/* ============================================================
   MESSAGING MATRIX - Marketing Site Styles
   Design: Minimal, typographic, black & white
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --color-bg: #FFFFFF;
  --color-text: #000000;
  --color-text-secondary: #666666;
  --color-border: #E5E5E5;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --container-width: 1000px;
  --container-padding: 24px;

  --transition: 0.2s ease;
}

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

/* --- Background Canvas --- */
#spacetime-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Container --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* --- Typography --- */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  padding: 32px 0 48px;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 48px;
  width: auto;
}

.logo-header {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.logo-header.visible {
  opacity: 1;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 15px;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--color-text);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 0 80px;
}

.hero-logo {
  width: 120px;
  height: auto;
  margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(40px, 8vw, 64px);
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-tagline {
  font-size: clamp(18px, 3vw, 22px);
  font-weight: 400;
  margin-bottom: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-supporting {
  font-size: clamp(15px, 2vw, 17px);
  color: var(--color-text-secondary);
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  padding: 100px 0;
  border-top: 1px solid var(--color-border);
}

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

.section-title {
  font-size: clamp(28px, 5vw, 36px);
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 16px;
  margin-bottom: 40px;
}

.section-text {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  color: var(--color-text);
  line-height: 1.8;
}

/* ============================================================
   CAPABILITIES
   ============================================================ */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 64px;
  max-width: 800px;
  margin: 0 auto;
}

.capability-card {
  text-align: left;
}

.capability-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.capability-text {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================================
   PARTNERS
   ============================================================ */
.partners-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 64px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.partner-link {
  display: block;
}

.partner-logo {
  height: 48px;
  width: auto;
  opacity: 0.6;
  transition: opacity var(--transition);
}

.partner-link:hover .partner-logo {
  opacity: 1;
}

/* ============================================================
   CTA
   ============================================================ */
.cta-section {
  text-align: center;
  padding: 80px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  background: transparent;
  border: 1.5px solid var(--color-text);
  border-radius: 0;
  cursor: pointer;
  transition: all var(--transition);
}

.btn:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn .arrow {
  transition: transform var(--transition);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 48px 0;
  text-align: center;
}

.footer-text {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .header {
    padding: 16px 0;
  }

  .nav {
    gap: 24px;
  }

  .hero {
    min-height: 70vh;
    padding: 100px 0 60px;
  }

  .section {
    padding: 64px 0;
  }

  .capabilities-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .capability-card {
    text-align: center;
  }

  .partners-grid {
    gap: 32px;
  }

  .cta-section {
    padding: 48px 0;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 20px;
  }

  .nav {
    gap: 16px;
  }

  .nav-link {
    font-size: 14px;
  }

  .partners-grid {
    flex-direction: column;
    gap: 24px;
  }
}