/* CSS Custom Properties */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #3b82f6;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #0f172a;
  --bg-card: #ffffff;

  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  /* Border Colors */
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Layout */
  --container-max-width: 1250px;
  --header-height: 70px;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Global Scrollbar Styles - Light Blue Theme */
* {
  scrollbar-width: thin;
  scrollbar-color: #87ceeb #f0f8ff;
}

/* Webkit Scrollbar Styles */
*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track {
  background: #f0f8ff;
  border-radius: 4px;
}

*::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #87ceeb 0%, #6bb6ff 50%, #4da6ff 100%);
  border-radius: 4px;
  border: 1px solid #b3d9ff;
  transition: all 0.3s ease;
}

*::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #6bb6ff 0%, #4da6ff 50%, #3399ff 100%);
  border-color: #99ccff;
  box-shadow: 0 0 6px rgba(135, 206, 235, 0.4);
}

*::-webkit-scrollbar-thumb:active {
  background: linear-gradient(180deg, #4da6ff 0%, #3399ff 50%, #2d8cff 100%);
  border-color: #80bfff;
}

*::-webkit-scrollbar-corner {
  background: #f0f8ff;
}

/* Horizontal Scrollbar */
*::-webkit-scrollbar:horizontal {
  height: 8px;
}

/* Body Scrollbar - Slightly Larger */
body::-webkit-scrollbar {
  width: 12px;
}

body::-webkit-scrollbar-track {
  background: #f0f8ff;
  border-radius: 6px;
}

body::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #87ceeb 0%, #6bb6ff 50%, #4da6ff 100%);
  border-radius: 6px;
  border: 2px solid #b3d9ff;
  transition: all 0.3s ease;
}

body::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #6bb6ff 0%, #4da6ff 50%, #3399ff 100%);
  border-color: #99ccff;
  box-shadow: 0 0 8px rgba(135, 206, 235, 0.5);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.nav {
  height: 100%;
}

.nav-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  margin-left: 30px;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  font-size: var(--font-size-xl);
  color: var(--text-primary);
}

.nav-logo {
  width: 32px;
  height: 32px;
}

.nav-menu {
  margin-right: 24px;
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.nav-toggle {
  margin-right: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav-toggle:hover {
  background-color: var(--bg-tertiary);
}

.nav-toggle-icon {
  width: 24px;
  height: 24px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-toggle-close {
  display: none;
}

.nav-toggle.active .nav-toggle-open {
  display: none;
}

.nav-toggle.active .nav-toggle-close {
  display: block;
}

/* Main Content */
.main {
  margin-top: var(--header-height);
}

/* Hero Section */
.hero {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-primary) 100%
  );
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.highlight {
  color: var(--primary-color);
  position: relative;
}

.highlight::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: var(--radius-sm);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-3xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Section */
.features {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

/* Downloads Section */
.downloads {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-primary);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

/* Tech Stack Section */
.tech-stack {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-secondary);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

/* Footer */
.footer {
  background-color: #2e3b5b;
  color: var(--text-inverse);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-visual {
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-showcase {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 500px;
}

.hero-logo {
  width: 100%;
  height: auto;
  max-width: 500px;
  filter: drop-shadow(0 20px 25px rgba(0, 0, 0, 0.1))
    drop-shadow(0 8px 10px rgba(0, 0, 0, 0.06));
  transition: all var(--transition-normal);
}