/* Main CSS for billieeilishaiporn.love */
:root {
  --primary-color: #00c6ff;
  --secondary-color: #0072ff;
  --text-color: #333333;
  --background-color: #f8f9fa;
  --accent-color: #00e676;
  --light-color: #ffffff;
  --dark-color: #111111;
  --font-main: 'Poppins', sans-serif;
  --font-secondary: 'Open Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* Utility Classes */
.text-gradient {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: var(--light-color);
  box-shadow: 0 4px 15px rgba(0, 114, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 114, 255, 0.4);
}

.section {
  padding: 80px 0;
}

/* Header Styles */
.header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  padding: 25px 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
  transition: padding 0.3s ease;
}

.header.scrolled {
  padding: 15px 0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo svg {
  width: 35px;
  height: 35px;
  margin-right: 10px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  position: relative;
  transition: all 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--primary-color);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--text-color);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  background-color: var(--light-color);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 80% 10%, rgba(0, 198, 255, 0.1), transparent),
              radial-gradient(circle at 20% 90%, rgba(0, 114, 255, 0.15), transparent);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 10px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: #666;
}

.hero-image {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  width: 45%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image svg {
  width: 100%;
  max-width: 500px;
  height: auto;
}

/* Features Section */
.features {
  background-color: var(--light-color);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.section-description {
  max-width: 600px;
  margin: 0 auto;
  color: #666;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature-card {
  background-color: var(--light-color);
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 114, 255, 0.1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 30px;
  height: 30px;
  fill: var(--light-color);
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
}

.feature-description {
  color: #666;
}

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

.about-content {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 50px;
}

.about-image {
  flex: 1;
  min-width: 300px;
  display: flex;
  justify-content: center;
}

.about-image svg {
  width: 100%;
  max-width: 450px;
  height: auto;
}

.about-text {
  flex: 1;
  min-width: 300px;
}

.about-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.about-description {
  margin-bottom: 30px;
  color: #666;
}

.about-list {
  list-style: none;
  margin-bottom: 30px;
}

.about-list-item {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.about-list-icon {
  margin-right: 10px;
  width: 20px;
  height: 20px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-list-icon svg {
  width: 10px;
  height: 10px;
  fill: var(--light-color);
}

/* Footer */
.footer {
  background-color: #111;
  color: var(--light-color);
  padding: 60px 0 30px;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-widget {
  flex: 1;
  min-width: 200px;
}

.footer-widget-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 25px;
  position: relative;
  display: inline-block;
}

.footer-widget-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 40px;
  height: 2px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.footer-logo svg {
  width: 40px;
  height: 40px;
  margin-right: 10px;
}

.footer-logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--light-color);
}

.footer-about {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-link {
  margin-bottom: 15px;
}

.footer-link a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all 0.3s ease;
}

.footer-link a:hover {
  color: var(--primary-color);
  padding-left: 5px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Media Queries */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .hero-image {
    opacity: 0.3;
    width: 60%;
  }
  
  .hero-content {
    max-width: 100%;
  }
  
  .section-title, .about-title {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.3rem;
  }
  
  .nav-list {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--light-color);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: left 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }
  
  .nav-list.active {
    left: 0;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .about-content {
    flex-direction: column-reverse;
  }
  
  .about-image {
    margin-bottom: 30px;
  }
  
  .feature-card {
    align-items: center;
    text-align: center;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title, .about-title {
    font-size: 1.8rem;
  }
  
  .hero-subtitle, .section-subtitle {
    font-size: 1rem;
  }
}