/* ============================================================
   EME ENGINEERING LIMITED — main stylesheet
   Dark theme · emerald accent · left sidebar + full-bleed hero
   ============================================================ */

:root {
  --bg: #0A0E14;
  --bg-elev: #0F1620;
  --surface: #141D2A;
  --surface-2: #1A2534;
  --border: #233246;
  --border-soft: #1C2836;
  --text: #E9EDF2;
  --muted: #9AA7B8;
  --muted-2: #7C8A9C;
  --accent: #34E09B;
  --accent-strong: #1FC98A;
  --accent-ink: #062318;
  --accent-2: #F472B6;
  --accent-2-ink: #2A0A1E;
  --shadow: 0 18px 40px #000000;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-size: 16px;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ---------------- App shell & sidebar layout ---------------- */

.app-shell {
  display: grid;
  grid-template-columns: 272px 1fr;
  min-height: 100vh;
}

.sidebar {
  grid-column: 1;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-elev);
  border-right: 1px solid var(--border-soft);
  padding: 32px 26px;
  z-index: 50;
}

.main-content {
  grid-column: 2;
  min-width: 0;
}

/* ---------------- Sidebar brand ---------------- */

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: var(--accent-ink);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.5px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.4px;
}

.brand-tag {
  color: var(--muted-2);
  font-size: 12px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

/* ---------------- Sidebar nav ---------------- */

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 11px;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 20px;
  height: 2px;
  background-color: var(--text);
  border-radius: 2px;
}

.site-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-nav-link {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 15px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav-link:hover,
.site-nav-link.active {
  background-color: var(--surface);
  color: var(--accent);
}

.sidebar-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
}

.sidebar-email {
  color: var(--accent);
  font-size: 13px;
  word-break: break-all;
}

.sidebar-phone,
.sidebar-loc {
  color: var(--muted-2);
  font-size: 13px;
}

/* ---------------- Shared section primitives ---------------- */

.section-head {
  max-width: 720px;
  margin-bottom: 44px;
}

.section-kicker {
  display: inline-block;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 34px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.section-sub {
  color: var(--muted);
  font-size: 17px;
}

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.2s ease;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover {
  background-color: var(--accent-strong);
  transform: translateY(-2px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---------------- Hero band (full-bleed) ---------------- */

.hero-band {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background:
    radial-gradient(circle at 78% 22%, #1E3A4A 0%, transparent 46%),
    radial-gradient(circle at 12% 88%, #1B3B33 0%, transparent 44%),
    linear-gradient(160deg, #0C1320 0%, #0A0E14 68%);
  border-bottom: 1px solid var(--border-soft);
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 40, 54, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 40, 54, 0.35) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
  padding: 96px 64px;
}

.hero-eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 22px;
}

.hero-title {
  font-size: 54px;
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 26px;
}

.hero-lead {
  color: var(--muted);
  font-size: 19px;
  line-height: 1.75;
  max-width: 640px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 46px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.hero-fact {
  display: flex;
  flex-direction: column;
}

.hero-fact-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
}

.hero-fact-label {
  color: var(--muted-2);
  font-size: 13px;
}

/* ---------------- Field notes (numbered list) ---------------- */

.field-notes {
  padding: 96px 64px;
  border-bottom: 1px solid var(--border-soft);
}

.notes-list {
  display: flex;
  flex-direction: column;
}

.note-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 28px;
  padding: 30px 0;
  border-top: 1px solid var(--border-soft);
}

.note-index {
  font-size: 42px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -1px;
}

.note-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.note-text {
  color: var(--muted);
  font-size: 16px;
  max-width: 660px;
}

/* ---------------- Signal stats band ---------------- */

.signal-band {
  background: linear-gradient(120deg, #10231E 0%, #0D1820 100%);
  border-bottom: 1px solid var(--border-soft);
}

.signal-inner {
  padding: 88px 64px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.stat-cell {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-value {
  font-size: 40px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
}

.stat-label {
  color: var(--muted);
  font-size: 14px;
}

/* ---------------- Engagement path (timeline) ---------------- */

.engagement-path {
  padding: 96px 64px;
  border-bottom: 1px solid var(--border-soft);
}

.path-list {
  list-style: none;
  counter-reset: path;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.path-step {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 14px;
  padding: 28px 24px;
  position: relative;
}

.path-phase {
  display: inline-block;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.path-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.path-text {
  color: var(--muted);
  font-size: 15px;
}

/* ---------------- Service catalog (comparison table) ---------------- */

.service-catalog {
  padding: 96px 64px;
  border-bottom: 1px solid var(--border-soft);
}

.catalog-table {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}

.catalog-head,
.catalog-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
}

.catalog-head {
  background-color: var(--surface-2);
}

.catalog-row {
  border-top: 1px solid var(--border-soft);
}

.catalog-row:nth-child(odd) {
  background-color: var(--bg-elev);
}

.catalog-cell {
  padding: 18px 22px;
  font-size: 15px;
  color: var(--muted);
  border-right: 1px solid var(--border-soft);
}

.catalog-cell:last-child {
  border-right: none;
}

.catalog-cell.feature {
  color: var(--text);
  font-weight: 600;
}

.catalog-cell.plan {
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
  text-align: center;
}

.catalog-cell.plan.featured {
  color: var(--accent-ink);
  background-color: var(--accent);
}

/* ---------------- FAQ panel ---------------- */

.faq-panel {
  padding: 96px 64px;
  border-bottom: 1px solid var(--border-soft);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 840px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background-color: var(--surface);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-question::after {
  content: "+";
  font-size: 24px;
  color: var(--accent);
  font-weight: 400;
  line-height: 1;
}

.faq-item.open .faq-question::after {
  content: "−";
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 320px;
}

.faq-answer p {
  padding: 0 24px 22px;
  color: var(--muted);
  font-size: 15px;
}

/* ---------------- Contact / conversation ---------------- */

.start-conversation {
  padding: 96px 64px;
}

.conversation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.conversation-text {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 28px;
}

.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-label {
  color: var(--muted-2);
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.contact-list a,
.contact-list span:not(.contact-label) {
  color: var(--text);
  font-size: 16px;
}

.contact-list a {
  color: var(--accent);
}

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.form-field input,
.form-field textarea {
  background-color: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 13px 15px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-status {
  color: var(--accent);
  font-size: 14px;
  min-height: 20px;
}

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

.site-footer {
  background-color: var(--bg-elev);
  border-top: 1px solid var(--border);
  padding: 64px 64px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-soft);
}

.footer-brand .brand-name {
  display: block;
  margin-bottom: 10px;
}

.footer-tag {
  color: var(--muted-2);
  font-size: 14px;
  max-width: 260px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-title {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.footer-col a {
  color: var(--muted);
  font-size: 14px;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  color: var(--muted-2);
  font-size: 13px;
}

/* ---------------- Scroll reveal ---------------- */

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

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------- Responsive ---------------- */

@media (max-width: 1080px) {
  .path-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    grid-column: 1;
    position: sticky;
    top: 0;
    height: auto;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px 20px;
    border-right: none;
    border-bottom: 1px solid var(--border-soft);
  }

  .sidebar-brand {
    margin-bottom: 0;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    flex-basis: 100%;
  }

  .site-nav.open {
    display: block;
  }

  .site-nav-list {
    gap: 2px;
  }

  .sidebar-foot {
    display: none;
  }

  .main-content {
    grid-column: 1;
  }

  .hero-inner,
  .field-notes,
  .signal-inner,
  .engagement-path,
  .service-catalog,
  .faq-panel,
  .start-conversation,
  .site-footer {
    padding-left: 24px;
    padding-right: 24px;
  }

  .hero-title {
    font-size: 40px;
  }

  .section-title {
    font-size: 28px;
  }
}

@media (max-width: 560px) {
  .hero-title {
    font-size: 32px;
  }

  .note-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .path-list {
    grid-template-columns: 1fr;
  }

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

  .catalog-head,
  .catalog-row {
    grid-template-columns: 1.4fr 1fr;
  }

  .catalog-cell:nth-child(3),
  .catalog-cell:nth-child(4) {
    display: none;
  }

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