<div class="pn-wrap">
  <h2 class="pn-heading">Sticky Notes</h2>
  <div class="pn-composer">
    <textarea id="pnInput" placeholder="Write a note..." rows="2"></textarea>
    <button id="pnAdd" class="pn-add-btn">Add note</button>
  </div>
  <div class="pn-grid" id="pnGrid"></div>
</div>

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, sans-serif; background: #f8fafc; min-height: 100vh; padding: 24px; }

.pn-wrap { max-width: 640px; margin: 0 auto; }
.pn-heading { font-size: 18px; font-weight: 800; color: #1e293b; margin-bottom: 14px; }

.pn-composer { display: flex; gap: 10px; margin-bottom: 20px; align-items: flex-start; }
.pn-composer textarea {
  flex: 1; border: 1px solid #e2e8f0; border-radius: 10px; padding: 10px 12px;
  font-family: inherit; font-size: 13px; resize: vertical; min-height: 42px;
}
.pn-composer textarea:focus { outline: none; border-color: #6366f1; }
.pn-add-btn {
  background: #6366f1; color: #fff; border: none; border-radius: 10px; padding: 10px 16px;
  font-size: 13px; font-weight: 700; cursor: pointer; flex-shrink: 0;
}
.pn-add-btn:hover { background: #4f46e5; }

.pn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }

.pn-note {
  border-radius: 12px; padding: 14px; min-height: 110px; position: relative;
  box-shadow: 0 2px 8px rgba(15,23,42,0.08); display: flex; flex-direction: column;
}
.pn-note-text { font-size: 13px; color: #1e293b; line-height: 1.5; white-space: pre-wrap; word-break: break-word; flex: 1; }
.pn-note-remove {
  position: absolute; top: 6px; right: 8px; background: none; border: none; cursor: pointer;
  font-size: 15px; color: rgba(15,23,42,0.4); line-height: 1; padding: 2px 6px; border-radius: 6px;
}
.pn-note-remove:hover { background: rgba(15,23,42,0.08); color: #1e293b; }
.pn-empty { color: #94a3b8; font-size: 13px; grid-column: 1 / -1; text-align: center; padding: 24px 0; }

const grid = document.getElementById('pnGrid');
const input = document.getElementById('pnInput');
const addBtn = document.getElementById('pnAdd');

const COLORS = ['#fef3c7', '#fce7f3', '#dbeafe', '#dcfce7', '#ede9fe', '#ffedd5'];
const STORAGE_KEY = 'notes';

function loadNotes() {
  try {
    const raw = localStorage.getItem(STORAGE_KEY);
    if (!raw) return null;
    const parsed = JSON.parse(raw);
    return Array.isArray(parsed) ? parsed : null;
  } catch (e) {
    return null;
  }
}

function saveNotes(notes) {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(notes));
}

let notes = loadNotes();

if (!notes) {
  notes = [
    { id: 'n1', text: 'Welcome! Notes you add here are saved to localStorage automatically.', color: COLORS[0] },
    { id: 'n2', text: 'Try refreshing the page — your notes will still be here.', color: COLORS[2] },
    { id: 'n3', text: 'Click the x on any note to delete it.', color: COLORS[3] },
  ];
  saveNotes(notes);
}

function randomColor() {
  return COLORS[Math.floor(Math.random() * COLORS.length)];
}

function render() {
  grid.innerHTML = '';
  if (notes.length === 0) {
    grid.innerHTML = '<div class="pn-empty">No notes yet. Add one above.</div>';
    return;
  }
  notes.forEach((note) => {
    const card = document.createElement('div');
    card.className = 'pn-note';
    card.style.background = note.color;
    card.innerHTML = '<div class="pn-note-text"></div><button class="pn-note-remove" aria-label="Delete note">\u00D7</button>';
    card.querySelector('.pn-note-text').textContent = note.text;
    card.querySelector('.pn-note-remove').addEventListener('click', () => {
      notes = notes.filter((n) => n.id !== note.id);
      saveNotes(notes);
      render();
    });
    grid.appendChild(card);
  });
}

addBtn.addEventListener('click', () => {
  const text = input.value.trim();
  if (!text) return;
  notes.push({ id: 'n' + Date.now(), text: text, color: randomColor() });
  saveNotes(notes);
  input.value = '';
  render();
});

input.addEventListener('keydown', (e) => {
  if (e.key === 'Enter' && (e.metaKey || e.ctrlKey)) {
    addBtn.click();
  }
});

render();