html {
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: clamp(14px, 4vw, 16px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--page-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1 {
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  margin: 0;
  padding: 8px 0 2px 0;
}

h2 {
  font-size: clamp(20px, 4vw, 24px);
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
  padding: 6px 0 2px 0;
}

button {
  padding: 5px 10px;
  border-radius: 3px;
  border: 1px solid var(--ui-border);
  background-color: var(--ui-bg);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.1s ease;
}

button:hover {
  background-color: var(--ui-hover);
  border-color: var(--ui-border);
}

button:active {
  transform: scale(0.99);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: opacity 0.15s ease;
}

a:hover {
  opacity: 0.8;
}

button:focus-visible,
a:focus-visible,
[contenteditable]:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 1px;
  border-radius: 3px;
  box-shadow: none;
}

[contenteditable]:empty:before {
  content: attr(placeholder);
  color: var(--text-tertiary);
  pointer-events: none;
  font-weight: 400;
}

[contenteditable]:focus {
  outline: none;
  background-color: transparent;
  border-radius: 0;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(55, 53, 47, 0.15);
  border-radius: 4px;
  transition: background 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(55, 53, 47, 0.3);
}

html.dark ::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
}

html.dark ::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

::selection {
  background: var(--accent-blue-light);
  color: var(--text-primary);
}

svg.lucide {
  vertical-align: middle;
}