/* Base Layer - Professional Theme */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--gradient-header);
  min-height: 100vh;
  transition: all 0.2s ease;
}

/* Typography Hierarchy */
h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

p {
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

small {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* Interactive Elements */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.2s ease;
}

input, select {
  font-family: inherit;
  font-size: var(--text-base);
  border: none;
  outline: none;
  transition: all 0.2s ease;
}

textarea {
  outline: none;
  width: 100%;
  box-sizing: border-box;
  transition: all 0.2s ease;
}

a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color 0.2s ease;
}

/* Focus States */
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary-dark);
  outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface-tertiary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}