:root {
  --primary-color: #4A90E2;
  --primary-color-dark: #357ABD;
  --primary-gradient: linear-gradient(135deg, #56CCF2 0%, #4A90E2 100%);
  --secondary-color: #6c757d;
  --light-gray: #f8f9fa;
  --white: #ffffff;
  --dark-text: #2c3e50;
  --light-text: #5a6a7a;
  --border-color: #e6e9ed;
  --card-shadow: 0 8px 24px rgba(74, 144, 226, 0.1);
  --font-family: 'Poppins', sans-serif;
  --error-color: #e74c3c;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--dark-text);
  line-height: 1.7;
  background-color: var(--white);
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex-grow: 1;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header */
.header {
  background-color: var(--white);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.8);
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  background-color: rgba(255, 255, 255, 0.9);
}

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

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

.header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Buttons */
.button {
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  font-weight: 500;
  font-size: 1rem;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.button[disabled] {
    opacity: 0.7;
    cursor: not-allowed;
}


.button-primary {
  background-image: var(--primary-gradient);
  background-size: 200% auto;
  color: var(--white);
  border: none;
}

.button-primary:hover:not([disabled]) {
  background-position: right center;
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(74, 144, 226, 0.3);
}

.button-primary-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.button-primary-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.button-secondary {
  background-color: var(--white);
  color: var(--dark-text);
  border: 1px solid var(--border-color);
}

.button-secondary:hover {
  background-color: #f8f9fa;
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

.button-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 7rem 0;
  background-color: #F9FAFB;
  background-image: radial-gradient(circle at 50% 0%, rgba(74, 144, 226, 0.05), transparent 40%);
  overflow: hidden;
}

.animate-fade-in-up {
  animation: fade-in-up 0.8s ease-out forwards;
  opacity: 0;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--dark-text);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--light-text);
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Features Section */
.features-section {
  padding: 6rem 0;
  background-color: var(--white);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 4rem;
  color: var(--dark-text);
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

.feature-row {
  display: flex;
  align-items: center;
  gap: 4rem;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.feature-row.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-row--reversed {
  flex-direction: row-reverse;
}

.feature-image,
.feature-text-content {
  flex: 1;
}

.feature-image {
  text-align: center;
  background-color: var(--white);
  padding: 2rem;
  border-radius: 16px;
  border: none;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-image:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 32px rgba(74, 144, 226, 0.15);
}

.feature-image svg, .feature-image img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.feature-text-content .feature-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--dark-text);
  position: relative;
  padding-left: 3rem;
}

.feature-text-content .feature-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 4px;
  background-image: var(--primary-gradient);
  border-radius: 2px;
}

.feature-row--reversed .feature-text-content {
  text-align: right;
}
.feature-row--reversed .feature-text-content .feature-title {
  padding-left: 0;
  padding-right: 3rem;
}
.feature-row--reversed .feature-text-content .feature-title::before {
  left: auto;
  right: 0;
}

.feature-text-content .feature-description {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--light-text);
}

/* Contact Section */
.contact-section {
  padding: 6rem 0;
  background-color: var(--light-gray);
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.contact-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-form-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--white);
  padding: 3rem;
  border-radius: 16px;
  box-shadow: var(--card-shadow);
}

.contact-form .form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.contact-form .form-group {
  margin-bottom: 1.5rem;
}

.contact-form label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--dark-text);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-family);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

.contact-form textarea {
  resize: vertical;
}

.contact-form .button {
  width: auto;
  min-width: 180px;
}

.form-success-message {
  text-align: center;
  padding: 2rem;
}

.form-success-message h3 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.form-success-message p {
  font-size: 1.1rem;
  color: var(--light-text);
}

.form-error-message {
  color: var(--error-color);
  margin-bottom: 1rem;
  text-align: center;
}


/* CTA Section */
.cta-section {
    color: var(--white);
    padding: 5rem 2rem;
    text-align: center;
    border-radius: 20px;
    margin: 6rem auto;
    max-width: 1100px;
    width: calc(100% - 40px);
    box-shadow: 0 16px 40px rgba(74, 144, 226, 0.3);
    background-image: var(--primary-gradient);
}

.cta-section .section-title {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .button-primary {
    background: var(--white);
    color: var(--primary-color);
}

.cta-section .button-primary:hover {
    background: var(--white);
    color: var(--primary-color-dark);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

/* Footer */
.footer {
  background-color: #1e2a38;
  color: var(--light-gray);
  padding: 3rem 0;
  text-align: center;
}

.footer .container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer p {
  margin: 0;
  color: #adb5bd;
}

/* Responsive Design */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .feature-row {
    gap: 2rem;
  }
  .feature-text-content .feature-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: 1rem;
  }

  .header nav {
    width: 100%;
    justify-content: center;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-list {
    gap: 4rem;
  }
  .feature-row,
  .feature-row--reversed {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  
  .feature-row--reversed .feature-text-content {
      text-align: center;
  }

  .feature-text-content .feature-title,
  .feature-row--reversed .feature-text-content .feature-title {
    padding-left: 0;
    padding-right: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
  }

  .feature-text-content .feature-title::before {
    position: static;
    transform: none;
  }

  .feature-text-content .feature-description {
    text-align: center;
  }
    
  .contact-form-container {
    padding: 2rem;
  }
}

@media (max-width: 576px) {
    .header nav {
        flex-direction: column;
        gap: 0.5rem;
    }
    .nav-link {
        display: none;
    }
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-cta {
        flex-direction: column;
    }
    .button {
        width: 100%;
    }
    .contact-form .form-grid {
      grid-template-columns: 1fr;
      gap: 0;
    }
    .contact-form .form-group {
      margin-bottom: 1rem;
    }
    .cta-section {
        padding: 4rem 1rem;
        margin: 4rem auto;
    }
}