:root {
  --dark-bg: #0a0e27;
  --dark-card: #1a1f3a;
  --dark-hover: #252b4a;
  --primary: #667eea;
  --primary-dark: #5568d3;
  --success: #10b981;
  --info: #06b6d4;
  --warning: #f59e0b;
  --text-light: #e5e7eb;
  --text-muted: #9ca3af;
}

body {
  background-color: var(--dark-bg);
  color: var(--text-light);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Navigation */
.navbar {
  background-color: var(--dark-card) !important;
  border-bottom: 1px solid rgba(102, 126, 234, 0.2);
  backdrop-filter: blur(10px);
}

.navbar-brand {
  color: var(--text-light) !important;
  font-weight: 700;
}

.nav-link {
  color: var(--text-muted) !important;
  transition: color 0.3s ease;
}

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

/* Hero Section with Lynx SVG Background */
.hero-section {
  background: linear-gradient(135deg, rgba(10, 14, 39, 0.95) 0%, rgba(26, 31, 58, 0.95) 100%),
              url('/static/img/lynx.svg') center/cover no-repeat;
  color: white;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-section .container {
  position: relative;
  z-index: 1;
}

.hero-section h1 {
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  animation: fadeInUp 0.8s ease-out;
}

.hero-section .lead {
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-section .btn {
  animation: fadeInUp 0.8s ease-out 0.4s both;
  box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

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

/* Floating Bats Animation */
.hero-section::after {
  content: '🦇';
  position: absolute;
  font-size: 2rem;
  opacity: 0.5;
  animation: float 20s infinite ease-in-out;
  top: 20%;
  left: 10%;
  padding: 0.1rem;
  border: 3px solid rgba(102, 234, 153, 0.29);
  /* border-radius: 0.5rem; */
  background: rgba(26, 31, 58, 0.3);
  backdrop-filter: blur(5px);
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.3),
              inset 0 0 10px rgba(102, 126, 234, 0.1);
}


@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
    border-color: rgba(102, 126, 234, 0.4);
  }
  25% {
    transform: translate(100px, -50px) rotate(10deg);
    border-color: rgba(16, 185, 129, 0.4);
  }
  50% {
    transform: translate(200px, 20px) rotate(-10deg);
    border-color: rgba(6, 182, 212, 0.4);
  }
  75% {
    transform: translate(100px, 50px) rotate(5deg);
    border-color: rgba(245, 158, 11, 0.4);
  }
}

/* Buttons */
.btn-light {
  background: white;
  color: var(--dark-bg);
  font-weight: 600;
  border: none;
  transition: all 0.3s ease;
}

.btn-light:hover {
  background: var(--text-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(102, 126, 234, 0.5);
}

.btn-primary {
  background: var(--primary);
  border: none;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
}

.btn-success {
  background: var(--success);
  border: none;
  transition: all 0.3s ease;
}

.btn-success:hover {
  background: #059669;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
}

/* Sections */
.bg-light {
  background-color: var(--dark-card) !important;
}

section {
  position: relative;
}

.py-5 {
  padding-top: 4rem !important;
  padding-bottom: 4rem !important;
}

/* Feature Icons */
.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.bg-primary {
  background: var(--primary) !important;
}

.bg-success {
  background: var(--success) !important;
}

.bg-info {
  background: var(--info) !important;
}

.text-primary {
  color: var(--primary) !important;
}

.text-success {
  color: var(--success) !important;
}

.text-warning {
  color: var(--warning) !important;
}

.text-muted {
  color: var(--text-muted) !important;
}

/* Cards */
.card {
  background-color: var(--dark-card);
  border: 1px solid rgba(102, 126, 234, 0.2);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

.card-title {
  color: var(--text-light);
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed rgba(102, 126, 234, 0.4);
  border-radius: 0.75rem;
  padding: 2.5rem;
  text-align: center;
  background: rgba(26, 31, 58, 0.5);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.upload-zone::before {
  content: '🌙';
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 1.5rem;
  opacity: 0.3;
}

.upload-zone:hover {
  border-color: var(--primary);
  background: rgba(102, 126, 234, 0.1);
  transform: scale(1.02);
}

.form-control {
  background-color: var(--dark-hover);
  border: 1px solid rgba(102, 126, 234, 0.3);
  color: var(--text-light);
}

.form-control:focus {
  background-color: var(--dark-hover);
  border-color: var(--primary);
  color: var(--text-light);
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.input-group-text {
  background-color: var(--dark-hover);
  border: 1px solid rgba(102, 126, 234, 0.3);
  color: var(--text-muted);
}

/* Alerts */
.alert {
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.alert-info {
  background-color: rgba(6, 182, 212, 0.15);
  color: var(--info);
  border-left: 4px solid var(--info);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border-left: 4px solid var(--success);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border-left: 4px solid var(--warning);
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border-left: 4px solid #ef4444;
}

.alert-secondary {
  background-color: rgba(107, 114, 128, 0.15);
  color: var(--text-muted);
  border-left: 4px solid var(--text-muted);
}

/* Progress Bar */
.progress {
  background-color: var(--dark-hover);
  border-radius: 0.5rem;
  overflow: hidden;
}

.progress-bar {
  background: linear-gradient(90deg, var(--primary), var(--success));
  transition: width 0.3s ease;
}

.progress-container {
  margin-top: 1rem;
}

/* Images */
img {
  border-radius: 0.75rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Footer */
footer {
  background-color: var(--dark-card) !important;
  border-top: 1px solid rgba(102, 126, 234, 0.2);
}

footer .text-muted {
  color: var(--text-muted) !important;
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Bat Icon Animation in Steps */
#how-it-works .feature-icon {
  animation: pulse 2s infinite;
}

#how-it-works .col-md-4:nth-child(1) .feature-icon {
  animation-delay: 0s;
}

#how-it-works .col-md-4:nth-child(2) .feature-icon {
  animation-delay: 0.3s;
}

#how-it-works .col-md-4:nth-child(3) .feature-icon {
  animation-delay: 0.6s;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }
  50% {
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.6);
  }
}

/* Night stars effect */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(2px 2px at 20% 30%, white, transparent),
    radial-gradient(2px 2px at 60% 70%, white, transparent),
    radial-gradient(1px 1px at 50% 50%, white, transparent),
    radial-gradient(1px 1px at 80% 10%, white, transparent),
    radial-gradient(2px 2px at 90% 60%, white, transparent),
    radial-gradient(1px 1px at 33% 85%, white, transparent);
  background-size: 200% 200%;
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
  animation: twinkle 5s infinite;
}

@keyframes twinkle {
  0%, 100% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.5;
  }
}

/* Ensure content is above stars */
.navbar, section, footer {
  position: relative;
  z-index: 1;
}

/* Success Modal Styles */
.success-icon-wrapper {
  position: relative;
  display: inline-block;
}

.success-icon-wrapper i {
  animation: successPulse 0.6s ease-out;
}

@keyframes successPulse {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.bat-celebration {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  animation: batFloat 2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes batFloat {
  0%, 100% {
    transform: translate(-50%, -50%) translateY(0);
  }
  50% {
    transform: translate(-50%, -50%) translateY(-20px);
  }
}

.modal-content {
  background-color: var(--dark-card);
  border: 1px solid rgba(102, 126, 234, 0.3);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
}

.modal-header .btn-close {
  filter: invert(1);
  opacity: 0.5;
}

.modal-header .btn-close:hover {
  opacity: 1;
}

.modal-body .alert {
  background-color: rgba(6, 182, 212, 0.15);
  border-left: 4px solid var(--info);
  color: var(--text-light);
}

.modal-body .alert strong {
  color: var(--info);
}

.modal-body .alert ul {
  color: var(--text-muted);
}

.modal-body .alert ul li {
  margin: 0.25rem 0;
}