/*
Theme Name: Robotics Gadgets Review
Theme URI: https://example.com/robotics-gadgets-review
Author: OpenAI Assistant
Author URI: https://example.com
Version: 1.0
Description: Theme for a robotics and gadget review site. Integrates modern UX/UI patterns, AI-powered features and comprehensive SEO optimisations. Supports Elementor free version. Includes dark/light mode toggle, PWA readiness, structured data, and accessibility enhancements.
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: robotic-gadgets-theme
*/

/*
 * Variables
 * Define a colour palette inspired by technology: dark blues, silver greys and crisp whites. Provide complementary colours for accents.
 */
:root {
  --color-primary: #0a192f; /* dark blue for headers */
  --color-secondary: #112240; /* slightly lighter shade */
  --color-accent: #64ffda; /* vibrant teal accent */
  --color-text: #8892b0; /* muted text colour */
  --color-bg: #f5f7fa; /* light background */
  --color-card-bg: #ffffff; /* card backgrounds */
  --color-border: #e6ecf0;
  --transition-base: 0.3s ease;
  --radius: 8px;
  --font-primary: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Dark mode palette overrides. Toggled via body.dark-mode class */
body.dark-mode {
  --color-bg: #0a192f;
  --color-card-bg: #112240;
  --color-text: #ccd6f6;
  --color-border: #233554;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-primary);
  line-height: 1.6;
  transition: background-color var(--transition-base), color var(--transition-base);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-card-bg);
  margin: 0 0 0.5em 0;
  line-height: 1.2;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
}

/* Hero section */
.section-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: #fff;
  padding: 4rem 0;
  text-align: center;
  position: relative;
}
.section-hero .hero-content {
  max-width: 800px;
  margin: 0 auto;
}
.section-hero h1 {
  font-size: 2.5rem;
  color: #fff;
}
.section-hero p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: #e6ecf0;
}
.cta-btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: bold;
  text-decoration: none;
  transition: background-color var(--transition-base), color var(--transition-base);
}
.cta-btn:hover {
  background: #52d4b2;
  color: #0a192f;
}

/* Category icons section */
.section-categories {
  background: var(--color-bg);
  padding: 2rem 0;
  text-align: center;
}
.categories-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  justify-content: center;
}
.category-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  text-decoration: none;
  color: inherit;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}
.category-card img {
  width: 64px;
  height: 64px;
  margin-bottom: 0.5rem;
}

/* Product reviews */
.section-reviews {
  background: var(--color-bg);
  padding: 2rem 0;
}
.reviews-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.review-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}
.review-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.review-card .review-body {
  padding: 1rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.review-card .review-title {
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
  color: var(--color-primary);
}
.review-card .review-excerpt {
  flex-grow: 1;
  margin-bottom: 0.75rem;
}
.review-card .review-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text);
}

/* Blog section */
.section-blog {
  background: var(--color-bg);
  padding: 2rem 0;
}
.blog-list {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.blog-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}
.blog-card .blog-title {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  color: var(--color-primary);
}
.blog-card .blog-excerpt {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* Testimonials */
.section-testimonials {
  background: var(--color-bg);
  padding: 2rem 0;
  text-align: center;
}
.testimonials-slider {
  position: relative;
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}
.testimonial-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1rem;
}
.testimonial-item p {
  font-style: italic;
  margin-bottom: 1rem;
}
.testimonial-item .testimonial-author {
  font-weight: bold;
  color: var(--color-primary);
}

/* Community join */
.section-community {
  background: var(--color-bg);
  padding: 2rem 0;
  text-align: center;
}
.community-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}
.community-buttons a {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: bold;
  transition: background-color var(--transition-base), color var(--transition-base);
}
.community-buttons a:hover {
  background: #52d4b2;
  color: #0a192f;
}

/* Newsletter */
.section-newsletter {
  background: var(--color-bg);
  padding: 2rem 0;
  text-align: center;
}
.newsletter-form {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}
.newsletter-form input[type="email"] {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 250px;
}
.newsletter-form button {
  padding: 0.75rem 1.25rem;
  border: none;
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: var(--radius);
  font-weight: bold;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base);
}
.newsletter-form button:hover {
  background: #52d4b2;
  color: #0a192f;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: none;
  z-index: 999;
  transition: background-color var(--transition-base);
}
.back-to-top:hover {
  background: #52d4b2;
}

/* Mobile navigation toggle */
.mobile-nav-toggle {
  display: none;
  position: absolute;
  right: 1rem;
  top: 1rem;
  background: var(--color-accent);
  color: var(--color-primary);
  border: none;
  padding: 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  z-index: 1001;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .section-hero h1 {
    font-size: 2rem;
  }
  .categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
  .review-card img {
    height: 150px;
  }
  .mobile-nav-toggle {
    display: block;
  }
}

@media (max-width: 480px) {
  .section-hero h1 {
    font-size: 1.6rem;
  }
  .newsletter-form input[type="email"] {
    width: 100%;
    max-width: none;
  }
  .newsletter-form {
    flex-direction: column;
  }
}