:root {
  --primary-color: #6a11cb;
  --primary-light: #8e2de2;
  --secondary-color: #2575fc;
  --secondary-light: #4a90e2;
  --accent-color: #ff5e62;
  --accent-light: #ff9966;
  --text-dark: #2c3e50;
  --text-medium: #5d6d7e;
  --text-light: #ecf0f1;
  --bg-light: #f8f9fa;
  --success-color: #2ecc71;
  --error-color: #e74c3c;
  --skin-color: #ec1839;
  --bg-black-900: #000000;
  --bg-black-100: #dddddd;
  --bg-black-50: #eff0f4;
  --text-black-900: #000000;
  --text-black-700: #555555;
  --text-black-600: #666666;
  --text-black-300: #bbbbbb;
  --outer-shadow: 3px 3px 3px #d0d0d0, -3px -3px 3px #f8f8f8;
  --outer-shadow-0: 0 0 0 #d0d0d0, 0 0 0 #f8f8f8;
  --inner-shadow: inset 3px 3px 3px #d0d0d0, inset -3px -3px 3px #f8f8f8;
  --inner-shadow-0: inset 0 0 0 #d0d0d0, inset 0 0 0 #f8f8f8;
  --shadow-sm: 0 1px 3px hsla(0, 0%, 0%, 0.12), 0 1px 2px hsla(0, 0%, 0%, 0.24);
  --shadow-md: 0 4px 6px hsla(0, 0%, 0%, 0.1), 0 1px 3px hsla(0, 0%, 0%, 0.08);
  --shadow-lg: 0 10px 20px hsla(0, 0%, 0%, 0.1), 0 6px 6px hsla(0, 0%, 0%, 0.1);
  --shadow-xl: 0 15px 25px hsla(0, 0%, 0%, 0.15), 0 10px 10px hsla(0, 0%, 0%, 0.1);
  --shadow-inset: inset 0 2px 4px 0 hsla(0, 0%, 0%, 0.06);
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-primary-hover: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
  --gradient-accent: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
  --gradient-glass: linear-gradient(
    135deg,
    hsla(0, 0%, 100%, 0.4),
    hsla(0, 0%, 100%, 0.2)
  );
  --transition-base: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  --font-heading: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color),
    var(--accent-color)
  );
  background-size: 300% 300%;
  animation: gradientBG 15s ease infinite;
  font-family: var(--font-body);
  color: var(--text-dark);
  line-height: 1.6;
  padding: var(--space-md);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.container {
  width: 100%;
  max-width: 800px;
  background: linear-gradient(
    to right bottom,
    rgba(255, 255, 255, 0.9),
    rgba(255, 255, 255, 0.7)
  );
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transform: translateY(0);
  transition: var(--transition-smooth);
  animation: fadeInUp 0.6s ease-out both;
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.container::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--gradient-glass);
  transform: rotate(15deg);
  z-index: -1;
  opacity: 0.5;
}
.container:hover {
  box-shadow: var(--shadow-xl), 0 0 40px rgba(106, 17, 203, 0.2);
  transform: translateY(-5px);
}
.container h2 {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-lg);
  color: var(--text-dark);
  position: relative;
  padding-bottom: var(--space-sm);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 1px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.container h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

.container:hover h2::after {
  width: 120px;
  background: var(--gradient-accent);
}
form .amount {
  margin-bottom: var(--space-xl);
  position: relative;
}

form .amount p {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--text-dark);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

form .amount p::before {
  content: '💰';
  font-size: 1.2em;
}

form .amount input {
  width: 100%;
  height: 60px;
  outline: none;
  padding: 0 var(--space-lg);
  font-size: 1.2rem;
  border-radius: var(--radius-md);
  border: 2px solid rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.9);
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
  color: var(--text-dark);
}

form .amount input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.2),
              var(--shadow-md);
  transform: translateY(-2px);
}

form .amount input::placeholder {
  color: var(--text-medium);
  opacity: 0.6;
}
.dropdown {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  gap: var(--space-lg);
  position: relative;
}

.dropdown .form,
.dropdown .to {
  width: 48%;
  position: relative;
}

.dropdown p {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--text-dark);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.dropdown .form p::before {
  content: '↓';
  color: var(--primary-color);
}

.dropdown .to p::before {
  content: '↑';
  color: var(--accent-color);
}

.select-container {
  display: flex;
  align-items: center;
  height: 60px;
  border-radius: var(--radius-md);
  border: 2px solid rgba(0, 0, 0, 0.1);
  padding: 0 var(--space-md);
  background: rgba(255, 255, 255, 0.9);
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.select-container:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.select-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transition: var(--transition-smooth);
}

.select-container:focus-within::before {
  width: 6px;
  background: var(--gradient-accent);
}

.select-container img {
  width: 32px;
  height: 32px;
  object-fit: cover;
  margin-right: var(--space-sm);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
}

.select-container:hover img {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.select-container select {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  background: transparent;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-dark);
  cursor: pointer;
  appearance: none;
  padding-right: 2rem;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236a11cb' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  background-size: 1.2rem;
  transition: var(--transition-base);
}

.select-container select:focus {
  color: var(--primary-color);
}

/* Swap Button - Enhanced */
.swap-btn {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-bounce);
  box-shadow: var(--shadow-md);
  z-index: 2;
}

.swap-btn:hover {
  background: var(--gradient-accent);
  transform: translateX(-50%) rotate(180deg) scale(1.1);
  box-shadow: var(--shadow-lg);
}

.swap-btn:active {
  transform: translateX(-50%) rotate(180deg) scale(0.95);
}

.swap-btn i {
  font-size: 1.5rem;
}

/* Message Display - Enhanced */
.msg {
  text-align: center;
  font-size: 1.2rem;
  margin-bottom: var(--space-xl);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.msg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-base);
  z-index: -1;
}

.msg.highlight {
  color: white;
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.msg.highlight::before {
  opacity: 1;
}

.msg small {
  display: block;
  font-size: 0.9rem;
  margin-top: var(--space-xs);
  opacity: 0.8;
}

/* Convert Button - Enhanced */
button#convert-btn {
  width: 100%;
  height: 60px;
  border: none;
  outline: none;
  color: black;
  font-size: 1.2rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  cursor: pointer;
  transition: var(--transition-bounce);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  z-index: 1;
  text-transform: uppercase;
  letter-spacing: 1px;
}

button#convert-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-accent);
  transition: var(--transition-smooth);
  z-index: -1;
}

button#convert-btn:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background-color: rgb(from color red ,black , aqua);
}

button#convert-btn:hover::before {
  left: 0;
}

button#convert-btn:active {
  transform: translateY(2px);
}

button#convert-btn i.fa-spinner {
  margin-right: var(--space-sm);
  animation: spin 1s linear infinite;
}

/* Status Indicators */
.loading .msg {
  animation: pulse 1.5s infinite;
}

.success .msg {
  background-color: rgba(46, 204, 113, 0.2);
  color: var(--success-color);
}

.error .msg {
  background-color: rgba(231, 76, 60, 0.2);
  color: var(--error-color);
}

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

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

@keyframes borderGlow {
  0% {
    box-shadow: 0 0 5px rgba(106, 17, 203, 0.5);
  }
  50% {
    box-shadow: 0 0 20px rgba(106, 17, 203, 0.8);
  }
  100% {
    box-shadow: 0 0 5px rgba(106, 17, 203, 0.5);
  }
}

/* Responsive Design - Enhanced */
@media (max-width: 768px) {
  .container {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }
  
  .dropdown {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .dropdown .form,
  .dropdown .to {
    width: 100%;
  }
  
  .swap-btn {
    position: relative;
    left: auto;
    transform: rotate(90deg);
    margin: var(--space-md) 0;
  }
  
  .swap-btn:hover {
    transform: rotate(270deg) scale(1.1);
  }
  
  .container h2 {
    font-size: 1.8rem;
  }
  
  form .amount input,
  .select-container,
  button {
    height: 55px;
  }
}

@media (max-width: 480px) {
  body {
    padding: var(--space-sm);
  }
  
  .container {
    padding: var(--space-md);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
  
  form .amount input,
  .select-container,
  button {
    height: 50px;
    font-size: 1rem;
  }
  
  .msg {
    font-size: 1rem;
    padding: var(--space-sm);
  }
  
  .dropdown p,
  form .amount p {
    font-size: 1rem;
  }
}

/* Micro-interactions - Enhanced */
.select-container:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.2),
              var(--shadow-md);
  animation: borderGlow 2s infinite;
}

/* 3D Card Effect */
.container {
  perspective: 1000px;
}

.container-inner {
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.container:hover .container-inner {
  transform: rotateY(5deg) rotateX(5deg);
}

/* Particle Background Effect (Optional) */
.particle {
  position: absolute;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

/* Accessibility Focus Styles */
*:focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  
  .container {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    background: white !important;
    backdrop-filter: none !important;
  }
  
  button, .swap-btn {
    display: none !important;
  }
}