:root {
  /* Colors */
  --color-background: #0d1117;
  --color-text-primary: #c3d0e5;
  --color-text-secondary: #9fb1d1;
  --color-text-muted: #9ba3b4;
  --color-link: rgb(77, 170, 252);
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-hover: rgba(255, 255, 255, 0.2);
  --color-card-bg: rgba(255, 255, 255, 0.04);

  /* Button Colors */
  --color-btn-primary: rgb(0, 120, 212);
  --color-btn-primary-hover: rgb(0, 91, 164);
  --color-btn-secondary: rgb(37, 41, 46);
  --color-btn-secondary-hover: rgb(51, 57, 64);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 5rem;

  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.75rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.25rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;

  /* Line Heights */
  --line-height-tight: 1.25rem;
  --line-height-normal: 1.75rem;

  /* Border Radius */
  --radius-sm: 5px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Layout */
  --container-width-sm: 95%;
  --container-width-md: 80%;
  --container-width-lg: 75%;

  /* Breakpoints - Mobile First Approach */
  --breakpoint-sm: 480px; /* Small mobile */
  --breakpoint-md: 768px; /* Tablet */
  --breakpoint-lg: 1024px; /* Desktop */
  --breakpoint-xl: 1440px; /* Large desktop */

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-background);
  color: var(--color-text-primary);
}

a {
  color: var(--color-link);
}

.btn {
  padding: 0.7em 0.8em;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

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

.btn-secondary {
  background-color: var(--color-btn-secondary);
  color: var(--color-text-primary);
}

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

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

/* Navbar */

.header {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-lg) 8rem;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  align-items: center;
}

.header .btn {
  padding: 0.4em 1em;
}

.logo-container {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.logo {
  width: 30px;
}

.logo-container-title {
  font-size: var(--font-size-lg);
  font-weight: 500;
}

nav {
  margin: auto 0;
}

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

.navlogo {
  display: none;
}

.navlogo img {
  width: 22px;
  cursor: pointer;
}

.nav li a {
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.nav li a:hover {
  color: var(--color-text-primary);
}

.nav li {
  list-style-type: none;
}

.container-left {
  display: flex;
  gap: var(--spacing-lg);
  flex: 2;
}
.container-right {
  flex: 1;
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

.search-bar {
  background-color: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: inherit;
  padding: var(--spacing-sm) 2.25rem;
  transition: border-color var(--transition-fast);
}

.search-bar:focus {
  outline: none;
  border-color: var(--color-link);
}

.search-box {
  position: relative;
}

.search-icon {
  position: absolute;
  top: 10px;
  left: 11px;
  cursor: pointer;
}

/* Hero */

.hero-content {
  width: 60%;
  margin: auto;
  padding: var(--spacing-3xl) 0;
  display: flex;
  gap: var(--spacing-xl);
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero-content h1 {
  font-size: var(--font-size-6xl);
  text-align: center;
}
.hero-footer {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.download-buttons a {
  margin: 0 var(--spacing-sm);
  font-size: var(--font-size-lg);
}

.hero-links a {
  color: var(--color-link);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.hero-video {
  width: var(--container-width-lg);
  margin: auto;
  background-image: url(images/hero-background.webp);
  text-align: center;
  padding: var(--spacing-3xl);
  border-radius: var(--radius-lg);
}

video {
  width: 95%;
}

.hero-button-container {
  text-align: center;
  margin-top: var(--spacing-md);
}

.hero-video-btn {
  border: none;
  background-color: inherit;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--font-size-lg);
  transition: border var(--transition-normal);
  padding: 0.4em 1em;
}

.hero-video-btn:hover {
  border: 1px solid var(--color-text-muted);
}

.ai-features {
  width: var(--container-width-lg);
  margin: auto;
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-3xl);
  flex-wrap: wrap;
}

.aifeature-card {
  flex: 1;
  background-color: var(--color-card-bg);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  min-width: 200px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast);
}

.aifeature-card:hover {
  border-color: var(--color-border-hover);
}

.aifeature-title {
  font-size: var(--font-size-lg);
  font-weight: 400;
}

.aifeature-subtitle {
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

.aifeature-image {
  width: 95%;
}

/* Features Section - Flexbox Side-by-Side Layout */
.features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
  width: var(--container-width-md);
  margin: var(--spacing-3xl) auto;
}

.feature-cards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
}

.card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-2xl);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
}

.card-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.card-image {
  flex: 1.5;
}

.card-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.card-title {
  color: var(--color-text-primary);
  font-size: var(--font-size-xl);
  font-weight: 500;
}

.card-subtitle {
  color: rgb(159, 177, 209);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

/* Extensions */

.extensions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: var(--container-width-lg);
  margin: auto;
  gap: var(--spacing-3xl);
}

.extension-card img {
  width: 50px;
}

.extensions-content {
  flex: 1;
}

.extensions-grid {
  flex: 2;
  display: flex;
  flex-direction: column;
}

.extensions-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: var(--spacing-md);
  position: relative;
}

.extension-card {
  background-color: var(--color-card-bg);
  padding: var(--spacing-sm) 2.15rem;
  border-radius: var(--radius-lg);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.extension-card:hover {
  border-color: var(--color-border-hover);
}

.ex-sub {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-tight);
}

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

.extension-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.extensions-cards::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.1) 0%,
    rgba(0, 0, 0, 0.5) 100%
  );
  pointer-events: none;
}

.extensions-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.extensions-grid p {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Footer */

.footer-container {
  display: flex;
  justify-content: space-between;
  width: var(--container-width-lg);
  margin: auto;
}

.footer img {
  width: 25px;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--color-text-primary);
}

.footer-right img {
  cursor: pointer;
}

.social-icons {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links {
  display: flex;
  justify-content: space-between;
  gap: 1.75rem;
  align-items: center;
}

footer {
  padding: var(--spacing-4xl) 0;
}

/* Media queries */

/* Small Mobile (320px - 479px) */
@media (max-width: 479px) {
  .hero-content h1 {
    font-size: var(--font-size-3xl);
    padding: 0 var(--spacing-md);
  }

  .mobile-break{
    display: block;
  }

  .hero-video {
    padding: var(--spacing-md);
  }

  .download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .ai-features {
    flex-direction: column;
  }

  .card {
    flex-direction: column;
  }

  .extensions {
    flex-direction: column;
  }
}

/* Mobile (480px - 767px) */
@media (min-width: 480px) and (max-width: 767px) {
  .hero-content h1 {
    font-size: var(--font-size-4xl);
    padding: 0 2.25rem;
  }

  .mobile-break{
    display: block;
  }

  .hero-video {
    padding: var(--spacing-xl);
  }

  .download-buttons .btn {
    font-size: var(--font-size-base);
  }

  .ai-features {
    flex-direction: column;
  }

  .hero-video {
    padding: var(--spacing-2xl);
  }

  .card {
    flex-direction: column;
  }

  .extensions {
    flex-direction: column;
  }

  .extensions-grid {
    width: 100%;
  }
}

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
  .header {
    padding: var(--spacing-lg);
    flex-direction: row;
  }

  .nav,
  .container-right {
    display: none;
  }

  .hero-content h1 {
    font-size: var(--font-size-2xl);
  }

  .hero-content {
    width: 100%;
  }

  .hero-video {
    width: var(--container-width-sm);
  }

  .ai-features {
    width: var(--container-width-sm);
    margin: var(--spacing-2xl) auto;
  }

  .features {
    width: var(--container-width-sm);
  }

  .card {
    padding: 0;
  }

  .footer-container {
    width: var(--container-width-sm);
  }

  .extensions {
    width: var(--container-width-sm);
  }

  .extension-info {
    display: none;
  }

  .extensions-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .extension-card {
    justify-content: center;
    padding: var(--spacing-sm) 0.55rem;
  }

  .navlogo {
    display: block;
  }
}

/* Desktop (1024px - 1439px) */
@media (min-width: 1024px) and (max-width: 1439px) {
  .header {
    flex-direction: column;
    gap: 1.75rem;
  }

  .mobile-break {
    display: block;
  }

  .container-left {
    align-self: flex-start;
  }

  .container-right {
    align-self: flex-end;
  }
}

@media (min-width: 1440px) {
  .mobile-break {
    display: block;
  }
}