/* --- Global Styles & Variables --- */
:root {
  --scale-factor: 1.25;
  --primary-font: 'Google Sans', sans-serif;
  --text-font: 'Google Sans Text', sans-serif;
  --dark-text: #202124;
  --light-text: #ffffff;
  --grey-text: #5f6368;
  --accent-color: #8a6ff0; /* Purple from buttons */
  --hero-gradient-start: #a1c4fd; /* Light blueish */
  --hero-gradient-end: #6f8ff0;   /* Deeper blueish */
  --update-bg: #fce4ec; /* Pinkish */
  --card-bg: #ffffff;
  --border-radius: calc(var(--scale-factor) * 16px);
  --container-width: calc(var(--scale-factor) * 1100px);
  --section-padding: calc(var(--scale-factor) * 80px) 0;
  --header-height: calc(var(--scale-factor) * 70px);
  --footer-bg: #e0e6a8; /* Light greenish-yellow */
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height); /* Offset scroll position for fixed header */
}

body {
  font-family: var(--text-font);
  color: var(--dark-text);
  line-height: 1.6;
  background-color: #f8f9fa; /* Light background for sections */
}

h1, h2, h3 {
  font-family: var(--primary-font);
  font-weight: 700;
  margin-bottom: calc(var(--scale-factor) * 0.75em);
}

h1 { font-size: calc(var(--scale-factor) * 1.8em); }
h2 { font-size: calc(var(--scale-factor) * 2em); text-align: center; margin-bottom: calc(var(--scale-factor) * 1.5em);}
h3 { font-size: calc(var(--scale-factor) * 1.3em); }

a {
  text-decoration: none;
  color: var(--accent-color);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 calc(var(--scale-factor) * 20px);
}

.no-wrap {
  white-space: nowrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--scale-factor) * 10px) calc(var(--scale-factor) * 25px);
  background-color: var(--accent-color);
  color: var(--light-text);
  border: none;
  margin-top: 10px;
  border-radius: calc(var(--scale-factor) * 25px);
  font-family: var(--primary-font);
  font-weight: 500;
  font-size: calc(var(--scale-factor) * 1em);
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  text-align: center;
}

.button:hover {
  background-color: #755bcf; /* Darker purple */
  transform: translateY(calc(var(--scale-factor) * -2px));
}

.button .material-icons-outlined {
  font-size: calc(var(--scale-factor) * 1.2em);
  margin-left: calc(var(--scale-factor) * 8px);
}

.button.dark {
  background-color: var(--dark-text);
  color: var(--light-text);
}

.button.dark:hover {
  background-color: #4a4a4a;
}

/* --- Header --- */
.site-header {
  position: absolute; /* Position over the hero */
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100; /* Ensure header is above other content */
  padding: 0;
  height: var(--header-height);
  background-color: rgba(0, 0, 0, 0.5); /* 50% black semi-transparent */
  transition: background-color 0.3s ease;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%; /* Make container fill header height */
}


.site-header h1 {
  margin-bottom: 0;
  font-size: calc(var(--scale-factor) * 1.5em);
  display: flex;       /* Aligns children in a row */
  align-items: center; /* Vertically centers the logo and text */
}

.site-header h1 img {
  height: calc(var(--scale-factor) * 50px);
  margin-right: calc(var(--scale-factor) * 10px); /* Adds space to the right of the logo */
}

.site-header h1 a {
  color: var(--light-text); /* White text */
  text-decoration: none;
}

.menu-toggle {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  color: var(--light-text);
  cursor: pointer;
  padding: 10px;
}

.menu-toggle .material-icons-outlined {
    font-size: calc(var(--scale-factor) * 1.8em);
}

/* Style Nav Links */
.site-header nav {
  display: flex;
  gap: calc(var(--scale-factor) * 25px);
}

.site-header nav a {
  color: var(--light-text); /* White text */
  text-decoration: none;
  font-weight: 500;
  font-family: var(--primary-font);
  transition: color 0.3s ease;
  font-size: calc(var(--scale-factor) * 1em);
}

.site-header nav a:hover {
  color: var(--accent-color); /* Highlight color on hover */
}

/* --- Hero Section --- */
.hero {
  min-height: 55vh; /* Reduced height to bring content up */
  background-image: linear-gradient(to bottom, rgba(91, 129, 208, 0.8), rgba(145, 154, 247, 0.9));
  background-size: cover;
  background-position: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center; /* Center content vertically */
  text-align: center;
  padding-top: var(--header-height); /* Add padding to push content below the absolute header */
  padding-bottom: calc(var(--scale-factor) * 60px);
  position: relative; /* Needed for absolute positioning of scroll-down */
}

.hero-content {
  /* Container for text, allows centering */
   max-width: var(--container-width);
   padding: 0 calc(var(--scale-factor) * 20px);
   margin-top: auto; /* Push content towards vertical center */
   margin-bottom: auto; /* Push content towards vertical center */
}

.hero-content h2 {
  color: var(--light-text);
  font-size: calc(var(--scale-factor) * 3em);
  margin-bottom: calc(var(--scale-factor) * 0.8em);
  font-weight: 700;
  text-shadow: 1px 1px calc(var(--scale-factor) * 4px) rgba(0, 0, 0, 0.4);
}

.scroll-down {
  position: absolute;
  bottom: calc(var(--scale-factor) * 40px);
  left: 50%; /* Center horizontally */
  transform: translateX(-50%); /* Fine-tune horizontal centering */
  width: calc(var(--scale-factor) * 55px);
  height: calc(var(--scale-factor) * 55px);
  background-color: rgba(0, 0, 0, 0.5); /* 50% black semi-transparent */
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  animation: bounce 2s infinite;
}
.scroll-down a { /* Target the link inside scroll-down */
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  text-decoration: none;
}


/* Style the arrow itself */
.scroll-down span {
   color: var(--light-text); /* White font color */
   font-size: calc(var(--scale-factor) * 1.5em);
   line-height: 1; /* Prevent extra spacing */
   font-weight: lighter; /* Make arrow thinner if needed */
}


@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); } /* Include translateX */
  40% { transform: translate(-50%, calc(var(--scale-factor) * -10px)); }
  60% { transform: translate(-50%, calc(var(--scale-factor) * -5px)); }
}

/* --- About Section --- */
.about-section {
  padding: var(--section-padding);
  background-color: #fff;
}

.about-section p {
  text-align: center;
  max-width: calc(var(--scale-factor) * 700px);
  margin: 0 auto;
  color: var(--grey-text); /* Use standard grey text */
  font-size: calc(var(--scale-factor) * 1.1em); /* Adjusted paragraph size */
}
/* --- Demos Section --- */
.demos-section {
  padding: var(--section-padding);
  background-color: var(--light-text); /* White background */
}

.demos-grid {
  display: flex;
  flex-direction: column;
  gap: calc(var(--scale-factor) * 80px);
  margin-top: calc(var(--scale-factor) * 30px);
}

.demo-card {
  background-color: transparent; /* Removed card background */
  border-radius: 0;
  overflow: visible;
  box-shadow: none; /* Removed card box-shadow */
  display: flex;
  align-items: center; /* Vertically center items if they have different heights */
  gap: calc(var(--scale-factor) * 50px);
}

/* Alternate card layout */
.demo-card:nth-child(even) {
  flex-direction: row-reverse;
}

/* Style the anchor wrapping the image */
.demo-card > a {
  flex: 0 0 48%; /* Apply flex sizing to the anchor */
  max-width: 48%;
  display: block;   /* Make the anchor behave like a block container */
}

.video-preview-wrapper {
  display: block;   /* Make the anchor behave like a block container */
  border-radius: var(--border-radius); /* Apply rounding to the anchor */
  box-shadow: 0 calc(var(--scale-factor) * 8px) calc(var(--scale-factor) * 25px) rgba(0, 0, 0, 0.1);
  overflow: hidden; /* Keep the image within the rounded corners */
  line-height: 0;   /* Prevent potential extra space below inline/block image */
  aspect-ratio: 1 / 1; /* Make the container a square */
}

/* Style the image inside the anchor */
.video-preview-wrapper video {
  display: block;       /* Ensure image behaves as a block */
  width: 100%;       /* Make image fill the anchor's width */
  height: 100%;       /* Make image fill the anchor's height */
  object-fit: cover;   /* Cover the area, this will now work correctly */
}


.demo-info {
  flex: 1; /* Text content takes remaining space */
  text-align: left;
}

/* Demo tags styling */
.demo-tags {
  margin-bottom: calc(var(--scale-factor) * 12px);
  display: flex;
  gap: calc(var(--scale-factor) * 8px);
  flex-wrap: wrap;
}

.demo-tags span {
  background-color: #e8eaed; /* Light grey background */
  color: var(--grey-text);
  padding: calc(var(--scale-factor) * 4px) calc(var(--scale-factor) * 10px);
  border-radius: calc(var(--scale-factor) * 15px);
  font-size: calc(var(--scale-factor) * 0.8em);
  font-weight: 500;
}

.demo-info h3 {
  margin-bottom: calc(var(--scale-factor) * 10px);
  color: var(--dark-text);
  font-size: calc(var(--scale-factor) * 1.6em);
}

.demo-info p {
  font-size: calc(var(--scale-factor) * 1em);
  color: var(--grey-text);
  margin-bottom: calc(var(--scale-factor) * 25px);
  line-height: 1.6;
}

/* --- Updates Section --- */
.updates-section {
  background-color: var(--update-bg);
  padding: var(--section-padding);
  text-align: center;
}

.updates-section h2 {
  color: var(--dark-text);
  margin-bottom: calc(var(--scale-factor) * 1.5em);
}

.update-form {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap; /* Allow wrapping on small screens */
  gap: calc(var(--scale-factor) * 15px);
  max-width: calc(var(--scale-factor) * 500px);
  margin: 0 auto;
}

.update-form input[type="email"] {
  flex-grow: 1;
  padding: calc(var(--scale-factor) * 12px) calc(var(--scale-factor) * 20px);
  border: 1px solid #ccc; /* Kept at 1px for sharpness */
  border-radius: calc(var(--scale-factor) * 25px);
  font-size: calc(var(--scale-factor) * 1em);
  min-width: calc(var(--scale-factor) * 250px);
}

/* --- FAQ Section --- */
.faq-section {
  padding: var(--section-padding);
  background-color: var(--light-text);
}

.faq-list { /* Container for the details items */
  max-width: calc(var(--scale-factor) * 800px);
  margin: calc(var(--scale-factor) * 30px) auto 0 auto;
  border-top: 1px solid #e0e0e0; /* Kept at 1px */
}

.faq-item { /* Individual <details> element */
  border-bottom: 1px solid #e0e0e0; /* Kept at 1px */
}

.faq-item summary { /* The question part */
  padding: calc(var(--scale-factor) * 18px) calc(var(--scale-factor) * 20px);
  font-size: calc(var(--scale-factor) * 1.1em);
  font-weight: 500;
  font-family: var(--primary-font);
  cursor: pointer;
  list-style: none; /* Remove default marker */
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

.faq-item summary:hover {
  background-color: #f1f3f4;
}

/* Hide default browser marker */
.faq-item summary::marker,
.faq-item summary::-webkit-details-marker {
 display: none;
 content: '';
}

/* Custom marker using ::after */
.faq-item summary::after {
  content: '+'; /* Plus sign for closed state */
  font-size: calc(var(--scale-factor) * 1.6em);
  font-weight: bold; /* Make it bolder */
  line-height: 1; /* Ensure consistent alignment */
  color: var(--grey-text);
  transition: transform 0.2s ease-in-out;
  margin-left: calc(var(--scale-factor) * 10px);
}

.faq-item[open] summary::after {
  content: '\00D7'; /* Multiplication sign (X) for open state */
}

.faq-answer { /* The answer part */
  padding: 0 calc(var(--scale-factor) * 20px) calc(var(--scale-factor) * 20px) calc(var(--scale-factor) * 20px);
  color: var(--grey-text);
  line-height: 1.7;
}

.faq-answer p {
  margin-bottom: 1em;
}
.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer a {
  color: var(--accent-color);
  text-decoration: underline;
}

.faq-answer a:hover {
  color: #755bcf; /* Darker purple */
}

/* --- Footer --- */
.site-footer {
  background-color: var(--footer-bg); /* Use new background color */
  padding: calc(var(--scale-factor) * 25px) 0;
  color: var(--dark-text);           /* Use dark text color */
  font-size: calc(var(--scale-factor) * 0.9em);
  margin-top: 0;
}

/* Add flexbox styling to the container inside the footer */
.site-footer .container {
  display: flex;
  justify-content: space-between; /* Push items to opposite ends */
  align-items: center;           /* Vertically center items */
}

/* Style general links in footer */
.site-footer a,
.site-footer .footer-link {
    color: var(--dark-text);       /* Ensure links are dark */
    text-decoration: none;         /* Remove underline */
    transition: opacity 0.3s ease;   /* Add hover effect */
}

.site-footer a:hover,
.site-footer .footer-link:hover {
   opacity: 0.7;               /* Dim links slightly on hover */
}

/* Style the right-side social media section */
.footer-social {
    display: flex;
    align-items: center;           /* Align "Follow us" text and icons vertically */
    gap: calc(var(--scale-factor) * 12px);
}

.follow-us-text {
   margin-right: calc(var(--scale-factor) * 4px);
}

/* Style individual social icons (the links) */
.social-icon {
    display: inline-flex; /* Use flex to help center icon content if needed */
    align-items: center;
    justify-content: center;
    line-height: 1;       /* Prevent extra vertical space */
}

.social-svg-icon {
    height: calc(var(--scale-factor) * 20px);
    width: calc(var(--scale-factor) * 20px);
}

/* Add this rule for Material Symbols */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined', sans-serif;
  font-weight: normal;
  font-style: normal;
  font-size: calc(var(--scale-factor) * 22px);
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
          font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  vertical-align: middle; /* Align icons nicely with text */
}

/* Optional: Adjust specific icon styles if needed */
.social-icon[aria-label="Twitter"] .material-symbols-outlined {
   font-weight: 400; /* Adjust weight for the X if needed */
   font-size: calc(var(--scale-factor) * 20px);
}

/* View All Projects Button - Styled like the uploaded image (Outlined) */
.demos-section .view-all-button {
  display: block;
  width: fit-content;
  margin: calc(var(--scale-factor) * 80px) auto 0 auto;
  padding: calc(var(--scale-factor) * 10px) calc(var(--scale-factor) * 30px);
  border: 1px solid var(--grey-text); /* Restore the dark grey border */
  color: var(--dark-text);           /* Restore dark text color */
  background-color: transparent;     /* Restore transparent background */
  border-radius: calc(var(--scale-factor) * 25px);
  font-family: var(--primary-font);
  font-weight: 500;
  transition: all 0.3s ease;
  text-decoration: none;
  cursor: pointer;
  font-size: calc(var(--scale-factor) * 1em);
}

.demos-section .view-all-button:hover {
  background-color: #f1f3f4;         /* Restore light grey fill on hover */
  border-color: var(--dark-text);     /* Restore darker border on hover */
  transform: translateY(calc(var(--scale-factor) * -2px));
  color: var(--dark-text);            /* Keep dark text color on hover */
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
  :root {
     --header-height: calc(var(--scale-factor) * 60px);
     --section-padding: calc(var(--scale-factor) * 60px) 0;
  }

  h1 { font-size: calc(var(--scale-factor) * 1.6em); }
  h2 { font-size: calc(var(--scale-factor) * 1.8em); }
  h3 { font-size: calc(var(--scale-factor) * 1.2em); }

  .hero {
     min-height: 60vh;
  }

  .hero-content h2 {
     font-size: calc(var(--scale-factor) * 2.2em);
     line-height: 1.3;
  }

  .site-header .container {
     padding: 0 calc(var(--scale-factor) * 15px);
  }

  .site-header h1 {
     font-size: calc(var(--scale-factor) * 1.3em);
  }

  .menu-toggle {
    display: block;
    z-index: 1001;
  }

   #main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: rgba(32, 33, 36, 0.95);
    flex-direction: column;
    align-items: center;
    padding: calc(var(--scale-factor) * 15px) 0;
    gap: 0;
  }

  #main-nav.active {
    display: flex;
  }

  .site-header nav a {
     padding: calc(var(--scale-factor) * 12px) 0;
     width: 100%;
     text-align: center;
     font-size: calc(var(--scale-factor) * 1.1em);
  }

  .site-header nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--light-text);
  }


  /* Responsive Demo Section */
  .demos-grid {
     gap: calc(var(--scale-factor) * 60px);
  }
  .demo-card,
  .demo-card:nth-child(even) {
     flex-direction: column; /* Stack image and text vertically */
     text-align: center; /* Center text when stacked */
     gap: calc(var(--scale-factor) * 30px);
  }

   .demo-card > a {
     flex-basis: auto; /* Reset flex basis */
     width: 90%; /* Adjust image width for stacked layout */
     margin: 0 auto;
     max-width: calc(var(--scale-factor) * 400px);
   }
  .demo-info {
     text-align: center;
  }
  .demo-tags {
     justify-content: center; /* Center tags */
  }

  .update-form {
     flex-direction: column;
  }

  .update-form input[type="email"],
  .update-form button {
     width: 100%;
  }
  .scroll-down {
     width: calc(var(--scale-factor) * 50px);
     height: calc(var(--scale-factor) * 50px);
     bottom: calc(var(--scale-factor) * 25px);
  }
  .scroll-down span {
     font-size: calc(var(--scale-factor) * 2em);
  }

   .faq-item summary {
     padding: calc(var(--scale-factor) * 15px);
     font-size: calc(var(--scale-factor) * 1em);
   }
   .faq-answer {
     padding: 0 calc(var(--scale-factor) * 15px) calc(var(--scale-factor) * 15px) calc(var(--scale-factor) * 15px);
   }
   .site-footer .container {
     flex-direction: column; /* Stack elements vertically */
     gap: calc(var(--scale-factor) * 15px);
   }
  .footer-social {
     gap: calc(var(--scale-factor) * 10px);
  }
}

@media (max-width: 480px) {
  :root {
     --section-padding: calc(var(--scale-factor) * 50px) 0;
  }
   h2 { font-size: calc(var(--scale-factor) * 1.6em); }

  .hero-content h2 {
     font-size: calc(var(--scale-factor) * 2em);
  }

  .button {
     padding: calc(var(--scale-factor) * 8px) calc(var(--scale-factor) * 20px);
     font-size: calc(var(--scale-factor) * 0.9em);
  }

   .site-header nav a {
     font-size: calc(var(--scale-factor) * 1em);
   }
   .site-header h1 {
     font-size: calc(var(--scale-factor) * 1.2em);
   }

   .scroll-down {
     width: calc(var(--scale-factor) * 45px);
     height: calc(var(--scale-factor) * 45px);
     bottom: calc(var(--scale-factor) * 20px);
   }
   .scroll-down span {
     font-size: calc(var(--scale-factor) * 1.8em);
   }
   .faq-item summary {
     padding: calc(var(--scale-factor) * 12px) calc(var(--scale-factor) * 15px);
   }
   .faq-answer {
     font-size: calc(var(--scale-factor) * 0.95em);
   }
   .demo-card {
     gap: calc(var(--scale-factor) * 20px);
   }
   .demo-card > a {
     width: 100%;
     max-width: 100%;
   }
   .demos-section .view-all-button {
     margin-top: calc(var(--scale-factor) * 50px);
   }
}

.video-responsive {
  overflow: hidden;
  padding-bottom: 56.25%;
  position: relative;
  height: 0;
}

.video-responsive iframe {
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  position: absolute;
}

.demos-section .button-container {
  display: flex;
  justify-content: center; /* Centers the buttons horizontally */
  align-items: center;
  gap: calc(var(--scale-factor) * 20px); /* Adds space between the buttons */
  flex-wrap: wrap; /* Allows buttons to stack on very small screens */
  margin: calc(var(--scale-factor) * 80px) auto 0 auto; /* Applies the original top margin */
}

.demos-section .view-all-button {
  display: inline-block;
  margin: 0;
  width: fit-content;
  padding: calc(var(--scale-factor) * 10px) calc(var(--scale-factor) * 30px);
  border: 1px solid var(--grey-text);
  color: var(--dark-text);
  background-color: transparent;
  border-radius: calc(var(--scale-factor) * 25px);
  font-family: var(--primary-font);
  font-weight: 500;
  transition: all 0.3s ease;
  text-decoration: none;
  cursor: pointer;
  font-size: calc(var(--scale-factor) * 1em);
}

.demos-section .view-all-button:hover {
  background-color: #f1f3f4;
  border-color: var(--dark-text);
  transform: translateY(calc(var(--scale-factor) * -2px));
  color: var(--dark-text);
}