:root{--bg:#121212;--bg-card:#1e1e1e;--bg-surface:#2d2d2d;--text:#ffffff;--text-muted:#a0a0a0;--primary:#3b82f6;--accent:#10b981;--border:#333;--radius:16px;--font:'Inter',sans-serif;--font-heading:'Outfit',sans-serif}
[data-theme="light"]{--bg:#f8fafc;--bg-card:#ffffff;--bg-surface:#f1f5f9;--text:#0f172a;--text-muted:#64748b;--border:#e2e8f0;--primary:#3b82f6}
*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;transition:all 0.3s}
.container{max-width:900px;margin:0 auto;padding:0 1.5rem}h1,h2,h3{font-family:var(--font-heading)}.text-muted{color:var(--text-muted)}.text-primary{color:var(--primary)}.text-accent{color:var(--accent)}.mb-4{margin-bottom:1.5rem}.mt-4{margin-top:1.5rem}.mt-2{margin-top:0.5rem}.w-100{width:100%}.flex-bw{display:flex;justify-content:space-between;align-items:center}
.navbar{padding:1rem 0;border-bottom:1px solid var(--border)}.nav-inner{display:flex;justify-content:space-between;align-items:center}.brand{font-weight:700;font-size:1.4rem;color:var(--text);text-decoration:none;font-family:var(--font-heading)}.brand span{color:var(--accent)}.nav-links{display:flex;gap:1.5rem;align-items:center}.nav-links a{color:var(--text-muted);text-decoration:none;font-weight:500;transition:all 0.2s}.nav-links a:hover{color:var(--primary)}.kofi-link{color:#ff5e5b!important}.icon-btn{background:none;border:none;color:var(--text);font-size:1.2rem;cursor:pointer;padding:0.5rem;border-radius:8px;transition:background 0.2s}.icon-btn:hover{background:var(--bg-surface)}.theme-btn{border:1px solid var(--border);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center}
.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin:2rem 0;flex-wrap:wrap;gap:1rem}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:1.5rem;text-align:center}.stat-val{font-size:2rem;font-weight:700;font-family:var(--font-heading);margin-bottom:0.2rem}.stat-lbl{font-size:0.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.05em}
.btn{font-family:var(--font);font-weight:600;padding:0.8rem 1.5rem;border:none;border-radius:8px;cursor:pointer;transition:transform 0.1s,opacity 0.2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{opacity:0.9}
.glass-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}
.habits-container{display:flex;flex-direction:column;gap:1rem}
.habit-item{display:flex;align-items:center;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:1rem;transition:transform 0.2s,border-color 0.2s}.habit-item:hover{border-color:var(--text-muted)}
.habit-info{flex:1;display:flex;align-items:center;gap:1rem;cursor:pointer}.habit-color{width:16px;height:16px;border-radius:50%}.habit-details h3{font-size:1.1rem;margin-bottom:0.2rem}.habit-details p{font-size:0.85rem;color:var(--text-muted)}
.habit-actions{display:flex;align-items:center;gap:1rem}.streak-badge{background:var(--bg-surface);padding:0.4rem 0.8rem;border-radius:100px;font-size:0.85rem;font-weight:600;display:flex;align-items:center;gap:0.3rem}.streak-badge.active{color:var(--accent);background:rgba(16,185,129,0.1)}.check-btn{width:40px;height:40px;border-radius:50%;border:2px solid var(--border);background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all 0.2s}.check-btn.done{background:var(--accent);border-color:var(--accent);color:#fff}.delete-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:1.1rem;opacity:0.5}.delete-btn:hover{color:#ef4444;opacity:1}
.heatmap-card{overflow-x:hidden}.heatmap-scroll{overflow-x:auto;padding-bottom:0.5rem;margin-top:1rem}.heatmap-scroll::-webkit-scrollbar{height:6px}.heatmap-scroll::-webkit-scrollbar-thumb{background:var(--border);border-radius:6px}
.heatmap-grid{display:grid;grid-template-rows:repeat(7,12px);grid-auto-flow:column;gap:4px;width:fit-content}.day-cell{width:12px;height:12px;border-radius:2px;background:var(--bg-surface);position:relative}.day-cell[data-title]:hover::after{content:attr(data-title);position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:#000;color:#fff;padding:4px 8px;border-radius:4px;font-size:10px;white-space:nowrap;z-index:10;pointer-events:none;margin-bottom:4px}
.h-box{display:inline-block;width:10px;height:10px;border-radius:2px;margin:0 2px}.heatmap-legend{font-size:0.8rem;color:var(--text-muted);display:flex;align-items:center}
/* Heatmap levels */.l0{background:var(--bg-surface)}.l1{background:rgba(16,185,129,0.3)}.l2{background:rgba(16,185,129,0.5)}.l3{background:rgba(16,185,129,0.8)}.l4{background:rgba(16,185,129,1)}
[data-theme="light"] .l1{background:rgba(16,185,129,0.2)}[data-theme="light"] .l2{background:rgba(16,185,129,0.4)}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.2s;z-index:1000}.modal-overlay.active{opacity:1;pointer-events:all}.modal-content{transform:translateY(20px);transition:transform 0.3s}.modal-overlay.active .modal-content{transform:translateY(0)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}
.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:0.5rem;font-size:0.9rem;color:var(--text-muted)}.form-group input{width:100%;padding:0.8rem;background:var(--bg-surface);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--font);outline:none;transition:border-color 0.2s}.form-group input:focus{border-color:var(--primary)}
.color-picker{display:flex;gap:0.5rem}.color-opt{width:32px;height:32px;border-radius:50%;cursor:pointer;border:3px solid transparent;transition:transform 0.2s}.color-opt:hover{transform:scale(1.1)}.color-opt.active{border-color:var(--text);box-shadow:0 0 0 2px var(--bg)}
.footer{margin-top:4rem;border-top:1px solid var(--border);padding:2rem 0;text-align:center}.footer-brand span{font-weight:700}.footer-links-grid{display:flex;gap:1rem;justify-content:center;margin:1rem 0}.footer-links-grid a{color:var(--text-muted);text-decoration:none;font-size:0.9rem}.footer-links-grid a:hover{color:var(--primary)}
@media(max-width:600px){.stats-row{grid-template-columns:1fr}.habit-item{flex-direction:column;align-items:flex-start;gap:1.5rem}.habit-actions{width:100%;justify-content:space-between}}