:root {
  /* Brand Colors - Aligned with Mobile App */
  --primary: #1e88e5; /* blue600 */
  --primary-dark: #0d47a1; /* blue900 */
  --primary-light: #e3f2fd; /* blue50 */
  --secondary: #90caf9; /* blue200 */
  --accent: #ffa000; /* amber700 */

  /* UI Colors */
  --background: #ffffff;
  --surface: #f8fafc;
  --text: #1e293b;
  --text-muted: #64748b;
  --white: #ffffff;
  --glass: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);

  /* Typography */
  --font-main: "Poppins", sans-serif;
  --font-heading: "Poppins", sans-serif;
  --font-accent: "Times New Roman", serif; /* Subtle academic touch */

  /* Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.07);

  --radius-lg: 32px;
  --radius-md: 18px;
  --radius-sm: 12px;

  /* Transitions */
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

/* Glassmorphism Header */
solaa-header {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

header {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding: 1rem 0;
  transition: all 0.3s ease;
}

header.scrolled {
  padding: 0.8rem 0;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

/* Hero Section */
.hero {
  padding: 14rem 0 10rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(
      circle at 0% 0%,
      rgba(30, 136, 229, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 100% 100%,
      rgba(144, 202, 249, 0.12) 0%,
      transparent 50%
    );
}

.hero::before {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  z-index: -1;
  background-image:
    radial-gradient(
      circle at 70% 30%,
      rgba(30, 136, 229, 0.03) 0%,
      transparent 40%
    ),
    radial-gradient(
      circle at 30% 70%,
      rgba(144, 202, 249, 0.03) 0%,
      transparent 40%
    );
  animation: rotateMesh 20s linear infinite;
}

@keyframes rotateMesh {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.hero .badge-premium {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 100px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 2rem;
  border: 1px solid rgba(30, 136, 229, 0.1);
  animation: fadeInDown 0.8s ease;
}

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

.hero h1 {
  font-size: clamp(3.5rem, 8vw, 5.5rem);
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 1.5rem;
  line-height: 1.1;
  letter-spacing: -2.5px;
}

.hero h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.3;
  margin-bottom: 2rem;
  color: var(--text);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 500;
}

.hero .description {
  font-size: 1.25rem;
  max-width: 750px;
  margin: 0 auto 4rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.cta-group {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem 2.5rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  font-size: 1.05rem;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 10px 25px -5px rgba(30, 136, 229, 0.4);
  border: none;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 30px -5px rgba(30, 136, 229, 0.5);
}

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

.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-3px);
}

/* Play Store Button Refined */
.play-store-badge {
  display: inline-flex;
  background: #0f172a;
  color: #fff;
  padding: 1.2rem 2.5rem; /* Aligned with .btn */
  border-radius: var(--radius-md); /* Aligned with .btn */
  text-decoration: none;
  align-items: center;
  gap: 0.8rem;
  width: fit-content;
  height: auto;
  min-height: calc(
    1.2rem * 2 + 1.05rem + 4px
  ); /* Approximation to match .btn height */
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.play-store-badge .text .large {
  font-size: 1.05rem; /* Aligned with .btn */
  font-weight: 700;
}

.play-store-badge .coming-soon {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.play-store-badge:hover .coming-soon {
  transform: translateY(0);
}

/* Feature Grid */
.features {
  padding: 6rem 0;
  background: var(--surface);
}

.section-title {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  margin-bottom: 4rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* Feature Card Enhanced */
feature-card {
  background: var(--white);
  padding: 3rem 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: block;
  border: 1px solid rgba(0, 0, 0, 0.03);
  height: 100%;
}

feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(30, 136, 229, 0.1);
}

/* Lifecycle Section */
.lifecycle {
  padding: 10rem 0;
  background: #fff;
  text-align: center;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 5rem;
}

.step-card {
  padding: 2rem;
  position: relative;
}

.step-number {
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin: 0 auto 1.5rem;
  font-size: 1.2rem;
}

.hero-image-container {
  max-width: 1000px;
  margin: 6rem auto 0;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 600px;
}

.step-card h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

.step-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.hero-image:hover {
  transform: scale(1.02);
}

/* Verified Sources Section */
.verified-sources {
  padding: 8rem 0;
  background: var(--surface);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.sources-container {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.source-group {
  text-align: center;
}

.source-group h4 {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 2.5rem;
  position: relative;
  display: inline-block;
}

.source-group h4::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background: var(--primary);
  opacity: 0.5;
}

.source-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.source-tag {
  background: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(30, 136, 229, 0.1);
  transition: var(--transition);
  cursor: default;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.source-tag:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background: var(--primary-light);
}

.source-tag i {
  font-style: normal;
  font-size: 0.8rem;
  opacity: 0.6;
}

.shadow-lg {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Privacy Section Polishing */
.privacy-section {
  padding: 8rem 0;
  background: #fff;
}

.privacy-card {
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  padding: 4rem;
  display: flex;
  align-items: center;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
  border: 1px solid rgba(30, 136, 229, 0.1);
}

.privacy-icon {
  color: var(--primary);
  flex-shrink: 0;
  background: #fff;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

.privacy-text h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.privacy-text p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.btn-outline-alt {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
  text-decoration: none;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  display: inline-block;
}

.btn-outline-alt:hover {
  background: var(--primary);
  color: #fff;
}

@media (max-width: 768px) {
  .privacy-card {
    flex-direction: column;
    text-align: center;
    padding: 3rem 2rem;
  }
}

/* Final Mobile Optimization */
@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }
  .hero {
    padding: 8rem 0 4rem;
  }
  .hero h2 {
    font-size: 2rem;
    padding: 0 1rem;
  }
  .hero .description {
    font-size: 1.1rem;
    padding: 0 1rem;
    margin-bottom: 2.5rem;
  }
  .cta-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 300px;
    margin: 0 auto 3rem !important;
  }
  .btn-outline {
    margin-left: 0;
  }
  .hero-image-container {
    border-radius: var(--radius-md);
    margin: 0 1rem;
  }
  .section-title {
    font-size: 1.8rem;
    margin-bottom: 2.5rem;
  }
  .features {
    padding: 4rem 0;
  }
  .privacy-section {
    padding: 4rem 0;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 3.5rem;
  }
}