:root {
  --primary-color: #f4d03f;
  --primary-dark: #f1c40f;
  --secondary-color: #a8e6cf;
  --accent-color: #ff6b6b;
  --text-dark: #2c3e50;
  --text-light: #7f8c8d;
  --bg-light: #fef9e7;
  --bg-white: #ffffff;
  --border-color: #e8e8e8;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

.hero-section {
  background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
  position: relative;
  overflow: hidden;
  min-height: 100vh;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 40%;
  height: 150%;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0.8;
  z-index: 1;
}

.hero-section::after {
  content: "";
  position: absolute;
  bottom: -30%;
  right: -15%;
  width: 35%;
  height: 100%;
  background: var(--secondary-color);
  border-radius: 50%;
  opacity: 0.6;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.btn-primary-custom {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--text-dark);
  font-weight: 600;
  padding: 12px 30px;
  border-radius: 25px;
  transition: all 0.3s ease;
}

.btn-primary-custom:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--text-dark);
  transform: translateY(-2px);
}

.device-card {
  padding: 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  transition: all 0.3s ease;
}

.device-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.device-container {
  margin-bottom: 5.5rem;
}

img.device-img {
  height: 256px;
  width: auto;
}

.brand-filter {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-dark);
  border-radius: 20px;
  padding: 8px 20px;
  margin: 5px;
  transition: all 0.3s ease;
}

.brand-filter.active,
.brand-filter:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--text-dark);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
}

.device-info-card {
  background: var(--bg-white);
  border-radius: 15px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.expandable-section {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.expandable-header {
  background-color: var(--bg-light);
  padding: 1rem 1.5rem;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

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

.social-links a {
  color: var(--text-dark);
  font-size: 1.5rem;
  margin: 0 10px;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: var(--primary-dark);
}

.footer {
  background-color: var(--text-dark);
  color: white;
  padding: 3rem 0 1rem;
}

@media (max-width: 768px) {
  .hero-section::before {
    width: 60%;
    left: -30%;
  }

  .hero-section::after {
    width: 50%;
    right: -25%;
  }
}