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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background .25s, color .25s;
}

body[data-qit-tool] {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

a { color: inherit; text-decoration: none; }

.qit-page {
  min-height: calc(100dvh - var(--shell-h));
  display: flex;
  flex-direction: column;
}

.qit-page--fill {
  height: calc(100dvh - var(--shell-h));
  min-height: 0;
  overflow: hidden;
}

.qit-page--row {
  flex-direction: row;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  transition: all .15s;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: transparent;
}

.btn-primary:hover { opacity: .92; box-shadow: var(--shadow); color: var(--btn-primary-text); }

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

input, textarea, select {
  font-family: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}