/* RESET */
html, body, main {
  margin: 0;
  padding: 0;
}
*, *::before, *::after {
  box-sizing: border-box;
}
h1, h2, h3, h4, h5, h6, p {
  margin: 0;
  padding: 0;
}
/* Reset extra spacing on key containers */
.hero-content,
.landscape-container {
  margin: 0;
  padding: 0;
}

/* ROOT VARIABLES */
:root {
  --primary-color: #0000FF;
  --background-color: #0000FF;
  --text-color: #fff;
  --font-family: 'Montserrat', sans-serif;
  
  --base-font-size: 14px;
  --base-line-height: 1.4;
  
  --h1-size: calc(var(--base-font-size) * 2.2);
  --h2-size: calc(var(--base-font-size) * 1.8);
  --h3-size: calc(var(--base-font-size) * 1.3);
  --body-size: var(--base-font-size);
  
  --spacing-unit: 0.75rem;
  /* Universal left/right padding for mobile */
  --left-align: 2rem;
  
  /* On mobile, we let containers span full width;
     on desktop, we'll fix body to 420px. */
  --container-max-width: 100%;
  
  --hero-min-height: 55vh;
}

/* BODY STYLING: Mobile spacing as is */
body {
  font-family: var(--font-family);
  font-size: var(--body-size);
  line-height: var(--base-line-height);
  background-color: var(--background-color);
  color: var(--text-color);
  overflow-x: hidden;
  margin: 0;
  padding-left: var(--left-align);
  padding-right: var(--left-align);
  text-align: left;
}

/* CONTAINER: Full width on mobile */
.container {
  width: var(--container-max-width);
  margin: 0;
  padding: 0;
  text-align: left;
}

/* HERO SECTION (Template for All Sections) */
.hero {
  min-height: var(--hero-min-height);
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: calc(2 * var(--spacing-unit)) 0;
  padding: var(--spacing-unit) 0;
  position: relative;
  overflow: hidden;
}
.hero .container {
  width: var(--container-max-width);
  margin: 0;
  padding: 0;
  text-align: left;
}
/* Ensure hero-content does not add extra padding */
.hero-content {
  padding: 0;
}

/* HERO TYPOGRAPHY */
.hero-title {
  font-size: var(--h2-size);
  font-weight: 700;
  margin-bottom: var(--spacing-unit);
  line-height: 1.2;
}
.hero-subtitle {
  font-size: calc(var(--base-font-size) * 1.25);
  font-weight: 300;
  margin-bottom: calc(1.5 * var(--spacing-unit));
  line-height: 1.3;
}
.hero-tagline {
  font-size: var(--base-font-size);
  font-weight: 300;
  margin-bottom: calc(2 * var(--spacing-unit));
  line-height: 1.4;
  color: var(--text-color);
}

/* CALL-TO-ACTION BUTTON */
.cta {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--text-color);
  background: transparent;
  color: var(--text-color);
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}
.cta:hover,
.cta:focus {
  background: var(--text-color);
  color: var(--background-color);
}

/* HERO GLOBE: Remove any extra top spacing */
#hero-globe {
  width: 100%;
  height: 300px;
  margin: 0 0 var(--spacing-unit) 0;
  overflow: hidden;
  position: relative;
}
#hero-globe canvas {
  display: block;
  margin: 0;
  padding: 0;
}

/* SECTION: All sections mirror the Hero layout */
.section {
  min-height: var(--hero-min-height);
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: calc(2 * var(--spacing-unit)) 0;
  padding: var(--spacing-unit) 0;
  position: relative;
  overflow: hidden;
}
.section .container {
  width: var(--container-max-width);
  margin: 0;
  padding: 0;
  text-align: left;
}
/* Extra space between the landscape (sonar) graphic and text */
.section .landscape-container {
  margin-bottom: calc(2 * var(--spacing-unit));
}

/* SECTION TYPOGRAPHY */
.section h2 {
  font-size: var(--h2-size);
  font-weight: 700;
  margin-bottom: var(--spacing-unit);
  line-height: 1.2;
}
.section p {
  font-size: var(--body-size);
  font-weight: 300;
  margin-bottom: var(--spacing-unit);
  line-height: var(--base-line-height);
}

/* CARDS & PATENT ITEMS: Remove left padding so text aligns with the body */
.card, .patent-item {
  background: var(--primary-color);
  border: 1px solid var(--primary-color);
  border-radius: 4px;
  padding: calc(1.5 * var(--spacing-unit)) calc(1.5 * var(--spacing-unit)) calc(1.5 * var(--spacing-unit)) 0;
  margin-bottom: calc(1.5 * var(--spacing-unit));
  transition: transform 0.2s ease, background-color 0.2s ease;
  text-align: left;
}
.card:hover,
.card:focus,
.patent-item:hover,
.patent-item:focus {
  transform: translateY(-2px);
  background-color: rgba(255, 255, 255, 0.1);
}
.card h3, .patent-item h3 {
  font-size: var(--h3-size);
  font-weight: 700;
  margin-bottom: calc(0.75 * var(--spacing-unit));
  line-height: 1.3;
  transition: color 0.2s ease;
}
.card:hover h3,
.card:focus h3,
.patent-item:hover h3,
.patent-item:focus h3 {
  color: var(--text-color);
}
.card p, .patent-item p {
  font-size: var(--body-size);
  font-weight: 300;
  margin-bottom: var(--spacing-unit);
  line-height: var(--base-line-height);
}

/* PATENT LINK */
.patent-link {
  text-decoration: none;
  color: var(--text-color);
  border: 1px solid var(--text-color);
  padding: 0.5rem 1rem;
  transition: background 0.3s ease, color 0.3s ease;
}
.patent-link:hover,
.patent-link:focus {
  background: var(--text-color);
  color: var(--background-color);
}

/* CONTACT SECTION: Reduced vertical spacing */
.contact-container {
  min-height: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  background-color: var(--background-color);
  margin: 0;
  padding: calc(0.5 * var(--spacing-unit)) 0;
}
.contact-container .container {
  width: var(--container-max-width);
  margin: 0;
  padding: 0;
  text-align: left;
}
.contact-container h2 {
  font-size: var(--h2-size);
  font-weight: 700;
  margin: 0 0 calc(0.25 * var(--spacing-unit)) 0;
  line-height: 1.2;
}
.contact-container p {
  font-size: var(--body-size);
  font-weight: 300;
  margin: 0 0 calc(0.5 * var(--spacing-unit)) 0;
  line-height: var(--base-line-height);
}
.contact-container .cta {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--text-color);
  background: transparent;
  color: var(--text-color);
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}
.contact-container .cta:hover,
.contact-container .cta:focus {
  background: var(--text-color);
  color: var(--background-color);
}

/* FOOTER */
.footer {
  background-color: var(--background-color);
  padding: calc(1.5 * var(--spacing-unit)) 0;
  text-align: left;
  border-top: 1px solid var(--background-color);
  font-size: 0.9rem;
  color: var(--text-color);
}

/* MEDIA QUERIES: DESKTOP FOCUS (min-width: 1024px) */
@media (min-width: 1024px) {
  /* Force a narrow 420px layout in the center on desktop */
  body {
    max-width: 420px;
    margin: 0 auto;
    padding-left: var(--left-align);
    padding-right: var(--left-align);
  }
}