:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-card: #1e1e1e;
  --border-color: #333;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.1);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.randomize-btn {
  background: var(--accent);
  border: none;
  border-radius: 12px;
  padding: 1rem;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
}

.randomize-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.randomize-btn:active {
  transform: translateY(0);
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.root-display {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-card) 100%
  );
  border-radius: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.root-display::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #8b5cf6, #06b6d4);
}

.root-word {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  color: var(--text-primary);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  animation: fadeInUp 0.6s ease;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.info-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-title::before {
  content: '';
  width: 4px;
  height: 20px;
  background: var(--accent);
  border-radius: 2px;
}

.card-content {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  animation: fadeIn 0.6s ease;
}

.root-meaning {
  font-size: 2.2rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  font-weight: 400;
  animation: fadeInUp 0.6s ease 0.2s both;
}

#origin {
  font-size: 2.2rem;
  font-weight: 500;
}

.example {
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.example:last-child {
  margin-bottom: 0;
}

.example-word {
  color: #e5e7eb;
  font-weight: 600;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.loading {
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .title {
    font-size: 1.75rem;
  }

  .root-display {
    padding: 3rem 1rem;
  }

  .info-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .info-card {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .root-word {
    font-size: 2.5rem;
  }

  .card-content {
    font-size: 1rem;
  }
}