/* Louka Engineering — plain CSS, blue & white theme */

:root {
  --navy: #0a2540;
  --blue: #1d5bd6;
  --blue-dark: #123a91;
  --blue-light: #eaf1ff;
  --sky: #4d8dff;
  --white: #ffffff;
  --ink: #0f1b2d;
  --muted: #56698a;
  --border: #dbe6f8;
  --radius: 14px;
  --shadow: 0 20px 45px -25px rgba(10, 37, 64, 0.35);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  margin-right: auto;
}

.brand-mark {
  display: inline-block;
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand-name strong {
  color: var(--blue);
}

.main-nav {
  display: flex;
  gap: 28px;
}

.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--navy);
  transition: color 0.2s ease;
}

.main-nav a:hover {
  color: var(--blue);
}

.nav-cta {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  height: 2px;
  width: 100%;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 12px 24px -10px rgba(29, 91, 214, 0.55);
}

.btn-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.btn-outline {
  border-color: var(--border);
  color: var(--navy);
  background: var(--white);
}

.btn-outline:hover {
  border-color: var(--blue);
  color: var(--blue);
}

/* Hero */

.hero {
  background:
    radial-gradient(circle at 15% 20%, rgba(29, 91, 214, 0.12), transparent 45%),
    radial-gradient(circle at 85% 0%, rgba(77, 141, 255, 0.14), transparent 40%),
    linear-gradient(180deg, #f5f8ff 0%, #ffffff 70%);
  padding: 96px 0 72px;
}

.hero-inner {
  text-align: center;
  max-width: 820px;
}

.eyebrow {
  display: inline-block;
  color: var(--blue);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.12;
  margin: 0 0 20px;
  color: var(--navy);
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero h1 span {
  color: var(--blue);
}

.hero-lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 34px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  border-top: 1px solid var(--border);
  padding-top: 36px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--navy);
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
}

/* Sections */

.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--blue-light);
}

.section h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--navy);
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.section-lead {
  max-width: 640px;
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 32px;
}

/* Mission / Vision / Values */

.mvv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.mvv-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.mvv-card h3 {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 18px;
}

.mvv-card p {
  margin: 0;
  color: var(--muted);
}

/* Services */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--sky);
}

.service-num {
  display: inline-block;
  color: var(--sky);
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 10px;
}

.service-card h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 18px;
}

.service-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
}

/* Specs */

.specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.specs-card {
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius);
  padding: 28px;
}

.specs-card h3 {
  margin: 0 0 18px;
  font-size: 17px;
  color: var(--sky);
}

.specs-card ul li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14px;
}

.specs-card ul li:last-child {
  border-bottom: none;
}

.specs-card ul li span {
  color: rgba(255, 255, 255, 0.7);
}

/* Customers */

.customers {
  text-align: center;
}

.customers-inner p {
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto;
}

.clients-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.client-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 108px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.client-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--sky);
}

.client-card img {
  max-width: 100%;
  max-height: 64px;
  width: auto;
  height: auto;
  object-fit: contain;
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 28px;
}

.contact-details li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
}

.contact-details .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--sky);
  font-weight: 700;
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.form-row {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-row label {
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
}

.form-row input,
.form-row textarea {
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: #fbfcff;
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(29, 91, 214, 0.12);
}

.phone-input {
  display: flex;
  align-items: stretch;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #fbfcff;
  overflow: hidden;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.phone-input:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(29, 91, 214, 0.12);
}

.phone-prefix {
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-weight: 600;
  color: var(--navy);
  background: var(--blue-light);
  border-right: 1.5px solid var(--border);
}

.phone-input input {
  flex: 1;
  border: none;
  background: transparent;
  border-radius: 0;
}

.phone-input input:focus {
  outline: none;
  box-shadow: none;
}

.form-submit {
  width: 100%;
  margin-top: 4px;
}

.form-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  min-height: 20px;
  margin: 14px 0 0;
  font-size: 14px;
  font-weight: 600;
}

.form-status.success {
  color: #157a4a;
}

.form-status.error {
  color: #c0362c;
}

/* Footer */

.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.7);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
}

.footer-inner .brand-name {
  color: var(--white);
  font-weight: 700;
  margin-left: 8px;
}

.footer-inner .brand-name strong {
  color: var(--sky);
}

/* Responsive */

@media (max-width: 860px) {
  .main-nav,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header.nav-open .main-nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }

  .site-header.nav-open .nav-cta {
    display: inline-flex;
    position: absolute;
    top: 260px;
    left: 24px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .mvv-grid,
  .specs-grid {
    grid-template-columns: 1fr;
  }

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}