:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light}body{margin:0;padding:0;min-width:320px;min-height:100vh}:root{--primary-color: #007aff;--bg-color: #f5f5f7;--card-bg: #ffffff;--text-color: #1d1d1f;--danger-color: #ff3b30;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}body{background-color:var(--bg-color);color:var(--text-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;-webkit-font-smoothing:antialiased}.app-container{max-width:1000px;margin:0 auto;padding:40px 20px;min-height:100vh;display:flex;flex-direction:column}.header-section{text-align:center;margin-bottom:40px}.input-group{display:flex;gap:12px;justify-content:center;max-width:600px;margin:0 auto}.input-group input{flex:1;padding:12px 18px;border-radius:12px;border:1px solid #d2d2d7;font-size:16px;outline:none;transition:all .2s ease;background:#fff}.input-group input:focus{border-color:var(--primary-color);box-shadow:0 0 0 4px #007aff1a}.submit-btn{padding:12px 24px;border-radius:12px;background-color:var(--primary-color);color:#fff;border:none;font-weight:600;cursor:pointer;transition:transform .1s active}.submit-btn:active{transform:scale(.95)}.notes-grid{display:grid;grid-template-columns:repeat(1,1fr);gap:20px;padding-top:20px}@media(min-width:480px){.notes-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:768px){.notes-grid{grid-template-columns:repeat(3,1fr)}}@media(min-width:960px){.notes-grid{grid-template-columns:repeat(4,1fr)}}.note-card{position:relative;background:var(--card-bg);border-radius:16px;padding:20px;height:160px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;cursor:pointer;-webkit-user-select:none;user-select:none;overflow:hidden;display:flex;flex-direction:column}.note-card:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000001a}.note-card:active{transform:scale(.98)}.note-content{flex:1;overflow-y:auto;font-size:14px;line-height:1.6;word-wrap:break-word;white-space:pre-wrap;color:#424245;padding-right:4px}.note-content::-webkit-scrollbar{width:4px}.note-content::-webkit-scrollbar-track{background:transparent}.note-content::-webkit-scrollbar-thumb{background:#d2d2d7;border-radius:10px}.delete-btn{position:absolute;top:10px;right:10px;width:28px;height:28px;border-radius:14px;background:#ff3b301a;color:var(--danger-color);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;opacity:0;transition:all .2s ease;z-index:2}.note-card:hover .delete-btn{opacity:1}.delete-btn:hover{background:var(--danger-color);color:#fff}.modal-overlay{position:fixed;inset:0;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-content{background:#fff;padding:24px;border-radius:24px;width:100%;max-width:500px;box-shadow:0 25px 50px -12px #00000040}.modal-content h3{margin-top:0;margin-bottom:20px;font-size:20px}.modal-content textarea{width:100%;height:200px;margin-bottom:20px;padding:16px;border-radius:12px;border:1px solid #d2d2d7;font-size:16px;outline:none;resize:none;box-sizing:border-box;font-family:inherit}.modal-content textarea:focus{border-color:var(--primary-color)}.modal-actions{display:flex;gap:12px;justify-content:flex-end}.cancel-btn{padding:12px 20px;border-radius:10px;background:#f5f5f7;color:#1d1d1f;border:none;font-weight:600;cursor:pointer}.save-btn{padding:12px 20px;border-radius:10px;background:var(--primary-color);color:#fff;border:none;font-weight:600;cursor:pointer}