/* GridSpan — High-End Engineering Consultancy */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Playfair+Display:wght@500;600;700&display=swap');

:root {
  --navy: #0c1a2e;
  --navy-mid: #142640;
  --navy-light: #1c3454;
  --slate: #334155;
  --steel: #64748b;
  --silver: #94a3b8;
  --mist: #e2e8f0;
  --cloud: #f1f5f9;
  --white: #ffffff;
  --accent: #2596be;
  --accent-deep: #1a7a9e;
  --accent-glow: #38bdf8;

  --font-body: 'DM Sans', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  --max-w: 1140px;
  --section-pad: 100px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--slate);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }

/* ── NAV ─────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(12, 26, 46, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-family: var(--font-body);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.5px;
}
.logo em { font-style: normal; color: var(--accent-glow); }
.nav-menu { display: flex; align-items: center; gap: 36px; list-style: none; }
.nav-menu a {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: color 0.2s;
}
.nav-menu a:hover { color: var(--white); }
.nav-menu .btn-nav {
  background: var(--accent);
  color: var(--white) !important;
  padding: 10px 24px;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s;
}
.nav-menu .btn-nav:hover { background: var(--accent-deep); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  margin: 5px 0;
  transition: 0.3s;
}

/* ── HERO ─────────────────────────────── */
.hero {
  background: var(--navy);
  color: var(--white);
  padding: 180px 28px 120px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 600px at 70% 40%, rgba(37, 150, 190, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 600px 400px at 20% 80%, rgba(56, 189, 248, 0.05) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37,150,190,0.3), transparent);
}
.hero .container { position: relative; z-index: 1; }
.hero-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.5px;
  max-width: 720px;
  margin-bottom: 24px;
}
.hero h1 span { color: var(--accent-glow); }
.hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.6);
  max-width: 580px;
  line-height: 1.8;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--white);
  padding: 15px 32px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-1px); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.8);
  padding: 15px 32px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid rgba(255,255,255,0.2);
  transition: border-color 0.2s, color 0.2s;
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.5); color: var(--white); }

/* ── SECTIONS ────────────────────────── */
.section { padding: var(--section-pad) 28px; }
.section--gray { background: var(--cloud); }
.section--white { background: var(--white); }
.section--dark { background: var(--navy); color: var(--white); }

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section--dark .section-eyebrow { color: var(--accent-glow); }

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 600;
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: -0.3px;
  margin-bottom: 16px;
}
.section--dark .section-heading { color: var(--white); }

.section-sub {
  font-size: 1.05rem;
  color: var(--steel);
  max-width: 600px;
  line-height: 1.8;
}
.section--dark .section-sub { color: rgba(255,255,255,0.55); }

.section-header { margin-bottom: 56px; }
.section-header--center { text-align: center; }
.section-header--center .section-sub { margin: 0 auto; }

/* ── MARKETS ─────────────────────────── */
.markets-grid {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.market-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: 50px;
  padding: 14px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--navy);
  transition: border-color 0.2s;
}
.market-item:hover { border-color: var(--accent); }
.market-icon { font-size: 1.1rem; }

/* ── SERVICE TIER (home page) ────────── */
.svc-tier {
  margin-bottom: 56px;
}
.svc-tier:last-child { margin-bottom: 0; }
.svc-tier-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--mist);
}

.services-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.svc-card {
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: 10px;
  padding: 36px 32px;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.2s;
}
.svc-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(37,150,190,0.08);
  transform: translateY(-2px);
}
.svc-card-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--white);
}
.svc-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.svc-card p { font-size: 0.9rem; color: var(--steel); line-height: 1.7; }
.svc-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 16px;
  transition: gap 0.2s;
}
.svc-card:hover .svc-card-link { gap: 10px; }

/* two-col variant for smaller groupings */
.services-overview--2col {
  grid-template-columns: repeat(2, 1fr);
}

/* ── PROCESS STEPS ───────────────────── */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-step {
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: 10px;
}
.process-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
  display: block;
  margin-bottom: 16px;
}
.process-step h4 { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.process-step p { font-size: 0.88rem; color: var(--steel); line-height: 1.7; }

/* ── SERVICES DETAIL ─────────────────── */
.svc-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.svc-detail-card {
  border: 1px solid var(--mist);
  border-radius: 10px;
  padding: 32px;
  background: var(--white);
  transition: border-color 0.2s;
}
.svc-detail-card:hover { border-color: var(--accent); }
.svc-detail-card h4 { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.svc-detail-card p { font-size: 0.9rem; color: var(--steel); line-height: 1.7; }

.svc-hero {
  background: var(--navy);
  padding: 150px 28px 80px;
  color: var(--white);
  position: relative;
}
.svc-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 600px 400px at 80% 50%, rgba(37,150,190,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.svc-hero .container { position: relative; z-index: 1; }
.svc-hero .breadcrumb { font-size: 0.82rem; color: rgba(255,255,255,0.45); margin-bottom: 16px; }
.svc-hero .breadcrumb a { color: var(--accent-glow); transition: color 0.2s; }
.svc-hero .breadcrumb a:hover { color: var(--white); }
.svc-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 16px;
}
.svc-hero p { font-size: 1.05rem; color: rgba(255,255,255,0.6); max-width: 620px; line-height: 1.8; }

/* ── ABOUT ───────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 72px;
  align-items: start;
}
.about-text p { color: var(--steel); margin-bottom: 16px; font-size: 1rem; line-height: 1.8; }
.about-text p:last-child { margin-bottom: 0; }
.credentials-box {
  background: var(--cloud);
  border: 1px solid var(--mist);
  border-radius: 12px;
  padding: 40px;
}
.credentials-box h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 28px;
}
.cred-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--mist);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.cred-item:last-child { border-bottom: none; }
.cred-label { font-size: 0.88rem; color: var(--steel); }
.cred-value { font-weight: 700; color: var(--navy); font-size: 1rem; }

.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.client-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: 10px;
}
.client-card-icon { font-size: 1.6rem; margin-bottom: 12px; }
.client-card h4 { font-size: 0.95rem; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
.client-card p { font-size: 0.82rem; color: var(--steel); line-height: 1.6; }

/* ── CONTACT ─────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 72px;
  align-items: start;
}
.contact-info h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 12px;
}
.contact-info > p { font-size: 0.95rem; color: var(--steel); margin-bottom: 32px; line-height: 1.8; }
.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  font-size: 0.92rem;
  color: var(--slate);
}
.contact-detail-icon {
  width: 36px;
  height: 36px;
  background: var(--cloud);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}
.expect-box {
  margin-top: 36px;
  background: var(--cloud);
  border: 1px solid var(--mist);
  border-radius: 10px;
  padding: 28px;
}
.expect-box h4 { font-size: 0.9rem; font-weight: 700; color: var(--navy); margin-bottom: 14px; }
.expect-list { list-style: none; }
.expect-list li {
  font-size: 0.88rem;
  color: var(--steel);
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.expect-list li::before { content: '—'; color: var(--accent); font-weight: 700; }

.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--slate); letter-spacing: 0.3px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--mist);
  border-radius: 8px;
  font-size: 0.92rem;
  font-family: var(--font-body);
  color: var(--slate);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,150,190,0.08);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.btn-submit {
  background: var(--accent);
  color: var(--white);
  border: none;
  padding: 15px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.btn-submit:hover { background: var(--accent-deep); transform: translateY(-1px); }

/* ── CTA BAND ────────────────────────── */
.cta-band {
  background: var(--navy);
  padding: 80px 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 600px 300px at 50% 50%, rgba(37,150,190,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.cta-band .container { position: relative; z-index: 1; }
.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}
.cta-band p { color: rgba(255,255,255,0.55); margin-bottom: 32px; font-size: 1rem; }

/* ── FOOTER ──────────────────────────── */
.site-footer {
  background: #080f1a;
  color: rgba(255,255,255,0.45);
  padding: 56px 28px 28px;
}
.footer-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 12px; display: inline-block; }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 300px; }
.footer-col h4 { color: var(--white); font-weight: 700; font-size: 0.88rem; letter-spacing: 0.5px; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { font-size: 0.88rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}

/* ── RESPONSIVE ──────────────────────── */
@media (max-width: 900px) {
  .services-overview { grid-template-columns: 1fr 1fr; }
  .services-overview--2col { grid-template-columns: 1fr; }
  .svc-detail-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .clients-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-menu { display: none; }
  .nav-toggle { display: block; }
  .nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0; right: 0;
    background: var(--navy);
    padding: 24px 28px;
    gap: 16px;
    border-top: 1px solid rgba(255,255,255,0.06);
  }
  .services-overview { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero { padding: 140px 28px 80px; }
  .svc-hero { padding: 120px 28px 60px; }
  :root { --section-pad: 64px; }
}