/* about.css: Современная секция "О нас". Grid для layout, градиенты, плавные анимации. */
:root {
  --spacing-xs: clamp(0.5rem, 1vw, 0.75rem);
  --spacing-sm: clamp(1rem, 2vw, 1.5rem);
  --spacing-md: clamp(1.5rem, 3vw, 2rem);
  --spacing-lg: clamp(2rem, 4vw, 3rem);
  --spacing-xl: clamp(2.5rem, 5vw, 4rem);
  
  --primary-color: #0a2540;
  --secondary-color: #444545;
  --accent-color: #5bbad5;
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --border-radius: 0.75rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

main {
  padding-top: 50px;
}

.about-section {
  padding: var(--spacing-xl) 0;
  background: var(--bg-gradient);
  color: var(--secondary-color);
}

.container {
  max-width: 1650px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.about-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.about-title {
  font-size: clamp(1.75rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--secondary-color);
  margin: 0;
  letter-spacing: -0.025em;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

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

.about-lead {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: 1.7;
  color: var(--secondary-color);
  margin: 0;
}

.about-features,
.about-why,
.about-lab {
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.about-features:hover,
.about-why:hover,
.about-lab:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.about-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
  color: var(--primary-color);
  margin: 0 0 var(--spacing-sm) 0;
  border-left: 4px solid var(--accent-color);
  padding-left: var(--spacing-sm);
}

.about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-xs);
}

.about-list li {
  position: relative;
  padding-left: var(--spacing-lg);
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--secondary-color);
  transition: var(--transition);
}

.about-list li:hover {
  color: var(--primary-color);
}

.about-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-color);
  font-size: 1.2em;
  font-weight: bold;
  transition: var(--transition);
}

.about-list li:hover::before {
  transform: translateX(4px);
}

.about-conclusion {
  font-style: italic;
  font-weight: 600;
  font-size: 1.9rem;
  color: var(--primary-color);
  text-align: center;
  margin: var(--spacing-md) 0 0 0;
  padding: var(--spacing-sm);
  background: rgba(91, 186, 213, 0.1);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--accent-color);
}

.about-media {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  min-width: 0;
}

.about-videos {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  width: 100%;
  min-width: 0;
}

.about-video,
.about-media .plyr {
  width: 100%;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  display: block;
  overflow: hidden;
}

.about-video {
  height: auto;
  object-fit: cover;
  background: #000;
}

.about-media .plyr {
  --plyr-color-main: #0a2540;
  --plyr-video-control-color: #ffffff;
  --plyr-video-controls-background: linear-gradient(180deg, rgba(10, 37, 64, 0) 0%, rgba(10, 37, 64, 0.85) 100%);
  --plyr-menu-background: rgba(15, 23, 42, 0.94);
  --plyr-menu-color: #ffffff;
  --plyr-menu-radius: 12px;
}

.about-media .plyr--video {
  background: #000;
}

.about-media .plyr__video-wrapper {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

.about-media .plyr video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Адаптивность */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .about-features,
  .about-why {
    padding: var(--spacing-sm);
  }
  
  .about-subtitle {
    padding-left: var(--spacing-sm);
  }
  
  .about-list li {
    padding-left: var(--spacing-md);
    font-size: 1rem;
  }
  
  .about-conclusion {
    text-align: left;
    padding: var(--spacing-sm);
  }
  
  .about-videos {
    gap: var(--spacing-xs);
  }

  .about-video,
  .about-media .plyr {
    width: 100%;
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .about-section {
    padding: var(--spacing-lg) 0;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .about-title {
    font-size: 1.75rem;
  }
}