:root {
  /* Backgrounds */
  --bg-primary:     #0a0d12;   /* Main dark bg */
  --bg-secondary:   #0f1318;   /* Card bg */
  --bg-tertiary:    #141920;   /* Section alt bg */
  --bg-card:        #131920;   /* Card surface */
  --bg-card-hover:  #1a2230;

  /* Accent */
  --green:          #39e07b;   /* Primary CTA green */
  --green-hover:    #2bc466;
  --green-muted:    rgba(57, 224, 123, 0.12);

  /* Text */
  --text-primary:   #ffffff;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;

  /* Borders */
  --border:         rgba(255, 255, 255, 0.08);
  --border-green:   rgba(57, 224, 123, 0.3);

  /* Typography */
  --font-main: 'Inter', sans-serif;

  /* Spacing scale */
  --space-xs:   8px;
  --space-sm:  16px;
  --space-md:  24px;
  --space-lg:  48px;
  --space-xl:  80px;
  --space-2xl: 120px;

  /* Radius */
  --radius-sm:  8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 100px;

  /* Container */
  --container: 1200px;
}

/* ── BASE RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; width: 100%; }
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

section {
  padding: var(--space-xl) 0;
}

/* ── TYPOGRAPHY CLASSES ── */
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: var(--space-sm);
  display: block;
}
h1 { font-size: clamp(36px, 5vw, 64px); font-weight: 700; line-height: 1.1; }
h2 { font-size: clamp(28px, 4vw, 48px); font-weight: 700; line-height: 1.2; }
h3 { font-size: clamp(18px, 2.5vw, 24px); font-weight: 600; }
h4 { font-size: 18px; font-weight: 600; }
p  { color: var(--text-secondary); line-height: 1.7; }

.section-header {
  margin-bottom: var(--space-lg);
}
.section-header.centered {
  text-align: center;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ── BUTTON CLASSES ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--green);
  color: #000;
}
.btn-primary:hover { background: var(--green-hover); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--green);
  color: var(--green);
}

.btn-sm { padding: 10px 20px; font-size: 13px; }
.btn-lg { padding: 18px 36px; font-size: 17px; }

/* ── CARD CLASSES ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.card:hover {
  border-color: var(--border-green);
  background: var(--bg-card-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--green-muted);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  color: var(--green);
  font-size: 22px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  background: var(--green-muted);
  color: var(--green);
  border: 1px solid var(--border-green);
}

/* ── GRID UTILITIES ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-md); }

.flex       { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col   { display: flex; flex-direction: column; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

/* RESPONSIVE BREAKDOWNS */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }
  section { padding: var(--space-lg) 0; }
}

/* ── HEADER / NAVBAR ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 13, 18, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.navbar { width: 100%; }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-md);
}

.nav-logo img {
  height: 44px;
  width: auto;
}

/* Desktop links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

/* Active page highlight */
.nav-link.current {
  color: var(--green);
  font-weight: 600;
}

/* Dropdown */
.has-dropdown { position: relative; }

.has-dropdown:hover .dropdown { 
  opacity: 1; 
  visibility: visible; 
  transform: translateY(0); 
}

.dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 100;
}

.dropdown li a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}
.dropdown li a:hover {
  color: var(--green);
  background: var(--green-muted);
}

/* Chevron */
.chevron { font-size: 10px; opacity: 0.6; }

/* CTA in nav */
.nav-cta { flex-shrink: 0; font-size: 14px; padding: 11px 22px; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.mobile-menu {
  display: none;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: var(--space-sm) 0;
}
.mobile-menu.open { display: block; }

.mobile-links {
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-md);
}
.mobile-links li a {
  display: block;
  padding: 14px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.mobile-links li:last-child a { border-bottom: none; }
.mobile-links li a:hover { color: var(--green); }

/* RESPONSIVE NAVBAR */
@media (max-width: 1024px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
}

/* ── FOOTER CSS ── */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding-top: var(--space-xl);
  margin-top: var(--space-xl);
}

.footer-top { align-items: start; }

.footer-heading {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links li { font-size: 14px; color: var(--text-secondary); }
.footer-links li a { color: var(--text-secondary); transition: color 0.2s; }
.footer-links li a:hover { color: var(--green); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: var(--space-md) 0;
  margin-top: var(--space-lg);
  text-align: center;
}
.footer-bottom p { font-size: 13px; color: var(--text-muted); }

@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-top { grid-template-columns: 1fr; }
}

/* ── PAGE HERO CSS ── */
.page-hero {
  padding: var(--space-xl) 0;
  background: 
    radial-gradient(ellipse 60% 60% at 50% -20%, 
      rgba(57, 224, 123, 0.08) 0%, transparent 70%),
    var(--bg-primary);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.page-hero p {
  max-width: 600px;
  margin: 16px auto 0;
  font-size: 18px;
}

/* ── PORTFOLIO STYLES ── */
.filter-btn {
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}
.filter-btn:hover,
.filter-btn.active {
  background: var(--green);
  border-color: var(--green);
  color: #000;
  font-weight: 600;
}

.portfolio-card { padding: 0; overflow: hidden; }

.portfolio-thumb { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.portfolio-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.portfolio-card:hover .portfolio-thumb img { transform: scale(1.04); }

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 13, 18, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.portfolio-card:hover .portfolio-overlay { opacity: 1; }

.portfolio-info { padding: var(--space-md); }
.portfolio-info h3 { margin: 10px 0 8px; }

/* Filter JS behavior */
.portfolio-card.hidden { display: none; }