/* ============================================================
   David Cowell, PE — Portfolio Website
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --navy:       #1b3a5c;
  --navy-dark:  #122843;
  --navy-light: #2a5580;
  --blue:       #3a7cc3;
  --blue-light: #4a9ae6;
  --gold:       #c9a84c;
  --white:      #ffffff;
  --off-white:  #f5f7fa;
  --light-gray: #e8ecf1;
  --gray:       #6b7b8d;
  --dark:       #1a1a2e;
  --text:       #2d3748;
  --text-light: #718096;
  --shadow:     0 4px 20px rgba(0,0,0,.06);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.12);
  --shadow-xl:  0 24px 60px rgba(0,0,0,.16);
  --radius:     16px;
  --transition: .3s ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  height: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Open Sans', Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.contact-page {
  background: var(--navy-dark);
}

::selection {
  background-color: var(--blue);
  color: var(--white);
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--light-gray); }
::-webkit-scrollbar-thumb { background: var(--gray); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--navy); }

h1, h2, h3, h4, h5 {
  font-family: 'Playfair Display', Georgia, serif;
  line-height: 1.3;
}

a {
  color: var(--blue);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--blue-light); }

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

ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section > .container {
  padding-top: 130px;
}

/* ---------- Placeholder Images ---------- */
.placeholder-img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  background: linear-gradient(135deg, var(--light-gray), #d0d7e2);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  position: relative;
}
.placeholder-img::after {
  content: attr(data-label);
  font-size: .85rem;
  color: var(--gray);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 8px 16px;
  border: 2px dashed var(--gray);
  border-radius: 6px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .5px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.btn-primary:hover {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--navy);
}
.btn-full { width: 100%; text-align: center; }

/* ============================================================
   NAVIGATION - Apple-Style Dynamic Island
   ============================================================ */
#navbar {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3000;
  padding: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  max-width: none;
  width: fit-content;
  margin: 0;
  padding: 6px 32px;
  /* Glassmorphism effect */
  background: rgba(27, 58, 92, 0.35);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2), 
              0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.nav-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  color: var(--white);
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
}
.nav-logo:hover { 
  color: var(--white);
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}
.nav-logo span { 
  color: var(--gold);
  transition: all 0.3s ease;
  margin-left: 1px;
}
.nav-logo:hover span {
  color: #ffd966;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  list-style: none;
}
.nav-links li a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 0;
  position: relative;
  letter-spacing: 0.01em;
  transition: all 0.2s ease;
  text-decoration: none;
}
.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: -2px; 
  left: 0;
  width: 0; 
  height: 2px;
  background: linear-gradient(90deg, var(--gold) 0%, #ffd966 100%);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-links li a:hover { 
  color: var(--white);
  text-decoration: none;
}
.nav-links li a:hover::after,
.nav-links li a.active::after { 
  width: 100%; 
}
.nav-links li a.active {
  color: var(--white);
}
.nav-links li a.nav-cta {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%);
  color: var(--white);
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 16px rgba(58, 124, 195, 0.3);
  text-decoration: none;
}
.nav-links li a.nav-cta::after { display: none; }
.nav-links li a.nav-cta:hover { 
  background: linear-gradient(135deg, var(--blue-light) 0%, #5bb0ff 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(58, 124, 195, 0.4);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  cursor: pointer;
  padding: 8px;
  transition: all 0.3s ease;
}
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
}
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
  position: relative;
}
.hamburger::before,
.hamburger::after { content: ''; position: absolute; left: 0; }
.hamburger::before { top: -7px; }
.hamburger::after  { top: 7px; }

/* Mobile menu open state */
.nav-toggle.open .hamburger {
  background: transparent;
}
.nav-toggle.open .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}
.nav-toggle.open .hamburger::after {
  transform: rotate(-45deg);
  top: 0;
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, var(--navy-light) 100%);
  color: var(--white);
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: url('../images/landing_page.JPG') center/cover no-repeat;
  opacity: .3;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
  padding: 0 24px;
}
.hero-content h1 {
  font-size: 3.8rem;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.hero-subtitle {
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--gold);
  margin-bottom: 16px;
}
.hero-tagline {
  font-size: 1.05rem;
  color: rgba(255,255,255,.75);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

#hero-menu-btn {
  display: none;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  cursor: pointer;
  transition: all 0.3s ease;
}
.scroll-indicator:hover {
  transform: translateX(-50%) translateY(-5px);
}
.scroll-arrow {
  width: 28px;
  height: 28px;
  border-right: 3px solid rgba(255, 255, 255, 0.95);
  border-bottom: 3px solid rgba(255, 255, 255, 0.95);
  transform: rotate(45deg);
  animation: arrowBounce 2s infinite;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.5));
}
@keyframes arrowBounce {
  0%, 100% {
    transform: rotate(45deg) translateY(0);
    opacity: 0.7;
  }
  50% {
    transform: rotate(45deg) translateY(10px);
    opacity: 1;
  }
}
    transform: rotate(45deg) translateY(8px);
    opacity: 1;
  }
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  padding: 180px 0 100px;
  flex: 1 0 auto;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
}
.section.section-dark#contact {
  align-items: center;
  justify-content: center;
  padding: 140px 0 80px;
}
.section-alt {
  background: var(--off-white);
}
.section-dark {
  background: var(--navy-dark);
  color: var(--white);
}
.section-title {
  text-align: center;
  font-size: 2.6rem;
  margin-bottom: 16px;
  margin-top: 0;
  color: var(--navy);
  font-weight: 700;
  letter-spacing: -1px;
}
.section-title.light { color: var(--white); }
.section-subtitle {
  text-align: center;
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto 56px;
  font-size: 1.08rem;
  font-weight: 400;
  line-height: 1.6;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 60px;
  align-items: start;
  margin-top: 48px;
}
.about-photo img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  transition: transform var(--transition), box-shadow var(--transition);
}
.about-photo img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}
.about-photo .placeholder-img {
  min-height: 360px;
  border-radius: var(--radius);
}
.about-text .lead {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 16px;
}
.about-text p { margin-bottom: 14px; }

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.stat {
  text-align: center;
  padding: 24px 12px;
  background: var(--off-white);
  border-radius: var(--radius);
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.stat:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.stat-number {
  display: block;
  font-family: 'Playfair Display', serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--blue);
}
.stat-label {
  font-size: .78rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  margin-top: 4px;
  display: block;
}

/* ============================================================
   EXPERTISE (Areas of Expertise on landing page)
   ============================================================ */
.expertise-summary {
  margin-top: 80px;
}

.expertise-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 32px;
}

.expertise-item {
  background: var(--white);
  padding: 28px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.expertise-item:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.expertise-item h4 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 10px;
}
.expertise-item p {
  font-size: .88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ============================================================
   TIMELINE (Experience)
   ============================================================ */
.timeline {
  position: relative;
  max-width: 840px;
  margin: 48px auto 0;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px; top: 0;
  width: 3px;
  height: 100%;
  background: var(--light-gray);
  border-radius: 3px;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px; top: 8px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--blue);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--blue);
}

.timeline-date {
  font-size: .82rem;
  font-weight: 700;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.timeline-content {
  background: var(--white);
  padding: 28px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.timeline-content:hover {
  transform: translateX(6px) scale(1.01);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.timeline-content h3 {
  font-size: 1.3rem;
  color: var(--navy);
  margin-bottom: 4px;
}
.timeline-org {
  color: var(--gray);
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.timeline-content ul {
  padding-left: 20px;
  list-style: disc;
}
.timeline-content ul li {
  margin-bottom: 6px;
  font-size: .92rem;
  color: var(--text);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 10px 24px;
  border: 2px solid var(--light-gray);
  background: var(--white);
  border-radius: 30px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text);
  transition: all var(--transition);
}
.filter-btn:hover {
  background: var(--off-white);
  border-color: var(--blue);
  color: var(--navy);
  transform: translateY(-2px);
}
.filter-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(58, 124, 195, 0.3);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 32px;
}

.project-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.project-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--blue);
}

.project-img {
  height: 220px;
  overflow: hidden;
  background: #f5f5f5;
}
.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}
.project-img .placeholder-img {
  border-radius: 0;
  min-height: 220px;
}

.project-info {
  padding: 24px 28px 28px;
}
.project-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--blue);
  background: rgba(58,124,195,.08);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.project-info h3 {
  font-size: 1.15rem;
  color: var(--navy);
  margin-bottom: 10px;
}
.project-info p {
  font-size: .9rem;
  color: var(--text-light);
  margin-bottom: 12px;
}
.project-meta {
  display: flex;
  gap: 24px;
  font-size: .85rem;
  color: var(--text);
  margin-bottom: 12px;
}
.project-link {
  font-weight: 600;
  font-size: .9rem;
}

.project-placeholder {
  opacity: .55;
}

/* ============================================================
   SUBPAGE CARDS (Project Management Hub)
   ============================================================ */
.subpage-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 40px;
  margin-top: 48px;
}

.subpage-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
  display: block;
}
.subpage-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--blue);
}

.subpage-img {
  height: 280px;
  overflow: hidden;
  background: #f5f5f5;
}
.subpage-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--transition);
}
.subpage-card:hover .subpage-img img {
  transform: scale(1.05);
}

.subpage-info {
  padding: 32px;
}
.subpage-info h3 {
  font-size: 1.4rem;
  color: var(--navy);
  margin-bottom: 12px;
}
.subpage-info p {
  font-size: .95rem;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}
.subpage-link {
  display: inline-block;
  font-weight: 600;
  font-size: .9rem;
  color: var(--blue);
  transition: color var(--transition), transform var(--transition);
}
.subpage-card:hover .subpage-link {
  color: var(--blue-light);
  transform: translateX(4px);
}

/* ============================================================
   SAMPLE WORK PAGE
   ============================================================ */
.sample-work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 48px;
}

.sample-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  text-align: center;
}

.sample-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.sample-item h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  color: var(--navy);
  margin-bottom: 24px;
}

/* Video Item */
.video-item .video-link {
  position: relative;
  display: block;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(0,0,0,.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.video-item .video-link:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
}

.video-thumbnail {
  width: 100%;
  height: auto;
  display: block;
}

.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: transform var(--transition), opacity var(--transition);
  opacity: 0.9;
}

.video-item .video-link:hover .play-overlay {
  transform: translate(-50%, -50%) scale(1.1);
  opacity: 1;
}

/* Document Items */
.document-preview {
  margin: 24px 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--blue);
  color: var(--white);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
  margin-bottom: 16px;
}

.download-btn:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
}

.sample-description {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-top: 12px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .sample-work-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .sample-item {
    padding: 24px;
  }
  
  .play-overlay svg {
    width: 60px;
    height: 60px;
  }
}

/* ============================================================
   WATER / WASTEWATER INTRO
   ============================================================ */
.ww-intro {
  max-width: 950px;
  margin: 0 auto 56px;
  padding: 48px 56px;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(27, 58, 92, 0.08);
  position: relative;
  border: 1px solid rgba(58, 124, 195, 0.1);
}
.ww-intro::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--blue) 0%, var(--blue-light) 100%);
  border-radius: var(--radius) 0 0 var(--radius);
}
.ww-intro .lead {
  font-size: 1.15rem;
  line-height: 1.85;
  color: var(--navy);
  font-weight: 400;
  margin: 0;
  position: relative;
  text-align: center;
}

/* ============================================================
   CLIENTS
   ============================================================ */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 32px;
  margin-top: 24px;
}

.client-card {
  background: var(--white);
  padding: 36px;
  border-radius: var(--radius);
  box-shadow: 0 2px 12px rgba(0,0,0,.04);
  border: 1px solid var(--light-gray);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: visible;
}
.client-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--blue) 0%, var(--blue-light) 100%);
  border-radius: var(--radius) var(--radius) 0 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.client-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(27, 58, 92, 0.12);
  border-color: var(--blue);
}
.client-card:hover::before {
  opacity: 1;
}
.client-card h4 {
  font-size: 1.2rem;
  color: var(--navy);
  margin-bottom: 10px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.client-location {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue-light);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  background: linear-gradient(135deg, rgba(58, 124, 195, 0.1) 0%, rgba(74, 154, 230, 0.08) 100%);
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid rgba(58, 124, 195, 0.15);
}
.client-card p {
  font-size: 0.93rem;
  color: var(--text-light);
  line-height: 1.8;
  margin: 0;
}

/* ============================================================
   SKILLS / EXPERTISE
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

.skill-card {
  background: var(--white);
  padding: 40px 28px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.skill-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.skill-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform var(--transition);
}
.skill-card:hover .skill-icon {
  transform: scale(1.1) rotate(5deg);
}

/* Icon styles */
.icon-gear {
  background: linear-gradient(135deg, #1b3a5c 0%, #2c5f8d 100%);
}
.icon-gear::before {
  content: '⚙';
  font-size: 40px;
  color: white;
}

.icon-water {
  background: linear-gradient(135deg, #2196F3 0%, #1565C0 100%);
}
.icon-water::before {
  content: '💧';
  font-size: 40px;
}

.icon-buildings {
  background: linear-gradient(135deg, #7E57C2 0%, #5E35B1 100%);
}
.icon-buildings::before {
  content: '🏛';
  font-size: 40px;
}

.icon-chart {
  background: linear-gradient(135deg, #26A69A 0%, #00897B 100%);
}
.icon-chart::before {
  content: '📊';
  font-size: 40px;
}

.icon-construction {
  background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
}
.icon-construction::before {
  content: '🔨';
  font-size: 40px;
}

.icon-computer {
  background: linear-gradient(135deg, #42A5F5 0%, #1E88E5 100%);
}
.icon-computer::before {
  content: '💻';
  font-size: 40px;
}

.skill-card h4 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 10px;
}
.skill-card p {
  font-size: .88rem;
  color: var(--text-light);
}

/* ============================================================
   EDUCATION
   ============================================================ */
.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 48px;
}

.edu-heading {
  font-size: 1.3rem;
  color: var(--navy);
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--light-gray);
}

.section-dark .edu-heading {
  color: var(--white);
  border-bottom-color: rgba(255,255,255,.2);
}

.edu-card {
  background: var(--white);
  padding: 28px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.edu-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.edu-card h4 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 4px;
}
.edu-location {
  font-size: .85rem;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 8px;
}
.edu-degree {
  font-size: .92rem;
  color: var(--text);
  margin-bottom: 4px;
}
.edu-honors {
  font-size: .85rem;
  color: var(--gold);
  font-weight: 600;
}

.license-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.license-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--white);
  padding: 22px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.license-card:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.license-state {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
}
.license-year {
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue);
  background: rgba(58,124,195,.08);
  padding: 6px 16px;
  border-radius: 20px;
}

/* ============================================================
   REFERENCES
   ============================================================ */
.references-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.ref-card {
  background: var(--white);
  padding: 36px 28px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--light-gray);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.ref-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.ref-card h4 {
  font-size: 1.15rem;
  color: var(--navy);
  margin-bottom: 4px;
}
.ref-title {
  font-weight: 600;
  color: var(--text);
  font-size: .9rem;
}
.ref-org {
  color: var(--gray);
  font-size: .85rem;
  margin-bottom: 14px;
}
.ref-contact {
  font-size: .88rem;
  margin-bottom: 4px;
}
.ref-contact a {
  color: var(--blue);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 48px;
}

.contact-info-full {
  display: flex;
  justify-content: center;
  gap: 80px;
  margin-top: 48px;
  flex-wrap: wrap;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.contact-item {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
  align-items: flex-start;
}
.contact-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}
.contact-item h4 {
  font-family: 'Open Sans', sans-serif;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,.5);
  margin-bottom: 4px;
}
.contact-item a,
.contact-item p {
  color: var(--white);
  font-size: 1rem;
}
.contact-item a:hover { color: var(--gold); }

.contact-form .form-group {
  margin-bottom: 16px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid rgba(255,255,255,.15);
  border-radius: 6px;
  background: rgba(255,255,255,.06);
  color: var(--white);
  font-size: .95rem;
  font-family: 'Open Sans', sans-serif;
  transition: border-color var(--transition);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255,255,255,.4);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue);
}

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--dark);
  color: rgba(255,255,255,.5);
  text-align: center;
  padding: 20px 0;
  font-size: .85rem;
  margin-top: auto;
  border-top: 1px solid rgba(255,255,255,.05);
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children slightly */
.project-card.animate-in:nth-child(2) { transition-delay: .1s; }
.project-card.animate-in:nth-child(3) { transition-delay: .2s; }
.stat.animate-in:nth-child(2) { transition-delay: .1s; }
.stat.animate-in:nth-child(3) { transition-delay: .2s; }
.stat.animate-in:nth-child(4) { transition-delay: .3s; }

/* Active nav link */
.nav-links li a.active-link { color: var(--gold); }
.nav-links li a.active-link::after { width: 100%; background: var(--gold); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 968px) {
  #navbar {
    top: 16px;
  }
  .nav-container {
    padding: 6px 32px;
    gap: 36px;
  }
  .nav-toggle {
    display: flex;
  }
  #hero-menu-btn {
    display: inline-block;
  }
  .nav-links {
    position: fixed;
    top: 88px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    width: 90vw;
    max-width: 360px;
    height: auto;
    max-height: calc(100vh - 120px);
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    /* Enhanced glassmorphism for mobile menu */
    background: rgba(27, 58, 92, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    opacity: 0;
    visibility: hidden;
  }
  .nav-links.open { 
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  .nav-links li { 
    width: 100%; 
  }
  .nav-links li a {
    display: block;
    padding: 14px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .nav-links li:last-child a {
    border-bottom: none;
  }
  .nav-links li a.nav-cta {
    text-align: center;
    margin-top: 8px;
    padding: 12px 24px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .about-photo { max-width: 300px; margin: 0 auto; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .expertise-list { grid-template-columns: 1fr; }
  .subpage-cards { grid-template-columns: 1fr; }
  .education-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid  { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  #navbar {
    top: 12px;
  }
  .nav-container {
    padding: 6px 24px;
    gap: 20px;
  }
  .nav-logo {
    font-size: 1.2rem;
    padding: 6px 12px;
  }
  .nav-links {
    width: calc(100vw - 32px);
    max-width: none;
  }

  .hero-content h1 { font-size: 2.6rem; }
  .hero-subtitle  { font-size: 1.1rem; }
  .section { padding: 120px 0 80px; min-height: auto; }
  .section > .container { padding-top: 20px; }
  .section-title { font-size: 2rem; }

  /* Larger scroll arrow on mobile */
  .scroll-arrow {
    width: 32px;
    height: 32px;
    border-right: 4px solid rgba(255, 255, 255, 1);
    border-bottom: 4px solid rgba(255, 255, 255, 1);
    filter: drop-shadow(0 3px 12px rgba(0, 0, 0, 0.7));
  }

  .projects-grid,
  .clients-grid,
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .timeline { padding-left: 28px; }
  .timeline-item::before { left: -22px; width: 10px; height: 10px; }
  .timeline::before { left: 0; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 2rem; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-buttons { flex-direction: column; }
  .btn { padding: 12px 24px; }
}