/* ===== Design tokens & base ===== */
:root {
  /* Industrial palette: steel blue, dark grey, white */
  --steel-blue: #4a6fa5;
  --steel-blue-dark: #3d5a80;
  --steel-blue-light: #6b8cae;
  --dark-grey: #1e293b;
  --dark-grey-mid: #334155;
  --dark-grey-soft: #475569;
  --white: #ffffff;
  --grey-bg: #f8fafc;
  --grey-border: #e2e8f0;

  /* Spacing & layout */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 5rem;
  --container: min(100% - 2rem, 72rem);
  --container-narrow: min(100% - 2rem, 50rem);

  /* Typography */
  --font: "Inter", system-ui, -apple-system, sans-serif;

  /* Transitions */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --duration: 0.4s;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--dark-grey);
  background: var(--white);
}

/* ----- Layout: grid & container ----- */
.container {
  width: 100%;
  max-width: 72rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* ----- Reveal animation (fade-in + slide-up) ----- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration) var(--ease-out), transform var(--duration) var(--ease-out);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .reveal--visible {
    opacity: 1;
    transform: none;
  }
}

/* ----- Loader ----- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: linear-gradient(165deg, var(--dark-grey) 0%, var(--steel-blue-dark) 100%);
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__logo {
  width: auto;
  max-width: 200px;
  height: auto;
  max-height: 70px;
  object-fit: contain;
  animation: loader-pulse 1.2s ease-in-out infinite;
}

.loader__progress {
  width: 100%;
  max-width: 240px;
}

.loader__progress-track {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  overflow: hidden;
}

.loader__progress-fill {
  height: 100%;
  width: 0%;
  background: var(--white);
  border-radius: 2px;
  transition: width 0.15s ease-out;
}

.loader__text {
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
  font-weight: 500;
}

@keyframes loader-pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

/* ----- Main content ----- */
.content {
  min-height: 100vh;
}

/* ----- Header ----- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 1rem;
  background: var(--dark-grey);
  border-bottom: 1px solid var(--grey-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__logo {
  display: block;
  height: 48px;
  width: auto;
  /* max-width: 160px; */
  object-fit: contain;
  transition: opacity 0.2s ease;
}

.header__logo:hover {
  opacity: 0.9;
}

.header__menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--steel-blue-light);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.header__menu-btn:hover {
  background: rgba(74, 111, 165, 0.15);
  border-color: var(--steel-blue);
}

.header__menu-btn:focus-visible {
  outline: 2px solid var(--steel-blue);
  outline-offset: 2px;
}

.header__menu-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.header__menu-btn[aria-expanded="true"] .header__menu-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__menu-btn[aria-expanded="true"] .header__menu-line:nth-child(2) {
  opacity: 0;
}

.header__menu-btn[aria-expanded="true"] .header__menu-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----- Home banner ----- */
.banner {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  overflow: hidden;
}

.banner__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg, var(--dark-grey) 0%, var(--steel-blue-dark) 50%, var(--dark-grey-mid) 100%);
}

.banner__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 120%, rgba(255, 255, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.banner__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 44rem;
}

.banner__title {
  margin: 0 0 var(--space-md);
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white);
}

.banner__text {
  margin: 0 0 var(--space-xl);
  font-size: clamp(1rem, 2.2vw, 1.1875rem);
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.9);
}

.banner__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.banner__cta {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 6px;
  border: 2px solid transparent;
  transition: background var(--duration) ease, color var(--duration) ease, border-color var(--duration) ease, transform 0.2s ease;
}

.banner__cta--primary {
  color: var(--white);
  background: var(--steel-blue);
  border-color: var(--steel-blue);
}

.banner__cta--primary:hover {
  background: var(--steel-blue-dark);
  border-color: var(--steel-blue-dark);
  transform: translateY(-2px);
}

.banner__cta--secondary {
  color: var(--white);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.6);
}

.banner__cta--secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
  transform: translateY(-2px);
}

.banner__cta:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 4px;
}

.banner__arch {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 70px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-bottom: none;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  pointer-events: none;
}

/* ----- About ----- */
.about {
  padding: var(--space-3xl) var(--space-md);
  background: var(--grey-bg);
  color: var(--dark-grey-mid);
}

.about__inner {
  max-width: 50rem;
  margin: 0 auto;
}

.about__inner.container {
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.about__title {
  margin: 0 0 var(--space-lg);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--dark-grey);
  letter-spacing: -0.02em;
}

.about__content {
  font-size: 1.0625rem;
  line-height: 1.75;
}

.about__content p {
  margin: 0 0 var(--space-md);
}

.about__content p:last-child {
  margin-bottom: 0;
}

.about__lead {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--dark-grey);
}

/* ----- Services ----- */
.services {
  padding: var(--space-3xl) var(--space-md);
  background: var(--white);
  color: var(--dark-grey-mid);
  border-top: 1px solid var(--grey-border);
}

.services__inner {
  max-width: 72rem;
  margin: 0 auto;
}

.services__inner.container {
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.services__title {
  margin: 0 0 var(--space-2xl);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--dark-grey);
  text-align: center;
  letter-spacing: -0.02em;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.service-card {
  padding: var(--space-xl);
  background: var(--white);
  border: 1px solid var(--grey-border);
  border-radius: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  border-color: var(--steel-blue-light);
  box-shadow: 0 8px 24px rgba(30, 41, 59, 0.08);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-md);
  color: var(--steel-blue);
}

.service-card__icon svg {
  flex-shrink: 0;
}

.service-card__title {
  margin: 0 0 var(--space-xs);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--dark-grey);
  line-height: 1.35;
}

.service-card__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--dark-grey-soft);
}

/* Staggered reveal for service cards (20 cards) */
.service-card.reveal:nth-child(1) { transition-delay: 0s; }
.service-card.reveal:nth-child(2) { transition-delay: 0.03s; }
.service-card.reveal:nth-child(3) { transition-delay: 0.06s; }
.service-card.reveal:nth-child(4) { transition-delay: 0.09s; }
.service-card.reveal:nth-child(5) { transition-delay: 0.12s; }
.service-card.reveal:nth-child(6) { transition-delay: 0.15s; }
.service-card.reveal:nth-child(7) { transition-delay: 0.18s; }
.service-card.reveal:nth-child(8) { transition-delay: 0.21s; }
.service-card.reveal:nth-child(9) { transition-delay: 0.24s; }
.service-card.reveal:nth-child(10) { transition-delay: 0.27s; }
.service-card.reveal:nth-child(11) { transition-delay: 0.3s; }
.service-card.reveal:nth-child(12) { transition-delay: 0.33s; }
.service-card.reveal:nth-child(13) { transition-delay: 0.36s; }
.service-card.reveal:nth-child(14) { transition-delay: 0.39s; }
.service-card.reveal:nth-child(15) { transition-delay: 0.42s; }
.service-card.reveal:nth-child(16) { transition-delay: 0.45s; }
.service-card.reveal:nth-child(17) { transition-delay: 0.48s; }
.service-card.reveal:nth-child(18) { transition-delay: 0.51s; }
.service-card.reveal:nth-child(19) { transition-delay: 0.54s; }
.service-card.reveal:nth-child(20) { transition-delay: 0.57s; }

/* ----- Map ----- */
.map {
  padding: var(--space-2xl) 0 0;
  background: var(--grey-bg);
  border-top: 1px solid var(--grey-border);
}

.map__title {
  margin: 0 0 var(--space-lg);
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  color: var(--dark-grey);
  text-align: center;
  letter-spacing: -0.02em;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.map__wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 36%; /* shorter aspect – ~2.8:1 */
  overflow: hidden;
  background: var(--grey-border);
}

.map__iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* ----- Footer ----- */
.footer {
  padding: var(--space-2xl) var(--space-md) var(--space-lg);
  background: var(--dark-grey);
  border-top: 1px solid var(--dark-grey-mid);
  color: rgba(255, 255, 255, 0.85);
}

.footer__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl) var(--space-lg);
}

.footer__inner.container {
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.footer__brand {
  text-align: center;
}

.footer__logo {
  display: block;
  width: auto;
  max-width: 220px;
  height: auto;
  max-height: 80px;
  margin: 0 auto var(--space-md);
  object-fit: contain;
}

.footer__tagline {
  margin: 0;
  font-size: 1rem;
  font-style: italic;
  color: var(--steel-blue-light);
}

.footer__col {
  text-align: center;
}

.footer__col-title {
  margin: 0 0 var(--space-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__address {
  font-style: normal;
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

.footer__col--contact .footer__phones,
.footer__col--contact .footer__email {
  margin: 0 0 var(--space-xs);
  font-size: 0.9375rem;
}

.footer__col--contact .footer__email {
  margin-bottom: 0;
}

.footer__col a {
  color: var(--steel-blue-light);
  text-decoration: none;
}

.footer__col a:hover {
  text-decoration: underline;
  color: var(--white);
}

.footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  align-items: center;
}

.footer__nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

.footer__nav a:hover {
  color: var(--steel-blue-light);
}

.footer__copy {
  margin: 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--dark-grey-mid);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  grid-column: 1 / -1;
}

/* Footer: single row, multiple columns on tablet+ */
@media (min-width: 640px) {
  .footer__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer__inner {
    grid-template-columns: 2fr 1.5fr 1.5fr 1fr;
    gap: var(--space-xl) var(--space-2xl);
    text-align: left;
  }

  .footer__brand {
    text-align: left;
  }

  .footer__logo {
    margin-left: 0;
    margin-right: auto;
  }

  .footer__col {
    text-align: left;
  }

  .footer__col-title {
    margin-bottom: var(--space-md);
  }

  .footer__nav {
    align-items: flex-start;
  }
}

/* ===== Responsive: tablet ===== */
@media (min-width: 640px) {
  :root {
    --container: min(100% - 3rem, 72rem);
  }

  .banner {
    min-height: 70vh;
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
  }

  .about {
    padding: var(--space-3xl) var(--space-lg);
  }

  .about__inner {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }

  .services__grid {
    grid-template-columns: repeat(2, minmax(18rem, 1fr));
    gap: var(--space-lg);
  }

  .services {
    padding: var(--space-3xl) var(--space-lg);
  }

  .footer {
    padding: var(--space-2xl) var(--space-lg) var(--space-lg);
  }
}

/* ===== Responsive: desktop ===== */
@media (min-width: 1024px) {
  .header {
    /* padding: var(--space-md) var(--space-xl); */
  }

  .header__logo {
    height: 52px;
    max-width: 200px;
  }

  .banner {
    min-height: 75vh;
    padding: var(--space-3xl) var(--space-xl) var(--space-2xl);
  }

  .banner__content {
    max-width: 48rem;
  }

  .banner__title {
    margin-bottom: var(--space-lg);
  }

  .banner__text {
    margin-bottom: var(--space-xl);
  }

  .about {
    padding: var(--space-3xl) var(--space-xl);
  }

  .about__inner {
    max-width: 52rem;
  }

  .about__title {
    margin-bottom: var(--space-xl);
  }

  .services {
    padding: var(--space-3xl) var(--space-xl);
  }

  .services__grid {
    grid-template-columns: repeat(2, minmax(22rem, 1fr));
    gap: var(--space-xl);
  }

  .services__title {
    margin-bottom: var(--space-2xl);
  }

  .footer__inner {
    max-width: 72rem;
  }
}

/* ===== Responsive: wide desktop ===== */
@media (min-width: 1280px) {
  .services__grid {
    grid-template-columns: repeat(3, minmax(22rem, 1fr));
  }
}