/* ============================================================
   POLARIS BRIDGE ENGINEERING LLC — Shared Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* --- Variables --- */
:root {
  --primary:       #1558a8;
  --primary-dark:  #0d3d7a;
  --secondary:     #2472c8;
  --accent:        #e8a820;
  --accent-light:  #f5c84a;
  --light:         #f0f5fc;
  --white:         #ffffff;
  --text:          #2a2a2a;
  --text-light:    #555555;
  --border:        #ccd9ec;
  --shadow:        0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg:     0 12px 48px rgba(0,0,0,0.14);
  --radius:        4px;
  --radius-lg:     10px;
  --transition:    all 0.3s ease;
  --nav-height:    72px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: 'Crimson Pro', serif;
  font-weight: 600;
  line-height: 1.25;
  color: var(--primary);
}
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
p  { color: var(--text-light); line-height: 1.8; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--primary); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-light); border-color: var(--accent-light); transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.6); }
.btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: var(--white); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-accent-outline { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-accent-outline:hover { background: var(--accent); color: var(--primary); }

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--primary);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.nav-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo img { height: 44px; width: auto; }
.nav-logo span {
  font-family: 'Crimson Pro', serif;
  font-size: 1.1rem;
  color: var(--white);
  font-weight: 600;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-menu li a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: var(--transition);
}
.nav-menu li a:hover,
.nav-menu li a.active { color: var(--white); background: rgba(255,255,255,0.1); }
.nav-menu li a.nav-cta {
  background: var(--accent);
  color: var(--primary);
  font-weight: 600;
  padding: 8px 18px;
}
.nav-menu li a.nav-cta:hover { background: var(--accent-light); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* --- Page offset for fixed nav --- */
.page-offset { padding-top: var(--nav-height); }

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: var(--primary);
  padding: 72px 32px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('bridge_design.jpg') center/cover no-repeat;
  opacity: 0.08;
}
.page-hero-inner { position: relative; max-width: 800px; margin: 0 auto; }
.page-hero-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.page-hero h1 { color: var(--white); margin-bottom: 16px; }
.page-hero p { color: rgba(255,255,255,0.72); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* --- Sections --- */
.section { padding: 88px 32px; }
.section-alt { background: var(--light); }
.section-dark { background: var(--primary); }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.section-header h2 { margin-bottom: 16px; }
.section-header p { max-width: 600px; margin: 0 auto; font-size: 1.05rem; }

/* --- Grids --- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 28px; }

/* --- Cards --- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.card-body { padding: 28px; }
.card-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
}
.card h3 { margin-bottom: 10px; font-size: 1.15rem; }
.card p { font-size: 0.92rem; }
.card-link {
  display: inline-block;
  margin-top: 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
.card-link:hover { text-decoration: underline; }

/* --- Project Cards (with overlay) --- */
.project-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  display: block;
}
.project-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-card:hover img { transform: scale(1.06); }
.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,25,34,0.92) 0%, rgba(15,25,34,0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  transition: var(--transition);
}
.project-card:hover .project-overlay { background: linear-gradient(to top, rgba(15,25,34,0.96) 0%, rgba(15,25,34,0.5) 60%, rgba(15,25,34,0.1) 100%); }
.project-cat {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.project-overlay h3 { color: var(--white); font-size: 1.05rem; margin-bottom: 6px; }
.project-overlay p {
  color: rgba(255,255,255,0.75);
  font-size: 0.86rem;
  line-height: 1.5;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.project-card:hover .project-overlay p { max-height: 80px; }

/* --- Stats Bar --- */
.stats-bar {
  background: var(--primary-dark);
  padding: 48px 32px;
  display: flex;
  justify-content: center;
  gap: 0;
}
.stats-bar-inner {
  max-width: 900px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 16px 24px;
  border-right: 1px solid rgba(255,255,255,0.12);
}
.stat-item:last-child { border-right: none; }
.stat-number {
  display: block;
  font-family: 'Crimson Pro', serif;
  font-size: 2.8rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
}

/* --- Service Section (alternating) --- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 32px;
}
.service-block.reverse { direction: rtl; }
.service-block.reverse > * { direction: ltr; }
.service-block-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.service-block-content .section-label { text-align: left; }
.service-block-content h2 { margin-bottom: 20px; }
.service-block-content p { margin-bottom: 24px; }
.service-list { margin: 20px 0 28px; }
.service-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-light);
}
.service-list li::before {
  content: '→';
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 2px;
}

/* --- About / Bio --- */
.bio-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 64px;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}
.bio-sidebar {}
.bio-photo-placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background: var(--primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.bio-photo-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.bio-credentials {}
.credential-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.credential-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.credential-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--secondary);
  display: block;
  margin-bottom: 3px;
}
.credential-value { font-size: 0.9rem; color: var(--text); font-weight: 500; }
.credential-sub { font-size: 0.82rem; color: var(--text-light); }

/* --- Timeline --- */
.timeline { max-width: 800px; margin: 0 auto; }
.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.timeline-item:last-child { border-bottom: none; }
.timeline-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
  padding-top: 4px;
}
.timeline-content h4 { font-size: 1rem; margin-bottom: 4px; color: var(--primary); }
.timeline-content .co { font-size: 0.9rem; color: var(--secondary); font-weight: 500; margin-bottom: 4px; }
.timeline-content p { font-size: 0.88rem; }

/* --- Filter Bar (Projects) --- */
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 48px;
}
.filter-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 9px 20px;
  border: 1.5px solid var(--border);
  background: var(--white);
  border-radius: 100px;
  cursor: pointer;
  color: var(--text-light);
  transition: var(--transition);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* --- Contact Form --- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  max-width: 1100px;
  margin: 0 auto;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--white);
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200,155,63,0.12); }
.form-group textarea { resize: vertical; min-height: 140px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* --- Contact Sidebar --- */
.contact-sidebar {}
.contact-info-block {
  background: #2472c8;
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 24px;
  color: var(--white);
}
.contact-info-block h3 { color: var(--white); margin-bottom: 24px; font-size: 1.1rem; }
.contact-info-block h4 { color: var(--accent) !important; }
.contact-info-block p { color: rgba(255,255,255,0.85) !important; }
.contact-info-block .contact-info-item { color: rgba(255,255,255,0.9); }
.contact-info-block .contact-info-item a { color: var(--white) !important; font-weight: 600; }
.contact-info-block .contact-info-item a:hover { color: var(--accent) !important; }
.contact-info-block .state-badge.primary { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.4); color: var(--white); }
.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
}
.contact-info-item:last-child { margin-bottom: 0; }
.ci-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }
.ci-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  display: block;
  margin-bottom: 3px;
}
.ci-value { color: var(--white); font-size: 0.9rem; }
.ci-value a { color: var(--accent); }
.service-area-box {
  background: var(--light);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
}
.service-area-box h4 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.area-list { display: flex; flex-wrap: wrap; gap: 8px; }
.area-tag {
  background: var(--primary);
  color: var(--white);
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-family: 'IBM Plex Mono', monospace;
}

/* --- Expertise Cards --- */
.expertise-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
}
.expertise-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-3px); }
.expertise-icon { font-size: 2rem; margin-bottom: 16px; display: block; }
.expertise-card h3 { margin-bottom: 10px; font-size: 1.1rem; }

/* --- CTA Banner --- */
.cta-banner {
  background: var(--accent);
  padding: 72px 32px;
  text-align: center;
}
.cta-banner h2 { color: var(--primary); margin-bottom: 12px; }
.cta-banner p { color: rgba(26,35,50,0.8); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
.cta-banner .btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.cta-banner .btn-primary:hover { background: var(--primary-dark); }

/* --- Footer --- */
.footer {
  background: var(--primary-dark);
  padding: 56px 32px 28px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 28px;
}
.footer-logo img { height: 40px; margin-bottom: 16px; }
.footer-desc { color: rgba(255,255,255,0.55); font-size: 0.88rem; line-height: 1.7; margin-bottom: 20px; max-width: 280px; }
.footer-col h4 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--white); }
.footer-contact-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: rgba(255,255,255,0.6);
  font-size: 0.86rem;
  margin-bottom: 10px;
}
.footer-contact-item a { color: rgba(255,255,255,0.6); }
.footer-contact-item a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright {
  color: rgba(255,255,255,0.4);
  font-size: 0.82rem;
  line-height: 1.6;
}
.footer-certs {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-top: 1px solid rgba(255,255,255,0.12); }
  .service-block { grid-template-columns: 1fr; gap: 32px; }
  .service-block.reverse { direction: ltr; }
  .bio-grid { grid-template-columns: 1fr; }
  .bio-sidebar { max-width: 400px; }
  .bio-photo-placeholder { aspect-ratio: 1; }
  .contact-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--primary-dark);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
  }
  .nav-menu.open { display: flex; }
  .nav-menu li a { padding: 12px 16px; display: block; }
  .nav-toggle { display: block; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 56px 20px; }
  .stats-bar { padding: 32px 20px; }
  .stats-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .timeline-item { grid-template-columns: 1fr; gap: 8px; }
  .service-block { padding: 48px 20px; }
  .page-hero { padding: 56px 20px 48px; }
}