:root{--font-heading: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px -2px rgba(0, 0, 0, .08), 0 2px 6px -1px rgba(0, 0, 0, .04);--shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, .12), 0 4px 12px -2px rgba(0, 0, 0, .06);--bg-primary: #f8fafc;--bg-surface: rgba(255, 255, 255, .75);--bg-input: #ffffff;--text-primary: #0f172a;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: rgba(226, 232, 240, .8);--border-focus: #8b5cf6;--brand-primary: #8b5cf6;--brand-primary-hover: #7c3aed;--brand-secondary: #3b82f6;--color-success: #10b981;--color-danger: #ef4444;--color-warning: #f59e0b;--card-blur: 16px;--accent-glow: rgba(139, 92, 246, .05)}[data-theme=dark]{--bg-primary: #09090b;--bg-surface: rgba(24, 24, 27, .7);--bg-input: #18181b;--text-primary: #f4f4f5;--text-secondary: #a1a1aa;--text-muted: #52525b;--border-color: rgba(63, 63, 70, .4);--border-focus: #a78bfa;--brand-primary: #a78bfa;--brand-primary-hover: #c084fc;--brand-secondary: #60a5fa;--color-success: #34d399;--color-danger: #f87171;--color-warning: #fbbf24;--accent-glow: rgba(167, 139, 250, .04)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-normal),color var(--transition-normal);min-height:100vh}.app-container{max-width:800px;margin:0 auto;padding:2rem 1rem 6rem}@media (max-width: 640px){.app-container{padding:1rem .75rem 6rem}}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1.25rem 1.75rem;background:var(--bg-surface);backdrop-filter:blur(var(--card-blur));-webkit-backdrop-filter:blur(var(--card-blur));border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem;position:relative;overflow:hidden}.app-header:after{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,var(--accent-glow) 0%,transparent 60%);pointer-events:none}.logo-section{display:flex;align-items:center;gap:.75rem}.logo-icon{width:2.25rem;height:2.25rem;color:var(--brand-primary);filter:drop-shadow(0 2px 8px rgba(139,92,246,.3))}.app-title{font-family:var(--font-heading);font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}.header-actions{display:flex;align-items:center;gap:1rem}button,.btn{font-family:var(--font-body);font-weight:600;font-size:.875rem;padding:.625rem 1.25rem;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;transition:all var(--transition-fast)}.btn-primary{background:var(--brand-primary);color:#fff}.btn-primary:hover{background:var(--brand-primary-hover);transform:translateY(-1px);box-shadow:0 4px 12px #8b5cf633}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-input);border:1px solid var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background:var(--border-color);border-color:var(--text-muted)}.btn-icon{padding:.5rem;border-radius:var(--radius-md);background:var(--bg-input);border:1px solid var(--border-color);color:var(--text-secondary)}.btn-icon:hover{color:var(--text-primary);background:var(--border-color)}.user-profile{display:flex;align-items:center;gap:.75rem}.user-avatar{width:2.25rem;height:2.25rem;border-radius:var(--radius-full);border:2px solid var(--brand-primary);object-fit:cover}.user-avatar-initials{width:2.25rem;height:2.25rem;border-radius:var(--radius-full);border:2px solid var(--brand-primary);background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-secondary) 100%);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem;-webkit-user-select:none;user-select:none}.user-details{display:flex;flex-direction:column}.user-name{font-size:.875rem;font-weight:600}.login-card{text-align:center;padding:3.5rem 2rem;background:var(--bg-surface);backdrop-filter:blur(var(--card-blur));-webkit-backdrop-filter:blur(var(--card-blur));border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);margin-top:4rem}.login-icon{width:4rem;height:4rem;color:var(--brand-primary);margin-bottom:1.5rem}.login-title{font-family:var(--font-heading);font-size:2rem;font-weight:800;margin-bottom:.5rem;letter-spacing:-.02em}.login-subtitle{color:var(--text-secondary);margin-bottom:2.5rem;font-size:1rem}.login-buttons{display:flex;flex-direction:column;gap:1rem;max-width:320px;margin:0 auto}.btn-google{background:#fff;color:#1f2937;border:1px solid #e5e7eb;padding:.75rem 1.5rem;font-weight:600;box-shadow:var(--shadow-sm)}.btn-google:hover{background:#f9fafb;border-color:#d1d5db;transform:translateY(-1px)}.google-icon{width:1.25rem;height:1.25rem}.btn-dev{background:#8b5cf61a;color:var(--brand-primary);border:1px dashed var(--brand-primary);padding:.75rem 1.5rem}.btn-dev:hover{background:#8b5cf633;transform:translateY(-1px)}.notification-banner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.5rem;background:linear-gradient(135deg,#8b5cf626,#3b82f626);border:1px solid var(--brand-primary);border-radius:var(--radius-md);margin-bottom:1.5rem;animation:fadeIn var(--transition-normal)}.banner-content{display:flex;align-items:center;gap:.75rem}.banner-icon{color:var(--brand-primary);flex-shrink:0}.banner-text h4{font-size:.875rem;font-weight:600}.banner-text p{font-size:.75rem;color:var(--text-secondary)}.action-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;gap:1rem}@media (max-width: 640px){.action-bar{flex-direction:column-reverse;align-items:stretch}}.filters{display:flex;gap:.25rem;background:var(--bg-surface);border:1px solid var(--border-color);padding:.25rem;border-radius:var(--radius-md);overflow-x:auto;scrollbar-width:none}.filters::-webkit-scrollbar{display:none}.filter-btn{padding:.5rem 1rem;border-radius:var(--radius-sm);background:transparent;border:none;font-size:.8125rem;color:var(--text-secondary);font-weight:600;white-space:nowrap}.filter-btn:hover{color:var(--text-primary);background:#00000008}[data-theme=dark] .filter-btn:hover{background:#ffffff08}.filter-btn.active{background:var(--brand-primary);color:#fff}.task-group{margin-bottom:2rem}.group-title{font-family:var(--font-heading);font-size:1rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:.75rem;display:flex;align-items:center;gap:.5rem}.group-title span{font-size:.75rem;background:var(--border-color);color:var(--text-secondary);padding:.125rem .5rem;border-radius:var(--radius-full)}.task-list{display:flex;flex-direction:column;gap:.75rem}.task-card{display:flex;align-items:flex-start;gap:1rem;padding:1.25rem;background:var(--bg-surface);backdrop-filter:blur(var(--card-blur));-webkit-backdrop-filter:blur(var(--card-blur));border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:all var(--transition-fast);position:relative}.task-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--text-muted)}.task-card.overdue{border-left:4px solid var(--color-danger)}.task-card.completed{opacity:.6}.task-checkbox-container{display:flex;align-items:center;justify-content:center;margin-top:.125rem;cursor:pointer;position:relative}.task-checkbox{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:1.35rem;height:1.35rem;border:2px solid var(--text-muted);border-radius:6px;outline:none;transition:all var(--transition-fast);cursor:pointer;background:var(--bg-input)}.task-checkbox-container:hover .task-checkbox{border-color:var(--brand-primary);transform:scale(1.05)}.task-checkbox:checked{background-color:var(--color-success);border-color:var(--color-success);transform:scale(.95)}.checkbox-icon{position:absolute;color:#fff;pointer-events:none;width:.85rem;height:.85rem;transform:scale(0);transition:transform .2s cubic-bezier(.12,.8,.32,1.2)}.task-checkbox:checked+.checkbox-icon{transform:scale(1)}.task-content{flex:1;min-width:0}.task-card-title{font-size:1rem;font-weight:600;margin-bottom:.25rem;transition:color var(--transition-fast)}.task-card.completed .task-card-title{text-decoration:line-through;color:var(--text-secondary)}.task-card-desc{font-size:.875rem;color:var(--text-secondary);margin-bottom:.75rem;word-wrap:break-word}.task-meta{display:flex;flex-wrap:wrap;gap:.5rem 1rem;font-size:.75rem;color:var(--text-secondary);font-weight:500}.meta-item{display:flex;align-items:center;gap:.25rem}.meta-item.overdue-text{color:var(--color-danger);font-weight:600}.meta-item.recurrence-badge{background:#8b5cf61a;color:var(--brand-primary);padding:.125rem .5rem;border-radius:var(--radius-full)}.task-actions{display:flex;align-items:center;gap:.25rem}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}.modal-card{width:100%;max-width:500px;background:var(--bg-surface);backdrop-filter:blur(var(--card-blur));-webkit-backdrop-filter:blur(var(--card-blur));border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;margin:1rem;animation:slideUp .25s cubic-bezier(.16,1,.3,1)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;border-bottom:1px solid var(--border-color)}.modal-title{font-family:var(--font-heading);font-size:1.25rem;font-weight:700}.modal-body{padding:1.5rem}.form-group{margin-bottom:1.25rem}.form-group label{display:block;font-size:.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:.5rem}.form-control{width:100%;padding:.75rem;border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-input);color:var(--text-primary);font-family:var(--font-body);font-size:.875rem;outline:none;transition:all var(--transition-fast)}.form-control:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px #8b5cf626}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.modal-footer{display:flex;justify-content:flex-end;gap:.75rem;padding:1.25rem 1.5rem;background:#00000005;border-top:1px solid var(--border-color)}[data-theme=dark] .modal-footer{background:#ffffff05}.empty-state{text-align:center;padding:4rem 2rem;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);color:var(--text-secondary);margin-top:1.5rem}.empty-icon{width:3rem;height:3rem;color:var(--text-muted);margin-bottom:1rem}.empty-title{font-size:1.125rem;font-weight:600;color:var(--text-primary);margin-bottom:.25rem}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;gap:1rem}.spinner{width:2.5rem;height:2.5rem;border:3px solid var(--border-color);border-top-color:var(--brand-primary);border-radius:var(--radius-full);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(16px);opacity:0}to{transform:translateY(0);opacity:1}}.toast-container{position:fixed;bottom:2rem;right:2rem;z-index:1100;display:flex;flex-direction:column;gap:.5rem;max-width:350px}.toast{padding:.875rem 1.25rem;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);font-size:.875rem;font-weight:500;display:flex;align-items:center;gap:.75rem;animation:slideLeft .25s cubic-bezier(.16,1,.3,1);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.toast.success{border-left:4px solid var(--color-success)}.toast.error{border-left:4px solid var(--color-danger)}@keyframes slideLeft{0%{transform:translate(32px);opacity:0}to{transform:translate(0);opacity:1}}