:root {
  --c-primary: #1b3a5b;
  --c-primary-dark: #14304a;
  --c-accent: #2a7a9b;
  --c-accent-soft: #e6f0f6;
  --c-text: #0f172a;
  --c-muted: #5b6674;
  --c-border: #dde3ec;
  --c-bg: #ffffff;
  --c-bg-soft: #f3f6fa;
  --c-warn: #c0392b;
  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --wrap: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 96px;
  --font-sans: 'Inter', 'Segoe UI', Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--c-accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--c-primary); }
a:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; border-radius: 2px; }

h1, h2, h3, h4 {
  color: var(--c-primary);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 2vw + 1rem, 2.25rem); }
h3 { font-size: clamp(1.2rem, 1vw + 0.9rem, 1.5rem); }
p  { margin: 0 0 var(--space-sm); color: var(--c-text); }
p.lead { font-size: 1.15rem; color: var(--c-muted); max-width: 62ch; }

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

section {
  padding: var(--space-xl) 0;
  scroll-margin-top: 80px;
}
section.soft { background: var(--c-bg-soft); }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--c-accent);
  margin-bottom: var(--space-xs);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--c-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid var(--c-primary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, border-color 0.15s;
  text-decoration: none;
}
.btn:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); color: #fff; transform: translateY(-1px); }
.btn:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; }
.btn.ghost { background: transparent; color: var(--c-primary); }
.btn.ghost:hover { background: var(--c-primary); color: #fff; }
.btn.small { padding: 8px 16px; font-size: 0.85rem; }

/* ---------- HEADER ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(6px);
  border-bottom: 1px solid var(--c-border);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 44px; width: auto; }
.brand-text {
  display: flex; flex-direction: column; line-height: 1.05;
}
.brand-text strong { color: var(--c-primary); font-weight: 800; font-size: 0.95rem; letter-spacing: 0.02em; }
.brand-text span { color: var(--c-muted); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; }

.nav {
  display: flex; gap: 4px; align-items: center;
}
.nav a {
  color: var(--c-text); font-weight: 500; font-size: 0.94rem;
  padding: 10px 14px; border-radius: 4px;
}
.nav a:hover { color: var(--c-primary); background: var(--c-bg-soft); }
.nav a.btn { color: #fff; margin-left: 8px; }
.nav a.btn:hover { color: #fff; background: var(--c-primary-dark); }

.nav-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  padding: 6px; width: 44px; height: 44px;
  color: var(--c-primary);
}
.nav-toggle svg { width: 28px; height: 28px; }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  background: url('../images/hero-pattern.svg') center/cover no-repeat,
              linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  color: #fff;
  padding: clamp(72px, 10vw, 128px) 0;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,48,74,0.25), rgba(20,48,74,0.65));
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }
.hero h1 { color: #fff; max-width: 22ch; }
.hero .lead { color: rgba(255,255,255,0.88); max-width: 58ch; font-size: 1.2rem; }
.hero .hero-cta { margin-top: var(--space-md); display: flex; gap: 12px; flex-wrap: wrap; }
.hero .btn.ghost { color: #fff; border-color: rgba(255,255,255,0.6); background: transparent; }
.hero .btn.ghost:hover { background: #fff; color: var(--c-primary); border-color: #fff; }

.hero-meta {
  display: flex; gap: var(--space-md); margin-top: var(--space-lg);
  flex-wrap: wrap; font-size: 0.9rem; color: rgba(255,255,255,0.8);
  border-top: 1px solid rgba(255,255,255,0.2);
  padding-top: var(--space-md);
}
.hero-meta div strong { display: block; color: #fff; font-size: 1rem; margin-bottom: 2px; }

/* ---------- INTRO ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-lg);
  align-items: center;
}
.intro-points { list-style: none; padding: 0; margin: var(--space-md) 0 0; display: grid; gap: 14px; }
.intro-points li {
  padding: 14px 16px 14px 44px;
  background: var(--c-bg-soft);
  border-left: 3px solid var(--c-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  position: relative;
  font-size: 0.98rem;
}
.intro-points li::before {
  content: ''; position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(42,122,155,0.18);
}

/* ---------- CHAPTERS / SUBTOPICS ---------- */
.section-head { text-align: left; margin-bottom: var(--space-lg); max-width: 70ch; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }

.chapter {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: var(--space-md);
}
.chapter-body {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-md);
  padding: var(--space-md);
  align-items: center;
}
.chapter-body .copy h3 { margin-top: 0; }
.chapter-body .copy .tag {
  display: inline-block;
  background: var(--c-accent-soft);
  color: var(--c-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
}
.chapter-body .illu {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 10px;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.chapter[aria-expanded="true"] .illu { transform: scale(1.01); box-shadow: var(--shadow-md); }

.chapter-actions {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: var(--space-sm);
}

.chapter-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease;
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-border);
}
.chapter[aria-expanded="true"] .chapter-details {
  max-height: 1400px;
}
.chapter-details-inner {
  padding: var(--space-md);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-md);
  align-items: start;
}
.chapter-details ul { padding-left: 22px; margin: 0 0 var(--space-sm); }
.chapter-details li { margin-bottom: 6px; color: var(--c-text); }

.toggle-btn {
  background: none;
  border: 1px solid var(--c-border);
  color: var(--c-primary);
  padding: 10px 18px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 0.15s, border-color 0.15s;
  font-family: inherit;
  font-size: 0.95rem;
}
.toggle-btn:hover { background: var(--c-accent-soft); border-color: var(--c-accent); }
.toggle-btn .chev { transition: transform 0.3s ease; }
.chapter[aria-expanded="true"] .toggle-btn .chev { transform: rotate(180deg); }

/* ---------- EMS ---------- */
.ems-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}
.ems-features {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  margin-top: var(--space-md);
}
.ems-feature {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
.ems-feature strong { color: var(--c-primary); display: block; margin-bottom: 4px; }
.ems-feature span { font-size: 0.9rem; color: var(--c-muted); }

/* ---------- PERMITS ---------- */
.permit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.permit {
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.permit .code {
  display: inline-block;
  font-family: 'Courier New', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  background: var(--c-primary);
  color: #fff;
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.permit h4 { margin: 0 0 4px; font-size: 1rem; color: var(--c-primary); }
.permit span { font-size: 0.88rem; color: var(--c-muted); }

/* ---------- REFERENCES COUNTERS ---------- */
.refs {
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  color: #fff;
}
.refs h2 { color: #fff; }
.refs .lead { color: rgba(255,255,255,0.85); }
.counter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.counter {
  text-align: left;
  padding: 28px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  transition: background 0.2s;
}
.counter:hover { background: rgba(255,255,255,0.1); }
.counter .num {
  font-size: clamp(2rem, 3vw + 1rem, 3.2rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.counter .unit {
  font-size: 1rem; font-weight: 500; color: rgba(255,255,255,0.7);
  margin-left: 4px;
}
.counter .label {
  margin-top: 10px; font-size: 0.92rem; color: rgba(255,255,255,0.82);
  max-width: 28ch;
}

.live-counter {
  margin-top: var(--space-lg);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  max-width: 520px;
  flex-wrap: wrap;
}
.live-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 0 rgba(74,222,128,0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(74,222,128,0.6); }
  70% { box-shadow: 0 0 0 10px rgba(74,222,128,0); }
  100% { box-shadow: 0 0 0 0 rgba(74,222,128,0); }
}
.live-counter .lc-text { font-size: 0.95rem; color: rgba(255,255,255,0.9); }
.live-counter .lc-num {
  font-size: 1.5rem; font-weight: 800; color: #fff;
  font-variant-numeric: tabular-nums;
}

/* ---------- INTEREST FORM ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: var(--space-lg);
}
.contact-info h3 { margin-top: 0; }
.contact-info dl { margin: var(--space-md) 0 0; display: grid; gap: 14px; }
.contact-info dt {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--c-accent);
}
.contact-info dd { margin: 2px 0 0; font-size: 1.02rem; color: var(--c-text); font-weight: 500; }
.contact-info a { color: var(--c-primary); font-weight: 600; }
.contact-info a:hover { color: var(--c-accent); }

.form {
  background: #fff;
  padding: var(--space-md);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form label {
  display: block; margin-bottom: 14px;
  font-size: 0.88rem; font-weight: 600; color: var(--c-primary);
}
.form label .req { color: var(--c-warn); }
.form input, .form select, .form textarea {
  display: block; width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.98rem;
  background: #fff;
  color: var(--c-text);
  transition: border-color 0.15s, box-shadow 0.15s;
  margin-top: 4px;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(42,122,155,0.18);
}
.form textarea { min-height: 120px; resize: vertical; }
.form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .consent {
  font-size: 0.85rem; font-weight: 400; color: var(--c-muted); line-height: 1.5;
  display: flex; gap: 10px; align-items: flex-start;
}
.form .consent input { width: auto; margin-top: 4px; }
.form button[type="submit"] { width: 100%; justify-content: center; margin-top: 8px; }
.form-status {
  display: none; margin-top: 12px; padding: 12px 14px; border-radius: var(--radius);
  font-size: 0.92rem; font-weight: 500;
}
.form-status.ok { display: block; background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.form-status.err { display: block; background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--c-primary-dark);
  color: rgba(255,255,255,0.75);
  padding: var(--space-lg) 0 var(--space-md);
  font-size: 0.92rem;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-md);
}
.site-footer h4 {
  color: #fff; font-size: 0.78rem; letter-spacing: 0.12em;
  text-transform: uppercase; margin-bottom: 14px;
}
.site-footer a { color: rgba(255,255,255,0.8); }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.copyright {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
}

/* ---------- REVEAL ANIMATION ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .live-dot { animation: none; }
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .nav { display: none; }
  .nav.open {
    display: flex; flex-direction: column; align-items: stretch;
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--c-border);
    padding: 12px var(--gutter) 20px; gap: 0;
    box-shadow: var(--shadow-md);
  }
  .nav.open a { padding: 12px 0; border-bottom: 1px solid var(--c-border); }
  .nav.open a:last-of-type { border-bottom: none; }
  .nav.open .btn { margin-left: 0; margin-top: 12px; text-align: center; justify-content: center; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }

  .intro-grid, .chapter-body, .chapter-details-inner, .ems-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .ems-features { grid-template-columns: 1fr; }
  .form .row { grid-template-columns: 1fr; }
  .site-footer .wrap { grid-template-columns: 1fr; }
  section { padding: var(--space-lg) 0; }
}
@media (max-width: 520px) {
  .brand-text span { display: none; }
  .hero-meta { gap: var(--space-sm); }
  .hero-meta div { flex: 1 1 40%; }
}