/* ===========================================
   ZeroPDF – Trusted Blue Color Palette
   =========================================== */
:root {
  /* Primary brand */
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-active: #1E40AF;

  /* Backgrounds & surfaces */
  --color-bg: #F8FAFC;
  --color-bg-elevated: #FFFFFF;
  --color-card: #FFFFFF;
  --color-card-hover: #F1F5F9;

  /* Text */
  --color-text: #0F172A;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;

  /* Borders */
  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;

  /* Accent */
  --color-accent-light: #EFF6FF;
  --color-accent: #DBEAFE;   /* used in gradients */

  /* Status */
  --color-success: #10B981;
  --color-error: #EF4444;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================================
   Cards – fully compatible with Trusted Blue
   =========================================== */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-base);
}

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

.card-interactive {
  cursor: pointer;
}

.card-interactive:active {
  transform: translateY(0);
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .card-glass {
  background: rgba(30, 41, 59, 0.7);
  border-color: rgba(255, 255, 255, 0.1);
}

.tool-card {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  height: 100%;
}

.tool-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: var(--text-xl);
}

.tool-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
}

.tool-card p {
  font-size: var(--text-sm);
  margin: 0;
  flex: 1;
}

.feature-card {
  text-align: center;
  padding: var(--space-8);
}

.feature-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.stat-card {
  padding: var(--space-6);
  text-align: center;
}

.stat-value {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--weight-medium);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}