:root{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #21262d;--bg-card: #1c2128;--text-primary: #e6edf3;--text-secondary: #8b949e;--text-muted: #6e7681;--accent-primary: #58a6ff;--accent-secondary: #388bfd;--accent-success: #3fb950;--accent-warning: #d29922;--accent-danger: #f85149;--border-color: #30363d;--streak-fire: #ff6b35;--streak-gold: #ffd700}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6}#root{min-height:100vh}.app-container{max-width:800px;margin:0 auto;padding:2rem 1rem}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.header p{color:var(--text-secondary);font-size:1.1rem}.stats-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:1.25rem;text-align:center;transition:transform .2s ease,box-shadow .2s ease}.stat-card:hover{transform:translateY(-2px);box-shadow:0 8px 25px #0000004d}.stat-card .value{font-size:2rem;font-weight:700;color:var(--accent-primary)}.stat-card .label{font-size:.875rem;color:var(--text-secondary);margin-top:.25rem}.stat-card.streak .value{color:var(--streak-fire)}.add-habit-form{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem;margin-bottom:2rem;display:flex;gap:.75rem;flex-wrap:wrap}.add-habit-form input{flex:1;min-width:200px;padding:.75rem 1rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);font-size:1rem;transition:border-color .2s ease}.add-habit-form input:focus{outline:none;border-color:var(--accent-primary)}.add-habit-form input::placeholder{color:var(--text-muted)}.add-habit-form button{padding:.75rem 1.5rem;background:var(--accent-primary);color:var(--bg-primary);border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s ease,transform .1s ease}.add-habit-form button:hover{background:var(--accent-secondary)}.add-habit-form button:active{transform:scale(.98)}.habits-list{display:flex;flex-direction:column;gap:1rem}.habit-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;transition:border-color .2s ease,box-shadow .2s ease}.habit-card:hover{border-color:var(--accent-primary);box-shadow:0 4px 20px #58a6ff1a}.habit-card.completed{border-color:var(--accent-success)}.habit-info{flex:1;display:flex;align-items:center;gap:1rem}.habit-checkbox{width:28px;height:28px;border-radius:8px;border:2px solid var(--border-color);background:var(--bg-tertiary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;flex-shrink:0}.habit-checkbox:hover{border-color:var(--accent-success)}.habit-checkbox.checked{background:var(--accent-success);border-color:var(--accent-success)}.habit-checkbox svg{width:16px;height:16px;color:var(--bg-primary)}.habit-details h3{font-size:1.1rem;font-weight:600;margin-bottom:.25rem}.habit-meta{display:flex;align-items:center;gap:1rem;font-size:.875rem;color:var(--text-secondary)}.streak-badge{display:flex;align-items:center;gap:.35rem;color:var(--streak-fire);font-weight:600}.streak-badge svg{width:16px;height:16px}.habit-actions{display:flex;gap:.5rem}.habit-actions button{padding:.5rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.habit-actions button:hover{color:var(--accent-danger);border-color:var(--accent-danger);background:#f851491a}.habit-actions button svg{width:18px;height:18px}.reminder-toggle{display:flex;align-items:center;gap:.5rem;padding:.35rem .75rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:20px;font-size:.75rem;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.reminder-toggle:hover{border-color:var(--accent-warning)}.reminder-toggle.active{background:#d2992226;border-color:var(--accent-warning);color:var(--accent-warning)}.empty-state{text-align:center;padding:4rem 2rem;color:var(--text-secondary)}.empty-state svg{width:64px;height:64px;color:var(--text-muted);margin-bottom:1rem}.empty-state h3{font-size:1.25rem;color:var(--text-primary);margin-bottom:.5rem}.footer{text-align:center;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border-color);color:var(--text-muted);font-size:.875rem}.footer a{color:var(--accent-primary);text-decoration:none}.footer a:hover{text-decoration:underline}@media(max-width:600px){.header h1{font-size:2rem}.stats-bar{grid-template-columns:repeat(2,1fr)}.habit-card{flex-direction:column;align-items:flex-start}.habit-actions{width:100%;justify-content:flex-end}}