/* ============================================================
   White Light LLC — Corporate Site
   ============================================================ */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --white: #fbfbfd;
  --black: #1d1d1f;
  --gray-light: #f5f5f7;
  --gray-mid: #86868b;
  --gray-dark: #424245;
  --accent: #1d1d1f;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Hiragino Sans", sans-serif;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  overflow-x: hidden;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.nav.scrolled {
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

.nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 22px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 21px;
  font-weight: 700;
  color: var(--black);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 12px;
  color: var(--gray-dark);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--black);
}

/* ---- Hero ---- */
.hero {
  padding: 160px 22px 100px;
  text-align: center;
  background: var(--black);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("hero-bg.jpg") center center / cover no-repeat;
  opacity: 0.5;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-tagline {
  font-size: 17px;
  font-weight: 500;
  color: var(--gray-mid);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.1;
}

.hero-desc {
  font-size: 21px;
  color: #a1a1a6;
  line-height: 1.5;
  margin-top: 20px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Section ---- */
.section {
  padding: 100px 22px;
}

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

.section-dark {
  background: var(--black);
  color: var(--white);
}

.section-inner {
  max-width: 800px;
  margin: 0 auto;
}

.section-inner.center {
  text-align: center;
}

.section-eyebrow {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-mid);
  letter-spacing: -0.2px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.section-body {
  font-size: 19px;
  color: var(--gray-mid);
  line-height: 1.6;
  max-width: 600px;
}

.section-inner.center .section-body {
  margin: 0 auto;
}

/* ---- Products ---- */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 48px;
  max-width: 600px;
}

.product-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 24px;
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.product-icon {
  font-size: 40px;
  flex-shrink: 0;
}

.product-info {
  flex: 1;
  min-width: 0;
}

.product-name {
  font-size: 19px;
  font-weight: 600;
  color: var(--black);
}

.product-desc {
  font-size: 14px;
  color: var(--gray-mid);
  line-height: 1.4;
  margin-top: 4px;
}

.product-arrow {
  font-size: 20px;
  color: var(--gray-mid);
  flex-shrink: 0;
}

/* ---- Company info ---- */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  max-width: 680px;
  margin: 40px auto 0;
  text-align: left;
}

.info-item {
  padding: 18px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.info-item:nth-child(odd) {
  padding-right: 24px;
}

.info-item:nth-child(even) {
  padding-left: 24px;
  border-left: 1px solid rgba(0, 0, 0, 0.06);
}

.info-label {
  font-size: 13px;
  color: var(--gray-mid);
  font-weight: 500;
  margin-bottom: 4px;
}

.info-value {
  font-size: 15px;
  color: var(--black);
  font-weight: 500;
}

/* ---- Contact ---- */
.contact-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

.contact-link {
  display: inline-block;
  padding: 12px 28px;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  color: var(--black);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
}

.contact-link:hover {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.3);
}

/* ---- Footer ---- */
.footer {
  background: var(--black);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 40px 22px;
  text-align: center;
}

.footer-inner {
  max-width: 980px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 21px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.footer-legal {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
}

/* ---- Fade-in ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* ---- Responsive ---- */
@media (max-width: 734px) {
  .hero-title {
    font-size: 40px;
    letter-spacing: -1.5px;
  }

  .hero-desc {
    font-size: 17px;
  }

  .section-title {
    font-size: 32px;
    letter-spacing: -1px;
  }

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

  .info-item:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .info-item:nth-child(odd) {
    padding-right: 0;
  }

  .contact-links {
    flex-direction: column;
    align-items: center;
  }
}