:root {
  --bg: #0a1a0a;
  --card: rgba(18, 40, 18, 0.85);
  --accent-1: #00ff88;
  --accent-2: #00cc66;
  --accent-3: #66ff33;
  --accent-4: #33cc33;
  --muted: #9eff9e;
  --text: #e6ffe6;
  --glass-border: rgba(0, 255, 136, 0.2);
  --radius: 20px;
  --max-width: 1200px;
  --success: #00ff66;
  --warning: #ffcc00;
  --error: #ff4d4d;
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  --glow: 0 0 20px rgba(0, 255, 136, 0.5);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-top: 80px;
  overflow-x: hidden;
  line-height: 1.6;
  min-height: 100vh;
}

/* Enhanced background with green gradient animation */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 50%, rgba(9, 97, 30, 0.4) 0%, transparent 30%),
    radial-gradient(circle at 85% 30%, rgba(0, 204, 102, 0.35) 0%, transparent 30%),
    radial-gradient(circle at 50% 80%, rgba(102, 255, 51, 0.3) 0%, transparent 30%),
    radial-gradient(circle at 70% 60%, rgba(51, 204, 51, 0.25) 0%, transparent 30%);
  z-index: -2;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 0%, 100% 50%, 50% 100%, 70% 60%;
  }
  25% {
    background-position: 100% 100%, 0% 50%, 50% 0%, 30% 40%;
  }
  50% {
    background-position: 50% 0%, 100% 100%, 0% 50%, 70% 80%;
  }
  75% {
    background-position: 0% 100%, 50% 0%, 100% 50%, 30% 20%;
  }
}

/* Enhanced particle effect with green theme */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  background: rgba(0, 255, 136, 0.6);
  border-radius: 50%;
  opacity: 0;
  animation: float 15s infinite linear;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.particle:nth-child(3n) {
  background: rgba(102, 255, 51, 0.6);
  box-shadow: 0 0 10px rgba(102, 255, 51, 0.5);
}

.particle:nth-child(3n+1) {
  background: rgba(0, 204, 102, 0.6);
  box-shadow: 0 0 10px rgba(0, 204, 102, 0.5);
}

@keyframes float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0.8;
  }
  100% {
    transform: translateY(-100px) rotate(720deg);
    opacity: 0;
  }
}

/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: linear-gradient(135deg, var(--card), rgba(25, 55, 25, 0.95));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 0;
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow), var(--glow);
  transform: translateY(-50px) scale(0.9);
  transition: transform 0.4s ease, opacity 0.4s ease;
  backdrop-filter: blur(20px);
  opacity: 0;
}

.modal.active .modal-content {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.modal-header {
  padding: 24px 24px 16px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
  font-size: 1.8rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.3s;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.modal-close:hover {
  color: var(--accent-1);
  transform: rotate(90deg);
  background: rgba(0, 255, 136, 0.1);
}

.modal-body {
  padding: 24px;
  text-align: center;
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: bounce 2s infinite;
}

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

.modal-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.modal-btn {
  justify-content: center;
  text-decoration: none;
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 1000;
  background: rgba(7, 18, 7, 0.85);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(20px) saturate(180%);
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.nav-scrolled {
  height: 70px;
  background: rgba(7, 18, 7, 0.95);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3), 0 0 15px rgba(0, 255, 136, 0.2);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand .logo {
  width: 45px;
  height: 45px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3), var(--accent-4));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 22px;
  color: #031;
  animation: pulse 3s infinite, rotate 10s infinite linear;
  position: relative;
  overflow: hidden;
  box-shadow: var(--glow);
}

.brand .logo::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: rotate(45deg);
  animation: shine 3s infinite;
}

@keyframes pulse {
  0%, 100% { 
    transform: scale(1); 
    box-shadow: 0 0 0 rgba(0, 255, 136, 0); 
  }
  50% { 
    transform: scale(1.05); 
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.5); 
  }
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes shine {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  position: relative;
  padding: 8px 0;
  transition: all 0.3s;
  font-size: 1rem;
}

.nav-links a:hover {
  color: var(--accent-1);
  transform: translateY(-2px);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  transition: width 0.3s;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  transition: all 0.3s;
}

.nav-toggle:hover {
  color: var(--accent-1);
  transform: scale(1.1);
}

/* Header */
header {
  text-align: center;
  padding: 80px 20px 60px;
  position: relative;
  overflow: hidden;
}

header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(0, 255, 136, 0.1) 0%, transparent 70%);
  z-index: -1;
}

header h1 {
  font-size: 4rem;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-3), var(--accent-4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: glow 3s infinite, textFloat 6s infinite ease-in-out;
  margin-bottom: 20px;
  font-weight: 800;
  text-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

@keyframes glow {
  0%, 100% { 
    text-shadow: 0 0 10px var(--accent-1), 0 0 20px var(--accent-2); 
  }
  50% { 
    text-shadow: 0 0 30px var(--accent-2), 0 0 50px var(--accent-1), 0 0 60px var(--accent-3); 
  }
}

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

header p {
  font-size: 1.3rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
  animation: fadeInUp 1s ease;
}

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

/* Main Content */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px;
}

section.card {
  margin: 30px 0;
  padding: 32px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  transition: all 0.4s ease;
  backdrop-filter: blur(15px);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(30px);
}

section.card.visible {
  opacity: 1;
  transform: translateY(0);
}

section.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
  transition: left 0.6s;
}

section.card:hover::before {
  left: 100%;
}

section.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 50px rgba(0, 204, 102, 0.3), var(--glow);
  border-color: rgba(0, 255, 136, 0.4);
}

section.card h2 {
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--accent-1);
  font-size: 1.8rem;
}

/* Buttons */
.btn {
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  color: #031;
  padding: 14px 28px;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: all 0.3s;
  border: none;
  outline: none;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

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

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 25px rgba(0, 255, 136, 0.4);
}

.btn:active {
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(0, 255, 136, 0.1);
  box-shadow: 0 12px 25px rgba(0, 204, 102, 0.2);
  color: var(--accent-1);
}

/* Form Elements */
.input-box {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.input-group {
  position: relative;
}

.input-group i {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  z-index: 1;
  transition: color 0.3s;
}

.input-group input {
  width: 100%;
  padding: 16px 20px 16px 50px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  font-size: 1rem;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.2);
  background: rgba(0, 0, 0, 0.4);
}

.input-group input:focus + i {
  color: var(--accent-1);
}

.input-group input::placeholder {
  color: rgba(158, 255, 158, 0.6);
}

/* Status Messages */
#status {
  margin-top: 24px;
  padding: 20px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.3);
  border-left: 4px solid var(--muted);
  transition: all 0.3s;
  backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateY(10px);
}

#status.visible {
  opacity: 1;
  transform: translateY(0);
}

#status.success {
  border-left-color: var(--success);
  background: rgba(0, 255, 102, 0.1);
}

#status.error {
  border-left-color: var(--error);
  background: rgba(255, 77, 77, 0.1);
}

#status.warning {
  border-left-color: var(--warning);
  background: rgba(255, 204, 0, 0.1);
}

/* Pairing Code */
.pairing-code {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 10px;
  text-align: center;
  padding: 24px;
  margin: 24px 0;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.pairing-code::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.7s;
}

.pairing-code:hover::before {
  left: 100%;
}

.pairing-code:hover {
  transform: scale(1.02);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.4);
}

/* Instructions */
.instructions {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
  border-left: 4px solid var(--accent-2);
  backdrop-filter: blur(10px);
}

.instructions ol {
  padding-left: 24px;
  margin: 20px 0;
}

.instructions li {
  margin-bottom: 16px;
  line-height: 1.8;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.feature-item {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 12px;
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s;
  border: 1px solid transparent;
  backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateY(20px);
}

.feature-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-item:hover {
  transform: translateY(-8px);
  background: rgba(0, 0, 0, 0.4);
  border-color: var(--glass-border);
  box-shadow: 0 15px 30px rgba(0, 204, 102, 0.3);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: iconPulse 3s infinite;
}

@keyframes iconPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.feature-item h3 {
  margin-bottom: 12px;
  color: var(--accent-1);
}

/* Link Grid */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.link-grid .btn {
  justify-content: center;
  text-align: center;
}

/* Footer */
footer {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
  margin-top: 60px;
  border-top: 1px solid var(--glass-border);
  background: rgba(7, 18, 7, 0.5);
  backdrop-filter: blur(10px);
}

/* Animation for status messages */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}

/* Loading spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--accent-1);
  animation: spin 1s ease-in-out infinite;
  display: inline-block;
}

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

/* ===== Stats Section ===== */
.stats-container {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px 30px;
  min-width: 220px;
  backdrop-filter: blur(15px);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
}

.stat-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.08),
    transparent
  );
  transition: left 0.6s;
}

.stat-card:hover::before {
  left: 100%;
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 204, 102, 0.3), var(--glow);
  border-color: rgba(0, 255, 136, 0.3);
}

.stat-card i {
  font-size: 2rem;
  color: var(--accent-1);
  flex-shrink: 0;
  animation: statIconPulse 2s infinite;
}

@keyframes statIconPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: countUp 1s ease-out;
}

@keyframes countUp {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.stat-label {
  font-size: 0.95rem;
  color: var(--muted);
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* Variant colors */
.stat-card.active i {
  color: var(--success);
}

.stat-card.total i {
  color: var(--accent-3);
}

/* Responsive Design */
@media (max-width: 1024px) {
  header h1 {
    font-size: 3.5rem;
  }
  
  .feature-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 70px;
  }
  
  nav {
    padding: 0 20px;
    height: 70px;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(7, 18, 7, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid var(--glass-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-links a {
    padding: 16px;
    width: 100%;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  
  .nav-links a:last-child {
    border-bottom: none;
  }
  
  .nav-toggle {
    display: block;
  }
  
  header {
    padding: 60px 20px 40px;
  }
  
  header h1 {
    font-size: 2.8rem;
  }
  
  header p {
    font-size: 1.1rem;
  }
  
  main {
    padding: 15px;
  }
  
  section.card {
    padding: 24px 20px;
    margin: 20px 0;
  }
  
  .pairing-code {
    font-size: 1.8rem;
    letter-spacing: 8px;
    padding: 20px;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .link-grid {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    width: 95%;
    margin: 20px;
  }
  
  .modal-buttons {
    flex-direction: column;
  }
  
  .stats-container {
    gap: 20px;
  }
  
  .stat-card {
    min-width: 180px;
    padding: 15px 20px;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 2.2rem;
  }
  
  header p {
    font-size: 1rem;
  }
  
  nav {
    padding: 0 15px;
  }
  
  section.card {
    padding: 20px 16px;
  }
  
  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }
  
  .pairing-code {
    font-size: 1.5rem;
    letter-spacing: 6px;
    padding: 16px;
  }
  
  .input-group input {
    padding: 14px 16px 14px 45px;
  }
  
  .brand .logo {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  
  .stats-container {
    flex-direction: column;
    align-items: center;
  }
  
  .stat-card {
    width: 100%;
    max-width: 280px;
  }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  body::before {
    background-size: 200% 200%;
  }
}

/* Print Styles */
@media print {
  .modal,
  .particles,
  nav {
    display: none;
  }
  
  body {
    background: white;
    color: black;
    padding-top: 0;
  }
}