/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  /* Colors */
  --color-bg:           #FFFFFF;
  --color-bg-alt:       #F5F5F7;
  --color-bg-off:       #FAFAFA;
  --color-text:         #1A1A2E;
  --color-text-secondary: #555555;
  --color-accent:       #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-cyan:         #06B6D4;
  --color-cyan-hover:   #0891b2;
  --color-footer-bg:    #1A1A2E;
  --color-footer-text:  #CCCCCC;
  --color-white:        #FFFFFF;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: clamp(1.25rem, 2vw, 1.5rem);
  --font-size-2xl: clamp(1.75rem, 3vw, 2.25rem);
  --font-size-hero: clamp(2.5rem, 5vw + 1rem, 4.5rem);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 7rem;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 72px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-nav: 0 1px 8px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
}


/* ============================================
   RESET
   ============================================ */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul[role="list"] { list-style: none; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
address { font-style: normal; }


/* ============================================
   BASE
   ============================================ */
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


/* ============================================
   UTILITIES
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding-block: var(--space-2xl);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section__title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

.section__title--center {
  text-align: center;
}


/* ============================================
   SKIP LINK
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--color-accent);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.skip-link:focus {
  top: var(--space-xs);
}


/* ============================================
   NAVIGATION
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-nav);
}

.site-header:not(.scrolled) .nav {
  color: var(--color-white);
}

.site-header:not(.scrolled) .nav__logo-icon {
  filter: brightness(0) invert(1);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 700;
  font-size: var(--font-size-lg);
  z-index: 101;
}

.nav__logo-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.footer__logo-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  filter: invert(1);
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
  z-index: 101;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

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

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

.nav__menu {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.nav__menu.open {
  transform: translateX(0);
}

.nav__link {
  font-size: var(--font-size-xl);
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-accent);
}

.nav__link.active {
  color: var(--color-accent);
}


/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--color-bg-off);
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__slides {
  position: absolute;
  inset: 0;
}

.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero__slide.active {
  opacity: 1;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.6) 0%,
    rgba(0, 0, 0, 0.3) 40%,
    rgba(0, 0, 0, 0.3) 60%,
    rgba(0, 0, 0, 0.5) 100%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin-inline: auto;
  padding-block: var(--space-2xl);
}

.hero__eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-white);
  opacity: 0.9;
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-size: var(--font-size-hero);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-inline: auto;
}

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


/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  border: 2px solid var(--color-text);
  color: var(--color-text);
  padding: calc(0.875rem - 2px) calc(2rem - 2px);
}

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

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

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}


/* ============================================
   ABOUT
   ============================================ */
.about__grid {
  display: grid;
  gap: var(--space-xl);
}

.about__text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.stat {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
}

.stat__number {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.stat__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.about__visual {
  display: block;
}

.about__image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}


/* ============================================
   SERVICES / CARDS
   ============================================ */
.services__grid {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card--purple {
  border-top-color: var(--color-accent);
}

.card--cyan {
  border-top-color: var(--color-cyan);
}

.card__image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

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

.card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.card__btn {
  margin-top: var(--space-md);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  padding: 0;
}

.card__tag {
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  background-color: var(--color-bg-alt);
  color: var(--color-text-secondary);
}

.card--purple .card__tag {
  background-color: rgba(37, 99, 235, 0.08);
  color: var(--color-accent);
}

.card--cyan .card__tag {
  background-color: rgba(6, 182, 212, 0.08);
  color: var(--color-cyan-hover);
}

.card--accent .card__tag {
  background-color: rgba(37, 99, 235, 0.06);
  color: var(--color-accent);
}


/* ============================================
   CONTACT
   ============================================ */
.contact__card {
  max-width: 600px;
  margin-inline: auto;
  background: var(--color-bg-off);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.contact__icon {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: 2px;
}

.contact__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.contact__link {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.contact__link:hover,
.contact__link:focus-visible {
  color: var(--color-accent-hover);
}

.contact__address {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  line-height: 1.6;
}

.contact__divider {
  height: 1px;
  background: #E5E5E5;
  margin-block: var(--space-md);
}


/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding-block: var(--space-lg);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

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

.footer__name {
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--color-white);
}

.footer__copy {
  font-size: var(--font-size-sm);
}

.footer__top {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-footer-text);
  transition: color var(--transition-fast);
}

.footer__top:hover {
  color: var(--color-white);
}


/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.7s ease forwards;
  opacity: 0;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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


/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .fade-in-up {
    animation: none;
    opacity: 1;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card,
  .btn,
  .nav__menu,
  .nav__toggle-bar,
  .site-header,
  .hero__slide {
    transition: none;
  }
}


/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* 640px+ */
@media (min-width: 640px) {
  .section {
    padding-block: var(--space-3xl);
  }

  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* 768px+ */
@media (min-width: 768px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about__stats {
    gap: var(--space-md);
  }
}

/* 1024px+ */
@media (min-width: 1024px) {
  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    transform: none;
    flex-direction: row;
    background: transparent;
    gap: var(--space-xs);
  }

  .nav__link {
    font-size: var(--font-size-base);
  }

  .about__grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }

}

/* 1280px+ */
@media (min-width: 1280px) {
  .container {
    padding-inline: var(--space-lg);
  }

  .hero__inner {
    max-width: 900px;
  }
}