@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-blue: #007AFF;
  --color-green: #34C759;
  --color-purple: #AF52DE;
  --color-orange: #FF9F0A;
  --color-red: #FF453A;
  --color-bg: #F5F7FA;
  --color-surface: #FFFFFF;
  --color-text-primary: #1D1D1F;
  --color-text-secondary: #86868B;
  --color-border: #E5E7EB;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

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

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

.card-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  box-shadow: var(--shadow-sm);
}

.tool-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.75rem;
  background: var(--color-surface);
  border-radius: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 4rem;
  height: 4rem;
  border-radius: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon i {
  font-size: 1.5rem;
}

.card-icon.blue {
  background: rgba(0,122,255,0.1);
}

.card-icon.blue i {
  color: var(--color-blue);
}

.card-icon.green {
  background: rgba(52,199,89,0.1);
}

.card-icon.green i {
  color: var(--color-green);
}

.card-icon.purple {
  background: rgba(175,82,222,0.1);
}

.card-icon.purple i {
  color: var(--color-purple);
}

.card-icon.orange {
  background: rgba(255,159,10,0.1);
}

.card-icon.orange i {
  color: var(--color-orange);
}

.card-icon.red {
  background: rgba(255,69,58,0.1);
}

.card-icon.red i {
  color: var(--color-red);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  display: block;
}

.card-arrow {
  display: none;
}

.hidden {
  display: none !important;
}

@media (min-width: 640px) {
  .tool-card {
    padding: 2rem;
  }
  .card-icon {
    width: 4.5rem;
    height: 4.5rem;
  }
  .card-icon i {
    font-size: 1.75rem;
  }
  .card-title {
    font-size: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .tool-card {
    padding: 2.25rem;
  }
  .card-icon {
    width: 5rem;
    height: 5rem;
  }
  .card-icon i {
    font-size: 2rem;
  }
  .card-title {
    font-size: 1.375rem;
  }
}