:root {
            --primary: #2563eb;
            --accent: #10b981;
            --bg: #ffffff;
            --bg-secondary: #f8fafc;
            --text: #0f172a;
            --text-secondary: #64748b;
            --border: #e2e8f0;
            --shadow: rgba(0, 0, 0, 0.1);
            --hover: #1e40af;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
            color: var(--text);
            min-height: 100vh;
            padding: 16px;
            line-height: 1.6;
        }

        .container {
            max-width: 640px;
            margin: 0 auto;
            padding: 24px 0;
        }

        header {
            text-align: center;
            margin-bottom: 32px;
        }

        .app-title {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-bottom: 8px;
        }

        .app-icon {
            font-size: clamp(32px, 5vw, 40px);
            line-height: 1;
        }

        h1 {
            font-size: clamp(28px, 5vw, 36px);
            font-weight: 600;
            color: var(--primary);
        }

        .app-subtitle {
            font-size: clamp(14px, 2.5vw, 16px);
            color: var(--text-secondary);
        }

        .main-card {
            background: var(--bg);
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px var(--shadow), 0 2px 4px -1px var(--shadow);
            padding: 24px;
            margin-bottom: 24px;
        }

        .task-input-section {
            margin-bottom: 24px;
        }

        .input-wrapper {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        #taskInput {
            flex: 1;
            min-width: 200px;
            padding: 14px 16px;
            font-size: clamp(14px, 2.5vw, 16px);
            font-family: inherit;
            border: 2px solid var(--border);
            border-radius: 8px;
            background: var(--bg-secondary);
            color: var(--text);
            transition: all 0.2s ease;
        }

        #taskInput:focus {
            outline: none;
            border-color: var(--primary);
            background: var(--bg);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        #taskInput::placeholder {
            color: var(--text-secondary);
        }

        #addTaskBtn {
            padding: 14px 24px;
            min-height: 48px;
            min-width: 48px;
            font-size: clamp(14px, 2.5vw, 16px);
            font-weight: 500;
            font-family: inherit;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.2s ease;
            box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
        }

        #addTaskBtn:hover {
            background: var(--hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
        }

        #addTaskBtn:active {
            transform: scale(0.97);
        }

        .tasks-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }

        .tasks-count {
            font-size: clamp(14px, 2.5vw, 16px);
            color: var(--text-secondary);
            font-weight: 500;
        }

        .clear-completed-btn {
            padding: 8px 16px;
            min-height: 36px;
            font-size: clamp(13px, 2.5vw, 14px);
            font-weight: 500;
            font-family: inherit;
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .clear-completed-btn:hover {
            background: var(--bg-secondary);
            color: var(--text);
            border-color: var(--text-secondary);
        }

        .clear-completed-btn:active {
            transform: scale(0.97);
        }

        #taskList {
            list-style: none;
        }

        .task-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px;
            margin-bottom: 8px;
            background: var(--bg-secondary);
            border: 2px solid transparent;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .task-item:hover {
            border-color: var(--border);
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .task-item.completed {
            opacity: 0.6;
        }

        .task-checkbox {
            width: 24px;
            height: 24px;
            min-width: 24px;
            min-height: 24px;
            border: 2px solid var(--border);
            border-radius: 6px;
            cursor: pointer;
            position: relative;
            transition: all 0.2s ease;
            background: var(--bg);
        }

        .task-checkbox:hover {
            border-color: var(--primary);
        }

        .task-checkbox.checked {
            background: var(--accent);
            border-color: var(--accent);
        }

        .task-checkbox.checked::after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-size: 16px;
            font-weight: 600;
        }

        .task-text {
            flex: 1;
            font-size: clamp(14px, 2.5vw, 16px);
            color: var(--text);
            word-break: break-word;
        }

        .task-item.completed .task-text {
            text-decoration: line-through;
            color: var(--text-secondary);
        }

        .delete-btn {
            padding: 8px 12px;
            min-height: 36px;
            min-width: 36px;
            font-size: 18px;
            background: transparent;
            color: var(--text-secondary);
            border: none;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            line-height: 1;
        }

        .delete-btn:hover {
            background: #fee2e2;
            color: #dc2626;
        }

        .delete-btn:active {
            transform: scale(0.97);
        }

        .empty-state {
            text-align: center;
            padding: 48px 24px;
        }

        .empty-icon {
            font-size: 64px;
            margin-bottom: 16px;
            opacity: 0.3;
        }

        .empty-title {
            font-size: clamp(18px, 3vw, 20px);
            font-weight: 500;
            color: var(--text);
            margin-bottom: 8px;
        }

        .empty-text {
            font-size: clamp(14px, 2.5vw, 16px);
            color: var(--text-secondary);
        }

        .loading-state {
            text-align: center;
            padding: 24px;
            color: var(--text-secondary);
        }

        .spinner {
            width: 40px;
            height: 40px;
            border: 3px solid var(--border);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
            margin: 0 auto 16px;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .error-state {
            background: #fee2e2;
            border: 2px solid #fecaca;
            border-radius: 8px;
            padding: 16px;
            margin-bottom: 16px;
            display: none;
            animation: shake 0.4s ease;
        }

        .error-state.show {
            display: block;
        }

        .error-title {
            font-weight: 500;
            color: #dc2626;
            margin-bottom: 4px;
        }

        .error-text {
            font-size: 14px;
            color: #991b1b;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }

        @keyframes successFlash {
            0%, 100% { background: var(--bg-secondary); }
            50% { background: #d1fae5; }
        }

        .success-flash {
            animation: successFlash 0.6s ease;
        }

        @media (max-width: 480px) {
            .container {
                padding: 16px 0;
            }

            .main-card {
                padding: 16px;
                border-radius: 12px;
            }

            .input-wrapper {
                flex-direction: column;
            }

            #taskInput {
                min-width: 100%;
            }

            #addTaskBtn {
                width: 100%;
            }

            .tasks-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .clear-completed-btn {
                width: 100%;
            }
        }

        @media (min-width: 768px) {
            body {
                padding: 32px;
            }

            .container {
                padding: 48px 0;
            }

            .main-card {
                padding: 32px;
            }

            header {
                margin-bottom: 40px;
            }
        }

#__wc_fb_btn{position:fixed;bottom:18px;right:18px;z-index:99999;background:#1a1a2e;border:1px solid rgba(255,255,255,0.12);border-radius:24px;padding:8px 14px;font-size:12px;color:#e2e8f0;cursor:pointer;font-family:system-ui,-apple-system,sans-serif;box-shadow:0 4px 16px rgba(0,0,0,0.3);display:flex;align-items:center;gap:6px;transition:all 0.2s;user-select:none}
#__wc_fb_btn:hover{background:#252540;border-color:rgba(255,255,255,0.2);transform:translateY(-1px)}
#__wc_fb_panel{position:fixed;bottom:64px;right:18px;z-index:99999;background:#0f1624;border:1px solid #1a2d45;border-radius:12px;padding:16px;width:260px;box-shadow:0 8px 32px rgba(0,0,0,0.5);display:none;font-family:system-ui,-apple-system,sans-serif}
#__wc_fb_panel.open{display:block}
.__wc_fb_title{font-size:13px;color:#e2e8f0;margin-bottom:12px;font-weight:500}
.__wc_fb_emojis{display:flex;justify-content:space-around;margin-bottom:12px}
.__wc_fb_emoji{font-size:26px;cursor:pointer;padding:6px;border-radius:8px;transition:all 0.15s;border:2px solid transparent}
.__wc_fb_emoji:hover{background:rgba(255,255,255,0.08);transform:scale(1.1)}
.__wc_fb_emoji.selected{border-color:rgba(196,168,74,0.6);background:rgba(196,168,74,0.08)}
.__wc_fb_prompt{font-size:11px;color:#4a6a90;margin-bottom:6px}
.__wc_fb_ta{width:100%;background:rgba(255,255,255,0.04);border:1px solid #1e2d45;border-radius:6px;padding:8px;color:#e2e8f0;font-size:11px;font-family:system-ui,-apple-system,sans-serif;resize:none;outline:none;box-sizing:border-box;line-height:1.5}
.__wc_fb_ta:focus{border-color:#2a4060}
.__wc_fb_actions{display:flex;gap:6px;margin-top:8px;justify-content:flex-end}
.__wc_fb_skip{font-size:11px;color:#2a4060;cursor:pointer;padding:4px 8px;background:transparent;border:none}
.__wc_fb_send{font-size:11px;color:#c4a84a;background:rgba(196,168,74,0.08);border:0.5px solid rgba(196,168,74,0.3);border-radius:4px;padding:5px 12px;cursor:pointer;font-family:system-ui}
.__wc_fb_send:hover{background:rgba(196,168,74,0.15)}
.__wc_fb_thanks{text-align:center;padding:8px 0;font-size:13px;color:#4ade80}