Learn CSS fundamentals — selectors, specificity, the box model (margin, border, padding, content), display types, and the cascade.
Learn all HTML form elements — input types, labels, select, textarea, button, fieldset, and accessibility best practices.
Learn the essential HTML boilerplate, semantic tags, headings, paragraphs, links, images, and how browsers render HTML.
Understand hash tables from scratch — hash functions, chaining vs open addressing, load factor, and solving Two Sum, Group Anagrams with Python.
Master sorting algorithms — bubble sort, merge sort, quick sort with Python code, step-by-step traces, and complexity comparison table.
Master stack and queue data structures — LIFO vs FIFO, Python implementation, balanced parentheses, MinStack, and BFS with deque.
