* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Nunito', sans-serif; -webkit-tap-highlight-color: transparent; }

        body {
            background-color: var(--bg);
            color: var(--text);
            padding-top: env(safe-area-inset-top);
            padding-bottom: max(120px, env(safe-area-inset-bottom));
            overflow-x: hidden;
            transition: background 0.3s, color 0.3s;
        }

        body.dark-mode {
            --bg: #131f24;
            --card-bg: #202f36;
            --text: #e5e5e5;
            --text-light: #a3a3a3;
        }

        /* ========== ANIMATIONS ========== */
        @keyframes slideInUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0); } 40% { transform: translateY(-10px); } 60% { transform: translateY(-5px); } }
        @keyframes pulse-glow { 0% { box-shadow: 0 0 0 0 rgba(255, 200, 0, 0.7); } 70% { box-shadow: 0 0 0 15px rgba(255, 200, 0, 0); } 100% { box-shadow: 0 0 0 0 rgba(255, 200, 0, 0); } }
        @keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }
        @keyframes pop { 0% { transform: scale(0.9); } 50% { transform: scale(1.1); } 100% { transform: scale(1); } }
        @keyframes float { 0% { transform: translateY(0px); } 50% { transform: translateY(-8px); } 100% { transform: translateY(0px); } }
        @keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
        @keyframes jackpot { 0% { transform: scale(1); } 25% { transform: scale(1.2) rotate(-5deg); } 50% { transform: scale(1.3) rotate(5deg); } 75% { transform: scale(1.2) rotate(-3deg); } 100% { transform: scale(1); } }
        @keyframes goldShine { 0% { background-position: -200% center; } 100% { background-position: 200% center; } }
        @keyframes coinDrop { 0% { transform: translateY(-100px) rotate(0deg); opacity: 1; } 100% { transform: translateY(100vh) rotate(720deg); opacity: 0; } }
        @keyframes shake { 0%, 100% { transform: translateX(0); } 10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); } 20%, 40%, 60%, 80% { transform: translateX(5px); } }
        @keyframes rainbow { 0% { filter: hue-rotate(0deg); } 100% { filter: hue-rotate(360deg); } }
        @keyframes pulse { 0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(88, 204, 2, 0.4); } 50% { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(88, 204, 2, 0); } 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(88, 204, 2, 0); } }

        /* ========== UI COMPONENTS ========== */
        header {
            background: linear-gradient(135deg, #3d8a02, #2d6e01);
            padding: max(15px, env(safe-area-inset-top)) 20px 15px;
            position: sticky;
            top: 0;
            z-index: 100;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 4px 0 rgba(0,0,0,0.15);
            margin-bottom: 20px;
        }

        .brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 24px; color: white; cursor: pointer; }
        .theme-btn { background: rgba(255,255,255,0.2); border: none; font-size: 20px; cursor: pointer; padding: 8px; border-radius: 10px; min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
        .theme-btn:focus-visible { outline: 3px solid white; outline-offset: 2px; }

        /* Skip link for accessibility */
        .skip-link { position: absolute; top: -100%; left: 50%; transform: translateX(-50%); background: var(--primary); color: white; padding: 12px 24px; border-radius: var(--radius-btn); font-weight: 700; text-decoration: none; z-index: 9999; transition: top 0.2s; }
        .skip-link:focus { top: 10px; }

        .container { max-width: 600px; margin: 0 auto; padding: 0 20px; }

        .card {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 24px;
            margin-bottom: 24px;
            border: 2px solid rgba(0,0,0,0.05);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04), 0 6px 0 rgba(0,0,0,0.04);
            transition: all 0.2s;
            position: relative;
            overflow: hidden;
            animation: slideInUp 0.5s ease-out;
        }
        
        body.dark-mode .card { border-color: #37464f; box-shadow: 0 6px 0 #37464f; }
        .card:hover { transform: translateY(-4px); }

        .section-title {
            font-size: 20px; font-weight: 800; margin: 30px 0 15px;
            color: var(--text-light); letter-spacing: normal;
        }

        .btn {
            outline: none; background: var(--secondary); color: white;
            font-weight: 800; padding: 16px; width: 100%;
            box-shadow: 0 4px 0 var(--secondary-shade); transition: all 0.1s;
            text-transform: uppercase; letter-spacing: 0.5px; position: relative; overflow: hidden;
        }
        .btn:active { transform: translateY(4px); box-shadow: none; }
        .btn::after {
            content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(255,255,255,0.2); opacity: 0; transition: opacity 0.3s;
        }
        .btn:hover::after { opacity: 1; }

        .btn-success { background: var(--primary); box-shadow: 0 4px 0 var(--primary-shade); }
        .btn-purple { background: var(--purple); box-shadow: 0 4px 0 var(--purple-shade); }
        .btn-accent { background: var(--accent); color: #5a3a00; box-shadow: 0 4px 0 var(--accent-shade); }
        .btn-ghost { background: transparent; color: var(--text-light); box-shadow: none; border: 2px solid #e5e5e5; }

        body.dark-mode .btn-ghost { border-color: #37464f; }

        /* ========== HERO ========== */
        .streak-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: linear-gradient(135deg, #fff8e1, #ffecb3); color: #7c5e00; padding: 10px 20px;
            border-radius: 24px; font-weight: 700; font-size: 15px;
            margin-bottom: 10px; 
            border: 1px solid rgba(255,193,7,0.3);
            box-shadow: 0 2px 12px rgba(255,193,7,0.2);
            animation: gentle-glow 3s ease-in-out infinite;
        }
        
        @keyframes gentle-glow {
            0%, 100% { box-shadow: 0 0 5px rgba(255, 200, 0, 0.3); }
            50% { box-shadow: 0 0 15px rgba(255, 200, 0, 0.6); }
        }
        
        .balance-hero {
            background: linear-gradient(145deg, #4a9e06 0%, #3d8a02 40%, #2d6e01 100%);
            color: white; padding: 28px 24px; text-align: center; border-radius: 28px;
            margin-bottom: 30px; 
            box-shadow: 0 12px 40px rgba(45, 110, 1, 0.3), 0 4px 0 #2a6301;
            position: relative; overflow: hidden;
        }
        .balance-hero::before {
            content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
            background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.12) 0%, transparent 50%);
            pointer-events: none;
        }
        .balance-hero::after {
            content: ''; position: absolute; top: 0; left: -100%; width: 200%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
            animation: shimmer 4s infinite;
        }
        .balance-title { font-size: 16px; opacity: 0.9; font-weight: 700; margin-bottom: 5px; letter-spacing: 0.5px; }
        .balance-amount { 
            font-size: 52px; font-weight: 800; 
            text-shadow: 0 2px 10px rgba(0,0,0,0.15);
            line-height: 1.1;
            letter-spacing: -1px;
        }
        .balance-dollars {
            font-size: 22px; font-weight: 700; opacity: 0.85; margin-top: 4px;
            letter-spacing: 0.5px;
        }
        .level-progress-bar {
            height: 10px; background: rgba(0,0,0,0.2); border-radius: 5px;
            margin: 14px auto 0; max-width: 280px; overflow: hidden;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.15);
        }
        .level-progress-fill {
            height: 100%; background: linear-gradient(90deg, rgba(255,255,255,0.85), rgba(255,255,255,0.95)); border-radius: 5px;
            transition: width 0.5s ease;
            box-shadow: 0 0 8px rgba(255,255,255,0.4);
        }

        /* ========== TASKS ========== */
        .task-row {
            display: flex; align-items: center; justify-content: space-between;
            background: var(--card-bg); padding: 18px; border-radius: 20px;
            border: 2px solid rgba(0,0,0,0.06);
            box-shadow: 0 2px 8px rgba(0,0,0,0.04), 0 4px 0 rgba(0,0,0,0.04);
            margin-bottom: 14px; transition: all 0.2s;
        }
        body.dark-mode .task-row { border-color: #37464f; box-shadow: 0 2px 8px rgba(0,0,0,0.2), 0 4px 0 #37464f; }
        .task-row:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: 0 4px 16px rgba(88,204,2,0.15), 0 4px 0 rgba(0,0,0,0.04); }

        .task-content { flex: 1; margin-right: 15px; }
        .task-name { font-weight: 700; font-size: 18px; margin-bottom: 4px; }
        .task-reward { 
            display: inline-block; font-weight: 800; font-size: 14px; 
            color: var(--primary); bg: rgba(88, 204, 2, 0.1); 
            padding: 4px 10px; border-radius: 12px; background: rgba(88,204,2,0.1); 
        }

        .task-check {
            width: 52px; height: 52px; border-radius: 16px; background: #e5e7eb;
            display: flex; align-items: center; justify-content: center;
            font-size: 24px; color: transparent; cursor: pointer;
            box-shadow: 0 4px 0 #d1d5db; transition: all 0.2s; border: none;
        }
        body.dark-mode .task-check { background: #37464f; box-shadow: 0 4px 0 #2c3940; }
        
        .task-check.completed {
            background: var(--primary); color: white;
            box-shadow: 0 4px 0 var(--primary-shade);
            animation: pop 0.3s;
        }
        .task-check:active { transform: translateY(4px); box-shadow: none; }

        /* ========== BONUS & PROGRESS ========== */
        .progress-bar {
            height: 12px; background: #e5e7eb; border-radius: 6px; overflow: hidden; margin-top: 10px;
        }
        .progress-fill {
            height: 100%; background: var(--accent); width: 0%; 
            transition: width 0.5s ease; position: relative;
        }
        .progress-fill::after {
            content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
            animation: shimmer 1.5s infinite;
        }

        /* ========== MODAL ========== */
        .modal {
            display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.7); backdrop-filter: blur(5px);
            align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s;
            overflow-y: auto; padding: 20px 0;
        }
        .modal.active { display: flex; opacity: 1; }
        
        .modal-box {
            background: var(--card-bg); padding: 30px; border-radius: 24px;
            width: 90%; max-width: 450px; position: relative;
            transform: scale(0.8); transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
            max-height: calc(100vh - 40px); overflow-y: auto;
            -webkit-overflow-scrolling: touch;
            margin: auto;
        }
        @supports (height: 100dvh) {
            .modal-box { max-height: calc(100dvh - 40px); }
        }
        .modal.active .modal-box { transform: scale(1); }

        .close-modal {
            position: absolute; top: 16px; right: 16px; font-size: 28px;
            color: var(--text-light); cursor: pointer; line-height: 1;
            background: none; border: none; padding: 0; font-family: inherit;
            min-width: 44px; min-height: 44px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 10px;
        }
        .close-modal:hover { background: rgba(0,0,0,0.05); }

        input[type="text"], input[type="number"], select, textarea {
            width: 100%; padding: 14px; border: 2px solid #e5e7eb; border-radius: 12px;
            font-size: 16px; margin: 10px 0; background: var(--bg); color: var(--text);
            outline: none; transition: border-color 0.2s;
        }
        input:focus, textarea:focus { border-color: var(--primary); }
        body.dark-mode input, body.dark-mode textarea, body.dark-mode select { border-color: #37464f; }

        .file-upload {
            border: 2px dashed #e5e7eb; padding: 20px; text-align: center;
            border-radius: 12px; margin: 15px 0; cursor: pointer; color: var(--text-light);
        }
        .file-upload:hover { border-color: var(--primary); color: var(--primary); }

        /* Weekly Survey (inline card) */
        .survey-inline-card {
            background: var(--bg);
            border: 2px solid #e5e7eb;
            border-radius: var(--radius-box);
            padding: 20px;
            margin-top: 30px;
        }
        body.dark-mode .survey-inline-card {
            border-color: #37464f;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin: 15px 0;
        }
        .star-rating span {
            font-size: 40px;
            cursor: pointer;
            transition: transform 0.2s, filter 0.2s;
            filter: grayscale(80%);
            padding: 4px;
            min-width: 48px;
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .star-rating span:hover {
            transform: scale(1.2);
        }
        .star-rating span.active {
            filter: grayscale(0%);
            transform: scale(1.1);
        }
        /* Help button for tech tasks */
        .task-help-btn {
            min-width: 28px;
            height: 28px;
            padding: 0 8px;
            border-radius: 14px;
            border: none;
            background: var(--primary);
            color: white;
            font-weight: 800;
            font-size: 13px;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 3px;
            margin-left: 8px;
            flex-shrink: 0;
            transition: all 0.2s;
            vertical-align: middle;
            box-shadow: 0 2px 8px rgba(88, 204, 2, 0.3);
        }
        .task-help-btn:hover {
            background: var(--primary-dark, #3d8a02);
            transform: scale(1.1);
            box-shadow: 0 4px 12px rgba(88, 204, 2, 0.4);
        }
        .task-help-btn:active {
            transform: scale(0.95);
        }
        body.dark-mode .task-help-btn {
            background: var(--primary);
            box-shadow: 0 2px 8px rgba(88, 204, 2, 0.2);
        }
        body.dark-mode .task-help-btn:hover {
            background: var(--primary-dark, #3d8a02);
        }

        /* ========== CELEBRATION MODALS ========== */
        .celebration-modal .modal-box {
            text-align: center;
            overflow: visible;
        }
        .celebration-icon {
            font-size: 64px;
            margin-bottom: 8px;
            animation: pop 0.4s ease-out;
        }
        .celebration-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text);
        }
        .celebration-badge {
            display: inline-block;
            font-size: 22px;
            font-weight: 800;
            padding: 8px 20px;
            border-radius: 16px;
            margin: 12px 0;
            color: white;
        }
        .celebration-message {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 20px;
            line-height: 1.5;
        }

        @keyframes confettiFall {
            0% { transform: translateY(0) rotate(0deg); opacity: 1; }
            80% { opacity: 1; }
            100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
        }

        /* ========== RESPONSIVE BREAKPOINTS ========== */
        @media (max-width: 1024px) {
            .container { max-width: 600px; margin: 0 auto; padding: 0 20px; }
        }

        @media (max-width: 768px) {
            .balance-amount { font-size: 40px; }
            .balance-dollars { font-size: 18px; }
            .card { padding: 20px; margin-bottom: 20px; }
            .modal-box { width: 92%; padding: 24px; }
            .section-title { font-size: 18px; margin: 24px 0 12px; }
            .task-name { font-size: 16px; }
            .task-check { width: 46px; height: 46px; border-radius: 14px; font-size: 22px; }
            .btn { padding: 14px; font-size: 15px; }
        }

        @media (max-width: 375px) {
            header { padding: 12px 14px; }
            .brand { font-size: 20px; gap: 6px; }
            .theme-btn { font-size: 18px; padding: 6px; min-width: 44px; min-height: 44px; }
            .container { padding: 0 12px; }
            .balance-hero { padding: 18px 14px; border-radius: 18px; }
            .balance-amount { font-size: 34px; }
            .balance-dollars { font-size: 16px; }
            .card { padding: 16px; margin-bottom: 16px; border-radius: 16px; }
            .modal-box { width: 95%; padding: 20px; border-radius: 18px; }
            .task-row { padding: 12px; margin-bottom: 10px; }
            .task-content { margin-right: 10px; }
            .task-name { font-size: 15px; }
            .task-reward { font-size: 12px; padding: 3px 8px; }
            .task-check { width: 44px; height: 44px; border-radius: 12px; font-size: 20px; }
            .section-title { font-size: 16px; margin: 20px 0 10px; }
            .btn { padding: 12px; font-size: 14px; border-radius: 12px; }
            .streak-badge { font-size: 13px; padding: 6px 12px; }
            .star-rating span { font-size: 32px; min-width: 44px; min-height: 44px; }
            .celebration-icon { font-size: 48px; }
            .celebration-title { font-size: 22px; }
            .celebration-badge { font-size: 18px; padding: 6px 14px; }
            .celebration-message { font-size: 14px; }
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            .card:hover { transform: none; }
            .task-row:hover { transform: none; }
        }

        @media (hover: none) {
            .card:hover { transform: none; }
            .task-row:hover { transform: none; border-color: rgba(0,0,0,0.05); }
        }