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

html {
  scroll-behavior: smooth;
}

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --background: #ffffff;
  --background-secondary: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --shadow: rgba(0, 0, 0, 0.05);
  --shadow-md: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
  --shadow-xl: rgba(0, 0, 0, 0.2);
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --blur-glass: blur(12px);
}

[data-theme='dark'] {
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --background: #0f172a;
  --background-secondary: #1e293b;
  --card-bg: #1e293b;
  --border: #334155;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-md: rgba(0, 0, 0, 0.4);
  --shadow-lg: rgba(0, 0, 0, 0.5);
  --shadow-xl: rgba(0, 0, 0, 0.6);
}

body {
  font-family:
    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
    Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--gradient-primary);
  z-index: 9999;
  transition: width 0.1s ease;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slide-in-left {
  animation: slideInLeft 0.6s ease-out forwards;
}

.animate-slide-in-right {
  animation: slideInRight 0.6s ease-out forwards;
}

.animate-scale-in {
  animation: scaleIn 0.5s ease-out forwards;
}

/* Navigation */
.navbar {
  background-color: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  transition: all 0.3s ease;
  box-shadow: 0 2px 20px var(--shadow);
}

[data-theme='dark'] .navbar {
  background-color: rgba(15, 23, 42, 0.85);
}

.navbar.scrolled {
  padding: 0.75rem 0;
  box-shadow: 0 4px 30px var(--shadow-md);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 700;
  transition: transform 0.3s ease;
  z-index: 1001;
}

.logo:hover {
  transform: scale(1.05);
}

.logo-icon {
  font-size: 2rem;
  animation: float 3s ease-in-out infinite;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

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

/* Theme Toggle */
.theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px var(--shadow-md);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  text-align: center;
  background: var(--gradient-primary);
  color: white;
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-icon {
  font-size: 6rem;
  margin-bottom: 1rem;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(to bottom, #ffffff 0%, #f0f0f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease-out;
}

.hero-tagline {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
  opacity: 0.95;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-description {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

/* Floating particles effect */
.hero::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  top: -150px;
  right: -150px;
  animation: float 6s ease-in-out infinite;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px var(--shadow-md);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: white;
  color: var(--primary-color);
  font-weight: 700;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border: 2px solid white;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.btn-download {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 2px solid var(--border);
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.1rem;
  transition: all 0.3s ease;
}

.btn-download:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 30px var(--shadow-lg);
}

.btn-download span {
  font-size: 1.5rem;
}

/* Features Section */
.features {
  padding: 6rem 0;
  background: var(--background-secondary);
  position: relative;
}

.section-title {
  font-size: 3rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.2rem;
  margin-bottom: 4rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 0;
}

.feature-card:hover::before {
  opacity: 0.05;
}

.feature-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 40px var(--shadow-lg);
  border-color: var(--primary-light);
}

.feature-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  transition: all 0.4s ease;
  position: relative;
  z-index: 1;
}

.feature-card:hover .feature-icon {
  transform: scale(1.2) rotate(5deg);
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
  transition: color 0.3s ease;
}

.feature-card:hover h3 {
  color: var(--primary-color);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* Download Section */
.download {
  padding: 6rem 0;
  text-align: center;
  background: var(--card-bg);
  position: relative;
  overflow: hidden;
}

.download::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.05;
  animation: float 15s ease-in-out infinite;
}

.download-description {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.download-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* Footer */
.footer {
  background: var(--background-secondary);
  border-top: 1px solid var(--border);
  padding: 4rem 0 1.5rem;
  margin-top: 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-weight: 700;
}

.footer-section h4 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-weight: 600;
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
}

.footer-section a:hover {
  color: var(--primary-color);
  transform: translateX(5px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
}

/* Content Pages */
.content-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 8rem 20px 4rem;
}

.content-page h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  animation: fadeInUp 0.6s ease-out;
}

.content-page .last-updated {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.content-page h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  position: relative;
  padding-left: 1rem;
  border-left: 4px solid var(--primary-color);
}

.content-page h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.content-page p {
  margin-bottom: 1.2rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.content-page ul {
  margin-left: 2rem;
  margin-bottom: 1.5rem;
}

.content-page li {
  margin-bottom: 0.75rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* Auth Pages */
.auth-container {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 20px 2rem;
}

.auth-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 3rem;
  max-width: 500px;
  width: 100%;
  text-align: center;
  box-shadow: 0 10px 40px var(--shadow-lg);
  animation: scaleIn 0.5s ease-out;
}

.auth-icon {
  font-size: 5rem;
  margin-bottom: 1.5rem;
  animation: float 3s ease-in-out infinite;
}

.auth-card h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

.status-success {
  color: var(--success);
  font-weight: 600;
}

.status-error {
  color: var(--error);
  font-weight: 600;
}

.status-warning {
  color: var(--warning);
  font-weight: 600;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 2rem auto;
  animation: fadeInUp 0.6s ease-out;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  background-color: var(--background);
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

/* Success message */
.success-message {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  padding: 1.5rem;
  border-radius: 16px;
  margin-top: 2rem;
  animation: scaleIn 0.5s ease-out;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
}

.success-message strong {
  font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--card-bg);
    backdrop-filter: var(--blur-glass);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -5px 0 20px var(--shadow-lg);
    z-index: 999;
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    font-size: 1.2rem;
    padding: 1rem 2rem;
    width: 80%;
    text-align: center;
    border-radius: 12px;
    transition: all 0.3s ease;
  }

  .nav-links a:hover {
    background: var(--primary-color);
    color: white;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: 7rem 0 3rem;
    min-height: 80vh;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-tagline {
    font-size: 1.3rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-icon {
    font-size: 4.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .feature-card {
    padding: 2rem;
  }

  .auth-card {
    padding: 2rem;
  }

  .content-page {
    padding: 6rem 20px 3rem;
  }

  .content-page h1 {
    font-size: 2rem;
  }

  .content-page h2 {
    font-size: 1.5rem;
  }

  .btn {
    padding: 0.875rem 2rem;
    font-size: 0.95rem;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn-download {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-tagline {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .feature-card {
    padding: 1.5rem;
  }

  .feature-icon {
    font-size: 3rem;
  }

  .navbar {
    padding: 0.75rem 0;
  }

  .logo {
    font-size: 1.25rem;
  }

  .logo-icon {
    font-size: 1.5rem;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Loading Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Smooth Scrolling Offset for Fixed Nav */
section {
  scroll-margin-top: 80px;
}

/* Print Styles */
@media print {
  .navbar,
  .footer,
  .hero-buttons,
  .download-buttons {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}