:root {
  /* ---- Light theme (Option 2: modern blue) ---- */
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #475569;
  --heading: #0f172a;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-contrast: #ffffff;
  --line: #e2e8f0;
  --nav-bg: rgba(255,255,255,.92);
  --nav-border: #e2e8f0;
  --kicker: #93c5fd;
  --feature-bg: #0f172a;
  --feature-text: #cbd5e1;
  --feature-heading: #ffffff;
  --chip-bg: rgba(255,255,255,.06);
  --chip-border: rgba(255,255,255,.16);
  --chip-text: #e8edf4;
  --cta-bg: #0f172a;
  --cta-text: #cbd5e1;
  --cta-heading: #ffffff;
  --footer-bg: #020617;
  --footer-text: #8b98a8;
  --footer-link: #b9c4d2;
  --shadow: 0 10px 40px rgba(15,23,42,.12);
}
[data-theme="dark"] {
  /* ---- Dark theme (Option 3: premium gold on dark navy) ---- */
  --bg: #080d1a;
  --bg-alt: #0e1526;
  --card: #121a2e;
  --text: #dfe5ee;
  --muted: #93a1b5;
  --heading: #ffffff;
  --accent: #c9a227;
  --accent-hover: #e0bd4e;
  --accent-contrast: #0a0f1e;
  --line: rgba(255,255,255,.09);
  --nav-bg: rgba(8,13,26,.9);
  --nav-border: rgba(255,255,255,.09);
  --kicker: #e0bd4e;
  --feature-bg: #0a0f1e;
  --feature-text: #c7d0de;
  --feature-heading: #ffffff;
  --chip-bg: #121a2e;
  --chip-border: rgba(201,162,39,.28);
  --chip-text: #e8edf4;
  --cta-bg: #0a0f1e;
  --cta-text: #c7d0de;
  --cta-heading: #ffffff;
  --footer-bg: #050910;
  --footer-text: #7e8aa0;
  --footer-link: #b9c4d2;
  --shadow: 0 12px 44px rgba(0,0,0,.5);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background .25s, color .25s;
}
h1, h2, h3, h4 { font-family: 'Playfair Display', Georgia, serif; color: var(--heading); font-weight: 600; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 40px;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--nav-border);
  transition: background .25s, box-shadow .2s;
}
.nav.scrolled { box-shadow: 0 2px 18px rgba(0,0,0,.12); }
.nav .brand { display: flex; align-items: center; text-decoration: none; }
.nav .brand img { height: 100px; width: auto; border-radius: 4px; }
.nav .brand .logo-dark { display: none; }
[data-theme="dark"] .nav .brand .logo-light { display: none; }
[data-theme="dark"] .nav .brand .logo-dark { display: block; }
.nav .links { display: flex; gap: 28px; align-items: center; }
.nav .links a {
  text-decoration: none; color: var(--heading); font-size: .95rem;
  font-weight: 500; transition: color .15s;
}
.nav .links a:hover { color: var(--accent); }
.nav .links a.active { color: var(--accent); }

/* Theme toggle */
.theme-toggle {
  background: transparent; border: 1px solid var(--line); border-radius: 8px;
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--heading); margin-left: 4px; transition: background .15s;
}
.theme-toggle:hover { background: var(--bg-alt); }
.theme-toggle svg { width: 19px; height: 19px; }
.icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }

/* ---------- Hero (home) ---------- */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  background: linear-gradient(120deg, rgba(6,10,20,.88) 0%, rgba(10,18,34,.72) 55%, rgba(15,23,42,.5) 100%),
              url('assets/hero-skyline.png') center/cover no-repeat;
  padding: 150px 40px 90px;
}
.hero .inner { max-width: 780px; }
.hero .kicker { display: inline-block; color: var(--kicker); font-size: .82rem; letter-spacing: .24em; text-transform: uppercase; margin-bottom: 22px; font-weight: 600; }
.hero h1 { color: #fff; font-size: clamp(2.2rem, 5vw, 3.9rem); line-height: 1.1; margin-bottom: 22px; }
.hero p.sub { color: #cbd5e1; font-size: 1.2rem; font-weight: 300; max-width: 580px; margin-bottom: 36px; }

.page-hero {
  position: relative; padding: 175px 40px 90px; text-align: center;
  background: linear-gradient(120deg, rgba(6,10,20,.9) 0%, rgba(10,18,34,.75) 55%, rgba(15,23,42,.55) 100%), var(--hero-img) center/cover no-repeat;
}
.page-hero .kicker { color: var(--kicker); font-size: .82rem; letter-spacing: .24em; text-transform: uppercase; margin-bottom: 16px; display: inline-block; font-weight: 600; }
.page-hero h1 { color: #fff; font-size: clamp(2rem, 4.5vw, 3.2rem); }
.page-hero p.sub { color: #cbd5e1; font-size: 1.1rem; margin-top: 16px; max-width: 680px; margin-left: auto; margin-right: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; background: var(--accent); color: var(--accent-contrast);
  text-decoration: none; font-weight: 600; letter-spacing: .02em;
  padding: 15px 34px; border-radius: 6px; transition: background .15s, transform .15s;
}
.btn:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-navy { background: var(--heading); color: var(--bg); }
.btn-navy:hover { background: var(--accent); color: var(--accent-contrast); }

/* ---------- Sections ---------- */
section { padding: 92px 40px; transition: background .25s; }
.section-alt { background: var(--bg-alt); }
.container { max-width: 1140px; margin: 0 auto; }
.eyebrow { color: var(--accent); font-size: .8rem; letter-spacing: .24em; text-transform: uppercase; margin-bottom: 12px; font-weight: 600; }
section h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); margin-bottom: 20px; }
.section-intro { max-width: 720px; margin-bottom: 44px; color: var(--muted); }

/* About */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.about-grid .bio p { margin-bottom: 18px; }
.about-grid .bio p.lead { font-size: 1.15rem; color: var(--heading); font-weight: 500; }
.about-grid img { width: 100%; border-radius: 10px; box-shadow: var(--shadow); }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.service-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 34px 30px; transition: transform .18s, box-shadow .18s, background .25s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.service-card .num { font-family: 'Playfair Display', serif; color: var(--accent); font-size: 2rem; line-height: 1; margin-bottom: 16px; }
.service-card h3 { font-size: 1.25rem; margin-bottom: 12px; }
.service-card p { color: var(--muted); font-size: .95rem; }

/* Sectors */
.sectors { display: flex; flex-wrap: wrap; gap: 14px; }
.sector-tag {
  background: var(--card); border: 1px solid var(--line); border-radius: 30px;
  padding: 12px 26px; font-size: 1rem; font-weight: 500; color: var(--heading); transition: background .25s;
}
.sector-tag::before { content: "— "; color: var(--accent); }

/* Regulatory (feature band) */
.regulatory { background: var(--feature-bg); color: var(--feature-text); }
.regulatory h2 { color: var(--feature-heading); }
.regulatory .eyebrow { color: var(--kicker); }
.regulatory p.lead { color: var(--feature-text); max-width: 800px; margin-bottom: 28px; }
.chips { display: flex; flex-wrap: wrap; gap: 12px; }
.chip {
  background: var(--chip-bg); border: 1px solid var(--chip-border);
  border-radius: 6px; padding: 12px 20px; font-size: .94rem; color: var(--chip-text);
}

/* Values */
.value-props { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.value-prop { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 34px 30px; transition: background .25s; }
.value-prop h4 { font-size: 1.15rem; margin-bottom: 10px; }
.value-prop p { color: var(--muted); font-size: .95rem; }

/* Projects */
.projects-list { display: flex; flex-direction: column; gap: 34px; }
.project-row {
  display: grid; grid-template-columns: 1fr 1fr;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,.05); transition: transform .18s, box-shadow .18s, background .25s;
}
.project-row:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.project-row .img img { width: 100%; height: 100%; object-fit: cover; display: block; min-height: 340px; }
.project-row .body { padding: 44px; display: flex; flex-direction: column; justify-content: center; }
.project-row .tag { color: var(--accent); font-size: .76rem; letter-spacing: .2em; text-transform: uppercase; font-weight: 600; margin-bottom: 12px; }
.project-row h3 { font-size: 1.5rem; margin-bottom: 14px; }
.project-row p { color: var(--muted); font-size: .98rem; margin-bottom: 26px; }
.project-row .btn { align-self: flex-start; }

/* CTA banner */
.cta-banner { background: var(--cta-bg); color: var(--cta-text); text-align: center; }
.cta-banner h2 { color: var(--cta-heading); }
.cta-banner p { max-width: 620px; margin: 0 auto 30px; }

/* Footer */
footer { background: var(--footer-bg); color: var(--footer-text); padding: 40px; text-align: center; font-size: .86rem; transition: background .25s; }
footer .nav-links { margin-top: 14px; display: flex; gap: 26px; justify-content: center; }
footer .nav-links a { color: var(--footer-link); text-decoration: none; }
footer .nav-links a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .nav { padding: 12px 20px; }
  .nav .links { gap: 18px; }
  .nav .brand img { height: 60px; }
  section { padding: 60px 20px; }
  .hero { padding: 130px 20px 60px; }
  .page-hero { padding: 140px 20px 60px; }
  .about-grid, .services-grid, .value-props { grid-template-columns: 1fr; }
  .project-row { grid-template-columns: 1fr; }
}