:root {
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  
  --secondary-50: #ecfdf5;
  --secondary-100: #d1fae5;
  --secondary-200: #a7f3d0;
  --secondary-300: #6ee7b7;
  --secondary-400: #34d399;
  --secondary-500: #10b981;
  --secondary-600: #059669;
  
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(to bottom right, var(--primary-50), var(--secondary-50));
  color: var(--gray-700);
  line-height: 1.5;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-4);
}

header {
  text-align: center;
  margin-bottom: var(--spacing-8);
  padding: var(--spacing-6) 0;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  transform: translateZ(0);
  transition: transform 0.3s ease;
}

header:hover {
  transform: translateZ(20px);
}

h1 {
  font-size: 2.5rem;
  color: var(--primary-700);
  margin-bottom: var(--spacing-2);
  font-weight: 600;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

header p {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 800px;
  margin: 0 auto;
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  perspective: 1000px;
}

@media (min-width: 992px) {
  .calculator-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.input-section, .visual-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.card {
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-md);
  transform-style: preserve-3d;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateZ(10px) rotateX(2deg) rotateY(2deg);
  box-shadow: var(--shadow-lg);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.card:hover::before {
  transform: translateX(100%);
}

h2 {
  color: var(--primary-600);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-4);
  font-weight: 600;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
}

h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1em;
  background: linear-gradient(to bottom, var(--primary-400), var(--primary-600));
  margin-right: var(--spacing-2);
  border-radius: var(--radius-sm);
  transform: translateZ(5px);
}

.input-group {
  margin-bottom: var(--spacing-5);
  position: relative;
  z-index: 1;
}

label {
  display: inline-block;
  margin-bottom: var(--spacing-2);
  font-weight: 500;
  color: var(--gray-700);
  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.5);
}

.tooltip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(to bottom right, var(--primary-400), var(--primary-500));
  color: white;
  font-size: 12px;
  margin-left: var(--spacing-1);
  cursor: help;
  position: relative;
  transform: translateZ(5px);
  transition: transform 0.2s ease;
}

.tooltip:hover {
  transform: translateZ(10px) scale(1.1);
}

.tooltip:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 5px);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--gray-800);
  color: white;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  width: 200px;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.slider-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  position: relative;
  z-index: 1;
}

input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  background: linear-gradient(to right, var(--primary-400) 0%, var(--primary-400) 50%, var(--gray-200) 50%, var(--gray-200) 100%);
  border-radius: 3px;
  position: relative;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: linear-gradient(to bottom right, white, #f8f9fa);
  border: 2px solid var(--primary-500);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.3);
}

.value-display {
  display: flex;
  align-items: center;
  min-width: 100px;
  background: white;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

input[type="number"] {
  width: 60px;
  padding: var(--spacing-1) var(--spacing-2);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  text-align: right;
  transition: border-color 0.2s ease;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.value-display span {
  margin-left: var(--spacing-1);
  color: var(--gray-500);
  font-size: 0.875rem;
}

button {
  background: linear-gradient(to right, var(--primary-600), var(--primary-500));
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-3) var(--spacing-4);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

button:active {
  transform: translateY(1px);
}

button::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 60%);
  transform: scale(0);
  opacity: 0;
  transition: transform 0.6s ease-out, opacity 0.6s ease-out;
}

button:hover::after {
  transform: scale(1);
  opacity: 1;
}

.result {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: var(--spacing-6) 0;
  position: relative;
}

#power-value {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--primary-700);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

#power-unit {
  font-size: 1rem;
  color: var(--gray-500);
  margin-top: var(--spacing-1);
}

.note {
  background-color: var(--gray-50);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
  font-size: 0.875rem;
  color: var(--gray-600);
  position: relative;
  overflow: hidden;
}

.formula-box {
  background-color: var(--gray-50);
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}

.formula {
  background-color: white;
  padding: var(--spacing-3);
  margin: var(--spacing-3) 0;
  border-radius: var(--radius-sm);
  text-align: center;
  font-family: monospace;
  font-size: 1rem;
  border: 1px solid var(--gray-200);
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.3s ease;
}

.formula:hover {
  transform: translateZ(5px);
}

.turbine-container {
  height: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  perspective: 1000px;
}

.turbine-tower {
  width: 30px;
  height: 250px;
  background: linear-gradient(to right, var(--gray-400), var(--gray-300), var(--gray-400));
  border-radius: 15px;
  position: absolute;
  bottom: 40px;
  z-index: 1;
  transform-style: preserve-3d;
  transform: translateZ(-20px);
  box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.2);
}

.turbine-head {
  width: 60px;
  height: 40px;
  background: linear-gradient(to right, var(--gray-500), var(--gray-400));
  position: absolute;
  bottom: 290px;
  border-radius: 10px;
  z-index: 2;
  transform-style: preserve-3d;
  transform: translateZ(-10px);
  box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.2);
}

.turbine-blades {
  position: absolute;
  bottom: 290px;
  width: 200px;
  height: 200px;
  z-index: 3;
  transform-origin: center;
  transition: transform 0.2s linear;
  transform-style: preserve-3d;
}

.turbine-blades::before,
.turbine-blades::after,
.blade-three {
  content: '';
  position: absolute;
  width: 180px;
  height: 35px;
  background: linear-gradient(to right, var(--primary-300), var(--primary-400));
  border-radius: 20px;
  top: 82.5px;
  left: 10px;
  transform-origin: center;
  box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
}

.turbine-blades::before {
  transform: rotate(0deg) translateZ(10px);
}

.turbine-blades::after {
  transform: rotate(120deg) translateZ(10px);
}

.blade-three {
  transform: rotate(240deg) translateZ(10px);
}

.chart-container {
  height: 300px;
  position: relative;
  transform-style: preserve-3d;
}

footer {
  margin-top: var(--spacing-12);
  text-align: center;
  padding: var(--spacing-4) 0;
  color: var(--gray-500);
  font-size: 0.875rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

@keyframes spin {
  0% { transform: rotate(0deg) translateZ(10px); }
  100% { transform: rotate(360deg) translateZ(10px); }
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.75rem;
  }
  
  header p {
    font-size: 1rem;
  }
  
  .turbine-container {
    height: 300px;
  }
  
  .turbine-tower {
    height: 180px;
    bottom: 30px;
  }
  
  .turbine-head {
    bottom: 210px;
  }
  
  .turbine-blades {
    width: 150px;
    height: 150px;
    bottom: 210px;
  }
  
  .turbine-blades::before,
  .turbine-blades::after,
  .blade-three {
    width: 140px;
    height: 25px;
    top: 62.5px;
    left: 5px;
  }
  
  .chart-container {
    height: 250px;
  }
}

#result-card {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

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

.copyright {
  font-weight: 500;
  color: var(--primary-600);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}