/* SetGo Design System */
        :root {
            /* Core Colors */
            --background: hsl(250, 100%, 99%);
            --foreground: hsl(240, 10%, 9%);
            
            /* Surface Colors */
            --card: hsl(0, 0%, 100%);
            --card-foreground: hsl(240, 10%, 9%);
            
            /* Brand Colors - Vibrant Purple to Pink */
            --primary: hsl(270, 91%, 65%);
            --primary-foreground: hsl(0, 0%, 100%);
            --primary-glow: hsl(280, 100%, 70%);
            
            /* Secondary - Fresh Teal */
            --secondary: hsl(174, 62%, 47%);
            --secondary-foreground: hsl(0, 0%, 100%);
            --secondary-glow: hsl(174, 100%, 60%);
            
            /* Accent - Warm Orange */
            --accent: hsl(25, 95%, 53%);
            --accent-foreground: hsl(0, 0%, 100%);
            --accent-glow: hsl(25, 100%, 60%);
            
            /* Success - Vibrant Green */
            --success: hsl(142, 76%, 36%);
            --success-foreground: hsl(0, 0%, 100%);
            --success-glow: hsl(142, 100%, 50%);
            
            /* Warning & Destructive */
            --warning: hsl(45, 93%, 47%);
            --warning-foreground: hsl(0, 0%, 100%);
            --destructive: hsl(0, 84%, 60%);
            --destructive-foreground: hsl(0, 0%, 100%);
            
            /* Neutral Colors */
            --muted: hsl(240, 5%, 96%);
            --muted-foreground: hsl(240, 4%, 46%);
            --border: hsl(240, 6%, 90%);
            --input: hsl(240, 6%, 90%);
            --ring: hsl(270, 91%, 65%);
            
            /* Gradients */
            --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-glow) 100%);
            --gradient-secondary: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-glow) 100%);
            --gradient-success: linear-gradient(135deg, var(--success) 0%, var(--success-glow) 100%);
            --gradient-warm: linear-gradient(135deg, var(--accent) 0%, var(--warning) 100%);
            --gradient-bg: linear-gradient(135deg, hsl(250, 100%, 99%) 0%, hsl(280, 100%, 98%) 100%);
            
            /* Shadows */
            --shadow-soft: 0 2px 20px -4px hsla(270, 91%, 65%, 0.1);
            --shadow-glow: 0 0 30px hsla(280, 100%, 70%, 0.3);
            --shadow-success: 0 0 30px hsla(142, 100%, 50%, 0.3);
            
            /* Radius */
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
        }

        .dark {
            /* Core Colors - Dark Theme */
            --background: hsl(240, 10%, 6%);
            --foreground: hsl(250, 100%, 95%);
            
            /* Surface Colors */
            --card: hsl(240, 10%, 8%);
            --card-foreground: hsl(250, 100%, 95%);
            
            /* Brand Colors maintain vibrancy in dark mode */
            --primary: hsl(270, 91%, 70%);
            --primary-glow: hsl(280, 100%, 75%);
            
            --secondary: hsl(174, 62%, 52%);
            --secondary-glow: hsl(174, 100%, 65%);
            
            --accent: hsl(25, 95%, 58%);
            --accent-glow: hsl(25, 100%, 65%);
            
            --success: hsl(142, 76%, 41%);
            --success-glow: hsl(142, 100%, 55%);
            
            /* Neutral adjustments */
            --muted: hsl(240, 10%, 12%);
            --muted-foreground: hsl(240, 5%, 60%);
            --border: hsl(240, 10%, 15%);
            --input: hsl(240, 10%, 15%);
            --ring: hsl(270, 91%, 70%);
            
            /* Dark gradients */
            --gradient-bg: linear-gradient(135deg, hsl(240, 10%, 6%) 0%, hsl(240, 15%, 8%) 100%);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

       html{
         scroll-behavior: smooth;
       }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: var(--gradient-bg);
            color: var(--foreground);
            min-height: 100vh;
            transition: all 0.3s ease;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem;
        }

        /* Button Styles */
        .btn-primary {
            background: var(--gradient-primary);
            color: var(--primary-foreground);
            border: none;
            border-radius: var(--radius);
            padding: 0.75rem 1.5rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-soft);
        }

        .btn-primary:hover {
            opacity: 0.9;
            box-shadow: var(--shadow-glow);
        }

        .btn-secondary {
            background: var(--muted);
            color: var(--foreground);
            border: 2px solid var(--border);
            border-radius: var(--radius);
            padding: 0.75rem 1.5rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            background: var(--card);
        }

        /* Card Styles */
        .card {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid hsla(240, 6%, 90%, 0.5);
            backdrop-filter: blur(20px);
        }

        /* Header */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            margin-bottom: 2rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .logo-icon {
            width: 3rem;
            height: 3rem;
            background: var(--gradient-primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
        }

            .material-symbols-outlined {
            font-variation-settings:'FILL' 0,'wght' 400,'GRAD' 0,'opsz' 24;
            color: white;
        }


        .logo-text {
            font-size: 2rem;
            font-weight: bold;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav {
            display: flex;
            gap: 1rem;
        }

        .nav-btn {
            padding: 0.75rem 1rem;
            border: none;
            background: transparent;
            color: var(--foreground);
            border-radius: var(--radius);
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 500;
        }

        .nav-btn.active {
            background: var(--gradient-primary);
            color: white;
        }

        .nav-btn:hover {
            background: var(--muted);
        }

        .nav-btn.active:hover {
            background: var(--gradient-primary);
            opacity: 0.9;
        }

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            text-align: center;
            padding: 1.5rem;
            border-radius: var(--radius);
            color: white;
        }

        .stat-card.primary {
            background: var(--gradient-primary);
        }

        .stat-card.success {
            background: var(--gradient-success);
        }

        .stat-card.accent {
            background: var(--gradient-warm);
        }

        .stat-card.secondary {
            background: var(--gradient-secondary);
        }

        .stat-number {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            font-size: 0.875rem;
            opacity: 0.9;
        }

        /* Goal Cards */
        .goals-container {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .goal-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid hsla(240, 6%, 90%, 0.5);
            transition: all 0.3s ease;
        }

        .goal-card:hover {
            box-shadow: 0 4px 30px -4px hsla(270, 91%, 65%, 0.2);
        }

        .goal-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 1.5rem;
        }

        .goal-info {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .goal-icon {
            width: 4rem;
            height: 4rem;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
        }

        .goal-icon.primary { background: var(--primary); }
        .goal-icon.secondary { background: var(--secondary); }
        .goal-icon.success { background: var(--success); }
        .goal-icon.accent { background: var(--accent); }
        .goal-icon.warning { background: var(--warning); }

        .goal-title {
            font-size: 1.25rem;
            font-weight: bold;
            margin-bottom: 0.5rem;
        }

        .goal-description {
            color: var(--muted-foreground);
        }

        .goal-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .delete-btn {
            background: none;
            border: none;
            color: var(--muted-foreground);
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 0.5rem;
            transition: all 0.3s ease;
        }

        .delete-btn:hover {
            color: var(--destructive);
            background: hsla(0, 84%, 60%, 0.1);
        }

        /* Progress Bar */
        .progress-container {
            margin-bottom: 1.5rem;
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.75rem;
        }

        .progress-bar {
            width: 100%;
            height: 1rem;
            background: var(--muted);
            border-radius: 0.5rem;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: var(--gradient-primary);
            border-radius: 0.5rem;
            transition: width 0.5s ease;
        }

        /* Subtasks */
        .subtasks {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }

        .subtask {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.75rem;
            border-radius: 0.5rem;
            transition: background 0.3s ease;
        }

        .subtask:hover {
            background: hsla(240, 5%, 96%, 0.5);
        }

        .subtask-checkbox {
            width: 1.75rem;
            height: 1.75rem;
            border: 2px solid var(--border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .subtask-checkbox.completed {
            background: var(--success);
            border-color: var(--success);
            color: white;
        }

        .subtask-checkbox:hover {
            border-color: var(--success);
        }

        .subtask-text {
            flex: 1;
            transition: all 0.3s ease;
        }

        .subtask-text.completed {
            text-decoration: line-through;
            color: var(--muted-foreground);
        }

        /* Modal */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1rem;
            z-index: 1000;
        }

        .modal {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            max-width: 28rem;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .modal-title {
            font-size: 1.5rem;
            font-weight: bold;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .close-btn {
            background: none;
            border: none;
            color: var(--muted-foreground);
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 0.5rem;
            transition: all 0.3s ease;
        }

        .close-btn:hover {
            background: var(--muted);
        }

        /* Form */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            font-weight: 500;
            margin-bottom: 0.5rem;
        }

        .form-input {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            background: var(--card);
            color: var(--foreground);
            transition: border-color 0.3s ease;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary);
        }

        .form-textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            background: var(--card);
            color: var(--foreground);
            resize: none;
            transition: border-color 0.3s ease;
        }

        .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
        }

        /* Category Grid */
        .category-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.75rem;
        }

        .category-btn {
            padding: 1rem;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            background: var(--card);
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .category-btn:hover {
            border-color: var(--primary);
        }

        .category-btn.selected {
            background: var(--primary);
            color: white;
            border-color: transparent;
        }

        /* Subtask Input */
        .subtask-input-group {
            display: flex;
            gap: 0.75rem;
            margin-bottom: 0.75rem;
        }

        .subtask-input {
            flex: 1;
            padding: 0.75rem;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            background: var(--card);
            color: var(--foreground);
            transition: border-color 0.3s ease;
        }

        .subtask-input:focus {
            outline: none;
            border-color: var(--primary);
        }

        .remove-subtask-btn {
            background: none;
            border: none;
            color: var(--destructive);
            cursor: pointer;
            padding: 0.75rem;
            border-radius: var(--radius);
            transition: all 0.3s ease;
        }

        .remove-subtask-btn:hover {
            background: hsla(0, 84%, 60%, 0.1);
        }

        .add-subtask-btn {
            width: 100%;
            padding: 0.75rem;
            border: 2px dashed var(--border);
            border-radius: var(--radius);
            background: transparent;
            color: var(--muted-foreground);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .add-subtask-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Modal Actions */
        .modal-actions {
            display: flex;
            gap: 0.75rem;
            margin-top: 1.5rem;
        }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 3rem 1.5rem;
        }

        .empty-icon {
            width: 4rem;
            height: 4rem;
            margin: 0 auto 1.5rem;
            color: var(--primary);
        }

        .empty-title {
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 1rem;
        }

        .empty-description {
            color: var(--muted-foreground);
            margin-bottom: 2rem;
            max-width: 24rem;
            margin-left: auto;
            margin-right: auto;
        }

        /* Theme Toggle */
        .theme-toggle {
            background: none;
            border: none;
            color: var(--foreground);
            cursor: pointer;
            padding: 0.75rem;
            border-radius: var(--radius);
            transition: all 0.3s ease;
        }

        .theme-toggle:hover {
            background: var(--muted);
        }

        /* Confetti */
        .confetti {
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 9999;
        }

        .confetti-piece {
            position: absolute;
            font-size: 1.5rem;
            animation: confetti-fall 3s ease-out infinite;
        }

        @keyframes confetti-fall {
            0% {
                transform: translateY(-100vh) rotate(0deg);
                opacity: 1;
            }
            100% {
                transform: translateY(100vh) rotate(360deg);
                opacity: 0;
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            
            .goal-info {
                flex-direction: column;
                text-align: center;
                gap: 0.75rem;
            }
            
            .goal-header {
                flex-direction: column;
                gap: 1rem;
            }
            
            .nav {
                flex-wrap: wrap;
            }
        }

        /* Animations */
        .fade-in {
            animation: fadeIn 0.3s ease-out;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .scale-in {
            animation: scaleIn 0.2s ease-out;
        }

        @keyframes scaleIn {
            from {
                transform: scale(0.95);
                opacity: 0;
            }
            to {
                transform: scale(1);
                opacity: 1;
            }
        }

        /* Hidden class */
        .hidden {
            display: none !important;
        }