:root {
  --primary-color: #00d4ff;
  --primary-glow: rgba(0, 212, 255, 0.3);
  --secondary-color: #7c3aed;
  --accent-color: #10b981;
  --dark-bg: #0a0a0f;
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #1a1a2e 100%);
  --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 16px;
  --border-radius-lg: 24px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--text-primary);
  text-shadow: 0 0 10px var(--primary-glow);
}

.landing-container {
  min-height: 100vh;
  background: var(--gradient-dark);
  position: relative;
}

.landing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 5%;
  position: relative;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(10, 10, 15, 0.8);
  border-bottom: 1px solid var(--card-border);
}

.brand {
  display: flex;
  align-items: center;
}

#brand-logo {
  height: 45px;
  width: auto;
  filter: drop-shadow(0 0 10px var(--primary-glow));
  transition: var(--transition-smooth);
}

#brand-logo:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 20px var(--primary-glow));
}

.nav-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.brand-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 3px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

.auth-controls {
  display: flex;
  gap: 0.75rem;
}

.auth-btn {
  padding: 0.625rem 1.25rem;
  background: transparent;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.auth-btn:hover,
.auth-btn.premium-hover:hover {
  background: var(--primary-color);
  color: var(--dark-bg);
  box-shadow: 0 0 25px var(--primary-glow);
  transform: translateY(-2px);
}

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at top center, rgba(0, 212, 255, 0.08) 0%, transparent 60%);
}

.hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 5%;
  text-align: center;
  position: relative;
  z-index: 10;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 80px var(--primary-glow);
  letter-spacing: -2px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 3rem;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-bg-elements {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-circle {
  position: absolute;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0.05;
  filter: blur(80px);
}

.bg-circle-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -200px;
}

.bg-circle-2 {
  width: 400px;
  height: 400px;
  bottom: 10%;
  left: -100px;
}

.bg-circle-3 {
  width: 300px;
  height: 300px;
  top: 40%;
  right: 10%;
}

.premium-float {
  animation: float 6s ease-in-out infinite;
}

.carousel-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.carousel-wrapper {
  flex: 1;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-image-card {
  flex: 0 0 50%;
  padding: 0.5rem;
}

.hero-image-card img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--card-border);
  transition: var(--transition-smooth);
}

.hero-image-card img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.carousel-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--primary-color);
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.carousel-btn:hover {
  background: var(--primary-color);
  color: var(--dark-bg);
  transform: scale(1.1);
  box-shadow: 0 0 25px var(--primary-glow);
}

.premium-section {
  padding: 5rem 5%;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.features {
  background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.02) 50%, transparent 100%);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.feature-card,
.premium-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before,
.premium-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.feature-card:hover,
.premium-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: var(--shadow-glow);
}

.feature-card:hover::before,
.premium-card:hover::before {
  transform: scaleX(1);
}

.feature-icon,
.premium-icon {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
  color: var(--primary-color);
  display: inline-block;
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon,
.premium-card:hover .premium-icon {
  transform: scale(1.15);
  text-shadow: 0 0 30px var(--primary-glow);
}

.feature-card h3,
.premium-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.feature-card p,
.premium-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.pricing {
  background: radial-gradient(ellipse at bottom center, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  text-align: center;
  transition: var(--transition-smooth);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: 'POPULAR';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--dark-bg);
  padding: 0.25rem 1rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-10px);
}

.pricing-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
  margin: 1.5rem 0;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin: 1.5rem 0 2rem;
  text-align: left;
}

.pricing-features li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--card-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li i {
  color: var(--accent-color);
}

.pricing-btn {
  width: 100%;
  padding: 1rem 2rem;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50px;
  color: var(--dark-bg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.pricing-btn:hover {
  transform: scale(1.03);
  box-shadow: 0 0 30px var(--primary-glow);
}

.contact {
  background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.02) 100%);
}

.contact-form-container {
  max-width: 600px;
  margin: 0 auto;
}

.premium-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group,
.premium-input-group {
  position: relative;
}

.premium-input-group input,
.premium-input-group select,
.premium-input-group textarea {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition-smooth);
}

.premium-input-group input:focus,
.premium-input-group select:focus,
.premium-input-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 15px var(--primary-glow);
}

.premium-input-group .input-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  transition: var(--transition-smooth);
  pointer-events: none;
}

.premium-input-group textarea ~ .input-icon {
  top: 1.25rem;
  transform: none;
}

.premium-input-group input:focus ~ .input-icon,
.premium-input-group.filled .input-icon {
  color: var(--primary-color);
}

.floating-label {
  position: absolute;
  left: 3rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
  pointer-events: none;
  transition: var(--transition-smooth);
  background: transparent;
}

.premium-input-group textarea ~ .floating-label {
  top: 1.25rem;
  transform: none;
}

.premium-input-group input:focus ~ .floating-label,
.premium-input-group input:not(:placeholder-shown) ~ .floating-label,
.premium-input-group.filled .floating-label,
.premium-input-group textarea:focus ~ .floating-label,
.premium-input-group textarea:not(:placeholder-shown) ~ .floating-label {
  top: -0.5rem;
  left: 1rem;
  font-size: 0.75rem;
  color: var(--primary-color);
  background: var(--dark-bg);
  padding: 0 0.5rem;
}
.premium-input-group textarea {
    resize: vertical;
    min-height: 120px;
    padding-top: 1.25rem;
    padding-bottom: 1rem;
}
.premium-input-group textarea ~ .floating-label {
    top: 1.25rem;
    transform: none;
}

.premium-input-group textarea:focus ~ .floating-label,
.premium-input-group textarea:not(:placeholder-shown) ~ .floating-label {
    top: -0.5rem;
    left: 1rem;
    font-size: 0.75rem;
    color: var(--primary-color);
    background: var(--dark-bg);
    padding: 0 0.5rem;
}

.premium-input-group textarea ~ .input-icon {
    top: 1.25rem;
    transform: none;
}

.premium-input-group textarea:focus ~ .input-icon,
.premium-input-group.filled textarea ~ .input-icon {
    color: var(--primary-color);
}

.submit-btn,
.premium-submit {
  padding: 1rem 2rem;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50px;
  color: var(--dark-bg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.submit-btn:hover,
.premium-submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px var(--primary-glow);
}

.submit-btn:disabled,
.premium-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.google-btn {
  background: #4285f4 !important;
  color: white !important;
}

.google-btn:hover {
  background: #3367d6 !important;
  box-shadow: 0 10px 30px rgba(66, 133, 244, 0.3) !important;
}

.modal,
.premium-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-content {
  background: linear-gradient(135deg, #1a1a2e 0%, #0a0a0f 100%);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 450px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.close,
.premium-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.75rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  line-height: 1;
}

.close:hover,
.premium-close:hover {
  color: var(--primary-color);
  transform: rotate(90deg);
}

.auth-tabs {
  display: flex;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--card-border);
}

.auth-tab {
  flex: 1;
  padding: 1rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
}

.auth-tab.active {
  color: var(--primary-color);
}

.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

.auth-tab:hover:not(.active) {
  color: var(--text-secondary);
}

.auth-form,
.premium-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.auth-form h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  text-align: center;
}

.auth-link {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.auth-link a {
  color: var(--primary-color);
}

.success-message {
  text-align: center;
  color: var(--accent-color);
  font-size: 1.1rem;
}

.footer {
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.5) 100%);
  border-top: 1px solid var(--card-border);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  text-align: center;
}

.footer-logo {
  height: 50px;
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 10px var(--primary-glow));
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links h4,
.footer-legal h4,
.footer-contact h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links ul,
.footer-legal ul {
  list-style: none;
}

.footer-links li,
.footer-legal li {
  margin-bottom: 0.75rem;
}

.footer-links a,
.footer-legal a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

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

.footer-contact p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.footer-contact a {
  color: var(--primary-color);
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

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

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

@media (max-width: 1024px) {
  .pricing-card.featured {
    transform: scale(1);
  }
  .pricing-card.featured:hover {
    transform: translateY(-10px);
  }
}

@media (max-width: 768px) {
  .landing-nav {
    flex-wrap: wrap;
    padding: 1rem 4%;
    gap: 0.75rem;
  }
  .nav-center {
    position: static;
    transform: none;
    order: 3;
    width: 100%;
    text-align: center;
    margin-top: 0.5rem;
  }
  .brand-text {
    font-size: 1.25rem;
    letter-spacing: 2px;
  }
  #brand-logo {
    height: 35px;
  }
  .auth-controls {
    gap: 0.5rem;
  }
  .auth-btn {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }
  .hero-content {
    padding: 2rem 4%;
  }
  .hero-title {
    letter-spacing: -1px;
  }
  .hero-subtitle {
    margin-bottom: 2rem;
  }
  .hero-image-card {
    flex: 0 0 100%;
  }
  .carousel-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  .premium-section {
    padding: 3rem 4%;
  }
  .section-header {
    margin-bottom: 2.5rem;
  }
  .features-grid,
  .pricing-grid {
    gap: 1rem;
  }
  .feature-card,
  .premium-card {
    padding: 1.5rem;
  }
  .modal-content {
    padding: 1.75rem;
    margin: 1rem;
  }
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  .footer-links a:hover,
  .footer-legal a:hover {
    padding-left: 0;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  .landing-nav {
    padding: 0.75rem 3%;
  }
  .brand-text {
    font-size: 1rem;
  }
  .hero-content {
    padding: 1.5rem 3%;
  }
  .carousel-container {
    padding: 0 0.5rem;
  }
  .carousel-btn {
    width: 35px;
    height: 35px;
  }
  .pricing-card {
    padding: 1.5rem;
  }
  .pricing-price {
    font-size: 2.5rem;
  }
  .premium-input-group input,
  .premium-input-group textarea {
    padding: 0.875rem 0.875rem 0.875rem 2.75rem;
  }
  .floating-label {
    left: 2.75rem;
  }
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--dark-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--card-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}
::selection {
  background: var(--primary-color);
  color: var(--dark-bg);
}
::-moz-selection {
  background: var(--primary-color);
  color: var(--dark-bg);
}
.feature-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 212, 255, 0.25);
}