink-mute); font-size: 11.5px; letter-spacing: 0.02em; }

.site-nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}

.site-nav a:hover { background: var(--green-soft); color: var(--ink); }
.site-nav a.active { color: var(--green-dark); background: var(--green-soft); }

.site-nav a.nav-cta {
  background: var(--green);
  color: #fff;
  margin-left: 6px;
}
.site-nav a.nav-cta:hover { background: #22986F; }

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(160deg, #FFFFFF 0%, #F0F5F3 55%, #E4F2EC 100%);
  color: var(--ink);
  padding: 88px 0 72px;
}

.hero-kicker {
  display: inline-block;
  background: var(--green-soft);
  border: 1px solid #BFDFD2;
  color: var(--green-dark);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  font-weight: 800;
  max-width: 21ch;
  margin-bottom: 20px;
}

.hero h1 em { font-style: normal; color: var(--green); }

.hero-lede {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--ink-soft);
  max-width: 62ch;
  margin-bottom: 34px;
}

.btn {
  display: inline-block;
  padding: 14px 26px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15.5px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: #22986F; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid #C2CFCA;
  margin-left: 12px;
}
.btn-ghost:hover { border-color: var(--green); }

/* ---------- Stats band ---------- */

.stats-band { background: #E4F2EC; padding: 0 0 56px; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.stat {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 22px 18px;
}

.stat-value { font-size: 34px; font-weight: 800; color: var(--green-dark); }
.stat-label { font-size: 13.5px; color: var(--ink-soft); margin-top: 4px; }

/* ---------- Sections ---------- */

.section { padding: 72px 0; }
.section.alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-kicker {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section h2 {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  margin-bottom: 14px;
  max-width: 28ch;
}

.section-lede { color: var(--ink-soft); max-width: 68ch; font-size: 16.5px; margin-bottom: 40px; }

/* ---------- Cards / services ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.section.alt .card { background: var(--paper); }

.card-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
}

.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 15px; flex: 1; }

.card ul { margin: 12px 0 0; padding-left: 18px; color: var(--ink-soft); font-size: 14.5px; }
.card ul li { margin-bottom: 6px; }

.card .card-link {
  margin-top: 18px;
  color: var(--green);
  font-weight: 700;
  font-size: 14.5px;
  text-decoration: none;
}
.card .card-link:hover { text-decoration: underline; }

/* ---------- Case study cards ---------- */

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.case-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.case-band {
  padding: 22px 26px;
  color: var(--ink);
  background: var(--green-soft);
  border-bottom: 1px solid var(--line);
}

.case-band .case-result { font-family: 'Archivo', sans-serif; font-size: 30px; font-weight: 800; color: var(--green-dark); }
.case-band .case-type { font-size: 12.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); font-weight: 700; }

.case-body { padding: 22px 26px 26px; flex: 1; display: flex; flex-direction: column; }
.case-body h3 { font-size: 18px; margin-bottom: 8px; }
.case-body p { color: var(--ink-soft); font-size: 14.5px; flex: 1; }

.case-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  background: var(--green-soft);
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}

.tag.blue { background: var(--blue-soft); color: var(--blue); }
.tag.amber { background: var(--amber-soft); color: var(--amber); }

/* ---------- Featured case study ---------- */

.feature-split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 860px) { .feature-split { grid-template-columns: 1fr; } }

.playbook {
  background: var(--green-soft);
  color: var(--ink-soft);
  border: 1px solid #BFDFD2;
  border-radius: 16px;
  padding: 28px;
  font-size: 14.5px;
}

.playbook h4 { color: var(--ink); font-size: 15px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px; }
.playbook li { margin: 0 0 10px 18px; }
.playbook .ok { color: var(--green); font-weight: 700; }

/* ---------- Process / pathway ---------- */

.pathway { counter-reset: step; display: grid; gap: 14px; }

.step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 22px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.section.alt .step { background: var(--paper); }

.step-num {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}

.step h3 { font-size: 16px; margin-bottom: 3px; }
.step p { color: var(--ink-soft); font-size: 14.5px; }

/* ---------- Founder ---------- */

.founder-split {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 860px) { .founder-split { grid-template-columns: 1fr; } }

.cred {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.cred:last-child { border-bottom: none; }
.cred .dot { color: var(--green); font-weight: 800; flex-shrink: 0; }

/* ---------- Funding strip ---------- */

.funding-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.funding-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 12px;
  padding: 18px 20px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.funding-item b { color: var(--ink); display: block; margin-bottom: 4px; }

/* ---------- CTA band ---------- */

.cta-band {
  background: linear-gradient(135deg, var(--green-dark) 0%, var(--green) 100%);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.cta-band h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; margin-bottom: 12px; }
.cta-band p { max-width: 60ch; margin: 0 auto 28px; color: #DDF0E8; }
.cta-band .btn { background: #fff; color: var(--green-dark); }
.cta-band .btn:hover { background: #EAF6F1; }

/* ---------- Contact form ---------- */

.contact-split {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 860px) { .contact-split { grid-template-columns: 1fr; } }

.form-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px;
}

.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font: inherit;
  font-size: 15px;
  background: var(--paper);
  color: var(--ink);
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--green);
  background: #fff;
}

.form-note { font-size: 13px; color: var(--ink-mute); margin-top: 14px; }

button.btn { border: none; cursor: pointer; font-family: inherit; }

/* ---------- Footer ---------- */

.site-footer {
  background: #FFFFFF;
  border-top: 1px solid var(--line);
  color: var(--ink-mute);
  padding: 40px 0;
  font-size: 13.5px;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
}

.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--green-dark); }

.footer-nav { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- Page hero (inner pages) ---------- */

.page-hero {
  background: linear-gradient(160deg, #FFFFFF 0%, #F0F5F3 55%, #E4F2EC 100%);
  color: var(--ink);
  padding: 56px 0;
}

.page-hero h1 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; margin-bottom: 12px; }
.page-hero p { color: var(--ink-soft); max-width: 66ch; font-size: 16.5px; }

/* ---------- Tables ---------- */

.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--card); }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 640px;
}

table.data th {
  text-align: left;
  background: var(--green-soft);
  color: var(--ink);
  font-family: 'Archivo', sans-serif;
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 12px 16px;
}

table.data td { padding: 12px 16px; border-top: 1px solid var(--line); color: var(--ink-soft); }
table.data td:first-child { color: var(--ink); font-weight: 600; }

/* ---------- Utilities ---------- */

.mt-40 { margin-top: 40px; }
.center { text-align: center; }

@media (max-width: 700px) {
  .hero { padding: 60px 0 48px; }
  .btn-ghost { margin-left: 0; margin-top: 12px; }
  .site-nav { width: 100%; margin-left: 0; }
}